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[Familiar hypertrophic cardiomyopathy caused by a IVS15-1G > A mutation in cardiac myosin-binding protein C gene]

Yu-bao Zou, Ji-zheng Wang, Ge-ru Wu, Lei Song, Shu-xia Wang, Hui Yu, Qian Zhang, Hu Wang, Ru-tai Hui
Zhonghua Xin Xue Guan Bing za Zhi 2006, 34 (8): 699-702
17081393

OBJECTIVE: To detect the disease-causing gene mutation of hypertrophic cardiomyopathy (HCM) in a Chinese family and to analyze the correlation of the genotype and the phenotype.

METHODS: One family affected with HCM was studied. The clinical data including symptom, physical examination, echocardiography and electrocardiography were collected. The full encoding exons and flanking sequences of beta-myosin heavy chain gene (MYH7) and cardiac myosin-binding protein C gene (MYBPC3) were amplified with PCR and the products were sequenced.

RESULTS: A G8887A mutation, which is an acceptor splicing site of intron 15 (IVS15-1G > A) in MYBPC3 (gi: Y10129) was identified in 6 out of 11 family members. Three mutation carriers developed HCM at 48 - 75 years old with mild chest pain, chest distress and asymmetric septal hypertrophy (13 - 14 mm) and remaining mutation carriers are free of HCM. No mutation was identified in MYH7 gene.

CONCLUSION: HCM caused by the IVS15-1G > A mutation is a benign phenotype. It is helpful to screen MYBPC3 gene mutation in late-onset HCM patients with mild symptoms.

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