Home A novel GNAS mutation in pseudohypoparathyroidism type 1a with articular flexion deformity: A case report
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A novel GNAS mutation in pseudohypoparathyroidism type 1a with articular flexion deformity: A case report

  • Jinxing Wan , Dongjuan He , Jun Xie EMAIL logo and Zhizhi Chen EMAIL logo
Published/Copyright: July 24, 2024

Abstract

Pseudohypoparathyroidism (PHP) type 1a (PHP 1a) is a rare hereditary disorder characterized by target organ resistance to hormonal signaling and the Albright hereditary osteodystrophy (AHO) phenotype, which features round facial features, short fingers, subcutaneous calcifications, short stature, obesity, and intellectual disability. Progressive osseous heteroplasia (POH) is another rare disorder characterized by heterotopic ossification (HO) that progressively affects skin, subcutaneous tissues, and deep skeletal muscle. PHP 1a is inherited maternally due to a GNAS mutation, while pure POH is inherited paternally. This case study presented a Chinese boy with congenital hypothyroidism, tonic-clonic seizures, hypoparathyroidism, AHO, POH, and joint fixation deformity. Sequencing analysis of GNAS-Gsα revealed a heterozygous C.432+2T>C(P.?) variant (NM_000516.7) affecting the canonical splice donor site of intron 5 in the boy and his mother, indicating maternal inheritance of a GNAS mutation. The patient was diagnosed with POH overlap syndrome (POH/PHP 1a). Following calcium and calcitriol supplementation, he experienced a reduction in seizures, and surgery was performed to correct the joint fixation deformity caused by HO. This case report provided valuable insights into the genotype-phenotype correlations of POH overlap syndrome and underscored the significance of genetic testing in diagnosing rare diseases.

1 Introduction

Pseudohypoparathyroidism (PHP) and related disorders, collectively known as inactivating parathyroid hormone (PTH)-related peptide (PTH/PTHrP) signaling disorders (iPPSD), are rare conditions caused by genetic or epigenetic defects at the GNAS complex locus on chromosome 20q13.3, which impair the function of the stimulatory G protein (Gsα) or lead to abnormal Gsα expression and other splice variants [1]. The global prevalence of PHP remains unclear, but it is estimated to be 1.2/100,000 in Japan, 1/150,000 in Italy, 1.1/100,000 in Denmark, and 1/20,000 in the United States [2,3]. Genetic testing can help exclude other potential illnesses when diagnosing PHP. Albright hereditary osteodystrophy (AHO), a disorder caused by GNAS inactivation, is characterized by a round face, small digits, short stature, subcutaneous calcifications, and mental impairment. Progressive osseous heteroplasia (POH) is characterized by progressive heterotopic ossifications (HOs) of the dermis, skeletal muscle, and deep connective tissues [4]. Fixed flexion deformity is a rare juvenile deformity that is seldom documented in PHP cases as a deformity resulting from subcutaneous calcification. It is uncommon to encounter generalized calcinosis in children that leads to a fixed flexion deformity. This case study presented a rare case of a boy with clinical features of POH overlap syndrome (POH/PHP 1a) and a GNAS-inactivating mutation. The case underscored the significance of genetic testing in diagnosing rare diseases such as this and provided insights into the clinical characteristics of POH and PHP 1a (Figures 14).

Figure 1 
               ECG result of the patient. The sensitivity of the ECG machine was 10 mm/mV. The speed of the report paper was 25 mm/s.
Figure 1

ECG result of the patient. The sensitivity of the ECG machine was 10 mm/mV. The speed of the report paper was 25 mm/s.

Figure 2 
               The left-hand X-ray result of the patient.
Figure 2

The left-hand X-ray result of the patient.

Figure 3 
               The three-dimensional reconstruction image (a) and the CT image (b and c) of the right knee joint of the patient showed multiple calcifications.
Figure 3

The three-dimensional reconstruction image (a) and the CT image (b and c) of the right knee joint of the patient showed multiple calcifications.

Figure 4 
               The head CT scan image (a–c) of the patient showed multiple calcifications.
Figure 4

The head CT scan image (a–c) of the patient showed multiple calcifications.

1.1 Case report

The 12-year-old male patient in this case had a history of congenital hypothyroidism and was treated with levothyroxine tablets from birth. Despite normal academic achievement, the patient’s growth and development were delayed compared to his peers. At 12 years and 5 months of age, he experienced a generalized tonic-clonic seizure and was admitted to the hospital. His parents were not consanguineous in marriage. Physical examination revealed several clinical characteristics of AHO, including a round face, short stature, short third and fourth fingers and subcutaneous calcifications. The patient also exhibited a fixed right ankle joint, plantar flexion deformity, and right heel deformity, as well as right ankle and popliteal fossa hyperextension and a tendon contracture that prevented the right heel from touching the ground during walking. Results from the nervous system and cardiovascular exams were unremarkable. As shown in Table 1, laboratory findings showed extremely low corrected serum calcium concentrations at 1.03 mmol/L (2.1–2.7 mmol/L), serum phosphorus concentrations of 2.45 mmol/L (0.83–1.48 mmol/L), and serum magnesium concentrations of 0.76 mmol/L (0.70–1.15 mmol/L), PTH of 249.40 pg/mL (12–65 pg/mL), serum vitamin D level of 17.74 ng/mL (30–100 ng/mL), thyrotropin (TSH) of 7.408 μIU/mL (0.35–4.94 μIU/mL), FT4 of 10.17 pmol/L (9.01–19.05 pmol/L), alkaline phosphatase of 351.3 U/L (34–121 U/L), white blood cell count of 2.4 × 109/µL (4–10 × 109/µL), and an elevated serum creatine kinase of 921.7 U/L (22–269 U/L). The electrocardiogram (ECG) in this case showed sinus rhythm along with a prolonged corrected QT interval of 482 ms, which is a sign of hypocalcemia. The left-hand X-ray revealed brachydactyly of the third and fourth fingers, which is a common feature of AHO. Computed tomography (CT) of the right lower limb showed ectopic calcification extending from the gastrocnemius space of the upper segment of the right leg to the rear of the knee joint, indicating POH. Multiple calcifications were visible on the head CT scan in the basal ganglia, soft tissues underneath the scalp, and both frontal lobes on either side, which is a common manifestation of AHO. Clinical signs of AHO included the patient’s round face, short neck, brachydactyly of the third and fourth digits, subcutaneous calcification, low calcium, and increased PTH. The patient also had a history of congenital hypothyroidism. Laboratory analysis revealed the clinical PTH levels, indicating a diagnosis of PHP. Genetic testing confirmed that the patient had PHP 1a due to a GNAS gene intron5 splicing mutation chr20:57478848 C.432+2T>CP.? (NM_000516.7 (Figure 5a). The patient’s mother had the same genetic mutation (Figure 5b) but did not exhibit AHO clinical signs or laboratory abnormalities, with a height of 140 cm and a weight of 37.2 kg, as well as normal levels of calcium, phosphorus, TSH, T3, T4, PTH, and sex hormone. His father’s genetic test was normal (Figure 5c). Calcium and calcitriol supplementation improved the patient’s symptoms. Following treatment, the patient’s seizures abated and he remained asymptomatic during his hospital stay. His adjusted calcium level was 1.83 mmol/L, which was within the normal range, but his PTH level remained high at 189 pg/mL at follow-up 1 week after discharge. As his subcutaneous calcification did not improve, surgery was performed. Postoperative pathology confirmed extensive ectopic ossification lesions in the soft tissues of the lower leg and fibrous adipose tissue with ossification (Figure 6).

Table 1

The results of laboratory tests of the patient, compared to the normal reference range

Laboratory results Patient values Normal reference range
White blood cell count(103/µL) 2.4 4–10
Hemoglobin (g/dL) 11.6 12–15
Platelet count (103/µL) 273 150–400
Urea (mmol/L) 3.5 2.76–8.07
Creatinine (µmol/L) 48 53–97
Sodium (mmol/L) 141.1 135–145
Potassium (mmol/L) 3.96 3.5–5.3
Chloride (mmol/L) 98.8 95–105
Glucose (mmol/L) 4.4 3.3–5.5
C-reactive protein (mg/L) <5 0–5
Vitamin D (ng/mL) 17.74 low 30–100
Albumin (g/L) 47 35–50
Corrected calcium(mmol/L) 1.20 low 2.1–2.7
Phosphorus (mmol/L) 2.45 high 0.83–1.48
Magnesium (mmol/L) 0.76 0.70–1.15
Alkaline phosphatase (U/L) 351.3 34–121
Creatine kinase (U/L) 921.7 22–269
Myoglobin (ng/mL) 48 25–58
Parathyroid hormone (pg/mL) 249.40 high 12–65
Free triiodothyronine (nmol/L) 3.17 2.63–5.70
Free thyroxine (nmol/L) 10.17 9.01–19.05
Thyroid-stimulating hormone (μIU/mL) 7.408 high 0.350–4.940
Figure 5 
                  (a) Genetic test result of the patient showed splicing mutation GNAS C.432+2T>CP.?. The red arrow points to the mutation site. (b) Genetic test result of the patient’s mother. (c) Genetic test result of the patient’s father.
Figure 5

(a) Genetic test result of the patient showed splicing mutation GNAS C.432+2T>CP.?. The red arrow points to the mutation site. (b) Genetic test result of the patient’s mother. (c) Genetic test result of the patient’s father.

Figure 6 
                  Postoperative pathology images of the soft tissues and fibroadipose tissues in lower leg of the patient.
Figure 6

Postoperative pathology images of the soft tissues and fibroadipose tissues in lower leg of the patient.

  1. Informed consent: Informed consent has been obtained from all individuals included in this study.

  2. Ethical approval: The research related to human use has been complied with all the relevant national regulations, institutional policies, and in accordance with the tenets of the Helsinki Declaration and has been approved by the Ethics Committee of Quzhou People’s Hospital according to the Helsinki Declaration.

2 Discussion and conclusions

The PTH signaling pathway deficiency in PHP is classified into three types: PHP 1, PHP 2, and pseudopseudohypoparathyroidism (PPHP). PHP 1 is further subdivided into three distinct subtypes: 1a, 1b, and 1c. PHP 1a is caused by maternal GNAS exons 1–13 mutations that result in characteristic abnormalities known as AHO and are associated with resistance to G protein-coupled receptors (GPCRs) [5]. PPHP, on the other hand, is caused by paternal GNAS mutations in exons that also cause most of these AHO features, but without evidence of hormonal resistance (Table 2).

Table 2

Clinical and biochemical characteristics of PHP 1a and PPHP

Consequences of mutations PHP 1a PPHP
GNAS mutations Maternal Paternal
Resistance at GPCRs Yes Rare cases with mild hormonal resistance
Serum calcium and phosphorus Hypocalcemia and hyperphosphatemia Normal
AHO Yes Yes
PHO Rare Yes
Birth weights Close to average Low

Legend: GPCRs (G protein-coupled receptors), AHO (Albright hereditary osteodystrophy), POH (progressive osseous heteroplasia).

The patient in this case exhibited resistance to both thyroid hormone and PTH, was born with congenital hypothyroidism, and now has PTH resistance. Ectopic calcifications are common in patients with AHO, particularly in the subcutaneous tissue and brain parenchyma, with the most common manifestation of calcification in the basal ganglia of the brain. However, it remains unclear whether intracranial calcification is the underlying cause of seizures in PHP patients. Recent studies [6] suggest that intracranial calcification is not a reliable etiological cause of epilepsy in PHP patients; dysfunction of GPCR signaling pathways and a reduction of serum calcium may underlie the etiology of seizures in PHP. The molecular cause of GNAS-associated HO is still unclear, but recent studies have shown that GNAS inactivation can regulate the differentiation and function of not only osteoblasts but also osteoclasts and osteocytes [7,8]. GNAS inactivation leads to heterotopic bone formation within subcutaneous tissue by changing the connective tissue microenvironment, thereby promoting osteogenic differentiation of tissue-resident mesenchymal progenitors. Both the sonic hedgehog and hippo signaling pathways contribute to HO formation [7,8]. Most AHO-related heterotopic bone develops through intramembranous bone formation and is limited to the dermis and subcutaneous tissue. However, in rare cases with Gsα mutations, ossification progresses to the deep connective tissue and skeletal muscle, a condition known as POH. Both PHP 1a and POH are caused by heterozygous inactivating mutations in the GNAS gene, with POH-like progressive and prominent ectopic calcification mostly caused by paternal GNAS mutations. In this case, CT of the patient’s lower extremity showed ectopic calcification and ossification in the tissue, suggesting POH, which significantly restricted joint movement and led to the development of a fixed flexion deformity of the patient’s right ankle joint. Differential diagnoses were also made for the patient’s joint fixation, mainly including chronic arthritis, post-traumatic injury, pseudoarthrosis, and soft tissue calcification. Currently, there has been no effective treatment for HO, but nonsteroidal anti-inflammatory drugs and local irradiation may be helpful in preventing HO, whereas surgical therapy to excise existing HO is limited by a high frequency of recurrence and complications. Surgical resection of the HO may be recommended for patients with severe or lamellar heterotopic calcifications in deep tissue or high-pressure loaded joints, and bisphosphonates can be utilized to limit postoperative recurrence of HO because they have the ability to effectively suppress bone turnover. This patient developed intracranial calcification and deep tissue ossification, resulting in the joint fixation and flexion deformity. His HO and joint fixation deformity were treated by surgery, and the pathological results of the postoperative tissue confirmed the patient’s HO. Inhibition of Yes-associated protein-Sonic hedgehog may be a promising therapeutic strategy for treating HO [7].

There are only a few case reports of POH overlap syndrome with PHP 1a [9,10,11,12,13] (Table 3), and the mechanism underlying this overlap syndrome remains unclear. Genetic variation, epigenetic modifications, and environmental factors may contribute to POH overlap syndrome. Several GNAS mutations have been reported to lead to POH overlap syndrome with PHP 1a, including the donor splice site in intron 5 C.432+2T>G of GNAS, which was first identified in a patient with iPPSD2 [14]. However, little is known about how this splice site mutation can lead to iPPSD2. The case presented in this report showed a heterozygous C.432+2T>C(P.?) variant in the boy and his mother, suggesting maternal inheritance of the GNAS mutation. As the rarity of POH/PHP 1a, further studies of the GNAS heterozygous mutation C.432+2T>C may reveal the factors involved in POH overlap syndrome.

Table 3

Clinical and molecular characteristics of cases of PHP 1a with POH-like phenotype reported in the literature

Pt ID Gender Age of onset/diagnosis GNAS mutation position AHO Ectopic calcification Hormone resistance patterns Familial transmission/mutated allele
1 [9] F 6 months/7 years no Yes Arms, abdomen, legs, and right foot rPTH/rTSH De novo/maternal
2 [10] M 4 months/16 months c.546del exon7 Yes Lower limbs, buttocks, and back rPTH/rTSH De novo/maternal
3 [11] M Postnatal/1 year c.85 > T Yes Cervical, truncular, arms TSH( ND) rPTH De novo/maternal
4 [12] F 6 months/3 years c.568_571del exon7 Yes Heterotopic ossification rPTH/rTSH Inherited/maternal
5 [13] M Postnatal/13 years 6 months p.D189MfsTer14 No Left floor and right hand rPTH/rTSH De novo/maternal

Legend: M (male), F (female), rPTH (parathyroid hormone resistance), rTSH (thyroid-stimulating hormone resistance), AHO (Albright hereditary osteodystrophy), ND (not determined), de novo (no parental inheritance).

In conclusion, we presented a rare case of POH overlap syndrome with a maternal GNAS mutation, congenital hypothyroidism, tonic-clonic seizures, AHO features, deep ectopic ossification, and joint fixation deformity. Further studies of POH and PHP 1a cases will help us to have a better understanding of POH overlap syndrome.


# These authors contributed equally to this article.


Acknowledgments

The authors thank physicians and patient and his family who participated in the study.

  1. Funding information: Authors state no funding involved.

  2. Author contributions: J.W. and Z.C. designed and wrote the paper. J.X. performed an operation on the patient. D.H. gave valuable reviewing work for the manuscript. All authors have read and approved the manuscript.

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

  4. Data availability statement: Data sharing is not applicable to this article as no datasets were generated or analyzed during the current study.

References

[1] Jüppner H. Pseudohypoparathyroidism: complex disease variants with unfortunate names. J Mol Endocrinol. 2023;72(1):e230104.Search in Google Scholar

[2] Takatani R, Kubota T, Minagawa M, Inoue D, Fukumoto S, Ozono K, et al. Prevalence of pseudohypoparathyroidism and nonsurgical hypoparathyroidism in Japan in 2017: A Nationwide Survey. J Epidemiol. 2023;33(11):569–73.Search in Google Scholar

[3] Del Sindaco G, Berkenou J, Pagnano A, Rothenbuhler A, Arosio M, Mantovani G, et al. Neonatal and early infancy features of patients with inactivating PTH/PTHrP signaling disorders/pseudohypoparathyroidism. J Clin Endocrinol Metab. 2023;108(11):2961–9.Search in Google Scholar

[4] Elli FM, Mantovani G. Pseudohypoparathyroidism, acrodysostosis, progressive osseous heteroplasia: different names for the same spectrum of diseases? Endocrine. 2021;72(3):611–8.Search in Google Scholar

[5] Jüppner H. Molecular definition of pseudohypoparathyroidism variants. J Clin Endocrinol Metab. 2021;106(6):1541–52.Search in Google Scholar

[6] Qi Z, Li Z, Gao Q, Dong L, Lin J, Peng K, et al. Characterizing cerebral imaging and electroclinical features of five pseudohypoparathyroidism cases presenting with epileptic seizures. Behav Neurol. 2022;2022:8710989.Search in Google Scholar

[7] Cong Q, Liu Y, Zhou T, Zhou Y, Xu R, Cheng C, et al. A self-amplifying loop of YAP and SHH drives formation and expansion of heterotopic ossification. Sci Transl Med. 2021;13(599):eabb2233.Search in Google Scholar

[8] McMullan P, Germain-Lee EL. Aberrant bone regulation in albright hereditary osteodystrophy dueto gnas inactivation: mechanisms and translational implications. Curr Osteoporos Rep. 2022;20(1):78–89.Search in Google Scholar

[9] Eddy MC, Jan de Beur SM, Yandow SM, McAlister WH, Shore EM, Kaplan FS, et al. Deficiency of the alpha-subunit of the stimulatory G protein and severe extraskeletal ossification. J Bone Miner Res. 2000;15(11):2074–83.Search in Google Scholar

[10] Gelfand IM, Hub RS, Shore EM, Kaplan FS, Dimeglio LA. Progressive osseous heteroplasia-like heterotopic ossification in a male infant with pseudohypoparathyroidism type Ia: a case report. Bone. 2007;40(5):1425–8.Search in Google Scholar

[11] Lebrun M, Richard N, Abeguilé G, David A, Coëslier Dieux A, Journel H, et al. Progressive osseous heteroplasia: a model for the imprinting effects of GNAS inactivating mutations in humans. J Clin Endocrinol Metab. 2010;95(6):3028–38.Search in Google Scholar

[12] Elli FM, deSanctis L, Ceoloni B, Barbieri AM, Bordogna P, Beck-Peccoz P, et al. Pseudohypoparathyroidism type Ia and pseudo-pseudohypoparathyroidism: the growing spectrum of GNAS inactivating mutations. Hum Mutat. 2013 Mar;34(3):411–6.Search in Google Scholar

[13] Ozaki K, Mituboshi A, Nagai M, Nishiyama A, Nishimura G, Morisada N, et al. Mild progressive osseous heteroplasia overlap syndrome with PTH and TSH resistance appearing during adolescence and not early childhood. Endocrine. 2021 Dec;74(3):685–9.Search in Google Scholar

[14] Le Norcy E, Reggio-Paquet C, de Kerdanet M, Mignot B, Rothenbuhler A, Chaussain C, et al. Dental and craniofacial features associated with GNAS loss of function mutations. Eur J Orthod. 2020;42(5):525–33.Search in Google Scholar

Received: 2024-02-07
Revised: 2024-06-11
Accepted: 2024-06-13
Published Online: 2024-07-24

© 2024 the author(s), published by De Gruyter

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

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  111. Heterogeneous nuclear ribonucleoprotein K is a potential target for enhancing the chemosensitivity of nasopharyngeal carcinoma
  112. PHB2 alleviates retinal pigment epithelium cell fibrosis by suppressing the AGE–RAGE pathway
  113. Anti-γ-aminobutyric acid-B receptor autoimmune encephalitis with syncope as the initial symptom: Case report and literature review
  114. Comparative analysis of chloroplast genome of Lonicera japonica cv. Damaohua
  115. Human umbilical cord mesenchymal stem cells regulate glutathione metabolism depending on the ERK–Nrf2–HO-1 signal pathway to repair phosphoramide mustard-induced ovarian cancer cells
  116. Electroacupuncture on GB acupoints improves osteoporosis via the estradiol–PI3K–Akt signaling pathway
  117. Renalase protects against podocyte injury by inhibiting oxidative stress and apoptosis in diabetic nephropathy
  118. Review: Dicranostigma leptopodum: A peculiar plant of Papaveraceae
  119. Combination effect of flavonoids attenuates lung cancer cell proliferation by inhibiting the STAT3 and FAK signaling pathway
  120. Renal microangiopathy and immune complex glomerulonephritis induced by anti-tumour agents: A case report
  121. Correlation analysis of AVPR1a and AVPR2 with abnormal water and sodium and potassium metabolism in rats
  122. Gastrointestinal health anti-diarrheal mixture relieves spleen deficiency-induced diarrhea through regulating gut microbiota
  123. Myriad factors and pathways influencing tumor radiotherapy resistance
  124. Exploring the effects of culture conditions on Yapsin (YPS) gene expression in Nakaseomyces glabratus
  125. Screening of prognostic core genes based on cell–cell interaction in the peripheral blood of patients with sepsis
  126. Coagulation factor II thrombin receptor as a promising biomarker in breast cancer management
  127. Ileocecal mucinous carcinoma misdiagnosed as incarcerated hernia: A case report
  128. Methyltransferase like 13 promotes malignant behaviors of bladder cancer cells through targeting PI3K/ATK signaling pathway
  129. The debate between electricity and heat, efficacy and safety of irreversible electroporation and radiofrequency ablation in the treatment of liver cancer: A meta-analysis
  130. ZAG promotes colorectal cancer cell proliferation and epithelial–mesenchymal transition by promoting lipid synthesis
  131. Baicalein inhibits NLRP3 inflammasome activation and mitigates placental inflammation and oxidative stress in gestational diabetes mellitus
  132. Impact of SWCNT-conjugated senna leaf extract on breast cancer cells: A potential apoptotic therapeutic strategy
  133. MFAP5 inhibits the malignant progression of endometrial cancer cells in vitro
  134. Major ozonated autohemotherapy promoted functional recovery following spinal cord injury in adult rats via the inhibition of oxidative stress and inflammation
  135. Axodendritic targeting of TAU and MAP2 and microtubule polarization in iPSC-derived versus SH-SY5Y-derived human neurons
  136. Differential expression of phosphoinositide 3-kinase/protein kinase B and Toll-like receptor/nuclear factor kappa B signaling pathways in experimental obesity Wistar rat model
  137. The therapeutic potential of targeting Oncostatin M and the interleukin-6 family in retinal diseases: A comprehensive review
  138. BA inhibits LPS-stimulated inflammatory response and apoptosis in human middle ear epithelial cells by regulating the Nf-Kb/Iκbα axis
  139. Role of circRMRP and circRPL27 in chronic obstructive pulmonary disease
  140. Investigating the role of hyperexpressed HCN1 in inducing myocardial infarction through activation of the NF-κB signaling pathway
  141. Characterization of phenolic compounds and evaluation of anti-diabetic potential in Cannabis sativa L. seeds: In vivo, in vitro, and in silico studies
  142. Quantitative immunohistochemistry analysis of breast Ki67 based on artificial intelligence
  143. Ecology and Environmental Science
  144. Screening of different growth conditions of Bacillus subtilis isolated from membrane-less microbial fuel cell toward antimicrobial activity profiling
  145. Degradation of a mixture of 13 polycyclic aromatic hydrocarbons by commercial effective microorganisms
  146. Evaluation of the impact of two citrus plants on the variation of Panonychus citri (Acari: Tetranychidae) and beneficial phytoseiid mites
  147. Prediction of present and future distribution areas of Juniperus drupacea Labill and determination of ethnobotany properties in Antalya Province, Türkiye
  148. Population genetics of Todarodes pacificus (Cephalopoda: Ommastrephidae) in the northwest Pacific Ocean via GBS sequencing
  149. A comparative analysis of dendrometric, macromorphological, and micromorphological characteristics of Pistacia atlantica subsp. atlantica and Pistacia terebinthus in the middle Atlas region of Morocco
  150. Macrofungal sporocarp community in the lichen Scots pine forests
  151. Assessing the proximate compositions of indigenous forage species in Yemen’s pastoral rangelands
  152. Food Science
  153. Gut microbiota changes associated with low-carbohydrate diet intervention for obesity
  154. Reexamination of Aspergillus cristatus phylogeny in dark tea: Characteristics of the mitochondrial genome
  155. Differences in the flavonoid composition of the leaves, fruits, and branches of mulberry are distinguished based on a plant metabolomics approach
  156. Investigating the impact of wet rendering (solventless method) on PUFA-rich oil from catfish (Clarias magur) viscera
  157. Non-linear associations between cardiovascular metabolic indices and metabolic-associated fatty liver disease: A cross-sectional study in the US population (2017–2020)
  158. Knockdown of USP7 alleviates atherosclerosis in ApoE-deficient mice by regulating EZH2 expression
  159. Utility of dairy microbiome as a tool for authentication and traceability
  160. Agriculture
  161. Enhancing faba bean (Vicia faba L.) productivity through establishing the area-specific fertilizer rate recommendation in southwest Ethiopia
  162. Impact of novel herbicide based on synthetic auxins and ALS inhibitor on weed control
  163. Perspectives of pteridophytes microbiome for bioremediation in agricultural applications
  164. Fertilizer application parameters for drip-irrigated peanut based on the fertilizer effect function established from a “3414” field trial
  165. Improving the productivity and profitability of maize (Zea mays L.) using optimum blended inorganic fertilization
  166. Application of leaf multispectral analyzer in comparison to hyperspectral device to assess the diversity of spectral reflectance indices in wheat genotypes
  167. Animal Sciences
  168. Knockdown of ANP32E inhibits colorectal cancer cell growth and glycolysis by regulating the AKT/mTOR pathway
  169. Development of a detection chip for major pathogenic drug-resistant genes and drug targets in bovine respiratory system diseases
  170. Exploration of the genetic influence of MYOT and MB genes on the plumage coloration of Muscovy ducks
  171. Transcriptome analysis of adipose tissue in grazing cattle: Identifying key regulators of fat metabolism
  172. Comparison of nutritional value of the wild and cultivated spiny loaches at three growth stages
  173. Transcriptomic analysis of liver immune response in Chinese spiny frog (Quasipaa spinosa) infected with Proteus mirabilis
  174. Disruption of BCAA degradation is a critical characteristic of diabetic cardiomyopathy revealed by integrated transcriptome and metabolome analysis
  175. Plant Sciences
  176. Effect of long-term in-row branch covering on soil microorganisms in pear orchards
  177. Photosynthetic physiological characteristics, growth performance, and element concentrations reveal the calcicole–calcifuge behaviors of three Camellia species
  178. Transcriptome analysis reveals the mechanism of NaHCO3 promoting tobacco leaf maturation
  179. Bioinformatics, expression analysis, and functional verification of allene oxide synthase gene HvnAOS1 and HvnAOS2 in qingke
  180. Water, nitrogen, and phosphorus coupling improves gray jujube fruit quality and yield
  181. Improving grape fruit quality through soil conditioner: Insights from RNA-seq analysis of Cabernet Sauvignon roots
  182. Role of Embinin in the reabsorption of nucleus pulposus in lumbar disc herniation: Promotion of nucleus pulposus neovascularization and apoptosis of nucleus pulposus cells
  183. Revealing the effects of amino acid, organic acid, and phytohormones on the germination of tomato seeds under salinity stress
  184. Combined effects of nitrogen fertilizer and biochar on the growth, yield, and quality of pepper
  185. Comprehensive phytochemical and toxicological analysis of Chenopodium ambrosioides (L.) fractions
  186. Impact of “3414” fertilization on the yield and quality of greenhouse tomatoes
  187. Exploring the coupling mode of water and fertilizer for improving growth, fruit quality, and yield of the pear in the arid region
  188. Metagenomic analysis of endophytic bacteria in seed potato (Solanum tuberosum)
  189. Antibacterial, antifungal, and phytochemical properties of Salsola kali ethanolic extract
  190. Exploring the hepatoprotective properties of citronellol: In vitro and in silico studies on ethanol-induced damage in HepG2 cells
  191. Enhanced osmotic dehydration of watermelon rind using honey–sucrose solutions: A study on pre-treatment efficacy and mass transfer kinetics
  192. Effects of exogenous 2,4-epibrassinolide on photosynthetic traits of 53 cowpea varieties under NaCl stress
  193. Comparative transcriptome analysis of maize (Zea mays L.) seedlings in response to copper stress
  194. An optimization method for measuring the stomata in cassava (Manihot esculenta Crantz) under multiple abiotic stresses
  195. Fosinopril inhibits Ang II-induced VSMC proliferation, phenotype transformation, migration, and oxidative stress through the TGF-β1/Smad signaling pathway
  196. Antioxidant and antimicrobial activities of Salsola imbricata methanolic extract and its phytochemical characterization
  197. Bioengineering and Biotechnology
  198. Absorbable calcium and phosphorus bioactive membranes promote bone marrow mesenchymal stem cells osteogenic differentiation for bone regeneration
  199. New advances in protein engineering for industrial applications: Key takeaways
  200. An overview of the production and use of Bacillus thuringiensis toxin
  201. Research progress of nanoparticles in diagnosis and treatment of hepatocellular carcinoma
  202. Bioelectrochemical biosensors for water quality assessment and wastewater monitoring
  203. PEI/MMNs@LNA-542 nanoparticles alleviate ICU-acquired weakness through targeted autophagy inhibition and mitochondrial protection
  204. Unleashing of cytotoxic effects of thymoquinone-bovine serum albumin nanoparticles on A549 lung cancer cells
  205. Erratum
  206. Erratum to “Investigating the association between dietary patterns and glycemic control among children and adolescents with T1DM”
  207. Erratum to “Activation of hypermethylated P2RY1 mitigates gastric cancer by promoting apoptosis and inhibiting proliferation”
  208. Retraction
  209. Retraction to “MiR-223-3p regulates cell viability, migration, invasion, and apoptosis of non-small cell lung cancer cells by targeting RHOB”
  210. Retraction to “A data mining technique for detecting malignant mesothelioma cancer using multiple regression analysis”
  211. Special Issue on Advances in Neurodegenerative Disease Research and Treatment
  212. Transplantation of human neural stem cell prevents symptomatic motor behavior disability in a rat model of Parkinson’s disease
  213. Special Issue on Multi-omics
  214. Inflammasome complex genes with clinical relevance suggest potential as therapeutic targets for anti-tumor drugs in clear cell renal cell carcinoma
  215. Gastroesophageal varices in primary biliary cholangitis with anti-centromere antibody positivity: Early onset?
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