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Shengjia S, Lei W, Tianwei W, Hongmei W, Juanzi S, Sen Q. Compound heterozygous variants in CFTR with potentially reducing ATP-binding ability identified in Chinese infertile brothers with isolated congenital bilateral absence of vas deferens. Mol Genet Genomic Med 2023; 11:e2249. [PMID: 37489040 PMCID: PMC10655520 DOI: 10.1002/mgg3.2249] [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: 02/28/2023] [Revised: 03/23/2023] [Accepted: 07/13/2023] [Indexed: 07/26/2023] Open
Abstract
BACKGROUND Isolated congenital bilateral absence of vas deferens (iCBAVD) in men results in obstructive azoospermia and is mainly caused by pathogenic variants in cystic fibrosis transmembrane conductance regulator (CFTR) or adhesion G protein-coupled receptor G2 (ADGRG2). METHODS The next-generation sequencing (NGS) was used to screen the mutations in the proband, and Sanger sequencings were performed to validate the compound heterozygous variant of CFTR in his family members. Protein structure simulation was performed to discover the potential pathological mechanism. RESULTS This study reported novel compound heterozygous CFTR mutations (NM:000492.4, Intron: 5T; c.3965_3969dupTTGGG: p.R1325Gfs*5) in two brothers with obstructive azoospermia. The compound heterozygous CFTR mutations were first screened out by NGS in an infertile male patient who exhibited iCBAVD from a nonconsanguineous Chinese family. Histological analysis of the testicular biopsy from this patient revealed normal spermatogenesis and mature spermatozoa were observed in the seminiferous tubules. Surprisingly, the same compound heterozygous CFTR mutations were also observed in his brothers who also exhibited iCBAVD, with their parents being a heterozygous carrier for the mutations, as verified by Sanger sequencing. Protein structure simulation revealed that these mutations potentially led to impaired ATP-binding ability of CFTR. CONCLUSION We identified novel compound heterozygous CFTR mutations in two brothers and summarized the literature regarding CFTR mutation and male infertility. Our study may contribute to the genetic diagnosis of iCBAVD and future genetic counseling.
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Affiliation(s)
- Shi Shengjia
- Reproductive CenterNorthwest Women's and Children's HospitalXi'anChina
| | - Wang Lei
- Reproductive CenterNorthwest Women's and Children's HospitalXi'anChina
| | - Wang Tianwei
- Reproductive CenterNorthwest Women's and Children's HospitalXi'anChina
| | - Wang Hongmei
- School of MedicineSoutheast UniversityNanjingChina
| | - Shi Juanzi
- Reproductive CenterNorthwest Women's and Children's HospitalXi'anChina
| | - Qiao Sen
- Reproductive CenterNorthwest Women's and Children's HospitalXi'anChina
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Novel mutation c.1210-3C > G in cis with a poly-T tract of 5T affects CFTR mRNA splicing in a Chinese patient with cystic fibrosis. Front Med 2021; 16:150-155. [PMID: 34302615 DOI: 10.1007/s11684-021-0846-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 12/29/2020] [Indexed: 10/20/2022]
Abstract
Cystic fibrosis (CF) is a rare autosomal recessive disease with only one pathogenic gene cystic fibrosis transmembrane conductance regulator (CFTR). To identify the potential pathogenic mutations in a Chinese patient with CF, we conducted Sanger sequencing on the genomic DNA of the patient and his parents and detected all 27 coding exons of CFTR and their flanking intronic regions. The patient is a compound heterozygote of c.2909G > A, p.Gly970Asp in exon 18 and c.1210-3C > G in cis with a poly-T of 5T (T5) sequence, 3 bp upstream in intron 9. The splicing effect of c.1210-3C > G was verified via minigene assay in vitro, indicating that wild-type plasmid containing c.1210-3C together with T7 sequence produced a normal transcript and partial exon 10-skipping-transcript, whereas mutant plasmid containing c.1210-3G in cis with T5 sequence caused almost all mRNA to skip exon 10. Overall, c.1210-3C > G, the newly identified pathogenic mutation in our patient, in combination with T5 sequence in cis, affects the CFTR gene splicing and produces nearly no normal transcript in vitro. Moreover, this patient carries a p.Gly970Asp mutation, thus confirming the high-frequency of this mutation in Chinese patients with CF.
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Khedri A, Farahmandi AY, Moghaveleh M, Baghbani KA, Khoob SN, Moghbelinejad S, Asadi F. TG12-T5-V470 haplotype in the CFTR gene is associated with non-obstructive azoospermia in Iranian infertile men. GENE REPORTS 2021. [DOI: 10.1016/j.genrep.2021.101095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abdul-Qadir AG, Al-Musawi BM, Thejeal RF, Al-Omar SAB. Molecular analysis of CFTR gene mutations among Iraqi cystic fibrosis patients. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2021; 22:45. [PMID: 38624701 PMCID: PMC8110311 DOI: 10.1186/s43042-021-00164-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 03/31/2021] [Indexed: 11/10/2022] Open
Abstract
Background Cystic fibrosis (CF) is an autosomal recessive multisystem disease that results from mutation(s) of the cystic fibrosis transmembrane conductance regulator (CFTR) gene. More than 2100 mutations and polymorphisms have been reported in this gene so far. Incidence and genotyping of CF are under-identified in Iraq. This study aims to determine the types and frequencies of certain CFTR mutations among a sample of Iraqi CF patients. Two groups of patients were included: 31 clinically confirmed CF patients in addition to 47 clinically suspected patients of CF. All confirmed patients had typical, moderate-severe clinical presentation and course of the disease. Molecular analysis was performed on the majority of enrolled patients using the CF-stripAssay® kit supplied by ViennaLab diagnostics, GmbH, Austria. Results The mutation-detection rate from the tested 34 mutations in this study was 19.5% and the 8 detected mutations were as follows: 3120+1G>A and W1282X were found in 3 (4.17%) patients each; F508del and R1162X were found in 2 (2.78%) patients each; 3272-26A>G, R347P, I507del, and 2183AA>G were found in 1 (1.38%) patient each. Polymorphic variants of IVS8, namely 5T, 7T, and 9T, were detected in ~ 70%. These results were nearly similar to what was reported in regional countries. Conclusion Cystic fibrosis seems to be not rare as previously thought. 3120+1G>A and W1282X are the two most commonly detected mutations. F508del needs to be included in all future tests, while the I507del mutation was uniquely reported in this study but not in regional studies.
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Affiliation(s)
- Asal Gailan Abdul-Qadir
- Department of Medical Genetics, Kamal Alsamaraey Hospital (Infertility Center), Ministry of Health, Baghdad, Iraq
| | - Bassam Musa Al-Musawi
- Department of Pathology and Forensic Medicine, College of Medicine, University of Baghdad, Baghdad, Iraq
| | - Rabab Farhan Thejeal
- Children Welfare Hospital, Medical City, Baghdad, Iraq
- Department of Pediatrics, College of Medicine, University of Baghdad, Baghdad, Iraq
| | - Saad Abdul-Baqi Al-Omar
- Department of Pathology and Forensic Medicine, College of Medicine, University of Basra, Basra, Iraq
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Karimi N, Bidemeshki Pour A, Alibakhshi R, Almasi S. Haplotype analysis of the CFTR gene on normal and mutant CFTR genes. Mutat Res 2020; 821:111708. [PMID: 32563932 DOI: 10.1016/j.mrfmmm.2020.111708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 05/19/2020] [Indexed: 01/06/2023]
Abstract
BACKGROUND Mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene are responsible for Cystic Fibrosis (CF) disease. Since the distribution of polymorphisms varies among populations, a comparison between the frequency of CFTR polymorphisms in patients and healthy population may further identify their role in CF disease. The results obtained from this research may facilitate the prediction of disease phenotype in prenatal diagnosis or newborn screening program as well as determine the possible associations between haplotypes and specific mutations. METHODS Blood samples collected from 27 unrelated West Iranian families contain at least one CF patient and 55 control families with no history of CF. Samples were analyzed for c.1210-12 T [5-9], c.1242-35-1242-12GT [8-10], c.744-33GATT [6-8] and c.869 + 11C > T polymorphisms by automated direct DNA sequencing following DNA extraction. RESULTS Our results showed that the T7 allele is the most common allele in normal and non-ΔF508 CF chromosomes with the frequencies of 93.6% and 100%, respectively. Conversely, T9 was the only allele detected in ΔF508 chromosomes. Moreover, the c.1242-35-1242-12GT analysis showed that (TG)11 repeat was the most common dinucleotide repeat in both, non-ΔF508 and normal chromosomes with the frequencies of 91% and 71%, respectively. The c.744-33GATT and c.869 + 11C > T polymorphism analyses indicated that (GATT)6 and T allele are only found in ΔF508 CF chromosomes. Besides, the [T7-TG11-GATT7-C] haplotype was the most common haplotype in both, normal and non-ΔF508 CF subjects while the [T9-TG10- GATT6-T] haplotype was only detected in CF patients carrying ΔF508 mutation. CONCLUSIONS Our findings identified an informative haplotype that could be used in genetic counseling, prenatal diagnosis and future screening of CF in Iran.
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Affiliation(s)
- Nasibeh Karimi
- Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran; Krefting Research Centre, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - Ali Bidemeshki Pour
- Department of Biology, Faculty of Science, Razi University, Kermanshah, Iran
| | - Reza Alibakhshi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Shekoufeh Almasi
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ontario, Canada
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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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Wang W, Sun XT, Weng XL, Zhou DZ, Sun C, Xia T, Hu LH, Lai XW, Ye B, Liu MY, Jiang F, Gao J, Bo LM, Liu Y, Liao Z, Li ZS. Comprehensive screening for PRSS1, SPINK1, CFTR, CTRC and CLDN2 gene mutations in Chinese paediatric patients with idiopathic chronic pancreatitis: a cohort study. BMJ Open 2013; 3:e003150. [PMID: 24002981 PMCID: PMC3773632 DOI: 10.1136/bmjopen-2013-003150] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 07/24/2013] [Accepted: 07/26/2013] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVE Genetic alterations may contribute to chronic pancreatitis (CP) in Chinese young patients. This study was designed to investigate mutations of cationic trypsinogen (PRSS1), pancreatic secretory trypsin inhibitor or serine protease inhibitor Kazal type 1 (SPINK1), cystic fibrosis transmembrane conductance regulator (CFTR), chymotrypsin C (CTRC) and CLDN2 genes and the copy number variations (CNVs) of PRSS1 and asses associations with the development of idiopathic CP (ICP) in Chinese children. DESIGN Retrospective. SETTING A single center. PARTICIPANTS 75 ICP Chinese children (40 boys and 35 girls). PRIMARY AND SECONDARY OUTCOME MEASURES Mutations of PRSS1, SPINK1, CFTR, CTRC and CLDN2 genes and CNVs. RESULTS 7 patients had heterozygous mutations in PRSS1, that is, N29I (n=1), R122H or R122C (n=6). The CNVs of PRSS1 in five patients had abnormal copies (1 copy (n=4), five copies (n=1)). 43 patients had IVS3+2T>C (rs148954387) (10 homozygous and 33 heterozygous) in SPINK1. None of the PRSS1 mutation patients carried a SPINK1 mutation. Frequency of PRSS1 and SPINK1 mutations was 9.3% and 57.3%, respectively, with an overall frequency of 66.6% (50/75). In addition, one patient had a novel deletion of CFTR (GCTTCCTA from c.500 to c.508 leading to the shortened polypeptide molecule via a stop codon). Another patient had a novel missense in CLDN2 exon 2 (c.592A>C mutation). Clinically, patients with SPINK1 mutations had a higher rate of pancreatic duct stones, pancreatic pseudocyst and pancreatic calcification than those without SPINK1 mutations (p<0.05). CONCLUSIONS SPINK1 mutations were more commonly associated with Chinese children with ICP. SPINK1 IVS3+2T>C mutation may play an important role in the pathogenesis of Chinese paediatric ICP. However, further study is needed to confirm and to investigate the role of these genes in the development of Chinese ICP.
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Affiliation(s)
- Wei Wang
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
| | - Xiao-Tian Sun
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
| | - Xiao-Ling Weng
- Key Laboratory of Developmental Genetics and Neuropsychiatric Diseases (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Dai-Zhan Zhou
- Key Laboratory of Developmental Genetics and Neuropsychiatric Diseases (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Chang Sun
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
| | - Tian Xia
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
| | - Liang-Hao Hu
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
| | - Xiao-Wei Lai
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
| | - Bo Ye
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
| | - Mu-Yun Liu
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
| | - Fei Jiang
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
| | - Jun Gao
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
| | - Lu-Min Bo
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
| | - Yun Liu
- Key Laboratory of Developmental Genetics and Neuropsychiatric Diseases (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Zhuan Liao
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
| | - Zhao-Shen Li
- Department of Gastroenterology, Changhai Hospital, The Second Military Medicine University, Shanghai, China
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CFTR haplotypes in northern Iranian population. Gene 2013; 512:55-60. [DOI: 10.1016/j.gene.2012.09.096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 09/14/2012] [Accepted: 09/27/2012] [Indexed: 11/17/2022]
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Wang P, Naruse S, Yin H, Yu Z, Zhuang T, Ding W, Wu Y, Wei M. The susceptibility of T5-TG12 of the CFTR gene in chronic bronchitis occurrence in a Chinese population in Jiangsu province, China. J Biomed Res 2012; 26:410-7. [PMID: 23554779 PMCID: PMC3597042 DOI: 10.7555/jbr.26.20120015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Revised: 02/29/2012] [Accepted: 04/06/2012] [Indexed: 11/03/2022] Open
Abstract
Mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene have been implicated in the onset of cystic fibrosis and other clinical respiratory disorders. In the present study, we investigated the role of CFTR variations, poly-T, TG-repeats, and M470V in susceptibility to bronchial asthma and chronic bronchitis in a Chinese population in Jiangsu province, China. A total of 72 bronchial asthma patients, 68 chronic bronchitis patients, and 117 healthy subjects were included in this study. The Tn-TGm haplotype was sequenced and the CFTR variant M470V was detected using restriction fragment length polymorphism (RFLP). We found that the frequency of T5-TG12-V470 in chronic bronchitis patients was 0.07%, which was notably higher than that in healthy subjects (0.01%) and bronchial asthma patients (0.04%). Thus, the presence of the T5-TG12 haplotype of the CFTR gene is likely to play a role in the development and progression of respiratory conditions, such as chronic bronchitis.
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Affiliation(s)
- Ping Wang
- Department of Traditional Chinese Medicine, the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu 210029, China
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Chernykh VB, Stepanova AA, Beskorovainaya TS, Sorokina TM, Shileiko LV, Kurilo LF, Polyakov AV. The frequency and spectrum of mutations and the IVS8-T polymorphism of the CFTR gene in Russian infertile men. RUSS J GENET+ 2010. [DOI: 10.1134/s1022795410060165] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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