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Sun J, Hua L, He Y, Liu H, Liu Q, Chen M, Li J, Ye J, Fang D, Ji R, Chen Y, Yang C, Zhang J. Genetic analysis and functional study of novel CFTR variants in Chinese children with cystic fibrosis. Gene 2024; 907:148190. [PMID: 38246579 DOI: 10.1016/j.gene.2024.148190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/27/2023] [Accepted: 01/17/2024] [Indexed: 01/23/2024]
Abstract
OBJECTIVES To describe the clinical characteristics of Chinese cystic fibrosis (CF) patients and to investigate the variants of CFTR and their potential pathogenicity. STUDY DESIGN Chinese patients with potential CF diagnosis were studied. Clinical data were reviewed retrospectively from medical records. Whole exome sequencing and genetic evaluation were conducted to explore potential gene variants. The disruption of the variants to protein structure and function was explored and validated using in vitro experiments and in silico analysis. RESULTS Four patients were recruited to the study, three of them were diagnosed as CF, and one was diagnosed as CFTR-related disorder. The age at symptom onset for the patients in this study ranged from newborn to 6 years, while the age at diagnosis varied from 3 to 11 years. All four patients exhibited bilateral diffuse bronchiectasis with Pseudomonas aeruginosa infections, and three of them had malnutrition. Finger clubbing was observed in three patients, two of whom displayed mixed ventilatory dysfunction. The CFTR variants spectrum of Chinese children with CF differs from that of Caucasian. A total of six variants were identified, two of which were first reported (c.1219G > T [p.Glu407*] and c.1367delT [p.Ala457Leufs*12]). The nonsense variants c.1219G > T, c.1657C > T and c.2551C > T and the frameshift variant c.1367delT were predicted to introduce premature stop codon and produce shorten CFTR protein, which was also first validated by in vitro truncation assay in this study. The missense variant c.1810A > C was predicted to disrupt the function of the nucleotide-binding domain 1 (NBD1) in the CFTR protein. The splicing variant c.1766 + 5G > T caused skipping of exon 13 and damaged the integrity of CFTR protein. CONCLUSIONS Our study expands the spectrum of phenotypes and genotypes for CF of Chinese origin, which differs significantly from that of Caucasian. Genetic analysis and counseling are crucial and deserve extensive popularization for the diagnosis ofCF in patients of Chinese origin.
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Affiliation(s)
- Jingyi Sun
- Department of Pediatric Pulmonology, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Li Hua
- Department of Pediatric Pulmonology, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yafang He
- Department of Pediatric Pulmonology, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Haipei Liu
- Department of Pediatric Pulmonology, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Quanhua Liu
- Department of Pediatric Pulmonology, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Mengxue Chen
- Department of Pediatric Pulmonology, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jing Li
- Department of Pediatric Pulmonology, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jianmin Ye
- Department of Pediatric Pulmonology, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Dingzhu Fang
- Department of Pediatric Pulmonology, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ruoxu Ji
- Department of Pediatric Pulmonology, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yi Chen
- Department of Pediatric Pulmonology, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chao Yang
- Department of Urology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China; State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, China.
| | - Jianhua Zhang
- Department of Pediatric Pulmonology, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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Wang M, Zhou J, Long R, Mao R, Gao L, Wang X, Chen Y, Jin L, Zhu L. An overview of CFTR mutation profiles and assisted reproductive technology outcomes in Chinese patients with congenital obstructive azoospermia. J Assist Reprod Genet 2024; 41:505-513. [PMID: 38114870 PMCID: PMC10894795 DOI: 10.1007/s10815-023-03004-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 12/04/2023] [Indexed: 12/21/2023] Open
Abstract
PURPOSE The cystic fibrosis transmembrane conductance regulator (CFTR) is the most common causative gene attributed to congenital obstructive azoospermia (OA). The aim of this study was to conduct an epidemiological survey of congenital OA patients, to screen for CFTR mutations, and to follow their pregnancy outcomes in assisted reproductive technology (ART). METHODS This cohort study enrolled congenital OA patients undergoing ART and whole-exome sequencing from January 2018 to September 2023. Semen parameters, sex hormones, and seminal plasma biochemistry were evaluated. CFTR mutations identified in OA patients were analyzed. In addition, the laboratory outcomes, clinical outcomes, and neonatal outcomes were compared between OA patients carrying two CFTR mutations and the others after surgical sperm extraction-intracytoplasmic sperm injection (ICSI) treatment. RESULTS A total of 76 patients with congenital OA were enrolled. CFTR mutations were identified in 35 (46.1%) congenital OA patients. A total of 60 CFTR mutation sites of 27 types were identified, and 10 of them were novel. The average frequency was 1.71 (60/35) per person. The most common mutation was c.1210-11T > G (25%, 15/60). After ICSI treatment, there were no statistically significant differences in laboratory outcomes, clinical outcomes, and neonatal outcomes between OA patients carrying two CFTR mutations (n = 25) and other OA patients (n = 51). CONCLUSION Apart from the IVS9-5T mutation, the genetic mutation pattern of CFTR in Chinese OA patients is heterogeneous, which is significantly different from that of Caucasians. Although carrying two CFTR mutations or not had no effect on the pregnancy outcomes in OA patients after ICSI, genetic counseling is still recommended for such patients.
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Affiliation(s)
- Meng Wang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Juepu Zhou
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Rui Long
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ruolin Mao
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Limin Gao
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiangfei Wang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yinwei Chen
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Lei Jin
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
| | - Lixia Zhu
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
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Krasnova M, Efremova A, Mokrousova D, Bukharova T, Kashirskaya N, Kutsev S, Kondratyeva E, Goldshtein D. Advances in the Study of Common and Rare CFTR Complex Alleles Using Intestinal Organoids. J Pers Med 2024; 14:129. [PMID: 38392563 PMCID: PMC10890655 DOI: 10.3390/jpm14020129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/15/2024] [Accepted: 01/19/2024] [Indexed: 02/24/2024] Open
Abstract
Complex alleles (CAs) arise when two or more nucleotide variants are present on a single allele. CAs of the CFTR gene complicate the cystic fibrosis diagnosis process, classification of pathogenic variants, and determination of the clinical picture of the disease and increase the need for additional studies to determine their pathogenicity and modulatory effect in response to targeted therapy. For several different populations around the world, characteristic CAs of the CFTR gene have been discovered, although in general the prevalence and pathogenicity of CAs have not been sufficiently studied. This review presents examples of using intestinal organoid models for assessments of the two most common and two rare CFTR CAs in individuals with cystic fibrosis in Russia.
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Affiliation(s)
- Maria Krasnova
- Research Centre for Medical Genetics, Moscow 115522, Russia
| | - Anna Efremova
- Research Centre for Medical Genetics, Moscow 115522, Russia
| | | | | | - Nataliya Kashirskaya
- Research Centre for Medical Genetics, Moscow 115522, Russia
- Moscow Regional Research and Clinical Institute ("MONIKI"), Schepkina Street, 61/2, 1, Moscow 129110, Russia
| | - Sergey Kutsev
- Research Centre for Medical Genetics, Moscow 115522, Russia
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Chernykh V, Sorokina T, Sedova A, Shtaut M, Solovova O, Marnat E, Adyan T, Beskorovaynaya T, Stepanova A, Shchagina O, Polyakov A. L138ins Variant of the CFTR Gene in Russian Infertile Men. Genes (Basel) 2023; 14:1407. [PMID: 37510311 PMCID: PMC10379041 DOI: 10.3390/genes14071407] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 06/02/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023] Open
Abstract
(1) Introduction: Pathogenic variants in the CFTR (Cystic Fibrosis Transmembrane conductance Regulator, OMIM: 602421) gene cause Cystic Fibrosis (CF, OMIM: 219700) and CF-related disorders (CF-RD), often accompanied by obstructive azoospermia due to congenital bilateral aplasia of vas deferens (CBAVD, OMIM: 277180) in male patients. The L138ins (c.413_415dup; p. (Leu138dup)) is a mild variant in the CFTR gene that is relatively common among CF-patients in Slavic populations. The frequency of this variant in Russian infertile men has not been sufficiently studied; (2) Materials and Methods: The sample consisted of 6033 Russian infertile men. The patients were tested for 22 common in Russian populations pathogenic variants of the CFTR gene and the IVS9Tn-polymorphic locus of the intron 9. Molecular-genetic studies were performed using amplified fragment length polymorphism (AFLP-PCR), multiplex ligation-dependent probe amplification (MLPA), and nested PCR (for analysis of the IVS9Tn-polymorphic locus); (3) Results: Pathogenic variants in the CFTR were detected in 3.9% of patients. The most frequent variants were F508del and CFTRdele2.3(21kb), accounted for 61.0% and 7.1% of detected variants, respectively. The L138ins variant was detected in 17 (0.28%) individuals: one of them was homozygous, 10 patients were heterozygous, and 6 patients were compound-heterozygous (F508del/L138ins, n = 4; L138ins/N1303K, n = 1; L138ins/5T, n = 1). Two pathogenic CF-causing variants in the CFTR gene were detected in 8 patients, including 7 compound heterozygous (F508del/L138ins, n = 4; F508del/N1303K, n = 1; 2184insA/E92K, n = 1; 3849+10kbC>T/E92K, n = 1) and one homozygous (L138ins/L138ins). The L138ins variant was found in 7 out of 16 (43.75%) chromosomes in six of these patients. The most common pathogenic variant, F508del, was identified in five out of them, in 5 of 16 (31.25%) chromosomes. The allele frequency (AF) of the L138ins variant in the sample has been found to be 0.0014.; (4) Conclusions: The L138ins variant of the CFTR gene is the third most common variant after F508del and CFTRdele2.3(kb) among Russian infertile men.
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Affiliation(s)
- Vyacheslav Chernykh
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (T.S.); (A.S.); (M.S.); (O.S.); (T.A.); (T.B.); (A.S.); (O.S.); (A.P.)
- Pirogov Russian National Research Medical University of the Ministry of Healthcare of the Russian Federation, 117997 Moscow, Russia;
| | - Tatyana Sorokina
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (T.S.); (A.S.); (M.S.); (O.S.); (T.A.); (T.B.); (A.S.); (O.S.); (A.P.)
| | - Anna Sedova
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (T.S.); (A.S.); (M.S.); (O.S.); (T.A.); (T.B.); (A.S.); (O.S.); (A.P.)
| | - Maria Shtaut
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (T.S.); (A.S.); (M.S.); (O.S.); (T.A.); (T.B.); (A.S.); (O.S.); (A.P.)
| | - Olga Solovova
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (T.S.); (A.S.); (M.S.); (O.S.); (T.A.); (T.B.); (A.S.); (O.S.); (A.P.)
| | - Ekaterina Marnat
- Pirogov Russian National Research Medical University of the Ministry of Healthcare of the Russian Federation, 117997 Moscow, Russia;
| | - Tagui Adyan
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (T.S.); (A.S.); (M.S.); (O.S.); (T.A.); (T.B.); (A.S.); (O.S.); (A.P.)
| | - Tatyana Beskorovaynaya
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (T.S.); (A.S.); (M.S.); (O.S.); (T.A.); (T.B.); (A.S.); (O.S.); (A.P.)
| | - Anna Stepanova
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (T.S.); (A.S.); (M.S.); (O.S.); (T.A.); (T.B.); (A.S.); (O.S.); (A.P.)
| | - Olga Shchagina
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (T.S.); (A.S.); (M.S.); (O.S.); (T.A.); (T.B.); (A.S.); (O.S.); (A.P.)
| | - Aleksandr Polyakov
- Research Centre for Medical Genetics, 115522 Moscow, Russia; (T.S.); (A.S.); (M.S.); (O.S.); (T.A.); (T.B.); (A.S.); (O.S.); (A.P.)
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Feng J, Zhang Y, Yang X, Zhang Y. Heterogeneous spectrum of CFTR gene mutations in Chinese patients with CAVD and the dilemma of genetic blocking strategy. Reproduction 2022; 164:R47-R56. [PMID: 35913788 DOI: 10.1530/rep-21-0315] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Accepted: 06/17/2022] [Indexed: 01/18/2023]
Abstract
In brief The genetic heterogeneity of CFTR gene mutations in Chinese patients with congenital absence of the vas deferens (CAVD) differs from the hotspot mutation pattern in Caucasians. This paper reviews and suggests a more suitable screening strategy for the Chinese considering the dilemma of CFTR genetic blocking. Abstract Congenital absence of the vas deferens (CAVD) is a major cause of obstructive azoospermia and male infertility, with CFTR gene mutation as the main pathogenesis. Other genes such as ADGRG2, SLC9A3, and PANK2 have been discovered and proven to be associated with CAVD in recent studies. Multiple CFTR hotspot mutations have been found in Caucasians in several foreign countries, and relevant genetic counseling and preimplantation genetic diagnosis (PGD) have been conducted for decades. However, when we examined research on Chinese CAVD, we discovered that CFTR mutations show heterogeneity in the Chinese Han population, and there is currently no well-established screening strategy. Therefore, we have reviewed the literature, combining domestic and international research as well as our own, aiming to review research progress on the CFTR gene in China and discuss the appropriate scope for CFTR gene detection, the detection efficiency of other CAVD-related genes, and the screening strategy applicable to the Chinese Han population. This study provides more valuable information for genetic counseling and a theoretical basis for PGD and treatment for couples with CAVD when seeking reproductive assistance.
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Affiliation(s)
- Jiarong Feng
- 1Department of Infertility and Sexual Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Yanan Zhang
- 1Department of Infertility and Sexual Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Xiaojian Yang
- 1Department of Infertility and Sexual Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Yan Zhang
- 1Department of Infertility and Sexual Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
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Martinovich KM, Kicic A, Stick SM, Johnsen RD, Fletcher S, Wilton SD. Investigating the Implications of CFTR Exon Skipping Using a Cftr Exon 9 Deleted Mouse Model. Front Pharmacol 2022; 13:868863. [PMID: 35392567 PMCID: PMC8981082 DOI: 10.3389/fphar.2022.868863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 03/07/2022] [Indexed: 11/13/2022] Open
Abstract
Introduction: Severity and disease progression in people with Cystic Fibrosis (CF) is typically dependent on their genotype. One potential therapeutic strategy for people with specific mutations is exon skipping with antisense oligonucleotides (AO). CFTR exon 9 is an in-frame exon and hence the exclusion of this exon would excise only 31 amino acids but not alter the reading frame of the remaining mRNA. Splice mutations 1209 + 1 G > C and 1209 + 2 T > G were documented to cause CFTR exon 9 skipping and these variants were reported to manifest as a milder CF disease, therefore exon 9 skipping could be beneficial for people with class I mutations that affect exon 9 such as p.Trp401X. While the impact of exon 9 skipping on gene expression and cellular pathways can be studied in cells in vitro, trace amount of full-length normal or mutated material could confound the evaluation. To overcome this limitation, the impact of CFTR exon 9 skipping on disease phenotype and severity is more effectively evaluated in a small animal model. It was hypothesised that antisense oligonucleotide-mediated skipping this particular exon could result in a "mild mouse CF phenotype". Methods: Cftr exon 9 deleted mice were generated using homologous recombination. Survival of homozygous (Cftr Δ9/Δ9 ) and heterozygous (Cftr Δ9/+ ) mice was compared to that of other CF mouse models, and lung and intestinal organ histology examined for any pathologies. Primary airway epithelial cells (pAECs) were harvested from Cftr Δ9/Δ9 mice and cultured at the Air Liquid Interface for CFTR functional assessment using Ussing Chamber analysis. Results: A Cftr Δ9/Δ9 mouse model presented with intestinal obstructions, and at time of weaning (21 days). Cftr Δ9/Δ9 mice had a survival rate of 83% that dropped to 38% by day 50. Histological sections of the small intestine from Cftr Δ9/Δ9 mice showed more goblet cells and mucus accumulation than samples from the Cftr Δ9/+ littermates. Airway epithelial cell cultures established from Cftr Δ9/Δ9 mice were not responsive to forskolin stimulation. Summary: The effect of Cftr exon 9 deletion on Cftr function was assessed and it was determined that the encoded Cftr isoform did not result in a milder "mouse CF disease phenotype," suggesting that Cftr exon 9 is not dispensable, although further investigation in human CF pAECs would be required to confirm this observation.
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Affiliation(s)
- Kelly M Martinovich
- School of Medicine, The University of Western Australia, Perth, WA, Australia.,Telethon Kids Institute, Wal-yan Respiratory Research Centre, Perth, WA, Australia.,Centre for Molecular Medicine and Innovative Therapeutics, Health Futures Institute, Murdoch University, Murdoch, WA, Australia
| | - Anthony Kicic
- School of Medicine, The University of Western Australia, Perth, WA, Australia.,Telethon Kids Institute, Wal-yan Respiratory Research Centre, Perth, WA, Australia.,Centre for Cell Therapy and Regenerative Medicine, School of Medicine and Pharmacology, The University of Western Australia, Perth, WA, Australia.,Department of Respiratory and Sleep Medicine, Perth Childrens Hospital, Nedlands, WA, Australia.,School of Population Health, Curtin University, Bentley, WA, Australia
| | - Stephen M Stick
- School of Medicine, The University of Western Australia, Perth, WA, Australia.,Telethon Kids Institute, Wal-yan Respiratory Research Centre, Perth, WA, Australia.,Centre for Cell Therapy and Regenerative Medicine, School of Medicine and Pharmacology, The University of Western Australia, Perth, WA, Australia.,Department of Respiratory and Sleep Medicine, Perth Childrens Hospital, Nedlands, WA, Australia
| | - Russell D Johnsen
- Centre for Molecular Medicine and Innovative Therapeutics, Health Futures Institute, Murdoch University, Murdoch, WA, Australia.,Perron Institute for Neurological and Translational Sciences, Centre for Neuromuscular and Neurological Disorders, The University of Western Australia, Nedlands, WA, Australia
| | - Sue Fletcher
- Centre for Molecular Medicine and Innovative Therapeutics, Health Futures Institute, Murdoch University, Murdoch, WA, Australia.,Perron Institute for Neurological and Translational Sciences, Centre for Neuromuscular and Neurological Disorders, The University of Western Australia, Nedlands, WA, Australia.,PYC Therapeutics, Perth, WA, Australia
| | - Steve D Wilton
- Centre for Molecular Medicine and Innovative Therapeutics, Health Futures Institute, Murdoch University, Murdoch, WA, Australia.,Perron Institute for Neurological and Translational Sciences, Centre for Neuromuscular and Neurological Disorders, The University of Western Australia, Nedlands, WA, Australia
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Cheng H, Yang S, Meng Q, Zheng B, Gu Y, Wang L, Song T, Xu C, Wang G, Han M, Shen L, Ding J, Li H, Ouyang J. Genetic analysis and intracytoplasmic sperm injection outcomes of Chinese patients with congenital bilateral absence of vas deferens. J Assist Reprod Genet 2022; 39:719-728. [PMID: 35119551 PMCID: PMC8995229 DOI: 10.1007/s10815-022-02417-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 01/27/2022] [Indexed: 11/24/2022] Open
Abstract
PURPOSE Congenital bilateral absence of the vas deferens (CBAVD) is a major cause of obstructive azoospermia and male factor infertility. CBAVD is mainly caused by mutations in the genes encoding CFTR (cystic fibrosis transmembrane conductance regulator) and ADGRG2 (adhesion G protein-coupled receptor G2). This study aimed to describe CFTR and ADGRG2 variations in 46 Chinese CBAVD patients and evaluated sperm retrieval and assisted reproductive technology outcomes. METHODS The CFTR and ADGRG2 genes were sequenced and analyzed by whole-exome sequencing (WES), and variations were identified by Sanger sequencing. Bioinformatic analysis was performed. We retrospectively reviewed the outcomes of patients undergoing sperm retrieval surgery and intracytoplasmic sperm injection (ICSI). RESULTS In total, 35 of 46 (76.09%) patients carried at least one variation in CFTR, but no copy number variants or ADGRG2 variations were found. In addition to the IVS9-5 T allele, there were 27 CFTR variations, of which 4 variations were novel and predicted to be damaging by bioinformatics. Spermatozoa were successfully retrachieved in 46 patients, and 39 of the patients had their own offspring through ICSI. CONCLUSION There are no obvious hotspot CFTR mutations in Chinese CBAVD patients besides the IVS9-5 T allele. Therefore, WES might be the best detection method, and genetic counseling should be different from that provided to Caucasian populations. After proper counseling, all patients can undergo sperm retrieval from their epididymis or testis, and most of them can have their own children through ICSI.
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Affiliation(s)
- Hongbo Cheng
- Department of Urology, The First Affiliated Hospital of Soochow University, Suzhou, 215000 Jiangsu China ,Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Shenmin Yang
- Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Qingxia Meng
- Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Bo Zheng
- Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Yidong Gu
- Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Luyun Wang
- Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Tao Song
- Department of Andrology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu China
| | - Chunlu Xu
- Department of Andrology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu China
| | - Gaigai Wang
- Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Mutian Han
- Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Liyan Shen
- Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Jie Ding
- Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Hong Li
- Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China.
| | - Jun Ouyang
- Department of Urology, The First Affiliated Hospital of Soochow University, Suzhou, 215000, Jiangsu, China.
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Alibakhshi R, Mohammadi A, Khamooshian S, Kazeminia M, Moradi K. CFTR gene mutation spectrum among 735 Iranian patients with cystic fibrosis: A comprehensive systematic review. Pediatr Pulmonol 2021; 56:3644-3656. [PMID: 34525262 DOI: 10.1002/ppul.25647] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 08/06/2021] [Accepted: 08/25/2021] [Indexed: 01/17/2023]
Abstract
In this study, the spectrum and frequency of cystic fibrosis transmembrane conductance regulator (CFTR) gene mutations previously reported among Iranian cystic fibrosis (CF) patients have been reviewed and discussed. Using the keywords of Cystic Fibrosis, CF, CFTR, and Iran, along with their Persian equivalents, a comprehensive search was performed on the online databases. After applying the inclusion and exclusion criteria, 16 articles with an overall sample of 735 Iranian patients with CF, were included in this systematic review. A total of 101 different CFTR gene variants had been reported. The mutation of p.Phe508del (c.1521_1523delCTT) (21.22%) was the most frequent one among Iranian patients with CF. In conclusion, due to the fact that in many provinces of Iran no specific study has been done so far, it seems that the CFTR gene mutation spectrum in patients with CF from Iran is much wider.
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Affiliation(s)
- Reza Alibakhshi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Aboozar Mohammadi
- Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Sahand Khamooshian
- Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mohsen Kazeminia
- Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Keivan Moradi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Tan MQ, Huang WJ, Lan FH, Xu YJ, Zheng MY, Tang Y. Genetic mutation analysis of 22 patients with congenital absence of vas deferens: A single-center study†. Biol Reprod 2021; 106:108-117. [PMID: 34673937 DOI: 10.1093/biolre/ioab194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 09/24/2021] [Accepted: 10/15/2021] [Indexed: 11/13/2022] Open
Abstract
Congenital absence of the vas deferens (CAVD), a congenital malformation of the male reproductive system, causes obstructive azoospermia and male infertility. Currently, the cystic fibrosis transmembrane conductance regulator (CFTR) has been recognized as the main pathogenic gene in CAVD, with some other genes, such as adhesion G-protein coupled receptor G2 (ADGRG2), solute carrier family 9 isoform 3 (SLC9A3), sodium channel epithelial 1 subunit beta (SCNN1B), and carbonic anhydrase 12 (CA12) being candidate genes in the pathogenesis of CAVD. However, the frequency and spectrum of these mutations, as well as the pathogenic mechanisms of CAVD, have not been fully investigated. Here, we sequenced all genes with potentially pathogenic mutations using next-generation sequencing and verified all identified variants by Sanger sequencing. Further bioinformatic analysis was performed to predict the pathogenicity of mutations. We described the distribution of the p.V470M, poly-T, and TG-repeat CFTR polymorphisms, and identified novel missense mutations in the CFTR and SLC9A3 genes, respectively. Taken together, we identified mutations in the CFTR, ADGRG2, SLC9A3, SCNN1B, and CA12 genes in 22 patients with CAVD, thus broadening the genetic spectrum of Chinese patients with CAVD.
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Affiliation(s)
- Mao-Qing Tan
- Department of Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, Fujian, 350001, P.R. China.,Department of Clinical Laboratory, Dongfang Hospital Affiliated to Xiamen University, Fuzhou, Fujian, 350025, P.R. China
| | - Wu-Jian Huang
- Center for Reproductive Medicine, 900TH Hospital of Joint Logistic Support Force, Fuzhou, Fujian, 350025, P.R. China
| | - Feng-Hua Lan
- Laboratory of Basic Medicine, 900TH Hospital of Joint Logistics Support Force, Fuzhou, Fujian, 350025, P.R. China
| | - Yong-Jun Xu
- Laboratory of Basic Medicine, 900TH Hospital of Joint Logistics Support Force, Fuzhou, Fujian, 350025, P.R. China
| | - Mei-Yu Zheng
- Laboratory of Basic Medicine, 900TH Hospital of Joint Logistics Support Force, Fuzhou, Fujian, 350025, P.R. China
| | - Ying Tang
- Laboratory of Basic Medicine, 900TH Hospital of Joint Logistics Support Force, Fuzhou, Fujian, 350025, P.R. China
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Gaikwad A, Khan S, Kadam S, Shah R, Kulkarni V, Kumaraswamy R, Kadam K, Dighe V, Gajbhiye R. Cystic fibrosis transmembrane conductance regulator-related male infertility: Relevance of genetic testing & counselling in Indian population. Indian J Med Res 2021; 152:575-583. [PMID: 34145097 PMCID: PMC8224163 DOI: 10.4103/ijmr.ijmr_906_18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Background & objectives: Due to limited information available on the frequency and spectrum of cystic fibrosis (CF) transmembrane conductance regulator (CFTR) gene mutations in congenital bilateral absence of vas deferens (CBAVD) in Indian population, it is difficult to provide accurate genetic counselling to couples. The present study was undertaken to investigate the spectrum and frequency of CFTR gene mutations in Indian men with CBAVD and to determine the female CF carrier status. Methods: Direct DNA sequencing of the CFTR gene was carried out in eighty CBAVD men, their female partners and fifty controls from the general population. Pathological significance of the identified novel CFTR gene variants was carried out using in silico tools. Appropriate genetic counselling was provided to the couples prior to intracytoplasmic sperm injection (ICSI). Results: A significant association was observed for CFTR gene variants in Indian CBAVD men versus controls (odds ratio: 12.1; 95% confidence interval: 4.8-30.4; P<0.0001). A total of 20 CFTR gene variants were identified in 53 CBAVD men. Eight novel missense CFTR gene variants (L214V, A238P, E379V, L578I, F587L, L926W, R1325K and R1453Q); two novel splice-site gene variants (c.1-30C>G and IVS1+2T>G) and ten previously reported mutations (R75Q, c.1210-12[5], F508del, A309G, R334W, I444T, R668C, R709X, A1285V and Q1352H) were detected in CBAVD men. The novel and reported CFTR gene mutations were L926W (2.5%, P=0.26), R1453Q (2.5%, P=0.26), F508del (8.75%, P=0.03) and c.1210-12[5] (42.5%, P=0.002). A total of 13 (16.2%) female partners were found to be a CF carrier. Nine couples had a risk of transmitting mutant CFTR allele to the offspring. Interpretation & conclusions: The heterogeneous spectrum of CFTR gene in Indian population suggests the necessity of screening CBAVD men and female partners for accurate genetic counselling prior to undergoing ICSI.
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Affiliation(s)
- Avinash Gaikwad
- Department of Clinical Research, National Institute for Research in Reproductive Health, Mumbai, Maharashtra, India; School of Biological Sciences, Monash University, Victoria, Australia
| | - Shagufta Khan
- Department of Clinical Research, National Institute for Research in Reproductive Health, Mumbai, Maharashtra, India
| | - Seema Kadam
- Department of Molecular Immunodiagnostics, National Institute for Research in Reproductive Health, Mumbai, Maharashtra, India
| | - Rupin Shah
- Department of Clinical Research; Lilavati Hospital & Research Center, National Institute for Research in Reproductive Health, Mumbai, Maharashtra, India
| | - Vijay Kulkarni
- Department of Clinical Research, National Institute for Research in Reproductive Health, Mumbai, Maharashtra, India
| | | | - Kaushiki Kadam
- Department of Gamete Immunobiology, National Institute for Research in Reproductive Health, Mumbai, Maharashtra, India
| | - Vikas Dighe
- National Center for Preclinical Reproductive & Genetic Toxicology, National Institute for Research in Reproductive Health, Mumbai, Maharashtra, India
| | - Rahul Gajbhiye
- Department of Clinical Research, National Institute for Research in Reproductive Health, Mumbai, Maharashtra, India
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Al Balushi S, Al Balushi Y, Al Busaidi M, Al Mutawa L. A Novel Cystic Fibrosis Gene Mutation C.4242+1G>C in an Omani Patient: A Case Report. Oman Med J 2021; 36:e243. [PMID: 33854794 PMCID: PMC8019455 DOI: 10.5001/omj.2021.28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 03/09/2020] [Indexed: 11/26/2022] Open
Abstract
Cystic fibrosis (CF) is a genetic disease caused by a mutation in the cystic fibrosis transmembrane conductance regulator (CFTR) gene that affects multisystems in the body, particularly the lungs and digestive system. We report a case of an Omani newborn who presented with meconium ileus and high suspicion of CF. Thus, full CFTR gene sequencing was performed, which revealed a homozygous unreported C.4242+1G>C novel gene mutation. Both parents were found to be heterozygous for this mutation. This case sheds light on the importance of the extensive genetic testing of typical CF cases in the absence of family history or during neonatal presentations, especially when the sweat test cannot be performed and the diagnosis can be challenging.
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12
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Fedder J, Jørgensen MW, Engvad B. Prevalence of CBAVD in azoospermic men carrying pathogenic CFTR mutations - Evaluated in a cohort of 639 non-vasectomized azoospermic men. Andrology 2020; 9:588-598. [PMID: 33095972 PMCID: PMC7894542 DOI: 10.1111/andr.12925] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 09/25/2020] [Accepted: 10/20/2020] [Indexed: 12/28/2022]
Abstract
BACKGROUND Men with obstructive azoospermia (OA) due to impaired development of the genital tract often carry at least one Cystic Fibrosis Transmembrane Conductance Regulator CFTR mutation. OBJECTIVE To determine the frequency of Congenital Bilateral Absence of Vas deferens (CBAVD) in men with azoospermia carrying CFTR gene mutations. MATERIALS AND METHODS Non-vasectomized men with azoospermia referred to our andrological center were consecutively included. All men underwent palpation of the scrotal parts of the Vasa deferentia, ultrasonography of the testicles and hormone profile, and genetic analyses. Testicular biopsy was usually performed. A panel of 32 of the most important CFTR mutations was examined from genomic DNA isolated from blood lymphocytes. Either multiplex PCR analysis or a next-generation sequencing technique was performed. RESULTS Among the 639 men with azoospermia, 69 (10.8%) had at least one CFTR mutation. Of the 43 patients with at least one of the two CFTR mutations, ΔF508 and R117H, 19 (44.2%) showed CBAVD, 2 (4.7%) Congenital Unilateral Absence of Vas deferens (CUAVD), and 22 (51.2%) presence of the scrotal parts of the Vasa deferentia. In contrast, only 1/21 men (4.8%) with an isolated IVS8-5T variant showed CBAVD. Among the further 20 men with an isolated IVS8-5T variant, 11 had a history of cryptorchidism. Among the 570 men without CFTR mutations, CBAVD was found in only two men and CUAVD in one. FSH level was higher and testicular volume lower in men with present Vasa deferentia compared to those without (P < .001; Student's t test). Thirty-one men with either ΔF508 or R117H mutations, or both, had a testicular biopsy. Motile spermatozoa were found in 100% of 16 cases with CBAVD but in only 6 out of 15 cases with present Vasa deferentia (P < .01; Fisher's exact test). DISCUSSION AND CONCLUSIONS CBAVD was found in ~ 44% of men with ΔF508/R117H mutations. The data may support that CFTR mutations might affect male fertility through other mechanisms than obstruction of the genital tract. For a practical, clinical purpose analysis for only ΔF508, R117H and IVS8-5T seems sufficient until further research shows anything else.
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Affiliation(s)
- Jens Fedder
- Centre of Andrology & Fertility Clinic, Odense University Hospital, Odense, Denmark.,Institute of Clinical Medicine, University of Southern Denmark, Odense, Denmark
| | - Mette W Jørgensen
- Department of Clinical Genetics, Lillebaelt Hospital, Vejle, Denmark
| | - Birte Engvad
- Department of Pathology, Odense University Hospital, Odense, Denmark
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13
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Jiao SY, Yang YH, Chen SR. Molecular genetics of infertility: loss-of-function mutations in humans and corresponding knockout/mutated mice. Hum Reprod Update 2020; 27:154-189. [PMID: 33118031 DOI: 10.1093/humupd/dmaa034] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 07/15/2020] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Infertility is a major issue in human reproductive health, affecting an estimated 15% of couples worldwide. Infertility can result from disorders of sex development (DSD) or from reproductive endocrine disorders (REDs) with onset in infancy, early childhood or adolescence. Male infertility, accounting for roughly half of all infertility cases, generally manifests as decreased sperm count (azoospermia or oligozoospermia), attenuated sperm motility (asthenozoospermia) or a higher proportion of morphologically abnormal sperm (teratozoospermia). Female infertility can be divided into several classical types, including, but not limited to, oocyte maturation arrest, premature ovarian insufficiency (POI), fertilization failure and early embryonic arrest. An estimated one half of infertility cases have a genetic component; however, most genetic causes of human infertility are currently uncharacterized. The advent of high-throughput sequencing technologies has greatly facilitated the identification of infertility-associated gene mutations in patients over the past 20 years. OBJECTIVE AND RATIONALE This review aims to conduct a narrative review of the genetic causes of human infertility. Loss-of-function mutation discoveries related to human infertility are summarized and further illustrated in tables. Corresponding knockout/mutated animal models of causative genes for infertility are also introduced. SEARCH METHODS A search of the PubMed database was performed to identify relevant studies published in English. The term 'mutation' was combined with a range of search terms related to the core focus of the review: infertility, DSD, REDs, azoospermia or oligozoospermia, asthenozoospermia, multiple morphological abnormalities of the sperm flagella (MMAF), primary ciliary dyskinesia (PCD), acephalic spermatozoa syndrome (ASS), globozoospermia, teratozoospermia, acrosome, oocyte maturation arrest, POI, zona pellucida, fertilization defects and early embryonic arrest. OUTCOMES Our search generated ∼2000 records. Overall, 350 articles were included in the final review. For genetic investigation of human infertility, the traditional candidate gene approach is proceeding slowly, whereas high-throughput sequencing technologies in larger cohorts of individuals is identifying an increasing number of causative genes linked to human infertility. This review provides a wide panel of gene mutations in several typical forms of human infertility, including DSD, REDs, male infertility (oligozoospermia, MMAF, PCD, ASS and globozoospermia) and female infertility (oocyte maturation arrest, POI, fertilization failure and early embryonic arrest). The causative genes, their identified mutations, mutation rate, studied population and their corresponding knockout/mutated mice of non-obstructive azoospermia, MMAF, ASS, globozoospermia, oocyte maturation arrest, POI, fertilization failure and early embryonic arrest are further illustrated by tables. In this review, we suggest that (i) our current knowledge of infertility is largely obtained from knockout mouse models; (ii) larger cohorts of clinical cases with distinct clinical characteristics need to be recruited in future studies; (iii) the whole picture of genetic causes of human infertility relies on both the identification of more mutations for distinct types of infertility and the integration of known mutation information; (iv) knockout/mutated animal models are needed to show whether the phenotypes of genetically altered animals are consistent with findings in human infertile patients carrying a deleterious mutation of the homologous gene; and (v) the molecular mechanisms underlying human infertility caused by pathogenic mutations are largely unclear in most current studies. WILDER IMPLICATIONS It is important to use our current understanding to identify avenues and priorities for future research in the field of genetic causes of infertility as well as to apply mutation knowledge to risk prediction, genetic diagnosis and potential treatment for human infertility.
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Affiliation(s)
- Shi-Ya Jiao
- Education Key Laboratory of Cell Proliferation & Regulation Biology, College of Life Sciences, Beijing Normal University, 100875 Beijing, China
| | - Yi-Hong Yang
- Reproduction Medical Center of West China Second University Hospital, Key Laboratory of Obstetric, Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, Sichuan University, 610041 Chengdu, China
| | - Su-Ren Chen
- Education Key Laboratory of Cell Proliferation & Regulation Biology, College of Life Sciences, Beijing Normal University, 100875 Beijing, China
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14
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Wu H, Gao Y, Ma C, Shen Q, Wang J, Lv M, Liu C, Cheng H, Zhu F, Tian S, Elshewy N, Ni X, Tan Q, Xu X, Zhou P, Wei Z, Zhang F, He X, Cao Y. A novel hemizygous loss-of-function mutation in ADGRG2 causes male infertility with congenital bilateral absence of the vas deferens. J Assist Reprod Genet 2020; 37:1421-1429. [PMID: 32314195 PMCID: PMC7311603 DOI: 10.1007/s10815-020-01779-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 04/08/2020] [Indexed: 11/26/2022] Open
Abstract
PURPOSE Cystic fibrosis transmembrane conductance regulator (CFTR) and adhesion G protein-coupled receptor G2 (ADGRG2) have been identified as the main pathogenic genes in congenital bilateral absence of the vas deferens (CBAVD), which is an important cause of obstructive azoospermia. This study aimed to identify the disease-causing gene in two brothers with CBAVD from a Chinese consanguineous family and reveal the intracytoplasmic sperm injection (ICSI) outcomes in these patients. METHODS Whole-exome sequencing and Sanger sequencing were used to identify the candidate pathogenic genes. Real-time polymerase chain reaction, immunohistochemistry, and immunofluorescence were used to assess the expression of the mutant gene. Moreover, the ICSI results from both patients were retrospectively reviewed. RESULTS A novel hemizygous loss-of-function mutation (c.G118T: p.Glu40*) in ADGRG2 was identified in both patients with CBAVD. This mutation is absent from the human genome databases and causes an early translational termination in the third exon of ADGRG2. Expression analyses showed that both the ADGRG2 mRNA and the corresponding protein were undetectable in the proximal epididymal tissue of ADGRG2-mutated patients. ADGRG2 expression was restricted to the apical membranes of non-ciliated epithelia in human efferent ducts, which was consistent with a previous report in mice. Both ADGRG2-mutated patients had normal spermatogenesis and had successful clinical outcomes following ICSI. CONCLUSIONS Our study verifies the pathogenic role of ADGRG2 in X-linked CBAVD and broadens the spectrum of ADGRG2 mutations. In addition, we found positive ICSI outcomes in the two ADGRG2-mutated CBAVD patients.
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Affiliation(s)
- Huan Wu
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), No 81 Meishan Road, Hefei, 230032, China
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, China
| | - Yang Gao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), No 81 Meishan Road, Hefei, 230032, China
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, China
| | - Cong Ma
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), No 81 Meishan Road, Hefei, 230032, China
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, China
| | - Qunshan Shen
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China
| | - Jiajia Wang
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China
| | - Mingrong Lv
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, No 81 Meishan Road, Hefei, 230032, China
- Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China
| | - Chunyu Liu
- Obstetrics and Gynecology Hospital, School of Life Sciences, Fudan University, Shanghai, 200011, China
| | - Huiru Cheng
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), No 81 Meishan Road, Hefei, 230032, China
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, No 81 Meishan Road, Hefei, 230032, China
| | - Fuxi Zhu
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, No 81 Meishan Road, Hefei, 230032, China
- Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China
| | - Shixiong Tian
- Obstetrics and Gynecology Hospital, School of Life Sciences, Fudan University, Shanghai, 200011, China
| | - Nagwa Elshewy
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China
| | - Xiaoqing Ni
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China
| | - Qing Tan
- Anhui Provincial Human Sperm Bank, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - Xiaofeng Xu
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, No 81 Meishan Road, Hefei, 230032, China
- Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China
| | - Ping Zhou
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, No 81 Meishan Road, Hefei, 230032, China
- Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China
| | - Zhaolian Wei
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, No 81 Meishan Road, Hefei, 230032, China
- Biopreservation and Artificial Organs, Anhui Provincial Engineering Research Center, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, China
| | - Feng Zhang
- Obstetrics and Gynecology Hospital, School of Life Sciences, Fudan University, Shanghai, 200011, China
| | - Xiaojin He
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China.
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), No 81 Meishan Road, Hefei, 230032, China.
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, China.
| | - Yunxia Cao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, China.
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), No 81 Meishan Road, Hefei, 230032, China.
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, China.
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15
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Marnat EG, Adyan TA, Stepanova AA, Beskorovainaya TS, Polyakov AV, Chernykh VB. CFTR Gene Variants and Genotypes in Russian Patients with CBAVD Syndrome. RUSS J GENET+ 2020. [DOI: 10.1134/s1022795420040055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Wang H, An M, Liu Y, Hu K, Jin Y, Xu S, Chen B, Lu M. Genetic diagnosis and sperm retrieval outcomes for Chinese patients with congenital bilateral absence of vas deferens. Andrology 2020; 8:1064-1069. [PMID: 32020786 DOI: 10.1111/andr.12769] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 01/21/2020] [Accepted: 02/03/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND Congenital bilateral absence of the vas deferens (CBAVD) is a frequent cause of obstructive azoospermia. CBAVD is mainly caused by mutations in the CFTR (cystic fibrosis transmembrane conductance regulator) gene and is also related to the X-linked ADGRG2 (adhesion G protein-coupled receptor G2) gene. Genetic screening and counseling strategies for Chinese CBAVD populations remain controversial because the genetic background of CBAVD in Chinese population is largely unknown. OBJECTIVES In this study, we aimed to study the mutation spectrum of CFTR and ADGRG2 in a group of CBAVD patients and to evaluate sperm retrieval outcomes in a subset of CBAVD patients. MATERIALS AND METHODS Next-generation targeted sequencing was used to identify mutations in the CFTR and ADGRG2 genes in 38 CBAVD patients. In addition, we followed and analyzed nine of the 38 patients who were undergoing sperm retrieval surgery. RESULTS In total, 27 of 38 (71.05%) patients carried at least one likely pathogenic or pathogenic mutation in CFTR or ADGRG2. In addition to the IVS9-5T allele, 15 CFTR and 1 ADGRG2 mutations were identified, including 4 novel mutations. CFTR hot-spot mutations were not identified in our study. Spermatozoon was successfully obtained in all nine patients who underwent MESA or TESE surgery, but most patients had spermatozoa with relatively low motility and high abnormality rates. DISCUSSION AND CONCLUSION Except for the IVS9-5T allele, hot-spot mutations of CFTR may not exist in Chinese CBAVD patients. Therefore, next-generation targeted sequencing for whole CFTR and ADGRG2 gene may be the appropriate genetic testing method, and genetic counseling may be different from Caucasian populations. We observed a high success rate of sperm retrieval with relatively low motility and high abnormality rates in Chinese CBAVD patients. However, this is only a weak conclusion due to the small sample size.
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Affiliation(s)
- Hongxiang Wang
- Department of Urology and Andrology, School of Medicine, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Miao An
- CarrierGene Biotechnologies Co., Ltd, Shanghai, China
| | - Yidong Liu
- Department of Urology and Andrology, School of Medicine, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Kai Hu
- Department of Urology and Andrology, School of Medicine, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yan Jin
- Department of Urology and Andrology, School of Medicine, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Shiran Xu
- Department of Urology and Andrology, School of Medicine, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Bin Chen
- Department of Urology and Andrology, School of Medicine, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Mujun Lu
- Department of Urology and Andrology, School of Medicine, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China
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17
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Feng J, Wu X, Zhang Y, Yang X, Ma G, Chen S, Luo S, Zhang Y. A novel mutation (-195C>A) in the promoter region of CFTR gene is associated with Chinese Congenital Bilateral Absence of Vas Deferens (CBAVD). Gene 2019; 719:144007. [PMID: 31357024 DOI: 10.1016/j.gene.2019.144007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 07/23/2019] [Accepted: 07/24/2019] [Indexed: 10/26/2022]
Abstract
Congenital bilateral absence of vas deferens (CBAVD), a frequent cause of obstructive azoospermia and male infertility in Chinese, is mainly due to mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene. This study aim to explore the promoter region of CFTR gene in CBAVD patients and study the mutations by functional analysis, and to discuss the significance of mutation testing in this area. We performed screening analysis on 65 CBAVD patients and 50 controls to detect mutations in the CFTR gene, and studied the functions of promoter mutations using reporter gene constructs, transient transfection techniques and subsequent assessment of transcriptional activity and expression levels. Mutations c.-195C>A and c.-34C>T in the promoter region of the CFTR gene were detected in 4 of our Chinese CBAVD patients, one of which was novel (c.-195C>A) and located in the conservative area, as well as the binding site of SP1 transcription factor through the prediction of bioinformatics analysis. By reverse transcription qPCR assay and luciferase assay, we validated it as a functional disease-causing variant that down-regulates the CFTR gene expression, and this effect was related to the amount of transcription factors. This study was the first to explore the promoter region of the CFTR gene in Chinese, and we believe that mutations in this region are associated with Chinese CBAVD patients. We also suggest a systematic strategy for genotyping Chinese CBAVD couples, which should help in developing reproductive counseling.
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Affiliation(s)
- Jiarong Feng
- Department of Infertility and Sexual Medicine, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Xiao Wu
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Yanan Zhang
- Department of Infertility and Sexual Medicine, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Xiaojian Yang
- Department of Infertility and Sexual Medicine, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Gongchao Ma
- Department of Infertility and Sexual Medicine, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Shitao Chen
- International Peace Maternity & Child Health Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Shaoge Luo
- Department of Infertility and Sexual Medicine, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Yan Zhang
- Department of Infertility and Sexual Medicine, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China.
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18
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Yuan P, Liang ZK, Liang H, Zheng LY, Li D, Li J, Zhang J, Tian J, Lai LH, Zhang K, He ZY, Zhang QX, Wang WJ. Expanding the phenotypic and genetic spectrum of Chinese patients with congenital absence of vas deferens bearing
CFTR
and
ADGRG
2
alleles. Andrology 2019; 7:329-340. [PMID: 30811104 DOI: 10.1111/andr.12592] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 12/06/2018] [Accepted: 01/08/2019] [Indexed: 12/12/2022]
Affiliation(s)
- P. Yuan
- IVF Center Department of Obstetrics and Gynecology Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou China
| | - Z. K. Liang
- IVF Center Department of Obstetrics and Gynecology Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou China
| | - H. Liang
- BNLMS State Key Laboratory for Structural Chemistry of Unstable and Stable Species Peking‐Tsinghua Center for Life Sciences at College of Chemistry and Molecular Engineering, and Center for Quantitative Biology Peking University Beijing China
| | - L. Y. Zheng
- IVF Center Department of Obstetrics and Gynecology Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou China
| | - D. Li
- IVF Center Department of Obstetrics and Gynecology Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou China
| | - J. Li
- IVF Center Department of Obstetrics and Gynecology Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou China
| | - J. Zhang
- Reproductive Medicine Center Sixth Affiliated Hospital Sun Yat‐sen University Guangzhou China
| | - J. Tian
- Ultrasonography Department Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou China
| | - L. H. Lai
- BNLMS State Key Laboratory for Structural Chemistry of Unstable and Stable Species Peking‐Tsinghua Center for Life Sciences at College of Chemistry and Molecular Engineering, and Center for Quantitative Biology Peking University Beijing China
| | - K. Zhang
- State Key Laboratory of Biocontrol School of Life Sciences Sun Yat‐sen University Guangzhou China
| | - Z. Y. He
- State Key Laboratory of Biocontrol School of Life Sciences Sun Yat‐sen University Guangzhou China
| | - Q. X. Zhang
- IVF Center Department of Obstetrics and Gynecology Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou China
| | - W. J. Wang
- IVF Center Department of Obstetrics and Gynecology Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou China
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19
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Yang B, Wang X, Zhang W, Li H, Wang B. Compound heterozygous mutations in CFTR causing CBAVD in Chinese pedigrees. Mol Genet Genomic Med 2018; 6:1097-1103. [PMID: 30450785 PMCID: PMC6305631 DOI: 10.1002/mgg3.486] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 09/05/2018] [Accepted: 09/17/2018] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Congenital bilateral absence of the vas deferens (CBAVD) is an important cause of obstructive azoospermia and male infertility. Mutations of CFTR caused the majority of CBAVD cases, and ADGRG2 was recently identified as a new pathogenic gene. Yet, most of the genetic evidence came from sporadic cases, and only one mutation in CFTR can be found in patients. METHODS In present study, we collected two CBAVD pedigrees, each having two affected male siblings. We performed whole exome sequencing on all patients and validated all potential variants by Sanger sequencing. RESULTS We excluded ADGRG2 variants but identified compound heterozygous variants of CFTR in both families (NM_000492.3:c.1210-33_1210-6GT[13]T[5] and c.4056G>C;p.Gln1352Cys in pedigree 1, c.592G>C;p.Ala198Pro and c.3717G>A;p.Arg1239= in pedigree 2), which were subsequently validated by direct sequencing. c.1210-33_1210-6GT[13]T[5] (also known as IVS8-T5-TG13) was a known disease-causing variant causing the skipping of exon 9 of CFTR and inherited from the proband's mother. p.Gln1352Cys and Ala198Pro were rare or novel in public databases and predicted to be deleterious. The p.Arg1239= was a synonymous variant but located at the end of an exon, which was predicted to alter the splicing pattern. CONCLUSION Our study, in which compound heterozygous variants were identified in two pedigrees, provides more familial evidence that only recessive variants (homozygous or compound heterozygous) in CFTR cause CBAVD. Furthermore, whole exome sequencing may be utilized as a useful tool for mutation screening of genes causing CBAVD.
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Affiliation(s)
- Bin Yang
- Department of Urology, Union Medical College Hospital, Chinese Academy of Medical Science, Peking, Beijing, China
| | - Xi Wang
- Center for Genetics, National Research Institute for Family Planning, Haidian, Beijing, China
| | - Wei Zhang
- Center for Genetics, National Research Institute for Family Planning, Haidian, Beijing, China
| | - Hongjun Li
- Department of Urology, Union Medical College Hospital, Chinese Academy of Medical Science, Peking, Beijing, China
| | - Binbin Wang
- Center for Genetics, National Research Institute for Family Planning, Haidian, Beijing, China
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20
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Al-Sadeq D, Abunada T, Dalloul R, Fahad S, Taleb S, Aljassim K, Al Hamed FA, Zayed H. Spectrum of mutations of cystic fibrosis in the 22 Arab countries: A systematic review. Respirology 2018; 24:127-136. [PMID: 30419605 DOI: 10.1111/resp.13437] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 10/09/2018] [Accepted: 10/22/2018] [Indexed: 12/17/2022]
Abstract
Cystic fibrosis (CF) is an autosomal recessive genetic disease caused by mutations in the CFTR gene, with various clinical manifestations that affect pulmonary, digestive, exocrine and male reproductive functions as well as the bones and kidneys. This study aimed to reveal the spectrum of CFTR gene mutations in Arab CF patients and their corresponding clinical phenotypes among the 22 Arab countries. We searched four literature databases (PubMed, Science Direct, Web of Science and Scopus) from their times of inception to January 2018. All possible search terms were used to encompass the different clinical phenotypes, disease incidences, CFTR mutations, ages and consanguinity rates of CF patients in the 22 Arab countries. Our search strategy identified 678 articles; of these, 72 were eligible for this systematic review. We retrieved data from 18 Arab countries; only 1766 Arab patients with CF were identified, even after additional searches using Google and Google Scholar. The search uncovered a wide spectrum of mutations, some of which are shared with other ethnic groups and some unique to Arab patients. Although the clinical phenotypes of Arab patients were typical of CF, several distinct phenotypes were reported. Despite the rarity of genetic epidemiological studies of CF patients among the 22 Arab nations, the disease is frequently reported in Arab countries where consanguineous marriage is common. Therefore, significant attention should be paid to this problem by implementing carrier and premarital screening, newborn screening and genetic counselling.
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Affiliation(s)
- Duaa Al-Sadeq
- Biomedical Science Department, College of Health Sciences, Qatar University, Doha, Qatar
| | - Taghreed Abunada
- Biomedical Science Department, College of Health Sciences, Qatar University, Doha, Qatar
| | - Rajaa Dalloul
- Biomedical Science Department, College of Health Sciences, Qatar University, Doha, Qatar
| | - Sara Fahad
- Biomedical Science Department, College of Health Sciences, Qatar University, Doha, Qatar
| | - Sara Taleb
- Biomedical Science Department, College of Health Sciences, Qatar University, Doha, Qatar
| | - Kholoud Aljassim
- Biomedical Science Department, College of Health Sciences, Qatar University, Doha, Qatar
| | | | - Hatem Zayed
- Biomedical Science Department, College of Health Sciences, Qatar University, Doha, Qatar
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21
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de Souza DAS, Faucz FR, Pereira-Ferrari L, Sotomaior VS, Raskin S. Congenital bilateral absence of the vas deferens as an atypical form of cystic fibrosis: reproductive implications and genetic counseling. Andrology 2018; 6:127-135. [PMID: 29216686 PMCID: PMC5745269 DOI: 10.1111/andr.12450] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 09/02/2017] [Accepted: 11/07/2017] [Indexed: 01/19/2023]
Abstract
Congenital bilateral absence of the vas deferens (CBAVD) is found in 1% to 2% of males with infertility and is present in 6% of obstructive azoospermia cases. Nearly 95% of men with cystic fibrosis (CF, an autosomal recessive disorder) have CBAVD. There are genetic links between CBAVD and CF. Some mutations in the gene encoding cystic fibrosis transmembrane conductance regulator (CFTR) can lead to CBAVD as a monosymptomatic form of CF. With the use of assisted reproductive techniques (ART), especially testicular or epididymal sperm aspiration, intracytoplasmic sperm injection, and in vitro fertilization, it is possible that men with CBAVD can produce offspring. Therefore, genetic counseling should be offered to couples undergoing ART to discuss the probability of having offspring that carry CFTR gene mutations. The aim of this review was to present the main cause of CBAVD, to call attention to its implications for assisted reproduction, and to show the importance of genetic counseling for couples where men have CBAVD, as they can have offspring with a lethal disease.
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Affiliation(s)
- Denise Andréa Silva de Souza
- Group for Advanced Molecular Investigation (NIMA), School of Health and Biosciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, Paraná, Brazil
- Functional Genomics Laboratory, Carlos Chagas Institute, Oswaldo Cruz Foundation, Curitiba, Paraná, Brazil
| | - Fábio Rueda Faucz
- Group for Advanced Molecular Investigation (NIMA), School of Health and Biosciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, Paraná, Brazil
- Section on Endocrinology & Genetics, Program on Developmental Endocrinology & Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), NIH, Bethesda, MD 20892, USA
| | | | - Vanessa Santos Sotomaior
- Group for Advanced Molecular Investigation (NIMA), School of Health and Biosciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, Paraná, Brazil
| | - Salmo Raskin
- Group for Advanced Molecular Investigation (NIMA), School of Health and Biosciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, Paraná, Brazil
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22
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Yang B, Wang J, Zhang W, Pan H, Li T, Liu B, Li H, Wang B. Pathogenic role of ADGRG2 in CBAVD patients replicated in Chinese population. Andrology 2017; 5:954-957. [PMID: 28805948 DOI: 10.1111/andr.12407] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 06/20/2017] [Accepted: 06/29/2017] [Indexed: 12/20/2022]
Abstract
Congenital bilateral absence of the vas deferens (CBAVD) is an important cause of obstructive azoospermia and male infertility worldwide. Cystic fibrosis transmembrane conductance regulator (CFTR) mutations are the main pathogenic cause, although a proportion of cases are still unexplained. Recently, adhesion G protein-coupled receptor G2 (ADGRG2) gene, a novel pathogenic gene for CBAVD was identified. We did a single population replication study in Chinese CBAVD patients to replicate its role in CBAVD developing. In this study, we performed whole-exome sequencing in 18 unrelated CBAVD patients and identified two missense variants in two patients (c.G1709A, p.C570Y; and c.A2968G, p.K990E). Both variants were predicted to be deleterious and highly conserved in silico. The p.C570Y variant is located in the G protein-coupled receptor (GPCR) proteolysis site domain, which is functionally necessary for autoproteolysis, while the p.K990E variant is in the N-terminal fragment that may regulate activity of the adhesion GPCR. We did not find any potential pathogenic CFTR variants, implying the ADGRG2 variants are the genetic cause in these patients. To the best of our knowledge, these are the first two ADGRG2 variants to be identified in Chinese CBAVD patients, which further validate the disease-causing role of ADGRG2 in this congenital defect.
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Affiliation(s)
- B Yang
- Department of Urology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - J Wang
- Department of Medical Genetics and Developmental Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - W Zhang
- Center for Genetics, National Research Institute for Family Planning, Beijing, China.,Graduate School of Peking Union Medical College, Beijing, China
| | - H Pan
- Center for Genetics, National Research Institute for Family Planning, Beijing, China.,Graduate School of Peking Union Medical College, Beijing, China
| | - T Li
- Center for Genetics, National Research Institute for Family Planning, Beijing, China
| | - B Liu
- Center for Genetics, National Research Institute for Family Planning, Beijing, China
| | - H Li
- Department of Urology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - B Wang
- Center for Genetics, National Research Institute for Family Planning, Beijing, China.,Graduate School of Peking Union Medical College, Beijing, China
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23
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Gaikwad A, Khan S, Kadam S, Kadam K, Dighe V, Shah R, Kulkarni V, Kumaraswamy R, Gajbhiye R. The CFTR gene mild variants poly-T, TG repeats and M470V detection in Indian men with congenital bilateral absence of vas deferens. Andrologia 2017; 50. [PMID: 28776713 DOI: 10.1111/and.12858] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/26/2017] [Indexed: 11/30/2022] Open
Abstract
The aim of the study was to detect the frequency of the CFTR gene variants poly-T, TG repeats and c.1408A>G p.Met470Val (M470V) in Indian men with congenital bilateral absence of the vas deferens (CBAVD). Men diagnosed with CBAVD (n = 76), their female partners (n = 76) and healthy men from general population (n = 50) were recruited. Genomic DNA was isolated and the polymorphic regions of IVS9- c.1210-12T [5] and M470V were amplified using specific primers followed by Sanger's DNA sequencing. A statistically significant increase in the frequency of heterozygous IVS9- c.1210-12T [5] (39.4%) was observed in CBAVD men as compared to controls (14%). The allelic distribution of c.1210-12T [5], c.1210-12T [7] and c.1210-12T [9] in CBAVD men was 21%, 64.4% and 13% and that in healthy controls was 7%, 73% and 20% respectively. Longest TG repeat c.1210-34TG [13] was found in association with c.1210-12T [5] with an allelic frequency of 5.9% in CBAVD men. We found a significant association of c.1210-34TG [12]/c.1210-34TG [13] - c.1210-12[5] -V470 allele in CBAVD men. Twelve female partners harboured a heterozygous c.1210-12T [5] allele. The study emphasises the need to screen both partners for the polymorphisms M470V, poly-T, TG tract repeats in addition to population-specific known CFTR gene mutations.
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Affiliation(s)
- A Gaikwad
- Department of Clinical Research, National Institute for Research in Reproductive Health, Mumbai, India.,Department of Anatomy and Developmental Biology, Monash University, VIC, 3800, Australia
| | - S Khan
- Department of Clinical Research, National Institute for Research in Reproductive Health, Mumbai, India
| | - S Kadam
- Department of Molecular Immunodiagnostics, National Institute for Research in Reproductive Health, Mumbai, India
| | - K Kadam
- Department of Gamete Immunobiology, National Institute for Research in Reproductive Health, Mumbai, India
| | - V Dighe
- National Center for Preclinical Reproductive and Genetic Toxicology, National Institute for Research in Reproductive Health, Mumbai, India
| | - R Shah
- Department of Clinical Research, National Institute for Research in Reproductive Health, Mumbai, India.,Lilavati Hospital and Research Center, Mumbai, India
| | - V Kulkarni
- Department of Clinical Research, National Institute for Research in Reproductive Health, Mumbai, India
| | | | - R Gajbhiye
- Department of Clinical Research, National Institute for Research in Reproductive Health, Mumbai, India
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24
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Yan C, Lang Q, Huijuan L, Jiang X, Ming Y, Huaqin S, Wenming X. CFTR Deletion in Mouse Testis Induces VDAC1 Mediated Inflammatory Pathway Critical for Spermatogenesis. PLoS One 2016; 11:e0158994. [PMID: 27483469 PMCID: PMC4970767 DOI: 10.1371/journal.pone.0158994] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 06/24/2016] [Indexed: 11/22/2022] Open
Abstract
Cystic fibrosis is the most common genetic disease among Caucasians and affects tissues including lung, pancreas and reproductive tracts. It has been shown that Endoplasmic Reticulum (ER) stress and heat shock response are two major deregulated functional modules related to CFTR dysfunction. To identify the impact of CFTR deletion during spermatogenesis, we examined the expression of spermiogenesis-related genes in the testis of CFTR mutant mice (CF mice). We confirmed expression changes of MSY2, a germ cell specific RNA binding protein, resulting from deletion of CFTR in testis. Furthermore, real time PCR and Western blot results showed that an inflammatory response was activated in CF mice testis, as reflected by the altered expression of cytokines. We demonstrate for the first time that expression of MSY2 is decreased in CF mice. Our results suggest that CFTR deletion in testis influences inflammatory responses and these features are likely to be due to the unique environment of the seminiferous tubule during the spermatogenesis process. The current study also suggests avenues to understand the pathophysiology of CFTR during spermatogenesis and provides targets for the possible treatment of CFTR-related infertility.
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Affiliation(s)
- Chen Yan
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
- Key Laboratory of Birth Defects and Related disease of Women and Children, Ministry of Education (Sichuan University), West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
- SCU-CUHK Joint Laboratory for Reproductive Medicine, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Qin Lang
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Liao Huijuan
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
- Key Laboratory of Birth Defects and Related disease of Women and Children, Ministry of Education (Sichuan University), West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
- SCU-CUHK Joint Laboratory for Reproductive Medicine, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Xie Jiang
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
- Third People’s Hospital of Chengdu, the Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu 610031, Sichuan, China
| | - Yang Ming
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
- Key Laboratory of Birth Defects and Related disease of Women and Children, Ministry of Education (Sichuan University), West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
- SCU-CUHK Joint Laboratory for Reproductive Medicine, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Sun Huaqin
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
- Key Laboratory of Birth Defects and Related disease of Women and Children, Ministry of Education (Sichuan University), West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
- SCU-CUHK Joint Laboratory for Reproductive Medicine, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Xu Wenming
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
- Key Laboratory of Birth Defects and Related disease of Women and Children, Ministry of Education (Sichuan University), West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
- SCU-CUHK Joint Laboratory for Reproductive Medicine, West China Second University Hospital, Sichuan University, Chengdu 610041, Sichuan, China
- * E-mail:
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25
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Yang X, Sun Q, Yuan P, Liang H, Wu X, Lai L, Zhang Y. Novel mutations and polymorphisms in the CFTR gene associated with three subtypes of congenital absence of vas deferens. Fertil Steril 2015; 104:1268-75.e1-2. [PMID: 26277102 DOI: 10.1016/j.fertnstert.2015.07.1143] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 06/25/2015] [Accepted: 07/15/2015] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To study the new genotypes in congenital absence of vas deferens (CAVD) and the correlation with different phenotypes, and to investigate the pathogenesis of the disease based on bioinformatics analysis. DESIGN Case-control study. SETTING University-affiliated tertiary teaching hospital. PATIENT(S) Nineteen patients with CAVD and azoospermia. The time period of the study was from May 2013 to April 2014. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) Sanger sequencing was performed in the coding regions and intron-exon boundaries of the cystic fibrosis transmembrane regulator CFTR gene on the polymerase chain reaction (PCR) products. Mutations/variations were identified and compared with the control subjects, and bioinformatics analysis searched in the dbSNP and 1000 Genomes Project. Functional effects of the novel mutations were predicted. Structural modeling of the wild and mutant proteins was also performed. RESULT(S) A total of 8 mutations were identified in 12 patients, 4 of which were novel (c.4433C>G, c.3469-3C>A, c.1357delT, and c.3407C>T). The mutation c.4433C>G occurred in the PSD-95/DLG/ZO-1 (PDZ)-binding motif in the CFTR protein, which was predicted to disrupt the interaction between CFTR and CFTR-associated ligand (CAL). Another missense mutation, c.3407C>T, was predicted to damage and destroy the transmembrane adenosine triphosphate (ATP)-binding cassette domain. The splicing mutation, c.3469-3C>A, was predicted to truncate exon 22 by Human Splicing Finder. The frameshift mutation, c.1357delT, was predicted to introduce a premature stop codon at position 453 and lead to 1,012 amino acids truncation at the carboxyl terminus of the CFTR protein. CONCLUSION(S) This study illustrates the significance of whole exon sequencing of the CFTR gene in patients with CAVD. It is essential for determining the pathogenesis of novel mutations using bioinformatics analysis and to identify correlation between new genotypes and phenotypes.
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Affiliation(s)
- Xiaojian Yang
- Department of Infertility and Sexual Medicine, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Qipeng Sun
- Department of Urology, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Ping Yuan
- Department of Obstetrics and Gynecology, IVF Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Hao Liang
- Center for Quantitative Biology, Peking University, Beijing, People's Republic of China; BNLMS, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, and Peking-Tsinghua Center for Life Sciences at College of Chemistry and Molecular Engineering, Peking University, Beijing, People's Republic of China
| | - Xiao Wu
- Department of Infertility and Sexual Medicine, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Luhua Lai
- Center for Quantitative Biology, Peking University, Beijing, People's Republic of China; BNLMS, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, and Peking-Tsinghua Center for Life Sciences at College of Chemistry and Molecular Engineering, Peking University, Beijing, People's Republic of China
| | - Yan Zhang
- Department of Infertility and Sexual Medicine, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China.
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26
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Liu Y, Wang L, Tian X, Xu KF, Xu W, Li X, Yue C, Zhang P, Xiao Y, Zhang X. Characterization of gene mutations and phenotypes of cystic fibrosis in Chinese patients. Respirology 2015; 20:312-8. [PMID: 25580864 DOI: 10.1111/resp.12452] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 08/03/2014] [Accepted: 09/29/2014] [Indexed: 12/25/2022]
Abstract
BACKGROUND AND OBJECTIVE Cystic fibrosis (CF) is a relatively common autosomal recessive disorder in Caucasians. CF is considered a very rare disease in Asians, and fewer than 30 Chinese CF patients are reported in the literature. We enrolled seven patients of Chinese Han origin diagnosed with CF at the Peking Union Medical College Hospital, to characterize gene mutations and phenotypes of CF in Chinese patients. METHODS We analysed the clinical presentation and screened the coding region of the CFTR gene for each patient. RESULTS Patients were 0-6 years old at onset of symptoms and were 10-28 years old at the time of diagnosis with CF. None of the seven patients had a family history of CF, and only one patient had parents who were consanguineous. Two patients had gastrointestinal symptoms but stool Sudan III results were normal. Four of the seven CF patients also had allergic bronchopulmonary aspergillosis. The concentration of chloride in patients' sweat ranged from 66 mmol/l to 154 mmol/l. In total, we identified 11 different mutations in seven CF patients, including one novel mutation (△E7-E11). Only one of these mutations (R553X) is present in the Caucasian CFTR common mutation-screening panel; and none of the 11 mutations are common in Caucasian CF patients. CONCLUSIONS CF in China is difficult to diagnose because of a combination of low awareness, atypical clinical symptoms, and a lack of sweat and genetic testing facilities in most hospitals. The mutations identified in Chinese CF patients are different from the common Caucasian gene mutations.
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Affiliation(s)
- Yaping Liu
- Department of Medical Genetics, School of Basic Medicine Peking Union Medical College, Beijing, China
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27
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Havasi V. Re: Lu et al.: Different cystic fibrosis transmembrane conductance regulator mutations in Chinese men with congenital bilateral absence of the vas deferens and other acquired obstructive azoospermia (Urology 2013;82:824-828). Urology 2014; 83:678-9. [PMID: 24581531 DOI: 10.1016/j.urology.2013.11.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 11/07/2013] [Accepted: 11/09/2013] [Indexed: 10/25/2022]
Affiliation(s)
- Viktoria Havasi
- Gregory Fleming James Cystic Fibrosis Research Center, Division of Endocrinology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL
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The CFTR M470V, intron 8 poly-T, and 8 TG-repeats detection in Chinese males with congenital bilateral absence of the vas deferens. BIOMED RESEARCH INTERNATIONAL 2014; 2014:689185. [PMID: 24551851 PMCID: PMC3914569 DOI: 10.1155/2014/689185] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 12/10/2013] [Indexed: 11/24/2022]
Abstract
Purpose. To evaluate the significance of molecular detection of cystic fibrosis transmembrane conductance regulator (CFTR) M470V, intron 8 poly-T, and intron 8 TG-repeats in congenital bilateral absence of the vas deferens (CBAVD). Methods. Eighty-nine male patients with CBAVD and 103 healthy males were included in this study. Polymerase chain reaction was performed to amplify the polymorphic regions using primers from conserved regions. M470V was genotyped using real-time PCR by cycling probe. The exon 9 DNA sequence was determined using an automated sequencer. TG-repeats and poly-T were identified by direct sequencing analysis. Results. The 5T allele distribution was 0.32, 0.66 for 7T, and 0.02 for 9T in CBAVD males, respectively. In contrast, the 5T allele distribution was 0.03, 0.96 for 7T, and 0.01 for 9T in healthy control. Study of the polymorphisms of the upstream of exon 9 revealed a higher frequency of 5T allele in the CBAVD males. All cases with TG13T5 haplotype and TG12T5 homozygous led to CBAVD. The CFTR TG12T5-V470 variant haplotype was associated with CBAVD. Conclusion. The 5T allele of intron 8 of CFTR has clinically significant association with CBAVD. TG13T5 and TG12T5 homozygously led to CBAVD, and TG12T5-V470 may also lead to CBAVD.
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