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Korasick DA, Buckley DP, Palpacelli A, Cursio I, Cesaroni E, Cheng J, Tanner JJ. Biochemical, structural, and computational analyses of two new clinically identified missense mutations of ALDH7A1. Chem Biol Interact 2024; 394:110993. [PMID: 38604394 DOI: 10.1016/j.cbi.2024.110993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/30/2024] [Accepted: 04/04/2024] [Indexed: 04/13/2024]
Abstract
Aldehyde dehydrogenase 7A1 (ALDH7A1) catalyzes a step of lysine catabolism. Certain missense mutations in the ALDH7A1 gene cause pyridoxine dependent epilepsy (PDE), a rare autosomal neurometabolic disorder with recessive inheritance that affects almost 1:65,000 live births and is classically characterized by recurrent seizures from the neonatal period. We report a biochemical, structural, and computational study of two novel ALDH7A1 missense mutations that were identified in a child with rare recurrent seizures from the third month of life. The mutations affect two residues in the oligomer interfaces of ALDH7A1, Arg134 and Arg441 (Arg162 and Arg469 in the HGVS nomenclature). The corresponding enzyme variants R134S and R441C (p.Arg162Ser and p.Arg469Cys in the HGVS nomenclature) were expressed in Escherichia coli and purified. R134S and R441C have 10,000- and 50-fold lower catalytic efficiency than wild-type ALDH7A1, respectively. Sedimentation velocity analytical ultracentrifugation shows that R134S is defective in tetramerization, remaining locked in a dimeric state even in the presence of the tetramer-inducing coenzyme NAD+. Because the tetramer is the active form of ALDH7A1, the defect in oligomerization explains the very low catalytic activity of R134S. In contrast, R441C exhibits wild-type oligomerization behavior, and the 2.0 Å resolution crystal structure of R441C complexed with NAD+ revealed no obvious structural perturbations when compared to the wild-type enzyme structure. Molecular dynamics simulations suggest that the mutation of Arg441 to Cys may increase intersubunit ion pairs and alter the dynamics of the active site gate. Our biochemical, structural, and computational data on two novel clinical variants of ALDH7A1 add to the complexity of the molecular determinants underlying pyridoxine dependent epilepsy.
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Affiliation(s)
- David A Korasick
- Department of Biochemistry, University of Missouri, Columbia, MO, 65211, United States
| | - David P Buckley
- Department of Biochemistry, University of Missouri, Columbia, MO, 65211, United States
| | | | - Ida Cursio
- Child Neurology and Psychiatric Unit, Pediatric Hospital G. Salesi, United Hospitals of Marche, Ancona, Italy
| | - Elisabetta Cesaroni
- Child Neurology and Psychiatric Unit, Pediatric Hospital G. Salesi, United Hospitals of Marche, Ancona, Italy
| | - Jianlin Cheng
- Department of Electrical Engineering and Computer Science, University of Missouri, Columbia, MO, 65211, United States
| | - John J Tanner
- Department of Biochemistry, University of Missouri, Columbia, MO, 65211, United States; Department of Chemistry, University of Missouri, Columbia, MO, 65211, United States.
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Xiao J, Dong Y, Jin J, Yuan Z, Wang C, Xiang R, Guo Y. A missense variant in MYOF is associated with ARVC and sudden cardiac death. Gene 2024; 902:148193. [PMID: 38253296 DOI: 10.1016/j.gene.2024.148193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/22/2023] [Accepted: 01/18/2024] [Indexed: 01/24/2024]
Abstract
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is rare autosomal dominant genetic disorder that leads to severe arrhythmia and sudden cardiac death. Although previous studies in clinical, pathological and genetics of ARVC established consensus diagnostic criteria and expanded the spectrum of pathogenic genes, there is still a proportion of patients with unclear causative factors. Here, whole-exome sequencing was employed to investigate the genetic etiology of a 15-year-old sudden cardiac death female caused by ARVC. A novel variant of MYOF (NM_013451.3: c.4723G > C: p.D1575H) was identified, which is a member of the Ferlin family of proteins is associated with cardiomyopathy. And the bioinformatics analysis predicted the pathogenicity of this variant. We report the first variant of MYOF in ARVC, which imply a vital role of MYOF in cardiomyopathy.
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Affiliation(s)
- Jiao Xiao
- Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha, China.
| | - Yi Dong
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China.
| | - Jieyuan Jin
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China.
| | - Zhuangzhuang Yuan
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China.
| | - Chenyu Wang
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China.
| | - Rong Xiang
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China.
| | - Yadong Guo
- Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha, China.
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Tan RL, Sciandra F, Hübner W, Bozzi M, Reimann J, Schoch S, Brancaccio A, Blaess S. Missense mutation (C667F) in murine β-dystroglycan causes embryonic lethality, myopathy and blood-brain barrier destabilization. Dis Model Mech 2024:dmm.050594. [PMID: 38616731 DOI: 10.1242/dmm.050594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 04/08/2024] [Indexed: 04/16/2024] Open
Abstract
Dystroglycan (DG) is an extracellular matrix receptor consisting of an α- and a β-DG subunit encoded by the DAG1 gene. The homozygous mutation (c.2006G>T, p.Cys669Phe) in β-DG causes Muscle-Eye-Brain disease with multicystic leukodystrophy in humans. In a mouse model of this primary dystroglycanopathy, approximately two-thirds of homozygous embryos fail to develop to term. Mutant mice that are born undergo a normal postnatal development but show a late-onset myopathy with partially penetrant histopathological changes and an impaired performance on an activity wheel. Their brains and eyes are structurally normal, but the localization of mutant β-DG is altered in the glial perivascular endfeet resulting in a perturbed protein composition of the blood-brain and blood-retina barrier. In addition, α- and β-DG protein levels are significantly reduced in muscle and brain of mutant mice. Due to the partially penetrant developmental phenotype of the C669F-β-DG mice, they represent a novel and highly valuable mouse model to study the molecular effects of β-DG functional alterations both during embryogenesis and in mature muscle, brain and eye, and to gain insight into the pathogenesis of primary dystroglycanopathies.
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Affiliation(s)
- Rui Lois Tan
- Neurodevelopmental Genetics, Institute of Reconstructive Neurobiology, Medical Faculty, University of Bonn, 53127 Bonn, Germany
| | - Francesca Sciandra
- Institute of Chemical Sciences and Technologies "Giulio Natta" (SCITEC)-CNR, Rome, Italy
| | - Wolfgang Hübner
- Biomolecular Photonics, Faculty of Physics, Bielefeld University, 33615 Bielefeld, Germany
| | - Manuela Bozzi
- Institute of Chemical Sciences and Technologies "Giulio Natta" (SCITEC)-CNR, Rome, Italy
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie. Sezione di Biochimica. Università Cattolica del Sacro Cuore di Roma, 00168 Rome, Italy
| | - Jens Reimann
- Department of Neurology, Neuromuscular Diseases Section, University Hospital Bonn, 53127 Bonn, Germany
| | - Susanne Schoch
- Synaptic Neuroscience Team, Institute of Neuropathology, Medical Faculty, University of Bonn, 53127 Bonn, Germany
| | - Andrea Brancaccio
- Institute of Chemical Sciences and Technologies "Giulio Natta" (SCITEC)-CNR, Rome, Italy
- School of Biochemistry, University Walk, University of Bristol, Bristol BS8 1TD, UK
| | - Sandra Blaess
- Neurodevelopmental Genetics, Institute of Reconstructive Neurobiology, Medical Faculty, University of Bonn, 53127 Bonn, Germany
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Bhor S, Tonny SH, Dinesh S, Sharma S. Computational screening of damaging nsSNPs in human SOD1 genes associated with amyotrophic lateral sclerosis identifies destabilising effects of G38R and G42D mutations through in silico evaluation. In Silico Pharmacol 2024; 12:20. [PMID: 38559706 PMCID: PMC10973320 DOI: 10.1007/s40203-024-00191-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 01/14/2024] [Indexed: 04/04/2024] Open
Abstract
Amyotrophic lateral sclerosis (ALS), a complicated neurodegenerative disorder affected by hereditary and environmental variables, is a condition. In this study, the genetic makeup of ALS is investigated, with a focus on the SOD1 gene's single-nucleotide polymorphisms (SNPs) and their ability to affect disease risk. Eleven high-risk missense variations that may impair the functionality of the SOD1 protein were discovered after a thorough examination of SNPs in the SOD1 gene. These mutations were chosen using a variety of prediction approaches, highlighting their importance in the aetiology of ALS. Notably, it was discovered that the stability of the SOD1 wild-type protein structure was compromised by the G38R and G42D SOD1 variants. Additionally, Edaravone, a possible ALS medication, showed a greater affinity for binding mutant SOD1 structures, pointing to potential personalised treatment possibilities. The high-risk SNPs discovered in this investigation seem to have functional effects, especially on the stability of proteins and their interactions with other molecules. This study clarifies the complex genetics of ALS and offers insights into how these genetic variations may affect the effectiveness of therapeutic interventions, particularly in the context of edaravone. In this study advances our knowledge of the genetic mechanisms causing ALS vulnerability and prospective therapeutic strategies. Future studies are necessary to confirm these results and close the gap between individualised clinical applications and improved ALS care.
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Affiliation(s)
- Samiksha Bhor
- Department of Bioinformatics, BioNome, Bengaluru, Karnataka 560043 India
| | - Sadia Haque Tonny
- Department of Plant Pathology, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh, 2202 Bangladesh
| | - Susha Dinesh
- Department of Bioinformatics, BioNome, Bengaluru, Karnataka 560043 India
| | - Sameer Sharma
- Department of Bioinformatics, BioNome, Bengaluru, Karnataka 560043 India
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Faraji H, Ebrahim-Habibi A. Structural insights into the pathogenicity of point mutations in human acyl-CoA dehydrogenase homotetramers. J Biol Phys 2024; 50:89-118. [PMID: 38103157 PMCID: PMC10864237 DOI: 10.1007/s10867-023-09650-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 11/21/2023] [Indexed: 12/17/2023] Open
Abstract
Acyl-CoA dehydrogenase deficiency (ACAD) is an inherited and potentially fatal disorder with variable clinical symptoms. The relationship between pathogenicity and deleterious point mutations is investigated here in ACAD structures of short (SCAD) and medium-chain (MCAD) types. Structures and dynamic features of native and mutant forms of enzymes models were compared. A total of 2.88 µs molecular dynamics simulations were performed at four different temperatures. Total energy, RMSD, protein ligand interactions and affinity, RMSF measures, secondary structure changes, and important interactions were studied. Mutations in the three main domains of ACADs are pathogenic, while those located at linker turns are not. Mutations affect mostly tetramer formations, secondary structures, and many contacts and interactions. In R206H (MCAD mutant) which is experimentally known to cause a huge turnover decrease, the lack of a single H-bond between substrate and FAD was observed. Secondary structures showed temperature-dependent changes, and SCAD activity was found to be highly correlated to the enzyme helix 3-10 content. Finally, RMSF patterns pointed to one important loop that maintains the substrate close to the active site and is a cause of substrate wobbling upon mutation. Despite similar structure, function, and cellular location, SCAD and MCAD may have different optimum temperatures that are related to the structure taken at that specific temperature. In conclusion, new insight has been provided on the effect of various SCAD and MCAD pathogenic mutations on the structure and dynamical features of the enzymes.
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Affiliation(s)
- Homa Faraji
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Azadeh Ebrahim-Habibi
- Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Chamran Highway, Jalal-Al-Ahmad Street, Tehran, 1411713137, Iran.
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Ju Y, Chen T, Ruan L, Zhao Y, Chang Q, Huang X. Mutations in TSPAN12 gene causing familial exudative vitreoretinopathy. Hum Genomics 2024; 18:22. [PMID: 38424652 PMCID: PMC10905792 DOI: 10.1186/s40246-024-00589-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 02/22/2024] [Indexed: 03/02/2024] Open
Abstract
BACKGROUND To report newly found TSPAN12 mutations with a unique form of familial exudative vitreoretinopathy (FEVR) and find out the possible mechanism of a repeated novel intronic variant in TSPAN12 led to FEVR. RESULTS Nine TSPAN12 mutations with a unique form of FEVR were detected by panel-based NGS. MINI-Gene assay showed two splicing modes of mRNA that process two different bands A and B, and mutant-type shows replacement with the splicing mode of Exon11 hopping. Construction of wild-type and mutant TSPAN12 vector showed the appearance of premature termination codons (PTC). In vitro expression detection showed significant down-regulated expression level of TSPAN12 mRNAs and proteins in cells transfected with mutant vectors compared with in wild-type group. On the contrary, translation inhibitor CHX and small interfering RNA of UPF1 (si-UPF1) significantly increased mRNA or protein expression of TSPAN12 in cells transfected with the mutant vectors. CONCLUSIONS Nine mutations in TSPAN12 gene are reported in 9 FEVR patients with a unique series of ocular abnormalities. The three novel TSPAN12 mutations trigger NMD would cause the decrease of TSPAN12 proteins that participate in biosynthesis and assembly of microfibers, which might lead to FEVR, and suggest that intronic sequence analysis might be a vital tool for genetic counseling and prenatal diagnoses.
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Affiliation(s)
- Yuqiao Ju
- Department of Ophthalmology and Vision Science, Eye and ENT Hospital of Fudan University, 83 Fenyang Rd, Shanghai, 200031, China
- Key Laboratory of Myopia of State Health Ministry, and Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| | - Tianhui Chen
- Department of Ophthalmology and Vision Science, Eye and ENT Hospital of Fudan University, 83 Fenyang Rd, Shanghai, 200031, China
- Key Laboratory of Myopia of State Health Ministry, and Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| | - Lu Ruan
- Department of Ophthalmology and Vision Science, Eye and ENT Hospital of Fudan University, 83 Fenyang Rd, Shanghai, 200031, China
- Key Laboratory of Myopia of State Health Ministry, and Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| | - Ye Zhao
- Department of Ophthalmology and Vision Science, Eye and ENT Hospital of Fudan University, 83 Fenyang Rd, Shanghai, 200031, China
- Key Laboratory of Myopia of State Health Ministry, and Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| | - Qing Chang
- Department of Ophthalmology and Vision Science, Eye and ENT Hospital of Fudan University, 83 Fenyang Rd, Shanghai, 200031, China.
- Key Laboratory of Myopia of State Health Ministry, and Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China.
| | - Xin Huang
- Department of Ophthalmology and Vision Science, Eye and ENT Hospital of Fudan University, 83 Fenyang Rd, Shanghai, 200031, China.
- Key Laboratory of Myopia of State Health Ministry, and Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China.
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Jamshidi Parvar S, Hall BA, Shorthouse D. Interpreting the effect of mutations to protein binding sites from large-scale genomic screens. Methods 2024; 222:122-132. [PMID: 38185227 DOI: 10.1016/j.ymeth.2023.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 11/27/2023] [Accepted: 12/22/2023] [Indexed: 01/09/2024] Open
Abstract
Predicting the functionality of missense mutations is extremely difficult. Large-scale genomic screens are commonly performed to identify mutational correlates or drivers of disease and treatment resistance, but interpretation of how these mutations impact protein function is limited. One such consequence of mutations to a protein is to impact its ability to bind and interact with partners or small molecules such as ATP, thereby modulating its function. Multiple methods exist for predicting the impact of a single mutation on protein-protein binding energy, but it is difficult in the context of a genomic screen to understand if these mutations with large impacts on binding are more common than statistically expected. We present a methodology for taking mutational data from large-scale genomic screens and generating functional and statistical insights into their role in the binding of proteins both with each other and their small molecule ligands. This allows a quantitative and statistical analysis to determine whether mutations impacting protein binding or ligand interactions are occurring more or less frequently than expected by chance. We achieve this by calculating the potential impact of any possible mutation and comparing an expected distribution to the observed mutations. This method is applied to examples demonstrating its ability to interpret mutations involved in protein-protein binding, protein-DNA interactions, and the evolution of therapeutic resistance.
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Affiliation(s)
| | - Benjamin A Hall
- UCL Department of Medical Physics and Biomedical Engineering, Mallet Place Engineering Building, University College London, Gower Street, London WC1E 6BT, UK
| | - David Shorthouse
- UCL School of Pharmacy, 29-39 Brunswick Square, London WC1N 1AX, UK.
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Xu N, Zheng L, Dai Z, Zhu J, Xie P, Yang S, Chen F. A novel missense mutation (FGG c.1168G > T) in the gamma chain of fibrinogen causing congenital hypodysfibrinogenemia with bleeding phenotype. Hereditas 2024; 161:4. [PMID: 38233949 PMCID: PMC10795222 DOI: 10.1186/s41065-024-00308-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 01/02/2024] [Indexed: 01/19/2024] Open
Abstract
BACKGROUND Fibrinogen plays pivotal roles in multiple biological processes. Genetic mutation of the fibrinogen coding genes can result in congenital fibrinogen disorders (CFDs). We identified a novel heterozygous missense mutation, FGG c.1168G > T (NCBI NM_000509.6), and conducted expression studies and functional analyses to explore the influence on fibrinogen synthesis, secretion, and polymerization. METHODS Coagulation tests were performed on the patients to detect the fibrinogen concentration. Whole-exome sequencing (WES) and Sanger sequencing were employed to detect the novel mutation. Recombinant fibrinogen-producing Chinese hamster ovary (CHO) cell lines were built to examine the recombinant fibrinogen synthesis and secretion by western blotting and enzyme-linked immunosorbent assay (ELISA). The functional analysis of fibrinogen was performed by thrombin-catalyzed fibrin polymerization assay. In silico molecular analyses were carried out to elucidate the potential molecular mechanisms. RESULTS The clinical manifestations, medical history, and laboratory tests indicated the diagnosis of hypodysfibrinogenemia with bleeding phenotype in two patients. The WES and Sanger sequencing revealed that they shared the same heterozygous missense mutation, FGG c.1168G > T. In the expression studies and functional analysis, the missense mutation impaired the recombinant fibrinogen's synthesis, secretion, and polymerization. Furthermore, the in silico analyses indicated novel mutation led to the hydrogen bond substitution. CONCLUSION The study highlighted that the novel heterozygous missense mutation, FGG c.1168G > T, would change the protein secondary structure, impair the "A: a" interaction, and consequently deteriorate the fibrinogen synthesis, secretion, and polymerization.
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Affiliation(s)
- Nuo Xu
- Department of Spine Surgery, the Second Xiangya Hospital, Central South University, Changsha, China
| | - Liping Zheng
- Department of Nephrology, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou, China
| | - Zhehao Dai
- Department of Spine Surgery, the Second Xiangya Hospital, Central South University, Changsha, China
| | - Jun Zhu
- Department of Minimally Invasive Orthopedics, The Hunan University of Medicine General Hospital, Huaihua, China
| | - Peng Xie
- Department of Spine Surgery, the Second Xiangya Hospital, Central South University, Changsha, China
| | - Shun Yang
- Department of Spine Surgery, the Second Xiangya Hospital, Central South University, Changsha, China
| | - Fei Chen
- Department of Spine Surgery, the Second Xiangya Hospital, Central South University, Changsha, China.
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Ying L, Ding Y, Li J, Zhang Q, Chang G, Yu T, Wang J, Zhu Z, Wang X. Clinical characteristics and genetic analysis of a child with specific type of diabetes mellitus caused by missense mutation of GATA6 gene. Zhejiang Da Xue Xue Bao Yi Xue Ban 2023; 52:732-737. [PMID: 38105674 PMCID: PMC10764185 DOI: 10.3724/zdxbyxb-2023-0351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 11/09/2023] [Indexed: 12/19/2023]
Abstract
A 2-year-old boy was admitted to Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine in Nov 30th, 2018, due to polydipsia, polyphagia, polyuria accompanied with increased glucose levels for more than 2 weeks. He presented with symmetrical short stature [height 81 cm (-2.2 SD), weight 9.8 kg (-2.1 SD), body mass index 14.94 kg/m2 (P10-P15)], and with no special facial or physical features. Laboratory results showed that the glycated hemoglobin A1c was 14%, the fasting C-peptide was 0.3 ng/mL, and the islet autoantibodies were all negative. Oral glucose tolerance test showed significant increases in both fasting and postprandial glucose, but partial islet functions remained (post-load C-peptide increased 1.43 times compared to baseline). A heterozygous variant c.1366C>T (p.R456C) was detected in GATA6 gene, thereby the boy was diagnosed with a specific type of diabetes mellitus. The boy had congenital heart disease and suffered from transient hyperosmolar hyperglycemia after a patent ductus arteriosus surgery at 11 months of age. Insulin replacement therapy was prescribed, but without regular follow-up thereafter. The latest follow-up was about 3.5 years after the diagnosis of diabetes when the child was 5 years and 11 months old, with the fasting blood glucose of 6.0-10.0 mmol/L, and the 2 h postprandial glucose of 17.0-20.0 mmol/L.
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Affiliation(s)
- Lingwen Ying
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China.
| | - Yu Ding
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Juan Li
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Qianwen Zhang
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Guoying Chang
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China.
- Clinical Research Ward, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China.
| | - Tingting Yu
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Jian Wang
- Central Laboratory, International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Zhongqun Zhu
- Department of Cardiothoracic Surgery, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Xiumin Wang
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China.
- Clinical Research Ward, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China.
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Nicotera AG, Amore G, Saia MC, Vinci M, Musumeci A, Chiavetta V, Federico C, Spoto G, Saccone S, Di Rosa G, Calì F. Fibroblast Growth Factor Receptor 2 (FGFR2), a New Gene Involved in the Genesis of Autism Spectrum Disorder. Neuromolecular Med 2023; 25:650-656. [PMID: 37733178 PMCID: PMC10721674 DOI: 10.1007/s12017-023-08759-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 09/04/2023] [Indexed: 09/22/2023]
Abstract
Autism spectrum disorder (ASD) is a long-known complex neurodevelopmental disorder, and over the past decades, with the enhancement of the research genomic techniques, has been the object of intensive research activity, and many genes involved in the development and functioning of the central nervous system have been related to ASD genesis. Herein, we report a patient with severe ASD carrying a G > A de novo variant in the FGFR2 gene, determining a missense mutation. FGFR2 encodes for the ubiquitous fibroblast growth factor receptor (FGFR) type 2, a tyrosine kinase receptor implicated in several biological processes. The mutated version of this protein is known to be responsible for several variable overlapping syndromes. Even if there still is only sparse and anecdotal data, recent research highlighted a potential role of FGFR2 on neurodevelopment. Our findings provide new insights into the potential causative role of FGFR2 gene in complex neurodevelopmental disorders.
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Affiliation(s)
- Antonio Gennaro Nicotera
- Department of Human Pathology of the Adult and Developmental Age, "Gaetano Barresi", University of Messina, Via Consolare Valeria 1, 98125, Messina, Italy
| | - Greta Amore
- Department of Human Pathology of the Adult and Developmental Age, "Gaetano Barresi", University of Messina, Via Consolare Valeria 1, 98125, Messina, Italy
| | - Maria Concetta Saia
- Department of Human Pathology of the Adult and Developmental Age, "Gaetano Barresi", University of Messina, Via Consolare Valeria 1, 98125, Messina, Italy
| | - Mirella Vinci
- Oasi Research Institute-IRCCS, Via Conte Ruggero 73, 94018, Troina, Italy
| | - Antonino Musumeci
- Oasi Research Institute-IRCCS, Via Conte Ruggero 73, 94018, Troina, Italy
| | - Valeria Chiavetta
- Oasi Research Institute-IRCCS, Via Conte Ruggero 73, 94018, Troina, Italy
| | - Concetta Federico
- Department Biological, Geological and Environmental Sciences, University of Catania, Via Androne 81, 95124, Catania, Italy
| | - Giulia Spoto
- Department of Biomedical Sciences, Dental Sciences and Morpho-Functional Imaging, University of Messina, Via Consolare Valeria 1, 98125, Messina, Italy
| | - Salvatore Saccone
- Department Biological, Geological and Environmental Sciences, University of Catania, Via Androne 81, 95124, Catania, Italy.
| | - Gabriella Di Rosa
- Department of Biomedical Sciences, Dental Sciences and Morpho-Functional Imaging, University of Messina, Via Consolare Valeria 1, 98125, Messina, Italy
| | - Francesco Calì
- Oasi Research Institute-IRCCS, Via Conte Ruggero 73, 94018, Troina, Italy
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Kwon HJ, Yoo DW, Yoon JH, Kim N, Kim KH. Missense Variant c.3301C>T (p.R1101W) in von Willebrand Factor A Sequence in a Patient with Recessive Dystrophic Epidermolysis Bullosa Pruriginosa with Compound Heterozygous COL7A1 Variants. Ann Dermatol 2023; 35:S195-S200. [PMID: 38061702 PMCID: PMC10727861 DOI: 10.5021/ad.21.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 11/23/2021] [Accepted: 01/12/2022] [Indexed: 12/20/2023] Open
Abstract
Dystrophic epidermolysis bullosa (DEB) pruriginosa is a rare subtype of DEB characterized by multiple, violaceous, and severe pruritic lichenified nodules along with blisters. Here, we report the case of a Korean male who, since the age of 3 years, had multiple pruritic nodules with blisters on both lower extremities. Genetic testing is required to diagnose DEB pruriginosa because its clinical and histologic features are inconclusive. We identified compound heterozygous COL7A1 variants of c.5797C>T (p.R1933*) and c.3301C>T (p.R1101W) in the patient, leading to a diagnosis of recessive DEB pruriginosa. Among the variants identified, c.3301C>T is a novel missense variant that has not been reported previously. This variant is in exon 26, which encodes von Willebrand factor A (vWFA) in collagen type VII. vWFA is known to preserve normal dermal structures by interacting with dermal collagens and basement membranes. Considering that this variant contradicts the general concept that autosomal dominant inheritance is more common and that variants typically occur in the triple helical collagenous domain of COL7A1 in DEB pruriginosa, we focus on the rarity of this case and the possible pathogenic role of the c.3301C>T (p.R1101W) variant.
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Affiliation(s)
- Hyeok-Jin Kwon
- Department of Dermatology, College of Medicine, Dong-A University, Busan, Korea
| | - Dong-Wha Yoo
- Department of Dermatology, College of Medicine, Dong-A University, Busan, Korea
| | - Jung-Ho Yoon
- Department of Dermatology, College of Medicine, Dong-A University, Busan, Korea
| | - Namhee Kim
- Department of Laboratory Medicine, College of Medicine, Dong-A University, Busan, Korea
| | - Ki-Ho Kim
- Department of Dermatology, College of Medicine, Dong-A University, Busan, Korea.
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Kim M, Kim J, Seo AN, Jeong JY, Park NJY, Chong GO, Hong DG, Park JY. Comparison of immunohistochemistry and next-generation sequencing results in oncogenic PTEN missense mutations. Pathol Res Pract 2023; 251:154879. [PMID: 37862920 DOI: 10.1016/j.prp.2023.154879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Accepted: 10/06/2023] [Indexed: 10/22/2023]
Abstract
BACKGROUND Phosphatase and tensin homolog (PTEN) is one of the most frequently mutated tumor suppressor genes in malignant tumors. Oncogenic PTEN mutations have diagnostic, prognostic, and therapeutic implications. Similar to TP53 mutations, oncogenic PTEN mutations can result from nonsynonymous missense mutations. However, there has been no detailed study on the immunostaining pattern of oncogenic PTEN missense mutations. METHODS We retrospectively selected 18 cancers (13 endometrial cancers, 2 brain tumors, 1 ovarian cancer, 1 lung cancer, and 1 cancer of unknown origin) harboring oncogenic PTEN missense mutations, which were confirmed by targeted next-generation sequencing. PTEN immunohistochemistry was conducted for all cases, and the results were compared with sequencing results. RESULTS The immunostaining results of PTEN missense mutations revealed a diverse pattern depending on the site of mutation and co-occurring mutation. The most frequent oncogenic PTEN mutations were R130G (4/18, 22.2 %) and R130Q (3/18, 16.7 %). Eleven cases harbored PTEN missense mutations only, whereas the remaining seven cases harbored PTEN truncating mutations and PTEN missense mutations. Complete loss of cytoplasmic expression were found in five cases, of which three had missense mutation only. PTEN R130 residue mutation alone did not showed altered PTEN immunostaining pattern in this study. CONCLUSIONS PTEN missense mutation, which comprises a portion of oncogenic PTEN mutation, can manifest as a diverse immunostaining pattern. Complementary testing using both immunostaining and next-generation sequencing should be conducted to accurately evaluate the PTEN status in malignancy.
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Affiliation(s)
- Moonsik Kim
- Department of Pathology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea
| | - Jinhee Kim
- Department of Pathology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea
| | - An Na Seo
- Department of Pathology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea
| | - Ji Yun Jeong
- Department of Pathology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea
| | - Nora Jee-Young Park
- Department of Pathology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea
| | - Gun Oh Chong
- Department of Obstetrics and Gynecology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea
| | - Dae Gy Hong
- Department of Obstetrics and Gynecology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea
| | - Ji Young Park
- Department of Pathology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea.
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Hu J, Li Y, Zhang L, Peng G, Zhang F, Zhao X. Iron overload due to SLC40A1 mutation of type 4 hereditary hemochromatosis. Med Mol Morphol 2023; 56:233-238. [PMID: 37382698 DOI: 10.1007/s00795-023-00359-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 06/12/2023] [Indexed: 06/30/2023]
Abstract
Hereditary hemochromatosis type 4 is an autosomal-dominant inherited disease characterized by a mutation in the SLC40A1 gene encoding ferroportin. This condition can be further subdivided into types 4A (loss-of-function mutations) and 4B (gain-of-function mutations). To date, only a few cases of type 4B cases have been reported, and the treatment has not been clearly mentioned. Here, we report a genotype of hereditary hemochromatosis type 4B involving the heterozygous mutation c.997 T > C (p. Tyr333His) in SLC40A1. The patient was treated with red blood cell apheresis every month for 1 year, followed by oral deferasirox, and the combined therapy was found to be effective.
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Affiliation(s)
- Jing Hu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300020, China
- Tianjin Institutes of Health Science, Tianjin, 301600, China
| | - Yuan Li
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300020, China
- Tianjin Institutes of Health Science, Tianjin, 301600, China
| | - Li Zhang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300020, China
- Tianjin Institutes of Health Science, Tianjin, 301600, China
| | - Guangxin Peng
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300020, China
- Tianjin Institutes of Health Science, Tianjin, 301600, China
| | - Fengkui Zhang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300020, China
- Tianjin Institutes of Health Science, Tianjin, 301600, China
| | - Xin Zhao
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300020, China.
- Tianjin Institutes of Health Science, Tianjin, 301600, China.
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Wang Y, Liu T, Liu J, Xiang Y, Huang L, Li J, An X, Cui S, Feng Z, Yu J. The novel compound heterozygous variants identified in a Chinese family with glucose phosphate isomerase deficiency and pathogenicity analysis. BMC Med Genomics 2023; 16:162. [PMID: 37430284 DOI: 10.1186/s12920-023-01603-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 07/05/2023] [Indexed: 07/12/2023] Open
Abstract
BACKGROUND AND AIMS Glucose phosphate isomerase (GPI) deficiency is an extremely rare autosomal recessive disorder caused by mutations in the GPI gene. In this research, the proband displaying typical manifestations of haemolytic anaemia and his family members were recruited to analyse the pathogenicity of the detected variants. METHODS Peripheral blood samples were collected from the family members and genomic DNA was extracted and targeted for capture and sequencing. The effect of the candidate pathogenic variants on splicing was further investigated using the minigene splicing system. The computer simulation was also used for further analysis of the detected data. RESULTS The proband carried the compound heterozygous variants c.633 + 3 A > G and c.295G > T in the GPI gene, which have never been reported before. In the genealogy, co-segregation of the mutant genotype with the phenotype was established. The minigene study showed that intronic mutations resulted in abnormal pre-mRNA splicing. Specifically, the two aberrant transcripts: r.546_633del and r.633 + 1_633 + 2insGT were transcribed by the minigene plasmid expressing the c.633 + 3 A > G variant. The missense mutation c.295G > T in exon 3 resulted in altering glycine at codon 87 to cysteine which was predicted to be pathogenic in an in silico analysis. Deeper analyses revealed that the Gly87Cys missense mutation led to steric hindrance. Compared to the wild-type, the mutation G87C led to a significant increase in intermolecular forces. CONCLUSION Overall, the novel compound heterozygous variants in the GPI gene contributed to the etiology of the disease. Genetic testing can assist in the diagnosis. The novel gene variants identified in the present study has further expanded the mutational spectrum of GPI deficiency, which can better guide family counselling.
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Affiliation(s)
- Yang Wang
- Department of hematology and oncology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Tao Liu
- Department of hematology and oncology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Jiaqi Liu
- Shanghai Cinopath Medical Testing Co Ltd, Shanghai, China
| | - Yan Xiang
- Department of hematology and oncology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Lan Huang
- Department of hematology and oncology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Jiacheng Li
- Department of hematology and oncology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Xizhou An
- Department of hematology and oncology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, Chongqing, China
| | | | - Zishuai Feng
- Department of Neonate, Hebei Maternity and Gynecology Hospital, Shijiazhuang, Hebei, China
| | - Jie Yu
- Department of hematology and oncology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, Chongqing, China.
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Ma Y, Bao Y, Zheng M. Epstein-Barr virus-associated B-cell lymphoproliferative disorder meeting the definition of CAEBV B cell disease: a case report. BMC Infect Dis 2023; 23:453. [PMID: 37420238 DOI: 10.1186/s12879-023-08430-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 06/28/2023] [Indexed: 07/09/2023] Open
Abstract
BACKGROUND Chronic active Epstein-Barr virus infection (CAEBV) is a systemic EBV-positive lymphoproliferative disorder (EBV-LPD) considered to be associated with a genetic immunological abnormality, although its cause is still unclear. EBV is usually detected in T cells or NK cells in CAEBV patients with only a few cases involving B cells described in East Asia, which may be due to differences in genetic and environmental factors. CASE DESCRIPTION A 16-year-old boy who seemed to be diagnosed as CAEBV of B cell type was studied. The patient had IM-like symptoms persisting for more than 3 months, high levels of EBV DNA in the PB, and positive EBER in situ hybridization in B cells. In addition, to exclude underlying genetic disorders, we performed next-generation sequencing (NGS) and whole-exome sequencing (WES), which identified the missense mutation in PIK3CD (E1021K), ADA (S85L) and CD3D (Q140K) in the patient while no same genetic mutation was detected in his parents and sister. However, there is no diagnosis of CAEBV of B cell type in the most recent World Health Organization classification of tumors of hematopoietic and lymphoid tissues, therefore we finally diagnosed this patient as EBV-B-LPD. CONCLUSIONS This study shows a rare case of a patient meeting the definition of CAEBV B-cell disease in East Asia. Meanwhile, the case indicates that the missense mutation and the disease are related.
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Affiliation(s)
- Yaxian Ma
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Immunotherapy Research Center for Hematologic Diseases of Hubei Province, Wuhan, China
| | - Yuhan Bao
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Immunotherapy Research Center for Hematologic Diseases of Hubei Province, Wuhan, China
| | - Miao Zheng
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
- Immunotherapy Research Center for Hematologic Diseases of Hubei Province, Wuhan, China.
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16
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Mou W, Yang Z, Wang X, Hei M, Wang Y, Gui J. Immunological assessment of a patient with Omenn syndrome resulting from compound heterozygous mutations in the RAG1 gene. Immunogenetics 2023:10.1007/s00251-023-01309-5. [PMID: 37269334 DOI: 10.1007/s00251-023-01309-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 05/17/2023] [Indexed: 06/05/2023]
Abstract
The recombination activating gene 1 (RAG1) is essential for V(D)J recombination during T- and B-cell development. In this study, we presented a case study of a 41-day-old female infant who exhibited symptoms of generalized erythroderma, lymphadenopathy, hepatosplenomegaly, and recurrent infections including suppurative meningitis and septicemia. The patient showed a T+B-NK+ immunophenotype. We observed an impaired thymic output, as indicated by reduced levels of naive T cells and sjTRECs, coupled with a restricted TCR repertoire. Additionally, T-cell CFSE proliferation was impaired, indicating a suboptimal T-cell response. Notably, our data further revealed that T cells were in an activated state. Genetic analysis revealed a previously reported compound heterozygous mutation (c. 1186C > T, p. R396C; c. 1210C > T, p. R404W) in the RAG1 gene. Structural analysis of RAG1 suggested that the R396C mutation might lead to the loss of hydrogen bonds with neighboring amino acids. These findings contribute to our understanding of RAG1 deficiency and may have implications for the development of novel therapies for patients with this condition.
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Affiliation(s)
- Wenjun Mou
- Laboratory of Tumor Immunology, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China
| | - Zixin Yang
- Department of Neonatology, Neonatal Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China
| | - Xiaojiao Wang
- Department of Neonatology, Neonatal Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China
| | - Mingyan Hei
- Department of Neonatology, Neonatal Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China.
| | - Yajuan Wang
- Department of Neonatology, Children's Hospital, Capital Institute of Pediatrics, Beijing, 100020, China.
| | - Jingang Gui
- Laboratory of Tumor Immunology, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China.
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17
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Wang R, Jiang S, Wang X, Wei D, Xu Q, Wu W. Structural and functional exploration of three newly identified coagulation factor IX mutations in Chinese hemophilia B patients. Int J Hematol 2023:10.1007/s12185-023-03616-9. [PMID: 37210691 DOI: 10.1007/s12185-023-03616-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 05/22/2023]
Abstract
AIM To structurally and functionally characterize three newly identified F9 missense mutations, C268Y, I316F, and G413V, in Chinese hemophilia B patients. METHODS FIX mutants were expressed in vitro by transient transfection of Chinese hamster ovary (CHO) cells. One-stage activated partial thromboplastin time (APTT) based assay and enzyme-linked immunosorbent assay (ELISA) were used to measure the coagulation activity and antigen level of FIX in conditioned medium. Western blot analysis was also used to evaluate interference of the mutations with synthesis and secretion of FIX. A structural model of the FIX G413V mutant was constructed and structural disturbance caused by the mutation was determined by molecular dynamics simulations. RESULTS Both C268Y and I316F impaired expression of FIX. However, the I316F mutant degraded quickly, whereas the C268Y mutant mostly accumulated intracellularly. The G413V mutant could be synthesized and secreted normally, but procoagulant activity was almost completely lost. This loss is likely mostly due to the impact on the catalytic residue cS195. CONCLUSION The three FIX mutations identified in Chinese hemophilia B patients either impaired the expression of FIX, as was seen with the I316F and C268Y mutants, or impaired the function of FIX, as was seen with the G413V mutant.
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Affiliation(s)
- Rui Wang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin Second Road, Shanghai, 200025, China
- College of Health Science and Technology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Center for Clinical Laboratory, Shanghai, China
| | - Shifeng Jiang
- State Key Laboratory of Microbial Metabolism and Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Ye-Jiequan building 412, 800 Dongchuan Road, Shanghai, 200240, China
| | - Xuefeng Wang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin Second Road, Shanghai, 200025, China
- College of Health Science and Technology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Collaborative Innovation Center of Hematology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Dongqing Wei
- State Key Laboratory of Microbial Metabolism and Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Ye-Jiequan building 412, 800 Dongchuan Road, Shanghai, 200240, China
| | - Qin Xu
- State Key Laboratory of Microbial Metabolism and Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Ye-Jiequan building 412, 800 Dongchuan Road, Shanghai, 200240, China.
| | - Wenman Wu
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin Second Road, Shanghai, 200025, China.
- College of Health Science and Technology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
- Collaborative Innovation Center of Hematology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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Yoshino M, Shimabukuro W, Takeichi M, Omura J, Yokota C, Yamamoto J, Nakanishi K, Morisada N, Nozu K, Iijima K, Takahashi Y. A case of Potter sequence with WT1 mutation. CEN Case Rep 2023; 12:184-188. [PMID: 36227513 PMCID: PMC10151295 DOI: 10.1007/s13730-022-00742-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 10/03/2022] [Indexed: 05/02/2023] Open
Abstract
Wilms tumor 1 (WT1) is the causative gene of Denys-Drash syndrome and Frasier syndrome, and in most cases, kidney failure develops after birth. We report an unusual case of Potter sequence due to fetal nephropathy and kidney failure with a WT1 mutation. The neonate was born at 37 weeks of gestation, and had no distinctive facial appearance or anomalies of the extremities. The external genitalia were ambiguous. Presence of a penile-like structure or hypertrophic clitoris was noted, and the urethra opened at the base of the penis or clitoris. On ultrasonographic examination, the kidney sizes were small. No kidney cysts were noted, but the kidney parenchymal luminosity was increased. Although the neonate received mechanical ventilation because of severe retractive breathing after birth, he died of poor oxygenation due to air leak syndrome at 60 h after birth. The congenital anomalies of the kidney and urinary tract (CAKUT) gene panel revealed a heterozygous missense mutation in WT1 [NM_024426.6:exon9:c.1400G > A, p.(Arg467Gln)]. In WT1, missense mutations are associated with earlier onset of nephropathy than nonsense or splicing mutations. However, severe cases of fetal onset and early neonatal death with WT1 mutations are rare, and only one severe case with the same missense mutation in WT1 has been reported. Therefore, WT1 mutation may be suspected in Potter sequence patients with external genital abnormalities, and the WT1 missense mutation in our case [NM_024426.6:exon9:c.1400G > A, p.(Arg467Gln)] may indicate a severe case with fetal onset of nephropathy and kidney failure.
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Affiliation(s)
- Miwa Yoshino
- Department of Pediatrics, Kyushu Hospital, Japan Community Healthcare Organization, 1-8-1, Kishinoura, Yahatanishi-ku, Kitakyushu, Fukuoka, 806-8501, Japan.
| | - Wataru Shimabukuro
- Department of Pediatrics, Kyushu Hospital, Japan Community Healthcare Organization, 1-8-1, Kishinoura, Yahatanishi-ku, Kitakyushu, Fukuoka, 806-8501, Japan
- Department of Child Health and Welfare (Pediatrics), Graduate School of Medicine, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Mina Takeichi
- Department of Pediatrics, Kyushu Hospital, Japan Community Healthcare Organization, 1-8-1, Kishinoura, Yahatanishi-ku, Kitakyushu, Fukuoka, 806-8501, Japan
| | - Junya Omura
- Department of Pediatrics, Kyushu Hospital, Japan Community Healthcare Organization, 1-8-1, Kishinoura, Yahatanishi-ku, Kitakyushu, Fukuoka, 806-8501, Japan
| | - Chie Yokota
- Department of Pediatrics, Kyushu Hospital, Japan Community Healthcare Organization, 1-8-1, Kishinoura, Yahatanishi-ku, Kitakyushu, Fukuoka, 806-8501, Japan
| | - Junko Yamamoto
- Department of Pediatrics, Kyushu Hospital, Japan Community Healthcare Organization, 1-8-1, Kishinoura, Yahatanishi-ku, Kitakyushu, Fukuoka, 806-8501, Japan
| | - Koichi Nakanishi
- Department of Child Health and Welfare (Pediatrics), Graduate School of Medicine, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Naoya Morisada
- Department of Pediatrics, Graduate School of Medicine, Kobe University, Nada, Hyogo, Japan
| | - Kandai Nozu
- Department of Pediatrics, Graduate School of Medicine, Kobe University, Nada, Hyogo, Japan
| | - Kazumoto Iijima
- Department of Pediatrics, Graduate School of Medicine, Kobe University, Nada, Hyogo, Japan
| | - Yasuhiko Takahashi
- Department of Pediatrics, Kyushu Hospital, Japan Community Healthcare Organization, 1-8-1, Kishinoura, Yahatanishi-ku, Kitakyushu, Fukuoka, 806-8501, Japan
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Yan L, Wang T, Qiu J, Zhang X, Peng J, Fang Y, Sheng Z. Identification of a novel mutation in the factor XIII A subunit in a patient with inherited factor XIII deficiency. Int J Hematol 2023:10.1007/s12185-023-03594-y. [PMID: 37059930 DOI: 10.1007/s12185-023-03594-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 04/16/2023]
Abstract
Inherited factor XIII (FXIII) deficiency is an extremely rare and under-diagnosed autosomal recessive inherited coagulopathy, which is caused by genetic defects in the F13A1 or F13B gene. More than 200 genetic mutations have been identified since the first case of inherited FXIII deficiency was reported. This study aimed to identify underlying gene mutations in a patient with inherited FXIII deficiency who presented with recurrent intracerebral hemorrhage. Levels of plasma FXIII-A antigen were measured, F13A1 and F13B genes were sequenced, mutation information was analyzed, and the mutated protein structure was predicted using bioinformatics methods. Molecular genetic analysis identified four mutations of FXIII-related genes in the proband, including three previously reported mutations inherited from his parents (c.631G>A, p.Gly210Arg and c.1687G>A, p.Gly562Arg of F13A1 gene and c.344G>A, p.Arg115His of F13B gene) and a novel spontaneous mutation of F13A1 gene (c.2063C>G, p.Ser687Cys). Molecular structural modeling demonstrated that the novel Ser687Cys mutation may cause changes in the spatial structure of FXIII-A and increase its instability. In conclusion, we identified a novel and likely pathogenic mutation of the F13A1 gene, which enriched the gene mutation spectrum of inherited FXIII deficiency. The findings may provide promising targets for diagnosis and treatment of inherited FXIII deficiency.
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Affiliation(s)
- Lijie Yan
- Department of Hematology, Qilu Hospital of Shandong University, No. 107 Wenhua West Road, Jinan, China
| | - Tiantian Wang
- Shandong Blood Center, Shandong Hemophilia Treatment Center, No. 22, Shanshi East Road, Jinan, China
| | - Jihua Qiu
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, Jinan, China
| | - Xinsheng Zhang
- Shandong Blood Center, Shandong Hemophilia Treatment Center, No. 22, Shanshi East Road, Jinan, China
| | - Jun Peng
- Department of Hematology, Qilu Hospital of Shandong University, No. 107 Wenhua West Road, Jinan, China
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Yunhai Fang
- Shandong Blood Center, Shandong Hemophilia Treatment Center, No. 22, Shanshi East Road, Jinan, China.
| | - Zi Sheng
- Department of Hematology, Qilu Hospital of Shandong University, No. 107 Wenhua West Road, Jinan, China.
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, Jinan, China.
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Biswas S, Bagchi A. Analysis of the structural dynamics of the mutations in the kinase domain of PINK1 protein associated with Parkinson's disease. Gene 2023; 857:147183. [PMID: 36623675 DOI: 10.1016/j.gene.2023.147183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/19/2022] [Accepted: 01/04/2023] [Indexed: 01/09/2023]
Abstract
Parkinson's disease (PD) is a very common neurodegenerative disorder and is considered to be one of the most severe disorders worldwide. Mutations in some PD causing genes are responsible for the early onset of the disease. Pathogenic variants in parkin, PINK1 and DJ1 genes can cause early-onset of PD. Many PINK1 gene mutations have been reported, but not all variants are pathogenic. The gene product of PINK1, also known as PINK1 protein, has 581 amino acid residues in it. Several different mutations are present throughout the kinase domain of PINK1 protein. In this work, we used in silico approaches to analyze the different types of mutations that are distributed in the kinase domain of the PINK1 protein. Based on our results, we categorized the mutations as high, moderate and low pathogenic variants. Furthermore, we performed molecular dynamics simulations of the pathogenic PINK1 variants to decipher their possible impacts on the structure and made a comparison with the wild type PINK1. In conclusion, we suggested the possible mechanistic roles of the pathogenic variants of PINK1 kinase domain that can affect its function. These pathogenic variants are the causative agents of early onset of PD called autosomal recessive Parkinson disease.
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Affiliation(s)
- Sima Biswas
- Department of Biochemistry and Biophysics, University of Kalyani, Kalyani - 741235, Nadia, West Bengal, India
| | - Angshuman Bagchi
- Department of Biochemistry and Biophysics, University of Kalyani, Kalyani - 741235, Nadia, West Bengal, India.
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21
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Khakzad M, Shahbazi Z, Naderi M, Karimipoor M. A de novo TINF2, R282C Mutation in a Case of Dyskeratosis Congenital Founded by Next-Generation Sequencing. Iran Biomed J 2023; 27:146-51. [PMID: 37070599 PMCID: PMC10314759 DOI: 10.61186/ibj.3783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 10/26/2022] [Indexed: 12/17/2023]
Abstract
Background Dyskeratosis congenita (DC), an inherited and rare disease prevalent in males, is clinically manifested by reticulate hyperpigmentation, nail dystrophy, and leukoplakia. DC is associated with the increased risk of malignancy and other potentially lethal complications such as bone marrow failure, as well as lung and liver diseases. Mutations in 19 genes were found to be correlated with DC. Herein, we report a 12-year-old boy carrying a de novo mutation in TINF2 gene. Methods Whole exome sequencing (WES) was performed on DNA sample of the proband, and the variant was investigated in the family by Sanger sequencing. Population and bioinformatics analysis were performed. Results The NM_ 001099274.3(TINF2): c.844C>T (p.Arg282Cys) mutation was found by WES. Conclusion There was no history of the disease in the family, and the variant was classified as a de novo mutation.
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Affiliation(s)
- Motahareh Khakzad
- Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Zahra Shahbazi
- Pediatric Cell and Gene Therapy Research Center, Gene, Cell & Tissue Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Majid Naderi
- Ali Ebne Abitaleb Hospital, School of Medicine, University of Medical Sciences, Zahedan, Iran
| | - Morteza Karimipoor
- Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
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22
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Syed NA, Bhatti A, John P. Molecular dynamics simulations and bioinformatics' analysis of deleterious missense single nucleotide polymorphisms in Glyoxalase-1 gene. J Biomol Struct Dyn 2023; 41:13707-13717. [PMID: 36812296 DOI: 10.1080/07391102.2023.2181654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 02/12/2023] [Indexed: 02/24/2023]
Abstract
Glyoxalase-1 (Glo-1) is a key member of the Glyoxalase system, the primary line of defense against dicarbonyl stress which, in tandem, with reduced levels of expression or activity of Glyoxalase-1 enzyme, has been implicated in various human diseases like type 2 diabetes mellitus (T2DM) and its vascular complications. The association of Glo-1 single nucleotide polymorphisms with genetic susceptibility to T2DM and its vascular complications is yet to be explored. Therefore, in this study, we have employed a computational approach to identify the most damaging missense or nonsynonymous SNPs (nsSNPs) in Glo-1 gene. Initially, we characterized missense SNPs that are damaging to the structural and functional integrity of Glo-1 using various bioinformatic tools. These tools included SIFT, PolyPhen-2, SNAP, PANTHER, PROVEAN, PhD-SNP, SNPs&GO, I-Mutant, MUpro and MutPred2. One of these missense SNPs (rs1038747749; corresponding to amino acid change Arginine to Glutamine at position 38) was found to be highly conserved in evolution and is an important part of the enzyme's active site, glutathione binding site, as well as the dimeric interface based on the results obtained from ConSurf and NCBI Conserved Domain Search tools. Project HOPE reported that this mutation replaces a positively charged polar amino acid (Arginine) with a small, neutrally charged amino acid (Glutamine). Comparative modelling of wildtype and mutant (R38Q) Glo-1 proteins was performed in the run up to molecular dynamics simulation analysis which showed that rs1038747749 adversely impacts Glo-1 protein's stability, rigidity, compactness, hydrogen bonds/interactions as demonstrated by the results of various parameters computed during the analysis.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Nida Ali Syed
- Department of Healthcare Biotechnology, Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Attya Bhatti
- Department of Healthcare Biotechnology, Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Peter John
- Department of Healthcare Biotechnology, Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), Islamabad, Pakistan
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23
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van der Westhuizen ET. Single nucleotide variations encoding missense mutations in G protein-coupled receptors may contribute to autism. Br J Pharmacol 2023. [PMID: 36787962 DOI: 10.1111/bph.16057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/21/2022] [Accepted: 02/04/2023] [Indexed: 02/16/2023] Open
Abstract
Autism is a neurodevelopmental condition with a range of symptoms that vary in intensity and severity from person to person. Genetic sequencing has identified thousands of genes containing mutations in autistic individuals, which may contribute to the development of autistic symptoms. Several of these genes encode G protein-coupled receptors (GPCRs), which are cell surface expressed proteins that transduce extracellular messages to the intracellular space. Mutations in GPCRs can impact their function, resulting in aberrant signalling within cells and across neurotransmitter systems in the brain. This review summarises the current knowledge on autism-associated single nucleotide variations encoding missense mutations in GPCRs and the impact of these genetic mutations on GPCR function. For some autism-associated mutations, changes in GPCR expression levels, ligand affinity, potency and efficacy have been observed. However, for many the functional consequences remain unknown. Thus, further work to characterise the functional impacts of the genetically identified mutations is required.
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Kim YR, Kim HM, Lee B, Baek JI, Lee KY, Park HJ, Kim UK. Identification of novel missense mutation related with non-syndromic sensorineural deafness, DFNA11 in korean family by NGS. Genes Genomics 2023; 45:225-230. [PMID: 36630074 DOI: 10.1007/s13258-022-01357-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 12/17/2022] [Indexed: 01/12/2023]
Abstract
BACKGOUND Hereditary hearing loss is one of the most common genetically heterogeneous defects in human. About 70% of hereditary hearing loss is defined as non-syndromic hearing loss showing loss of hearing ability without any other symptoms. Up to date, the identified genes associated with non-syndromic hearing loss are 128, including 52 genes for DFNA and 76 genes for DFNB. Because of high levels of heterogeneity, it is difficult to identify the causative factors for hearing loss using Sanger sequencing. OBJECTIVE Our aim was to detect causative factors and investigate pathogenic mutations, which co-segregates within the candidate family. METHODS We used Next Generation Sequencing technique to investigate whole-exome sequences of a Korean family with non-syndromic hereditary hearing loss. The family showed autosomal dominant inheritance pattern. RESULTS We identified a novel missense variation, c.1978G > A in MYO7A gene, in the family with the autosomal dominant inheritance pattern. c.1978G > A produced Gly660Arg in the motor head domain of Myosin VIIA disrupt the ATP- and actin-binding motif function. CONCLUSION This study is the first to report pathogenic mutations within MYO7A gene in Korean family and our data would facilitate diagnosing the primary cause of hereditary hearing loss in Korean.
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Affiliation(s)
- Ye-Ri Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea.,Advanced Bio-Resource Research Center, Kyungpook National University, Daegu, Republic of Korea
| | - Hye-Min Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea.,School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea
| | - Byeonghyeon Lee
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, Republic of Korea
| | - Jeong-In Baek
- Department of Companion Animal Health, College of Rehabilitation and Health, Deagu Haany University, Gyeongsan, Republic of Korea
| | - Kyu-Yup Lee
- Department of Internal Medicine, Research Institute of Aging and Metabolism, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | | | - Un-Kyung Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea. .,School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea.
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Luo M, Zhang Y, Xu Z, Lv S, Wei Q, Dang Q. Experimental analysis of bladder cancer-associated mutations in EP300 identifies EP300-R1627W as a driver mutation. Mol Med 2023; 29:7. [PMID: 36647005 PMCID: PMC9843983 DOI: 10.1186/s10020-023-00608-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 12/27/2022] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Bladder cancer (BCa) is the most common malignant tumor of the urinary system, with transitional cell carcinoma (TCC) being the predominant type. EP300 encodes a lysine acetyltransferase that regulates a large subset of genes by acetylating histones and non-histone proteins. We previously identified several bladder cancer-associated mutations in EP300 using high-throughput sequencing; however, the functional consequences of these mutations remain unclear. METHODS Bladder cancer cells T24 and TCC-SUP were infected with shEP300 lentiviruses to generate stable EP300 knockdown cell lines. The expression levels of EP300, p16 and p21 were detected by real-time PCR and western blots. The transcriptional activity of p16 and p21 were detected by dual luciferase assay. Cell proliferation assay, flow cytometric analyses of cell cycle, invasion assay and xenograft tumor model were used to measure the effect of EP300-R1627W mutation in bladder cancer. Immunoprecipitation was used to explore the relationship between EP300-R1627W mutation and p53. Structural analysis was used to detect the structure of EP300-R1627W protein compared to EP300-wt protein. RESULTS we screened the mutations of EP300 and found that the EP300-R1627W mutation significantly impairs EP300 transactivation activity. Notably, we demonstrated that the R1627W mutation impairs EP300 acetyltransferase activity, potentially by interfering with substrate binding. Finally, we show that EP300-R1627W is more aggressive in growth and invasion in vitro and in vivo compared to cells expressing EP300-wt. We also found that the EP300-R1627W mutation occurs frequently in seven different types of cancers. CONCLUSION In summary, our work defines a driver role of EP300-R1627W in bladder cancer development and progression.
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Affiliation(s)
- Mayao Luo
- grid.416466.70000 0004 1757 959XDepartment of Urology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515 Guangdong China
| | - Yifan Zhang
- grid.416466.70000 0004 1757 959XDepartment of Urology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515 Guangdong China
| | - Zhuofan Xu
- grid.416466.70000 0004 1757 959XDepartment of Urology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515 Guangdong China
| | - Shidong Lv
- grid.416466.70000 0004 1757 959XDepartment of Urology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515 Guangdong China
| | - Qiang Wei
- grid.416466.70000 0004 1757 959XDepartment of Urology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515 Guangdong China
| | - Qiang Dang
- grid.416466.70000 0004 1757 959XDepartment of Urology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515 Guangdong China
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Tayubi IA, Madar IH. Identification of potential inhibitor targeting KRAS mutation in Papillary Thyroid Carcinoma through molecular docking and dynamic simulation analysis. Comput Biol Med 2023; 152:106377. [PMID: 36493736 DOI: 10.1016/j.compbiomed.2022.106377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 11/19/2022] [Accepted: 11/27/2022] [Indexed: 11/30/2022]
Abstract
Thyroid cancer is a predominant form of endocrine malignancy, which destabilizes the metabolic rate of the body. The rapid increase in the incidence rate of thyroid cancer in recent years has aroused great concern to be investigated and diagnosed at an early stage. This study aimed to analyze the pathogenic mutations in thyroid cancer to identify their potential inhibitors for therapeutic targets. RAS genes are the most common oncogenes, which encode proteins that play an essential role in cell signaling and have been frequently mutated in different cancer types. The mutation in these genes causes abnormal cell growth and fails to respond to death signals. In this study, we identified the most significant mutations in the RAS genes; thus, the highly pathogenic mutations were curated from thyroid cancer patients and analyzed for their pathogenicity effect. The physicochemical analysis predicted mutation in wild-type KRAS protein had adapted negative charge on single base substitution of G12D that may easily cause loss of interactions and result in critical differences in the structure and function of the protein. Furthermore, the native KRAS protein was mutated and screened against a library of druggable compounds from the ZINC drug repository. The molecular docking analysis revealed that G12D mutant KRAS protein form best-docked complex with Naldemedine with the highest binding affinity. The dynamic simulation results further justified the stability of Naldemedine as a potential inhibitor with high efficiency in MMPBSA value of -45.4867 kcal/mol of being treated as a potential drug for papillary thyroid carcinoma. Further in vivo and in vitro validation of Naldemedine and its efficiency as a drug for the targeted pathogenic KRAS mutation is required.
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Affiliation(s)
- Iftikhar Aslam Tayubi
- Department of Computer Science, Faculty of Computing and Information Technology, King Abdulaziz University, Rabigh, 21911, Kingdom of Saudi Arabia.
| | - Inamul Hasan Madar
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
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Erkal B, Akçeşme B, Çoban A, Korkut ŞV. A comprehensive in silico analysis of multiple sclerosis related non-synonymous SNPs and their potential effects on protein structure and function. Mult Scler Relat Disord 2022; 68:104253. [PMID: 36544314 DOI: 10.1016/j.msard.2022.104253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 10/11/2022] [Accepted: 10/16/2022] [Indexed: 11/21/2022]
Abstract
BACKGROUND Multiple Sclerosis (MS) is an autoimmune and central nervous system disease characterized by an inflammatory demyelinating process in the brain. Although the exact cause of MS is still unclear, environmental, and genetic factors are known to play a role in the development of disease. New molecular markers must be identified to understand the mechanism of disease formation and progression. We investigated the effects of MS-related non-synonymous single-nucleotide polymorphisms (nsSNPs) on the structure and function of identified proteins in this study. METHODS Missense variations associated with MS were extracted from the NHGRI-EBI GWAS database. Functional and structural analysis of nsSNPs on mapped genes was performed using g:Profiler, Wikipathway, KEGG, Reactome and Gene ontology programs (p < 0.05 was accepted statistically significant). Amino acid sequence-based analysis was performed to identify deleterious variants by using PROVEAN and PredictSNP tools. Finally, protein structure analyzes were performed on deleterious protein variants by DynaMut, Mutabind2 and Missense3D servers to identify changes in protein stability and flexibility. RESULTS 10 target nsSNPs were identified. Among these rs34536443, rs10936599, rs2293152, rs11808092, rs1129183 were found deleterious according to amino acid sequence-based analysis. Furthermore, structure-based analyses show that TYK2 (P1104A), MYNN (H6Q), EVI5 (Q612H), and LZTFL1 (D246N) substitutions increase protein stability and decrease structure flexibility, whereas STAT3 (R426G) substitution decreases protein stability and increases structure flexibility. CONCLUSION We revealed that identified nsSNPs have potential effects on stability and flexibility of the target proteins. The prominent target genes are thought to have significant impacts on the pathogenesis of MS. Further in vitro and in vivo studies are required to validate our in silico results.
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Liu X, Liang L, Wu B, Zhang X, Zeng X, Deng Y, Peng B, Zhang X, Zheng L. Effect of the R126C mutation on the structure and function of the glucose transporter GLUT1: A molecular dynamics simulation study. J Mol Graph Model 2022; 116:108227. [PMID: 35671570 DOI: 10.1016/j.jmgm.2022.108227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 12/14/2022]
Abstract
Glucose transporter 1 (GLUT1) is responsible for basal glucose uptake and is expressed in most tissues under normal conditions. GLUT1 mutations can cause early-onset absence epilepsy and myoclonus dystonia syndrome (MDS), with MDS potentially lethal. In this study, the effect of the R126C mutation, which is associated with MDS, on structural stability and substrate transport of GLUT1 was investigated. Various bioinformatics tools were used to predict the stability of GLUT1, revealing that the R126C mutation reduces the structural stability of GLUT1. Molecular dynamics (MD) simulations were used to further characterize the effect of the R126C mutation on GLUT1 structural stability. Based on the MD simulations, specific conformational changes and dominant motions of the GLUT1 mutant were characterized by Principal component analysis (PCA). The mutation disrupts hydrogen bonds between substrate-binding residues and glucose, thus likely reducing substrate affinity. The R126C mutation reduces the conformational stability of the protein, and fewer intramolecular hydrogen bonds were present in the mutated GLUT1 when compared with that of wild-type GLUT1. The mutation increased the free energy of glucose transport through GLUT1 significantly, especially at the mutation site, indicating that passage of glucose through the channel is hindered, and this mutant may even release cytoplasmic glucose. This study provides a detailed atomic-level explanation for the reduced structural stability and substrate transport capacity of a GLUT1 mutant. The results aid our understanding of the structure of GLUT1 and provide a framework for developing drugs to treat GLUT1-related diseases, such as MDS.
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Affiliation(s)
- Xiaoliu Liu
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China; Medical Laboratory of Shenzhen Luohu People's Hospital, 518001, China
| | - Luguang Liang
- School of Laboratory Medicine, Guangdong Medical University, Dongguan, China
| | - Bodeng Wu
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Xin Zhang
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | | | - Yurong Deng
- Medical Laboratory of Shenzhen Luohu People's Hospital, 518001, China
| | - Bin Peng
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Xiuming Zhang
- Medical Laboratory of Shenzhen Luohu People's Hospital, 518001, China.
| | - Lei Zheng
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
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Kim B, Jang HN, Chae KS, Shin HS, Kim YH, Kim SJ, Seong MW, Kim JH. A Novel Missense PRKAR1A Variant Causes Carney Complex. Endocrinol Metab (Seoul) 2022; 37:810-815. [PMID: 36193716 PMCID: PMC9633213 DOI: 10.3803/enm.2022.1544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 08/26/2022] [Indexed: 12/30/2022] Open
Abstract
The Carney complex (CNC) is an autosomal dominant disorder characterized by endocrine and nonendocrine tumors. Loss-of-function variants of protein kinase A regulatory subunit 1 alpha (PRKAR1A) are common causes of CNC. Here, we present the case of a patient with CNC with a novel PRKAR1A missense variant. A 21-year-old woman was diagnosed with CNC secondary to acromegaly and adrenal Cushing syndrome. Genetic analysis revealed a novel missense heterozygous variant of PRKAR1A (c.176A>T). Her relatives, suspected of having CNC, also carried the same variant. RNA analysis revealed that this variant led to nonsense-mediated mRNA decay. In vitro functional analysis of the variant confirmed its role in increasing protein kinase A activity and cyclic adenosine monophosphate levels. This study broadens our understanding of the genetic spectrum of CNC. We suggest that PRKAR1A genetic testing and counseling be recommended for patients with CNC and their families.
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Affiliation(s)
- Boram Kim
- Department of Laboratory Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
| | - Han Na Jang
- Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Kyung Shil Chae
- Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Ho Seop Shin
- Department of Laboratory Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Yong Hwy Kim
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
- Pituitary Center, Seoul National University Hospital, Seoul, Korea
| | - Su Jin Kim
- Department of Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Moon-Woo Seong
- Department of Laboratory Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
- Corresponding authors: Moon-Woo Seong. Department of Laboratory Medicine, Biomedical Research Institute, Seoul National University Hospital, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea Tel: +82-2-2072-4180, Fax: +82-2-747-0359, E-mail:
| | - Jung Hee Kim
- Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
- Pituitary Center, Seoul National University Hospital, Seoul, Korea
- Corresponding authors: Moon-Woo Seong. Department of Laboratory Medicine, Biomedical Research Institute, Seoul National University Hospital, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea Tel: +82-2-2072-4180, Fax: +82-2-747-0359, E-mail:
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Yu PH, Tsai MC, Chiang CT, Wang HY, Kuo PL. Novel mutation of MAP3K1 gene in 46,XY DSD with complete gonadal dysgenesis. Taiwan J Obstet Gynecol 2022; 61:903-5. [PMID: 36088066 DOI: 10.1016/j.tjog.2022.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/26/2022] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE Swyer syndrome, or 46, XY complete gonadal dysgenesis, is a disorder of human sexual development which present with female external genitalia, lack of female reproductive organs, and a 46, XY karyotype. Many genes that participate in human sexual development have been implicated in the pathogenesis of 46, XY gonadal dysgenesis. CASE REPORT A 18-year-old phenotypically female was presented with primary amenorrhea. Surveillance revealed hypergonadotropic hypogonadism, a normal male 46, XY karyotype and absent of functional gonad, which was confirmed by pathological examination of the streak gonad. Whole exome sequencing showed germline mutations of a novel missense variant, c.570G > C, p.Lys190Asn, in exon 2 of MAP3K1 gene. CONCLUSION Given evolutionary conservation of lysine residue at position 190, the amino acid substitution may interfere with interaction between MAP3K1 and RHOA, and contributes to complete gonadal dysgenesis in the context of 46,XY.
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Goyal S, Vanita V. A missense mutation in TTC8/BBS8 affecting mRNA splicing in patients with non-syndromic retinitis pigmentosa. Mol Genet Genomics 2022; 297:1439-1449. [PMID: 35939099 DOI: 10.1007/s00438-022-01933-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 07/19/2022] [Indexed: 11/27/2022]
Abstract
Splicing disruption is one type of mutation mechanism for disease-predisposing alleles. To date, less than 30 mutations in TTC8/BBS8 have been reported; however, mutations affecting the splice site are rare. Generally missense mutations are assumed to alter protein function; however, reports have shown that mutations in protein coding exons can disrupt splicing by altering exonic splicing silencer or enhancer motifs. Hence, a missense mutation c.1347G > C (p.Q449H) involving final base of the exon 13 in the TTC8, previously identified by us to be linked with non-syndromic autosomal recessive retinitis pigmentosa (arRP), in an Indian family, that might deleteriously affect splicing has been functionally characterized. RNA was isolated, cDNA prepared and amplified using region-specific primers. PCR products were purified and sequenced bi-directionally by Sanger sequencing. Effect of mutation (c.1347G > C) on mRNA splicing has been predicted using bioinformatics tools. We reported that missense mutation (c.1347G > C) at the last base of exon 13 of TTC8 disrupted the canonical donor splice-site resulting in aberrant RNA splicing. A cryptic donor splice-site got activated 77 bases downstream of the authentic splice donor site in intron 13, resulting in the retention of 77 bases of intron 13, and a frameshift leading to pre-mature termination codon in exon 14 at codon 486. Further, duplication of exon 15 and fusion of its duplicated copy occurred with exon 13. The binding site for SC35 protein, normally involved in splicing, also got disrupted (as predicted by SpliceAid2 software), hence, leading to alternative splicing. Our findings strongly suggest that a missense mutation c.1347G > C in TTC8 disrupted the splice donor site causing retention of 77 bases of intron 13, resulting in a frameshift and subsequently introduced a pre-mature termination codon into exon 14, hence creating an altered mRNA transcript. These findings emphasize the significance of examining missense mutations especially in TTC8, to determine their pathogenic role through alternative splicing. Present findings also reiterate the notion that mutations in the TTC8/BBS8 cause phenotypic heterogeneity and does not always follow Mendelian genetics in this ciliopathy.
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Affiliation(s)
- Shiwali Goyal
- Department of Human Genetics, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Vanita Vanita
- Department of Human Genetics, Guru Nanak Dev University, Amritsar, Punjab, 143005, India.
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Meireles MR, Stelmach LH, Bandinelli E, Vieira GF. Unveiling the influence of factor VIII physicochemical properties on hemophilia A phenotype through an in silico methodology. Comput Methods Programs Biomed 2022; 219:106768. [PMID: 35367915 DOI: 10.1016/j.cmpb.2022.106768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 01/24/2022] [Accepted: 03/19/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND AND OBJECTIVES Hemophilia A (HA) is an X-linked blood disorder. It is caused by pathogenic F8 gene variants, among which missense mutations are the most prevalent. The resulting amino acid substitutions may have different impacts on physicochemical properties and, consequently, on protein functionality. Regular prediction tools do not include structural elements and their physiological significance, which hampers our ability to functionally link variants to disease phenotype, opening an ample field for investigation. The present study aims to elucidate how physicochemical changes generated by substitutions in different protein domains relate to HA, and which of these features are more consequential to protein function and its impact on HA phenotype. METHODS An in silico evaluation of 71 F8 variants found in patients with different HA phenotypes (mild, moderate, severe) was performed to understand protein modifications and functional impact. Homology modeling was used for the structural analysis of physicochemical changes including electrostatic potential, hydrophobicity, solvent-accessible/excluded surface areas, disulfide disruptions, and substitutions indexes. These variants and properties were analyzed by hierarchical clustering analysis (HCA) and principal component analysis (PCA), independently and in combination, to investigate their relative contribution. RESULTS About 69% of variants show electrostatic changes, and almost all show hydrophobicity and surface area modifications. HCA combining all physicochemical properties analyzed was better in reflecting the impact of different variants in disease severity, more so than the single feature analysis. On the other hand, PCA led to the identification of prominent properties involved in the clustering results for variants of different domains. CONCLUSIONS The methodology developed here enables the assessment of structural features not available in other prediction tools (e.g., surface distribution of electrostatic potential), evaluating what kind of physicochemical changes are involved in FVIII functional disruption. HCA results allow distinguishing substitutions according to their properties, and yielded clusters which were more homogeneous in phenotype. All evaluated properties are involved in determining disease severity. The nature, as well as the position of the variants in the protein, were shown to be relevant for physicochemical changes, demonstrating that all these aspects must be collectively considered to fine-tune an approach to predict HA severity.
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Affiliation(s)
- Mariana R Meireles
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Caixa Postal 15053, Porto Alegre 91501-970, RS, Brasil
| | - Lara H Stelmach
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Caixa Postal 15053, Porto Alegre 91501-970, RS, Brasil
| | - Eliane Bandinelli
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Caixa Postal 15053, Porto Alegre 91501-970, RS, Brasil
| | - Gustavo F Vieira
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Caixa Postal 15053, Porto Alegre 91501-970, RS, Brasil; Universidade La Salle, Canoas, RS, Brasil.
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Uddin MB, Roy KR, Hill RA, Roy SC, Gu X, Li L, Zhang QJ, You Z, Liu YY. p53 missense mutant G242A subverts natural killer cells in sheltering mouse breast cancer cells against immune rejection. Exp Cell Res 2022; 417:113210. [PMID: 35597298 DOI: 10.1016/j.yexcr.2022.113210] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 05/07/2022] [Accepted: 05/14/2022] [Indexed: 11/15/2022]
Abstract
Cancer cells acquire immunoediting ability to evade immune surveillance and thus escape eradication. It is widely known that mutant proteins encoded from tumor suppressor TP53 exhibit gain-of-function in cancer cells, thereby promoting progression; however, how mutant p53 contributes to the sheltering of cancer cells from host anticancer immunity remains unclear. Herein, we report that murine p53 missense mutation G242A (corresponding to human G245A) suppresses the activation of host natural killer (NK) cells, thereby enabling breast cancer cells to avoid immune assault. We found that serial injection of EMT6 breast cancer cells that carry wild-type (wt) Trp53, like normal fibroblasts, promoted NK activity in mice, while SVTneg2 cells carrying Trp53 G242A+/+ mutation decreased NK cell numbers and increased CD8+ T lymphocyte numbers in spleen. Innate immunity based on NK cells and CD8 T cells was reduced in p53 mutant-carrying transgenic mice (Trp53 R172H/+, corresponding to human R175H/+). Further, upon co-culture with isolated NK cells, EMT6 cells substantively activated NK cells and proliferation thereof, increasing interferon-gamma (IFN-γ) production; however, SVTneg2 cells suppressed NK cell activation. Further mechanistic study elucidated that p53 can modulate expression by cancer cells of Mult-1 and H60a, which are activating and inhibitory ligands for NKG2D receptors of NK cells, respectively, to enhance immune surveillance against cancer. Our findings demonstrate that wt p53 is requisite for NK cell-based immune recognition and elimination of cancerous cells, and perhaps more importantly, that p53 missense mutant presence in cancer cells impairs NK cell-attributable responses, thus veiling cancerous cells from host immunity and enabling cancer progression.
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Affiliation(s)
- Mohammad B Uddin
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Kartik R Roy
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Ronald A Hill
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Sagor C Roy
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Xin Gu
- Department of Pathology, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Li Li
- Laboratory of Translational Cancer Research, Tom & Gayle Benson Cancer Center, Ochsner Clinic Foundation, New Orleans, LA, USA
| | - Qian-Jin Zhang
- Department of Biology, Xavier University of Louisiana, New Orleans, LA, USA
| | - Zongbing You
- Department of Structural and Cellular Biology, Tulane University, New Orleans, LA, USA
| | - Yong-Yu Liu
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA, USA.
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Sharaf-Eldin WE, Issa MY, Zaki MS, Kilany A, Fayez AG. Variable predicted pathogenic mechanisms for novel MECP2 variants in RTT patients. J Genet Eng Biotechnol 2022; 20:44. [PMID: 35275316 PMCID: PMC8917248 DOI: 10.1186/s43141-022-00305-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 01/18/2022] [Indexed: 11/10/2022]
Abstract
BACKGROUND Methyl CpG binding protein 2 (MeCP2) is essential for the normal function of mature neurons. Mutations in the MECP2 gene are the main cause of Rett syndrome (RTT). Gene mutations have been identified throughout the gene and the mutation effect is mainly correlated with its type and location. METHODS In this study, a series of in silico algorithms were applied for analyzing the functional consequences of 3 novel gene missense mutations (D121A, S359Y, and P403S) and a rarely reported one with suspicious effect (R133H) on RettBASE. Besides, a ROC curve analysis was performed to investigate the critical factors affecting variant pathogenicity. RESULTS (1) The ROC curve analysis for a retrieved set of MeCP2 variants showed that physicochemical characters do not significantly affect variant pathogenicity; (2) PREM PDI tool revealed that both D121A and R133H mainly contribute to disease progression via reducing MeCP2 affinity to DNA; (3) GPS v5.0 software indicated that P403S may correlate with altered protein phosphorylation; however, no defective protein interaction has been already documented. (4) The applied computational algorithms failed to explore any informative pathogenic mechanism for the S359Y variant. CONCLUSION The conducted approach might provide an efficient prediction model for the effect of MECP2 variants that are located in MBD and CTD.
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Affiliation(s)
- Wessam E. Sharaf-Eldin
- Medical Molecular Genetics Department, Human Genetics and Genome Research institute, National Research Centre, Cairo, 12311 Egypt
| | - Mahmoud Y. Issa
- Clinical Genetics Department, Human Genetics and Genome Research institute, National Research Centre, Cairo, Egypt
| | - Maha S. Zaki
- Clinical Genetics Department, Human Genetics and Genome Research institute, National Research Centre, Cairo, Egypt
| | - Ayman Kilany
- Department of Research on Children with Special Needs, Medical Research Institute, National Research Centre, Cairo, Egypt
| | - Alaaeldin G. Fayez
- Molecular Genetics and Enzymology Department, Human Genetics and Genome Research Institute, National Research Centre, Cairo, Egypt
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Jiang P, Xiao L, Guo Y, Hu R, Zhang BY, He Y. Novel mutations of the Alström syndrome 1 gene in an infant with dilated cardiomyopathy: A case report. World J Clin Cases 2022; 10:2330-2335. [PMID: 35321175 PMCID: PMC8895183 DOI: 10.12998/wjcc.v10.i7.2330] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/21/2021] [Accepted: 01/20/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Alström syndrome (AS) is a rare autosomal recessive disease that is generally induced by mutations of the Alström syndrome 1 (ALMS1) gene. We report a case of AS, extend the spectrum of ALMS1 mutations and highlight the biological role of ALMS1 to explore the relationship between dilated cardiomyopathy (DCM) and mutations in ALMS1.
CASE SUMMARY We present the case of an infant with AS mainly manifesting with DCM that was caused by a novel mutation of the ALMS1 gene. Whole-exome sequencing revealed a simultaneous large deletion and point mutation in ALMS1, leading to frameshift and missense mutations, respectively, rather than nonsense or frameshift mutations, which have been reported previously. Upon optimized anti-remodeling therapy, biohumoral exams and arrhythmic burden of the infant were alleviated at follow-up after 6 mo.
CONCLUSION We identified novel mutations of ALMS1 and extended the spectrum of ALMS1 mutations in an infant with AS.
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Affiliation(s)
- Ping Jiang
- Department Of Cardiology, Zhuzhou Central Hospital, Zhuzhou 412000, Hunan Province, China
| | - Liang Xiao
- Department of Pediatric, Zhuzhou Central Hospital, Zhuzhou 412000, Hunan Province, China
| | - Yuan Guo
- Department Of Cardiology, Zhuzhou Central Hospital, Zhuzhou 412000, Hunan Province, China
| | - Rong Hu
- Department of Medical Ultrasonics, Zhuzhou Central Hospital, Zhuzhou 412000, Hunan Province, China
| | - Bo-Yi Zhang
- Department of Medical Ultrasonics, Zhuzhou Central Hospital, Zhuzhou 412000, Hunan Province, China
| | - Yi He
- Department Of Cardiology, Zhuzhou Central Hospital, Zhuzhou 412000, Hunan Province, China
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Morita S, Yamaguchi K, Akagawa H, Ishikawa T, Funatsu T, Eguchi S, Ishikawa T, Niwa A, Nonaka T, Kawamata T. Triple bypass for multisystem smooth muscle dysfunction syndrome due to Arg179His ACTA2 mutation. J Stroke Cerebrovasc Dis 2022; 31:106402. [PMID: 35248443 DOI: 10.1016/j.jstrokecerebrovasdis.2022.106402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 12/29/2021] [Accepted: 02/06/2022] [Indexed: 11/27/2022] Open
Abstract
Missense mutations in the smooth muscle-specific isoform of the alpha-actin (ACTA2) gene, which encodes smooth muscle actin, congenitally cause systemic smooth muscle dysfunction, leading to multiple systemic smooth muscle dysfunction syndrome. This disease is often diagnosed through the development of congenital mydriasis, patent ductus arteriosus, or thoracic aortic aneurysm at a young age. Some patients develop cerebrovascular lesions, also known as ACTA2 cerebral arteriopathy, which cause ischemic stroke and require surgical revascularization. However, an effective and safe treatment has not yet been established owing to the rarity of the disease. Furthermore, most reports of this disease involve children, with only a few reports on adults and few detailed reports on treatment outcomes published to date. We report a 46-year-old woman with ACTA2 cerebral arteriopathy caused by Arg179His, the most common mutation in this disease; she is the oldest patient reported with this disease to the best of our knowledge. The patient was diagnosed with multiple systemic smooth muscle dysfunction syndrome and ACTA2 cerebral arteriopathy after experiencing a stroke in the right cingulate gyrus. She underwent direct triple bypass with three anastomoses of the right superficial temporal artery to the middle and anterior cerebral arteries. She developed an ischemic stroke as a postoperative complication.The efficacy and safety of this procedure have not been clearly confirmed owing to the frailty of the donor superficial temporal artery and the poor development of collateral circulation; however, direct bypass should be considered a treatment option for patients experiencing progressive multiple strokes.
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Affiliation(s)
- Shuhei Morita
- Department of Neurosurgery, Tokyo Women's Medical University, Tokyo Women's Medical University Institute for Integrated Medical Sciences, Tokyo, Japan
| | - Koji Yamaguchi
- Department of Neurosurgery, Tokyo Women's Medical University, Tokyo, Japan.
| | - Hiroyuki Akagawa
- Department of Neurosurgery, Tokyo Women's Medical University, Tokyo Women's Medical University Institute for Integrated Medical Sciences, Tokyo, Japan
| | - Tatsuya Ishikawa
- Department of Neurosurgery, Tokyo Women's Medical University, Tokyo, Japan
| | - Takayuki Funatsu
- Department of Neurosurgery, Tokyo Women's Medical University, Tokyo, Japan
| | - Seiichirou Eguchi
- Department of Neurosurgery, Tokyo Women's Medical University, Tokyo, Japan
| | - Tomomi Ishikawa
- Department of Neurosurgery, Tokyo Women's Medical University, Tokyo, Japan
| | - Akihiro Niwa
- Department of Neurosurgery, Tokyo Women's Medical University, Tokyo, Japan
| | - Taku Nonaka
- Department of Neurosurgery, Tokyo Women's Medical University, Tokyo, Japan
| | - Takakazu Kawamata
- Department of Neurosurgery, Tokyo Women's Medical University, Tokyo, Japan
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Kunowska N, Stelzl U. Decoding the cellular effects of genetic variation through interaction proteomics. Curr Opin Chem Biol 2022; 66:102100. [PMID: 34801969 DOI: 10.1016/j.cbpa.2021.102100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/07/2021] [Accepted: 10/14/2021] [Indexed: 12/24/2022]
Abstract
It is often unclear how genetic variation translates into cellular phenotypes, including how much of the coding variation can be recovered in the proteome. Proteogenomic analyses of heterogenous cell lines revealed that the genetic differences impact mostly the abundance and stoichiometry of protein complexes, with the effects propagating post-transcriptionally via protein interactions onto other subunits. Conversely, large scale binary interaction analyses of missense variants revealed that loss of interaction is widespread and caused by about 50% disease-associated mutations, while deep scanning mutagenesis of binary interactions identified thousands of interaction-deficient variants per interaction. The idea that phenotypes arise from genetic variation through protein-protein interaction is therefore substantiated by both forward and reverse interaction proteomics. With improved methodologies, these two approaches combined can close the knowledge gap between nucleotide sequence variation and its functional consequences on the cellular proteome.
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Affiliation(s)
- Natalia Kunowska
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Austria
| | - Ulrich Stelzl
- Institute of Pharmaceutical Sciences, Pharmaceutical Chemistry, University of Graz, Austria; BioTechMed-Graz, Austria; Field of Excellence BioHealth - University of Graz, Austria.
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Mondejar-Lopez P, Zolin A, Garcia-Marcos PW, Pastor-Vivero MD, Rosa-Silvestre M, de Asis Sanchez-Martinez F, Salvatore D, Cimino G, Majo F, Sole-Jover A, Asensio de la Cruz O, Calderazzo MA, Pizzamiglio G, Castillo-Corullon S, Alvarez-Fernandez A, Gartner S, Padoan R, Carnovale V, Salvatore M, Moya-Quiles MR, Orenti A, Glover G, Sanchez-Solis M. Geographic distribution and phenotype of European people with cystic fibrosis carrying A1006E mutation. Respir Med 2022; 192:106736. [PMID: 35032736 DOI: 10.1016/j.rmed.2022.106736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 01/03/2022] [Accepted: 01/04/2022] [Indexed: 10/19/2022]
Abstract
BACKGROUND A1006E is a Cystic Fibrosis (CF) mutation that is still not widely known. We report phenotypic features and geographic distribution of the largest cohort of people with CF (pwCF) carrying A1006E to date. METHODS Study of European pwCF carrying A1006E mutation, included in the European CF Society Patient Registry (ECFSPR). Genotype, ancestries and all variables recorded were compared to a cohort of F508del/F508del patients. Rate of decline in percentage-of-predicted FEV1 (ppFEV1) was also analyzed using the 2010-2017 ECFSPR. RESULTS 44 pwCF carrying A1006E were reported (59% males), median age 33 years old (3-58), 54.5% Spanish and 40.9% Italian, most with ancestry in Murcia (Spain) and Lazio (Italy) regions. Compared to F508del homozygous, A1006E-pwCF were significantly older (75% vs. 52.5% ≥ 18 years old) and diagnosed at later median age (6.98 vs. 0.29 years); showed lower rates of meconium ileus (2.33% vs. 17.7%), pancreatic insufficiency (27.91% vs. 99.26%), diabetes (2.33% vs. 21.98%), liver disease (6.98% vs. 36.72%) and Pseudomonas aeruginosa chronic colonization (30.95% vs. 42.51%); and presented better nutrition (BMI z-score 0.44 vs. -0.43) and ppFEV1 (90.8% vs. 78.6%), with 18.9% (most >40 years old) having a ppFEV1<70%. Additional ppFEV1 decline (0.96% per year) was attributed to F508del/F508del genotype (p = 0.0007). None died or needed organ transplantation during the study period. CONCLUSIONS A1006E-pwCF are mainly of Western Mediterranean Spanish and Italian descent. When compared with F508del/F508del-pwCF, they usually have a milder form of the disease, associated with pancreatic sufficiency and slower FEV1 decline. However, some will develop progressive respiratory impairment during adulthood.
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Affiliation(s)
- Pedro Mondejar-Lopez
- Pediatric Pulmonology and Cystic Fibrosis Unit, Hospital Clinico Universitario Virgen de la Arrixaca, Murcia, Spain; Department of Surgery, Paediatrics, Obstetrics and Genecology, Universidad de Murcia, Spain. Biomedical Research Institute of Murcia (IMIB), Murcia, Spain.
| | - Anna Zolin
- Department of Clinical Sciences and Community Health, Laboratory of Medical Statistics, Epidemiology and Biometry G. A. Maccacaro, University of Milan, Milan, Italy
| | - Patricia W Garcia-Marcos
- Pediatric Pulmonology and Cystic Fibrosis Unit, Hospital Clinico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - Mª Dolores Pastor-Vivero
- Osakidetza. Organizacion Sanitaria Integrada Ezkerraldea-Enkarterri-Cruces, Hospital Universitario Cruces, Paediatrics, Cystic Fibrosis Unit, Bizkaia, Spain
| | - Maria Rosa-Silvestre
- Pediatric Pulmonology and Cystic Fibrosis Unit, Hospital Clinico Universitario Virgen de la Arrixaca, Murcia, Spain
| | | | | | - Giuseppe Cimino
- Lazio Reference Center for Cystic Fibrosis, Policlinico Umberto I University Hospital, Rome, Italy
| | - Fabio Majo
- Cystic Fibrosis Centre, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Amparo Sole-Jover
- Lung Transplantation and Cystic Fibrosis Unit, Hospital Universitario La Fe, Universidad de Valencia, Valencia, Spain
| | - Oscar Asensio de la Cruz
- Cystic Fibrosis Unit, Pediatric Pulmonology and Allergy Unit, Hospital Universitari Parc Tauli, Sabadell, Barcelona, Spain
| | | | - Giovanna Pizzamiglio
- Cystic Fibrosis Center - Adult Unit, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | | | - Antonio Alvarez-Fernandez
- Adult Cystic Fibrosis Unit, Pulmonology Service, Hospital Universitari Vall D'Hebron, Barcelona, Spain
| | - Silvia Gartner
- Pediatric Pulmonology and Cystic Fibrosis Unit, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Rita Padoan
- Department of Paediatrics, Cystic Fibrosis Regional Support Centre, University of Brescia, ASST Spedali Civili Brescia, Brescia, Italy
| | - Vincenzo Carnovale
- Department of Translational Medical Science, Cystic Fibrosis Centre, Adult Unit, University of Naples "Federico II", Italy
| | - Marco Salvatore
- Italian Cystic Fibrosis Registry, Rome, Italy, National Centre for Rare Diseases, Undiagnosed Rare Diseases Unit, Istituto Superiore di Sanità, Rome, Italy
| | - Mª Rosa Moya-Quiles
- Immunology Service, University Clinical Hospital Virgen de la Arrixaca-Biomedical Research Institute of Murcia (IMIB), Murcia, Spain
| | - Annalisa Orenti
- Department of Clinical Sciences and Community Health, Laboratory of Medical Statistics, Epidemiology and Biometry G. A. Maccacaro, University of Milan, Milan, Italy
| | - Guillermo Glover
- Biochemistry and Clinical Genetic Centre. Hospital Clinico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - Manuel Sanchez-Solis
- Pediatric Pulmonology and Cystic Fibrosis Unit, Hospital Clinico Universitario Virgen de la Arrixaca, Murcia, Spain; Department of Surgery, Paediatrics, Obstetrics and Genecology, Universidad de Murcia, Spain. Biomedical Research Institute of Murcia (IMIB), Murcia, Spain
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Kulkarni S, Hegde R, Hegde S, Kulkarni SS, Hanagvadi S, Das KK, Kolagi S, Gai PB, Bulagouda R. Mutation analysis and characterisation of F9 gene in haemophilia- B population of India. Blood Res 2021; 56:252-258. [PMID: 34880139 PMCID: PMC8721457 DOI: 10.5045/br.2021.2021016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 08/18/2021] [Accepted: 08/25/2021] [Indexed: 11/17/2022] Open
Abstract
Background Hemophilia B (HB) is an X-linked bleeding disorder resulting from coagulation factor IX defects. Over 3,000 pathogenic, HB-associated mutations in the F9 gene have been identified. We aimed to investigate the role of F9 variants in 150 HB patients using sequencing technology. Methods F9 gene sequences were amplified from peripheral blood-derived DNA and sequenced on an Applied Biosystems (ABI) 3500 Sanger sequencing platform. Functional and structural predictions of mutant FIX were analyzed. Results Among 150 HB patients, 102 (68%), 30 (20%), and 18 (12%) suffered from severe, moderate, and mild HB, respectively. Genetic analysis identified 16 mutations, including 3 novel mutations. Nine mutations (7 missense and 2 stop-gain) were found to be pathogenic. Only 3 mutations (c.127C>T, c.470G>A, and c.1070G>A) were associated with different severities. While 2 mutations were associated with mild HB cases (c.304C>T and c.580A>G), 2 (c.195G>A and c.1385A>G) and 3 mutations (c.223C>T, c.1187G>A, and c.1232G>A) resulted in moderate and severe disease, respectively. Additionally, 1 mutation each was associated with mild-moderate (c.*1110A>G) and mild-severe HB disease (c.197A>T), 4 mutations were associated with moderate-severe HB cases (c.314A>G, c.198A>T, c.676C>T, and c.1094C>A). FIX concentrations were lower in the mutated group (5.5±2.5% vs. 8.0±2.5%). Novel p.E66D and p.S365 mutations were predicted to be pathogenic based on changes in FIX structure and function. Conclusion Novel single nucleotide polymorphisms (SNPs) largely contributed to the pathogenesis of HB. Our study strongly suggests that population-based genetic screening will be particularly helpful to identify risk prediction and carrier detection tools for Indian HB patients.
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Affiliation(s)
- Sujayendra Kulkarni
- Human Genetics Laboratory, Department of Anatomy, Shri B.M Patil Medical College, Hospital and Research Centre, BLDE (Deemed to be University), Vijayapura, India.,Division of Human Genetics (Central Research Lab), Bagalkot, India
| | - Rajat Hegde
- Karnataka Institute for DNA Research (KIDNAR), Dharwad, India
| | - Smita Hegde
- Karnataka Institute for DNA Research (KIDNAR), Dharwad, India
| | | | - Suresh Hanagvadi
- Department of Pathology, J. J. M. Medical College, Davangere, Karnataka, India
| | - Kusal K Das
- Laboratory of Vascular Physiology and Medicine, Department of Physiology, Shri B. M. Patil Medical College, Hospital and Research Centre, BLDE (Deemed to be University), Vijayapura, India
| | - Sanjeev Kolagi
- Department of Anatomy, S. Nijaliangappa Medical College, HSK Hospital and Research Center, Bagalkot, India
| | - Pramod B Gai
- Karnataka Institute for DNA Research (KIDNAR), Dharwad, India
| | - Rudragouda Bulagouda
- Human Genetics Laboratory, Department of Anatomy, Shri B.M Patil Medical College, Hospital and Research Centre, BLDE (Deemed to be University), Vijayapura, India
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Chen F, Yang M, Wen Z, Yu C. Identification of a novel ENG gene mutation (c.1550_1551dupTG, p.S518*) in a Chinese family with hereditary hemorrhagic telangiectasia. Med Clin (Barc) 2021; 157:537-541. [PMID: 34728086 DOI: 10.1016/j.medcli.2021.07.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 07/06/2021] [Accepted: 07/07/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND It is very important to diagnose Hereditary hemorrhagic telangiectasia (HHT) early through appropriate screening and preventive treatment of a patient and their affected family members. This study aimed to report on a case of a Chinese family with heterozygous ENG-related HHT. METHODS Gene mutations were identified by whole-exome sequencing and physical examination were conducted to reveal the clinical symptoms. RESULTS Physical examination revealed symptomatic anaemia, coagulation system disorder and multiple red or pink spots reflecting telangiectases on the eyelids, tongue, palate and nasal cavity. Nine other affected relatives were identified in examining his family tree, among which three family members had died due to nose bleeding and one member presented symptomatic anaemia requiring blood transfusions. A novel heterozygous variation c.1550_1551dupTG (p.S518*) in ENG gene was identified. CONCLUSIONS The patient and his daughter were confirmed to have heterozygous ENG-related HHT and the novel ENG heterozygous variant may play an important role on the severe symptoms of HHT. However, further case follow-up and functional studies should be conducted to confirm these mechanismal hypotheses.
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Affiliation(s)
- Fang Chen
- Department of Otorhinolaryngology-Head and Neck Surgery, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Mengxue Yang
- Department of Otorhinolaryngology-Head and Neck Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Zhong Wen
- Department of Otorhinolaryngology-Head and Neck Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China.
| | - Chaosheng Yu
- Department of Otorhinolaryngology-Head and Neck Surgery, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China.
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41
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Inaba H, Nishikawa S, Shinozawa K, Shinohara S, Nakazawa F, Amano K, Kinai E. Coagulation assay discrepancies in Japanese patients with non-severe hemophilia A. Int J Hematol 2021; 115:173-187. [PMID: 34751920 DOI: 10.1007/s12185-021-03256-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 10/29/2021] [Accepted: 10/29/2021] [Indexed: 11/29/2022]
Abstract
Patients with non-severe hemophilia A often show discrepancies in factor VIII (FVIII) activity. However, information on variant-specific coagulation assay characteristics in Japanese patients is limited. Pathogenic variants were classified into three groups, thrombin-cleavage site (TC), A1-A2-A3 interface (IF), and non-discrepant, with reference to previous studies. Cutoff values for the one-stage assay (OSA)/chromogenic substrate assay (CSA) ratio, which is suitable for distinguishing discrepancies, were determined for all five aPTT reagents. TGA and CWA parameters and bleeding scores were compared between groups. Two of the 39 patients with non-severe hemophilia A (5%) were classified as TC, 10 (26%) as IF, and 27 (69%) as non-discrepant. The OSA/CSA cutoff values between the groups varied widely by aPTT reagent and tended to be relatively low compared to previous studies. As an indicator of bleeding tendency, TGA had a low correlation coefficient for the IF variant, but this was not significant and was comparable to FVIII activity and CWA. Moreover, various parameters and bleeding tendency differed among patients with the same variants. Thus, our findings suggest that it is difficult to adequately assess the bleeding tendency of individual patients, even with the various assessments currently available.
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Affiliation(s)
- Hiroshi Inaba
- Department of Laboratory Medicine, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
| | - Satomi Nishikawa
- Scientific Research, Scientific Affairs, Sysmex Corporation, Kobe, Japan
| | - Keiko Shinozawa
- Department of Laboratory Medicine, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - Sho Shinohara
- Reagent Engineering, Sysmex Corporation, Kobe, Japan
| | - Fumie Nakazawa
- Scientific Research, Scientific Affairs, Sysmex Corporation, Kobe, Japan
| | - Kagehiro Amano
- Department of Laboratory Medicine, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
| | - Ei Kinai
- Department of Laboratory Medicine, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan
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Huang Z, Chen F, Xie M, Zhang H, Zhuang Y, Huang C, Li X, Liu H, Chen Z. The I510V mutation in KLHL10 in a patient with oligoasthenoteratozoospermia. J Reprod Dev 2021; 67:313-318. [PMID: 34433733 PMCID: PMC8568611 DOI: 10.1262/jrd.2021-063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Oligoasthenoteratozoospermia is a human infertility syndrome caused by defects in spermatogenesis, spermiogenesis, and sperm maturation, and its etiology remains unclear. Kelch-like 10
(KLHL10) is a component of ubiquitin ligase E3 10 (KLHL10) and plays an important role in male fertility. Deletion or mutation of the Klhl10 gene in
Drosophila or mice results in defects in spermatogenesis or sperm maturation. However, the molecular mechanisms by which KLHL10 functions remain elusive. In this study, we
identified a missense mutation (c.1528A→G, p.I510V) in exon 5 of KLHL10, which is associated with oligoasthenoteratozoospermia in humans. To investigate the effects of this
mutation on KLHL10 function and spermatogenesis and/or spermiogenesis, we generated mutant mice duplicating the amino acid conversion using the clustered regularly interspaced palindromic
repeat/caspase 9 (CRISPR/Cas9) system and designated them Klhl10I510V mice. However, the Klhl10I510V mice did not exhibit any defects in testis development,
spermatogenesis, or sperm motility at ten-weeks-of-age, suggesting that this mutation does not disrupt the KLHL10 function, and may not be the cause of male infertility in the affected
individual with oligoasthenoteratozoospermia.
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Affiliation(s)
- Zicong Huang
- Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, P. R. China
| | - Feilong Chen
- Department of Pathology, Panyu Maternal and Child Care Service Centre of Guangzhou, Guangzhou 511499, P. R. China
| | - Minyu Xie
- Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, P. R. China
| | - Hanbin Zhang
- Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, P. R. China
| | - Yuge Zhuang
- Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, P. R. China
| | - Chuyu Huang
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, P. R. China
| | - Xuemei Li
- Reproductive center, Affiliated Shenzhen Maternity & Child Healthcare Hospital, Southern Medical University (Shenzhen Maternity & Child Healthcare Hospital), Shenzhen 518017, P. R. China
| | - Hong Liu
- Reproductive center, Affiliated Shenzhen Maternity & Child Healthcare Hospital, Southern Medical University (Shenzhen Maternity & Child Healthcare Hospital), Shenzhen 518017, P. R. China
| | - Zhenguo Chen
- Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, P. R. China
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Mikhailova VB, Karpushev AV, Vavilova VD, Klimenko ES, Tulintseva T, Yudina YS, Vasichkina ES, Zhorov BS, Kostareva A. Functional Analysis of SCN5A Genetic Variants Associated with Brugada Syndrome. Cardiology 2021; 147:35-46. [PMID: 34628415 DOI: 10.1159/000519857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 09/23/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND Brugada syndrome (BrS) is a rare inherited cardiac arrhythmia with increased risk of sudden cardiac death. Mutations in gene SCN5A, which encodes the α-subunit of cardiac voltage-gated sodium channel NaV1.5, have been identified in over 20% of patients with BrS. However, only a small fraction of NaV1.5 variants, which are associated with BrS, are characterized in electrophysiological experiments. RESULTS Here we explored variants V281A and L1582P, which were found in our patients with BrS, and variants F543L and K1419E, which are reportedly associated with BrS. Heterologous expression of the variants in CHO-K1 cells and the Western blot analysis demonstrated that each variant appeared at the cell surface. We further measured sodium current in the whole-cell voltage clamp configuration. Variant F543L produced robust sodium current with a hyperpolarizing shift in the voltage dependence of steady-state fast inactivation. Other variants did not produce detectable sodium currents, indicating a complete loss of function. In a recent cryoEM structure of the hNaV1.5 channel, residues V281, K1419, and L1582 are in close contacts with residues whose mutations are reportedly associated with BrS, indicating functional importance of respective contacts. CONCLUSIONS Our results support the notion that loss of function of NaV1.5 or decrease of the channel activity is involved in the pathogenesis of BrS.
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Affiliation(s)
| | - Alexey V Karpushev
- Almazov National Medical Research Centre, St. Petersburg, Russian Federation
| | - Viola D Vavilova
- Almazov National Medical Research Centre, St. Petersburg, Russian Federation
| | | | - Tatyana Tulintseva
- Almazov National Medical Research Centre, St. Petersburg, Russian Federation
| | - Yulia S Yudina
- Almazov National Medical Research Centre, St. Petersburg, Russian Federation
| | - Elena S Vasichkina
- Almazov National Medical Research Centre, St. Petersburg, Russian Federation
| | - Boris S Zhorov
- Almazov National Medical Research Centre, St. Petersburg, Russian Federation.,Sechenov Institute of Evolutionary Physiology and Biochemistry, RAS, St. Petersburg, Russian Federation.,Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Anna Kostareva
- Almazov National Medical Research Centre, St. Petersburg, Russian Federation.,Karolinska Institute, Stockholm, Sweden
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Nicotera AG, Spoto G, Calì F, Romeo G, Musumeci A, Vinci M, Fiumara A, Barone R, Di Rosa G, Musumeci SA. A Novel Homozygous ALG12 Mutation in a Patient with CDG Type Ig: New Report of a Case with a Mild Phenotype. Mol Syndromol 2021; 12:327-332. [PMID: 34602961 DOI: 10.1159/000516606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 04/18/2021] [Indexed: 11/19/2022] Open
Abstract
Congenital disorders of glycosylation (CDG) are a group of rare genetic diseases caused by the deficiency of enzymes involved in the biosynthesis or remodeling of the glycan moieties of glycoconjugates. Most of CDG are autosomal recessive; however, few of them show autosomal dominant or X-linked inheritance. ALG12-CDG is an autosomal recessive inherited defect caused by a deficiency in the α-mannosyltransferase, dolichyl-P-mannose: Man7-GlcNAc-2-PP-dolichyl-alpha-6-mannosyltransferase (mannosyltransferase 8), which determines Man7GlcNAc2-PP-dolichol accumulation in tissues including fibroblasts. The clinical features of ALG12-CDG include dysmorphic features, developmental delay, hypotonia, progressive microcephaly, hypogammaglobulinemia, coagulopathies, and failure to thrive. Herein, we describe the case of a Sicilian patient with a milder phenotype bearing an ALG12 homozygous mutation. To date, including this patient, only 16 cases have been described with this form of CDG. Furthermore, our study contributes to understanding the milder ALG12-CDG cases and to further expanding the genotype-phenotype spectrum.
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Affiliation(s)
- Antonio Gennaro Nicotera
- Unit of Child Neurology and Psychiatry, Department of Human Pathology in Adult and Developmental Age "Gaetano Barresi", University of Messina, Messina, Italy
| | - Giulia Spoto
- Unit of Child Neurology and Psychiatry, Department of Human Pathology in Adult and Developmental Age "Gaetano Barresi", University of Messina, Messina, Italy
| | | | - Giusi Romeo
- Oasi Research Institute - IRCCS, Troina, Italy
| | | | | | - Agata Fiumara
- Department of Clinical and Experimental Medicine, Regional Referral Center for Inborn Errors Metabolism, Pediatric Clinic, University of Catania, Catania, Italy
| | - Rita Barone
- Department of Clinical and Experimental Medicine, Regional Referral Center for Inborn Errors Metabolism, Pediatric Clinic, University of Catania, Catania, Italy
| | - Gabriella Di Rosa
- Unit of Child Neurology and Psychiatry, Department of Human Pathology in Adult and Developmental Age "Gaetano Barresi", University of Messina, Messina, Italy
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Yu Y, Zheng M, Zhu W, Zhao F, Guan B, Shen Q, Yang F, He Q, Li X. Hereditary leiomyomatosis and renal cell cancer (HLRCC): Case series and review of the literature. Urol Oncol 2021; 39:791.e9-791.e16. [PMID: 34462205 DOI: 10.1016/j.urolonc.2021.07.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 06/02/2021] [Accepted: 07/26/2021] [Indexed: 11/23/2022]
Abstract
BACKGROUND Hereditary leiomyomatosis and renal cell cancer (HLRCC) is an autosomal dominant syndrome caused by heterozygous pathogenic germline variants in the fumarate hydratase (FH) gene. It is characterized by cutaneous and uterine leiomyomas and an increased risk of developing renal cell carcinoma (RCC). HLRCC-related RCC tends to be aggressive. To date, only a few publications have described HLRCC-related RCC, and the clinical, morphological and molecular aspects of HLRCC-related RCC need to be further studied. METHODS We retrospectively analyzed the clinical and pathological data of 3 patients with HLRCC recently diagnosed. Immunohistochemistry and Whole-exome sequencing was performed on 3 patients. The function of the DNA variant was predicted in silico. RESULTS We reported 3 patients from unrelated Chinese families, with HLRCC-related RCC and identified 3 different germline FH mutations (2 missense and 1 nonsense). A novel missense mutation of FH gene (c.454A>G, p.N152D) was predicted to be probably pathogenic and deleterious by multiple protein function predicting software. This study indicated that the novel mutation may be responsible for the occurrence of HLRCC-related RCC. 100% (2/2) female RCC patients had uterine fibroids. No cutaneous manifestations were identified. CONCLUSION We indicate that germline screening should be encouraged in early-onset patients. Clinicopathological data, such as family history and immunohistochemical results can provide valuable clinical information for the differential diagnosis of HLRCC-associated RCC in advance.
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Silva F, Ferreira F, Faria P, Sobral I, Rodrigues M, Pratas J, Silva JF, Grazina M, Moura Pereira J, Girão H, Pereira P. MYOC Gene Sequencing Analysis in Primary Open-Angle Glaucoma Patients from the Centre Region of Portugal. ACTA MEDICA PORT 2021; 34:586-591. [PMID: 33725475 DOI: 10.20344/amp.14922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/29/2020] [Accepted: 12/03/2020] [Indexed: 11/20/2022]
Abstract
INTRODUCTION Primary open-angle glaucoma is the most frequent subtype of glaucoma. Relatives of primary open-angle glaucoma patients have an increased risk of developing the disease, suggesting a genetic predisposition to the disease. MYOC was the first primary open-angle glaucoma-causing gene identified. This study aimed to identify sequence variations in the MYOC gene that may be responsible for the phenotype in a group of primary open-angle glaucoma patients from the Centre Region of Portugal. MATERIAL AND METHODS The three coding exons and the proximal splicing junctions of the MYOC gene were studied using a PCR sequencing approach in a group of 99 primary open-angle glaucoma patients. RESULTS The sequencing analysis enabled the identification of 20 variants, including four in the promoter region, seven in the introns and nine in exons one and three, of which four were missense variants. DISCUSSION Initially, all four missense sequence variations identified were considered candidates to glaucoma causing disease mutations. However, after literature review, only variant c.1334C>T (Ala445Val) remained as likely responsible for mild late-onset normal tension glaucoma. CONCLUSION This is the first study performed in a group of primary open-angle glaucoma patients from the Centre Region of Portugal, contributing to the identification of one genetic variant in the MYOC gene and reinforcing the hypothesis that normal tension glaucoma could be also due to MYOC gene mutations.
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Affiliation(s)
- Filipe Silva
- Institute for Clinical and Biomedical Research (iCBR). Faculty of Medicine. University of Coimbra. Coimbra. Portugal
| | - Filipa Ferreira
- Institute for Clinical and Biomedical Research (iCBR). Faculty of Medicine. University of Coimbra. Coimbra. Portugal
| | - Pedro Faria
- Ophthalmology Department. Centro Hospitalar e Universitário de Coimbra. Coimbra. Portugal
| | - Isa Sobral
- Ophthalmology Department. Centro Hospitalar e Universitário de Coimbra. Coimbra. Portugal
| | - Mariana Rodrigues
- Institute for Clinical and Biomedical Research (iCBR). Faculty of Medicine. University of Coimbra. Coimbra. Portugal
| | - João Pratas
- Laboratory of Mitochondrial BioMedicine and Theranostics. Center for Neurosciences and Cell Biology. Coimbra. Portugal
| | - João Filipe Silva
- Ophthalmology Department. Centro Hospitalar e Universitário de Coimbra. Coimbra. Portugal
| | - Manuela Grazina
- Laboratory of Mitochondrial BioMedicine and Theranostics. Center for Neurosciences and Cell Biology. Coimbra. Institute of Biochemistry. Faculty of Medicine. University of Coimbra. Coimbra. Portugal
| | - José Moura Pereira
- Ophthalmology Department. Centro Hospitalar e Universitário de Coimbra. Coimbra. Portugal
| | - Henrique Girão
- Institute for Clinical and Biomedical Research (iCBR). Faculty of Medicine. University of Coimbra. Coimbra. Portugal
| | - Paulo Pereira
- Institute for Clinical and Biomedical Research (iCBR). Faculty of Medicine. University of Coimbra. Coimbra. Portugal
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Vo TTM, Nguyen TV, Amoroso G, Ventura T, Elizur A. Deploying new generation sequencing for the study of flesh color depletion in Atlantic Salmon (Salmo salar). BMC Genomics 2021; 22:545. [PMID: 34271869 PMCID: PMC8285899 DOI: 10.1186/s12864-021-07884-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 06/28/2021] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND The flesh pigmentation of farmed Atlantic salmon is formed by accumulation of carotenoids derived from commercial diets. In the salmon gastrointestinal system, the hindgut is considered critical in the processes of carotenoids uptake and metabolism. In Tasmania, flesh color depletion can noticeably affect farmed Atlantic salmon at different levels of severity following extremely hot summers. In this study, RNA sequencing (RNA-Seq) was performed to investigate the reduction in flesh pigmentation. Library preparation is a key step that significantly impacts the effectiveness of RNA sequencing (RNA-Seq) experiments. Besides the commonly used whole transcript RNA-Seq method, the 3' mRNA-Seq method is being applied widely, owing to its reduced cost, enabling more repeats to be sequenced at the expense of lower resolution. Therefore, the output of the Illumina TruSeq kit (whole transcript RNA-Seq) and the Lexogen QuantSeq kit (3' mRNA-Seq) was analyzed to identify genes in the Atlantic salmon hindgut that are differentially expressed (DEGs) between two flesh color phenotypes. RESULTS In both methods, DEGs between the two color phenotypes were associated with metal ion transport, oxidation-reduction processes, and immune responses. We also found DEGs related to lipid metabolism in the QuantSeq method. In the TruSeq method, a missense mutation was detected in DEGs in different flesh color traits. The number of DEGs found in the TruSeq libraries was much higher than the QuantSeq; however, the trend of DEGs in both library methods was similar and validated by qPCR. CONCLUSIONS Flesh coloration in Atlantic salmon is related to lipid metabolism in which apolipoproteins, serum albumin and fatty acid-binding protein genes are hypothesized to be linked to the absorption, transport and deposition of carotenoids. Our findings suggest that Grp could inhibit the feeding behavior of low color-banded fish, resulting in the dietary carotenoid shortage. Several SNPs in genes involving in carotenoid-binding cholesterol and oxidative stress were detected in both flesh color phenotypes. Regarding the choice of the library preparation method, the selection criteria depend on the research design and purpose. The 3' mRNA-Seq method is ideal for targeted identification of highly expressed genes, while the whole RNA-Seq method is recommended for identification of unknown genes, enabling the identification of splice variants and trait-associated SNPs, as we have found for duox2 and duoxa1.
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Affiliation(s)
- Thu Thi Minh Vo
- GeneCology Research Centre, University of the Sunshine Coast, Queensland, Sunshine Coast, Australia.,School of Science, Technology and Engineering, University of the Sunshine Coast, Sunshine Coast, Queensland, Australia.,School of Biotechnology, International University, Viet Nam National University, 700000, Ho Chi Minh City, Vietnam
| | - Tuan Viet Nguyen
- Centre for AgriBiosciences, AgriBio, Agriculture Victoria, Victoria, 3083, Bundoora, Australia
| | | | - Tomer Ventura
- GeneCology Research Centre, University of the Sunshine Coast, Queensland, Sunshine Coast, Australia. .,School of Science, Technology and Engineering, University of the Sunshine Coast, Sunshine Coast, Queensland, Australia.
| | - Abigail Elizur
- GeneCology Research Centre, University of the Sunshine Coast, Queensland, Sunshine Coast, Australia.
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McConnell H, Andrews TD, Field MA. Efficacy of computational predictions of the functional effect of idiosyncratic pharmacogenetic variants. PeerJ 2021; 9:e11774. [PMID: 34316407 PMCID: PMC8286708 DOI: 10.7717/peerj.11774] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 06/23/2021] [Indexed: 01/04/2023] Open
Abstract
Background Pharmacogenetic variation is important to drug responses through diverse and complex mechanisms. Predictions of the functional impact of missense pharmacogenetic variants primarily rely on the degree of sequence conservation between species as a primary discriminator. However, idiosyncratic or off-target drug-variant interactions sometimes involve effects that are peripheral or accessory to the central systems in which a gene functions. Given the importance of sequence conservation to functional prediction tools-these idiosyncratic pharmacogenetic variants may violate the assumptions of predictive software commonly used to infer their effect. Methods Here we exhaustively assess the effectiveness of eleven missense mutation functional inference tools on all known pharmacogenetic missense variants contained in the Pharmacogenomics Knowledgebase (PharmGKB) repository. We categorize PharmGKB entries into sub-classes to catalog likely off-target interactions, such that we may compare predictions across different variant annotations. Results As previously demonstrated, functional inference tools perform variably across the complete set of PharmGKB variants, with large numbers of variants incorrectly classified as 'benign'. However, we find substantial differences amongst PharmGKB variant sub-classes, particularly in variants known to cause off-target, type B adverse drug reactions, that are largely unrelated to the main pharmacological action of the drug. Specifically, variants associated with off-target effects (hence referred to as off-target variants) were most often incorrectly classified as 'benign'. These results highlight the importance of understanding the underlying mechanism of pharmacogenetic variants and how variants associated with off-target effects will ultimately require new predictive algorithms. Conclusion In this work we demonstrate that functional inference tools perform poorly on pharmacogenetic variants, particularly on subsets enriched for variants causing off-target, type B adverse drug reactions. We describe how to identify variants associated with off-target effects within PharmGKB in order to generate a training set of variants that is needed to develop new algorithms specifically for this class of variant. Development of such tools will lead to more accurate functional predictions and pave the way for the increased wide-spread adoption of pharmacogenetics in clinical practice.
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Affiliation(s)
- Hannah McConnell
- John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia
| | - T Daniel Andrews
- John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia
| | - Matt A Field
- Australian Institute of Tropical Health and Medicine, Centre for Tropical Bioinformatics and Molecular Biology, James Cook University, Smithfield, Australia.,Immunogenomics Lab, Garvan Institute of Medical Research, Darlinghurst, NSW, Australia
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Mahfood M, Chouchen J, Kamal Eddine Ahmad Mohamed W, Al Mutery A, Harati R, Tlili A. Whole exome sequencing, in silico and functional studies confirm the association of the GJB2 mutation p.Cys169Tyr with deafness and suggest a role for the TMEM59 gene in the hearing process. Saudi J Biol Sci 2021; 28:4421-4429. [PMID: 34354426 PMCID: PMC8324942 DOI: 10.1016/j.sjbs.2021.04.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 04/11/2021] [Accepted: 04/12/2021] [Indexed: 12/25/2022] Open
Abstract
The development of next generation sequencing techniques has facilitated the detection of mutations at an unprecedented rate. These efficient tools have been particularly beneficial for extremely heterogeneous disorders such as autosomal recessive non-syndromic hearing loss, the most common form of genetic deafness. GJB2 mutations are the most common cause of hereditary hearing loss. Amongst them the NM_004004.5: c.506G > A (p.Cys169Tyr) mutation has been associated with varying severity of hearing loss with unclear segregation patterns. In this study, we report a large consanguineous Emirati family with severe to profound hearing loss fully segregating the GJB2 missense mutation p.Cys169Tyr. Whole exome sequencing (WES), in silico, splicing and expression analyses ruled out the implication of any other variants and confirmed the implication of the p.Cys169Tyr mutation in this deafness family. We also show preliminary murine expression analysis that suggests a link between the TMEM59 gene and the hearing process. The present study improves our understanding of the molecular pathogenesis of hearing loss. It also emphasizes the significance of combining next generation sequencing approaches and segregation analyses especially in the diagnosis of disorders characterized by complex genetic heterogeneity.
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Key Words
- ARNSHL, autosomal recessive non-syndromic hearing loss
- Actb, Actin beta
- BAM, Binary Alignment Map
- BWA, Burrows-Wheeler Aligner
- C1QTNF9, C1q and TNF related 9
- Cx26, Connexin 26
- ESRRAP2, Estrogen-Related Receptor Alpha Pseudogene 2
- GJB2 gene
- GJB2, Gap Junction Protein Beta 2
- HHLA1, HERV-H LTR-Associating 1
- HL, Hearing loss
- KCNQ3, Potassium Voltage-Gated Channel Subfamily Q Member 3
- Missense mutation
- NGS, next generation sequencing
- NSHL, Non-syndromic hearing loss
- Non-syndromic hearing loss
- PROVEAN, Protein Variation Effect Analyzer
- PolyPhen-2, Polymorphism Phenotyping v2
- RFLP, restriction fragment length polymorphism
- ROH, runs of homozygosity
- RT-PCR, reverse transcription PCR
- RT-qPCR, quantitative reverse transcription PCR
- SAM, Sequence Alignment/Map
- SIFT, Sorting Intolerant From Tolerant
- SJL, Swiss Jim Lambert
- SPATA13, Spermatogenesis Associated 13
- ST3GAL1, ST3 Beta-Galactoside Alpha-2,3-Sialyltransferase 1
- TMEM59, Transmembrane Protein 59
- UAE, United Arab Emirates
- VariMAT, Variation and Mutation Annotation Toolkit
- WES, Whole exome sequencing
- Whole exome sequencing
- dpSNP, Single Nucleotide Polymorphism Database
- gEAR, gene Expression Analysis Resource
- gnomAD, genome aggregation database
- qPCR, quantitative PCR
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Affiliation(s)
- Mona Mahfood
- Department of Applied Biology, College of Sciences, University of Sharjah, Sharjah, United Arab Emirates
| | - Jihen Chouchen
- Human Genetics and Stem Cell Research Group, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah, United Arab Emirates
| | - Walaa Kamal Eddine Ahmad Mohamed
- Human Genetics and Stem Cell Research Group, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah, United Arab Emirates
| | - Abdullah Al Mutery
- Department of Applied Biology, College of Sciences, University of Sharjah, Sharjah, United Arab Emirates.,Human Genetics and Stem Cell Research Group, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah, United Arab Emirates
| | - Rania Harati
- Department of Pharmacy Practice and Pharmacotherapeutics, College of Pharmacy, University of Sharjah, Sharjah, United Arab Emirates
| | - Abdelaziz Tlili
- Department of Applied Biology, College of Sciences, University of Sharjah, Sharjah, United Arab Emirates.,Human Genetics and Stem Cell Research Group, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah, United Arab Emirates
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Fugaru I, Goudie C, Capolicchio JP. Von Hippel-Lindau disease and rapidly progressing pheochromocytomas in siblings. Fam Cancer 2021; 21:229-233. [PMID: 33877494 DOI: 10.1007/s10689-021-00252-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 04/05/2021] [Indexed: 10/21/2022]
Abstract
Von Hippel-Lindau (VHL) disease is an autosomal dominant inherited condition with a predisposition to the development of a variety of tumors including pheochromocytomas. A number of cancer surveillance protocols for patients with VHL have been developed, all of which are based on expert opinion. We report a case of two brothers with a strong family history of VHL type 2 due to a pathogenic germline VHL variant, specifically, a surface missense substitution, with a rapidly progressive clinical course that both presented with a large adrenal mass. Both brothers presented with large pheochromocytomas, the earliest presentation being at age 7, despite routine screening. The rapid progression and early presentation of these patients raises an important discussion around the commonly used surveillance protocols for pheochromocytoma in pediatric patients with VHL and missense mutations. We conclude that a more accelerated surveillance protocol may be adequate for VHL families with a high pheochromocytoma risk.
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Affiliation(s)
- Ioana Fugaru
- Division of Urology, Department of Surgery, McGill University Health Centre, Montreal, QC, Canada
| | - Catherine Goudie
- Division of Hematology-Oncology, Department of Pediatrics, Montreal Children's Hospital, McGill University Health Centre, Montreal, QC, Canada
| | - John-Paul Capolicchio
- Division of Urology, Department of Surgery, McGill University Health Centre, Montreal, QC, Canada. .,Division of Pediatric Urology, Department of Pediatric Surgery, Montreal Children's Hospital, McGill University Health Centre, 1001 Decarie blvd., Suite B4.2916, Montreal, QC, H4A 3J1, Canada.
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