Startseite Characteristics of antibiotic resistance mechanisms and genes of Klebsiella pneumoniae
Artikel Open Access

Characteristics of antibiotic resistance mechanisms and genes of Klebsiella pneumoniae

  • Yanping Li , Suresh Kumar ORCID logo EMAIL logo , Lihu Zhang , Hongjie Wu und Hongyan Wu
Veröffentlicht/Copyright: 12. Mai 2023

Abstract

Klebsiella pneumoniae is an important multidrug-resistant (MDR) pathogen that can cause a range of infections in hospitalized patients. With the growing use of antibiotics, MDR K. pneumoniae is more prevalent, posing additional difficulties and obstacles in clinical therapy. To provide a valuable reference to deeply understand K. pneumoniae, and also to provide the theoretical basis for clinical prevention of such bacteria infections, the antibiotic resistance and mechanism of K. pneumoniae are discussed in this article. We conducted a literature review on antibiotic resistance of K. pneumoniae. We ran a thorough literature search of PubMed, Web of Science, and Scopus, among other databases. We also thoroughly searched the literature listed in the papers. We searched all antibiotic resistance mechanisms and genes of seven important antibiotics used to treat K. pneumoniae infections. Antibiotics such as β-lactams, aminoglycosides, and quinolones are used in the treatment of K. pneumoniae infection. With both chromosomal and plasmid-encoded ARGs, this pathogen has diverse resistance genes. Carbapenem resistance genes, enlarged-spectrum β-lactamase genes, and AmpC genes are the most often β-lactamase resistance genes. K. pneumoniae is a major contributor to antibiotic resistance worldwide. Understanding K. pneumoniae antibiotic resistance mechanisms and molecular characteristics will be important for the design of targeted prevention and novel control strategies against this pathogen.

1 Introduction

The gram-negative bacterium Klebsiella pneumoniae is a member of the family Enterobacteriaceae, closely related to the well-known Salmonella enterica and Escherichia coli pathogens [1]. K. pneumoniae can ferment lactose and has capsular polysaccharides. K. pneumoniae is a common hospital-acquired opportunistic pathogen, accounting for about 30% of all gram-negative bacterial infections.

K. pneumoniae can be commensals in a range of environments, including soil, water, a variety of plants, insect species, birds, and animals. Typical K. pneumoniae is widely distributed among human and animal mouth, skin, respiratory tract, urogenital tract, and intestine [2,3]. K. pneumoniae causes infections through gene or plasmid horizontal transfer [4]. A large percentage of K. pneumoniae infections occur in newborns, the elderly, and those with compromised immune systems [2]. It can infect the respiratory tract, the urinary tract, as well as wounds or soft tissues. Even with appropriate antibiotic treatment, the mortality rate of hospital-acquired pneumonia is still more than 50%. The incidence rate and mortality of diseases caused by K. pneumoniae are very high, especially for newborns, leukaemia patients, and other immunodeficiency patients. With the growing use of antibiotics, multidrug-resistant (MDR) K. pneumoniae has become more common, posing greater difficulties and obstacles in clinical treatment. The World Health Organization recognizes extended-spectrum β-lactam (ESBL)-producing and carbapenem-resistant K. pneumoniae (CRKP) as a critical public health threat [5]. Transmission of K. pneumoniae is shown in Figure 1.

Figure 1 
               Transmission of K. pneumoniae.
Figure 1

Transmission of K. pneumoniae.

We deepened all antibiotic resistance mechanisms and genes of seven important antibiotics used to treat K. pneumoniae infections. We conducted a literature evaluation of antibiotic resistance in K. pneumoniae. We ran a thorough literature search in PubMed, Web of Science, and Scopus, among other databases. Keywords such as antibiotics or antibiotic resistant or antimicrobial resistant or drug resistant or drug-resistant were searched in various databases, and literatures with keywords such as K. pneumoniae or K. pneumoniaee were also included. It also contains seven antibiotics, namely β-lactam, macrolide, aminoglycoside, lincomycin, chloramphenicol, peptides, and other themes. We also thoroughly deepened the literature listed in the papers.

2 Antibiotic resistance in K. pneumoniae

Antibiotics such as aminoglycosides and cephalosporins are commonly used to treat K. pneumoniae. The choice of an antimicrobial agent is based on the patient’s health, medical history, and disease severity [9,12]. For urinary tract infections caused by MDR-resistant Klebsiella species, a combination of amikacin and meropenem has been suggested [6]. Klebsiella infections have caused liver fistulas in patients with diabetes mellitus in Taiwan, and third-generation carbapenems have been used to treat them. For patients in clinical settings, antimicrobial resistance (AMR) in MDR K. pneumoniae is a major public health concern, restricting treatment options [7]. When compared to individuals who received combination therapy, those who received monotherapy had more treatment failures (49% vs 25%; p = 0.01) [8].

Combination therapy can delay the emergence of resistance because the simultaneous use of multiple mechanisms of action increases the pharmacodynamic killing activity of antibiotics [9]. Combination therapy with carbapenems, tetracyclines, polymyxins, and fosfomycin is suggested and frequently utilized due to the increased degree of AMR in K. pneumoniae and the rising incidence of CRKP. Repeated exposure to a large range of antimicrobial compounds can trigger the emergence of new MDR phenotypes. With the wide abuse of β-lactam antibiotics and carbapenems in clinical practice, the detection rate of K. pneumoniae infection as an opportunistic pathogen is gradually increasing in clinical practice.

K. pneumoniae shows resistance against the main antibiotic classes: carbapenems, cephalosporins, aminoglycosides, and fosfomycin, leading to the therapeutic failure of these agents [10]. The development of antibiotic resistance in K. pneumoniae has led to a decline in the effectiveness of traditional treatments against the pathogen. Resistance may occur due to increased efflux, drug inactivation, or altered binding to the target site. Many strains of K. pneumoniae produce ESBL or form biofilms, further exacerbating resistance. The antibiotic resistance of K. pneumoniae is mainly produced in the following five ways: (1) enzymatic antibiotic inactivation and modification, (2) antibiotic target alteration, (3) porin loss and mutation, (4) increased efflux pump expression of the antibiotic, and (5) biofilm formation [11,12]. The five mechanisms conferring antibiotic resistance to K. pneumoniae are shown in Figure 2 and Table 1.

Figure 2 
               Various mechanisms conferring antibiotic resistance to K. pneumoniae.
Figure 2

Various mechanisms conferring antibiotic resistance to K. pneumoniae.

Table 1

Resistant strategies in K. pneumoniae

Resistant strategies in K. pneumoniae Key findings References
Enzymatic antibiotic inactivation and modification β-Lactamase is an important resistance mechanism, which is divided into ESBLs, AmpC, and carbapenemases [13,18]
Antibiotic targets alteration K. pneumoniae causes drug resistance by mutating the target gene or methylating some bases [19,20,21]
Porin loss and mutation K. pneumoniae develops resistance by reducing the entry of antimicrobial agents into the bacteria by reducing the outer membrane pore protein [25,26]
Increased efflux pump expression of the antibiotic Efflux pumps reduce intracellular drug concentrations by releasing antimicrobial cells outside the cell, thereby reducing susceptibility to multiple antibiotics [29]
Biofilm formation Biofilms have osmotic barrier properties and are resistant to antimicrobial agents [31,32,33]

3 Enzymatic antibiotic inactivation and modification

Drug alteration is a major mechanism of resistance against antibiotics in K. pneumoniae [13]. β-Lactamase is an important resistance mechanism, which hydrolyses the β-loop of β-lactam. β-Lactamases are divided into ultra-broad-spectrum β-lactamases (ESBLs), cephalosporinases (AmpC), and carbapenemases [14,15,16,17]. The expression of these enzymes in K. pneumoniae renders it resistant to penicillins, cephalosporins, and carbapenems. ESBLs include SHV, TEM, OXA, CTX, and other types. AmpC is resistant to cephalosporins, cephalomycin, and enzyme inhibitors of the first to the third generation, which can be mediated by chromosomes or plasmids. Up to now, there are more than 40 genotypes of AmpC enzyme, which can spread rapidly among strains by the plasmid. The production of carbapenemases decreases the sensitivity of K. pneumoniae to carbapenems, and the emergence of CRKP makes the treatment difficult. According to the Ambler classification, carbapenemases can be classified into classes A, B, and D [18].

4 Antibiotic targets alteration

Fluoroquinolone antibiotics target DNA topoisomerase [19]. Aminoglycoside antibiotics target 16S rRNA. The mechanism of resistance to polymyxin in K. pneumoniae usually involves the modification of lipid A [20], and the mechanism of resistance to fosfomycin involves the modification targeting MurA [21]. K. pneumoniae causes drug resistance by mutating the target gene or methylating some bases so that the corresponding antimicrobial agents cannot bind to the target site.

5 Porin loss and mutation

K. pneumoniae develops resistance by reducing the entry of antimicrobial agents into the bacteria by reducing the outer membrane pore protein. Outer membrane proteins (OMPs) or porins are trimeric transmembrane proteins that are abundantly expressed on the outer membranes of Gram-negative bacteria [22,23,24]. In K. pneumoniae, OmpK35 and OmpK36 are the two major nonspecific porins associated with AMR. LamB, OmpK26, PhoE, and KpnO porins also contribute to intrinsic resistance [25,26].

6 Increased efflux pump expression of the antibiotic

Efflux pumps are membrane proteins involved in substance expulsion that reduce intracellular drug concentrations by releasing antimicrobial cells outside the cell, thereby reducing susceptibility to multiple antibiotics [27,28]. The active efflux system AcrAB-TolC can exocytosis many kinds of antibiotics, including β-lactam, macrolides, fluoroquinolones, and tetracycline, which is an important reason for the MDR K. pneumoniae [29,30].

7 Biofilm formation

K. pneumoniae is prone to form biofilms, and structures such as capsular and pili play an important role in the formation of biofilms [31]. Biofilms have osmotic barrier properties and are resistant to antimicrobial agents, and one study showed that K. pneumoniae biofilms reduced sensitivity to gentamicin, ampicillin, and ciprofloxacin [32]. Colistin resistance has also been linked to biofilm formation [33].

8 Resistance mechanisms and genes

β-Lactam antibiotics are frequently used to treat K. pneumoniae infections. When patients are infected with K. pneumoniae that is MDR or extended drug-resistant, they have no choice but to use other antibiotics (aminoglycosides, quinolones, polymyxins, tigecycline, etc.). However, when these antibiotics are used in clinical settings, they can lead to drug resistance. Antibiotic resistance-related genes were carefully summarized, and their functions in K. pneumoniae are systematically presented in Table 2.

Table 2

Antibiotic resistance-related genes in K. pneumoniae

Characteristic Gene name Gene functions References
β-Lactam blaSHV, blaTEM, blaCTX ESBLs [34,35,36]
blaGES, blaSFO, blaPER, blaTLA, blaVEB, blaKLUC-5 Lateral gene transfer [37,38,39,40]
bla KPC Bla NDM, bla VIM, bla IMP, and bla OXA Carbapenemase [41,42]
blaCMY, blaDHA, blaFOX, blaMOX AmpC plasmids [43,44]
Aminoglycoside aac, ant, aph gene,16S rRNA methylase Plasmid-encoded [45,46,47,48]
AcrAB-TolC, kpnEF, KpnO Efflux pump systems [49]
Quinolone DNA gyrase, topoisomerase IV Quinolone-binding targets [50]
OmpK36, acrAB, kdeA, OqxAB, aa(6’)-Ib-cr PMQR [51,52,53,54]
Polymyxin phoPQ, pmrA, pmrD, and mgrB Regulative gene [55,56,57]
mcr-1 Via plasmid [58,59,60]
Tigecycline AcrAB-TolC, OqxAB Efflux pump systems [61]
RarA, RamA, RamR, and AcrR Regulators of efflux pumps [61]
rpsJ Encoding ribosome [62]
tetA Efflux pump systems [61]
Fosfomycin fos Via plasmid [63]

9 β-Lactamase Resistance Genes

β-Lactamase produced by K. pneumoniae hydrolyses the β-lactam ring in antibiotics, resulting in resistance to β-lactam antibiotics. K. pneumoniae is naturally resistant to numerous β-lactamase genes attributed to the prevalence of the SHV β-lactamase in the genome sequence, and ampicillin resistance is a defining trait of the organism.

10 ESBLs

ESBLs are plasmid-based antibiotic resistance pathways identified in the accessory genome. In Germany [35], the blaSHV-2 (ESBL) gene in K. pneumoniae was found for the first time. Soon after, blaTEM-3, a viral vector ESBL mutant gene, was found in France [64]. The enlarged-spectrum action of ESBL genes against β-lactams, including third-generation carbapenems, is inhibited by clavulanic acid [65].

K. pneumoniae that produces ESBL has become a prevalent pathogen in hospital infection outbreaks. CTX-M gradually superseded TEM and SHV as the main genotype of ESBLs owing to the accessibility of plasmids and transposons generating blaCTX-M-type ESBLs [36]. Other ESBL genotypes were also transmitted to K. pneumoniae by horizontal gene transfer, including blaOXA type ESBLs [38] and the uncommon genes bla GES, bla SFO [37], or bla PER, bla TLA, bla VEB [40], and bla KLUC-5 [39]. K. pneumoniae that produces ESBL is becoming more common over the world, with endemic rates of up to 50% in some areas [39]. Carbapenems have traditionally been the treatment of choice for treating ESBL-producing bacterial infections.

11 Carbapenem resistance genes

Carbapenem use has increased significantly as a result of the MDR phenotypic characteristics of ESBL-producing K. pneumoniae strains. Carbapenem resistance has evolved, possibly as a result of the selective pressure of carbapenems treatment, and K. pneumoniae has emerged as the most prevalent carbapenem-resistant Enterobacteriaceae (CRE).

The carbapenem enzymes regulated by plasmids are still the most concerned pathway of multidrug resistance. KPC is a serine-based class β-lactamase that is the most common and damaging carbapenemase in K. pneumoniae. Clonal group 258 (CG258) is linked to KPCs [66,67]. ST258 (ST258) is found in Europe, America, and Asia, while ST11 is prevalent in Asia [68,69,70,71,72]. bla KPC genes are discovered in a specific Tn4401 transposition form and are incorporated onto plasmids of several plasmid types in addition to clonal dissemination [73], making it easier to spread the gene to others [74]. Bla NDM, bla VIM, bla IMP, and bla OXA are other carbapenemase genes found in K. pneumoniae [41]. Ripabelli et al. evaluated resistance to 19 antibiotics in Italy by disk diffusion and agar dilution method. The highly pathogenic variant of NDM-1 was screened for the first time in their study [75]. Such resistance genes can cause a large number of carbapenemase-producing Enterobacteriaceae (CPE) to be resistant to many commonly used clinical antibiotics, resulting in the difficult clinical treatment of CPE and high mortality. KPCs are generally resistant to conventional β-lactamase inhibitors, creating a therapeutic issue [76]. These resistances are virtually impossible to regulate due to the translocation of carbapenemase-encoding genes from K. pneumoniae plasmids onto the chromosome [41]. In the lack of the carbapenemase gene, K. pneumoniae can become carbapenem-resistant, owing to the loss of porin, increased effluent pump, and excessive production of β-lactamases such as ESBL and AmpC. Clinically, CRKP infection is a tough problem in the clinic [77].

12 Plasmid-mediated AmpC Genes

Plasmid-mediated AmpC-like cephalosporins evolved and dispersed in these species due to K. pneumoniae’s exceptional versatility in adding β-lactamase genes onto transportable plasmids that facilitate the dissemination [43,44]. The bla AmpC gene sequences bla CMY, DHA, FOX, and MOX are most frequent in K. pneumoniae. K. pneumoniae had better β-lactam resistance owing to the presence of bla AmpC coupled with gene encoding losses or enhanced efflux, similar to blaACT-1. Plasmid genes can be readily abundantly expressed on plasmids due to the increase of many copies or promoter strength, resulting in carbapenem resistance [44].

Multiple-lactamase genes, including AmpC, KPC, SHV, and β-lactamase inhibitors, may be present in some K. pneumoniae strains. Multiple-resistant genes carried by the same strain have synergistic effects. For instance, while NDM, Vim, and IMP are not resistant to monocyclic antibiotics like aztreonam, they may develop resistance to aztreonam if ESBL or AmpC is present.

13 Aminoglycoside resistance genes

Aminoglycosides were commonly used in antibacterial chemotherapy from 1940 to 1980 until third-generation cephalosporins, carbapenems, and fluoroquinolones replaced them [78]. K. pneumoniae acquired the primary antibiotic resistance mechanisms during this time, including drug-modifying enzymes with varied functions, such as adenylation, acetylation, or phosphorylation as well as all transposon resistance genes from the aac, aph, and ant gene families [45].

The use of aminoglycosides was limited, which slowed down the emergence of novel resistance genes till the armA gene family expressed 16S rRNA methylase [46]. In K. pneumoniae, these genes are plasmid-encoded, and while drug-modifying enzymes inhibit activity [48], 16S rRNA methylase is resistant to almost all aminoglycosides, including plazomicin and newly discovered aminoglycosides [47].

Genes on chromosomes also have a role in the K. pneumoniae resistance to aminoglycoside antibiotics, which modify cell permeability through changes in the AcrAB-TolC and KpnEF efflux pump systems, as well as the loss of the putative porin KpnO. The AcrAB-TolC and KpnEF efflux pump systems changed throughout time, resulting in variable levels of resistance to different aminoglycoside antibiotics. Tobramycin and gentamicin resistance was predominant in the former, whereas tobramycin and vancomycin resistance was predominant in the latter, with gentamicin and streptomycin resistance being minor. This implies that various aminoglycosides correspond to various cell channels. Resistance to tobramycin, streptomycin, and spectinomycin was linked to the loss of the pore protein KpnO [49].

14 Quinolone resistance genes

Quinolone antibiotics function by inhibiting topoisomerases, which hinder DNA replication in bacteria. Mutations in the target gene increased MDR efflux production, and mutations to enzymes and proteins all contribute to K. pneumoniae’s tolerance to fluoroquinolones [79]. Topoisomerase IV and DNA gyrase are quinolone-binding targets with chromosomal resistance mechanisms. ParC and gyrA K. pneumoniae mutations were found earlier and also more frequently [50]. Changes in cell permeability in K. pneumoniae were linked to drug-resistant strains.

Among the most common are the deficiency of OmpK36 [51], overexpression of the gene acrAB [52], and nonalteration production of kdeA [53]. OqxAB is found in many bacteria and has been linked to plasmid-mediated quinolone resistance (PMQR) [80]. K. pneumoniae quinolone resistance has also been linked to efflux pump regulators [81].

The PMQR determinant, which is found in K. pneumoniae and other Enterobacteriaceae species, is another type of quinolone resistance gene. These genes encode a protein family that protects DNA gyrase and topoisomerase IV from quinolones. In K. pneumoniae [82], aa(6’)-Ib-cr, another PMQR gene, is thought to be the only one involved in quinolone modification. It can inactivate limited quinolones that contain the enzyme’s substrate, as well as other antibiotics. It was recently discovered on chromosomes as well. PMQR gene expression provides mechanisms for low or moderate quinolone resistance, but it also creates favourable conditions for chromosomal genetic changes to emerge [83].

15 Polymyxin resistance gene

The recent appearance of CRE has necessitated a reintroduction of polymyxins as a last-line treatment [84]. Polymyxin resistance in K. pneumoniae is typically induced by alterations in regulative genes, for instance, mgrB, which regularizes the changes of bacterial lipid A, a target of polymyxin antibiotics, lowering polymyxin interaction [55,56,57].

In 2016, the mcr-1 gene conferred colistin resistance via plasmid in an E. coli strain from China [85]. This study illustrates that easily transmissible genes potentially result in pan-resistance. In China, mcr-1 is rarely discovered in K. pneumoniae BSI isolates and is more commonly seen in E. coli. The first mcr-1 case was discovered in America in 2016. A pan-resistant isolate of K. pneumoniae was discovered in September 2016, although colistin resistance was not mediated by mcr-1 in this isolate [58,59,60].

16 Tigecycline resistance genes

Tigecycline, as a new tetracycline antibiotic, has a broad-spectrum activity against ESBL-producing strains [86]. It has been accustomed to healing K. pneumoniae infection since 2005 and the tigecycline resistance in K. pneumoniae was reported shortly after its first use. It is known that the resistance gene of this antibiotic is located on the chromosome, and the mechanism includes the modification of 30S and 16S ribosomal targets of antibiotics and the alteration of cell permeability [61]. The mechanism of antibiotic resistance is mainly related to the Ade-ABC efflux pump, Oqx-AB efflux pump, KpgABC efflux pump, Tet (A) mutant, and ribosomal protein.

Active efflux pump widely exists in the genome of K. pneumoniae. It can selectively or nonselectively pump the drugs or substrates in the bacteria out of the body, resulting in the decrease of antibacterial drug concentration in the body and drug resistance. The efflux pump transport systems involved in the resistance of K. pneumoniae to tigecycline are the AcrAB-TolC efflux pump, OqxAB efflux pump, KpgABC efflux pump, and Tet (A) efflux pump variants. Among them, the AcrAB TolC efflux pump, OqxAB efflux pump, and KpgABC efflux pump belong to the resistance nodule cell division family, and Tet (A) efflux pump variant belongs to the major facilitator super superfamily.

Ribosomal protein S10 is encoded by the rpsJ gene and is a component of the ribosomal 30S subunit. It is located near the main binding site of tetracycline and tigecycline in the ribosomal 30S subunit. Villa et al. [62] obtained three K. pneumoniae-resistant strains of tigecycline. One strain indicated that the coding gene rpsJ of S10 ribosomal protein adjacent to the target of tigecycline in the ribosomal 30S subunit had a point mutation. The reps mutation alone could confer tigecycline resistance to Enterococcus faecalis and conducted an adaptability test on six common clinical pathogens [87]. Therefore, the structural change of ribosomal protein S10 is also a potential new mechanism, which deserves attention in the follow-up research. Lupien et al. [88] show that in addition to S10, ribosomal proteins S3 and S13 are also located near the binding domain between tetracycline and ribosomal subunit, and S3 has been proved to have the function of maintaining the structural integrity of the tetracycline-binding site. Similarly, it is inferred that the structural mutation of the S3 protein may also result in tigecycline resistance. Studies have shown that without the involvement of efflux pump, rpsJ gene mutation can lead to specific resistance to tigecycline.

17 Fosfomycin resistance genes

Fosfomycin was discovered in 1969 and has a wide range of bactericidal activities [89]. Although fosfomycin is an old antibiotic, it has received renewed interest and is increasingly being used to treat infections caused by MDR bacteria [90]. However, with the increasing use of fosfomycin, resistant strains are being reported [91,92]. Resistance mechanisms of fosfomycin have been reported, including amino acid replacement or overexpression of the fosfomycin target protein MurA, deficient or reduced expression of two transporters (GlpT and UhpT), and the presence of the fos gene encoding a fosfomycin-modified enzyme that inactivates fosfomycin by activating glutathione S-transferase activity [93]. Liu et al. reported that the fosA3 gene is the main mechanism of the resistance of CRKP to fosfomycin, which can be transmitted by plasmid in hospitals. Fosfomycin target protein MurA and glpT transporter mutations were found in fosA3-negative CRKP with fosfomycin resistance [63].

18 Other mechanisms

Tolerance and persistence have long been recognized as helping bacteria survive antibiotic exposure [94]. Persister cells (persistence phenotype) with an epigenetic feature that allows them to be resistant to antibiotics while remaining latent and metabolically inactive [95].

Changes in the number of certain proteins, metabolites, and signal transduction, such as toxic chemical modules, adenosine triphosphate, and guanosine (penta) tetraphosphate, have been associated with the creation of persister formation. Despite contradicting changes in proteins, metabolites, and signal transduction, persistent bacteria form as a result of sluggish growth alone, according to Pontes and Groisman [96]. Persister cells have been seen in bacterial populations before antibiotics were introduced, sluggish growing or quiescent due to phenotypic switching [97,98]. After the antibiotics are removed, the surviving persisters regenerate into a new heterogeneous population with tolerant and sensitive subpopulations, much like the initial culture [99]. Increased antibiotic concentrations and longer antibiotic treatment reduced K. pneumoniae persistence [100]. In the fight against MDR, understanding the molecular processes governing bacterial tolerance and persistence phenotypes is critical, as it will enable the identification of new targets for creating novel anti-infective treatments.

19 Conclusions

In this study, the antibiotic resistance status, antibiotic resistance mechanism, and resistance genes of K. pneumoniae were described. In the resistance mechanism, ESBLs, carbapenemase, or AmpC targets alteration, porin loss and mutation, efflux pump overexpression, and horizontal dissemination of mobile gene elements were also studied in many fields. Up to now, the mechanism of antibiotic resistance of K. pneumoniae has not been thoroughly studied in many aspects, such as how biofilm formation regulates antibiotic resistance. Addressing the escalating prevalence of AMR, antibacterial drug therapy effect weakened, clinical treatment of severe problems such as no cure, the new drug-resistant bacteria drugs research and development work is imminent.

Novel therapies like phage therapy, nanoparticles, phytotherapy, photodynamic therapy, and antimicrobial peptides are being used to overcome resistance in K. pneumoniae infections [101,102,103,104,105]. The mechanisms of antibiotic resistance of K. pneumoniae are complex and diverse. We should provide insights into useful strategies to combat this important pathogen. How to prevent and to treat infection has become an urgent problem to be solved. It is important to determine the main antibiotic resistance genotypes for the rational use of antibiotics. Understanding K. pneumoniae antibiotic resistance mechanisms and molecular characteristics will be important for the design of targeted prevention and novel control strategies against this pathogen. At the same time, to effectively reduce and control the generation and spread of MDR bacteria, we should actively carry out antibiotic resistance monitoring and timely grasp the mechanism and characteristics of antibiotic resistance.


tel: +60 142734893

  1. Funding information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 62073231 and 82274339), Yancheng Health College Institute of Biomedical Technology (Jiangsu Province Postdoctoral Innovation Practice Base 20205003), Starting Fund for Scientific Research of High-Level Talents of the Jiangsu Vocational College of Medicine (20200013).

  2. Author contributions: We declare that this work was done by the authors named in this article and all liabilities about claims relating to the content of this article will be borne by the authors. Yanping Li, Hongjie Wu, and Lihu Zhang designed the study and supervised the data collection. Yanping Li, Hongyan Wu, and Suresh Kumar prepared the manuscript for publication and reviewed the draft of the manuscript. All authors have read and approved the manuscript.

  3. Conflict of interest: The authors declare that they have no conflict of interest.

  4. Data availability statement: Not applicable.

References

[1] Adeolu M, Alnajar S, Naushad S, S. Gupta R. Genome-based phylogeny and taxonomy of the ‘Enterobacteriales’: proposal for Enterobacterales ord. nov. divided into the families Enterobacteriaceae, Erwiniaceae fam. nov., Pectobacteriaceae fam. nov., Yersiniaceae fam. nov., Hafniaceae fam. nov., Morganellaceae fam. nov., and Budviciaceae fam. nov. Int J Syst Evol Microbiol. 2016;66(12):5575–99.10.1099/ijsem.0.001485Suche in Google Scholar PubMed

[2] Podschun R, Ullmann U. Klebsiella spp. as Nosocomial Pathogens: Epidemiology, Taxonomy, Typing Methods, and Pathogenicity Factors. Clin Microbiol Rev. 1998;11(4):589–603.10.1128/CMR.11.4.589Suche in Google Scholar PubMed PubMed Central

[3] Bagley ST. Habitat association of Klebsiella species. Infect Control. 1985;6(2):52–8.10.1017/S0195941700062603Suche in Google Scholar

[4] Wyres KL, Holt KE. Klebsiella pneumoniae as a key trafficker of drug resistance genes from environmental to clinically important bacteria. Curr OpMicrobiology. 2018;45:131–9.10.1016/j.mib.2018.04.004Suche in Google Scholar PubMed

[5] Shrivastava S, Shrivastava PS, Ramasamy J. World health organization releases global priority list of antibiotic-resistant bacteria to guide research, discovery, and development of new antibiotics. J Med Soc. 2018;32(1):76.10.4103/jms.jms_25_17Suche in Google Scholar

[6] Yasin F, Assad S, Talpur AS, Zahid M, Malik SA. Combination therapy for multidrug-resistant klebsiella pneumoniae urinary tract infection. Cureus. 2017;9(7):e1503.10.7759/cureus.1503Suche in Google Scholar PubMed PubMed Central

[7] Bassetti M, Righi E, Carnelutti A, Graziano E, Russo A. Multidrug-resistant Klebsiella pneumoniae: Challenges for treatment, prevention and infection control. Expert Rev Anti Infect Ther. 2018;16(10):749–61.10.1080/14787210.2018.1522249Suche in Google Scholar PubMed

[8] Lee GC, Burgess DS. Treatment of Klebsiella pneumoniae carbapenemase (KPC) infections: A review of published case series and case reports. Ann Clin Microbiol Antimicrob. 2012;11:32.10.1186/1476-0711-11-32Suche in Google Scholar PubMed PubMed Central

[9] Jacobs DM, Safir MC, Huang D, Minhaj F, Parker A, Rao GG. Triple combination antibiotic therapy for carbapenemase-producing Klebsiella pneumoniae: a systematic review. Ann Clin Microbiol Antimicrob. 2017;16(1):76.10.1186/s12941-017-0249-2Suche in Google Scholar PubMed PubMed Central

[10] Ferreira RL, da Silva BCM, Rezende GS, Nakamura-Silva R, Pitondo-Silva A, Campanini EB, et al. High Prevalence of Multidrug-Resistant Klebsiella pneumoniae Harboring Several Virulence and β-Lactamase Encoding Genes in a Brazilian Intensive Care Unit. Front Microbiol. 2019;22(9):3198.10.3389/fmicb.2018.03198Suche in Google Scholar PubMed PubMed Central

[11] Sikarwar AS, Batra HV. Prevalence of antimicrobial drug resistance of klebsiella pneumoniae in India. Int J Biosci Biochem Bioinf. 2011;1(3):211–5.10.7763/IJBBB.2011.V1.38Suche in Google Scholar

[12] Mulani MS, Kamble EE, Kumkar SN, Tawre MS, Pardesi KR. Emerging strategies to combat ESKAPE pathogens in the era of antimicrobial resistance: A review. Front Microbiol. 2019;10:539.10.3389/fmicb.2019.00539Suche in Google Scholar PubMed PubMed Central

[13] Santajit S, Indrawattana N. Mechanisms of antimicrobial resistance in ESKAPE pathogens. Biomed Res Int. 2016;2016:2475067.10.1155/2016/2475067Suche in Google Scholar PubMed PubMed Central

[14] Liu Y, Wan LG, Deng Q, Cao XW, Yu Y, Xu QF. First description of NDM-1-, KPC-2-, VIM-2- and IMP-4-producing Klebsiella pneumoniae strains in a single Chinese teaching hospital. Epidemiol Infect. 2015;143(2):376–84.10.1017/S0950268814000995Suche in Google Scholar PubMed PubMed Central

[15] Theuretzbacher U, Carrara E, Conti M, Tacconelli E. Role of new antibiotics for KPC-producing Klebsiella pneumoniae. J Antimicrob Chemother. 2021;76(Suppl 1):i47–54.10.1093/jac/dkaa497Suche in Google Scholar PubMed

[16] Tooke CL, Hinchliffe P, Krajnc A, Mulholland AJ, Brem J, Schofield CJ, et al. Cyclic boronates as versatile scaffolds for KPC-2 beta-lactamase inhibition. RSC Med Chem. 2020;11(4):491–6.10.1039/C9MD00557ASuche in Google Scholar

[17] Yong D, Toleman MA, Giske CG, Cho HS, Sundman K, Lee K, et al. Characterization of a new metallo-beta-lactamase gene, bla(NDM-1), and a novel erythromycin esterase gene carried on a unique genetic structure in Klebsiella pneumoniae sequence type 14 from India. Antimicrob Agents Chemother. 2009;53(12):5046–54.10.1128/AAC.00774-09Suche in Google Scholar PubMed PubMed Central

[18] Hall BG, Barlow M. Revised Ambler classification of {beta}-lactamases. J Antimicrob Chemother. 2005;55(6):1050–1.10.1093/jac/dki130Suche in Google Scholar PubMed

[19] Azargun R, Soroush Barhaghi MH, Samadi Kafil H, Ahangar Oskouee M, Sadeghi V, Memar MY, et al. Frequency of DNA gyrase and topoisomerase IV mutations and plasmid-mediated quinolone resistance genes among Escherichia coli and Klebsiella pneumoniae isolated from urinary tract infections in Azerbaijan, Iran. J Glob Antimicrob Resist. 2019;17:39–43.10.1016/j.jgar.2018.11.003Suche in Google Scholar PubMed

[20] Haeili M, Javani A, Moradi J, Jafari Z, Feizabadi MM, Babaei E. MgrB Alterations Mediate Colistin Resistance in Klebsiella pneumoniae Isolates from Iran. Front Microbiol. 2017;8:2470.10.3389/fmicb.2017.02470Suche in Google Scholar PubMed PubMed Central

[21] Liu P, Chen S, Wu ZY, Qi M, Li XY, Liu CX. Mechanisms of fosfomycin resistance in clinical isolates of carbapenem-resistant Klebsiella pneumoniae. J Glob Antimicrob Resist. 2020;22:238–43.Suche in Google Scholar

[22] Li B, Zhao Y, Liu C, Chen Z, Zhou D. Molecular pathogenesis of Klebsiella pneumoniae. Future Microbiol. 2014;9(9):1071–81.10.2217/fmb.14.48Suche in Google Scholar PubMed

[23] Liu EY, Chen JH, Lin JC, Wang CH, Fung CP, Ding YJ, et al. Cross-protection induced by highly conserved outer membrane proteins (Omps) in mice immunized with OmpC of Salmonella Typhi or OmpK36 of Klebsiella pneumoniae. Vaccine. 2022;40(18):2604–11.10.1016/j.vaccine.2022.03.016Suche in Google Scholar PubMed

[24] Ye C, Li W, Yang Y, Liu Q, Li S, Zheng P, et al. Inappropriate use of antibiotics exacerbates inflammation through OMV-induced pyroptosis in MDR Klebsiella pneumoniae infection. Cell Rep. 2021;36(12):109750.10.1016/j.celrep.2021.109750Suche in Google Scholar PubMed

[25] Wu LT, Guo MK, Ke SC, Lin YP, Pang YC, Nguyen HV, et al. Characterization of the genetic background of KPC-2-Producing Klebsiella pneumoniae with Insertion Elements Disrupting the ompK36 Porin Gene. Microb Drug Resist. 2020;26(9):1050–7.10.1089/mdr.2019.0410Suche in Google Scholar PubMed

[26] Pulzova L, Navratilova L, Comor L. Alterations in outer membrane permeability favor drug-resistant phenotype of Klebsiella pneumoniae. Microb Drug Resist. 2017;23(4):413–20.10.1089/mdr.2016.0017Suche in Google Scholar PubMed

[27] Nielsen LE, Snesrud EC, Onmus-Leone F, Kwak YI, Aviles R, Steele ED, et al. IS5 element integration, a novel mechanism for rapid in vivo emergence of tigecycline nonsusceptibility in Klebsiella pneumoniae. Antimicrob Agents Chemother. 2014;58(10):6151–6.10.1128/AAC.03053-14Suche in Google Scholar PubMed PubMed Central

[28] Tang M, Wei X, Wan X, Ding Z, Ding Y, Liu J. The role and relationship with efflux pump of biofilm formation in Klebsiella pneumoniae. Microb Pathog. 2020;147:104244.10.1016/j.micpath.2020.104244Suche in Google Scholar PubMed

[29] Bialek-Davenet S, Lavigne JP, Guyot K, Mayer N, Tournebize R, Brisse S, et al. Differential contribution of AcrAB and OqxAB efflux pumps to multidrug resistance and virulence in Klebsiella pneumoniae. J Antimicrob Chemother. 2015;70(1):81–8.10.1093/jac/dku340Suche in Google Scholar PubMed

[30] Bharatham N, Bhowmik P, Aoki M, Okada U, Sharma S, Yamashita E, et al. Structure and function relationship of OqxB efflux pump from Klebsiella pneumoniae. Nat Commun. 2021;12(1):5400.10.1038/s41467-021-25679-0Suche in Google Scholar PubMed PubMed Central

[31] Desai S, Sanghrajka K, Gajjar D. High adhesion and increased cell death contribute to strong biofilm formation in Klebsiella pneumoniae. Pathogens. 2019;8(4):277.10.3390/pathogens8040277Suche in Google Scholar PubMed PubMed Central

[32] Chung PY. The emerging problems of Klebsiella pneumoniae infections: carbapenem resistance and biofilm formation. FEMS Microbiol Lett. 2016;363(20):fnw219.10.1093/femsle/fnw219Suche in Google Scholar PubMed

[33] Cepas V, López Y, Muoz E, Rolo D, Ardanuy C, Martí S, et al. Relationship between biofilm formation and antimicrobial resistance in gram-negative bacteria. Microb Drug Resist. 2019;25(1):72–9. Mary Ann Liebert, Inc.10.1089/mdr.2018.0027Suche in Google Scholar PubMed

[34] Sirot D, Sirot J, Labia R, Morand A, Courvalin P, Darfeuille-Michaud A, et al. Transferable resistance to third-generation cephalosporins in clinical isolates of Klebsiella pneumoniae: identification of CTX-1, a novel beta-lactamase. J Antimicrob Chemother. 1987;20(3):323–34.Suche in Google Scholar

[35] Kliebe C, Nies BA, Meyer JF, Tolxdorff-Neutzling RM, Wiedemann B. Evolution of plasmid-coded resistance to broad-spectrum cephalosporins. Antimicrob Agents Chemother. 1985;28(2):302–7.10.1128/AAC.28.2.302Suche in Google Scholar PubMed PubMed Central

[36] Li CF, Tang HL, Chiou CS, Tung KC, Lu MC, Lai YC. Draft genome sequence of CTX-M-type beta-lactamase-producing Klebsiella quasipneumoniae subsp. similipneumoniae isolated from a Box turtle. J Glob Antimicrob Resist. 2018;12:235–6.10.1016/j.jgar.2017.12.012Suche in Google Scholar PubMed

[37] Bradford PA. Extended-spectrum beta-lactamases in the 21st century: characterization, epidemiology, and detection of this important resistance threat. Clin Microbiol Rev. 2001;14(4):933.10.1128/CMR.14.4.933-951.2001Suche in Google Scholar PubMed PubMed Central

[38] Evans BA, Amyes SGB. OXA β-lactamases. Clin Microbiol Rev. 2014;27(2):241–63.10.1128/CMR.00117-13Suche in Google Scholar PubMed PubMed Central

[39] Li P, Shen K, Zhang Y, Ying J, Zhu T, Liu Y, et al. Characterization of a Novel blaKLUC Variant With Reduced β-Lactam Resistance From an IncA/C Group Plasmid in a Clinical Klebsiella pneumoniae Isolate. Front Microbiol. 2018;15(9):1908.10.3389/fmicb.2018.01908Suche in Google Scholar PubMed PubMed Central

[40] Slama P, Deny P, Labia R, Philippon A. A structure-based classification of class a beta-lactamases, a broadly diverse family of enzymes. Clin Microbiol Rev. 2016;29(1):29–57.10.1128/CMR.00019-15Suche in Google Scholar PubMed PubMed Central

[41] Lee CR, Lee JH, Park KS, Kim YB, Jeong BC, Lee SH. Global dissemination of carbapenemase-producing klebsiella pneumoniae: Epidemiology, genetic context, treatment options, and detection methods. Front Microbiol. 2016;7:895.10.3389/fmicb.2016.00895Suche in Google Scholar PubMed PubMed Central

[42] Papp-Wallace KM, Bethel CR, Distler AM, Kasuboski C, Taracila M, Bonomo RA. Inhibitor resistance in the KPC-2 beta-lactamase, a preeminent property of this class A beta-lactamase. Antimicrob Agents Chemother. 2010;54(2):890–7.Suche in Google Scholar

[43] Bush K. Bench-to-bedside review: The role of beta-lactamases in antibiotic-resistant Gram-negative infections. Crit Care. 2010;14(3):224.10.1186/cc8892Suche in Google Scholar PubMed PubMed Central

[44] Jacoby GA. AmpC beta-lactamases. Clin Microbiol Rev. 2009;22(1):161–82.10.1128/CMR.00036-08Suche in Google Scholar PubMed PubMed Central

[45] Opal SM, Medeiros AA. Molecular mechanisms of antibiotic resistance in bacteria. Mandell, Douglas, and Bennett’s Principles and Practice of Infectious Diseases. 8th edn. Vol. 1. Issue 2; 2015. p. 235–51.10.1016/B978-1-4557-4801-3.00018-7Suche in Google Scholar

[46] Doi Y, Wachino JI, Arakawa Y. Aminoglycoside resistance: The emergence of acquired 16S ribosomal RNA methyltransferases. Infect Dis Clin North Am. 2016;30(2):523–37.10.1016/j.idc.2016.02.011Suche in Google Scholar PubMed PubMed Central

[47] Poulikakos P, Falagas ME. Aminoglycoside therapy in infectious diseases. Expert Opin Pharmacother. 2013;14(12):1585–97.10.1517/14656566.2013.806486Suche in Google Scholar PubMed

[48] Galimand M, Courvalin P, Lambert T. Plasmid-mediated high-level resistance to aminoglycosides in enterobacteriaceae due to 16S rRNA methylation. Antimicrob Agents Chemother. 2003;47(8):2565–71.10.1128/AAC.47.8.2565-2571.2003Suche in Google Scholar PubMed PubMed Central

[49] Srinivasan VB, Venkataramaiah M, Mondal A, Vaidyanathan V, Govil T, Rajamohan G. Functional characterization of a novel outer membrane porin KpnO, regulated by PhoBR two-component system in Klebsiella pneumoniae NTUH-K2044. PLoS One. 2012;7(7):e41505.10.1371/journal.pone.0041505Suche in Google Scholar PubMed PubMed Central

[50] Nam YS, Cho SY, Yang HY, Park KS, Jang JH, Kim YT, et al. Investigation of mutation distribution in DNA gyrase and topoisomerase IV genes in ciprofloxacin-non-susceptible Enterobacteriaceae isolated from blood cultures in a tertiary care university hospital in South Korea, 2005–2010. Int J Antimicrob Agents. 2013;41(2):126–9.10.1016/j.ijantimicag.2012.10.004Suche in Google Scholar PubMed

[51] Martinez-Martinez L, Hernández-Allés S, Albertí S, Tomás JM, Benedi VJ, Jacoby GA. In vivo selection of porin-deficient mutants of Klebsiella pneumoniae with increased resistance to cefoxitin and expanded-spectrum-cephalosporins. Antimicrob Agents Chemother. 1996;40(2):342.10.1128/AAC.40.2.342Suche in Google Scholar PubMed PubMed Central

[52] Mazzariol A, Zuliani J, Cornaglia G, Rossolini GM, Fontana R. AcrAB efflux system: Expression and contribution to fluoroquinolone resistance in Klebsiella spp. Antimicrob Agents Chemother. 2002;46(12):3984–6.10.1128/AAC.46.12.3984-3986.2002Suche in Google Scholar PubMed PubMed Central

[53] Ping Y, Ogawa W, Kuroda T, Tsuchiya T. Gene cloning and characterization of KdeA, a multidrug efflux pump from Klebsiella pneumoniae. Biol Pharm Bull. 2007;30(10):1962–4196.10.1248/bpb.30.1962Suche in Google Scholar PubMed

[54] Ruiz E, Saenz Y, Zarazaga M, Rocha-Gracia R, Martinez-Martinez L, Arlet G, et al. qnr, aac(6’)-Ib-cr and qepA genes in Escherichia coli and Klebsiella spp.: genetic environments and plasmid and chromosomal location. J Antimicrob Chemother. 2012;67(4):886–97.Suche in Google Scholar

[55] da Silva DM, Faria-Junior C, Nery DR, de Oliveira PM, Silva LD, Alves EG, et al. Insertion Sequences Disrupting mgrB in Carbapenem-Resistant Klebsiella pneumoniae Strains in Brazil. J Glob Antimicrob Resist. 2020;24:53–7.10.1016/j.jgar.2020.11.003Suche in Google Scholar PubMed

[56] Laurent P, Aurélie J, Séverine B, Maria-Virginia V, Melda O, Salih T, et al. The mgrB gene as a key target for acquired resistance to colistin in Klebsiella pneumoniae. J Antimicrob Chemother. 2015;1:75–80.10.1093/jac/dku323Suche in Google Scholar PubMed

[57] Cannatelli A, Santos-Lopez A, Giani T, Gonzalez-Zorn B, Rossolini GM. Polymyxin Resistance Caused by mgrB Inactivation Is Not Associated with Significant Biological Cost in Klebsiella pneumoniae. Antimicrob Agents Chemother. 2015;59(5):2898–900.10.1128/AAC.04998-14Suche in Google Scholar PubMed PubMed Central

[58] Lv J, Li R, Xie M, Chen S, Chan E. Complete genetic analysis of plasmids carrying mcr-1 and other resistance genes in an Escherichia coli isolate of animal origin. J Antimicrob Chemother. 2017;72(3):696–9.Suche in Google Scholar

[59] Lai CC, Chuang YC, Chen CC, Tang HJ. Coexistence of MCR-1 and NDM-9 in a clinical carbapenem-resistant Escherichia coli isolate. Int J Antimicrob Agents. 2017;49(4):517–23.10.1016/j.ijantimicag.2017.02.001Suche in Google Scholar PubMed

[60] Mcgann P, Snesrud E, Maybank R, Corey B, Schaecher KE. Escherichia coli harboring mcr-1 and blaCTX-M on a novel IncF plasmid: First report of mcr-1 in the United States. Antimicrob Agents Chemother. 2016;60(7):4420–4.10.1128/AAC.01103-16Suche in Google Scholar PubMed PubMed Central

[61] Sekyere JO, Govinden U, Bester LA, Essack SY. Colistin and tigecycline resistance in carbapenemase‐producing Gram‐negative bacteria: emerging resistance mechanisms and detection methods. J Appl Microbiol. 2016;121(3):601–17.10.1111/jam.13169Suche in Google Scholar PubMed

[62] Villa L, Feudi C, Fortini D, Garcia-Fernandez A, Carattoli A. Genomics of KPC-producing Klebsiella pneumoniae sequence type 512 clone highlights the role of RamR and Ribosomal S10 protein mutations in conferring tigecycline resistance. Antimicrob Agents Chemother. 2014;58(3):1707–12.10.1128/AAC.01803-13Suche in Google Scholar PubMed PubMed Central

[63] Liu P, Chen S, Wu ZY, Qi M, Liu CX. Mechanisms of fosfomycin resistance in clinical isolates of carbapenem-resistant Klebsiella pneumoniae. J Glob Antimicrob Resist. 2020;22:238–43.10.1016/j.jgar.2019.12.019Suche in Google Scholar PubMed

[64] Sirot D, Sirot J, Labia R, Morand A, Courvalin P. Transferable resistance to third-generation cephalosporins in clinical isolates of Klebsiella pneumoniae: identification of CTX-1, a novel β-lactamase. Jantimicrobchemother. 1987;20(3):323–34.10.1093/jac/20.3.323Suche in Google Scholar PubMed

[65] Bush K, Jacoby GA, Medeiros AA. A functional classification scheme for beta-lactamases and its correlation with molecular structure. Antimicrob Agents Chemother. 1995;39(6):1211–33.10.1128/AAC.39.6.1211Suche in Google Scholar PubMed PubMed Central

[66] Breurec S, Guessennd N, Timinouni M, Le TA, Cao V, Ngandjio A, et al. Klebsiella pneumoniae resistant to third-generation cephalosporins in five African and two Vietnamese major towns: Multiclonal population structure with two major international clonal groups, CG15 and CG258. Clin Microbiol Infect. 2013;19(4):349–55.10.1111/j.1469-0691.2012.03805.xSuche in Google Scholar PubMed

[67] Ørjan S, Umaer N, Ståle T, Harald SD, Annette O, Reidar H, et al. Emergence of clonally related Klebsiella pneumoniae isolates of sequence type 258 producing plasmid-mediated KPC carbapenemase in Norway and Sweden. J Antimicrob Chemother. 2009;4:654–8.10.1093/jac/dkp018Suche in Google Scholar PubMed

[68] Andrade LN, Aldc D, Curiao T, Baquero F, Cantón R, Coque TM. Clonal Complex 258, the most frequently found multilocus sequence type complex in KPC-2-producing Klebsiella pneumoniae isolated in Brazilian Hospitals. Antimicrob Agents Chemother. 2012;56(8):4563–4. author reply 4565.10.1128/AAC.00219-12Suche in Google Scholar PubMed PubMed Central

[69] Baraniak A, Izdebski R, Herda M, Fiett J, Hryniewicz W, Gniadkowski M, et al. Emergence of Klebsiella pneumoniae ST258 with KPC-2 in Poland. Antimicrob Agents Chemother. 2009;53(10):4565–7.10.1128/AAC.00436-09Suche in Google Scholar PubMed PubMed Central

[70] Garcia-Fernandez A, Villa L, Carta C, Venditti C, Giordano A, Venditti M, et al. Klebsiella pneumoniae ST258 producing KPC-3 identified in italy carries novel plasmids and OmpK36/OmpK35 porin variants. Antimicrob Agents Chemother. 2012;56(4):2143–5.10.1128/AAC.05308-11Suche in Google Scholar PubMed PubMed Central

[71] Kitchel B, Rasheed JK, Patel JB, Srinivasan A, Navon-Venezia S, Carmeli Y, et al. Molecular epidemiology of KPC-producing Klebsiella pneumoniae isolates in the United States: clonal expansion of multilocus sequence type 258. Antimicrob Agents Chemother. 2009;53(8):3365–70.10.1128/AAC.00126-09Suche in Google Scholar PubMed PubMed Central

[72] Liu P, Li P, Jiang X, Bi D, Xie Y, Tai C, et al. Complete genome sequence of Klebsiella pneumoniae subsp. pneumoniae HS11286, a multidrug-resistant strain isolated from human sputum. J Bacteriol. 2012;194(7):1841–2.10.1128/JB.00043-12Suche in Google Scholar PubMed PubMed Central

[73] Naas T, Cuzon G, Truong HV, Nordmann P. Role of ISKpn7 and deletions in blaKPC gene expression. Antimicrob Agents Chemother. 2012;56(9):4753–9.10.1128/AAC.00334-12Suche in Google Scholar PubMed PubMed Central

[74] Chmelnitsky I, Shklyar M, Leavitt A, Sadovsky E, Navon-Venezia S, Ben Dalak M, et al. Mix and match of KPC-2 encoding plasmids in Enterobacteriaceae-comparative genomics. Diagn Microbiol Infect Dis. 2014;79(2):255–60.10.1016/j.diagmicrobio.2014.03.008Suche in Google Scholar PubMed

[75] Ripabelli G, Sammarco ML, Salzo A, Scutella M, Felice V, Tamburro M. New Delhi metallo-beta-lactamase (NDM-1)-producing Klebsiella pneumoniae of sequence type ST11: first identification in a hospital of central Italy. Lett Appl Microbiol. 2020;71(6):652–9.10.1111/lam.13384Suche in Google Scholar PubMed

[76] Papp-Wallace KM, Bethel CR, Distler AM, Kasuboski C, Taracila M, Bonomo RA. Inhibitor Resistance in the KPC-2 β-Lactamase, a Preeminent Property of This Class A β-Lactamase. Antimicrob Agents Chemother. 2010;54(2):890–7.10.1128/AAC.00693-09Suche in Google Scholar PubMed PubMed Central

[77] Cristina ML, Alicino C, Sartini M, Faccio V, Spagnolo AM, Bono VDL, et al. Epidemiology, management, and outcome of carbapenem-resistant Klebsiella pneumoniae bloodstream infections in hospitals within the same endemic metropolitan area. J Infect Public Health. 2017;11(2):171–7.10.1016/j.jiph.2017.06.003Suche in Google Scholar PubMed

[78] Krause KM, Serio AW, Kane TR, Connolly LE. Aminoglycosides: An overview. Cold Spring Harb Perspect Med. 2016;6(6):a027029.10.1101/cshperspect.a027029Suche in Google Scholar PubMed PubMed Central

[79] Redgrave LS, Sutton SB, Webber MA, Piddock LJ. Fluoroquinolone resistance: mechanisms, impact on bacteria, and role in evolutionary success. Trends Microbiol. 2014;22(8):438–45.10.1016/j.tim.2014.04.007Suche in Google Scholar PubMed

[80] Wong M, Chan E, Chen S. Evolution and Dissemination of OqxAB-like efflux pumps, an emerging quinolone resistance determinant among members of enterobacteriaceae. Antimicrob Agents Chemother. 2015;59(6):3290–7.10.1128/AAC.00310-15Suche in Google Scholar PubMed PubMed Central

[81] Zheng JX, Lin ZW, Sun X, Lin WH, Chen Z, Wu Y, et al. Overexpression of OqxAB and MacAB efflux pumps contributes to eravacycline resistance and heteroresistance in clinical isolates of Klebsiella pneumoniae. Emerg Microbes Infect. 2018;7(1):139–46.10.1038/s41426-018-0141-ySuche in Google Scholar PubMed PubMed Central

[82] Ruiz E, Sáenz Y, Zarazaga M, Rocha-Gracia R, Martínez-Martínez L, Arlet G, et al. qnr, aac(6′)-Ib-cr and qepA genes in Escherichia coli and Klebsiella spp.: genetic environments and plasmid and chromosomal location. J Antimicrob Chemother. 2012;67(4):886–97.10.1093/jac/dkr548Suche in Google Scholar PubMed

[83] Fabrega A, Madurga S, Giralt E, Vila J. Mechanism of action of and resistance to quinolones. Microb Biotechnol. 2009;2(1):40–61.10.1111/j.1751-7915.2008.00063.xSuche in Google Scholar PubMed PubMed Central

[84] Anastasia A, Flora K, Garifalia P, Evangelos K, Irene G, Evangelos P, et al. Colistin-resistant isolates of Klebsiella pneumoniae emerging in intensive care unit patients: first report of a multiclonal cluster. J Antimicrob Chemother. 2007;59(4):786–92.10.1093/jac/dkl562Suche in Google Scholar PubMed

[85] Liu X, Liu H, Li Y, Hao C. High prevalence of β-lactamase and plasmid-mediated quinolone resistance genes in extended-spectrum cephalosporin-resistant Escherichia coli from Dogs in Shaanxi, China. Front Microbiol. 2016;7:1843–51.10.3389/fmicb.2016.01843Suche in Google Scholar PubMed PubMed Central

[86] Guillard T, Jong AD, Limelette A, Lebreil AL, Champs CD. Characterization of quinolone resistance mechanisms in Enterobacteriaceae recovered from diseased companion animals in Europe. Vet Microbiol. 2016;194:23–9.10.1016/j.vetmic.2015.11.033Suche in Google Scholar PubMed

[87] Beabout K, Hammerstrom TG, Perez AM, Magalh EB, Prater AG, Clements TP, et al. The ribosomal S10 protein is a general target for decreased tigecycline susceptibility. Antimicrob Agents Chemother. 2015;59(9):5561–6.10.1128/AAC.00547-15Suche in Google Scholar PubMed PubMed Central

[88] Lupien A, Gingras H, Leprohon P, Ouellette M. Induced tigecycline resistance inStreptococcus pneumoniae mutants reveals mutations in ribosomal proteins and rRNA. J Antimicrob Chemother. 2015;70(11):2973–80.10.1093/jac/dkv211Suche in Google Scholar PubMed

[89] Raz R. Fosfomycin: An old—new antibiotic. Clin Microbiol Infect. 2012;18(1):4–7.10.1111/j.1469-0691.2011.03636.xSuche in Google Scholar PubMed

[90] Kurabayashi K, Tanimoto K, Fueki S, Tomita H, Hirakawa H. Elevated expression of GlpT and UhpT via FNR activation contributes to increased fosfomycin susceptibility in escherichia coli under anaerobic conditions. Antimicrob Agents Chemother. 2015;59(10):6352–60.10.1128/AAC.01176-15Suche in Google Scholar PubMed PubMed Central

[91] Liu Y, Cheng Y, Yang H, Hu L, Cheng J, Ye Y, et al. Characterization of extended-spectrum β-lactamase genes of shigella flexneri isolates with Fosfomycin resistance from patients in China. Ann Lab Med. 2017;37(5):415–9.10.3343/alm.2017.37.5.415Suche in Google Scholar PubMed PubMed Central

[92] Cao XL, Shen H, Xu YY, Xu XJ, Zhang ZF, Cheng L, et al. High prevalence of fosfomycin resistance gene fosA3 in bla CTX-M-harbouring Escherichia coli from urine in a Chinese tertiary hospital during 2010-2014. Epidemiol Infect. 2017;145(4):1–7.10.1017/S0950268816002879Suche in Google Scholar PubMed PubMed Central

[93] Falagas ME, Athanasaki F, Voulgaris GL, Triarides NA, Vardakas KZ. Resistance to fosfomycin: Mechanisms, frequency and clinical consequences. Int J Antimicrob Agents. 2018;53(1):22–8.10.1016/j.ijantimicag.2018.09.013Suche in Google Scholar PubMed

[94] Levin-Reisman I, Ronin I, Gefen O, Braniss I, Shoresh N, Balaban NQ. Antibiotic tolerance facilitates the evolution of resistance. Science. 2017;355(6327):826–30.10.1126/science.aaj2191Suche in Google Scholar PubMed

[95] Kim JS, Wood TK, Blaser MJ. Tolerant, growing cells from nutrient shifts are not persister cells. Mbio. 2017;8(2):e00354-17.10.1128/mBio.00354-17Suche in Google Scholar PubMed PubMed Central

[96] Pontes MH, Groisman EA. Slow growth determines nonheritable antibiotic resistance in Salmonella enterica. Sci Signal. 2019;12(592):eaax3938-45.10.1126/scisignal.aax3938Suche in Google Scholar PubMed PubMed Central

[97] Ackermann M. A functional perspective on phenotypic heterogeneity in microorganisms. Nat Rev Microbiol. 2015;13(8):497–508.10.1038/nrmicro3491Suche in Google Scholar PubMed

[98] Balaban NQ, Merrin J, Chait R, Kowalik L, Leibler S. Bacterial persistence as a phenotypic switch. Science. 2004;305(5690):1622–5.10.1126/science.1099390Suche in Google Scholar PubMed

[99] Dhar N, McKinney JD. Microbial phenotypic heterogeneity and antibiotic tolerance. Curr Opin Microbiol. 2007;10(1):30–8.10.1016/j.mib.2006.12.007Suche in Google Scholar PubMed

[100] Ren H, He X, Zou X, Wang G, Li S, Wu Y. Gradual increase in antibiotic concentration affects persistence of Klebsiella pneumoniae. J Antimicrob Chemother. 2015;70(12):3267–72.10.1093/jac/dkv251Suche in Google Scholar PubMed

[101] Salou M, Ekoue-Toulan DE, Dossim S, Agbonon A. In vitro activities of aqueous and hydro-ethanolic extracts of ocimum gratissimum on escherichia coli esbl, klebsiella pneumoniae esbl and methicillin- resistant staphylococcus aureus. Acad J. 2019;13(3):55–9.10.5897/AJMR2018.9004Suche in Google Scholar

[102] Principi N, Silvestri E, Esposito S. Advantages and limitations of bacteriophages for the treatment of bacterial infections. Front Pharmacol. 2019;10:513–20.10.3389/fphar.2019.00513Suche in Google Scholar PubMed PubMed Central

[103] Lee NY, Ko WC, Hsueh PR. Nanoparticles in the treatment of infections caused by multidrug-resistant organisms. Front Pharmacol. 2019;10:1153–3.10.3389/fphar.2019.01153Suche in Google Scholar PubMed PubMed Central

[104] Liu C, Zhou Y, Wang L, Han L, Lei J, Ishaq HM, et al. Photodynamic inactivation of Klebsiella pneumoniae biofilms and planktonic cells by 5-aminolevulinic acid and 5-aminolevulinic acid methyl ester. Lasers Med. 2016;31(3):557–65.10.1007/s10103-016-1891-1Suche in Google Scholar PubMed

[105] Dias LP, Souza P, Oliveira J, Vasconcelos IM, Araújo N. RcAlb-PepII, a synthetic small peptide bioinspired in the 2S albumin from the seed cake of Ricinus communis, is a potent antimicrobial agent against Klebsiella pneumoniae and Candida parapsilosis. Biochim Biophys Acta-Biomembr 2020;1862(2):183092–8.10.1016/j.bbamem.2019.183092Suche in Google Scholar PubMed

Received: 2022-06-01
Revised: 2023-04-14
Accepted: 2023-04-14
Published Online: 2023-05-12

© 2023 the author(s), published by De Gruyter

This work is licensed under the Creative Commons Attribution 4.0 International License.

Artikel in diesem Heft

  1. Research Articles
  2. Exosomes derived from mesenchymal stem cells overexpressing miR-210 inhibits neuronal inflammation and contribute to neurite outgrowth through modulating microglia polarization
  3. Current situation of acute ST-segment elevation myocardial infarction in a county hospital chest pain center during an epidemic of novel coronavirus pneumonia
  4. circ-IARS depletion inhibits the progression of non-small-cell lung cancer by circ-IARS/miR-1252-5p/HDGF ceRNA pathway
  5. circRNA ITGA7 restrains growth and enhances radiosensitivity by up-regulating SMAD4 in colorectal carcinoma
  6. WDR79 promotes aerobic glycolysis of pancreatic ductal adenocarcinoma (PDAC) by the suppression of SIRT4
  7. Up-regulation of collagen type V alpha 2 (COL5A2) promotes malignant phenotypes in gastric cancer cell via inducing epithelial–mesenchymal transition (EMT)
  8. Inhibition of TERC inhibits neural apoptosis and inflammation in spinal cord injury through Akt activation and p-38 inhibition via the miR-34a-5p/XBP-1 axis
  9. 3D-printed polyether-ether-ketone/n-TiO2 composite enhances the cytocompatibility and osteogenic differentiation of MC3T3-E1 cells by downregulating miR-154-5p
  10. Propofol-mediated circ_0000735 downregulation restrains tumor growth by decreasing integrin-β1 expression in non-small cell lung cancer
  11. PVT1/miR-16/CCND1 axis regulates gastric cancer progression
  12. Silencing of circ_002136 sensitizes gastric cancer to paclitaxel by targeting the miR-16-5p/HMGA1 axis
  13. Short-term outcomes after simultaneous gastrectomy plus cholecystectomy in gastric cancer: A pooling up analysis
  14. SCARA5 inhibits oral squamous cell carcinoma via inactivating the STAT3 and PI3K/AKT signaling pathways
  15. Molecular mechanism by which the Notch signaling pathway regulates autophagy in a rat model of pulmonary fibrosis in pigeon breeder’s lung
  16. lncRNA TPT1-AS1 promotes cell migration and invasion in esophageal squamous-cell carcinomas by regulating the miR-26a/HMGA1 axis
  17. SIRT1/APE1 promotes the viability of gastric cancer cells by inhibiting p53 to suppress ferroptosis
  18. Glycoprotein non-metastatic melanoma B interacts with epidermal growth factor receptor to regulate neural stem cell survival and differentiation
  19. Treatments for brain metastases from EGFR/ALK-negative/unselected NSCLC: A network meta-analysis
  20. Association of osteoporosis and skeletal muscle loss with serum type I collagen carboxyl-terminal peptide β glypeptide: A cross-sectional study in elder Chinese population
  21. circ_0000376 knockdown suppresses non-small cell lung cancer cell tumor properties by the miR-545-3p/PDPK1 pathway
  22. Delivery in a vertical birth chair supported by freedom of movement during labor: A randomized control trial
  23. UBE2J1 knockdown promotes cell apoptosis in endometrial cancer via regulating PI3K/AKT and MDM2/p53 signaling
  24. Metabolic resuscitation therapy in critically ill patients with sepsis and septic shock: A pilot prospective randomized controlled trial
  25. Lycopene ameliorates locomotor activity and urinary frequency induced by pelvic venous congestion in rats
  26. UHRF1-induced connexin26 methylation is involved in hearing damage triggered by intermittent hypoxia in neonatal rats
  27. LINC00511 promotes melanoma progression by targeting miR-610/NUCB2
  28. Ultra-high-performance liquid chromatography-tandem mass spectrometry analysis of serum metabolomic characteristics in people with different vitamin D levels
  29. Role of Jumonji domain-containing protein D3 and its inhibitor GSK-J4 in Hashimoto’s thyroiditis
  30. circ_0014736 induces GPR4 to regulate the biological behaviors of human placental trophoblast cells through miR-942-5p in preeclampsia
  31. Monitoring of sirolimus in the whole blood samples from pediatric patients with lymphatic anomalies
  32. Effects of osteogenic growth peptide C-terminal pentapeptide and its analogue on bone remodeling in an osteoporosis rat model
  33. A novel autophagy-related long non-coding RNAs signature predicting progression-free interval and I-131 therapy benefits in papillary thyroid carcinoma
  34. WGCNA-based identification of potential targets and pathways in response to treatment in locally advanced breast cancer patients
  35. Radiomics model using preoperative computed tomography angiography images to differentiate new from old emboli of acute lower limb arterial embolism
  36. Dysregulated lncRNAs are involved in the progress of myocardial infarction by constructing regulatory networks
  37. Single-arm trial to evaluate the efficacy and safety of baclofen in treatment of intractable hiccup caused by malignant tumor chemotherapy
  38. Genetic polymorphisms of MRPS30-DT and NINJ2 may influence lung cancer risk
  39. Efficacy of immune checkpoint inhibitors in patients with KRAS-mutant advanced non-small cell lung cancer: A retrospective analysis
  40. Pyroptosis-based risk score predicts prognosis and drug sensitivity in lung adenocarcinoma
  41. Upregulation of lncRNA LANCL1-AS1 inhibits the progression of non-small-cell lung cancer via the miR-3680-3p/GMFG axis
  42. CircRANBP17 modulated KDM1A to regulate neuroblastoma progression by sponging miR-27b-3p
  43. Exosomal miR-93-5p regulated the progression of osteoarthritis by targeting ADAMTS9
  44. Downregulation of RBM17 enhances cisplatin sensitivity and inhibits cell invasion in human hypopharyngeal cancer cells
  45. HDAC5-mediated PRAME regulates the proliferation, migration, invasion, and EMT of laryngeal squamous cell carcinoma via the PI3K/AKT/mTOR signaling pathway
  46. The association between sleep duration, quality, and nonalcoholic fatty liver disease: A cross-sectional study
  47. Myostatin silencing inhibits podocyte apoptosis in membranous nephropathy through Smad3/PKA/NOX4 signaling pathway
  48. A novel long noncoding RNA AC125257.1 facilitates colorectal cancer progression by targeting miR-133a-3p/CASC5 axis
  49. Impact of omicron wave and associated control measures in Shanghai on health management and psychosocial well-being of patients with chronic conditions
  50. Clinicopathological characteristics and prognosis of young patients aged ≤45 years old with non-small cell lung cancer
  51. TMT-based comprehensive proteomic profiling identifies serum prognostic signatures of acute myeloid leukemia
  52. The dose limits of teeth protection for patients with nasopharyngeal carcinoma undergoing radiotherapy based on the early oral health-related quality of life
  53. miR-30b-5p targeting GRIN2A inhibits hippocampal damage in epilepsy
  54. Long non-coding RNA AL137789.1 promoted malignant biological behaviors and immune escape of pancreatic carcinoma cells
  55. IRF6 and FGF1 polymorphisms in non-syndromic cleft lip with or without cleft palate in the Polish population
  56. Comprehensive analysis of the role of SFXN family in breast cancer
  57. Efficacy of bronchoscopic intratumoral injection of endostar and cisplatin in lung squamous cell carcinoma patients underwent conventional chemoradiotherapy
  58. Silencing of long noncoding RNA MIAT inhibits the viability and proliferation of breast cancer cells by promoting miR-378a-5p expression
  59. AG1024, an IGF-1 receptor inhibitor, ameliorates renal injury in rats with diabetic nephropathy via the SOCS/JAK2/STAT pathway
  60. Downregulation of KIAA1199 alleviated the activation, proliferation, and migration of hepatic stellate cells by the inhibition of epithelial–mesenchymal transition
  61. Exendin-4 regulates the MAPK and WNT signaling pathways to alleviate the osteogenic inhibition of periodontal ligament stem cells in a high glucose environment
  62. Inhibition of glycolysis represses the growth and alleviates the endoplasmic reticulum stress of breast cancer cells by regulating TMTC3
  63. The function of lncRNA EMX2OS/miR-653-5p and its regulatory mechanism in lung adenocarcinoma
  64. Tectorigenin alleviates the apoptosis and inflammation in spinal cord injury cell model through inhibiting insulin-like growth factor-binding protein 6
  65. Ultrasound examination supporting CT or MRI in the evaluation of cervical lymphadenopathy in patients with irradiation-treated head and neck cancer
  66. F-box and WD repeat domain containing 7 inhibits the activation of hepatic stellate cells by degrading delta-like ligand 1 to block Notch signaling pathway
  67. Knockdown of circ_0005615 enhances the radiosensitivity of colorectal cancer by regulating the miR-665/NOTCH1 axis
  68. Long noncoding RNA Mhrt alleviates angiotensin II-induced cardiac hypertrophy phenotypes by mediating the miR-765/Wnt family member 7B pathway
  69. Effect of miR-499-5p/SOX6 axis on atrial fibrosis in rats with atrial fibrillation
  70. Cholesterol induces inflammation and reduces glucose utilization
  71. circ_0004904 regulates the trophoblast cell in preeclampsia via miR-19b-3p/ARRDC3 axis
  72. NECAB3 promotes the migration and invasion of liver cancer cells through HIF-1α/RIT1 signaling pathway
  73. The poor performance of cardiovascular risk scores in identifying patients with idiopathic inflammatory myopathies at high cardiovascular risk
  74. miR-2053 inhibits the growth of ovarian cancer cells by downregulating SOX4
  75. Nucleophosmin 1 associating with engulfment and cell motility protein 1 regulates hepatocellular carcinoma cell chemotaxis and metastasis
  76. α-Hederin regulates macrophage polarization to relieve sepsis-induced lung and liver injuries in mice
  77. Changes of microbiota level in urinary tract infections: A meta-analysis
  78. Identification of key enzalutamide-resistance-related genes in castration-resistant prostate cancer and verification of RAD51 functions
  79. Falls during oxaliplatin-based chemotherapy for gastrointestinal malignancies – (lessons learned from) a prospective study
  80. Outcomes of low-risk birth care during the Covid-19 pandemic: A cohort study from a tertiary care center in Lithuania
  81. Vitamin D protects intestines from liver cirrhosis-induced inflammation and oxidative stress by inhibiting the TLR4/MyD88/NF-κB signaling pathway
  82. Integrated transcriptome analysis identifies APPL1/RPS6KB2/GALK1 as immune-related metastasis factors in breast cancer
  83. Genomic analysis of immunogenic cell death-related subtypes for predicting prognosis and immunotherapy outcomes in glioblastoma multiforme
  84. Circular RNA Circ_0038467 promotes the maturation of miRNA-203 to increase lipopolysaccharide-induced apoptosis of chondrocytes
  85. An economic evaluation of fine-needle cytology as the primary diagnostic tool in the diagnosis of lymphadenopathy
  86. Midazolam impedes lung carcinoma cell proliferation and migration via EGFR/MEK/ERK signaling pathway
  87. Network pharmacology combined with molecular docking and experimental validation to reveal the pharmacological mechanism of naringin against renal fibrosis
  88. PTPN12 down-regulated by miR-146b-3p gene affects the malignant progression of laryngeal squamous cell carcinoma
  89. miR-141-3p accelerates ovarian cancer progression and promotes M2-like macrophage polarization by targeting the Keap1-Nrf2 pathway
  90. lncRNA OIP5-AS1 attenuates the osteoarthritis progression in IL-1β-stimulated chondrocytes
  91. Overexpression of LINC00607 inhibits cell growth and aggressiveness by regulating the miR-1289/EFNA5 axis in non-small-cell lung cancer
  92. Subjective well-being in informal caregivers during the COVID-19 pandemic
  93. Nrf2 protects against myocardial ischemia-reperfusion injury in diabetic rats by inhibiting Drp1-mediated mitochondrial fission
  94. Unfolded protein response inhibits KAT2B/MLKL-mediated necroptosis of hepatocytes by promoting BMI1 level to ubiquitinate KAT2B
  95. Bladder cancer screening: The new selection and prediction model
  96. circNFATC3 facilitated the progression of oral squamous cell carcinoma via the miR-520h/LDHA axis
  97. Prone position effect in intensive care patients with SARS-COV-2 pneumonia
  98. Clinical observation on the efficacy of Tongdu Tuina manipulation in the treatment of primary enuresis in children
  99. Dihydroartemisinin ameliorates cerebral I/R injury in rats via regulating VWF and autophagy-mediated SIRT1/FOXO1 pathway
  100. Knockdown of circ_0113656 assuages oxidized low-density lipoprotein-induced vascular smooth muscle cell injury through the miR-188-3p/IGF2 pathway
  101. Low Ang-(1–7) and high des-Arg9 bradykinin serum levels are correlated with cardiovascular risk factors in patients with COVID-19
  102. Effect of maternal age and body mass index on induction of labor with oral misoprostol for premature rupture of membrane at term: A retrospective cross-sectional study
  103. Potential protective effects of Huanglian Jiedu Decoction against COVID-19-associated acute kidney injury: A network-based pharmacological and molecular docking study
  104. Clinical significance of serum MBD3 detection in girls with central precocious puberty
  105. Clinical features of varicella-zoster virus caused neurological diseases detected by metagenomic next-generation sequencing
  106. Collagen treatment of complex anorectal fistula: 3 years follow-up
  107. LncRNA CASC15 inhibition relieves renal fibrosis in diabetic nephropathy through down-regulating SP-A by sponging to miR-424
  108. Efficacy analysis of empirical bismuth quadruple therapy, high-dose dual therapy, and resistance gene-based triple therapy as a first-line Helicobacter pylori eradication regimen – An open-label, randomized trial
  109. SMOC2 plays a role in heart failure via regulating TGF-β1/Smad3 pathway-mediated autophagy
  110. A prospective cohort study of the impact of chronic disease on fall injuries in middle-aged and older adults
  111. circRNA THBS1 silencing inhibits the malignant biological behavior of cervical cancer cells via the regulation of miR-543/HMGB2 axis
  112. hsa_circ_0000285 sponging miR-582-3p promotes neuroblastoma progression by regulating the Wnt/β-catenin signaling pathway
  113. Long non-coding RNA GNAS-AS1 knockdown inhibits proliferation and epithelial–mesenchymal transition of lung adenocarcinoma cells via the microRNA-433-3p/Rab3A axis
  114. lncRNA UCA1 regulates miR-132/Lrrfip1 axis to promote vascular smooth muscle cell proliferation
  115. Twenty-four-color full spectrum flow cytometry panel for minimal residual disease detection in acute myeloid leukemia
  116. Hsa-miR-223-3p participates in the process of anthracycline-induced cardiomyocyte damage by regulating NFIA gene
  117. Anti-inflammatory effect of ApoE23 on Salmonella typhimurium-induced sepsis in mice
  118. Analysis of somatic mutations and key driving factors of cervical cancer progression
  119. Hsa_circ_0028007 regulates the progression of nasopharyngeal carcinoma through the miR-1179/SQLE axis
  120. Variations in sexual function after laparoendoscopic single-site hysterectomy in women with benign gynecologic diseases
  121. Effects of pharmacological delay with roxadustat on multi-territory perforator flap survival in rats
  122. Analysis of heroin effects on calcium channels in rat cardiomyocytes based on transcriptomics and metabolomics
  123. Risk factors of recurrent bacterial vaginosis among women of reproductive age: A cross-sectional study
  124. Alkbh5 plays indispensable roles in maintaining self-renewal of hematopoietic stem cells
  125. Study to compare the effect of casirivimab and imdevimab, remdesivir, and favipiravir on progression and multi-organ function of hospitalized COVID-19 patients
  126. Correlation between microvessel maturity and ISUP grades assessed using contrast-enhanced transrectal ultrasonography in prostate cancer
  127. The protective effect of caffeic acid phenethyl ester in the nephrotoxicity induced by α-cypermethrin
  128. Norepinephrine alleviates cyclosporin A-induced nephrotoxicity by enhancing the expression of SFRP1
  129. Effect of RUNX1/FOXP3 axis on apoptosis of T and B lymphocytes and immunosuppression in sepsis
  130. The function of Foxp1 represses β-adrenergic receptor transcription in the occurrence and development of bladder cancer through STAT3 activity
  131. Risk model and validation of carbapenem-resistant Klebsiella pneumoniae infection in patients with cerebrovascular disease in the ICU
  132. Calycosin protects against chronic prostatitis in rats via inhibition of the p38MAPK/NF-κB pathway
  133. Pan-cancer analysis of the PDE4DIP gene with potential prognostic and immunotherapeutic values in multiple cancers including acute myeloid leukemia
  134. The safety and immunogenicity to inactivated COVID-19 vaccine in patients with hyperlipemia
  135. Circ-UBR4 regulates the proliferation, migration, inflammation, and apoptosis in ox-LDL-induced vascular smooth muscle cells via miR-515-5p/IGF2 axis
  136. Clinical characteristics of current COVID-19 rehabilitation outpatients in China
  137. Luteolin alleviates ulcerative colitis in rats via regulating immune response, oxidative stress, and metabolic profiling
  138. miR-199a-5p inhibits aortic valve calcification by targeting ATF6 and GRP78 in valve interstitial cells
  139. The application of iliac fascia space block combined with esketamine intravenous general anesthesia in PFNA surgery of the elderly: A prospective, single-center, controlled trial
  140. Elevated blood acetoacetate levels reduce major adverse cardiac and cerebrovascular events risk in acute myocardial infarction
  141. The effects of progesterone on the healing of obstetric anal sphincter damage in female rats
  142. Identification of cuproptosis-related genes for predicting the development of prostate cancer
  143. Lumican silencing ameliorates β-glycerophosphate-mediated vascular smooth muscle cell calcification by attenuating the inhibition of APOB on KIF2C activity
  144. Targeting PTBP1 blocks glutamine metabolism to improve the cisplatin sensitivity of hepatocarcinoma cells through modulating the mRNA stability of glutaminase
  145. A single center prospective study: Influences of different hip flexion angles on the measurement of lumbar spine bone mineral density by dual energy X-ray absorptiometry
  146. Clinical analysis of AN69ST membrane continuous venous hemofiltration in the treatment of severe sepsis
  147. Antibiotics therapy combined with probiotics administered intravaginally for the treatment of bacterial vaginosis: A systematic review and meta-analysis
  148. Construction of a ceRNA network to reveal a vascular invasion associated prognostic model in hepatocellular carcinoma
  149. A pan-cancer analysis of STAT3 expression and genetic alterations in human tumors
  150. A prognostic signature based on seven T-cell-related cell clustering genes in bladder urothelial carcinoma
  151. Pepsin concentration in oral lavage fluid of rabbit reflux model constructed by dilating the lower esophageal sphincter
  152. The antihypertensive felodipine shows synergistic activity with immune checkpoint blockade and inhibits tumor growth via NFAT1 in LUSC
  153. Tanshinone IIA attenuates valvular interstitial cells’ calcification induced by oxidized low density lipoprotein via reducing endoplasmic reticulum stress
  154. AS-IV enhances the antitumor effects of propofol in NSCLC cells by inhibiting autophagy
  155. Establishment of two oxaliplatin-resistant gallbladder cancer cell lines and comprehensive analysis of dysregulated genes
  156. Trial protocol: Feasibility of neuromodulation with connectivity-guided intermittent theta-burst stimulation for improving cognition in multiple sclerosis
  157. LncRNA LINC00592 mediates the promoter methylation of WIF1 to promote the development of bladder cancer
  158. Factors associated with gastrointestinal dysmotility in critically ill patients
  159. Mechanisms by which spinal cord stimulation intervenes in atrial fibrillation: The involvement of the endothelin-1 and nerve growth factor/p75NTR pathways
  160. Analysis of two-gene signatures and related drugs in small-cell lung cancer by bioinformatics
  161. Silencing USP19 alleviates cigarette smoke extract-induced mitochondrial dysfunction in BEAS-2B cells by targeting FUNDC1
  162. Menstrual irregularities associated with COVID-19 vaccines among women in Saudi Arabia: A survey during 2022
  163. Ferroptosis involves in Schwann cell death in diabetic peripheral neuropathy
  164. The effect of AQP4 on tau protein aggregation in neurodegeneration and persistent neuroinflammation after cerebral microinfarcts
  165. Activation of UBEC2 by transcription factor MYBL2 affects DNA damage and promotes gastric cancer progression and cisplatin resistance
  166. Analysis of clinical characteristics in proximal and distal reflux monitoring among patients with gastroesophageal reflux disease
  167. Exosomal circ-0020887 and circ-0009590 as novel biomarkers for the diagnosis and prediction of short-term adverse cardiovascular outcomes in STEMI patients
  168. Upregulated microRNA-429 confers endometrial stromal cell dysfunction by targeting HIF1AN and regulating the HIF1A/VEGF pathway
  169. Bibliometrics and knowledge map analysis of ultrasound-guided regional anesthesia
  170. Knockdown of NUPR1 inhibits angiogenesis in lung cancer through IRE1/XBP1 and PERK/eIF2α/ATF4 signaling pathways
  171. D-dimer trends predict COVID-19 patient’s prognosis: A retrospective chart review study
  172. WTAP affects intracranial aneurysm progression by regulating m6A methylation modification
  173. Using of endoscopic polypectomy in patients with diagnosed malignant colorectal polyp – The cross-sectional clinical study
  174. Anti-S100A4 antibody administration alleviates bronchial epithelial–mesenchymal transition in asthmatic mice
  175. Prognostic evaluation of system immune-inflammatory index and prognostic nutritional index in double expressor diffuse large B-cell lymphoma
  176. Prevalence and antibiogram of bacteria causing urinary tract infection among patients with chronic kidney disease
  177. Reactive oxygen species within the vaginal space: An additional promoter of cervical intraepithelial neoplasia and uterine cervical cancer development?
  178. Identification of disulfidptosis-related genes and immune infiltration in lower-grade glioma
  179. A new technique for uterine-preserving pelvic organ prolapse surgery: Laparoscopic rectus abdominis hysteropexy for uterine prolapse by comparing with traditional techniques
  180. Self-isolation of an Italian long-term care facility during COVID-19 pandemic: A comparison study on care-related infectious episodes
  181. A comparative study on the overlapping effects of clinically applicable therapeutic interventions in patients with central nervous system damage
  182. Low intensity extracorporeal shockwave therapy for chronic pelvic pain syndrome: Long-term follow-up
  183. The diagnostic accuracy of touch imprint cytology for sentinel lymph node metastases of breast cancer: An up-to-date meta-analysis of 4,073 patients
  184. Mortality associated with Sjögren’s syndrome in the United States in the 1999–2020 period: A multiple cause-of-death study
  185. CircMMP11 as a prognostic biomarker mediates miR-361-3p/HMGB1 axis to accelerate malignant progression of hepatocellular carcinoma
  186. Analysis of the clinical characteristics and prognosis of adult de novo acute myeloid leukemia (none APL) with PTPN11 mutations
  187. KMT2A maintains stemness of gastric cancer cells through regulating Wnt/β-catenin signaling-activated transcriptional factor KLF11
  188. Evaluation of placental oxygenation by near-infrared spectroscopy in relation to ultrasound maturation grade in physiological term pregnancies
  189. The role of ultrasonographic findings for PIK3CA-mutated, hormone receptor-positive, human epidermal growth factor receptor-2-negative breast cancer
  190. Construction of immunogenic cell death-related molecular subtypes and prognostic signature in colorectal cancer
  191. Long-term prognostic value of high-sensitivity cardiac troponin-I in patients with idiopathic dilated cardiomyopathy
  192. Establishing a novel Fanconi anemia signaling pathway-associated prognostic model and tumor clustering for pediatric acute myeloid leukemia patients
  193. Integrative bioinformatics analysis reveals STAT2 as a novel biomarker of inflammation-related cardiac dysfunction in atrial fibrillation
  194. Adipose-derived stem cells repair radiation-induced chronic lung injury via inhibiting TGF-β1/Smad 3 signaling pathway
  195. Real-world practice of idiopathic pulmonary fibrosis: Results from a 2000–2016 cohort
  196. lncRNA LENGA sponges miR-378 to promote myocardial fibrosis in atrial fibrillation
  197. Diagnostic value of urinary Tamm-Horsfall protein and 24 h urine osmolality for recurrent calcium oxalate stones of the upper urinary tract: Cross-sectional study
  198. The value of color Doppler ultrasonography combined with serum tumor markers in differential diagnosis of gastric stromal tumor and gastric cancer
  199. The spike protein of SARS-CoV-2 induces inflammation and EMT of lung epithelial cells and fibroblasts through the upregulation of GADD45A
  200. Mycophenolate mofetil versus cyclophosphamide plus in patients with connective tissue disease-associated interstitial lung disease: Efficacy and safety analysis
  201. MiR-1278 targets CALD1 and suppresses the progression of gastric cancer via the MAPK pathway
  202. Metabolomic analysis of serum short-chain fatty acid concentrations in a mouse of MPTP-induced Parkinson’s disease after dietary supplementation with branched-chain amino acids
  203. Cimifugin inhibits adipogenesis and TNF-α-induced insulin resistance in 3T3-L1 cells
  204. Predictors of gastrointestinal complaints in patients on metformin therapy
  205. Prescribing patterns in patients with chronic obstructive pulmonary disease and atrial fibrillation
  206. A retrospective analysis of the effect of latent tuberculosis infection on clinical pregnancy outcomes of in vitro fertilization–fresh embryo transferred in infertile women
  207. Appropriateness and clinical outcomes of short sustained low-efficiency dialysis: A national experience
  208. miR-29 regulates metabolism by inhibiting JNK-1 expression in non-obese patients with type 2 diabetes mellitus and NAFLD
  209. Clinical features and management of lymphoepithelial cyst
  210. Serum VEGF, high-sensitivity CRP, and cystatin-C assist in the diagnosis of type 2 diabetic retinopathy complicated with hyperuricemia
  211. ENPP1 ameliorates vascular calcification via inhibiting the osteogenic transformation of VSMCs and generating PPi
  212. Significance of monitoring the levels of thyroid hormone antibodies and glucose and lipid metabolism antibodies in patients suffer from type 2 diabetes
  213. The causal relationship between immune cells and different kidney diseases: A Mendelian randomization study
  214. Interleukin 33, soluble suppression of tumorigenicity 2, interleukin 27, and galectin 3 as predictors for outcome in patients admitted to intensive care units
  215. Identification of diagnostic immune-related gene biomarkers for predicting heart failure after acute myocardial infarction
  216. Long-term administration of probiotics prevents gastrointestinal mucosal barrier dysfunction in septic mice partly by upregulating the 5-HT degradation pathway
  217. miR-192 inhibits the activation of hepatic stellate cells by targeting Rictor
  218. Diagnostic and prognostic value of MR-pro ADM, procalcitonin, and copeptin in sepsis
  219. Review Articles
  220. Prenatal diagnosis of fetal defects and its implications on the delivery mode
  221. Electromagnetic fields exposure on fetal and childhood abnormalities: Systematic review and meta-analysis
  222. Characteristics of antibiotic resistance mechanisms and genes of Klebsiella pneumoniae
  223. Saddle pulmonary embolism in the setting of COVID-19 infection: A systematic review of case reports and case series
  224. Vitamin C and epigenetics: A short physiological overview
  225. Ebselen: A promising therapy protecting cardiomyocytes from excess iron in iron-overloaded thalassemia patients
  226. Aspirin versus LMWH for VTE prophylaxis after orthopedic surgery
  227. Mechanism of rhubarb in the treatment of hyperlipidemia: A recent review
  228. Surgical management and outcomes of traumatic global brachial plexus injury: A concise review and our center approach
  229. The progress of autoimmune hepatitis research and future challenges
  230. METTL16 in human diseases: What should we do next?
  231. New insights into the prevention of ureteral stents encrustation
  232. VISTA as a prospective immune checkpoint in gynecological malignant tumors: A review of the literature
  233. Case Reports
  234. Mycobacterium xenopi infection of the kidney and lymph nodes: A case report
  235. Genetic mutation of SLC6A20 (c.1072T > C) in a family with nephrolithiasis: A case report
  236. Chronic hepatitis B complicated with secondary hemochromatosis was cured clinically: A case report
  237. Liver abscess complicated with multiple organ invasive infection caused by hematogenous disseminated hypervirulent Klebsiella pneumoniae: A case report
  238. Urokinase-based lock solutions for catheter salvage: A case of an upcoming kidney transplant recipient
  239. Two case reports of maturity-onset diabetes of the young type 3 caused by the hepatocyte nuclear factor 1α gene mutation
  240. Immune checkpoint inhibitor-related pancreatitis: What is known and what is not
  241. Does total hip arthroplasty result in intercostal nerve injury? A case report and literature review
  242. Clinicopathological characteristics and diagnosis of hepatic sinusoidal obstruction syndrome caused by Tusanqi – Case report and literature review
  243. Synchronous triple primary gastrointestinal malignant tumors treated with laparoscopic surgery: A case report
  244. CT-guided percutaneous microwave ablation combined with bone cement injection for the treatment of transverse metastases: A case report
  245. Malignant hyperthermia: Report on a successful rescue of a case with the highest temperature of 44.2°C
  246. Anesthetic management of fetal pulmonary valvuloplasty: A case report
  247. Rapid Communication
  248. Impact of COVID-19 lockdown on glycemic levels during pregnancy: A retrospective analysis
  249. Erratum
  250. Erratum to “Inhibition of miR-21 improves pulmonary vascular responses in bronchopulmonary dysplasia by targeting the DDAH1/ADMA/NO pathway”
  251. Erratum to: “Fer exacerbates renal fibrosis and can be targeted by miR-29c-3p”
  252. Retraction
  253. Retraction of “Study to compare the effect of casirivimab and imdevimab, remdesivir, and favipiravir on progression and multi-organ function of hospitalized COVID-19 patients”
  254. Retraction of “circ_0062491 alleviates periodontitis via the miR-142-5p/IGF1 axis”
  255. Retraction of “miR-223-3p alleviates TGF-β-induced epithelial-mesenchymal transition and extracellular matrix deposition by targeting SP3 in endometrial epithelial cells”
  256. Retraction of “SLCO4A1-AS1 mediates pancreatic cancer development via miR-4673/KIF21B axis”
  257. Retraction of “circRNA_0001679/miR-338-3p/DUSP16 axis aggravates acute lung injury”
  258. Retraction of “lncRNA ACTA2-AS1 inhibits malignant phenotypes of gastric cancer cells”
  259. Special issue Linking Pathobiological Mechanisms to Clinical Application for cardiovascular diseases
  260. Effect of cardiac rehabilitation therapy on depressed patients with cardiac insufficiency after cardiac surgery
  261. Special issue The evolving saga of RNAs from bench to bedside - Part I
  262. FBLIM1 mRNA is a novel prognostic biomarker and is associated with immune infiltrates in glioma
  263. Special Issue Computational Intelligence Methodologies Meets Recurrent Cancers - Part III
  264. Development of a machine learning-based signature utilizing inflammatory response genes for predicting prognosis and immune microenvironment in ovarian cancer
Heruntergeladen am 3.10.2025 von https://www.degruyterbrill.com/document/doi/10.1515/med-2023-0707/html?lang=de
Button zum nach oben scrollen