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Inhibitory activities of ethanolic extracts of two macrofungi against eggs and miracidia of Fasciola spp.

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Published/Copyright: January 4, 2019
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From the journal Open Life Sciences Volume 13 Issue 1

Abstract

Fascioliasis is a disease of livestock which is now recognized as an emerging disease in humans. Cantharellus cibarius and Ganoderma applanatum are known for their medicinal properties. The use of ethanolic extracts of these macrofungi against the eggs and miracidia of Fasciola spp. is a promising method to break the parasite transmission cycle. The aim of the study is to evaluate the inhibitory effects of ethanolic extracts of the mushrooms on eggs and miracidia of Fasciola spp. Concentrated eggs and miracidia of Fasciola spp. were exposed to different concentrations (1-8 mg/ml) of extracts of Ganoderma applanatum (GEE) and Cantharellus cibarius (CEE) at different time intervals. GEE showed superior antiparasitic activities when compared to CEE at all concentrations tested. Significant positive correlations were observed between the concentration of GEE and mortality in miracidia (r=0.980, P <0.05) and CEE and mortality in miracidia (r= 0.968, P <0.05). The study showed that ethanolic extracts of G. applanatum and C. cibarius have ovicidal and miracicidal activities. While G. applanatum showed excellent activities, activities in C. cibarius were moderate. Therefore, these mushroom extracts can be regarded as promising sources of bioactive compounds that could be developed into ovicides and miracicides.

Keywords: Fasciola spp; macrofungi; ovicidal, miracicidal; inhibitory activities

1 Introduction

Infection by Fasciola spp. is endemic both in tropical and temperate regions of the world and causes significant losses in livestock production with liver condemnation and reduced carcass value estimated to exceed US$3 billion per year [1, 2]. In addition, fascioliasis is now recognized as an emerging human disease with up to 17 million estimated cases worldwide [3]. Climate change, man-made environmental modification, and resistance to anti-fascioliasis mainstay drugs are factors of epidemiological importance in the disease transmission [4, 5]. The life cycle begins when sheep or cattle ingest the encysted cercariae or metacercariae during grazing. The parasite develops into an adult in the bile ducts and lays eggs which are passed into water bodies through feces. The eggs hatch into miracidia which locate fresh water snails belonging to the genus Lymnaea for development into sporocysts. Sporocysts develop into rediae which in turn form cercariae. The later stage becomes encysted on aquatic vegetation or other surfaces.

Integrated control measures have been widely advocated as potent management strategies of fascioliasis. These may include controlled grazing, snail control, and chemotherapy. Triclabendazole, due to its efficacy against both immature and adult flukes, is the most currently used fasciolicide. Fasciolicides like albendazole, closantel, clorsulon, and rafoxanide are active against adult Fasciola but show impaired activity against young migrating stages [6].

The quest for new drug regimens is necessitated by reports of resistance of flukes to triclabendazole, a widely acclaimed and effective mainstay drug [7, 8]. Anti-fascioliasis medicinal plant research has gained considerable attention in the past years. Among the many herbs which have shown promising effects against Fasciola gigantica and F. hepatica were Allium sativum, Lawsonia inermis, Opuntia ficus, Lantana camara, Bocconia frutescens, Piper auritum, Artemisia mexicana, and Cajanus cajan [9,10]. These plants were shown to inhibit adult fluke motility and induce rupturing of internal organs such as the uterus and caeca, especially at higher concentrations [10].

Mushrooms are recognized as food items and contain diverse bioactive ingredients with nutritional and medicinal properties [11, 12]. They are recognized functional foods and can be developed into medicines and nutraceuticals [13]. Ganoderma applanatum and Cantharellus cibarius are macrofungi species with high medicinal values. These mushrooms show a wide variety of bioactivities including anti-bacterial, anti-tumor, antihypertensive, immunomodulatory, antioxidant, and anti-androgenic properties [14, 15, 16].

Very few reports are available on the anti-parasitic potentials of Cantharellus and Ganoderma macrofungi. While Cantharellus cibarius shows promising bioactivity against trypanosome [17], Ganoderna applanatum is favored against the oocyst of Eimeria species [18]. To further extend the spectrum of anti-parasitic activities of the two mushrooms, the ethanolic extracts of the two macrofungi were tested on the eggs and the immature free swimming miracidia of Fasciola spp. This is a novel approach and aims to interrupt the parasite’s transmission cycle. The aim of this study therefore was to evaluate the ovicidal and miracicidal potentials of two Nigerian edible mushrooms.

2 Materials and methods

2.1 Parasite collection

Gall bladders of cattle naturally infected with Fasciola spp. were collected between April and October of 2017 from Bodija Municipal Abattoir, Ibadan, after the animals were slaughtered. The gall bladders collected were transported to the Parasitology Laboratory, Department of Zoology, University of Ibadan, in an ice pack cooler within one hour.

2.2 Collection of Fasciola spp. eggs

The bile was aseptically transferred into centrifuge tubes and centrifuged at 2500 rpm for 5 min. The supernatant was removed, and the sediment containing eggs was washed several times using distilled water. Afterwards, the number of eggs in 2 μl of the egg suspension was examined and recorded. A small quantity (0.5 ml) of the egg suspension was transferred into a glass beaker wrapped with aluminum foil and incubated in a dark cupboard for 14 days at room temperature (26-28oC) for embryonation. The remaining eggs contained in the suspension were transferred to a clean container wrapped with aluminum foil and stored in the refrigerator at 4oC for future use [19].

2.3 Collection and identification of mushrooms

Mushroom fruiting bodies of Ganoderma applanatum and Cantharellus cibarius were collected from various locations within Kwara State, Oyo State, and Ogun State, Nigeria. The mushroom specimens were identified by a mushroom taxonomist at the Department of Botany, University of Ibadan. The choice of these macrofungi was based on earlier reports of their anti-parasitic activities [17, 18]. So we seek to further extend their spectrum of known activities against the egg and immature stage of Fasciola spp.

2.4 Mushroom extract preparation

The mushrooms were air dried, ground into powder using a milling machine, and extracted by maceration in ethanol. About 85 g of each ground mushroom sample was weighed into 700 ml of 95% ethanol in conical flasks. These were covered, shaken every 30 min for 6 h, and then allowed to stand for about 48 h. The extracts were shaken, decanted, and filtered using Whatman No. 1 filter paper. The extraction process was repeated two times with ethanol. The filtrates were combined and evaporated to dryness under reduced pressure at a maximum temperature of 40oC using a rotary evaporator. The crude extracts were stored in the refrigerator prior to use.

2.5 Preparation of mushroom extract suspension

One hundred milligrams (100 mg) of each semisolid extract was weighed and dissolved in 5 ml of 5% DMSO in distilled water to give a stock solution of 20 mg/ml. From the stock solution, final concentrations of 1, 2, 4, 6, and 8 mg/ml were prepared using the simple dilution procedure [19].

2.6 Ovicidal activity of mushroom extracts on ova of Fasciola spp

The ovicidal bioassay activity test was carried out using the in vitro Fasciola Egg Hatch Test (FEHT) assay described by Alvarez et al. [20], Fairweather et al. [21], and Canevari et al. [22]. The test was carried out in 96-well flat-bottomed plastic plates. Two microliters (2 μl) of egg suspension containing about 100 unembryonated eggs was seeded into each well, and 300 μl of each mushroom extract at varying concentrations (1, 2, 4, 6, and 8 mg/ml) was added to the wells. Albendazole (ABZ; 5 mg/ml) prepared from the dissolution of 25 mg albendazole in 5 ml of 5% DMSO distilled water was used as a positive control. ABZ was used as the positive control because of its superior efficacy against Fasciola hepatica eggs compared to other anti-Fasciola drugs [20]. The negative control comprised 5% DMSO distilled water. Each concentration and control was tested in triplicate. The eggs were then incubated in a dark cupboard for 24 h. After the 24-h exposure time, the supernatant containing extracts, ABZ, and 5% DMSO distilled water was carefully removed and replaced with 300 μl of distilled water. Following this, the eggs were incubated in darkness for 14 days at room temperature (26-28oC) for embryonation. Then eggs were exposed to incandescent (60 watt bulb) light to stimulate the hatching of miracidia. Hatched and unhatched eggs, including dead eggs, were counted under a microscope at intervals of 30, 60, 90, 120, and 150 min. Ovicidal activity was expressed based on the percentage of eggs that failed to develop and hatch [23]. It is 1 expressed as follows:

Ovicidal  activity  (%)=            (Number  of  eggs  not  hatchedTotal  number  of  hatched  and  unhatched  eggs)    ×100

2.7 Miracicidal activity of mushroom extracts on miracidia of Fasciola spp

The miracicidal bioassay test was conducted according to the method described by Obare et al. [24] although with some modifications. Fasciola eggs incubated for 14 days in a beaker in darkness were exposed to incandescent (60 watt bulb) light to stimulate miracidial hatching. After an hour, 2 μl of the distilled water containing 20 miracidia was placed in the wells and 300 μl of each mushroom extract at varying concentrations (1, 2, 4, 6, and 8 mg/ ml) was added to the wells. Albendazole (5 mg/ml) and 5% DMSO distilled water were the positive and negative controls, respectively. A triplicate was set up for each test group. Each set up was observed under the microscope at 10 min intervals for a period of one hour (10, 20, 30, 40, 50, and 60 min). Dead or immobile miracidia were enumerated and recorded. Constant motion signified that the miracidia were alive while no motion signified death.

2.8 Statistical analysis

Data were analyzed using SPSS version 18.0. (IBM, Armonk, NY, USA). Analysis of variance (ANOVA) was carried out to test for significance between treatment groups while multiple comparisons between the various treatment groups were done using Tukey’s test. The LC50 of the ethanolic mushroom extracts on parasite ova and miracidia was determined by Finney’s Probit analysis [25]. P ˂0.05 was considered statistically significant.

3 Results

The ovicidal activities of ethanolic extracts of Ganoderma applanatum (GEE) and Cantharellus cibarius (CEE) were concentration dependent (P <0.05). GEE showed superior ovicidal activity when compared to CEE at all of the concentrations tested. GEE tested at 8 mg/ml with 91.3% ovicidal activity was significantly higher than the 68.0% recorded with CEE at the same concentration (Fig. 1).

The miracicidal activity of GEE was both concentration and time dependent (P <0.05). A weak miracicidal activity (33.3%) was observed at the lowest concentration (1 mg/ml) of GEE within a 60 min maximum exposure time (Table 1). All miracidia (100.0%) were dead within 40 min in a concentration of 6 mg/ml of the mushroom extract and the positive control. A one hundred percent (100.0%) mortality was recorded in 8 mg/ml of the test extract within 30 min of exposure (Table 1). No death was recorded in in the negative control groups. A significant positive relationship was observed between the concentration of GEE and mortality (r=0.980; P <0.05), time of exposure, of and mortality of the free-swimming larval stage of Fasciola spp. (r= 0.998; P <0.05).

Table 1

Miracicidal activity of Ganoderma applanatum ethanolic extract

Conc% Mortality (±S.E.)
(mg/ml)10 min20 min30 min40 min50 min60 min
10001.7±1.7a15.0±2.9b33.3±1.7c
2003.3±1.7a10.0±2.9b26.7±4.4c45.0±2.9d
411.7±1.7a26.7±4.4ab36.7±1.7b55.0±7.6c65.0±5.0bc71.7±4.4f
628.3±1.7b58.3±8.3bc71.7±7.3c100.0±0.0d100.0±0.0d100.0±0.0d
860.0±5.8bc75.0±2.9c100.0±0.0d100.0±0.0d100.0±0.0d100.0±0.0d
ABZ65.0±5.8bc73.3±6.0c91.7±3.3d100.0±0.0d100.0±0.0d100.0±0.0d
5%DMSO0.00.00.00.00.00.0

  1. Note: Similar superscripts denote no significant difference while different superscripts denote significant difference. Significant differences were compared across various concentrations and time of miracidia exposure to GEE

Generally, CEE showed weaker miracicidal activity compared to GEE. Like with GEE, miracicidal activity varied significantly with time and concentration of CEE (P <0.05). Miracicidal activity varied significantly from a 10.0% mortality in the 1 mg/ml CEE treatment group to a 100.0% mortality in the 8 mg/ml exposed group within 60 min of exposure (P <0.05). All miracidia were observed dead within 50 min of exposure in the 8 mg/ml treatment group and within 40 min of exposure in the 5 mg/ml ABZ positive control group (Table 2). A significant positive

Table 2

Miracicidal activity of Cantharellus cibarius ethanolic extract

Conc% Mortality (±S.E.)
(mg/ml)10 min20 min30 min40 min50 min60 min
100003.3±1.7a10.0±2.9a
20001.7±1.67a11.7±4.4b21.7±4.4b
405.0±2.9a16.7±6.0a26.7±6.0b36.7±6.0c45.0±5.8c
613.3±3.3a31.7±3.3b55.0±5.0b58.3±6.0c65.0±7.6d73.3±6.0d
836.7±4.4b55.0±5.8c71.6±6.0c83.3±4.4d100.0±0.0e100.0±0.0e
ABZ65.0±5.7c73.3±6.0d91.7±3.3d100.0±0.0e100.0±0.0e100.0±0.0e
5%DMSO0.00.00.00.00.00.0

  1. Note: Similar superscripts denotes no significant differences while different superscripts denotes significant differences. Significant differences compared across concentrations and time of miracidia exposure to CEE.

Figure 1
Figure 1

correlation was observed between the concentration of CEE and mortality in miracidia (r=0.968, P <0.05), time of exposure, and mortality of miracidia (r= 0.997, P <0.05).

The lethal concentration required to prevent hatching of Fasciola eggs by 50% (LC50) decreased with time of exposure in both GEE and CEE. While the ovicidal LC50 of GEE was 7.0 mg/ml and 2.1 mg/ml in 10 min and 60 min exposure times, respectively, the ovicidal LC50s 8.6 mg/ml and 3.5 mg/ml were recorded for CEE at the same time intervals (Table 3). Lethal time (LT50), which is the time required to kill 50% of miracidia, was generally higher in the CEE than GEE exposed groups. Highest LT50s of 63.8 min and 83.1 min were recorded in 1 mg/ml GEE and CEE exposed groups, respectively. The highest concentration of 8 mg/ml recorded the lowest LT50 values of 0.2 min and 18.8 min for GEE and CEE exposed groups, respectively (Table 4).

Table 3

Ovicidal lethal concentration (LC50) of ethanolic extracts of Ganoderma applanatum (GEE) and Cantharellus cibarius (CEE)

Time (min)LC50 GEE (mg/ml)RegressionLC50 CEE (mg/ml)Regression
107.0y=0.828x-0.7818.6y=0.753x-1.454
206.3y=0.917x-0.7977.1y=0.822x-0.850
304.7y=1.076x-0.0946.5y=0.903x-0.844
403.3y=0.927x+1.9395.9y=0.757x+0.506
502.6y=0.775x+2.9764.0y=0.713x+2.152
602.1y=0.682x+3.6273.5y=0.643x+2.729
Table 4

Lethal time (LT50) of ethanolic extracts of Ganoderma applanatum (GEE) and Cantharellus cibarius (CEE)

Conc. (mg/ml)LT50 GEE (min)RegressionLT50 CEE (min)Regression
163.8y=0.108x-1.85983.1y=0.080x-1.661
256.2y=0.109x-0.11866.5y=0.101x-1.722
440.0y=0.035x+3.59152.7y=0.082x+0.687
616.1y=0.100x+3.38136.3y=0.032x+3.825
80.2y=0.076x+3.98818.8y=0.090x+3.314

4 Discussion

The increase in cases of fasciolicide resistance has necessitated the need for alternative control strategies against Fasciola infection. The adult and immature forms of the parasite found in human hosts are the ones often responsible for the problem of drug resistance. This may be largely due to the uncontrolled use of some of the mainstay anti-Fasciola drugs. The targeting of other stages of the parasite not often considered during drug sensitivity assays may offer a promising prospect in drug discovery against Fasciola spp. The use of Fasciola eggs and miracidia as the target stages for anti-Fasciola drug discovery bioassay is a welcome idea owing to these stages’ importance in the parasite transmission cycle. To the best of our knowledge, this study was the first to use extracts from mushrooms against these two stages of Fasciola. However, studies on ovicidal and miracicidal effects of medicinal plants abound. Some of the plants which have been directed against eggs of Fasciola included Nigella sativa [26], Zingiber officinale [19], Momordica charantia [27], and Moringa oleifera [28]. While many of the aforementioned studies did not consider the mechanisms of ovicidal activities of plant products, the butanol subfraction of Momordica charantia was shown to prevent hatching of miracidia through inhibition of blastogenesis [27]. Other efforts have been directed against the snail hosts of trematode infections [28, 29].

Our study showed impressive ovicidal and miracicidal activities in Cantharellus cibarius and Ganoderma applanatum, although the latter is more promising. This study suggests that the two ethanolic mushroom extracts have the potential to inhibit Fasciola embryonic development. This inhibitory effect could be the result of embryonic lysis potentiated by the extracts’ ability

to penetrate the parasite egg shell [30, 31]. Similar observations were recorded in nanotized plant product [32]. The penetrating extracts may interfere with the expression of proteins functionally involved in cellular proliferation and cytoskeleton organization during embryogenesis [33]. Disruption of the fine tegument of miracidia and probable interference with protein expression responsible for cellular functions could as well be responsible for the mortality observed in miracidia. Another possibility is the down-regulation of antioxidant enzymes such as superoxide dismutase (SOD), glutathione peroxidase (GPx), and glutathione-S-transferase (GST) responsible for defense against oxidative damage in the parasite [34]. Mechanistic studies need to be done in order to explore these propositions.

A lower ovicidal LC50 with an increase in the time of exposure is very desirable as this suggests an improvement in an extract’s activities with time. A similar phenomenon was observed in miracidia LT50 values with lower values recorded as the concentration of mushroom extract increased. Other parasites that have been shown to be sensitive to Cantharellus cibarius and Ganoderma applanatum are Leishmania donovani and Plasmodium falciparum [35], trypanosomes [17], and Eimeria spp. [18]. Some biologically active compounds present in the mushrooms have been suggested to prevent colonization of the intestine by parasites such as Eimeria spp. [18] and inhibit locomotion in flagellated parasitic protozoans such as trypanosomes [17]. Although this was not confirmed, an increase in the amount of the bioactive constituents in the ethanolic extracts of Ganoderma applanatum compared to Cantharellus cibarius could contribute to its superior ovicidal and miracicidal activities.

5 Conclusions

The present study revealed the promising ovicidal and miracicidal activities of the ethanolic extracts of Ganoderma applanatum and Cantharellus cibarius on Fasciola spp. eggs and miracidia. When compared to the efficacy of other drugs or extracts from natural sources used by other studies, the ethanolic extract of Ganoderma applanatum can be considered to have an excellent ovicidal and miracicidal potency similar to that of albendazole, which is currently used fasciolicide. On the other hand, the ethanolic extract of Cantharellus cibarius can be said to have moderate ovicidal and high miracicidal potency. Therefore, these mushroom extracts can be regarded as promising sources of bioactive compounds that could be developed into ovicide and miracicide thereby offering cheap, effective, less toxic, and environmentally friendly alternatives to synthetic drugs for the control of fascioliasis in endemic areas. It is therefore recommended that isolation of the bioactive compounds responsible for the ovicidal and miracicidal activities present in the fruiting bodies of the mushrooms be carried out. Follow up in vivo controlled studies to ascertain the therapeutic potential of Ganoderma applanatum and Cantharellus cibarius ethanolic extracts in treating Fasciola spp. infection are also recommended.

  1. Conflict of interest: Authors state no conflict of interest

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Received: 2018-09-01
Accepted: 2018-10-31
Published Online: 2019-01-04

© 2018 Somtochukwu C. Nwofor et al., published by De Gruyter

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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https://doi.org/10.1515/biol-2018-0060
Keywords for this article
Fasciola spp; macrofungi; ovicidal, miracicidal; inhibitory activities
Creative Commons
BY-NC-ND 4.0

Articles in the same Issue

  1. Research Article
  2. Purification of Tea saponins and Evaluation of its Effect on Alcohol Dehydrogenase Activity
  3. Runt-related transcription factor 3 promoter hypermethylation and gastric cancer risk: A meta-analysis
  4. Risk Factors for Venous Thromboembolism in Hospitalized Patients in the Chinese Population
  5. Value of Dual-energy Lung Perfusion Imaging Using a Dual-source CT System for the Pulmonary Embolism
  6. A new combination of substrates: biogas production and diversity of the methanogenic microorganisms
  7. mTOR modulates CD8+ T cell differentiation in mice with invasive pulmonary aspergillosis
  8. Direct Effects on Seed Germination of 17 Tree Species under Elevated Temperature and CO2 Conditions
  9. Role of water soluble vitamins in the reduction diet of an amateur sportsman
  10. Aberrant DNA methylation involved in obese women with systemic insulin resistance
  11. 16S ribosomal RNA-based gut microbiome composition analysis in infants with breast milk jaundice
  12. Characterization of Haemophilus parasuis Serovar 2 CL120103, a Moderately Virulent Strain in China
  13. MiRNA-145 induces apoptosis in a gallbladder carcinoma cell line by targeting DFF45
  14. Telmisartan induces osteosarcoma cells growth inhibition and apoptosis via suppressing mTOR pathway
  15. Optimizing the Formulation for Ginkgolide B Solid Dispersion
  16. Determination of the In Vitro Gas Production and Potential Feed Value of Olive, Mulberry and Sour Orange Tree Leaves
  17. Factors Influencing the Successful Isolation and Expansion of Aging Human Mesenchymal Stem Cells
  18. The Value of Diffusion-Weighted Magnetic Resonance Imaging in Predicting the Efficacy of Radiation and Chemotherapy in Cervical Cancer
  19. Chemical profile and antioxidant activity of Trollius europaeus under the influence of feeding aphids
  20. SSR Markers Suitable for Marker Assisted Selection in Sunflower for Downy Mildew Resistance
  21. A Fibroblast Growth Factor Antagonist Peptide Inhibits Breast Cancer in BALB/c Mice
  22. Antihyperglycemic and antihyperlipidemic effects of low-molecular-weight carrageenan in rats
  23. Microbial indicators and environmental relationships in the Umhlangane River, Durban, South Africa
  24. TUFT1 promotes osteosarcoma cell proliferation and predicts poor prognosis in osteosarcoma patients
  25. Long non-coding RNA-2271 promotes osteogenic differentiation in human bone marrow stem cells
  26. The prediction of cardiac events in patients with acute ST segment elevation myocardial infarction: A meta–analysis of serum uric acid
  27. Risk expansion of Cr through amphibious clonal plant from polluted aquatic to terrestrial habitats
  28. Overexpression of Zinc Finger Transcription Factor ZAT6 Enhances Salt Tolerance
  29. Sini decoction intervention on atherosclerosis via PPARγ-LXRα-ABCA1 pathway in rabbits
  30. Soluble myeloid triggering receptor expressed on myeloid cell 1 might have more diagnostic value for bacterial ascites than C-reactive protein
  31. A Preliminary Study on the Newly Isolated High Laccase-producing Fungi: Screening, Strain Characteristics and Induction of Laccase Production
  32. Hydrolytic Enzyme Production by Thermophilic Bacteria Isolated from Saudi Hot Springs
  33. Analysis of physiological parameters of Desulfovibrio strains from individuals with colitis
  34. Emodin promotes apoptosis of human endometrial cancer through regulating the MAPK and PI3K/ AKT pathways
  35. Down-regulation of miR-539 indicates poor prognosis in patients with pancreatic cancer
  36. Inhibitory activities of ethanolic extracts of two macrofungi against eggs and miracidia of Fasciola spp.
  37. PAQR6 expression enhancement suggests a worse prognosis in prostate cancer patients
  38. Characterization of a potential ripening regulator, SlNAC3, from Solanum lycopersicum
  39. Expression of Angiopoietin and VEGF in cervical cancer and its clinical significance
  40. Umbilical Cord Tissue Derived Mesenchymal Stem Cells Can Differentiate into Skin Cells
  41. Isolation and Characterization of a Phage to Control Vancomycin Resistant Enterococcus faecium
  42. Glycogen Phosphorylase Isoenzyme Bb, Myoglobin and BNP in ANT-Induced Cardiotoxicity
  43. BAG2 overexpression correlates with growth and poor prognosis of esophageal squamous cell carcinoma
  44. Relationship between climate trends and grassland yield across contrasting European locations
  45. Review Articles
  46. Mechanisms of salt tolerance in halophytes: current understanding and recent advances
  47. Salivary protein roles in oral health and as predictors of caries risk
  48. Nanoparticles as carriers of proteins, peptides and other therapeutic molecules
  49. Survival mechanisms to selective pressures and implications
  50. Up-regulation of key glycolysis proteins in cancer development
  51. Communications
  52. In vitro plant regeneration of Zenia insignis Chun
  53. DNA barcoding of online herbal supplements: crowd-sourcing pharmacovigilance in high school
  54. Case Reports
  55. Management of myasthenia gravis during pregnancy: A report of eight cases
  56. Three Cases of Extranodal Rosai-Dorfman Disease and Literature Review
  57. Letters to the Editor
  58. First report of Chlamydia psittaci seroprevalence in black-headed gulls (Larus ridibundus) at Dianchi Lake, China
  59. Special Issue on Agricultural and Biological Sciences - Part II
  60. Chemical composition of essential oil in Mosla chinensis Maxim cv. Jiangxiangru and its inhibitory effect on Staphylococcus aureus biofilm formation
  61. Secondary metabolites of Antarctic fungi antagonistic to aquatic pathogenic bacteria
  62. Study of Seizure-Manifested Hartnup Disorder Case Induced by Novel Mutations in SLC6A19
  63. Transcriptome analysis of Pinus massoniana Lamb. microstrobili during sexual reversal
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  65. Methylation pattern polymorphism of cyp19a in Nile tilapia and hybrids
  66. A Method of Biomedical Information Classification based on Particle Swarm Optimization with Inertia Weight and Mutation
  67. A novel TNNI3 gene mutation (c.235C>T/ p.Arg79Cys) found in a thirty-eight-year-old women with hypertrophic cardiomyopathy
  68. Remote Sensing-Based Extraction and Analysis of Temporal and Spatial Variations of Winter Wheat Planting Areas in the Henan Province of China
  69. Topical Issue on Precision Medicine
  70. Serum sTREM-1, PCT, CRP, Lac as biomarkers for death risk within 28 days in patients with severe sepsis
  71. IL-17 gene rs3748067 C>T polymorphism and gastric cancer risk: A meta-analysis
  72. Efficacy of Danhong injection on serum concentration of TNF-α, IL-6 and NF-κB in rats with intracerebral hemorrhage
  73. An ensemble method to predict target genes and pathways in uveal melanoma
  74. Evaluation of the quality of CT images acquired with smart metal artifact reduction software
  75. NPM1A in plasma is a potential prognostic biomarker in acute myeloid leukemia
  76. Arterial infusion of rapamycin in the treatment of rabbit hepatocellular carcinoma to improve the effect of TACE
  77. New progress in understanding the cellular mechanisms of anti-arrhythmic drugs
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