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Updated: Dec 30, 2025

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
03:45

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model

Published on: August 8, 2022

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Potential digenic inheritance of familial hypertrophic cardiomyopathy identified by whole-exome sequencing

Ming-Bao Ren1, Xiao-Rui Chai2, Lin Li3

  • 1Department of Obstetrics, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China.

Molecular Genetics & Genomic Medicine
|January 22, 2020
PubMed

Insights

Genetic testing revealed a TNNI3 gene deletion and an MYH7 variant in familial hypertrophic cardiomyopathy (HCM) patients. Whole-exome sequencing identified these structural variations, offering new insights into HCM causes.

Area of Science:

  • Genetics
  • Cardiology
  • Molecular Biology

Background:

  • Hypertrophic cardiomyopathy (HCM) is often caused by point mutations.
  • Whole-gene deletions are rarely reported as a cause of HCM.
  • Structural variations in HCM genetics remain understudied due to methodological limitations.

Observation:

  • Whole-exome sequencing (WES) was employed to investigate genetic underpinnings in familial HCM.
  • Structural variations, including whole-gene deletions, are understudied due to methodological limitations.
  • This study utilized WES and Sanger sequencing for comprehensive genetic variant identification.

Findings:

  • A whole-gene deletion of the troponin I3 (TNNI3) gene on Chromosome 19 was identified.
  • A pathogenic variant (p.Ile736Thr) in the myosin heavy chain 7 (MYH7) gene was detected.
  • Both TNNI3 deletion and MYH7 variant were found in patients with familial HCM.

Implications:

  • The TNNI3 deletion and MYH7 variant may play a role in HCM pathogenesis.
  • WES is confirmed as an effective method for uncovering genetic causes of HCM.
  • This research expands the understanding of genetic variations contributing to familial HCM.
Abstract

Keywords:
MYH7TNNI3hypertrophic cardiomyopathywhole-exome sequencing

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