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Updated: Nov 19, 2025

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
Published on: August 8, 2022
Adiponectin receptor 1 variants contribute to hypertrophic cardiomyopathy that can be reversed by rapamycin
Perundurai S Dhandapany1,2,3, Soojeong Kang4, Deepak K Kashyap5,6
1Centre for Cardiovascular Biology and Disease, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, India. dhan@instem.res.in djamel.lebeche@mssm.edu.
Insights
Novel genetic variants in adiponectin receptor 1 (ADIPOR1) are linked to hypertrophic cardiomyopathy (HCM). These ADIPOR1 variants disrupt metabolism and cause cardiac hypertrophy, offering new insights into HCM development.
Area of Science:
- Genetics
- Cardiology
- Metabolism
Background:
- Hypertrophic cardiomyopathy (HCM) is a genetic heart disease.
- Approximately 10% of HCM patients have comorbid diabetes mellitus.
- The genetic basis for combined HCM and diabetes is unknown.
Purpose of the Study:
- To investigate genetic variants contributing to HCM and comorbid diabetes.
- To identify novel genetic risk factors for hypertrophic cardiomyopathy.
Main Methods:
- Next-generation sequencing to identify genetic variants.
- Biochemical assays to study metabolic dysregulation.
- Transgenic mouse models to validate findings.
Main Results:
- Novel and ultrarare variants in ADIPOR1 were identified as risk factors for HCM.
- ADIPOR1 variants dysregulate glucose and lipid metabolism.
- Cardiac hypertrophy was observed in a mouse model with an ADIPOR1 variant, and was rescued by rapamycin.
Conclusions:
- ADIPOR1 variants can cause hypertrophic cardiomyopathy.
- ADIPOR1 plays a role in regulating cardiac function and metabolism.
- These findings offer new insights into the pathogenesis of HCM.
Abstract:
Hypertrophic cardiomyopathy (HCM) is a heterogeneous genetic heart muscle disease characterized by hypertrophy with preserved or increased ejection fraction in the absence of secondary causes. However, recent studies have demonstrated that a substantial proportion of individuals with HCM also have comorbid diabetes mellitus (~10%). Whether genetic variants may contribute a combined phenotype of HCM and diabetes mellitus is not known. Here, using next-generation sequencing methods, we identified novel and ultrarare variants in adiponectin receptor 1 (ADIPOR1) as risk factors for HCM. Biochemical studies showed that ADIPOR1 variants dysregulate glucose and lipid metabolism and cause cardiac hypertrophy through the p38/mammalian target of rapamycin and/or extracellular signal-regulated kinase pathways. A transgenic mouse model expressing an ADIPOR1 variant displayed cardiomyopathy that recapitulated the cellular findings, and these features were rescued by rapamycin. Our results provide the first evidence that ADIPOR1 variants can cause HCM and provide new insights into ADIPOR1 regulation.
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