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Li X, Xie L, Dai J, Zhou X, Chen T, Mao W. A whole-exome sequencing study of patent foramen ovale: investigating genetic variants and their association with cardiovascular disorders. Front Genet 2024; 15:1405307. [PMID: 38808331 PMCID: PMC11130352 DOI: 10.3389/fgene.2024.1405307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 04/30/2024] [Indexed: 05/30/2024] Open
Abstract
Background Patent foramen ovale (PFO) has a genetic predisposition and is closely associated with cryptogenic stroke (CS), migraine, decompression sickness, and hypoxemia. Identifying PFO-related mutant genes through whole-exome sequencing (WES) can help in the early recognition of cardiovascular genetic risk factors, guide timely clinical intervention, and reduce the occurrence of cardiovascular events. Methods We analyzed mutant genes from ClinVar and OMIM databases. WES was performed on 25 PFO patients from Zhejiang Provincial Hospital of Chinese Medicine. Pathogenicity of variants was evaluated using American College of Medical Genetics and Genomics (ACMG) and Association for Molecular Pathology. (AMP) guidelines. Results In ClinVar (4 Feb 2023), 113 coding gene mutations were found, including 83 associated with PFO. From OMIM (18 Apr 2023), 184 gene mutations were analyzed, with 110 mutant coding genes. WES identified pathogenic mutations in two of 25 PFO patients (8%). LDLR, SDHC, and NKX2-5 genes were linked to PFO and primarily involved in myocardial tissue function. NKX2-5 may play a crucial role in PFO development, interacting with NOTCH1, GATA4, MYH6, SCN5A signaling pathways regulating cardiomyocyte characteristics. Conclusion We identified pathogenic mutations in LDLR, SDHC, and NKX2-5 genes, implying their role in PFO development. Functional enrichment analysis revealed NKX2-5's interaction with signaling pathways regulating cardiomyocyte function. These findings enhance our understanding of PFO's genetic basis, suggesting potential therapeutic targets for future research.
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Affiliation(s)
- Xinyi Li
- The First School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Lingling Xie
- The First School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jin Dai
- Cardiovascular Department, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, China
| | - Xinbin Zhou
- Cardiovascular Department, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, China
| | - Tingting Chen
- The First School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
- Medical Laboratory, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, China
| | - Wei Mao
- Department of Cardiology, Affiliated Zhejiang Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Zhejiang Key Laboratory of Integrative Chinese and Western Medicine for Diagnosis and Treatment of Circulatory Diseases, Hangzhou, China
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2
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Chen H, Li T, Wu Y, Wang X, Wang M, Wang X, Fang X. Association between single-nucleotide polymorphisms of NKX2.5 and congenital heart disease in Chinese population: A meta-analysis. Open Life Sci 2022; 17:473-482. [PMID: 35647298 PMCID: PMC9102305 DOI: 10.1515/biol-2022-0058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/18/2022] [Accepted: 03/03/2022] [Indexed: 11/15/2022] Open
Abstract
Abstract
NKX2.5 is a transcription factor that plays a key role in cardiovascular growth and development. Several independent studies have been previously conducted to investigate the association between the single-nucleotide polymorphism (SNP) 606G >C (rs3729753) in the coding region of NKX2.5 and congenital heart disease (CHD). However, the results of these studies have been inconsistent. Therefore, the present study aimed to reveal the relationship between NKX2.5 SNP 606G >C and the risk of CHD as possible in the Chinese population through meta-analysis. After retrieving related articles in PubMed, MEDLINE, EMBASE, Web of science, Cochrane, China National Knowledge Infrastructure, Wanfang DATA, and VIP database until August 2021, a total of eight studies were included in the present meta-analysis. The qualified research data were then merged into allele, dominant, recessive, heterozygous, homozygous, and additive models. Overall results of the current meta-analysis showed that 606G >C was not associated with CHD of the Chinese population in any model. In addition, subgroup analysis based on CHD type gave the same negative result. Results of sensitivity analysis showed that there was no significant correlation after the deletion of each study. Furthermore, it was noted that the results were negative and the heterogeneity was not significant. In conclusion, it was evident that NKX2-5 SNP 606G >C may not lead to the risk of CHD in Chinese population.
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Affiliation(s)
- Huan Chen
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University , Changsha , Hunan , China
| | - Tianjiao Li
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University , Changsha , Hunan , China
| | - Yuqing Wu
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University , Changsha , Hunan , China
| | - Xi Wang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University , Changsha , Hunan , China
| | - Mingyuan Wang
- Department of Pathophysiology, Xiangya Medical College, Central South University , Changsha , Hunan , China
| | - Xin Wang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University , Changsha , Hunan , China
| | - Xiaoling Fang
- Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University , Changsha , Hunan , China
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3
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EL Bouchikhi I, Belhassan K, Moufid FZ, Bouguenouch L, Samri I, Iraqui Houssaïni M, Ouldim K, Atmani S. Screening of NKX2.5 gene in Moroccan Tetralogy of Fallot (TOF) patients: worldwide mutation rate comparisons show a significant association between R25C variant and TOF phenotype. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2021. [DOI: 10.1186/s43042-021-00136-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Abstract
Background
Tetralogy of Fallot is the most prevalent cyanotic congenital heart disease, occurring in 1/3 600 live births. This disorder comprises ventricular septal defect, right ventricular outflow obstruction, over-riding aorta, and right ventricular hypertrophy. The present study aims to reveal the spectrum of Nk2 homeobox 5 (NKX2-5) variants identified in a Moroccan non-syndromic tetralogy of Fallot cohort and to compare mutation rate with different studies from all over the world. Thirty-one patients with non-syndromic tetralogy of Fallot were recruited in this cross-sectional study. DNAs were extracted, and coding regions of NKX2.5 were PCR-amplified and sequenced. The obtained sequences were analyzed using different bioinformatics tools. Statistical comparisons were carried out using the R software.
Results
R25C mutation was found in two patients, in association with the E21E variant. The latter variant was frequently observed in the population and seems to have a potential altering effect on the splicing process. The NKX2.5 mutation rate in our tetralogy of Fallot population is around 6.4%, and no significant difference was noticed in comparison with previous studies. At the same time, a comparison of R25C mutation rate between atrial septal defect and tetralogy of Fallot worldwide populations shows a particular association of R25C mutation with tetralogy of Fallot phenotype.
Conclusions
This study reveals a consistency between our NKX2.5 mutation rate and those of different tetralogy of Fallot populations around the world. Our findings suggest a possible combined effect of R25C mutation and E21E variant on the carriers and emphasize particularly the significant association of R25C mutation with tetralogy of Fallot, which highlights the importance of an anticipative screening for TOF phenotype among the carriers’ offspring at the perinatal period.
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4
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Association of NFKB1, NKX2-5, GATA4 and RANKL Gene Polymorphisms with Sporadic Congenital Heart Disease in Greek Patients. Balkan J Med Genet 2021; 24:15-20. [PMID: 34447654 PMCID: PMC8366470 DOI: 10.2478/bjmg-2021-0014] [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] [Indexed: 12/17/2022] Open
Abstract
Congenital heart disease (CHD) is a group of structural defects of the heart and the great vessels, and one of the leading causes of death among infants and young adults. Several gene variants are involved in diverse mechanisms of cardiac and vessel development and could thus be considered candidate mutated genes for a congenital heart defect or a specific variant could predispose a person to CHD. In the present study, variants in four such genes are investigated for the first time in a group of young Greek CHD patients: the NFKB1 gene polymorphism (-94ins/ delATTG), rs28362491, NKX2-5 gene polymorphism rs2277923, GATA4 gene polymorphism rs11785481 and RANKL gene polymorphism rs4531631. A total of 43 CHD patients and 100 healthy adults were included in the study. The polymerase chain reaction-restriction fragment length polymorphism (PRC-RFLP) method was used to genotype the aforementioned polymorphisms of NFKB1, NKX2-5, GATA4 and RANKL. The association analysis identified that there was a protective association between CHD and the A allele of rs2277923 polymorphism (p = 0.004). The D allele of the rs28362491 polymorphism is also a likely risk factor for causing CHD (p = 0.006). The differences of the rs4531631 and rs11785481 variant contribution had no statistical significance between the groups (p >0.05). In conclusion, our results revealed that the rs28362491 and rs2277923 gene polymorphisms, but not the rs4531631 and rs11785481 polymorphisms, may contribute to CHD risk in a cohort of Greek CHD patients.
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Ashiq S, Ashiq K, Sabar MF. The role of NKX2-5 gene polymorphisms in congenital heart disease (CHD): a systematic review and meta-analysis. Egypt Heart J 2021; 73:72. [PMID: 34417931 PMCID: PMC8380205 DOI: 10.1186/s43044-021-00199-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 08/15/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND The gene NKX2-5 is a key transcription factor that plays an essential role in normal cardiac development. Although some recent studies have studied the role of polymorphisms in the NKX2-5 gene in congenital heart diseases (CHDs), the results were not consistent and remained uncertain. Therefore, we conduct a review of literature and investigate the association of genetic polymorphisms with CHDs. RESULTS We selected seventeen studies regarding the association of NKX2-5 gene rs2277923 polymorphism with CHDs. Overall, in all the tested genetic models, the 63A > G polymorphism was not significantly associated with increased congenital heart defects risk. We used pooled odds ratios (OR) to calculate the association of CHDs with rs2277923 including allelic model: OR 1.00, 95% CI 0.82-1.21; homozygote model: OR 0.95, 95%CI 0.68-1.33, recessive model: OR 0.89 CI 0.70-1.13, heterozygote model: OR: 1.09, 95%CI 0.87-1.37, dominant model: OR 1.08 CI 0.82-1.42 and overdominant model: OR 1.17 CI 1.01-1.35. In addition, our analysis suggests that no publication bias exists in this meta-analysis. CONCLUSIONS Our findings suggested that 63A > G polymorphism in the NKX2-5 gene was not significantly associated with congenital heart defects. However, in the future, more studies with increased sample size are required that may provide us more definite conclusions.
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Affiliation(s)
- Sana Ashiq
- Centre for Applied Molecular Biology, University of the Punjab, 87-West Canal Bank Road, Thokar Niaz Baig, Lahore, 53700, Pakistan.
| | - Kanwal Ashiq
- Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan.,Faculty of Pharmaceutical Sciences, Superior University, Lahore, Pakistan
| | - Muhammad Farooq Sabar
- Centre for Applied Molecular Biology, University of the Punjab, 87-West Canal Bank Road, Thokar Niaz Baig, Lahore, 53700, Pakistan
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6
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Abstract
Cardiac development is a complex developmental process that is initiated soon after gastrulation, as two sets of precardiac mesodermal precursors are symmetrically located and subsequently fused at the embryonic midline forming the cardiac straight tube. Thereafter, the cardiac straight tube invariably bends to the right, configuring the first sign of morphological left–right asymmetry and soon thereafter the atrial and ventricular chambers are formed, expanded and progressively septated. As a consequence of all these morphogenetic processes, the fetal heart acquired a four-chambered structure having distinct inlet and outlet connections and a specialized conduction system capable of directing the electrical impulse within the fully formed heart. Over the last decades, our understanding of the morphogenetic, cellular, and molecular pathways involved in cardiac development has exponentially grown. Multiples aspects of the initial discoveries during heart formation has served as guiding tools to understand the etiology of cardiac congenital anomalies and adult cardiac pathology, as well as to enlighten novels approaches to heal the damaged heart. In this review we provide an overview of the complex cellular and molecular pathways driving heart morphogenesis and how those discoveries have provided new roads into the genetic, clinical and therapeutic management of the diseased hearts.
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7
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González-Castro TB, Tovilla-Zárate CA, López-Narvaez ML, Juárez-Rojop IE, Calderón-Colmenero J, Sandoval JP, García-Montes JA, Blachman-Braun R, Castillo-Avila RG, García-Flores E, Cazarín-Santos BG, Borgonio-Cuadra VM, Posadas-Sánchez R, Vargas-Alarcón G, Rodríguez-Pérez JM, Pérez-Hernández N. Association between congenital heart disease and NKX2.5 gene polymorphisms: systematic review and meta-analysis. Biomark Med 2020; 14:1747-1757. [PMID: 33346701 DOI: 10.2217/bmm-2020-0190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: To analyze the association of NKX2.5 gene with congenital heart disease (CHD), and to determine if the variants rs703752, rs3729753 and rs2277923 increase the risk for developing CHD. Materials & methods: PubMed, EBSCO and Web of Science databases were screened to identify eligible studies. Through a comprehensive meta-analysis software, the association between NKX2.5 gene variants and susceptibility of CHD was calculated by pooled odd ratio (ORs) and 95% CI. Results: We observed that the allelic model of rs703752 and rs2277923 increased the risk in the overall population: OR = 1.24; 95% CI: 1.00-1.55; Z p-value = 0.049; OR = 1.18; 95% CI: 0.01-1.37; Z p-value = 0.036; respectively. Conclusion: Our results suggested that the rs703752 and rs2277923 polymorphisms of the NKX2.5 gene are associated with CHD.
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Affiliation(s)
- Thelma B González-Castro
- Multidisciplinary Academic Division of Jalpa de Méndez, Universidad Juárez Autónoma de Tabasco, Jalpa de Méndez, Tabasco, Mexico
| | - Carlos A Tovilla-Zárate
- Multidisciplinary Academic Division of Comalcalco, Universidad Juárez Autónoma de Tabasco, Comalcalco, Tabasco, Mexico
| | - María L López-Narvaez
- General Hospital of Yajalón Manuel Velasco Siles, Secretaría de Salud, Yajalón, Chiapas, Mexico
| | - Isela E Juárez-Rojop
- Academic Division of Health Sciences, Universidad Juárez Autónoma de Tabasco, Villahermosa, Tabasco, Mexico
| | - Juan Calderón-Colmenero
- Department of Pediatric Cardiology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Juan P Sandoval
- Laboratory of Hemodynamics & Intervention in Congenital Heart Disease, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - José A García-Montes
- Laboratory of Hemodynamics & Intervention in Congenital Heart Disease, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Ruben Blachman-Braun
- Department of Urology, University of Miller School of Medicine, Miami, FL 33136, USA
| | - Rosa G Castillo-Avila
- Academic Division of Health Sciences, Universidad Juárez Autónoma de Tabasco, Villahermosa, Tabasco, Mexico.,Department of Molecular Biology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Esbeidy García-Flores
- Department of Molecular Biology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Benny G Cazarín-Santos
- Department of Molecular Biology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Verónica M Borgonio-Cuadra
- Department of Genetics, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
| | | | - Gilberto Vargas-Alarcón
- Department of Molecular Biology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - José M Rodríguez-Pérez
- Department of Molecular Biology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Nonanzit Pérez-Hernández
- Department of Molecular Biology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
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8
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Zhao M, Diao J, Huang P, Li J, Li Y, Yang Y, Luo L, Zhang S, Chen L, Wang T, Zhu P, Qin J. Association of Maternal Diabetes Mellitus and Polymorphisms of the NKX2.5 Gene in Children with Congenital Heart Disease: A Single Centre-Based Case-Control Study. J Diabetes Res 2020; 2020:3854630. [PMID: 33062711 PMCID: PMC7533784 DOI: 10.1155/2020/3854630] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 07/19/2020] [Accepted: 08/04/2020] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Congenital heart disease (CHD) is one of the most common birth defects among newborns, accounting for a large proportion of infant mortality worldwide. However, the mechanisms remain largely undefinable. This study aimed to investigate the association of CHD in offspring of mothers with diabetes mellitus (DM) and single nucleotide polymorphisms (SNPs) of NKX2.5. METHODS AND RESULTS A case-control study of 620 mothers of CHD patients and 620 mothers of healthy children admitted to Hunan Children's Hospital from November 2017 to December 2019 was conducted. We collected the mothers' information by questionnaire and detected children's NKX2.5 variants with a MassARRAY system. The interaction coefficient (γ) was used to quantify the estimated gene-environment interactions. Univariate and multivariate analyses both showed that the infants had a higher risk of CHD if their mothers had a history of DM, including gestational DM (GDM) during this pregnancy (adjusted odds ratio [aOR = 4.98]), GDM in previous pregnancies (aOR = 4.30), and pregestational DM (PGDM) in the 3 months before this pregnancy (aOR = 6.78). Polymorphisms of the NKX2.5 gene at rs11802669 (C/C vs. T/T: aOR = 4.97; C/T vs. T/T: aOR = 2.15) and rs2277923 (T/T vs. C/C, aOR = 1.74; T/C vs. C/C, aOR = 1.61) were significantly associated with the risk of CHD in offspring. In addition, significant interactions between maternal DM and NKX2.5 genetic variants at rs11802669 (aOR = 8.12) and rs2277923 (aOR = 17.72) affecting the development of CHD were found. CONCLUSIONS These results suggest that maternal DM, NKX2.5 genetic variants, and their interactions are significantly associated with the risk of CHD in offspring.
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Affiliation(s)
- Mingyi Zhao
- Department of Pediatrics, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jingyi Diao
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Peng Huang
- Department of Cardiothoracic Surgery, Hunan Children's Hospital, Changsha, Hunan, China
| | - Jinqi Li
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Yihuan Li
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Yang Yang
- Department of Pediatrics, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Liu Luo
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Senmao Zhang
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Letao Chen
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Tingting Wang
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
| | - Ping Zhu
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
| | - Jiabi Qin
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, Hunan, China
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
- National Health Commission Key Laboratory for Birth Defect Research and Prevention, Changsha, Hunan, China
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9
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Sveinbjornsson G, Olafsdottir EF, Thorolfsdottir RB, Davidsson OB, Helgadottir A, Jonasdottir A, Jonasdottir A, Bjornsson E, Jensson BO, Arnadottir GA, Kristinsdottir H, Stephensen SS, Oskarsson G, Gudbjartsson T, Sigurdsson EL, Andersen K, Danielsen R, Arnar DO, Jonsdottir I, Thorsteinsdottir U, Sulem P, Thorgeirsson G, Gudbjartsson DF, Holm H, Stefansson K. Variants in NKX2-5 and FLNC Cause Dilated Cardiomyopathy and Sudden Cardiac Death. CIRCULATION-GENOMIC AND PRECISION MEDICINE 2019; 11:e002151. [PMID: 30354339 DOI: 10.1161/circgen.117.002151] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Dilated cardiomyopathy (DCM) is an important cause of heart failure. Variants in >50 genes have been reported to cause DCM, but causative variants have been found in less than half of familial cases. Variants causing DCM in Iceland have not been reported before. METHODS We performed a genome-wide association study on DCM based on whole genome sequencing. We tested the association of 32.5 million sequence variants in 424 cases and 337 689 population controls in Iceland. RESULTS We identified 2 DCM variants in established cardiomyopathy genes, a missense variant p.Phe145Leu in NKX2-5 carried by 1 in 7100 Icelanders ( P=7.0×10-12) and a frameshift variant p.Phe1626Serfs*40 in FLNC carried by 1 in 3600 Icelanders ( P=2.1×10-10). Both variants associate with heart failure and sudden cardiac death. Additionally, p.Phe145Leu in NKX2-5 associates with high degree atrioventricular block and atrial septal defect ( P<1.4×10-4). The penetrance of serious heart disease among carriers of the NKX2-5 variant is high and higher than that of the FLNC variant. CONCLUSIONS Two rare variants in NKX2-5 and FLNC, carried by 1 in 2400 Icelanders, cause familial DCM in Iceland. These genes have recently been associated with DCM. Given the serious consequences of these variants, we suggest screening for them in individuals with DCM and their family members, with subsequent monitoring of carriers, offering early intervention.
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Affiliation(s)
- Gardar Sveinbjornsson
- deCODE genetics/Amgen, Inc, Reykjavik, Iceland (G.S., E.F.O., R.B.T., O.B.D., A.H.,School of Engineering and Natural Sciences (G.S., D.F.G.)
| | - Eva F Olafsdottir
- deCODE genetics/Amgen, Inc, Reykjavik, Iceland (G.S., E.F.O., R.B.T., O.B.D., A.H.,Faculty of Medicine (E.F.O., E.B., H.K., T.G., K.A., D.O.A., I.J., U.T., G.T., K.S.)
| | | | - Olafur B Davidsson
- deCODE genetics/Amgen, Inc, Reykjavik, Iceland (G.S., E.F.O., R.B.T., O.B.D., A.H
| | - Anna Helgadottir
- deCODE genetics/Amgen, Inc, Reykjavik, Iceland (G.S., E.F.O., R.B.T., O.B.D., A.H
| | | | | | - Eythor Bjornsson
- Adalbjorg Jonasdottir, Aslaug Jonasdottir, E.B., B.O.J., G.A.A., D.O.A., I.J., U.T., P.S., G.T., D.F.G., H.H., K.S.).,Faculty of Medicine (E.F.O., E.B., H.K., T.G., K.A., D.O.A., I.J., U.T., G.T., K.S.)
| | - Brynjar O Jensson
- Adalbjorg Jonasdottir, Aslaug Jonasdottir, E.B., B.O.J., G.A.A., D.O.A., I.J., U.T., P.S., G.T., D.F.G., H.H., K.S.)
| | - Gudny A Arnadottir
- Adalbjorg Jonasdottir, Aslaug Jonasdottir, E.B., B.O.J., G.A.A., D.O.A., I.J., U.T., P.S., G.T., D.F.G., H.H., K.S.)
| | | | - Sigurdur S Stephensen
- Department of Pediatric Cardiology, Children's Hospital Reykjavik, Iceland (S.S.S., G.O.)
| | - Gylfi Oskarsson
- Department of Pediatric Cardiology, Children's Hospital Reykjavik, Iceland (S.S.S., G.O.)
| | - Tomas Gudbjartsson
- Faculty of Medicine (E.F.O., E.B., H.K., T.G., K.A., D.O.A., I.J., U.T., G.T., K.S.).,Department of Cardiothoracic Surgery (T.G.)
| | - Emil L Sigurdsson
- Department of Family Medicine (E.L.S.), University of Iceland, Reykjavik.,Department of Development, Primary Health Care of the Capital Area, Reykjavik, Iceland (E.L.S.)
| | - Karl Andersen
- Faculty of Medicine (E.F.O., E.B., H.K., T.G., K.A., D.O.A., I.J., U.T., G.T., K.S.).,Department of Medicine, Landspitali University Hospital, Reykjavik, Iceland (K.A., R.D., D.O.A., G.T.)
| | - Ragnar Danielsen
- Department of Medicine, Landspitali University Hospital, Reykjavik, Iceland (K.A., R.D., D.O.A., G.T.)
| | - David O Arnar
- Adalbjorg Jonasdottir, Aslaug Jonasdottir, E.B., B.O.J., G.A.A., D.O.A., I.J., U.T., P.S., G.T., D.F.G., H.H., K.S.).,Faculty of Medicine (E.F.O., E.B., H.K., T.G., K.A., D.O.A., I.J., U.T., G.T., K.S.).,Department of Medicine, Landspitali University Hospital, Reykjavik, Iceland (K.A., R.D., D.O.A., G.T.)
| | - Ingileif Jonsdottir
- Adalbjorg Jonasdottir, Aslaug Jonasdottir, E.B., B.O.J., G.A.A., D.O.A., I.J., U.T., P.S., G.T., D.F.G., H.H., K.S.).,Faculty of Medicine (E.F.O., E.B., H.K., T.G., K.A., D.O.A., I.J., U.T., G.T., K.S.).,Department of Immunology, Landspitali, The National University Hospital of Iceland, Reykjavik (I.J.)
| | - Unnur Thorsteinsdottir
- Adalbjorg Jonasdottir, Aslaug Jonasdottir, E.B., B.O.J., G.A.A., D.O.A., I.J., U.T., P.S., G.T., D.F.G., H.H., K.S.).,Faculty of Medicine (E.F.O., E.B., H.K., T.G., K.A., D.O.A., I.J., U.T., G.T., K.S.)
| | - Patrick Sulem
- Adalbjorg Jonasdottir, Aslaug Jonasdottir, E.B., B.O.J., G.A.A., D.O.A., I.J., U.T., P.S., G.T., D.F.G., H.H., K.S.)
| | - Gudmundur Thorgeirsson
- Adalbjorg Jonasdottir, Aslaug Jonasdottir, E.B., B.O.J., G.A.A., D.O.A., I.J., U.T., P.S., G.T., D.F.G., H.H., K.S.).,Faculty of Medicine (E.F.O., E.B., H.K., T.G., K.A., D.O.A., I.J., U.T., G.T., K.S.).,Department of Medicine, Landspitali University Hospital, Reykjavik, Iceland (K.A., R.D., D.O.A., G.T.)
| | - Daniel F Gudbjartsson
- Adalbjorg Jonasdottir, Aslaug Jonasdottir, E.B., B.O.J., G.A.A., D.O.A., I.J., U.T., P.S., G.T., D.F.G., H.H., K.S.).,School of Engineering and Natural Sciences (G.S., D.F.G.)
| | - Hilma Holm
- Adalbjorg Jonasdottir, Aslaug Jonasdottir, E.B., B.O.J., G.A.A., D.O.A., I.J., U.T., P.S., G.T., D.F.G., H.H., K.S.)
| | - Kari Stefansson
- Adalbjorg Jonasdottir, Aslaug Jonasdottir, E.B., B.O.J., G.A.A., D.O.A., I.J., U.T., P.S., G.T., D.F.G., H.H., K.S.).,Faculty of Medicine (E.F.O., E.B., H.K., T.G., K.A., D.O.A., I.J., U.T., G.T., K.S.)
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10
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Behiry EG, Al-Azzouny MA, Sabry D, Behairy OG, Salem NE. Association of NKX2-5, GATA4, and TBX5 polymorphisms with congenital heart disease in Egyptian children. Mol Genet Genomic Med 2019; 7:e612. [PMID: 30834692 PMCID: PMC6503026 DOI: 10.1002/mgg3.612] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 01/10/2019] [Accepted: 01/24/2019] [Indexed: 01/03/2023] Open
Abstract
Background Several genes encoding transcription factors are known to be the primary cause of congenital heart disease. NKX2‐5 and GATA4 were the first congenital heart disease–causing genes identified by linkage analysis. This study designed to study the association of five single–nucleotide variants of NKX2‐5, GATA4, and TBX5 genes with sporadic nonsyndromic cases of a congenital cardiac septal defect in Egyptian children. Methods Venous blood samples from 150 congenital heart disease children (including a ventricular septal defect, atrial septal defect, tetralogy of Fallot, and patent ductus arteriosus) and 90 apparently healthy of matched age and sex were studied by polymerase chain reaction followed by direct sequencing in order to study two single–nucleotide variants of NKX2‐5 (rs2277923, rs28936670), two single–nucleotide variants of GATA4 (rs368418329, rs56166237) and one single–nucleotide variant TBX5 (rs6489957). The distribution of genotype and allele frequency in the congenital heart diseases (CHD) group and control group were analyzed. Results We found different genotype frequencies of the two variants of NKX2‐5, as CT genotype of rs2277923 was present in 58% and 36% in cases and control respectively, and TT genotype present in 6% of the cases. Also regarding missense variant rs28936670, heterozygous AG presented in 82% of the cases. Also, we observed a five prime UTR variant rs368418329, GT (42% of the cases) and GG (46% of the cases) genotypes showed the most frequent presentation in cases. While regarding a synonymous variant rs56166237, GT and GG were the most presented in cases (41.4%, 56% respectively) in contrast to control group (20%, 1.7% respectively). Also, a synonymous variant in TBX5, the distribution of genotype frequency was significantly different between the CHD group and control group. CT genotype of TBX5 ‐rs6489957 was found in 12 ASD, 24 VSD, six PDA, three aortic coarctation and nine fallot that represent 42% of the cases. Conclusions Significantly higher frequency of different allelle of five variants was observed in cases when compared to the control group, with significant risky effect for the development of septal defect. In addition to two polymorphisms of NKX2‐5 (rs2277923, rs28936670) variant in the cardiac septal defect, two variants in GATA4 (rs368418329, rs56166237) and one variant in TBX5 (rs6489957) seem to have a role in the pathogenesis of congenital heart disease.
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Affiliation(s)
- Eman G Behiry
- Clinical and Chemical Pathology Department, Benha Faculty of Medicine, Benha University, Benha, Egypt
| | - Mahmoud A Al-Azzouny
- Clinical and Chemical Pathology Department, Benha Faculty of Medicine, Benha University, Benha, Egypt
| | - Dina Sabry
- Biochemistry Department, Cairo Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Ola G Behairy
- Pediatrics Department, Benha Faculty of Medicine, Benha University, Benha, Egypt
| | - Nessrine E Salem
- Histology Department, Benha Faculty of Medicine, Benha University, Benha, Egypt
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11
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Genetic Imbalances in Argentinean Patients with Congenital Conotruncal Heart Defects. Genes (Basel) 2018; 9:genes9090454. [PMID: 30208644 PMCID: PMC6162499 DOI: 10.3390/genes9090454] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 08/23/2018] [Accepted: 09/05/2018] [Indexed: 02/07/2023] Open
Abstract
Congenital conotruncal heart defects (CCHD) are a subset of serious congenital heart defects (CHD) of the cardiac outflow tracts or great arteries. Its frequency is estimated in 1/1000 live births, accounting for approximately 10–30% of all CHD cases. Chromosomal abnormalities and copy number variants (CNVs) contribute to the disease risk in patients with syndromic and/or non-syndromic forms. Although largely studied in several populations, their frequencies are barely reported for Latin American countries. The aim of this study was to analyze chromosomal abnormalities, 22q11 deletions, and other genomic imbalances in a group of Argentinean patients with CCHD of unknown etiology. A cohort of 219 patients with isolated CCHD or associated with other major anomalies were referred from different provinces of Argentina. Cytogenetic studies, Multiplex-Ligation-Probe-Amplification (MLPA) and fluorescent in situ hybridization (FISH) analysis were performed. No cytogenetic abnormalities were found. 22q11 deletion was found in 23.5% of the patients from our cohort, 66% only had CHD with no other major anomalies. None of the patients with transposition of the great vessels (TGV) carried the 22q11 deletion. Other 4 clinically relevant CNVs were also observed: a distal low copy repeat (LCR)D-E 22q11 duplication, and 17p13.3, 4q35 and TBX1 deletions. In summary, 25.8% of CCHD patients presented imbalances associated with the disease.
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12
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Khatami M, Mazidi M, Taher S, Heidari MM, Hadadzadeh M. Novel Point Mutations in the NKX2.5 Gene in Pediatric Patients with Non-Familial Congenital Heart Disease. ACTA ACUST UNITED AC 2018; 54:medicina54030046. [PMID: 30344277 PMCID: PMC6122093 DOI: 10.3390/medicina54030046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/06/2018] [Accepted: 06/14/2018] [Indexed: 01/25/2023]
Abstract
Background and objective: Congenital heart disease (CHD) is the most common birth abnormality in the structure or function of the heart that affects approximately 1% of all newborns. Despite its prevalence and clinical importance, the etiology of CHD remains mainly unknown. Somatic and germline mutations in cardiac specific transcription factor genes have been identified as the factors responsible for various forms of CHD, particularly ventricular septal defects (VSDs), tetralogy of Fallot (TOF), and atrial septal defects (ASDs). p. NKX2.5 is a homeodomain protein that controls many of the physiological processes in cardiac development including specification and proliferation of cardiac precursors. The aim of our study was to evaluate the NKX2.5 gene mutations in sporadic pediatric patients with clinical diagnosis of congenital heart malformations. Materials and methods: In this study, we investigated mutations of the NKX2.5 gene’s coding region in 105 Iranian pediatric patients with non-familial CHD by polymerase chain reaction-single stranded conformation polymorphism (PCR-SSCP) and direct sequencing. Results: We observed a total of four mutations, of which, two were novel DNA sequence variants in the coding region of exon 1 (c. 95 A > T and c. 93 A > T) and two others were previously reported as single-nucleotide polymorphisms (SNPs), namely rs72554028 (c. 2357 G > A) and rs3729753 (c. 606 G > C) in exon 2. Further, observed mutations are completely absent in normal healthy individuals (n = 92). Conclusion: These results suggest that NKX2.5 mutations are highly rare in CHD patients. However, in silico analysis proves that c.95 A > T missense mutation in NKX2.5 gene is probably pathogenic and may be contributing to the risk of sporadic CHD in the Iranian population.
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Affiliation(s)
- Mehri Khatami
- Department of Biology, Faculty of Science, Yazd University, Yazd 8915818411, Iran.
| | - Mansoureh Mazidi
- Department of Biology, Faculty of Science, Yazd University, Yazd 8915818411, Iran.
| | - Shabnam Taher
- Department of Biology, Faculty of Science, Yazd University, Yazd 8915818411, Iran.
| | | | - Mehdi Hadadzadeh
- Department of Cardiac Surgery, Afshar Hospital, Shahid Sadoughi University of Medical Sciences, Yazd 8915818411, Iran.
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13
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Chen LT, Yang TB, Wang TT, Zheng Z, Zhao LJ, Ye ZW, Zhang SM, Qin JB. [Association of single nucleotide polymorphisms of transcription factors with congenital heart diseases in the Chinese population: a Meta analysis]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2018; 20:490-496. [PMID: 29972125 PMCID: PMC7389953 DOI: 10.7499/j.issn.1008-8830.2018.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 04/04/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To study the association of single nucleotide polymorphisms (SNPs) of transcription factors (NKX2.5, GATA4, TBX5, and FOG2) with congenital heart disease (CHD) in the Chinese population. METHODS PubMed, Google Scholar, CNKI, Wanfang Data, and Weipu Data were searched for articles on the association of SNPs of target genes with CHD in the Chinese population. If one locus was mentioned in at least two articles, the random or fixed effect model was used to perform a pooled analysis of study results and to calculate the pooled OR and its 95%CI. If a locus was mentioned in only one article, related data were extracted from this article to analyze the association between the SNPs of this locus and CHD. RESULTS Twenty-three articles were included. The Meta analysis showed that there were significant differences between the CHD and control groups in the genotype and allele frequencies of GATA4 rs1139244 and rs867858 and the genotype frequency of GATA4 rs904018, while there were no significant differences in the SNPs of the other genetic loci between the two groups. The single-article analysis showed that there were significant differences between the two groups in the allele frequencies of NKX2.5 rs118026695/rs703752, GATA4 rs884662/rs12825/rs12458/rs3203358/rs4841588, and TBX5 rs6489956. There were no significant differences in the SNPs of FOG2 locus between the two groups. CONCLUSIONS The SNPs of some loci in NKX2.5, GATA4, and TBX5 are associated with CHD in the Chinese population, but the association between the SNPs of FOG2 locus and the development of CHD has not been found yet.
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Affiliation(s)
- Le-Tao Chen
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha 410078, China (Qin J-B,
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14
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Thomford NE, Dzobo K, Yao NA, Chimusa E, Evans J, Okai E, Kruszka P, Muenke M, Awandare G, Wonkam A, Dandara C. Genomics and Epigenomics of Congenital Heart Defects: Expert Review and Lessons Learned in Africa. OMICS : A JOURNAL OF INTEGRATIVE BIOLOGY 2018; 22:301-321. [PMID: 29762087 PMCID: PMC6016577 DOI: 10.1089/omi.2018.0033] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Congenital heart defects (CHD) are structural malformations found at birth with a prevalence of 1%. The clinical trajectory of CHD is highly variable and thus in need of robust diagnostics and therapeutics. Major surgical interventions are often required for most CHDs. In Africa, despite advances in life sciences infrastructure and improving education of medical scholars, the limited clinical data suggest that CHD detection and correction are still not at par with the rest of the world. But the toll and genetics of CHDs in Africa has seldom been systematically investigated. We present an expert review on CHD with lessons learned on Africa. We found variable CHD phenotype prevalence in Africa across countries and populations. There are important gaps and paucity in genomic studies of CHD in African populations. Among the available genomic studies, the key findings in Africa were variants in GATA4 (P193H), MTHFR 677TT, and MTHFR 1298CC that were associated with atrial septal defect, ventricular septal defect (VSD), Tetralogy of Fallot (TOF), and patent ductus arteriosus phenotypes and 22q.11 deletion, which is associated with TOF. There were no data on epigenomic association of CHD in Africa, however, other studies have shown an altered expression of miR-421 and miR-1233-3p to be associated with TOF and hypermethylation of CpG islands in the promoter of SCO2 gene also been associated with TOF and VSD in children with non-syndromic CHD. These findings signal the urgent need to develop and implement genetic and genomic research on CHD to identify the hereditary and genome-environment interactions contributing to CHD. These projected studies would also offer comparisons on CHD pathophysiology between African and other populations worldwide. Genomic research on CHD in Africa should be developed in parallel with next generation technology policy research and responsible innovation frameworks that examine the social and political factors that shape the emergence and societal embedding of new technologies.
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Affiliation(s)
- Nicholas Ekow Thomford
- 1 Division of Human Genetics, Department of Pathology, Faculty of Health Sciences, Institute for Infectious Disease and Molecular Medicine, University of Cape Town , Cape Town, South Africa
- 2 School of Medical Sciences, University of Cape Coast , Cape Coast, Ghana
| | - Kevin Dzobo
- 3 ICGEB, Cape Town Component, University of Cape Town , Cape Town, South Africa
- 4 Division of Medical Biochemistry, IIDMM, Department of IBM, Faculty of Health Sciences, University of Cape Town , Cape Town, South Africa
| | - Nana Akyaa Yao
- 5 National Cardiothoracic Centre, Korle Bu Teaching Hospital , Accra, Ghana
- 6 University of Ghana Medical School, University of Ghana , Accra, Ghana
| | - Emile Chimusa
- 1 Division of Human Genetics, Department of Pathology, Faculty of Health Sciences, Institute for Infectious Disease and Molecular Medicine, University of Cape Town , Cape Town, South Africa
| | - Jonathan Evans
- 1 Division of Human Genetics, Department of Pathology, Faculty of Health Sciences, Institute for Infectious Disease and Molecular Medicine, University of Cape Town , Cape Town, South Africa
| | - Emmanuel Okai
- 2 School of Medical Sciences, University of Cape Coast , Cape Coast, Ghana
- 7 Cape Coast Teaching Hospital , Cape Coast, Ghana
| | - Paul Kruszka
- 8 National Human Genome Research Institute, Medical Genetics Branch, National Institutes of Health , Bethesda, Maryland, USA
| | - Maximilian Muenke
- 8 National Human Genome Research Institute, Medical Genetics Branch, National Institutes of Health , Bethesda, Maryland, USA
| | - Gordon Awandare
- 9 Department of Biochemistry, WACCBIP, University of Ghana , Legon, Accra, Ghana
| | - Ambroise Wonkam
- 1 Division of Human Genetics, Department of Pathology, Faculty of Health Sciences, Institute for Infectious Disease and Molecular Medicine, University of Cape Town , Cape Town, South Africa
| | - Collet Dandara
- 1 Division of Human Genetics, Department of Pathology, Faculty of Health Sciences, Institute for Infectious Disease and Molecular Medicine, University of Cape Town , Cape Town, South Africa
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15
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Xu YJ, Di RM, Qiao Q, Li XM, Huang RT, Xue S, Liu XY, Wang J, Yang YQ. GATA6 loss-of-function mutation contributes to congenital bicuspid aortic valve. Gene 2018; 663:115-120. [PMID: 29653232 DOI: 10.1016/j.gene.2018.04.018] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/24/2018] [Accepted: 04/09/2018] [Indexed: 12/20/2022]
Abstract
Congenital bicuspid aortic valve (BAV), the most common form of birth defect in humans, is associated with substantial morbidity and mortality. Increasing evidence demonstrates that genetic risk factors play a key role in the pathogenesis of BAV. However, BAV is a genetically heterogeneous disease and the genetic determinants underpinning BAV in an overwhelming majority of patients remain unknown. In the present study, the coding exons and flanking introns of the GATA6 gene, which encodes a zinc-finger transcription factor essential for the normal development of the aortic valves, were sequenced in 152 unrelated patients with congenital BAV. The available relatives of a proband harboring an identified GATA6 mutation and 200 unrelated, ethnically matched healthy individuals used as controls were also genotyped for GATA6. The functional characteristics of the mutation were analyzed by using a dual-luciferase reporter assay system. As a result, a novel heterozygous GATA6 mutation, p.E386X, was identified in a family with BAV transmitted in an autosomal dominant mode. The nonsense mutation was absent in 400 control chromosomes. Biological assays revealed that the mutant GATA6 protein had no transcriptional activity compared with its wild-type counterpart. Furthermore, the mutation disrupted the synergistic transcriptional activation between GATA6 and GATA4, another transcription factor causally linked to BAV. In conclusion, this study firstly associates GATA6 loss-of-function mutation with enhanced susceptibility to familial BAV, which provides novel insight into the molecular mechanism of BAV, implying potential implications for genetic counseling and personalized management of BAV patients.
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Affiliation(s)
- Ying-Jia Xu
- Department of Cardiology, The Fifth People's Hospital of Shanghai, Fudan University, 801 Heqing Road, Shanghai 200240, PR China
| | - Ruo-Min Di
- Department of Cardiology, The Fifth People's Hospital of Shanghai, Fudan University, 801 Heqing Road, Shanghai 200240, PR China
| | - Qi Qiao
- Department of Cardiology, The Fifth People's Hospital of Shanghai, Fudan University, 801 Heqing Road, Shanghai 200240, PR China
| | - Xiu-Mei Li
- Department of Cardiology, The Fifth People's Hospital of Shanghai, Fudan University, 801 Heqing Road, Shanghai 200240, PR China
| | - Ri-Tai Huang
- Department of Cardiovascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 1630 Dongfang Road, Shanghai 200127, PR China
| | - Song Xue
- Department of Cardiovascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 1630 Dongfang Road, Shanghai 200127, PR China
| | - Xing-Yuan Liu
- Department of Pediatrics, Tongji Hospital, Tongji University, 389 Xincun Road, Shanghai 200065, PR China
| | - Juan Wang
- Department of Cardiovascular Medicine, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, PR China
| | - Yi-Qing Yang
- Department of Cardiology, The Fifth People's Hospital of Shanghai, Fudan University, 801 Heqing Road, Shanghai 200240, PR China; Department of Cardiovascular Research Laboratory, The Fifth People's Hospital of Shanghai, Fudan University, 801 Heqing Road, Shanghai 200240, PR China; Department of Central Laboratory, The Fifth People's Hospital of Shanghai, Fudan University, 801 Heqing Road, Shanghai 200240, PR China.
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16
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Lu CX, Wang W, Wang Q, Liu XY, Yang YQ. A Novel MEF2C Loss-of-Function Mutation Associated with Congenital Double Outlet Right Ventricle. Pediatr Cardiol 2018; 39:794-804. [PMID: 29468350 DOI: 10.1007/s00246-018-1822-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 01/20/2018] [Indexed: 02/07/2023]
Abstract
Congenital heart defect (CHD) represents the most prevalent birth defect, and accounts for substantial morbidity and mortality in humans. Aggregating evidence demonstrates the genetic basis for CHD. However, CHD is a heterogeneous disease, and the genetic determinants underlying CHD in most patients remain unknown. In the present study, a cohort of 186 unrelated cases with CHD and 300 unrelated control individuals were recruited. The coding exons and flanking introns of the MEF2C gene, which encodes a transcription factor crucial for proper cardiovascular development, were sequenced in all study participants. The functional effect of an identified MEF2C mutation was characterized using a dual-luciferase reporter assay system. As a result, a novel heterozygous MEF2C mutation, p.R15C, was detected in an index patient with congenital double outlet right ventricle (DORV) as well as ventricular septal defect. Analysis of the proband's pedigree showed that the mutation co-segregated with CHD with complete penetrance. The missense mutation, which changed the evolutionarily conserved amino acid, was absent in 300 control individuals. Functional deciphers revealed that the mutant MEF2C protein had a significantly decreased transcriptional activity. Furthermore, the mutation significantly reduced the synergistic activation between MEF2C and GATA4, another transcription factor linked to CHD. This study firstly associates MEF2C loss-of-function mutation with DORV in humans, which provides novel insight into the molecular pathogenesis of CHD, suggesting potential implications for genetic counseling and personalized treatment of CHD patients.
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Affiliation(s)
- Cai-Xia Lu
- Department of Pediatrics, Huashan Hospital North, Fudan University, Shanghai, 201907, China
| | - Wei Wang
- Department of Parasitology, School of Basic Medical Science, Anhui Medical University, Hefei, 230032, Anhui, China
| | - Qian Wang
- Department of Pediatrics, Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China
| | - Xing-Yuan Liu
- Department of Pediatrics, Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China.
| | - Yi-Qing Yang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, 200030, China. .,Department of Cardiovascular Research Laboratory, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, 200030, China. .,Department of Central Laboratory, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, 200030, China.
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17
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Abstract
Atrial septal defect is one of the most common CHD. The pathogenesis of atrial septal defect still remains unknown. Cx43 is the most prevalent connexin in the mammalian heart during development. Its genetic variants can cause several CHD. The aim of our study was to investigate the association of genetic variations of the Cx43 with sporadic atrial septal defect. A total of 450 paediatric patients were recruited, including 150 cases with atrial septal defect and 300 healthy controls. The promoter region of Cx43 was analysed by sequencing after polymerase chain reaction. All data were analysed by using the Statistic Package for Social Science 19.0 software. The frequency of the single nucleotide polymorphism rs2071166 was significantly higher in atrial septal defect cases than in healthy controls. The CC genotype at rs2071166 site in Cx43 was correlated with an increased risk for atrial septal defect (p<0.0001, odds ratio=3.891, 95% confidence interval 1.948-7.772) and the C allele was positively correlated with atrial septal defect (p=0.007, odds ratio=1.567, 95% confidence interval 1.129-2.175). In conclusion, our results confirmed that rs2071166 in Cx43 may be relevant with an increased atrial septal defect risk.
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18
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Qiao XH, Wang Q, Wang J, Liu XY, Xu YJ, Huang RT, Xue S, Li YJ, Zhang M, Qu XK, Li RG, Qiu XB, Yang YQ. A novel NR2F2 loss-of-function mutation predisposes to congenital heart defect. Eur J Med Genet 2017; 61:197-203. [PMID: 29222010 DOI: 10.1016/j.ejmg.2017.12.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 11/06/2017] [Accepted: 12/04/2017] [Indexed: 02/06/2023]
Abstract
Congenital heart defect (CHD) is the most common type of birth defect in humans and a leading cause of infant morbidity and mortality. Previous studies have demonstrated that genetic defects play a pivotal role in the pathogenesis of CHD. However, the genetic basis of CHD remains poorly understood due to substantial genetic heterogeneity. In this study, the coding exons and splicing boundaries of the NR2F2 gene, which encodes a pleiotropic transcription factor required for normal cardiovascular development, were sequenced in 168 unrelated patients with CHD, and a novel mutation (c.247G > T, equivalent to p.G83X) was detected in a patient with double outlet right ventricle as well as ventricular septal defect. Genetic scanning of the mutation carrier's relatives available showed that the mutation was present in all affected family members but absent in unaffected family members. Analysis of the index patient's pedigree displayed that the mutation co-segregated with CHD, which was transmitted as an autosomal dominant trait with complete penetrance. The nonsense mutation was absent in 230 unrelated, ethnically-matched healthy individuals used as controls. Functional deciphers by using a dual-luciferase reporter assay system revealed that the mutant NR2F2 protein had no transcriptional activity as compared with its wild-type counterpart. Furthermore, the mutation abrogated the synergistic transcriptional activation between NR2F2 and GATA4, another core cardiac transcription factor associated with CHD. This study firstly associates NR2F2 loss-of-function mutation with an increased susceptibility to double outlet right ventricle in humans, which provides further significant insight into the molecular mechanisms underpinning CHD, suggesting potential implications for genetic counseling of CHD families and personalized treatment of CHD patients.
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Affiliation(s)
- Xiao-Hui Qiao
- Department of Pediatrics, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Qian Wang
- Department of Pediatrics, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Juan Wang
- Department of Cardiovascular Medicine, East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xing-Yuan Liu
- Department of Pediatrics, Tongji Hospital, Tongji University School of Medicine, Shanghai, China.
| | - Ying-Jia Xu
- Department of Cardiology, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Ri-Tai Huang
- Department of Cardiovascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Song Xue
- Department of Cardiovascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yan-Jie Li
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Min Zhang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xin-Kai Qu
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Ruo-Gu Li
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xing-Biao Qiu
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yi-Qing Yang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China; Department of Cardiovascular Research Laboratory, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China.
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19
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Zhang M, Li FX, Liu XY, Hou JY, Ni SH, Wang J, Zhao CM, Zhang W, Kong Y, Huang RT, Xue S, Yang YQ. TBX1 loss-of-function mutation contributes to congenital conotruncal defects. Exp Ther Med 2017; 15:447-453. [PMID: 29250159 DOI: 10.3892/etm.2017.5362] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Accepted: 09/07/2017] [Indexed: 12/15/2022] Open
Abstract
Conotruncal defects (CTDs) account for ~30% of all types of congenital heart disease and contribute to increased morbidity and mortality rates. Increasing evidence suggests that genetic risk factors are involved in the pathogenesis of CTDs. Mutations in a number of genes, including the TBX1 gene that codes for a T-box transcription factor essential for normal cardiovascular development, may contribute to the development of CTD. CTDs are genetically heterogeneous and the genetic defects responsible for CTDs in the majority of patients remain unknown. The present study sequenced the coding regions and splicing junction boundaries of TBX1 in 136 patients with CTDs and 300 matched healthy individuals. The disease-causing potential of the identified TBX1 sequence variation was evaluated using MutationTaster, PolyPhen-2, SIFT and PROVEN software. The functional characteristics of the mutant TBX1 gene were defined using a dual-luciferase reporter assay system. A novel heterozygous TBX1 mutation, p.S233Y, was identified in a patient with transposition of the great arteries (TGA) and a ventricular septal defect. This mutation was absent in the 300 controls and altered the amino acid produced, serine, which is evolutionarily conserved across several species, and was predicted to be pathogenic in silico. Luciferase assays conducted in COS-7 cells demonstrated that the newly identified TBX1 mutation was associated with significantly diminished transcriptional activation of the ANF promoter compared with the wild-type TBX1. To the best of our knowledge, the present study is the first to associate a TBX1 loss-of-function mutation with enhanced susceptibility to TGA, which adds significant insight to the molecular mechanism of TGA.
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Affiliation(s)
- Min Zhang
- Department of Pediatrics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Fu-Xing Li
- Department of Pediatrics, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Xing-Yuan Liu
- Department of Pediatrics, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Jing-Yi Hou
- Department of Pediatrics, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Shi-Hong Ni
- Department of Pediatrics, Baoshan Branch of Huashan Hospital, Fudan University, Shanghai 200431, P.R. China
| | - Juan Wang
- Department of Cardiology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Cui-Mei Zhao
- Department of Cardiology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Wei Zhang
- Department of Cardiac Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, P.R. China
| | - Ye Kong
- Department of Cardiac Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, P.R. China
| | - Ri-Tai Huang
- Department of Cardiovascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, P.R. China
| | - Song Xue
- Department of Cardiovascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, P.R. China
| | - Yi-Qing Yang
- Department of Cardiovascular Research Laboratory, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, P.R. China
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Qiao XH, Wang F, Zhang XL, Huang RT, Xue S, Wang J, Qiu XB, Liu XY, Yang YQ. MEF2C loss-of-function mutation contributes to congenital heart defects. Int J Med Sci 2017; 14:1143-1153. [PMID: 29104469 PMCID: PMC5666546 DOI: 10.7150/ijms.21353] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 08/22/2017] [Indexed: 12/19/2022] Open
Abstract
Congenital heart disease (CHD) is the most common type of developmental abnormality in humans, and is a leading cause for substantially increased morbidity and mortality in affected individuals. Increasing studies demonstrates a pivotal role of genetic defects in the pathogenesis of CHD, and presently mutations in more than 60 genes have been associated with CHD. Nevertheless, CHD is of pronounced genetic heterogeneity, and the genetic basis underpinning CHD in a large proportion of patients remains unclear. In the present study, the whole coding exons and splicing donors/acceptors of the MEF2C gene, which codes for a transcription factor essential for normal cardiovascular development, were sequenced in 200 unrelated patients affected with CHD, and a novel heterozygous missense mutation, p.L38P, was identified in an index patient with patent ductus arteriosus (PDA) and ventricular septal defect (VSD). Genetic scan of the mutation carrier's family members available showed that the mutation was present in all affected family members but absent in unaffected family members. Analysis of the proband's pedigree revealed that the mutation co-segregated with PDA, which was transmitted as an autosomal dominant trait with complete penetrance. The mutation changed the amino acid that was completely conserved evolutionarily, and did not exist in 300 unrelated, ethnically-matched healthy individuals used as controls. Functional deciphers by using a dual-luciferase reporter assay system unveiled that the mutant MEF2C protein had a significantly reduced transcriptional activity. Furthermore, the mutation significantly diminished the synergistic activation between MEF2C and GATA4, another cardiac core transcription factor that has been causally linked to CHD. In conclusion, this is the first report on the association of a MEF2C loss-of-function mutation with an increased vulnerability to CHD in humans, which provides novel insight into the molecular mechanisms underlying CHD, implying potential implications for early diagnosis and timely prophylaxis of CHD.
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Affiliation(s)
- Xiao-Hui Qiao
- Department of Pediatric Internal Medicine, Ningbo Women & Children's Hospital, 339 Liuding Street, Ningbo 315012, China
| | - Fei Wang
- Department of Neurosurgery, Tongji Hospital, Tongji University School of Medicine, 389 Xincun Road, Shanghai 200065, China
| | - Xian-Ling Zhang
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Middle Yanchang Road, Shanghai 200072, China
| | - Ri-Tai Huang
- Department of Cardiovascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 1630 Dongfang Road, Shanghai 200127, China
| | - Song Xue
- Department of Cardiovascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 1630 Dongfang Road, Shanghai 200127, China
| | - Juan Wang
- Department of Cardiovascular Medicine, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Xing-Biao Qiu
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
| | - Xing-Yuan Liu
- Department of Pediatrics, Tongji Hospital, Tongji University School of Medicine, 389 Xincun Road, Shanghai 200065, China
| | - Yi-Qing Yang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
- Department of Cardiovascular Research Laboratory, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
- Department of Central Laboratory, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
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Zhang M, Li FX, Liu XY, Huang RT, Xue S, Yang XX, Li YJ, Liu H, Shi HY, Pan X, Qiu XB, Yang YQ. MESP1 loss-of-function mutation contributes to double outlet right ventricle. Mol Med Rep 2017; 16:2747-2754. [DOI: 10.3892/mmr.2017.6875] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Accepted: 03/30/2017] [Indexed: 11/06/2022] Open
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22
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Huang RT, Wang J, Xue S, Qiu XB, Shi HY, Li RG, Qu XK, Yang XX, Liu H, Li N, Li YJ, Xu YJ, Yang YQ. TBX20 loss-of-function mutation responsible for familial tetralogy of Fallot or sporadic persistent truncus arteriosus. Int J Med Sci 2017; 14:323-332. [PMID: 28553164 PMCID: PMC5436474 DOI: 10.7150/ijms.17834] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 12/20/2016] [Indexed: 12/19/2022] Open
Abstract
Congenital heart disease (CHD), the most common form of developmental abnormality in humans, remains a leading cause of morbidity and mortality in neonates. Genetic defects have been recognized as the predominant causes of CHD. Nevertheless, CHD is of substantial genetic heterogeneity and the genetic defects underlying CHD in most cases remain unclear. In the current study, the coding regions and splicing junction sites of the TBX20 gene, which encodes a T-box transcription factor key to cardiovascular morphogenesis, were sequenced in 175 unrelated patients with CHD, and a novel heterozygous TBX20 mutation, p.K274X, was identified in an index patient with tetralogy of Fallot (TOF). Genetic analysis of the proband's available family members showed that his father, elder brother and son had also TOF. In addition, his father and elder brother had also atrial septal defect, and his niece had persistent truncus arteriosus and ventricular septal defect. Analysis of the pedigree revealed that the mutation co-segregated with CHD transmitted in an autosomal dominant fashion, with complete penetrance. The nonsense mutation, which was absent in the 800 control chromosomes, was predicted to produce a truncated protein with only the amino terminus and partial T-box domain left. Functional analyses by using a dual-luciferase reporter assay system showed that the mutant TBX20 lost the ability to transactivate the target gene ANF. Furthermore, the mutation reduced the synergistic activation between TBX20 and NKX2.5 as well as GATA4, two other transcriptional factors previously associated with various CHD, encompassing TOF. This study firstly links TBX20 loss-of-function mutation to familial TOF or sporadic persistent truncus arteriosus, providing novel insight into the molecular pathogenesis of CHD.
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Affiliation(s)
- Ri-Tai Huang
- Department of Cardiovascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 1630 Dongfang Road, Shanghai 200127, China
| | - Juan Wang
- Department of Cardiovascular Medicine, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Song Xue
- Department of Cardiovascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 1630 Dongfang Road, Shanghai 200127, China
| | - Xing-Biao Qiu
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
| | - Hong-Yu Shi
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
| | - Ruo-Gu Li
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
| | - Xin-Kai Qu
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
| | - Xiao-Xiao Yang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
| | - Hua Liu
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
| | - Ning Li
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
| | - Yan-Jie Li
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
| | - Ying-Jia Xu
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
| | - Yi-Qing Yang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
- Department of Cardiovascular Research Laboratory, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
- Department of Central Laboratory, Shanghai Chest Hospital, Shanghai Jiao Tong University, 241 West Huaihai Road, Shanghai 200030, China
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Abstract
As the most prevalent form of birth defect in humans worldwide, congenital heart disease (CHD) is responsible for substantial morbidity and is still the leading cause of birth defect-related demises. Increasing evidence demonstrates that genetic defects play an important role in the pathogenesis of CHD, and mutations in multiple genes, especially in those coding for cardiac core transcription factors, have been causally linked to various CHDs. Nevertheless, CHD is a genetically heterogeneous disease and the genetic determinants underpinning CHD in an overwhelming majority of patients remain elusive. In the current study, genomic DNA was extracted from venous blood samples of 165 unrelated patients with CHD, and the coding exons and splicing junction sites of the HAND1 gene, which encodes a basic helix-loop-helix transcription factor essential for cardiovascular development, were sequenced. As a result, a novel heterozygous mutation, p.R118C, was identified in a patient with tetralogy of Fallot (TOF). The missense mutation, which was absent in 600 referential chromosomes, altered the amino acid that was completely conserved evolutionarily. Biological assays with a dual-luciferase reporter assay system revealed that the R118C-mutant HAND1 protein had significantly reduced transcriptional activity when compared with its wild-type counterpart. Furthermore, the mutation significantly decreased the synergistic activation of a downstream target gene between HAND1 and GATA4, another cardiac core transcription factor associated with TOF. To our knowledge, this is the first report on the association of a HAND1 loss-of-function mutation with enhanced susceptibility to TOF in humans. The findings provide novel insight into the molecular etiology underlying TOF, suggesting potential implications for the improved prophylactic and therapeutic strategies for TOF.
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Li L, Wang J, Liu XY, Liu H, Shi HY, Yang XX, Li N, Li YJ, Huang RT, Xue S, Qiu XB, Yang YQ. HAND1 loss-of-function mutation contributes to congenital double outlet right ventricle. Int J Mol Med 2017; 39:711-718. [DOI: 10.3892/ijmm.2017.2865] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 01/05/2017] [Indexed: 11/06/2022] Open
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25
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NKX2-5 molecular screening and assessment of variant rate and risk factors of secundum atrial septal defect in a Moroccan population. Anatol J Cardiol 2016; 17:217-223. [PMID: 27752029 PMCID: PMC5864982 DOI: 10.14744/anatoljcardiol.2016.7222] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVE Secundum atrial septal defect (ASDII) has multifactorial etiology that is combination of environmental (e.g., mother's exposure to toxicity, ethnicity) and genetic causes. Aim of the present study was to screen a Moroccan population with ASDII for NKX2-5 variants and to assess risk factors that may contribute to emergence of the disorder. METHODS Thirty-two non-syndromic ASDII patients were screened for NKX2-5 variants using direct sequencing of polymerase chain reactionamplified coding regions. Risk factor rates were compared to general population and assessed using Fisher's exact and chi-square tests. In this retrospective study, criteria of exclusion were suggestive or confirmed syndrome association. RESULTS Three heterozygous variants were detected in 4 patients. NKX2-5 variant rate in present cohort is estimated to be about 9.4%. Two prominent risk factors in the Moroccan population were highlighted: consanguinity, rate of which was significantly high at 30.8%, and previous maternal miscarriage or sibling sudden death, observed in 34.6% of cohort. CONCLUSION Impact of identified variants was discussed and possible disease-predisposing effect is suggested. Findings indicate that ASD may be favored by consanguineous marriage and that NKX2-5 variant rate in ASD patients may be affected by ethnicity. High level of maternal miscarriage and sibling sudden death suggests potential non-sporadic nature as result of putative genetic defect.
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26
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CASZ1 loss-of-function mutation associated with congenital heart disease. Gene 2016; 595:62-68. [PMID: 27693370 DOI: 10.1016/j.gene.2016.09.044] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 09/21/2016] [Accepted: 09/27/2016] [Indexed: 11/23/2022]
Abstract
As the most common form of birth defect in humans, congenital heart disease (CHD) is associated with substantial morbidity and mortality in both children and adults. Increasing evidence demonstrates that genetic defects play a pivotal role in the pathogenesis of CHD. However, CHD is of great heterogeneity, and in an overwhelming majority of cases, the genetic determinants underpinning CHD remain elusive. In the present investigation, the coding exons and flanking introns of the CASZ1 gene, which codes for a zinc finger transcription factor essential for the cardiovascular morphogenesis, were sequenced in 172 unrelated patients with CHD. As a result, a novel heterozygous CASZ1 mutation, p.L38P, was identified in an index patient with congenital ventricular septal defect (VSD). Genetic scanning of the mutation carrier's available family members revealed that the mutation was present in all affected patients but absent in unaffected individuals. Analysis of the proband's pedigree showed that the mutation co-segregated with VSD, which was transmitted as an autosomal dominant trait with complete penetrance. The missense mutation, which altered the amino acid that was highly conserved evolutionarily, was absent in 200 unrelated, ethnically-matched healthy subjects used as controls. Functional deciphers by using a dual-luciferase reporter assay system unveiled that the mutant CASZ1 had significantly reduced transcriptional activity as compared with its wild-type counterpart. To the best of our knowledge, the current study firstly identifies CASZ1 as a new gene predisposing to CHD in humans, which provides novel insight into the molecular mechanisms underlying CHD and a potential therapeutic target for CASZ1-associated CHD, suggesting potential implications for personalized prophylaxis and therapy of CHD.
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27
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Xie X, Shi X, Xun X, Rao L. Associations of NKX2-5 Genetic Polymorphisms with the Risk of Congenital Heart Disease: A Meta-analysis. Pediatr Cardiol 2016; 37:953-61. [PMID: 27033241 DOI: 10.1007/s00246-016-1377-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 03/21/2016] [Indexed: 01/24/2023]
Abstract
The NKX2-5 gene is a vital regulator of cardiac formation and development. Recently, the roles of NKX2-5 63A>G polymorphism and 606G>C polymorphism in congenital heart disease (CHD) have been extensively studied, with conflicting results. The aim of the present study was to better elucidate the associations between NKX2-5 genetic polymorphisms and CHD risk through a meta-analysis. Eligible articles were searched in PubMed, MEDLINE, EMBASE, Google Scholar and CNKI up to December 2015. Odds ratios (ORs) and 95 % confidence intervals were used to detect any potential associations between NKX2-5 genetic polymorphisms and CHD risk. Heterogeneity between studies was assessed with Q test and I (2) statistic. Subgroup analysis and sensitivity analysis were performed to test the reliability and stability of the results, and funnel plots were applied to estimate publication bias. A total of 13 case-control studies including 2245 CHD patients and 1953 healthy controls were analyzed. The overall meta-analysis results showed that NKX2-5 63A>G polymorphism and 606G>C polymorphism were not significantly associated with CHD risk. Subgroup analysis was further performed for NKX2-5 63A>G polymorphism based on types of CHD and ethnicity of study population, and similar negative results were found in all subgroups. Our findings suggested that NKX2-5 63A>G polymorphism and 606G>C polymorphism may not be implicated in the pathogenesis of CHD.
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Affiliation(s)
- Xiaochuan Xie
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xiaohan Shi
- Division of Reproductive Medical Center, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xiaoshuang Xun
- West China School of Public Health, Sichuan University, Chengdu, Sichuan, China
| | - Li Rao
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
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