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Orgil BO, Purevjav E. Molecular Pathways and Animal Models of Cardiomyopathies. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1441:991-1019. [PMID: 38884766 DOI: 10.1007/978-3-031-44087-8_64] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
Cardiomyopathies are a heterogeneous group of disorders of the heart muscle that ultimately result in congestive heart failure. Rapid progress in genetics, molecular and cellular biology with breakthrough innovative genetic-engineering techniques, such as next-generation sequencing and multiomics platforms, stem cell reprogramming, as well as novel groundbreaking gene-editing systems over the past 25 years has greatly improved the understanding of pathogenic signaling pathways in inherited cardiomyopathies. This chapter will focus on intracellular and intercellular molecular signaling pathways that are activated by a genetic insult in cardiomyocytes to maintain tissue and organ level regulation and resultant cardiac remodeling in certain forms of cardiomyopathies. In addition, animal models of different clinical forms of human cardiomyopathies with their summaries of triggered key molecules and signaling pathways will be described.
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Affiliation(s)
- Buyan-Ochir Orgil
- Department of Pediatrics, The Heart Institute, Division of Cardiology, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Enkhsaikhan Purevjav
- Department of Pediatrics, The Heart Institute, Division of Cardiology, University of Tennessee Health Science Center, Memphis, TN, USA.
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2
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Paz-Cruz E, Ruiz-Pozo VA, Cadena-Ullauri S, Guevara-Ramirez P, Tamayo-Trujillo R, Ibarra-Castillo R, Laso-Bayas JL, Onofre-Ruiz P, Domenech N, Ibarra-Rodriguez AA, Zambrano AK. Associations of MYPN, TTN, SCN5A, MYO6 and ELN Mutations With Arrhythmias and Subsequent Sudden Cardiac Death: A Case Report of an Ecuadorian Individual. Cardiol Res 2023; 14:409-415. [PMID: 37936622 PMCID: PMC10627373 DOI: 10.14740/cr1552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 08/02/2023] [Indexed: 11/09/2023] Open
Abstract
Cardiac pathologies are among the most frequent causes of death worldwide. Regarding cardiovascular deaths, it is estimated that 5 million cases are caused by sudden cardiac death (SCD) annually. The primary cause of SCD is ventricular arrhythmias. Genomic studies have provided pathogenic, likely pathogenic, and variants of uncertain significance that may predispose individuals to cardiac causes of sudden death. In this study, we describe the case of a 43-year-old individual who experienced an episode of aborted SCD. An implantable cardioverter defibrillator was placed to prevent further SCD episodes. The diagnosis was ventricular fibrillation. Genomic analysis revealed some variants in the MYPN (pathogenic), GCKR (likely pathogenic), TTN (variant of uncertain significance), SCN5A (variant of uncertain significance), MYO6 (variant of uncertain significance), and ELN (variant of uncertain significance) genes, which could be associated with SCD episodes. In addition, a protein-protein interaction network was obtained, with proteins related to ventricular arrhythmia and the biological processes involved. Therefore, this study identified genetic variants that may be associated with and trigger SCD in the individual. Moreover, genetic variants of uncertain significance, which have not been reported, could contribute to the genetic basis of the disease.
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Affiliation(s)
- Elius Paz-Cruz
- Centro de Investigacion Genetica y Genomica, Facultad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito, Ecuador
- These authors contributed equally to this work and share first authorship
| | - Viviana A Ruiz-Pozo
- Centro de Investigacion Genetica y Genomica, Facultad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito, Ecuador
- These authors contributed equally to this work and share first authorship
| | - Santiago Cadena-Ullauri
- Centro de Investigacion Genetica y Genomica, Facultad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito, Ecuador
| | - Patricia Guevara-Ramirez
- Centro de Investigacion Genetica y Genomica, Facultad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito, Ecuador
| | - Rafael Tamayo-Trujillo
- Centro de Investigacion Genetica y Genomica, Facultad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito, Ecuador
| | | | | | - Paul Onofre-Ruiz
- Facultad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito, Ecuador
| | - Nieves Domenech
- Instituto de Investigacion Biomedica de A Coruna (INIBIC) - CIBERCV, Complexo Hospitalario Universitario de A Coruna (CHUAC), Sergas, Universidad da Coruna (UDC), Spain
| | | | - Ana Karina Zambrano
- Centro de Investigacion Genetica y Genomica, Facultad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito, Ecuador
- These authors contributed equally to this work and share first authorship
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3
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Orgil BO, Xu F, Munkhsaikhan U, Alberson NR, Bajpai AK, Johnson JN, Sun Y, Towbin JA, Lu L, Purevjav E. Echocardiography phenotyping in murine genetic reference population of BXD strains reveals significant QTLs associated with cardiac function and morphology. Physiol Genomics 2023; 55:51-66. [PMID: 36534598 PMCID: PMC9902221 DOI: 10.1152/physiolgenomics.00120.2022] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 12/14/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022] Open
Abstract
The genetic reference population of recombinant inbred BXD mice has been derived from crosses between C57BL/6J and DBA/2J strains. The DBA/2J parent exhibits cardiomyopathy phenotypes, whereas C57BL/6J has normal heart. BXD mice are sequenced for studying genetic interactions in cardiomyopathies. The study aimed to assess cardiomyopathy traits in BXDs and investigate the quantitative genetic architecture of those traits. Echocardiography, blood pressure, and cardiomyocyte size parameters obtained from 44 strains of BXD family (n > 5/sex) at 4-5 mo of age were associated with heart transcriptomes and expression quantitative trait loci (eQTL) mapping was performed. More than twofold variance in ejection fraction (EF%), fractional shortening (FS%), left ventricular volumes (LVVols), internal dimensions (LVIDs), mass (LVM), and posterior wall (LVPW) thickness was found among BXDs. In male BXDs, eQTL mapping identified Ndrg4 on chromosome 8 QTL to be positively correlated with LVVol and LVID and negatively associated with cardiomyocyte diameter. In female BXDs, significant QTLs were found on chromosomes 7 and 3 to be associated with LVPW and EF% and FS%, respectively, and Josd2, Dap3, and Tpm3 were predicted as strong candidate genes. Our study found variable cardiovascular traits among BXD strains and identified multiple associated QTLs, suggesting an influence of genetic background on expression of echocardiographic and cardiomyocyte diameter traits. Increased LVVol and reduced EF% and FS% represented dilated cardiomyopathy, whereas increased LV mass and wall thickness indicated hypertrophic cardiomyopathy traits. The BXD family is ideal for identifying candidate genes, causal and modifier, that influence cardiovascular phenotypes.NEW & NOTEWORTHY This study aimed to establish a cardiac phenotype-genotype correlation in murine genetic reference population of BXD RI strains by phenotyping the echocardiography, blood pressure, and cardiomyocyte diameter traits and associating each collected phenotype with genetic background. Our study identified several QTLs and candidate genes that have significant association with cardiac hypertrophy, ventricular dilation, and function including systolic hyperfunction and dysfunction.
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Affiliation(s)
- Buyan-Ochir Orgil
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
- Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee
| | - Fuyi Xu
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, Tennessee
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Undral Munkhsaikhan
- Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Neely R Alberson
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
- Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee
| | - Akhilesh Kumar Bajpai
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Jason N Johnson
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
- Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee
| | - Yao Sun
- Division of Cardiovascular Diseases, Department of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Jeffrey A Towbin
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
- Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee
- Pediatric Cardiology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Lu Lu
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Enkhsaikhan Purevjav
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
- Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee
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4
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Li Z, Wang T, Xin C, Song Y, Kong J, Xu J, Liu Q, Teng Y, Hou N, Cheng X, Yang G, Liu W, Zhou B, Zhang Y, Yang X, Wang J. Hgs Deficiency Caused Restrictive Cardiomyopathy via Disrupting Proteostasis. Int J Biol Sci 2022; 18:2018-2031. [PMID: 35342336 PMCID: PMC8935245 DOI: 10.7150/ijbs.69024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 02/06/2022] [Indexed: 12/24/2022] Open
Abstract
The molecular mechanisms underlying restrictive cardiomyopathy (RCM) are not fully understood. Hepatocyte growth factor-regulated tyrosine kinase substrate (HGS) is a vital element of Endosomal sorting required for transport (ESCRT), which mediates protein sorting for degradation and is crucial for protein homeostasis (proteostasis) maintenance. However, the physiological function and underlying mechanisms of HGS in RCM are unexplored. We hypothesized that HGS may play vital roles in cardiac homeostasis. Cardiomyocyte-specific Hgs gene knockout mice were generated and developed a phenotype similar to human RCM. Proteomic analysis revealed that Hgs deficiency impaired lysosomal homeostasis in cardiomyocytes. Loss of Hgs disrupted cholesterol transport and lysosomal integrity, resulting in lysosomal storage disorder (LSD) with aberrant autophagosome accumulation and protein aggregation. Suppression of protein aggregation by doxycycline treatment attenuated cardiac fibrosis, and diastolic dysfunction in Hgs-knockout mice. These findings uncovered a novel physiological role of HGS in regulating cardiac lysosomal homeostasis and proteostasis, suggesting that the deficient HGS contributes to LSD-associated RCM-like cardiomyopathy.
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Affiliation(s)
- Zhenhua Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China
| | - Tianle Wang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China
| | - Chong Xin
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China
| | - Yao Song
- Institute of Vascular Medicine, Peking University Third Hospital and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health, Beijing 100191, China
| | - Jingyi Kong
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China
| | - Jingping Xu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China
| | - Qiqi Liu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China
| | - Yan Teng
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China
| | - Ning Hou
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China
| | - Xuan Cheng
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China
| | - Guan Yang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China
| | - Wenjia Liu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China
| | - Bin Zhou
- The State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Youyi Zhang
- Institute of Vascular Medicine, Peking University Third Hospital and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health, Beijing 100191, China.,✉ Corresponding authors: Jian Wang, PhD, State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China. Phone: +86 10 63895937, E-mail: . or Xiao Yang, State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China. Phone: +86 10 63895937, E-mail: . or Youyi Zhang, Institute of Vascular Medicine, Peking University Third Hospital, Beijing 100191, China. Phone: +86 10 82802306, E-mail:
| | - Xiao Yang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China.,✉ Corresponding authors: Jian Wang, PhD, State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China. Phone: +86 10 63895937, E-mail: . or Xiao Yang, State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China. Phone: +86 10 63895937, E-mail: . or Youyi Zhang, Institute of Vascular Medicine, Peking University Third Hospital, Beijing 100191, China. Phone: +86 10 82802306, E-mail:
| | - Jian Wang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China.,✉ Corresponding authors: Jian Wang, PhD, State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China. Phone: +86 10 63895937, E-mail: . or Xiao Yang, State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing 100071, China. Phone: +86 10 63895937, E-mail: . or Youyi Zhang, Institute of Vascular Medicine, Peking University Third Hospital, Beijing 100191, China. Phone: +86 10 82802306, E-mail:
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5
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Gu Q, Xu F, Orgil BO, Khuchua Z, Munkhsaikhan U, Johnson JN, Alberson NR, Pierre JF, Black DD, Dong D, Brennan JA, Cathey BM, Efimov IR, Towbin JA, Purevjav E, Lu L. Systems Genetics Analysis Defines Importance Of TMEM43/LUMA For Cardiac And Metabolic Related Pathways. Physiol Genomics 2021; 54:22-35. [PMID: 34766515 PMCID: PMC8721901 DOI: 10.1152/physiolgenomics.00066.2021] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Broad cellular functions and diseases including muscular dystrophy,
arrhythmogenic right ventricular cardiomyopathy (ARVC5) and cancer are
associated with transmembrane protein43 (TMEM43/LUMA). The
study aimed to investigate biological roles of TMEM43 through
genetic regulation, gene pathways and gene networks, candidate interacting
genes, and up- or downstream regulators. Cardiac transcriptomes from 40 strains
of recombinant inbred BXD mice and two parental strains representing murine
genetic reference population (GRP) were applied for genetic correlation,
functional enrichment, and coexpression network analysis using systems genetics
approach. The results were validated in a newly created knock-in
Tmem43-S358L mutation mouse model (Tmem43S358L)
that displayed signs of cardiac dysfunction, resembling ARVC5 phenotype seen in
humans. We found high Tmem43 levels among BXDs with broad
variability in expression. Expression of Tmem43 highly
negatively correlated with heart mass and heart rate among BXDs, whereas levels
of Tmem43 highly positively correlated with plasma high-density
lipoproteins (HDL). Through finding differentially expressed genes (DEGs)
between Tmem43S358L mutant and wild-type (Tmem43WT) lines,
18 pathways (out of 42 found in BXDs GRP) that are involved in ARVC,
hypertrophic cardiomyopathy, dilated cardiomyopathy, nonalcoholic fatty liver
disease, Alzheimer’s disease, Parkinson’s disease, and
Huntington’s disease were verified. We further constructed
Tmem43-mediated gene network, in which
Ctnna1, Adcy6, Gnas,
Ndufs6, and Uqcrc2 were significantly
altered in Tmem43S358L mice versus Tmem43WT controls. Our
study defined the importance of Tmem43 for cardiac- and
metabolism-related pathways, suggesting that cardiovascular disease-relevant
risk factors may also increase risk of metabolic and neurodegenerative diseases
via TMEM43-mediated pathways.
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Affiliation(s)
- Qingqing Gu
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States.,Department of Cardiology, The Affiliated Hospital of Nantong University, China
| | - Fuyi Xu
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Buyan-Ochir Orgil
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital Memphis, TN, United States
| | - Zaza Khuchua
- The Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States.,Department of Biochemistry, Sechenov University, Moscow, Russia
| | - Undral Munkhsaikhan
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital Memphis, TN, United States
| | - Jason N Johnson
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital Memphis, TN, United States
| | - Neely R Alberson
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital Memphis, TN, United States
| | - Joseph F Pierre
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital Memphis, TN, United States
| | - Dennis Darrel Black
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital Memphis, TN, United States
| | - Deli Dong
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, China
| | - Jaclyn A Brennan
- Department of Biomedical Engineering, The George Washington University, Washington, DC, United States
| | - Brianna M Cathey
- Department of Biomedical Engineering, The George Washington University, Washington, DC, United States
| | - Igor R Efimov
- Department of Biomedical Engineering, The George Washington University, Washington, DC, United States
| | - Jeffrey A Towbin
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital Memphis, TN, United States.,Pediatric Cardiology, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Enkhsaikhan Purevjav
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital Memphis, TN, United States
| | - Lu Lu
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States
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Zhao T, Ma Y, Zhang Z, Xian J, Geng X, Wang F, Huang J, Yang Z, Luo Y, Lin Y. Young and early-onset dilated cardiomyopathy with malignant ventricular arrhythmia and sudden cardiac death induced by the heterozygous LDB3, MYH6, and SYNE1 missense mutations. Ann Noninvasive Electrocardiol 2021; 26:e12840. [PMID: 33949037 PMCID: PMC8293610 DOI: 10.1111/anec.12840] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/10/2021] [Accepted: 02/17/2021] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND The whole exome sequencing (WES) with targeted gene analysis is an effective diagnostic tool for cardiomyopathy. The early-onset sudden cardiac death (SCD) was commonly associated with dilated cardiomyopathy (DCM) induced by pathogenic genetic mutations. METHODS In a Chinese Han family, the patient of 24 years old occurred with early-onset and DCM and died of SCD associated with ICD storms induced by repetitive ventricular tachycardia/fibrillation (VT/F). Genomic DNA samples of peripheral blood were conducted for WES and Sanger sequence. Then, we performed bioinformatics analysis for 200 genes susceptible to cardiomyopathies and arrhythmias. Further, we analyzed how the potential pathogenic mutations affecting the secondary structure, hydrophobicity, and phosphorylation of amino acids, protein properties, and their joint pathogenicity by ProtParam, SOPMA, and ORVAL algorisms. The protein-protein interaction was analyzed by STRING algorism. RESULTS The mutations of LDB3 p.M456R, MYH6 p.S180Y, and SYNE1 p.S4607F were identified as "Damaging/Deleterious." The SYNE1 (p.S4607F) increased one of alpha helix and decreased one of beta sheet. The LDB3 (p.M456R) reduced one of beta sheet and increased one of beta turn. The MYH6 (p.S180Y) decreased two of beta sheets and four of beta turns, but significantly increased twelve coils. The hydrophobicity of amino acid residues and their adjacent sequences were decreased by LDB3 (p.M456R) and MYH6 (p.S180Y), and significantly increased by SYNE1 (p.S4607F). The mutations of LDB3 (p.M456R), SYNE1 (p.S4607F), and MYH6 (p.S180Y) resulted in the phosphorylation changes of the corresponding amino acid sites or the nearby amino acid sites. The pairwise combinations of LDB3, MYH6, and SYNE1 mutations have the high probability of causing disease, especially the highest probability for SYNE1 and LDB3 mutations. There was obviously indirect interaction of the proteins encoded by SYNE1, LDB3, and MYH6. CONCLUSIONS The multiple heterozygous mutations of SYNE1, LDB3, and MYH6 may be associated with young and early-onset of DCM and SCD.
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Affiliation(s)
- Ting Zhao
- The First Hospital Affiliated to Jinan University, The First People's Hospital of Guangzhou, Guangzhou, China.,Department of Cardiology, The Cardiovascular Center, Interventional Medical Center, Guangdong Provincial Key Laboratory of Biomedical Imaging and Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, China
| | - Yuting Ma
- Department of Cardiology, The Cardiovascular Center, Interventional Medical Center, Guangdong Provincial Key Laboratory of Biomedical Imaging and Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, China.,BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China
| | - Zuoquan Zhang
- Department of Cardiology, The Cardiovascular Center, Interventional Medical Center, Guangdong Provincial Key Laboratory of Biomedical Imaging and Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, China
| | - Jianzhong Xian
- Department of Cardiology, The Cardiovascular Center, Interventional Medical Center, Guangdong Provincial Key Laboratory of Biomedical Imaging and Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, China
| | - Xiaojing Geng
- Department of Cardiology, The Cardiovascular Center, Interventional Medical Center, Guangdong Provincial Key Laboratory of Biomedical Imaging and Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, China
| | - Feng Wang
- Guangdong Academy of Medical Sciences, Guangdong Geriatrics Institute, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangzhou, China
| | - Jiana Huang
- Reproductive Center, The Six Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zhe Yang
- Department of Cardiology, The Cardiovascular Center, Interventional Medical Center, Guangdong Provincial Key Laboratory of Biomedical Imaging and Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, China
| | - Yi Luo
- The First Hospital Affiliated to Jinan University, The First People's Hospital of Guangzhou, Guangzhou, China
| | - Yubi Lin
- Department of Cardiology, The Cardiovascular Center, Interventional Medical Center, Guangdong Provincial Key Laboratory of Biomedical Imaging and Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, China
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7
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Xu F, Chen Y, Tillman KA, Cui Y, Williams RW, Bhattacharya SK, Lu L, Sun Y. Characterizing modifier genes of cardiac fibrosis phenotype in hypertrophic cardiomyopathy. Int J Cardiol 2021; 330:135-141. [PMID: 33529666 PMCID: PMC8105878 DOI: 10.1016/j.ijcard.2021.01.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 01/18/2021] [Accepted: 01/24/2021] [Indexed: 01/19/2023]
Abstract
BACKGROUND Clinical phenotypes of hypertrophic cardiomyopathy (HCM) vary greatly even among patients with the same gene mutations. This variability is largely regulated by unidentified modifier loci. The purpose of the study is to identify modifier genes for cardiac fibrosis-a major phenotype of HCM-using the BXD family, a murine cohort. METHODS The relative severity of cardiac fibrosis was estimated by quantitation of cardiac collagen volume fraction (CCVF) across 66 members of the BXD family. Quantitative trait locus (QTL) mapping for cardiac fibrosis was done using GeneNetwork. Candidate modifier loci and genes associated with fibrosis were prioritized based on an explicit scoring system. Networks of correlation between fibrosis and cardiac transcriptomes were evaluated to generate causal models of disease susceptibility. RESULTS CCVF levels varied greatly within this family. Interval mapping identified a significant CCVF-related QTL on chromosome (Chr) 2 in males, and a significant QTL on Chr 4 Mb in females. The scoring system highlighted two strong candidate genes in the Chr 2 locus-Nek6 and Nr6a1. Both genes are highly expressed in the heart. Cardiac Nek6 mRNA levels are significantly correlated with CCVF. Nipsnap3b and Fktn are lead candidate genes for the Chr 4 locus, and both are also highly expressed in heart. Cardiac Nipsnap3b gene expression correlates well with CCVF. CONCLUSION Our study demonstrated that candidate modifier genes of cardiac fibrosis phenotype in HCM are different in males and females. Nek6 and Nr6a1 are strong candidates in males, while Nipsnap3b and Fktn are top candidates in females.
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Affiliation(s)
- Fuyi Xu
- Division of Cardiovascular Diseases, Department of Medicine, Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States of America
| | - Yuanjian Chen
- Division of Cardiovascular Diseases, Department of Medicine, Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States of America
| | - Kaitlin A Tillman
- Division of Cardiovascular Diseases, Department of Medicine, Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States of America
| | - Yan Cui
- Division of Cardiovascular Diseases, Department of Medicine, Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States of America
| | - Robert W Williams
- Division of Cardiovascular Diseases, Department of Medicine, Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States of America
| | - Syamal K Bhattacharya
- Division of Cardiovascular Diseases, Department of Medicine, Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States of America
| | - Lu Lu
- Division of Cardiovascular Diseases, Department of Medicine, Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States of America.
| | - Yao Sun
- Division of Cardiovascular Diseases, Department of Medicine, Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States of America.
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8
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Vejandla RM, Orgil BO, Alberson NR, Li N, Munkhsaikhan U, Khuchua Z, Martherus R, Azeloglu EU, Xu F, Lu L, Towbin JA, Purevjav E. Deficiency in nebulin repeats of sarcomeric nebulette is detrimental for cardiomyocyte tolerance to exercise and biomechanical stress. Am J Physiol Heart Circ Physiol 2021; 320:H2130-H2146. [PMID: 33861145 DOI: 10.1152/ajpheart.00732.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The actin-binding sarcomeric nebulette (NEBL) protein provides efficient contractile flexibility via interaction with desmin intermediate filaments. NEBL gene mutations affecting the nebulin repeat (NR) domain are known to induce cardiomyopathy. The study aimed to explore the roles of NEBL in exercise and biomechanical stress response. We ablated exon3 encoding the first NR of Nebl and created global Neblex3-/ex3- knockout mice. Cardiac function, structure, and transcriptome were assessed before and after a 4-wk treadmill regimen. A Nebl-based exercise signaling network was constructed using systems genetics methods. H9C2 and neonatal rat cardiomyocytes (NRCs) expressing wild-type or mutant NEBL underwent cyclic mechanical strain. Neblex3-/ex3- mice demonstrated diastolic dysfunction with preserved systolic function at 6 mo of age. After treadmill running, 4-mo-old Neblex3-/ex3- mice developed concentric cardiac hypertrophy and left ventricular dilation compared with running Nebl+/+ and sedentary Neblex3-/ex3- mice. Disturbance of sarcomeric Z-disks and thin filaments architecture and disruption of intercalated disks and mitochondria were found in exercised Neblex3-/ex3- mice. A Nebl-based exercise signaling network included Csrp3, Des, Fbox32, Jup, Myh6, and Myh7. Disturbed expression of TM1, DES, JUP, β-catenin, MLP, α-actinin2, and vinculin proteins was demonstrated. In H9C2 cells, NEBL was recruited into focal adhesions at 24-h poststrain and redistributed along with F-actin at 72-h poststrain, suggesting time-dependent redistribution of NEBL in response to strain. NEBL mutations cause desmin disorganization in NRCs upon stretch. We conclude that Nebl's NR ablation causes disturbed sarcomere, Z-disks, and desmin organization, and prevents NEBL redistribution to focal adhesions in cardiomyocytes, weakening cardiac tolerance to biomechanical stress.NEW & NOTEWORTHY We demonstrate that ablation of first nebulin-repeats of sarcomeric nebulette (Nebl) causes diastolic dysfunction in Neblex3-/ex3- mice. Exercise-induced development of diastolic dysfunction, cardiac hypertrophy and ventricular dilation in knockouts. This was associated with sarcomere disturbance, intercalated disks disruption, and mitochondrial distortion upon stress and altered expression of genes involved in Nebl-based stress network. We demonstrate that G202R and A592 mutations alter actin and desmin expression causing disorganization of desmin filaments upon cyclic strain.
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Affiliation(s)
- Ramona M Vejandla
- The Heart Institute, Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee
| | - Buyan-Ochir Orgil
- The Heart Institute, Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee
| | - Neely R Alberson
- The Heart Institute, Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee
| | - Ning Li
- The Heart Institute, Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee.,Department of Cardiology, Second Affiliated Hospital, Harbin Medical University, Harbin, China
| | - Undral Munkhsaikhan
- The Heart Institute, Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee
| | - Zaza Khuchua
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.,Department of Biochemistry, Sechenov University, Moscow, Russia.,Department of Biology and Biotechnology, Higher School of Economics, Moscow, Russia
| | - Ruben Martherus
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Evren U Azeloglu
- Department of Medicine, Nephrology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Fuyi Xu
- Department of Genetics, Genomics, and Informatics, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Lu Lu
- Department of Genetics, Genomics, and Informatics, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Jeffrey A Towbin
- The Heart Institute, Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee.,Pediatric Cardiology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Enkhsaikhan Purevjav
- The Heart Institute, Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee
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9
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Xu F, Gao J, Munkhsaikhan U, Li N, Gu Q, Pierre JF, Starlard-Davenport A, Towbin JA, Cui Y, Purevjav E, Lu L. The Genetic Dissection of Ace2 Expression Variation in the Heart of Murine Genetic Reference Population. Front Cardiovasc Med 2020; 7:582949. [PMID: 33330645 PMCID: PMC7714829 DOI: 10.3389/fcvm.2020.582949] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 09/02/2020] [Indexed: 12/12/2022] Open
Abstract
Background: A high inflammatory and cytokine burden that induces vascular inflammation, myocarditis, cardiac arrhythmias, and myocardial injury is associated with a lethal outcome in COVID-19. The SARS-CoV-2 virus utilizes the ACE2 receptor for cell entry in a similar way to SARS-CoV. This study investigates the regulation, gene network, and associated pathways of ACE2 that may be involved in inflammatory and cardiovascular complications of COVID-19. Methods: Cardiovascular traits were determined in the one of the largest mouse genetic reference populations: BXD recombinant inbred strains using blood pressure, electrocardiography, and echocardiography measurements. Expression quantitative trait locus (eQTL) mapping, genetic correlation, and functional enrichment analysis were used to identify Ace2 regulation, gene pathway, and co-expression networks. Results: A wide range of variation was found in expression of Ace2 among the BXD strains. Levels of Ace2 expression are negatively correlated with cardiovascular traits, including systolic and diastolic blood pressure and P wave duration and amplitude. Ace2 co-expressed genes are significantly involved in cardiac- and inflammatory-related pathways. The eQTL mapping revealed that Cyld is a candidate upstream regulator for Ace2. Moreover, the protein–protein interaction (PPI) network analysis inferred several potential key regulators (Cul3, Atf2, Vcp, Jun, Ppp1cc, Npm1, Mapk8, Set, Dlg1, Mapk14, and Hspa1b) for Ace2 co-expressed genes in the heart. Conclusions:Ace2 is associated with blood pressure, atrial morphology, and sinoatrial conduction in BXD mice. Ace2 co-varies with Atf2, Cyld, Jun, Mapk8, and Mapk14 and is enriched in the RAS, TGFβ, TNFα, and p38α signaling pathways, involved in inflammation and cardiac damage. We suggest that all these novel Ace2-associated genes and pathways may be targeted for preventive, diagnostic, and therapeutic purposes in cardiovascular damage in patients with systemic inflammation, including COVID-19 patients.
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Affiliation(s)
- Fuyi Xu
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Jun Gao
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Undral Munkhsaikhan
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, TN, United States
| | - Ning Li
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, TN, United States.,Department of Cardiology, Second Affiliated Hospital, Harbin Medical University, Harbin, China
| | - Qingqing Gu
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States.,Department of Cardiology, The Affiliated Hospital of Nantong University, Nantong, China
| | - Joseph F Pierre
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, TN, United States
| | - Athena Starlard-Davenport
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Jeffrey A Towbin
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, TN, United States.,Pediatric Cardiology, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Yan Cui
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Enkhsaikhan Purevjav
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, TN, United States
| | - Lu Lu
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, United States
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10
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Chen Y, Xu F, Munkhsaikhan U, Boyle C, Borcky T, Zhao W, Purevjav E, Towbin JA, Liao F, Williams RW, Bhattacharya SK, Lu L, Sun Y. Identifying modifier genes for hypertrophic cardiomyopathy. J Mol Cell Cardiol 2020; 144:119-126. [DOI: 10.1016/j.yjmcc.2020.05.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 04/29/2020] [Accepted: 05/11/2020] [Indexed: 12/19/2022]
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11
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Williams EG, Wu Y, Wolski W, Kim JY, Lan J, Hasan M, Halter C, Jha P, Ryu D, Auwerx J, Aebersold R. Quantifying and Localizing the Mitochondrial Proteome Across Five Tissues in A Mouse Population. Mol Cell Proteomics 2018; 17:1766-1777. [PMID: 29945935 DOI: 10.1074/mcp.ra118.000554] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 04/17/2018] [Indexed: 12/12/2022] Open
Abstract
We have used SWATH mass spectrometry to quantify 3648 proteins across 76 proteomes collected from genetically diverse BXD mouse strains in two fractions (mitochondria and total cell) from five tissues: liver, quadriceps, heart, brain, and brown adipose (BAT). Across tissues, expression covariation between genes' proteins and transcripts-measured in the same individuals-broadly aligned. Covariation was however far stronger in certain subsets than others: only 8% of transcripts in the lowest expression and variance quintile covaried with their protein, in contrast to 65% of transcripts in the highest quintiles. Key functional differences among the 3648 genes were also observed across tissues, with electron transport chain (ETC) genes particularly investigated. ETC complex proteins covary and form strong gene networks according to tissue, but their equivalent transcripts do not. Certain physiological consequences, such as the depletion of ATP synthase in BAT, are thus obscured in transcript data. Lastly, we compared the quantitative proteomic measurements between the total cell and mitochondrial fractions for the five tissues. The resulting enrichment score highlighted several hundred proteins which were strongly enriched in mitochondria, which included several dozen proteins were not reported in literature to be mitochondrially localized. Four of these candidates were selected for biochemical validation, where we found MTAP, SOAT2, and IMPDH2 to be localized inside the mitochondria, whereas ABCC6 was in the mitochondria-associated membrane. These findings demonstrate the synergies of a multi-omics approach to study complex metabolic processes, and this provides a resource for further discovery and analysis of proteoforms, modified proteins, and protein localization.
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Affiliation(s)
- Evan G Williams
- From the ‡Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich CH-8093, Switzerland.,§Interfaculty Institute of Bioengineering, Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH-1015, Switzerland
| | - Yibo Wu
- From the ‡Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich CH-8093, Switzerland.,**Current address: RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro-cho Tsurumi-ku Yokohama City, Kanagawa, 230-0045, Japan
| | - Witold Wolski
- ¶Functional Genomics Center Zurich, ETH Zurich, Zurich CH-8057, Switzerland
| | - Jun Yong Kim
- §Interfaculty Institute of Bioengineering, Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH-1015, Switzerland
| | - Jiayi Lan
- From the ‡Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich CH-8093, Switzerland
| | - Moaraj Hasan
- From the ‡Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich CH-8093, Switzerland
| | - Christian Halter
- From the ‡Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich CH-8093, Switzerland
| | - Pooja Jha
- §Interfaculty Institute of Bioengineering, Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH-1015, Switzerland
| | - Dongryeol Ryu
- §Interfaculty Institute of Bioengineering, Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH-1015, Switzerland.,‡‡Current address: Healthy Aging-Korean Medical Research Center, Pusan National University, School of Korean Medicine, Yangsan 50612, Republic of Korea
| | - Johan Auwerx
- §Interfaculty Institute of Bioengineering, Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH-1015, Switzerland;
| | - Ruedi Aebersold
- From the ‡Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich CH-8093, Switzerland; .,‖Faculty of Science, University of Zurich, Zurich CH-8057, Switzerland
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