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Lahm H, Dzilic E, Neb I, Doppler SA, Schneider S, Lange R, Krane M, Dreßen M. Correction of a deleterious TBX5 mutation in an induced pluripotent stem cell line (DHMi004-A-1) using a completely plasmid-free CRISPR/Cas 9 approach. Stem Cell Res 2023; 70:103126. [PMID: 37253295 DOI: 10.1016/j.scr.2023.103126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 04/17/2023] [Accepted: 05/16/2023] [Indexed: 06/01/2023] Open
Abstract
TBX5 is a transcription factor which plays an essential role at different checkpoints during cardiac differentiation. However, regulatory pathways affected by TBX5 still remain ill-defined. We have applied the CRISPR/Cas9 technology using a completely plasmid-free approach to correct a heterozygous causative "loss-of function" TBX5 mutation in an iPSC line (DHMi004-A), that has been established from a patient suffering from Holt-Oram syndrome (HOS). This isogenic iPSC line, DHMi004-A-1, represents a powerful in vitro tool to dissect the regulatory pathways affected by TBX5 in HOS.
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Affiliation(s)
- Harald Lahm
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany.
| | - Elda Dzilic
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - Irina Neb
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - Stefanie A Doppler
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - Stephanie Schneider
- Laboratory for Leukemia Diagnostics, Department of Medicine III, University Hospital, LMU Munich, Germany
| | - Rüdiger Lange
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany; DZHK (German Center for Cardiovascular Research) - partner site Munich Heart Alliance, Munich, Germany
| | - Markus Krane
- DZHK (German Center for Cardiovascular Research) - partner site Munich Heart Alliance, Munich, Germany; Division of Cardiac Surgery, Yale University School of Medicine, New Haven, CT, USA
| | - Martina Dreßen
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany.
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Lahm H, Stieglbauer S, Neb I, Doppler S, Schneider S, Dzilic E, Lange R, Krane M, Dreßen M. Generation of three CRISPR/Cas9 edited human induced pluripotent stem cell lines (DHMi005-A-5, DHMi005-A-6 and DHMi005-A-7) carrying a Holt-Oram Syndrome patient-specific TBX5 mutation with known cardiac phenotype and a FLAG-tag after exon 9 of the TBX5 gene. Stem Cell Res 2023; 69:103123. [PMID: 37210946 DOI: 10.1016/j.scr.2023.103123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/24/2023] [Accepted: 05/11/2023] [Indexed: 05/23/2023] Open
Abstract
TBX5 is a transcription factor (TF) playing essential role during cardiogenesis. It is well known that TF mutations possibly result in non- or additional binding of the DNA due to conformational changes of the protein. We introduced a Holt-Oram Syndrome (HOS) patient-specific TBX5 mutation c.920_C > A heterozygously in a healthy induced pluripotent stell cell (iPSC) line. This TBX5 mutation results in conformational changes of the protein and displayed ventricular septal defects in the patient itself. Additionally we introduced a FLAG-tag on the TBX5 mutation-carrying allele. The resulting heterozygous TBX5-FLAG iPSC lines are a powerful tool to investigate altered TF activity bonding.
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Affiliation(s)
- H Lahm
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany.
| | - S Stieglbauer
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany; Hochschule München University of Applied Sciences, Munich, Germany
| | - I Neb
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - S Doppler
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - S Schneider
- Laboratory for Leukemia Diagnostics, Department of Medicine III, University Hospital, LMU Munich, Germany
| | - E Dzilic
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - R Lange
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany; DZHK (German Center for Cardiovascular Research) - Partner Site Munich Heart Alliance, Munich, Germany
| | - M Krane
- DZHK (German Center for Cardiovascular Research) - Partner Site Munich Heart Alliance, Munich, Germany; Division of Cardiac Surgery, Yale University School of Medicine, New Haven, CT, USA
| | - M Dreßen
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany.
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Li X, Shi W, Ding X, Li J, Li Y, Wu J, Yuan Z, Nong T, Xu H, Zhu M. Identification of a novel TBX5 mutation in a Chinese family with rare symptoms of Holt–Oram syndrome. Heliyon 2022; 8:e11774. [DOI: 10.1016/j.heliyon.2022.e11774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 06/08/2022] [Accepted: 10/11/2022] [Indexed: 11/22/2022] Open
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Lahm H, Heinrich P, Zierler E, Dzilic E, Neb I, Luzius T, Doppler SA, Schneider S, Lange R, Krane M, Dreßen M. Generation of a CRISPR/Cas edited human induced pluripotent stem cell line DHMi005-A-1 carrying a patient-specific disease-causing point mutation in the TBX5 gene. Stem Cell Res 2022; 60:102691. [PMID: 35121196 DOI: 10.1016/j.scr.2022.102691] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 01/23/2022] [Indexed: 10/19/2022] Open
Abstract
A number of mutations in the human TBX5 gene have been described which cause Holt-Oram syndrome, a severe congenital disease associated with abnormalities in heart and upper limb development. We have used a prime-editing approach to introduce a patient-specific disease-causing TBX5 mutation (c.920_C > A) into an induced pluripotent stem cell (iPSC) line from a healthy donor. The resulting iPSC line provides a powerful tool to identify and analyze the biological and molecular impact of this specific TBX5 mutation in comparison to the isogenic control iPSC line during cardiac development.
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Affiliation(s)
- Harald Lahm
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany.
| | - Paul Heinrich
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - Elisabeth Zierler
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - Elda Dzilic
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - Irina Neb
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - Tatjana Luzius
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - Stefanie A Doppler
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - Stephanie Schneider
- Laboratory for Leukemia Diagnostics, Department of Medicine III, University Hospital, LMU Munich, Germany
| | - Rüdiger Lange
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany; DZHK (German Center for Cardiovascular Research) - Partner Site Munich Heart Alliance, Munich, Germany
| | - Markus Krane
- DZHK (German Center for Cardiovascular Research) - Partner Site Munich Heart Alliance, Munich, Germany; Division of Cardiac Surgery, Yale University School of Medicine, New Haven, CT, United States
| | - Martina Dreßen
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
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Dreßen M, Lahm H, Neb I, Luzius T, Doppler SA, Schneider S, Dzilic E, Lange R, Krane M. Establishment of a patient-specific induced pluripotent stem cell line DHMi004-A from a male Holt-Oram syndrome patient with verified TBX5 mutation. Stem Cell Res 2021; 58:102617. [PMID: 34894535 DOI: 10.1016/j.scr.2021.102617] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 12/01/2021] [Accepted: 12/05/2021] [Indexed: 11/27/2022] Open
Abstract
The Holt-Oram syndrome (HOS) is a rare autosomal dominant disorder, mostly based on mutations in the TBX5 gene. Patients show malformation of at least one upper limb along with congenital heart defects. The established induced pluripotent stem cell (iPSC) line was generated from a patient displaying pronounced and typical features of HOS and carrying a single-nucleotide change c.920_C>A leading to an amino acid change from proline to threonine at amino acid position 85, which appeared de novo. Adipose fibroblasts from the patient were reprogrammed using Sendai virus. Pluripotency of the iPSCs was fully demonstrated.
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Affiliation(s)
- M Dreßen
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany.
| | - H Lahm
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - I Neb
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - T Luzius
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - S A Doppler
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - S Schneider
- Laboratory for Leukemia Diagnostics, Department of Medicine III, University Hospital, LMU Munich, Germany
| | - E Dzilic
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany
| | - R Lange
- Technical University of Munich, School of Medicine & Health, Department of Cardiovascular Surgery, Institute Insure, German Heart Center Munich, Lazarettstrasse 36, 80636 Munich, Germany; DZHK (German Center for Cardiovascular Research) - Partner Site Munich Heart Alliance, Munich, Germany
| | - M Krane
- DZHK (German Center for Cardiovascular Research) - Partner Site Munich Heart Alliance, Munich, Germany; Division of Cardiac Surgery, Yale University School of Medicine, New Haven, CT, USA
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Chakova NN, Dolmatovich TV, Niyazova SS, Komissarova SM, Rebeko ES, Savchenko AA. New Missense Mutation Gly238Ala in the TBX5 Gene and Its Phenotypical Characteristics. RUSS J GENET+ 2021. [DOI: 10.1134/s1022795421070061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Functional analysis of two novel TBX5 variants present in individuals with Holt-Oram syndrome with different clinical manifestations. Mol Genet Genomics 2021; 296:809-821. [PMID: 33866394 DOI: 10.1007/s00438-021-01781-2] [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] [Received: 09/18/2020] [Accepted: 03/29/2021] [Indexed: 02/07/2023]
Abstract
Holt-Oram syndrome (HOS) is a rare disorder characterized by cardiac and upper-limb defects. Pathogenic variants in TBX5-a gene encoding a transcription factor important for heart and skeletal development-are the only known cause of HOS. Here, we present the identification and functional analysis of two novel TBX5 pathogenic variants found in two individuals with HOS presenting distinct phenotypes. The individual with the c.905delA variant has a severe cardiac phenotype but mild skeletal defects, unlike the individual with the c.246_249delGATG variant who has no cardiac problems but severe upper limbs malformations, including phocomelia. Both frameshift variants, c.246_249delGATG and c.905delA, generate mRNAs harbouring premature stop codons which, if not degraded by nonsense mediated decay, will lead to the production of shorter TBX5 proteins, p.Gln302Argfs*92 and p.Met83Phefs*6, respectively. Immunocytochemistry results suggest that both mutated proteins are produced and furthermore, like the wild-type protein, p.Gln302Argfs*92 mutant appears to be mainly localized in the nucleus, in contrast with p.Met83Phefs*6 mutant that displays a higher level of cytoplasmic localization. In addition, luciferase activity analysis revealed that none of the TBX5 mutants are capable of transactivating the NPPA promoter. In conclusion, our results provide evidence that both pathogenic variants cause a severe TBX5 loss-of-function, dramatically reducing its biological activity. The absence of cardiac problems in the individual with the p.Met83Phefs*6 variant supports the existence of other mechanisms/genes underlying the pathogenesis of HOS and/or the existence of an age-related delay in the development of a more serious cardiac phenotype. Further studies are required to understand the differential effects observed in the phenotypes of both individuals.
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He GN, Wang XY, Kang M, Chen XM, Xi N, Zhao J, Chen X. Prenatal Diagnosis of Holt-Oram Syndrome With a Novel Mutation of TBX5 Gene: A Case Report. Front Pediatr 2021; 9:737633. [PMID: 34738001 PMCID: PMC8561953 DOI: 10.3389/fped.2021.737633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 08/27/2021] [Indexed: 11/30/2022] Open
Abstract
Background: Holt-Oram syndrome (HOS) is an autosomal dominant disorder caused by mutations of TBX5 gene. Case presentation: We report a fetus with HOS diagnosed sonographically at 23 weeks of gestation. The fetal parents are non-consanguineous. The fetus exhibited short radius and ulna, inability to supinate the hands, absence of the right thumb, and heart ventricular septal defect (VSD), while the fetal father exhibited VSD and short radius and ulna only. Fetal brother had cubitus valgus and thumb adduction, except for VSD, short radius and ulna. The pregnancy was terminated. Whole-exome sequencing (WES) revealed a novel mutation in the TBX5 (c.510+1G>A) in the fetus inherited from the father. The variant (c.510+1G>A) occurs at splice donor and may alter TBX5 gene function by impact on splicing. It was not previously reported in China. Conclusion: Our case reported a novel mutation in TBX5, which expanded the known genetic variants associated with HOS.
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Affiliation(s)
- Guan-Nan He
- Department of Ultrasound, Women and Children's Hospital of Sichuan, Chengdu, China
| | - Xue-Yan Wang
- Department of Prenatal Diagnosis, Women and Children's Hospital of Sichuan, Chengdu, China
| | - Min Kang
- Department of Radiology, Women and Children's Hospital of Sichuan, Chengdu, China
| | - Xi-Min Chen
- Department of Prenatal Diagnosis, Women and Children's Hospital of Sichuan, Chengdu, China
| | - Na Xi
- Department of Prenatal Diagnosis, Women and Children's Hospital of Sichuan, Chengdu, China
| | - Jing Zhao
- Department of Ultrasound, Women and Children's Hospital of Sichuan, Chengdu, China
| | - Xi Chen
- Department of Ultrasound, Women and Children's Hospital of Sichuan, Chengdu, China
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Varela D, Conceição N, Cancela ML. Transcriptional regulation of human T-box 5 gene (TBX5) by bone- and cardiac-related transcription factors. Gene 2020; 768:145322. [PMID: 33221539 DOI: 10.1016/j.gene.2020.145322] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 11/14/2020] [Indexed: 01/22/2023]
Abstract
T-box 5 (TBX5) protein belongs to the T-box family whose members play a crucial role in cell-type specification, morphogenesis and organogenesis. TBX5 is a transcription factor important for cardiac development and upper limbs formation and its haploinsufficiency causes Holt-Oram syndrome (HOS). An increase in TBX5 dosage also leads to HOS, suggesting that TBX5 is a dose-sensitive transcription factor that needs to be tightly regulated but the molecular mechanisms involved remain unclear. In this work we report the cloning and functional analysis of human TBX5 promoter region 1 (upstream of exon 1) and promoter region 2 (upstream of exon 2), that probably regulate the transcription of the different transcript variants. In silico analysis showed several binding sites for cardiac and skeletal related transcription factors (TFs) and their functionality was assessed using promoter-luciferase constructions and TF-expressing vectors. MEF2A (Myocyte enhancer factor 2 A) was shown to positively regulate both TBX5 promoters, while EGR1 (early growth response 1) repressed both promoters. SOX9 (SRY (sex determining region Y)-box 9) repressed only the activity of promoter region 2. Interestingly, YY1 (Yin and yang 1) repressed promoter region 1 (that regulates the expression of variant 1 and 3), but activated promoter region 2 (that regulates the expression of variant 4). In conclusion, this work provides novel insights toward the better understanding of TBX5 transcriptional regulation by cardiac- and skeletal-related TFs.
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Affiliation(s)
- Débora Varela
- Centre of Marine Sciences (CCMAR), University of Algarve, Faro, Portugal; PhD Program in Biomedical Sciences, Faculty of Medicine and Biomedical Sciences, University of Algarve, Faro, Portugal
| | - Natércia Conceição
- Centre of Marine Sciences (CCMAR), University of Algarve, Faro, Portugal; Faculty of Medicine and Biomedical Sciences, University of Algarve, Faro, Portugal; Algarve Biomedical Centre (ABC) University of Algarve, Faro, Portugal.
| | - M Leonor Cancela
- Centre of Marine Sciences (CCMAR), University of Algarve, Faro, Portugal; Faculty of Medicine and Biomedical Sciences, University of Algarve, Faro, Portugal; Algarve Biomedical Centre (ABC) University of Algarve, Faro, Portugal; Centre for Biomedical Research (CBMR), University of Algarve, Faro, Portugal.
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Mu X, Chen X, Liu J, Yuan L, Wang D, Qian L, Qian Y, Shen G, Huang Y, Li X, Li Y, Lin X. A multi-omics approach reveals molecular mechanisms by which phthalates induce cardiac defects in zebrafish (Danio rerio). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 265:113876. [PMID: 32806432 DOI: 10.1016/j.envpol.2019.113876] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Revised: 12/16/2019] [Accepted: 12/22/2019] [Indexed: 06/11/2023]
Abstract
The potential risks of phthalates affecting human and animal health as well as the environment are emerging as serious concerns worldwide. However, the mechanism by which phthalates induce developmental effects is under debate. Herein, we found that embryonic exposure of zebrafish to di-(2-ethylhexyl) phthalate (DEHP) and di-butyl phthalate (DBP) increased the rate of heart defects including abnormal heart rate and pericardial edema. Changes in the transcriptional profile demonstrated that genes involved in the development of the heart, such as tbx5b, nppa, ctnt, my17, cmlc1, were significantly altered by DEHP and DBP at 50 μg/L, which agreed with the abnormal cardiac outcomes. Methylated DNA immunoprecipitation sequencing (MeDIP-Seq) further showed that significant hypomethylation of nppa and ctnt was identified after DEHP and DBP exposure, which was consistent with the up-regulation of these genes. Notably, hypermethylation on the promoter region (<1 kb) of tbx5b was found after DEHP and DBP exposure, which might be responsible for its decrease in transcription. In conclusion, phthalates have the potential to induce cardiac birth defects, which might be associated with the transcriptional regulation of the involved developmental factors such as tbx5b. These findings would contribute to understand the molecular pathways that mediated the cardiac defects caused by phthalates.
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Affiliation(s)
- Xiyan Mu
- Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China.
| | - Xiaofeng Chen
- College of Sciences, China Agricultural University, People's Republic of China
| | - Jia Liu
- Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China
| | - Lilai Yuan
- Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China
| | - Donghui Wang
- College of Life Sciences, Peking University, Beijing, People's Republic of China
| | - Le Qian
- College of Sciences, China Agricultural University, People's Republic of China
| | - Yu Qian
- Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China
| | - Gongming Shen
- Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China
| | - Ying Huang
- Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China
| | - Xuxing Li
- Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China
| | - Yingren Li
- Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China
| | - Xiangming Lin
- Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China
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TBX5 R264K acts as a modifier to develop dilated cardiomyopathy in mice independently of T-box pathway. PLoS One 2020; 15:e0227393. [PMID: 32236096 PMCID: PMC7112173 DOI: 10.1371/journal.pone.0227393] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Accepted: 03/05/2020] [Indexed: 11/28/2022] Open
Abstract
Background TBX5 is a transcription factor that has an important role in development of heart. TBX5 variants in the region encoding the T-box domain have been shown to cause cardiac defects, such as atrial septal defect or ventricular septal defect, while TBX5 variants have also been identified in a few cardiomyopathy patients and considered causative. We identified a TBX5 variant (c.791G>A, p.Arg264Lys), that is over-represented in cardiomyopathy patients. This variant is located outside of the T-box domain, and its pathogenicity has not been confirmed by functional analyses. Objective To investigate whether the TBX5 R264K is deleterious and could contribute to the pathogenesis of cardiomyopathy. Methods and results We developed mice expressing Tbx5 R264K. Mice homozygous for this variant displayed compensated dilated cardiomyopathy; mild decreased fractional shortening, dilatation of the left ventricle, left ventricular wall thinning and increased heart weight without major heart structural disorders. There was no difference in activation of the ANF promotor, a transcriptional target of Tbx5, compared to wild-type. However, analysis of RNA isolated from left ventricular samples showed significant increases in the expression of Acta1 in left ventricle with concomitant increases in the protein level of ACTA1. Conclusions Mice homozygous for Tbx5 R264K showed compensated dilated cardiomyopathy. Thus, TBX5 R264K may have a significant pathogenic role in some cardiomyopathy patients independently of T-box domain pathway.
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Congenital heart diseases: genetics, non-inherited risk factors, and signaling pathways. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2020. [DOI: 10.1186/s43042-020-0050-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Abstract
Background
Congenital heart diseases (CHDs) are the most common congenital anomalies with an estimated prevalence of 8 in 1000 live births. CHDs occur as a result of abnormal embryogenesis of the heart. Congenital heart diseases are associated with significant mortality and morbidity. The damage of the heart is irreversible due to a lack of regeneration potential, and usually, the patients may require surgical intervention. Studying the developmental biology of the heart is essential not only in understanding the mechanisms and pathogenesis of congenital heart diseases but also in providing us with insight towards developing new preventive and treatment methods.
Main body
The etiology of congenital heart diseases is still elusive. Both genetic and environmental factors have been implicated to play a role in the pathogenesis of the diseases. Recently, cardiac transcription factors, cardiac-specific genes, and signaling pathways, which are responsible for early cardiac morphogenesis have been extensively studied in both human and animal experiments but leave much to be desired. The discovery of novel genetic methods such as next generation sequencing and chromosomal microarrays have led to further study the genes, non-coding RNAs and subtle chromosomal changes, elucidating their implications to the etiology of congenital heart diseases. Studies have also implicated non-hereditary risk factors such as rubella infection, teratogens, maternal age, diabetes mellitus, and abnormal hemodynamics in causing CHDs.
These etiological factors raise questions on multifactorial etiology of CHDs. It is therefore important to endeavor in research based on finding the causes of CHDs. Finding causative factors will enable us to plan intervention strategies and mitigate the consequences associated with CHDs. This review, therefore, puts forward the genetic and non-genetic causes of congenital heart diseases. Besides, it discusses crucial signaling pathways which are involved in early cardiac morphogenesis. Consequently, we aim to consolidate our knowledge on multifactorial causes of CHDs so as to pave a way for further research regarding CHDs.
Conclusion
The multifactorial etiology of congenital heart diseases gives us a challenge to explicitly establishing specific causative factors and therefore plan intervention strategies. More well-designed studies and the use of novel genetic technologies could be the way through the discovery of etiological factors implicated in the pathogenesis of congenital heart diseases.
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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: 18] [Impact Index Per Article: 3.6] [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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14
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Aoki H, Horie M. Electrical disorders in atrial septal defect: genetics and heritability. J Thorac Dis 2018; 10:S2848-S2853. [PMID: 30305944 DOI: 10.21037/jtd.2018.02.53] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Atrial septal defect (ASD) is one of the most common types of congenital heart diseases (CHDs). Most ASDs occur sporadically, but some are inherited and associated with cardiac conduction defects such as atrioventricular block (AVB) or bundle branch block. Mutations in genes encoding transcription factor gene TBX5 and NKX2-5, were found in Holt-Oram syndrome (HOS) and ASD with atrioventricular (AV) conduction defects, respectively. HOS is characterized by upper limb anomaly in addition to ASD and AVB (heart-hand syndrome). ASD associated with NKX2-5 is rare but is reported to cause sudden cardiac death (SCD) or cardiomyopathy. We provide a review of these two diseases.
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Affiliation(s)
- Hisaaki Aoki
- Department of Pediatric Cardiology, Osaka Women's and Children's Hospital, Osaka, Japan
| | - Minoru Horie
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Ohtsu, Shiga, Japan
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15
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Bioinformatics analysis of non-synonymous variants in the KLF genes related to cardiac diseases. Gene 2018; 650:68-76. [DOI: 10.1016/j.gene.2018.01.085] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/23/2017] [Accepted: 01/25/2018] [Indexed: 12/25/2022]
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16
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Khatami M, Heidari MM, Kazeminasab F, Zare Bidaki R. Identification of a novel non-sense mutation in TBX5 gene in pediatric patients with congenital heart defects. J Cardiovasc Thorac Res 2018; 10:41-45. [PMID: 29707177 PMCID: PMC5913692 DOI: 10.15171/jcvtr.2018.07] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 03/04/2018] [Indexed: 12/19/2022] Open
Abstract
Introduction: Congenital heart diseases (CHDs) are structural cardiovascular malformations that arise from abnormal development of the heart during the prenatal life. Mutations in the TBX5 gene, encoding T-box transcription factor, are a major cause of CHD. To evaluate the TBX5 mutations in hotspot exons in sporadic pediatric patients with CHD phenotypes, analytical case/control study performed in an Iranian cohort of unrelated patients with clinical diagnosis of congenital heart malformations. Methods: We investigated TBX5 coding exons 4, 5, 6 and 7 in 95 sporadic patients with CHD phenotypes and compared to 82 healthy controls using PCR-SSCP and DNA sequencing approaches. Results: We report here on a novel and heterozygote Non-sense mutation in exon 5 of TBX5, E128X (G14742T), in two Iranian children. This mutation locates inside the T-box and both of pediatric patients carrying this novel mutation suffer from severe heart malformations. The G14742T mutation leads to the substitution of glutamic acid (E) by stop codon (X) at residue 128, an evolutionarily conserved position in T-box as well as in other species. The non-sense mutation of E128X was predicted to be pathogenic by Mutation Taster and Polyphen software programs. Conclusion: TBX5 E128X mutation results in a translational premature stop. This type of mutation results in a shortened protein that may function improperly and which cannot bind to other transcription factors; therefore, haploinsufficiency of TBX5 protein is presumably causing the severe cardiac malformations in these patients.
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Affiliation(s)
- Mehri Khatami
- Department of Biology, Faculty of Science, Yazd University, Yazd, Iran
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17
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Hoelscher SC, Doppler SA, Dreßen M, Lahm H, Lange R, Krane M. MicroRNAs: pleiotropic players in congenital heart disease and regeneration. J Thorac Dis 2017; 9:S64-S81. [PMID: 28446969 DOI: 10.21037/jtd.2017.03.149] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Congenital heart disease (CHD) is the leading cause of infant death, affecting approximately 4-14 live births per 1,000. Although surgical techniques and interventions have improved significantly, a large number of infants still face poor clinical outcomes. MicroRNAs (miRs) are known to coordinately regulate cardiac development and stimulate pathological processes in the heart, including fibrosis or hypertrophy and impair angiogenesis. Dysregulation of these regulators could therefore contribute (I) to the initial development of CHD and (II) at least partially to the observed clinical outcomes of many CHD patients by stimulating the aforementioned pathways. Thus, miRs may exhibit great potential as therapeutic targets in regenerative medicine. In this review we provide an overview of miR function and elucidate their role in selected CHDs, including hypoplastic left heart syndrome (HLHS), tetralogy of Fallot (TOF), ventricular septal defects (VSDs) and Holt-Oram syndrome (HOS). We then bridge this knowledge to the potential usefulness of miRs and/or their targets in therapeutic strategies for regenerative purposes in CHDs.
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Affiliation(s)
- Sarah C Hoelscher
- Division of Experimental Surgery, Department of Cardiovascular Surgery, German Heart Center Munich, Technische Universität München, Munich, Germany
| | - Stefanie A Doppler
- Division of Experimental Surgery, Department of Cardiovascular Surgery, German Heart Center Munich, Technische Universität München, Munich, Germany
| | - Martina Dreßen
- Division of Experimental Surgery, Department of Cardiovascular Surgery, German Heart Center Munich, Technische Universität München, Munich, Germany
| | - Harald Lahm
- Division of Experimental Surgery, Department of Cardiovascular Surgery, German Heart Center Munich, Technische Universität München, Munich, Germany
| | - Rüdiger Lange
- Division of Experimental Surgery, Department of Cardiovascular Surgery, German Heart Center Munich, Technische Universität München, Munich, Germany.,DZHK (German Center for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany
| | - Markus Krane
- Division of Experimental Surgery, Department of Cardiovascular Surgery, German Heart Center Munich, Technische Universität München, Munich, Germany.,DZHK (German Center for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany
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