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Fraile A, Cebrián J, Thuissard-Vasallo I, Pérez-Martín S, Casado R, Gil-Fournier B, Alonso-Martín J, Tamargo J, Caballero R, Delpón E, Cosío FG. Coexistent HCN4 and GATA5 rare variants and Atrial Fibrillation in a large Spanish Family. Can J Cardiol 2024:S0828-282X(24)00189-2. [PMID: 38432398 DOI: 10.1016/j.cjca.2024.02.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 02/02/2024] [Accepted: 02/28/2024] [Indexed: 03/05/2024] Open
Abstract
BACKGROUND Familial association of atrial fibrillation (AF) can involve single gene variants related to known arrhythmogenic mechanisms; however, genome-wide association studies often disclose complex genetic variants in familial and non-familial AF, making it difficult to relate to known pathogenetic mechanisms. METHODS The finding of 4 siblings with AF led to studying 47 members of a family. Long-term Holter monitoring (298 hours average) ruled out silent AFWhole-exome sequencing was performed and variants shared by the index cases were filtered and prioritized according to current recommendations. HCN4 currents (IHCN4) were recorded in Chinese hamster ovary cells expressing human p.P1163H and/or native Hcn4 channels using the patch-clamp technique and topologically associated domain analysis of GATA5 variant carriers were performed. RESULTS The clinical study diagnosed 2 more AF cases. Five family members carried the heterozygous p.P1163H, HCN4 variant, 14 the intronic 20,61040536,G,A GATA5 rare variant, and 9 carried both variants (HCN4+GATA5). Five of the 6 AF cases (onset age ranging 33-70 years) carried both variants and one the GATA5 variant alone. Multivariate analysis showed that the presence of HCN4+GATA5 variants significantly and independently increased AF risk [OR=32.740 (1.812-591.408)] and not age, hypertension or overweight. Functional testing showed that IHcn4 generated by heterozygous p.P1163H were normal. Topologically associating domain analysis suggested that GATA5 could affect the expression of many genes, including those encoding microRNA-1. CONCLUSION The coincidence of two rare gene variants was independently associated with AF, but functional studies do not allow the postulation of the arrhythmogenic mechanism(s) involved.
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Affiliation(s)
- Alfonso Fraile
- Cardiology Department. Hospital Universitario de Getafe. Carretera de Toledo, Km. 12,500. 28905-Getafe, Spain.
| | - Jorge Cebrián
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid. Instituto de Investigación Gregorio Marañón. CIBERCV. 28040-Madrid, Spain
| | - Israel Thuissard-Vasallo
- Department of Biomedical and Health Sciences. Universidad Europea de Madrid. 28670-Madrid, Spain
| | - Sara Pérez-Martín
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid. Instituto de Investigación Gregorio Marañón. CIBERCV. 28040-Madrid, Spain
| | - Raquel Casado
- Cardiology Department. Hospital Universitario de Getafe. Carretera de Toledo, Km. 12,500. 28905-Getafe, Spain
| | - Belen Gil-Fournier
- Cardiology Department. Hospital Universitario de Getafe. Carretera de Toledo, Km. 12,500. 28905-Getafe, Spain
| | - Joaquín Alonso-Martín
- Cardiology Department. Hospital Universitario de Getafe. Carretera de Toledo, Km. 12,500. 28905-Getafe, Spain
| | - Juan Tamargo
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid. Instituto de Investigación Gregorio Marañón. CIBERCV. 28040-Madrid, Spain
| | - Ricardo Caballero
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid. Instituto de Investigación Gregorio Marañón. CIBERCV. 28040-Madrid, Spain.
| | - Eva Delpón
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid. Instituto de Investigación Gregorio Marañón. CIBERCV. 28040-Madrid, Spain
| | - Francisco G Cosío
- Department of Biomedical and Health Sciences. Universidad Europea de Madrid. 28670-Madrid, Spain
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Feng H, Lin B, Zheng Y, Xu J, Zhou Y, Liu K, Zhu M, Li M. Overexpression of GATA5 Stimulates Paclitaxel to Inhibit Malignant Behaviors of Hepatocellular Carcinoma Cells. Cell J 2020; 22:89-100. [PMID: 32779438 PMCID: PMC7481888 DOI: 10.22074/cellj.2020.6894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 09/15/2019] [Indexed: 11/04/2022]
Abstract
Objective Explore the effect of GATA5 expression on Paclitaxel inhibiting growth of hepatocellular carcinoma (HCC) cells. Materials and Methods In the experimental study, HCC cell lines (HLE, Bel7402 and PLC/PRF/5) were treated with different concentrations of Paclitaxel (5-20 mg/ml) for 24 hours. HLE cells were transfected with GATA5-siRNA vector, while Bel7402 and PLC/PRF/5 cells were transfected with overexpressed GATA5 vector for 24 hours, followed by treatment of the cells with Paclitaxel (10 mg/ml) for 24 hours and subsequently 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) assay to detect growth of HCC cells. Soft agar cultured was used to analyze formation of colony. Apoptosis of HCC cells were detected by Flow cytometer. Migration of HCC cells was observed by trawell assays. Western blotting and laser confocal microscopy were utilized to detect expression and location of the proteins. Results Inhibiting expression of GATA5 reduced sensitivity of HLE cells to Paclitaxel, while overexpression of GATA5 increased sensitivity of Bel7402 cells and PLC/PRF/5 cells to Paclitaxel. Overexpression of GATA5 played a role in stimulating Paclitaxel to inhibit growth, colony formation and migration, as well as enhance apoptosis in HCC cells. Overexpression of GATA5 also promoted Paclitaxel to inhibit expression of reprogramming genes, such as Nanog, EpCAM, c-Myc and Sox2 in Bel7402 and PLC/PRF/5 cells. Inhibited expression of GATA5 led to enhancement of the expression of CD44 and CD133, in HLE cells. Overexpression of GATA5 was not only alone but also synergized with Paclitaxel to inhibit expression of CD44 and CD133 in Bel7402 or PLC/PRF/5 cells. Conclusion Overexpression of GATA5 played a role in enhancing Paclitaxel to inhibit the malignant behaviors of HCC cells. It was involved in suppressing expression of the reprogramming genes and stemness markers. Targeting GATA5 is an available strategy for applying paclitaxel to therapy of patients with HCC.
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Affiliation(s)
- Haipeng Feng
- Hainan Provincial Key Laboratory of Carcinogenesis and Intervention, Hainan Medical College, Haikou, Hainan Province, China
| | - Bo Lin
- Hainan Provincial Key Laboratory of Carcinogenesis and Intervention, Hainan Medical College, Haikou, Hainan Province, China
| | - Yifei Zheng
- Hainan Provincial Key Laboratory of Carcinogenesis and Intervention, Hainan Medical College, Haikou, Hainan Province, China
| | - Junnv Xu
- Hainan Provincial Key Laboratory of Carcinogenesis and Intervention, Hainan Medical College, Haikou, Hainan Province, China.,Department of Tumor Internal Medicine, Second affiliated Hospital of Hainan Medical College, Haikou, Hainan Province, China
| | - Ying Zhou
- Hainan Provincial Key Laboratory of Carcinogenesis and Intervention, Hainan Medical College, Haikou, Hainan Province, China
| | - Kun Liu
- Hainan Provincial Key Laboratory of Carcinogenesis and Intervention, Hainan Medical College, Haikou, Hainan Province, China
| | - Mingyue Zhu
- Hainan Provincial Key Laboratory of Carcinogenesis and Intervention, Hainan Medical College, Haikou, Hainan Province, China
| | - Mengsen Li
- Hainan Provincial Key Laboratory of Carcinogenesis and Intervention, Hainan Medical College, Haikou, Hainan Province, China. Electronic Address: .,Institution of Tumor, Hainan Medical College, Haikou, Hainan Province, China
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Abstract
It is known that functional defects of GATA binding protein 5 (GATA5), an important member of GATA transcription factor family, could cause multiple congenital defects. However, the mechanisms of this transcription factor in cardiovascular diseases are still little known. Finding a genetic approach should help with understanding the possible roles of GATA5 in different cardiovascular diseases and purpose it as a possible therapeutic agent. Hence, this review is divided into three chapters to summarize the roles and main regulatory mechanisms of GATA5 in hypertension, arrhythmia and congenital heart disease, respectively. In each chapter, this review firstly introduces the roles of GATA5 mutations, and then discusses the main regulatory mechanisms of GATA5 in the corresponding diseases (Such as the endothelial dysfunction signaling pathway in the chapter of hypertension, GATA5-NaV1.5 signaling pathway in the chapter of arrhythmia, GATA5-HEY2 and GATA5-Nodal signaling pathway in the chapter of congenital heart disease). Additionally, based on these regulatory networks, it is also speculated that abnormal methylation of the GATA5 gene promoter may lead to cardiovascular diseases such as congenital heart disease. This conjecture is proposed to enrich the regulatory networks of GATA5 and provide a theoretical basis for diagnosis and treatment of cardiovascular diseases.
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Affiliation(s)
- Zhi-Peng Song
- Department of Medicine, Shandong University School of Medicine, Jinan, Shandong, 250014, P. R. China
| | - Bo Yan
- The Center for Molecular Genetics of Cardiovascular Diseases, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, Shandong, 272000, P. R. China.,Shandong Provincial Sino-US Cooperation Research Center for Translational Medicine, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, Shandong, 272000, P. R. China.,Shandong Provincial Key Laboratory of Cardiac Disease Diagnosis and Treatment, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, Shandong, 272000, P. R. China
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Liu Y, Zhu H, Liu Y, Qu J, Han M, Jin C, Zhang Q, Liu J. Molecular characterization and expression profiles provide new insights into GATA5 functions in tongue sole (Cynoglossus semilaevis). Gene 2019; 708:21-29. [PMID: 31082502 DOI: 10.1016/j.gene.2019.05.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 05/02/2019] [Accepted: 05/09/2019] [Indexed: 10/26/2022]
Abstract
GATA5 is a member of the GATA transcription factor family, which serves essential roles in varieties of cellular functions and biological processes. In this study, we have accomplished the molecular cloning, bioinformatic analysis and preliminary function study of C. semilaevis GATA5. The full-length cDNA nucleotide sequence is 1955 bp, with a coding sequence of 1167 bp, which encodes a polypeptide of 388 amino acids. Homology, phylogenetic, gene structure and synteny analysis showed that C. semilaevis GATA5 was highly conserved among vertebrates. Tissue distribution pattern exhibited that C. semilaevis GATA5 was significantly expressed in heart, intestine, liver, kidney and gonad, with a sexual dimorphic feature observed in testis and ovary. Embryonic development expression profiles showed that C. semilaevis GATA5 transcripts increased at the blastula stage, and peaked at the heat-beating period. Strong signals were detected at spermatids of male testis and stage III oocytes of female ovary by ISH. The expression of C. semilaevis GATA5 was regulated by 17α-MT and E2 after hormone stimulation to the ovary. Together, all the results pointed out that GATA5 might play a vital role during gonadal maturation and the reproductive cycle of C. semilaevis. This study lays the foundation for further researches on the sex control breeding in tongue sole.
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Affiliation(s)
- Yuxiang Liu
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003 Qingdao, Shandong, China
| | - He Zhu
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Yuezhong Liu
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Jiangbo Qu
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Miao Han
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Chaofan Jin
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Quanqi Zhang
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003 Qingdao, Shandong, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, 266237 Qingdao, Shandong, China
| | - Jinxiang Liu
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003 Qingdao, Shandong, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, 266237 Qingdao, Shandong, China.
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Wen B, Yuan H, Liu X, Wang H, Chen S, Chen Z, de The H, Zhou J, Zhu J. GATA5 SUMOylation is indispensable for zebrafish cardiac development. Biochim Biophys Acta Gen Subj 2017; 1861:1691-1701. [PMID: 28285006 DOI: 10.1016/j.bbagen.2017.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 01/07/2017] [Accepted: 03/07/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND SUMOylation is a critical regulatory protein modification in eukaryotic cells and plays a pivotal role in cardiac development and disease. Several cardiac transcription factors are modified by SUMO, but little is known about the impact of SUMOylation on their function during cardiac development. METHODS We used a zebrafish model to address the impact of SUMOylation on GATA5, an essential transcription factor in zebrafish cardiac development. GATA5 SUMOylation was probed by western blot, the subcellular localization and transcriptional activity of GATA5 mutants were examined by immunostaining and luciferase reporter assay. The in vivo function of GATA5 SUMOylation was evaluated by gata5 mutants mRNA microinjection and in situ hybridization in gata5 morphants and ubc9 mutants. RESULTS Firstly, we identified GATA5 as a SUMO substrate, and lysine 324 (K324) and lysine 360 (K360) as two major modification sites. Conversion of lysine to arginine at these two sites did not affect subcellular localization, but did affect the transcriptional activity of GATA5. Secondly, in vivo experiments demonstrated that the wild type (WT) and K324R mutant of gata5 could rescue impaired cardiac precursor differentiation, while the K360R mutant of gata5 drastically lost this potency in gata5 morphant. Furthermore, in SUMOylation-deficient ubc9 mutants, the abnormal expression pattern displayed by the early markers of cardiac development (nkx2.5 and mef2cb) could be restored using a sumo-gata5 fusion, but not with a WT gata5. CONCLUSION GATA5 SUMOylation is indispensable for early zebrafish cardiac development. GENERAL SIGNIFICANCE Our studies highlight the potential importance of transcription factor SUMOylation in cardiac development.
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Affiliation(s)
- Bin Wen
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hao Yuan
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaohui Liu
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Haihong Wang
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Saijuan Chen
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhu Chen
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hugues de The
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Université de Paris 7/INSERM/CNRS UMR 944/7212, Equipe Labellisée No. 11 Ligue Nationale Contre le Cancer, Hôpital St. Louis, Paris, France
| | - Jun Zhou
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| | - Jun Zhu
- CNRS-LIA Hematology and Cancer, Sino-French Research Center for Life Sciences and Genomics, State Key Laboratory of Medical Genomics, Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Université de Paris 7/INSERM/CNRS UMR 944/7212, Equipe Labellisée No. 11 Ligue Nationale Contre le Cancer, Hôpital St. Louis, Paris, France.
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Tarradas A, Pinsach-Abuin ML, Mackintosh C, Llorà-Batlle O, Pérez-Serra A, Batlle M, Pérez-Villa F, Zimmer T, Garcia-Bassets I, Brugada R, Beltran-Alvarez P, Pagans S. Transcriptional regulation of the sodium channel gene (SCN5A) by GATA4 in human heart. J Mol Cell Cardiol 2016; 102:74-82. [PMID: 27894866 DOI: 10.1016/j.yjmcc.2016.10.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 10/07/2016] [Accepted: 10/24/2016] [Indexed: 01/12/2023]
Abstract
Aberrant expression of the sodium channel gene (SCN5A) has been proposed to disrupt cardiac action potential and cause human cardiac arrhythmias, but the mechanisms of SCN5A gene regulation and dysregulation still remain largely unexplored. To gain insight into the transcriptional regulatory networks of SCN5A, we surveyed the promoter and first intronic regions of the SCN5A gene, predicting the presence of several binding sites for GATA transcription factors (TFs). Consistent with this prediction, chromatin immunoprecipitation (ChIP) and sequential ChIP (Re-ChIP) assays show co-occupancy of cardiac GATA TFs GATA4 and GATA5 on promoter and intron 1 SCN5A regions in fresh-frozen human left ventricle samples. Gene reporter experiments show GATA4 and GATA5 synergism in the activation of the SCN5A promoter, and its dependence on predicted GATA binding sites. GATA4 and GATA6 mRNAs are robustly expressed in fresh-frozen human left ventricle samples as measured by highly sensitive droplet digital PCR (ddPCR). GATA5 mRNA is marginally but still clearly detected in the same samples. Importantly, GATA4 mRNA levels are strongly and positively correlated with SCN5A transcript levels in the human heart. Together, our findings uncover a novel mechanism of GATA TFs in the regulation of the SCN5A gene in human heart tissue. Our studies suggest that GATA5 but especially GATA4 are main contributors to SCN5A gene expression, thus providing a new paradigm of SCN5A expression regulation that may shed new light into the understanding of cardiac disease.
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Affiliation(s)
- Anna Tarradas
- Medical Sciences Department, School of Medicine, University of Girona, 17071 Girona, Spain; Institut d'Investigació Biomèdica de Girona, 17190 Salt, Spain
| | - Mel Lina Pinsach-Abuin
- Medical Sciences Department, School of Medicine, University of Girona, 17071 Girona, Spain; Institut d'Investigació Biomèdica de Girona, 17190 Salt, Spain; School of Medicine, University of California San Diego, La Jolla, CA 92093-0648, USA
| | - Carlos Mackintosh
- School of Medicine, University of California San Diego, La Jolla, CA 92093-0648, USA
| | - Oriol Llorà-Batlle
- Medical Sciences Department, School of Medicine, University of Girona, 17071 Girona, Spain; Institut d'Investigació Biomèdica de Girona, 17190 Salt, Spain
| | - Alexandra Pérez-Serra
- Medical Sciences Department, School of Medicine, University of Girona, 17071 Girona, Spain; Institut d'Investigació Biomèdica de Girona, 17190 Salt, Spain
| | - Montserrat Batlle
- Thorax Institute, Cardiology Department, Hospital Clínic, University of Barcelona, Institute of Biomedical Research August Pi i Sunyer, 08036 Barcelona, Spain
| | - Félix Pérez-Villa
- Thorax Institute, Cardiology Department, Hospital Clínic, University of Barcelona, Institute of Biomedical Research August Pi i Sunyer, 08036 Barcelona, Spain
| | - Thomas Zimmer
- Institute for Physiology II, University Hospital, 07743 Jena, Germany
| | - Ivan Garcia-Bassets
- School of Medicine, University of California San Diego, La Jolla, CA 92093-0648, USA
| | - Ramon Brugada
- Medical Sciences Department, School of Medicine, University of Girona, 17071 Girona, Spain; Institut d'Investigació Biomèdica de Girona, 17190 Salt, Spain; Hospital Universitari Dr. Josep Trueta, 17001 Girona, Spain
| | - Pedro Beltran-Alvarez
- Medical Sciences Department, School of Medicine, University of Girona, 17071 Girona, Spain; Institut d'Investigació Biomèdica de Girona, 17190 Salt, Spain; School of Biological, Biomedical, and Environmental Sciences, University of Hull, HU6 7RX, Hull, UK.
| | - Sara Pagans
- Medical Sciences Department, School of Medicine, University of Girona, 17071 Girona, Spain; Institut d'Investigació Biomèdica de Girona, 17190 Salt, Spain.
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Kassab K, Hariri H, Gharibeh L, Fahed AC, Zein M, El-Rassy I, Nemer M, El-Rassi I, Bitar F, Nemer G. GATA5 mutation homozygosity linked to a double outlet right ventricle phenotype in a Lebanese patient. Mol Genet Genomic Med 2015; 4:160-71. [PMID: 27066509 PMCID: PMC4799877 DOI: 10.1002/mgg3.190] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 11/04/2015] [Accepted: 11/04/2015] [Indexed: 12/21/2022] Open
Abstract
Background GATA transcription factors are evolutionary conserved zinc finger proteins with multiple roles in cell differentiation/proliferation and organogenesis. GATA5 is only transiently expressed in the embryonic heart, and the inactivation of both Gata5 alleles results in a partially penetrant bicuspid aortic valve (BAV) phenotype in mice. We hypothesized that only biallelic mutations in GATA5 could be disease causing. Methods A total of 185 patients with different forms of congenital heart disease (CHD) were screened along 150 healthy individuals for GATA4, 5, and 6. All patients' phenotypes were diagnosed with echocardiography. Results Sequencing results revealed eight missense variants (three of which are novel) in cases with various conotruncal and septal defects. Out of these, two were inherited in recessive forms: the p.T67P variant, which was found both in patients and in healthy individuals, and the previously described p.Y142H variant which was only found in a patient with a double outlet right ventricle (DORV). We characterized the p.Y142H variant and showed that it significantly reduced the transcriptional activity of the protein over cardiac promoters by 30–40%. Conclusion Our results do prove that p.Y142H is associated with DORV and suggests including GATA5 as a potential gene to be screened in patients with this phenotype.
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Affiliation(s)
- Kameel Kassab
- Department of Biochemistry and Molecular Genetics American University of Beirut Beirut Lebanon
| | - Hadla Hariri
- Department of Biochemistry and Molecular Genetics American University of Beirut Beirut Lebanon
| | - Lara Gharibeh
- Department of Biochemistry University of Ottawa Ottawa Ontario Canada
| | - Akl C Fahed
- Department of Genetics Harvard Medical School and Department of Internal Medicine Massachusetts General Hospital Boston Massachusetts
| | - Manal Zein
- Department of Biochemistry and Molecular Genetics American University of Beirut Beirut Lebanon
| | - Inaam El-Rassy
- Department of Biochemistry and Molecular Genetics American University of Beirut Beirut Lebanon
| | - Mona Nemer
- Department of Biochemistry University of Ottawa Ottawa Ontario Canada
| | - Issam El-Rassi
- Department of Pediatrics and Adolescent Medicine American University of Beirut Beirut Lebanon
| | - Fadi Bitar
- Department of Biochemistry and Molecular GeneticsAmerican University of BeirutBeirutLebanon; Department of SurgeryAmerican University of BeirutBeirutLebanon
| | - Georges Nemer
- Department of Biochemistry and Molecular Genetics American University of Beirut Beirut Lebanon
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Xia L, Gong Y, Zhang A, Cai S, Zeng Q. Loss of GATA5 expression due to gene promoter methylation induces growth and colony formation of hepatocellular carcinoma cells. Oncol Lett 2015; 11:861-869. [PMID: 26870297 DOI: 10.3892/ol.2015.3974] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 08/18/2015] [Indexed: 02/06/2023] Open
Abstract
GATA5 is a transcription factor that is capable of suppressing the development of various types of human cancer. The present study investigated the expression of GATA5 and GATA4, and examined their roles in the proliferation and colony formation ability of hepatocellular carcinoma (HCC) tissues and cells. The GATA4 and GATA5 expression levels and gene promoter methylation of HCC tissue samples from 38 patients and HCC cell lines were analyzed using reverse transcription-polymerase chain reaction (RT-PCR) and methylation-specific PCR (MSP), respectively. The effects of GATA4 and GATA5 overexpression on the proliferation and colony forming ability of HCC cells were also assessed using cell viability and colony formation assays. A luciferase reporter assay was utilized to investigate the transcriptional interaction of GATA4 and GATA5 with canonical Wnt signaling. The results indicated that the expression levels of GATA4 and GATA5 were lost or reduced following methylation of gene promoters in HCC tissues and cell lines. Treatment with a demethylating agent, 5-aza-2'-deoxycytidine (5-AZA), restored GATA4 and GATA5 expression in HCC cell lines. Furthermore, methylation of the GATA5 promoter was observed to be associated with the age of patients exhibiting HCC. Restoration of GATA4 and GATA5 expression inhibited colony formation and induced apoptosis of HCC cells in vitro. The present study concluded that the expression levels of GATA4 and GATA5 were reduced in HCC tissues and cell lines. Treatment with 5-AZA restored GATA4 and GATA5 expression in HCC cell lines, suppressing tumor cell growth and colony formation, as well as inducing apoptosis.
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Affiliation(s)
- Lei Xia
- Department of Medical Security, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Yan Gong
- Health Management Institute, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Aiqun Zhang
- Department of Hepatobiliary Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Shouwang Cai
- Department of Hepatobiliary Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Qiang Zeng
- Health Management Institute, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
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