Hypertrophic cardiomyopathy (HCM), a common genetic heart disorder, is often caused by mutations in sarcomere-related genes. While extensively studied in European populations, its genetic basis in Chinese individuals remains poorly understood.
In a groundbreaking cross-sectional study, researchers from West China Hospital and the University of Birmingham analyzed whole-exome sequencing data from 593 Chinese and 1,232 UK HCM patients, along with controls. They found that Chinese patients carry a significantly higher burden of rare variants (52.8% vs. 13.6% in the UK), yet the proportion of pathogenic or likely pathogenic (P/LP) variants was similar between the two groups.
Notably, two mutations—MYBPC3 c.3624del and TNNT2 c.300C>G—were identified as specific to the Chinese cohort, accounting for 2.9% and 1.5% of cases, respectively. The study also uncovered stronger associations with thin filament and myosin light chain genes in Chinese patients, while MYBPC3 non-truncating variants were more prominent in the UK cohort.
Using the tool genebe , researchers reduced the rate of variants of uncertain significance (VUS) to 46.8%, outperforming other classification tools and improving diagnostic clarity.
These findings underscore the importance of ethnicity-specific genetic databases and refined interpretation frameworks to avoid misclassification and enhance clinical management of HCM across diverse populations.
Precision Clinical Medicine
Experimental study
Not applicable
Genetic architecture of hypertrophic cardiomyopathy in individuals of Chinese and United Kingdom ancestry
24-Jul-2025