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Au Yeung VPW, Obrezanova O, Zhou J, Yang H, Bowen TJ, Ivanov D, Saffadi I, Carter AS, Subramanian V, Dillmann I, Hall A, Corrigan A, Viant MR, Pointon A. Computational approaches identify a transcriptomic fingerprint of drug-induced structural cardiotoxicity. Cell Biol Toxicol 2024; 40:50. [PMID: 38940987 PMCID: PMC11213733 DOI: 10.1007/s10565-024-09880-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 05/15/2024] [Indexed: 06/29/2024]
Abstract
Structural cardiotoxicity (SCT) presents a high-impact risk that is poorly tolerated in drug discovery unless significant benefit is anticipated. Therefore, we aimed to improve the mechanistic understanding of SCT. First, we combined machine learning methods with a modified calcium transient assay in human-induced pluripotent stem cell-derived cardiomyocytes to identify nine parameters that could predict SCT. Next, we applied transcriptomic profiling to human cardiac microtissues exposed to structural and non-structural cardiotoxins. Fifty-two genes expressed across the three main cell types in the heart (cardiomyocytes, endothelial cells, and fibroblasts) were prioritised in differential expression and network clustering analyses and could be linked to known mechanisms of SCT. This transcriptomic fingerprint may prove useful for generating strategies to mitigate SCT risk in early drug discovery.
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Affiliation(s)
- Victoria P W Au Yeung
- Safety Sciences, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Cambridge, UK.
- Phenomics, Data Sciences & Quantitative Biology, R&D AstraZeneca, Cambridge, UK.
| | - Olga Obrezanova
- Imaging and Data Analytics, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Jiarui Zhou
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, UK
| | - Hongbin Yang
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge, Cambridge, UK
| | - Tara J Bowen
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, UK
| | - Delyan Ivanov
- High-Throughput Screening, R&D, AstraZeneca, Alderley Park, UK
| | - Izzy Saffadi
- Safety Sciences, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Alfie S Carter
- Safety Sciences, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Vigneshwari Subramanian
- Imaging and Data Analytics, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Inken Dillmann
- Disease Molecular Profiling, Discovery Biology, R&D AstraZeneca, Gothenburg, Sweden
| | - Andrew Hall
- Safety Sciences, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Adam Corrigan
- Phenomics, Data Sciences & Quantitative Biology, R&D AstraZeneca, Cambridge, UK
| | - Mark R Viant
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, UK
- Phenome Centre Birmingham, University of Birmingham, Edgbaston, Birmingham, UK
| | - Amy Pointon
- Safety Sciences, Clinical Pharmacology & Safety Sciences, R&D, AstraZeneca, Cambridge, UK
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Aung N, Lopes LR, van Duijvenboden S, Harper AR, Goel A, Grace C, Ho CY, Weintraub WS, Kramer CM, Neubauer S, Watkins HC, Petersen SE, Munroe PB. Genome-Wide Analysis of Left Ventricular Maximum Wall Thickness in the UK Biobank Cohort Reveals a Shared Genetic Background With Hypertrophic Cardiomyopathy. CIRCULATION. GENOMIC AND PRECISION MEDICINE 2023; 16:e003716. [PMID: 36598836 PMCID: PMC9946169 DOI: 10.1161/circgen.122.003716] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 10/13/2022] [Indexed: 01/05/2023]
Abstract
BACKGROUND Left ventricular maximum wall thickness (LVMWT) is an important biomarker of left ventricular hypertrophy and provides diagnostic and prognostic information in hypertrophic cardiomyopathy (HCM). Limited information is available on the genetic determinants of LVMWT. METHODS We performed a genome-wide association study of LVMWT measured from the cardiovascular magnetic resonance examinations of 42 176 European individuals. We evaluated the genetic relationship between LVMWT and HCM by performing pairwise analysis using the data from the Hypertrophic Cardiomyopathy Registry in which the controls were randomly selected from UK Biobank individuals not included in the cardiovascular magnetic resonance sub-study. RESULTS Twenty-one genetic loci were discovered at P<5×10-8. Several novel candidate genes were identified including PROX1, PXN, and PTK2, with known functional roles in myocardial growth and sarcomere organization. The LVMWT genetic risk score is predictive of HCM in the Hypertrophic Cardiomyopathy Registry (odds ratio per SD: 1.18 [95% CI, 1.13-1.23]) with pairwise analyses demonstrating a moderate genetic correlation (rg=0.53) and substantial loci overlap (19/21). CONCLUSIONS Our findings provide novel insights into the genetic underpinning of LVMWT and highlight its shared genetic background with HCM, supporting future endeavours to elucidate the genetic etiology of HCM.
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Affiliation(s)
- Nay Aung
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry (N.A., S.v.D., S.E.P., P.B.M.)
- National Institute for Health and Care Research, Barts Cardiovascular Biomedical Research Centre, Queen Mary University of London (N.A., S.v.D., S.E.P., P.B.M.)
- Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, West Smithfield (N.A., L.R.L., S.E.P.)
| | - Luis R Lopes
- Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, West Smithfield (N.A., L.R.L., S.E.P.)
- Centre for Heart Muscle Disease, Institute of Cardiovascular Science, University College London (L.R.L.)
| | - Stefan van Duijvenboden
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry (N.A., S.v.D., S.E.P., P.B.M.)
- National Institute for Health and Care Research, Barts Cardiovascular Biomedical Research Centre, Queen Mary University of London (N.A., S.v.D., S.E.P., P.B.M.)
| | - Andrew R Harper
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine (A.R.H., A.G., C.G., S.N., H.C.W.)
- Wellcome Centre for Human Genetics, University of Oxford, United Kingdom (A.R.H., A.G., C.G., H.C.W.)
| | - Anuj Goel
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine (A.R.H., A.G., C.G., S.N., H.C.W.)
- Wellcome Centre for Human Genetics, University of Oxford, United Kingdom (A.R.H., A.G., C.G., H.C.W.)
| | - Christopher Grace
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine (A.R.H., A.G., C.G., S.N., H.C.W.)
- Wellcome Centre for Human Genetics, University of Oxford, United Kingdom (A.R.H., A.G., C.G., H.C.W.)
| | - Carolyn Y Ho
- Cardiovascular Division, Department of Medicine and Department of Radiology, Brigham and Women's Hospital, Boston, MA (C.Y.H.)
| | | | - Christopher M Kramer
- Cardiovascular Division, University of Virginia Health System, Charlottesville (C.M.K.)
| | - Stefan Neubauer
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine (A.R.H., A.G., C.G., S.N., H.C.W.)
- NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, United Kingdom (S.N., H.C.W.)
| | - Hugh C Watkins
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine (A.R.H., A.G., C.G., S.N., H.C.W.)
- Wellcome Centre for Human Genetics, University of Oxford, United Kingdom (A.R.H., A.G., C.G., H.C.W.)
- NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, United Kingdom (S.N., H.C.W.)
| | - Steffen E Petersen
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry (N.A., S.v.D., S.E.P., P.B.M.)
- National Institute for Health and Care Research, Barts Cardiovascular Biomedical Research Centre, Queen Mary University of London (N.A., S.v.D., S.E.P., P.B.M.)
- Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, West Smithfield (N.A., L.R.L., S.E.P.)
| | - Patricia B Munroe
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry (N.A., S.v.D., S.E.P., P.B.M.)
- National Institute for Health and Care Research, Barts Cardiovascular Biomedical Research Centre, Queen Mary University of London (N.A., S.v.D., S.E.P., P.B.M.)
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Jones AC, Patki A, Claas SA, Tiwari HK, Chaudhary NS, Absher DM, Lange LA, Lange EM, Zhao W, Ratliff SM, Kardia SLR, Smith JA, Irvin MR, Arnett DK. Differentially Methylated DNA Regions and Left Ventricular Hypertrophy in African Americans: A HyperGEN Study. Genes (Basel) 2022; 13:genes13101700. [PMID: 36292585 PMCID: PMC9601679 DOI: 10.3390/genes13101700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 09/15/2022] [Accepted: 09/20/2022] [Indexed: 11/16/2022] Open
Abstract
Left ventricular (LV) hypertrophy (LVH) is an independent risk factor for cardiovascular disease, and African Americans experience a disparate high risk of LVH. Genetic studies have identified potential candidate genes and variants related to the condition. Epigenetic modifications may continue to help unravel disease mechanisms. We used methylation and echocardiography data from 636 African Americans selected from the Hypertension Genetic Epidemiology Network (HyperGEN) to identify differentially methylated regions (DMRs) associated with LVH. DNA extracted from whole blood was assayed on Illumina Methyl450 arrays. We fit linear mixed models to examine associations between co-methylated regions and LV traits, and we then conducted single CpG analyses within significant DMRs. We identified associations between DMRs and ejection fraction (XKR6), LV internal diastolic dimension (TRAK1), LV mass index (GSE1, RPS15 A, PSMD7), and relative wall thickness (DNHD1). In single CpG analysis, CpG sites annotated to TRAK1 and DNHD1 were significant. These CpGs were not associated with LV traits in replication cohorts but the direction of effect for DNHD1 was consistent across cohorts. Of note, DNHD1, GSE1, and PSMD7 may contribute to cardiac structural function. Future studies should evaluate relationships between regional DNA methylation patterns and the development of LVH.
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Affiliation(s)
- Alana C. Jones
- Department of Epidemiology, School of Public Health, University of Alabama-Birmingham, Birmingham, AL 35233, USA
| | - Amit Patki
- Department of Biostatistics, School of Public Health, University of Alabama-Birmingham, Birmingham, AL 35233, USA
| | - Steven A. Claas
- Department of Epidemiology, College of Public Health, University of Kentucky, Lexington, KY 40506, USA
| | - Hemant K. Tiwari
- Department of Biostatistics, School of Public Health, University of Alabama-Birmingham, Birmingham, AL 35233, USA
| | - Ninad S. Chaudhary
- Department of Epidemiology, School of Public Health, University of Alabama-Birmingham, Birmingham, AL 35233, USA
- Department of Epidemiology, Human Genetics, and Environmental Sciences, School of Public Health, University of Texas Health Science Center, Houston, TX 77030, USA
| | - Devin M. Absher
- Hudson Alpha Institute of Biotechnology, Huntsville, AL 35806, USA
| | - Leslie A. Lange
- Department of Epidemiology, School of Public Health, University of Colorado, Aurora, CO 80045, USA
- Department of Biomedical Informatics, School of Medicine, University of Colorado, Aurora, CO 80045, USA
| | - Ethan M. Lange
- Department of Biomedical Informatics, School of Medicine, University of Colorado, Aurora, CO 80045, USA
- Department of Biostatistics and Informatics, School of Public Health, University of Colorado, Aurora, CO 80045, USA
| | - Wei Zhao
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA
| | - Scott M. Ratliff
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA
| | - Sharon L. R. Kardia
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jennifer A. Smith
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA
| | - Marguerite R. Irvin
- Department of Epidemiology, School of Public Health, University of Alabama-Birmingham, Birmingham, AL 35233, USA
- Correspondence:
| | - Donna K. Arnett
- Department of Epidemiology, College of Public Health, University of Kentucky, Lexington, KY 40506, USA
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Irvin MR, Aggarwal P, Claas SA, de las Fuentes L, Do AN, Gu CC, Matter A, Olson BS, Patki A, Schwander K, Smith JD, Srinivasasainagendra V, Tiwari HK, Turner AJ, Nickerson DA, Rao DC, Broeckel U, Arnett DK. Whole-Exome Sequencing and hiPSC Cardiomyocyte Models Identify MYRIP, TRAPPC11, and SLC27A6 of Potential Importance to Left Ventricular Hypertrophy in an African Ancestry Population. Front Genet 2021; 12:588452. [PMID: 33679876 PMCID: PMC7933688 DOI: 10.3389/fgene.2021.588452] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 01/11/2021] [Indexed: 11/18/2022] Open
Abstract
Background: Indices of left ventricular (LV) structure and geometry represent useful intermediate phenotypes related to LV hypertrophy (LVH), a predictor of cardiovascular (CV) disease (CVD) outcomes. Methods and Results: We conducted an exome-wide association study of LV mass (LVM) adjusted to height2.7, LV internal diastolic dimension (LVIDD), and relative wall thickness (RWT) among 1,364 participants of African ancestry (AAs) in the Hypertension Genetic Epidemiology Network (HyperGEN). Both single-variant and gene-based sequence kernel association tests were performed to examine whether common and rare coding variants contribute to variation in echocardiographic traits in AAs. We then used a data-driven procedure to prioritize and select genes for functional validation using a human induced pluripotent stem cell cardiomyocyte (hiPSC-CM) model. Three genes [myosin VIIA and Rab interacting protein (MYRIP), trafficking protein particle complex 11 (TRAPPC11), and solute carrier family 27 member 6 (SLC27A6)] were prioritized based on statistical significance, variant functional annotations, gene expression in the hiPSC-CM model, and prior biological evidence and were subsequently knocked down in the hiPSC-CM model. Expression profiling of hypertrophic gene markers in the knockdowns suggested a decrease in hypertrophic expression profiles. MYRIP knockdowns showed a significant decrease in atrial natriuretic factor (NPPA) and brain natriuretic peptide (NPPB) expression. Knockdowns of the heart long chain fatty acid (FA) transporter SLC27A6 resulted in downregulated caveolin 3 (CAV3) expression, which has been linked to hypertrophic phenotypes in animal models. Finally, TRAPPC11 knockdown was linked to deficient calcium handling. Conclusions: The three genes are biologically plausible candidates that provide new insight to hypertrophic pathways.
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Affiliation(s)
- Marguerite R. Irvin
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Praful Aggarwal
- Department of Pediatrics, Children’s Research Institute, Genomic Sciences and Precision Medicine Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Steven A. Claas
- College of Public Health, University of Kentucky, Lexington, KY, United States
| | - Lisa de las Fuentes
- Cardiovascular Division, Department of Medicine and Division of Biostatistics, Washington University, St. Louis, MO, United States
| | - Anh N. Do
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL, United States
| | - C. Charles Gu
- Division of Biostatistics, Washington University, St. Louis, MO, United States
| | - Andrea Matter
- Department of Pediatrics, Children’s Research Institute, Genomic Sciences and Precision Medicine Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Benjamin S. Olson
- Department of Pediatrics, Children’s Research Institute, Genomic Sciences and Precision Medicine Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Amit Patki
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Karen Schwander
- Division of Biostatistics, Washington University, St. Louis, MO, United States
| | - Joshua D. Smith
- Department of Genome Sciences, University of Washington, Seattle, WA, United States
| | | | - Hemant K. Tiwari
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Amy J. Turner
- Department of Pediatrics, Children’s Research Institute, Genomic Sciences and Precision Medicine Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Deborah A. Nickerson
- Department of Genome Sciences, University of Washington, Seattle, WA, United States
| | - Dabeeru C. Rao
- Division of Biostatistics, Washington University, St. Louis, MO, United States
| | - Ulrich Broeckel
- Department of Pediatrics, Children’s Research Institute, Genomic Sciences and Precision Medicine Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Donna K. Arnett
- College of Public Health, University of Kentucky, Lexington, KY, United States
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Tran TT, Mai TP, Tran HCB, Le LHG, Vu HA, Tran TK, Hoang SV, Chau HN, Do MD. Association Between AGT M235T and Left Ventricular Mass in Vietnamese Patients Diagnosed With Essential Hypertension. Front Cardiovasc Med 2021; 8:608948. [PMID: 33681303 PMCID: PMC7933009 DOI: 10.3389/fcvm.2021.608948] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 01/06/2021] [Indexed: 12/14/2022] Open
Abstract
Background: Increasing left ventricular mass in hypertensive patients is an independent prognostic marker for adverse cardiovascular outcomes. Genetic factors have been shown to critically affect left ventricular mass. AGT M235T is one of the genetic polymorphisms that may influence left ventricular mass due to its pivotal role in the regulation of plasma angiotensinogen level as well as hypertension pathophysiology in Asian populations. Currently, how M235T affects left ventricular mass is not well-described in Vietnamese hypertensive patients. This study aimed to investigate the association between M235T and left ventricular mass in Vietnamese patients diagnosed with essential hypertension. Materials and Methods: AGT M235T genotyping and 2D echocardiography were performed on 187 Vietnamese subjects with essential hypertension. All the ultrasound parameters were obtained to calculate the left ventricular mass index according to the American Society of Echocardiography and the European Association of Cardiovascular Imaging 2015 guidelines. Other clinical characteristics were also recorded, including age, gender, duration of hypertension, hypertensive treatment, lifestyle, renal function, fasting plasma glucose, and lipid profile. Results: MT and TT genotypes were determined in 30 and 157 subjects, respectively. AGT M235T genotype, duration of hypertension, body mass index, and ejection fraction statistically affected the left ventricular mass index, which was significantly greater in TT compared to MT carriers after adjusting for confounding factors. Conclusion: The TT genotype of AGT M23T was associated with greater left ventricular mass in Vietnamese patients diagnosed with essential hypertension.
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Affiliation(s)
- Tuan Thanh Tran
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thao Phuong Mai
- Department of Physiology-Pathophysiology-Immunology, Faculty of Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Ha Chau Bich Tran
- Center for Cardiovascular Medicine, University Medical Center, Ho Chi Minh City, Vietnam
| | - Linh Hoang Gia Le
- Center for Molecular Biomedicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Hoang Anh Vu
- Center for Molecular Biomedicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Trang Kim Tran
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Sy Van Hoang
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Hoa Ngoc Chau
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Minh Duc Do
- Center for Molecular Biomedicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
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Wu Y, Liu X, Zheng H, Zhu H, Mai W, Huang X, Huang Y. Multiple Roles of sFRP2 in Cardiac Development and Cardiovascular Disease. Int J Biol Sci 2020; 16:730-738. [PMID: 32071544 PMCID: PMC7019133 DOI: 10.7150/ijbs.40923] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Accepted: 12/14/2019] [Indexed: 12/13/2022] Open
Abstract
The Wnt signaling pathway plays important roles in organ development and disease processes. Secreted frizzled-related protein 2 (sFRP2), a vital molecule of Wnt signaling, can regulate cardiac development and cardiovascular disease. Recent studies have suggested that sFRP2 is not only an antagonist of the canonical Wnt signaling pathway, but also has a more complex relationship in myocardial fibrosis, angiogenesis, cardiac hypertrophy and cardiac regeneration. Here, we review the role of sFRP2 and Wnt signaling in cardiac development and cardiovascular disease.
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Affiliation(s)
- Yu Wu
- Department of Cardiology, Shunde hospital, Southern Medical University, Jiazi Road 1 Lunjiao Town, Shunde District, Foshan, Guangdong, 528308, China
| | - Xinyue Liu
- Department of Cardiology, Shunde hospital, Southern Medical University, Jiazi Road 1 Lunjiao Town, Shunde District, Foshan, Guangdong, 528308, China
| | - Haoxiao Zheng
- Department of Cardiology, Shunde hospital, Southern Medical University, Jiazi Road 1 Lunjiao Town, Shunde District, Foshan, Guangdong, 528308, China
| | - Hailan Zhu
- Department of Cardiology, Shunde hospital, Southern Medical University, Jiazi Road 1 Lunjiao Town, Shunde District, Foshan, Guangdong, 528308, China
| | - Weiyi Mai
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, 510080, Guangzhou
| | - Xiaohui Huang
- Department of Cardiology, Shunde hospital, Southern Medical University, Jiazi Road 1 Lunjiao Town, Shunde District, Foshan, Guangdong, 528308, China
| | - Yuli Huang
- Department of Cardiology, Shunde hospital, Southern Medical University, Jiazi Road 1 Lunjiao Town, Shunde District, Foshan, Guangdong, 528308, China.,The George Institute for Global Health, NSW 2042 Australia
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The sirtuin1 gene associates with left ventricular myocardial hypertrophy and remodeling in two chronic kidney disease cohorts: a longitudinal study. J Hypertens 2019; 36:1705-1711. [PMID: 29702498 DOI: 10.1097/hjh.0000000000001746] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND Oxidative stress and inflammation are major drivers of myocardial hypertrophy in chronic kidney disease (CKD). The silent information regulator gene 1 (Sirt1) is a fundamental mediator of the response to oxidative stress and inflammation and promotes myocardial growth under stress conditions; therefore, it may contribute to myocardial hypertrophy and concentric remodeling of the left ventricle (LV) in CKD. METHODS We investigated the cross-sectional and longitudinal relationship between three candidate polymorphisms in the Sirt1 gene and LV parameters in two cohorts of CKD patients including 235 stage G5D patients and 179 stages G1-5 patients, respectively. RESULTS In both cohorts, the C allele of the Sirt1 rs7069102 polymorphism associated with the posterior wall thickness in separate and combined analyses (beta = 0.15, P = 2 × 10) but was unrelated with the LV volume and the LV mass index indicating a peculiar association of this allele with LV concentric remodeling. Accordingly, the same allele was linked with the LV mass-to-volume ratio in separate and combined (beta = 0.14, P = 2 × 10) analyses in the same cohorts. Furthermore, in longitudinal analyses patients harboring the C allele showed a more pronounced increase in LV mass-to-volume ratio over time than patients without such an allele (regression coefficient = 0.14, 95% confidence interval: 0.05-0.23; P = 3 × 10 in the combined analysis). CONCLUSION The rs7069102 polymorphism in the Sirt1 gene is associated with LV concentric remodeling in two independent cohorts of stages G5D and G1-5 CKD patients. These results offer a genetic basis to the hypothesis that the Sirt1 gene plays a causal role in myocardial hypertrophy and LV concentric remodeling in these patients.
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Tan CMJ, Green P, Tapoulal N, Lewandowski AJ, Leeson P, Herring N. The Role of Neuropeptide Y in Cardiovascular Health and Disease. Front Physiol 2018; 9:1281. [PMID: 30283345 PMCID: PMC6157311 DOI: 10.3389/fphys.2018.01281] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 08/24/2018] [Indexed: 12/20/2022] Open
Abstract
Neuropeptide Y (NPY) is an abundant sympathetic co-transmitter, widely found in the central and peripheral nervous systems and with diverse roles in multiple physiological processes. In the cardiovascular system it is found in neurons supplying the vasculature, cardiomyocytes and endocardium, and is involved in physiological processes including vasoconstriction, cardiac remodeling, and angiogenesis. It is increasingly also implicated in cardiovascular disease pathogenesis, including hypertension, atherosclerosis, ischemia/infarction, arrhythmia, and heart failure. This review will focus on the physiological and pathogenic role of NPY in the cardiovascular system. After summarizing the NPY receptors which predominantly mediate cardiovascular actions, along with their signaling pathways, individual disease processes will be considered. A thorough understanding of these roles may allow therapeutic targeting of NPY and its receptors.
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Affiliation(s)
- Cheryl M J Tan
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Peregrine Green
- Department of Physiology, Anatomy and Genetics, Burdon Sanderson Cardiac Science Centre, University of Oxford, Oxford, United Kingdom
| | - Nidi Tapoulal
- Department of Physiology, Anatomy and Genetics, Burdon Sanderson Cardiac Science Centre, University of Oxford, Oxford, United Kingdom
| | - Adam J Lewandowski
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Paul Leeson
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Neil Herring
- Department of Physiology, Anatomy and Genetics, Burdon Sanderson Cardiac Science Centre, University of Oxford, Oxford, United Kingdom
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9
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Bruneau M, Walsh S, Selinsky E, Ash G, Angelopoulos TJ, Clarkson P, Gordon P, Moyna N, Visich P, Zoeller R, Thompson P, Gordish‐Dressman H, Hoffman E, Devaney J, Pescatello LS. A genetic variant in IL-15Rα correlates with physical activity among European-American adults. Mol Genet Genomic Med 2018; 6:401-408. [PMID: 29624921 PMCID: PMC6014439 DOI: 10.1002/mgg3.368] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Revised: 12/08/2017] [Accepted: 12/27/2017] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Interleukin-15 (IL-15) is a myokine associated with muscle strength, possibly by attenuating protein breakdown. A variant in the alpha-receptor (IL-15Rα 1775 A>C, rs2228059) partially modulates the muscle strength and size response to resistance training. We examined if this polymorphism associated with habitual physical activity among European-American adults. METHODS Men (n = 240, 23.7 ± 0.3 year, body mass index [BMI] 25.3 ± 0.3 kg/m2 ) and women (n = 292, 23.2 ± 0.3 year, 24.0 ± 0.3 kg/m2 ) were genotyped. Physical activity phenotypes were derived from the Paffenbarger Physical Activity Questionnaire. Analysis of covariance (ancova) tested log-transformed differences between the IL-15Rα genotype and physical activity phenotypes by gender with age and BMI as covariates. RESULTS Men with the IL-15Rα 1775AA genotype spent more time in light intensity physical activity (39.4 ± 2.4 hr/week) than men with the CC genotype (28.6 ± 2.3 hr/week, (p = .009). CONCLUSION Further research is needed to confirm our finding and determine the possible mechanisms by which the IL-15Rα variant modulates light intensity physical activity.
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Affiliation(s)
| | - Sean Walsh
- Central Connecticut State UniversityNew BritainCTUSA
| | | | | | | | | | | | | | | | | | | | | | - Eric Hoffman
- Cooperative International Neuromuscular Research GroupWashingtonDCUSA
| | | | - Linda S. Pescatello
- University of ConnecticutStorrsCTUSA
- University of Connecticut Institute for Systems GenomicsStorrsCTUSA
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10
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Silva CT, Zorkoltseva IV, Niemeijer MN, van den Berg ME, Amin N, Demirkan A, van Leeuwen E, Iglesias AI, Piñeros-Hernández LB, Restrepo CM, Kors JA, Kirichenko AV, Willemsen R, Oostra BA, Stricker BH, Uitterlinden AG, Axenovich TI, van Duijn CM, Isaacs A. A combined linkage, microarray and exome analysis suggests MAP3K11 as a candidate gene for left ventricular hypertrophy. BMC Med Genomics 2018; 11:22. [PMID: 29506515 PMCID: PMC5838853 DOI: 10.1186/s12920-018-0339-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 02/21/2018] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Electrocardiographic measures of left ventricular hypertrophy (LVH) are used as predictors of cardiovascular risk. We combined linkage and association analyses to discover novel rare genetic variants involved in three such measures and two principal components derived from them. METHODS The study was conducted among participants from the Erasmus Rucphen Family Study (ERF), a Dutch family-based sample from the southwestern Netherlands. Variance components linkage analyses were performed using Merlin. Regions of interest (LOD > 1.9) were fine-mapped using microarray and exome sequence data. RESULTS We observed one significant LOD score for the second principal component on chromosome 15 (LOD score = 3.01) and 12 suggestive LOD scores. Several loci contained variants identified in GWAS for these traits; however, these did not explain the linkage peaks, nor did other common variants. Exome sequence data identified two associated variants after multiple testing corrections were applied. CONCLUSIONS We did not find common SNPs explaining these linkage signals. Exome sequencing uncovered a relatively rare variant in MAPK3K11 on chromosome 11 (MAF = 0.01) that helped account for the suggestive linkage peak observed for the first principal component. Conditional analysis revealed a drop in LOD from 2.01 to 0.88 for MAP3K11, suggesting that this variant may partially explain the linkage signal at this chromosomal location. MAP3K11 is related to the JNK pathway and is a pro-apoptotic kinase that plays an important role in the induction of cardiomyocyte apoptosis in various pathologies, including LVH.
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Affiliation(s)
- Claudia Tamar Silva
- Genetic Epidemiology Unit, Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands
- Center for Research in Genetics and Genomics (CIGGUR), Institute of Translational Medicine (IMT), GENIUROS Research group, School of Medicine and Health Science, Universidad del Rosario, Bogotá, Colombia
- Doctoral Program in Biomedical Sciences, Universidad del Rosario, Bogotá, Colombia
| | | | - Maartje N. Niemeijer
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Marten E. van den Berg
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Najaf Amin
- Genetic Epidemiology Unit, Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Ayşe Demirkan
- Genetic Epidemiology Unit, Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Elisa van Leeuwen
- Genetic Epidemiology Unit, Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Adriana I. Iglesias
- Genetic Epidemiology Unit, Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands
- Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Laura B. Piñeros-Hernández
- Center for Research in Genetics and Genomics (CIGGUR), Institute of Translational Medicine (IMT), GENIUROS Research group, School of Medicine and Health Science, Universidad del Rosario, Bogotá, Colombia
| | - Carlos M. Restrepo
- Center for Research in Genetics and Genomics (CIGGUR), Institute of Translational Medicine (IMT), GENIUROS Research group, School of Medicine and Health Science, Universidad del Rosario, Bogotá, Colombia
| | - Jan A. Kors
- Department of Medical Informatics, Erasmus University Medical Center, Rotterdam, the Netherlands
| | | | - Rob Willemsen
- Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Ben A. Oostra
- Genetic Epidemiology Unit, Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands
- Center for Medical Systems Biology, Leiden, the Netherlands
| | - Bruno H. Stricker
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands
- Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, the Netherlands
- Inspectorate of Health care, The Hague, the Netherlands
| | - André G. Uitterlinden
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands
- Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, the Netherlands
| | | | - Cornelia M. van Duijn
- Genetic Epidemiology Unit, Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands
- Center for Medical Systems Biology, Leiden, the Netherlands
| | - Aaron Isaacs
- Genetic Epidemiology Unit, Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands
- CARIM School for Cardiovascular Diseases, Maastricht Centre for Systems Biology (MaCSBio), and Department of Biochemistry, Maastricht University, Maastricht, the Netherlands
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11
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Do AN, Zhao W, Srinivasasainagendra V, Aslibekyan S, Tiwari HK, Limdi N, Shah SJ, Zhi D, Broeckel U, Gu CC, Rao DC, Schwander K, Smith JA, Kardia SL, Arnett DK, Irvin MR. Whole exome analyses to examine the impact of rare variants on left ventricular traits in African American participants from the HyperGEN and GENOA studies. JOURNAL OF HYPERTENSION AND MANAGEMENT 2017; 3:025. [PMID: 29503979 PMCID: PMC5831560 DOI: 10.23937/2474-3690/1510025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Left ventricular (LV) hypertrophy, highest in prevalence among African Americans, is an established risk factor heart failure. Several genome wide association studies have identified common variants associated with LV-related quantitative-traits in African Americans. To date, however, the effect of rare variants on these traits has not been extensively studied, especially in minority groups. We therefore investigated the association between rare variants and LV traits among 1,934 African Americans using exome chip data from the Hypertension Genetic Epidemiology Network (HyperGEN) study, with replication in 1,090 African American from the Genetic Epidemiology Network of Arteriopathy (GENOA) study. We used single-variant analyses and gene-based tests to investigate the association between 86,927 variants and six structural and functional LV traits including LV mass, LV internal dimension-diastole, relative wall thickness, left atrial dimension (LAD), fractional shortening (FS), and the ratio of LV early-to-late transmitral velocity (E/A ratio). Only rare variants (MAF <1% and <5%) were considered in gene-based analyses. In gene-based analyses, we found a statistically significant association between potassium voltage-gated channel subfamily H member 4 (KCNH4) and E/A ratio (P=8.7*10-8 using a burden test). Endonuclease G (ENDOG) was associated with LAD using the Madsen Browning weighted burden (MB) test (P=1.4*10-7). Neither gene result was replicated in GENOA, but the direction of effect of single variants in common was comparable. G protein-coupled receptor 55 (GPR55) was marginally associated with LAD in HyperGEN (P=3.2*10-5 using the MB test) and E/A ratio in GENOA, but with opposing directions of association for variants in common (P=0.03 for the MB test). No single variant was statistically significantly associated with any trait after correcting for multiple testing. The findings in this study highlight the potential cumulative contributions of rare variants to LV traits which, if validated, could improve our understanding of heart failure in African Americans.
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Affiliation(s)
- Anh N. Do
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL
| | - Wei Zhao
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI
| | | | - Stella Aslibekyan
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL
| | - Hemant K. Tiwari
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL
| | - Nita Limdi
- Department of Neurology, University of Alabama at Birmingham, Birmingham, AL
| | - Sanjiv J. Shah
- Division of Cardiology, Department of Medicine, Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Degui Zhi
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL
| | - Uli Broeckel
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI
| | - C. Charles Gu
- Division of Biostatistics, Washington University in St. Louis, St. Louis, MO
| | - DC Rao
- Division of Biostatistics, Washington University in St. Louis, St. Louis, MO
| | - Karen Schwander
- Division of Biostatistics, Washington University in St. Louis, St. Louis, MO
| | - Jennifer A. Smith
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI
| | - Sharon L.R. Kardia
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI
| | - Donna K. Arnett
- College of Public Health, University of Kentucky, Lexington, KY
| | - Marguerite R. Irvin
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL
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12
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Adeoye AM, Ovbiagele B, Kolo P, Appiah L, Aje A, Adebayo O, Sarfo F, Akinyemi J, Adekunle G, Agyekum F, Shidali V, Ogah O, Lackland D, Gebregziabher M, Arnett D, Tiwari HK, Akinyemi R, Olagoke OO, Oguntade AS, Olunuga T, Uwanruochi K, Jenkins C, Adadey P, Iheonye H, Owolabi L, Obiako R, Akinjopo S, Armstrong K, Akpalu A, Fakunle A, Saulson R, Aridegbe M, Olowoyo P, Osaigbovo G, Akpalu J, Fawale B, Adebayo P, Arulogun O, Ibinaiye P, Agunloye A, Ishaq N, Wahab K, Akpa O, Adeleye O, Bock-Oruma A, Ogbole G, Melikam S, Yaria J, Ogunjimi L, Salaam A, Sunmonu T, Makanjuola A, Farombi T, Laryea R, Uvere E, Kehinde S, Chukwuonye I, Azuh P, Komolafe M, Akintunde A, Obiabo O, Areo O, Kehinde I, Amusa AG, Owolabi M. Exploring Overlaps Between the Genomic and Environmental Determinants of LVH and Stroke: A Multicenter Study in West Africa. Glob Heart 2017; 12:107-113.e5. [PMID: 28302552 DOI: 10.1016/j.gheart.2017.01.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 01/05/2017] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Whether left ventricular hypertrophy (LVH) is determined by similar genomic and environmental risk factors with stroke, or is simply an intermediate stroke marker, is unknown. OBJECTIVES We present a research plan and preliminary findings to explore the overlap in the genomic and environmental determinants of LVH and stroke among Africans participating in the SIREN (Stroke Investigative Research and Education Network) study. METHODS SIREN is a transnational, multicenter study involving acute stroke patients and age-, ethnicity-, and sex-matched control subjects recruited from 9 sites in Ghana and Nigeria. Genomic and environmental risk factors and other relevant phenotypes for stroke and LVH are being collected and compared using standard techniques. RESULTS This preliminary analysis included only 725 stroke patients (mean age 59.1 ± 13.2 years; 54.3% male). Fifty-five percent of the stroke subjects had LVH with greater proportion among women (51.6% vs. 48.4%; p < 0.001). Those with LVH were younger (57.9 ± 12.8 vs. 60.6 ± 13.4; p = 0.006) and had higher mean systolic and diastolic blood pressure (167.1/99.5 mm Hg vs 151.7/90.6 mm Hg; p < 0.001). Uncontrolled blood pressure at presentation was prevalent in subjects with LVH (76.2% vs. 57.7%; p < 0.001). Significant independent predictors of LVH were age <45 years (adjusted odds ratio [AOR]: 1.91; 95% confidence interval [CI]: 1.14 to 3.19), female sex (AOR: 2.01; 95% CI: 1.44 to 2.81), and diastolic blood pressure > 90 mm Hg (AOR: 2.10; 95% CI: 1.39 to 3.19; p < 0.001). CONCLUSIONS The prevalence of LVH was high among stroke patients especially the younger ones, suggesting a genetic component to LVH. Hypertension was a major modifiable risk factor for stroke as well as LVH. It is envisaged that the SIREN project will elucidate polygenic overlap (if present) between LVH and stroke among Africans, thereby defining the role of LVH as a putative intermediate cardiovascular phenotype and therapeutic target to inform interventions to reduce stroke risk in populations of African ancestry.
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Affiliation(s)
| | | | - Philip Kolo
- University of Ilorin Teaching Hospital, Ilorin, Nigeria
| | | | | | | | - Fred Sarfo
- Komfo Anokye Teaching Hospital, Kumasi, Ghana
| | | | | | | | | | | | - Dan Lackland
- Medical University of South Carolina, Charleston, SC, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Raelle Saulson
- Medical University of South Carolina, Charleston, SC, USA
| | | | - Paul Olowoyo
- Federal University Teaching Hospital, Ido-Ekiti, Nigeria
| | | | | | - Bimbo Fawale
- Obafemi Awolowo University Teaching Hospital, Ile-Ife, Nigeria
| | - Philip Adebayo
- Ladoke Akintola University of Technology, Ogbomoso, Nigeria
| | | | | | | | | | | | | | - Omisore Adeleye
- Obafemi Awolowo University Teaching Hospital, Ile-Ife, Nigeria
| | | | | | | | | | | | | | | | | | | | - Ruth Laryea
- University of Ghana Medical School, Accra, Ghana
| | | | | | | | | | | | | | - Olugbo Obiabo
- Delta State University Teaching Hospital, Ogara, Nigeria
| | - Olusegun Areo
- Federal University Teaching Hospital, Ido-Ekiti, Nigeria
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13
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Saraf R, Mahmood F, Amir R, Matyal R. Neuropeptide Y is an angiogenic factor in cardiovascular regeneration. Eur J Pharmacol 2016; 776:64-70. [PMID: 26875634 DOI: 10.1016/j.ejphar.2016.02.033] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 01/27/2016] [Accepted: 02/09/2016] [Indexed: 12/13/2022]
Abstract
In diabetic cardiomyopathy, there is altered angiogenic signaling and increased oxidative stress. As a result, anti-angiogenic and pro-inflammatory pathways are activated. These disrupt cellular metabolism and cause fibrosis and apoptosis, leading to pathological remodeling. The autonomic nervous system and neurotransmitters play an important role in angiogenesis. Therapies that promote angiogenesis may be able to relieve the pathology in these disease states. Neuropeptide Y (NPY) is the most abundantly produced and expressed neuropeptide in the central and peripheral nervous systems in mammals and plays an important role in promoting angiogenesis and cardiomyocyte remodeling. It produces effects through G-protein-coupled Y receptors that are widely distributed and also present on the myocardium. Some of these receptors are also involved in diseased states of the heart. NPY has been implicated as a potent growth factor, causing cell proliferation in multiple systems while the NPY3-36 fragment is selective in stimulating angiogenesis and cardiomyocyte remodeling. Current research is focusing on developing a drug delivery mechanism for NPY to prolong therapy without having significant systemic consequences. This could be a promising innovation in the treatment of diabetic cardiomyopathy and ischemic heart disease.
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Affiliation(s)
- Rabya Saraf
- Department of Surgery, Division of Cardiac Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
| | - Feroze Mahmood
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
| | - Rabia Amir
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
| | - Robina Matyal
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States.
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14
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Chauvet C, Crespo K, Shi Y, Gelinas D, Duval F, L'Heureux N, Nattel S, Tardif JC, Deng AY. Unique Quantitative Trait Loci in Synergy Permanently Improve Diastolic Dysfunction. Can J Cardiol 2013; 29:1302-9. [DOI: 10.1016/j.cjca.2013.03.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 03/11/2013] [Accepted: 03/11/2013] [Indexed: 10/26/2022] Open
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15
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Heredity and cardiometabolic risk: naturally occurring polymorphisms in the human neuropeptide Y(2) receptor promoter disrupt multiple transcriptional response motifs. J Hypertens 2013; 31:123-33. [PMID: 23149563 DOI: 10.1097/hjh.0b013e32835b053d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
OBJECTIVES The neuropeptide Y(2) G-protein-coupled receptor (NPY2R) relays signals from PYY or neuropeptide Y toward satiety and control of body mass. Targeted ablation of the NPY2R locus in mice yields obesity, and studies of NPY2R promoter genetic variation in more than 10,000 human participants indicate its involvement in control of obesity and BMI. Here we searched for genetic variation across the human NPY2R locus and probed its functional effects, especially in the proximal promoter. METHODS AND RESULTS Twin pair studies indicated substantial heritability for multiple cardiometabolic traits, including BMI, SBP, DBP, and PYY, an endogenous agonist at NPY2R. Systematic polymorphism discovery by resequencing across NPY2R uncovered 21 genetic variants, 10 of which were common [minor allele frequency (MAF) >5%], creating one to two linkage disequilibrium blocks in multiple biogeographic ancestries. In vivo, NPY2R haplotypes were associated with both BMI (P = 3.75E-04) and PYY (P = 4.01E-06). Computational approaches revealed that proximal promoter variants G-1606A, C-599T, and A-224G disrupt predicted IRF1 (A>G), FOXI1 (T>C), and SNAI1 (A>G) response elements. In neuroendocrine cells transfected with NPY2R promoter/luciferase reporter plasmids, all three variants and their resulting haplotypes influenced transcription (G-1606A, P < 2.97E-06; C-599T, P < 1.17E-06; A-224G, P < 2.04E-06), and transcription was differentially augmented or impaired by coexpression of either the cognate full-length transcription factors or their specific siRNAs at each site. Endogenous expression of transcripts for NPY2R, IRF1, and SNAI1 was documented in neuroendocrine cells, and the NPY2R mRNA was differentially expressed in two neuroendocrine tissues (adrenal gland, brainstem) of a rodent model of hypertension and the metabolic syndrome, the spontaneously hypertensive rat. CONCLUSION We conclude that common genetic variation in the proximal NPY2R promoter influences transcription factor binding so as to alter gene expression in neuroendocrine cells, and consequently cardiometabolic traits in humans. These results unveil a novel control point, whereby cis-acting genetic variation contributes to control of complex cardiometabolic traits, and point to new transcriptional strategies for intervention into neuropeptide actions and their cardiometabolic consequences.
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16
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Hersch M, Peter B, Kang HM, Schüpfer F, Abriel H, Pedrazzini T, Eskin E, Beckmann JS, Bergmann S, Maurer F. Mapping genetic variants associated with beta-adrenergic responses in inbred mice. PLoS One 2012; 7:e41032. [PMID: 22859963 PMCID: PMC3409184 DOI: 10.1371/journal.pone.0041032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Accepted: 06/16/2012] [Indexed: 01/11/2023] Open
Abstract
β-blockers and β-agonists are primarily used to treat cardiovascular diseases. Inter-individual variability in response to both drug classes is well recognized, yet the identity and relative contribution of the genetic players involved are poorly understood. This work is the first genome-wide association study (GWAS) addressing the values and susceptibility of cardiovascular-related traits to a selective β1-blocker, Atenolol (ate), and a β-agonist, Isoproterenol (iso). The phenotypic dataset consisted of 27 highly heritable traits, each measured across 22 inbred mouse strains and four pharmacological conditions. The genotypic panel comprised 79922 informative SNPs of the mouse HapMap resource. Associations were mapped by Efficient Mixed Model Association (EMMA), a method that corrects for the population structure and genetic relatedness of the various strains. A total of 205 separate genome-wide scans were analyzed. The most significant hits include three candidate loci related to cardiac and body weight, three loci for electrocardiographic (ECG) values, two loci for the susceptibility of atrial weight index to iso, four loci for the susceptibility of systolic blood pressure (SBP) to perturbations of the β-adrenergic system, and one locus for the responsiveness of QTc (p<10−8). An additional 60 loci were suggestive for one or the other of the 27 traits, while 46 others were suggestive for one or the other drug effects (p<10−6). Most hits tagged unexpected regions, yet at least two loci for the susceptibility of SBP to β-adrenergic drugs pointed at members of the hypothalamic-pituitary-thyroid axis. Loci for cardiac-related traits were preferentially enriched in genes expressed in the heart, while 23% of the testable loci were replicated with datasets of the Mouse Phenome Database (MPD). Altogether these data and validation tests indicate that the mapped loci are relevant to the traits and responses studied.
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Affiliation(s)
- Micha Hersch
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Bastian Peter
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Hyun Min Kang
- Department of Computer Science and Department of Human Genetics, University of California Los Angeles, Los Angeles, California, United States of America
- Department of Biostatistics, Center for Statistical Genetics, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Fanny Schüpfer
- Service of Medical Genetics, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - Hugues Abriel
- Department of Clinical Research, University of Bern, Bern, Switzerland
| | - Thierry Pedrazzini
- Department of Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - Eleazar Eskin
- Department of Computer Science and Department of Human Genetics, University of California Los Angeles, Los Angeles, California, United States of America
| | - Jacques S. Beckmann
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
- Service of Medical Genetics, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - Sven Bergmann
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Fabienne Maurer
- Service of Medical Genetics, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
- * E-mail:
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17
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Zhi D, Irvin MR, Gu CC, Stoddard AJ, Lorier R, Matter A, Rao DC, Srinivasasainagendra V, Tiwari HK, Turner A, Broeckel U, Arnett DK. Whole-exome sequencing and an iPSC-derived cardiomyocyte model provides a powerful platform for gene discovery in left ventricular hypertrophy. Front Genet 2012; 3:92. [PMID: 22654895 PMCID: PMC3361011 DOI: 10.3389/fgene.2012.00092] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Accepted: 05/08/2012] [Indexed: 11/13/2022] Open
Abstract
Rationale: Left ventricular hypertrophy (LVH) is a heritable predictor of cardiovascular disease, particularly in blacks. Objective: Determine the feasibility of combining evidence from two distinct but complementary experimental approaches to identify novel genetic predictors of increased LV mass. Methods: Whole-exome sequencing (WES) was conducted in seven African-American sibling trios ascertained on high average familial LV mass indexed to height (LVMHT) using Illumina HiSeq technology. Identified missense or nonsense (MS/NS) mutations were examined for association with LVMHT using linear mixed models adjusted for age, sex, body weight, and familial relationship. To functionally assess WES findings, human induced pluripotent stem cell-derived cardiomyocytes (induced pluripotent stem cell-CM) were stimulated to induce hypertrophy; mRNA sequencing (RNA-seq) was used to determine gene expression differences associated with hypertrophy onset. Statistically significant findings under both experimental approaches identified LVH candidate genes. Candidate genes were further prioritized by seven supportive criteria that included additional association tests (two criteria), regional linkage evidence in the larger HyperGEN cohort (one criterion), and publically available gene and variant based annotations (four criteria). Results: WES reads covered 91% of the target capture region (of size 37.2 MB) with an average coverage of 65×. WES identified 31,426 MS/NS mutations among the 21 individuals. A total of 295 MS/NS variants in 265 genes were associated with LVMHT with q-value <0.25. Of the 265 WES genes, 44 were differentially expressed (P < 0.05) in hypertrophied cells. Among the 44 candidate genes identified, 5, including HLA-B, HTT, MTSS1, SLC5A12, and THBS1, met 3 of 7 supporting criteria. THBS1 encodes an adhesive glycoprotein that promotes matrix preservation in pressure-overload LVH. THBS1 gene expression was 34% higher in hypertrophied cells (P = 0.0003) and a predicted conserved and damaging NS variant in exon 13 (A2099G) was significantly associated with LVHMT (P = 4 × 10−6). Conclusion: Combining evidence from cutting-edge genetic and cellular experiments can enable identification of novel LVH risk loci.
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Affiliation(s)
- D Zhi
- Department of Biostatistics, University of Alabama at Birmingham Birmingham, AL, USA
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18
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Shimbo D, Muntner P, Mann D, Barr RG, Tang W, Post W, Lima J, Burke G, Bluemke D, Shea S. Association of left ventricular hypertrophy with incident hypertension: the multi-ethnic study of atherosclerosis. Am J Epidemiol 2011; 173:898-905. [PMID: 21422061 DOI: 10.1093/aje/kwq509] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Increased left ventricular (LV) mass and changes in LV geometry may precede hypertension onset. The authors examined the associations of LV mass and geometry, assessed by cardiac magnetic resonance imaging, with hypertension incidence in 2,567 normotensive participants enrolled in 2000-2002 in the Multi-Ethnic Study of Atherosclerosis, an ethnically diverse, population-based, US study. Over a median follow-up of 4.8 years, 745 (29%) participants developed hypertension. In a fully adjusted model including baseline blood pressure, the relative risks of incident hypertension from the lowest to highest LV mass quartile were 1.00 (referent), 1.13 (95% confidence interval (CI): 0.89, 1.43), 1.28 (95% CI: 1.00, 1.63), and 1.78 (95% CI: 1.38, 2.30) (P < 0.001 for linear trend). Higher levels of LV concentric geometry, defined by higher LV mass to end-diastolic volume quartiles, were associated with higher risk of incident hypertension in a fully adjusted model (P = 0.044 for linear trend). In a final model containing both quartiles of LV mass and LV mass/volume along with all covariates including baseline blood pressure, higher LV mass quartiles were associated with incident hypertension (P < 0.001 for linear trend), whereas higher LV mass/volume quartiles were not (P = 0.643 for linear trend). In this multiethnic cohort, alterations in LV mass preceded hypertension onset among normotensive individuals.
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Affiliation(s)
- Daichi Shimbo
- Department of Medicine, Columbia University Medical Center, 622 West 168th Street, PH 9-949, New York, NY 10031, USA.
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19
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Increased left ventricular mass and decreased left ventricular systolic function have independent pathways to ventricular arrhythmogenesis in coronary artery disease. Heart Rhythm 2011; 8:1177-82. [PMID: 21376836 DOI: 10.1016/j.hrthm.2011.02.037] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Accepted: 02/25/2011] [Indexed: 01/19/2023]
Abstract
BACKGROUND Following myocardial infarction, individual patients can have wide variations in the extent of left ventricular systolic dysfunction (LVSD) and increased left ventricular (LV) mass. Both affect the risk for sudden cardiac death, but only LV ejection fraction is used for risk prediction. OBJECTIVE The purpose of this study was to evaluate the independent as well as the additive contributions of increased LV mass and decreased LV ejection fraction to sudden cardiac death in the general population. METHODS In the ongoing Oregon Sudden Unexpected Death Study, we studied consecutive SCD cases (n = 191) and coronary artery disease controls (n = 203) from the Portland, Oregon, metropolitan area (population approximately 1,000,000; 2002-2008). Comparisons of echocardiographic LV mass obtained prior and unrelated to sudden cardiac death (SCD) were conducted, and a logistic regression model was used to evaluate the relationship between SCD, severe LVSD, LV mass, and other relevant clinical variables. RESULTS In a multivariate model, both severe LVSD and left ventricular hypertrophy (LVH) were associated with increased SCD risk (odds ratio [OR] 1.9, 95% confidence interval [CI] 1.1-3.2 for severe LVSD; OR 1.8, 95% CI 1.1-2.9 for LVH). In patients with coexisting severe LVSD and LVH, risk of SCD was additive (OR 3.5, 95% CI 1.7-7.2). In the same model, increased age, atrial fibrillation/flutter, elevated creatinine, and diabetes independently increased risk, and use of angiotensin receptor blockers attenuated risk. CONCLUSION Reduced LV ejection fraction and increased LV mass had independent and additive effects on risk of sudden death. Despite the significant overlap between the two conditions, these findings point toward the existence of independent mechanistic pathways for ventricular arrhythmias that occur due to LVSD and LVH.
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Wineinger NE, Patki A, Meyers KJ, Broeckel U, Gu CC, Rao DC, Devereux RB, Arnett DK, Tiwari HK. Genome-wide joint SNP and CNV analysis of aortic root diameter in African Americans: the HyperGEN study. BMC Med Genomics 2011; 4:4. [PMID: 21223598 PMCID: PMC3027088 DOI: 10.1186/1755-8794-4-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2010] [Accepted: 01/11/2011] [Indexed: 01/29/2023] Open
Abstract
Background Aortic root diameter is a clinically relevant trait due to its known relationship with the pathogenesis of aortic regurgitation and risk for aortic dissection. African Americans are an understudied population despite a particularly high burden of cardiovascular diseases. We report a genome-wide association study on aortic root diameter among African Americans enrolled in the HyperGEN study. We invoked a two-stage, mixed model procedure to jointly identify SNP allele and copy number variation effects. Results Results suggest novel genetic contributors along a large region between the CRCP and KCTD7 genes on chromosome 7 (p = 4.26 × 10-7); and the SIRPA and PDYN genes on chromosome 20 (p = 3.28 × 10-8). Conclusions The regions we discovered are candidates for future studies on cardiovascular outcomes, particularly in African Americans. The methods we employed can also provide an outline for genetic researchers interested in jointly testing SNP and CNV effects and/or applying mixed model procedures on a genome-wide scale.
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Affiliation(s)
- Nathan E Wineinger
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL, USA.
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Neuropeptide Y receptor Y2 gene polymorphism interacts with plasma neuropeptide Y levels in predicting left ventricular hypertrophy in dialysis patients. J Hypertens 2010; 28:1745-51. [PMID: 20543711 DOI: 10.1097/hjh.0b013e32833bd21b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Neuropeptide Y (NPY) is a sympathetic neurotransmitter that acts on multiple receptors involved in cardiovascular remodelling and angiogenesis. Plasma levels of NPY are increased in patients with end-stage renal disease (ESRD) and are independently related to left ventricular hypertrophy (LVH) and incident cardiovascular events in these patients. OBJECTIVE To investigate the relationship between NPY receptor Y2 gene polymorphism and left ventricular mass index (LVMI) as well as the interaction between this polymorphism and plasma NPY in determining LVH in 189 ESRD patients. RESULTS LVMI was significantly higher (+12%, P = 0.03) in patients carrying the C allele than in those without C allele and was linearly associated with plasma NPY (P = 0.01). Interaction analysis showed a significant NPY-LVMI relationship in patients with the C allele, both at univariate (r = 0.27, P = 0.001) and multivariate (r = 0.21, P = 0.01) analyses, whereas no such relationship existed in patients without this allele. In fully adjusted analyses, a 10 pmol/l increase in plasma NPY entailed a 4.9 g/m increase in LVMI in patients with C allele, whereas the same change in NPY levels did not modify the NPY-LVMI link in patients without such allele (P = 0.009). CONCLUSION NPY receptor Y2 polymorphism is independently associated with LVMI and interacts with plasma levels of NPY in explaining the variability of LVH in ESRD. These results offer a genetic basis to the hypothesis that NPY is causally implicated in the pathogenetic pathway leading to LVH in ESRD patients.
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Taylor JY, Sun YV, Hunt SC, Kardia SLR. Gene-environment interaction for hypertension among African American women across generations. Biol Res Nurs 2010; 12:149-55. [PMID: 20591971 PMCID: PMC3005771 DOI: 10.1177/1099800410371225] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2024]
Abstract
African American women have the highest prevalence of hypertension and obesity of any group in the United States. African American girls have the highest incidence of obesity of any groups of children in the nation, and diagnoses of hypertension have been rising among this group. Because both genetic heredity and body mass index (BMI) are important risk factors for hypertension, this study examined the gene-BMI interaction for hypertension across the lifespan in two generations of African American women. Participants comprised of 868 African American women in the parent cohort and 322 in the offspring cohort from the Hypertension Genetic Epidemiology Network (HyperGEN) study, part of the Family Blood Pressure Program (FBPP). A total of 115 single-nucleotide polymorphisms (SNPs) were evaluated among the parent cohort and 491 among the offspring cohort for tests of SNP-BMI interaction using methods of false discovery rate (FDR; <.20) and examination of minor allele frequency (MAF; >.05) and Hardy-Weinberg equilibrium (>.10). One SNP (located in the CAPN 13 gene, rs1879282) passed adjustments for the multiple testing mentioned above and had a significant (p < .01) gene-BMI interaction on both systolic blood pressure (SBP) and diastolic blood pressure (DBP) among African American female offspring. The rs1879282 SNP is located on chromosome 2 on the calpain (CAPN) 13 gene, which is part of a family of cytosolic calcium-activated proteases involved in apoptosis, cell division, modulation of integrin-cytoskeletal interactions, and synaptic plasticity. This SNP was not available for testing in the African American parent cohort.
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Sarcomere gene mutations in hypertrophy and heart failure. J Cardiovasc Transl Res 2010; 3:297-303. [PMID: 20559778 DOI: 10.1007/s12265-010-9188-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Accepted: 04/20/2010] [Indexed: 01/12/2023]
Abstract
Despite considerable progress in identifying and modifying risk factors that cause cardiovascular disease, heart failure has emerged as an important medical and socioeconomic problem. Hypertrophic remodeling, a common response to many cardiovascular disorders, increases the risk of heart failure. Discovery of the genetic basis of hypertrophic cardiomyopathy has allowed consideration of whether these genes also contribute to pathologic remodeling that occurs in the context of common acquired cardiovascular disorders. Evidence supporting a shared etiology has emerged from the recent identification of sarcomere protein mutations and sequence variants in community-based populations with hypertrophy and heart failure. These findings imply that harnessing genetic testing for hypertrophic mutations may help define patients at risk for heart failure. In the future, mechanistic insights into hypertrophic remodeling, combined with strategies to prevent this pathology, are expected to reduce the burden of heart failure.
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Wijsman EM, Rothstein JH, Igo RP, Brunzell JD, Motulsky AG, Jarvik GP. Linkage and association analyses identify a candidate region for apoB level on chromosome 4q32.3 in FCHL families. Hum Genet 2010; 127:705-19. [PMID: 20383777 DOI: 10.1007/s00439-010-0819-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Accepted: 03/30/2010] [Indexed: 02/01/2023]
Abstract
Familial combined hyperlipidemia (FCHL) is a complex trait leading to cardiovascular disease (CVD) risk. Elevated levels and size of apolipoprotein B (apoB) and low-density lipoprotein (LDL) are associated with FCHL, which is genetically heterogeneous and is likely caused by rare variants. We carried out a linkage-based genome scan of four large FCHL pedigrees for apoB level that is independent of LDL: apoB level that is adjusted for LDL level and size. Follow-up included SNP genotyping in the region with the strongest evidence of linkage. Several regions with the evidence of linkage in individual pedigrees support the rare variant model. Evidence of linkage was strongest on chromosome 4q, with multipoint analysis in one pedigree giving LOD = 3.1 with a parametric model, and a log Bayes Factor = 1.5 from a Bayesian oligogenic approach. Of the 293 SNPs spanning the implicated region on 4q, rs6829588 completely explained the evidence of linkage. This SNP accounted for 39% of the apoB phenotypic variance, with heterozygotes for this SNP having a trait value that was approximately 30% higher than that of the high-frequency homozygote, thus identifying and considerably refining a strong candidate region. These results illustrate the advantage of using large pedigrees in the search for rare variants: reduced genetic heterogeneity within single pedigrees coupled with the large number of individuals segregating otherwise-rare single variants leads to high power to implicate such variants.
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Affiliation(s)
- Ellen M Wijsman
- Division of Medical Genetics, Department of Medicine, University of Washington, 4333 Brooklyn Ave NE, Box 359460, Seattle, WA 98195-9460, USA.
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Chauhan K, Devereux RB, Rao D, Broeckel U, Gu CC, Hopkins P, Arnett DK. Adducin 1 (alpha) Gly460Trp variant is associated with left ventricular geometry in Caucasians and African Americans: The HyperGEN Study. INTERNATIONAL JOURNAL OF MOLECULAR EPIDEMIOLOGY AND GENETICS 2010; 1:367-376. [PMID: 21532846 PMCID: PMC3076776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 12/31/2009] [Accepted: 02/21/2010] [Indexed: 05/30/2023]
Abstract
Normal left ventricular (LV) mass and geometry is required for optimal LV functioning. Abnormalities in either result in increased morbidity and mortality. The adducing 1 (alpha) gene (ADD1) Gly460Trp polymorphism has been associated with high blood pressure and increased plasma volume, both predictors of LV mass and function. In this cross-sectional study, we evaluate the association between this polymorphism and LV mass and geometry. LV mass, relative wall thickness (RWT), and systolic and diastolic parameters were measured using echocardiography in 3483 African American and Caucasian subjects from the Hypertension Genetic Epidemiology Network (HyperGEN). Analysis of covariance was used to estimate the polymorphism's association with echocardiograph parameters, stratified by race. The model was adjusted for age, diastolic and systolic blood pressure, glomerular filtration rate, smoking, low and high density lipoprotein cholesterol, urinary sodium, and body mass index. In Caucasians, the Trp allele was associated with higher ejection fraction (EF) (P = .02), fractional shortening (FS) (P = .02), and RWT (P = .03). In African Americans, the Trp allele was negatively associated with RWT (P = .02), but no association was found with EF (P= .08) or FS (P= .09). The polymorphism was not associated with diastolic function parameters in either racial group. We found no association of ADD1 Gly460Trp with LV mass in Caucasians or African Americans; however, it was associated with unfavorable LV geometry (higher RWT) in Caucasians and favorable LV geometry (lower RWT) in African Americans after controlling for factors that would affect plasma volume.
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Affiliation(s)
- Javier Díez
- From the Division of Cardiovascular Sciences (J.D.), Centre of Applied Medical Research, University of Navarra, Pamplona, Spain; Ochsner Clinic Foundation (E.D.F.), New Orleans, La
| | - Edward D. Frohlich
- From the Division of Cardiovascular Sciences (J.D.), Centre of Applied Medical Research, University of Navarra, Pamplona, Spain; Ochsner Clinic Foundation (E.D.F.), New Orleans, La
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Affiliation(s)
- Christian F Deschepper
- Experimental Cardiovascular Biology Research Unit, Institut de Recherches Cliniques de Montréal, Montréal, Quebec, Canada.
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Arnett DK, Li N, Tang W, Rao DC, Devereux RB, Claas SA, Kraemer R, Broeckel U. Genome-wide association study identifies single-nucleotide polymorphism in KCNB1 associated with left ventricular mass in humans: the HyperGEN Study. BMC MEDICAL GENETICS 2009; 10:43. [PMID: 19454037 PMCID: PMC2692849 DOI: 10.1186/1471-2350-10-43] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2008] [Accepted: 05/19/2009] [Indexed: 01/19/2023]
Abstract
Background We conducted a genome-wide association study (GWAS) and validation study for left ventricular (LV) mass in the Family Blood Pressure Program – HyperGEN population. LV mass is a sensitive predictor of cardiovascular mortality and morbidity in all genders, races, and ages. Polymorphisms of candidate genes in diverse pathways have been associated with LV mass. However, subsequent studies have often failed to replicate these associations. Genome-wide association studies have unprecedented power to identify potential genes with modest effects on left LV mass. We describe here a GWAS for LV mass in Caucasians using the Affymetrix GeneChip Human Mapping 100 k Set. Cases (N = 101) and controls (N = 101) were selected from extreme tails of the LV mass index distribution from 906 individuals in the HyperGEN study. Eleven of 12 promising (Q < 0.8) single-nucleotide polymorphisms (SNPs) from the genome-wide study were successfully genotyped using quantitative real time PCR in a validation study. Results Despite the relatively small sample, we identified 12 promising SNPs in the GWAS. Eleven SNPs were successfully genotyped in the validation study of 704 Caucasians and 1467 African Americans; 5 SNPs on chromosomes 5, 12, and 20 were significantly (P ≤ 0.05) associated with LV mass after correction for multiple testing. One SNP (rs756529) is intragenic within KCNB1, which is dephosphorylated by calcineurin, a previously reported candidate gene for LV hypertrophy within this population. Conclusion These findings suggest KCNB1 may be involved in the development of LV hypertrophy in humans.
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Affiliation(s)
- Donna K Arnett
- Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, 1530 3rd Avenue South, Birmingham AL 35294-0022, USA.
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