Résumé
<p><b>OBJECTIVE</b>To identify the casual mutation of a Chinese pedigree with hypertrophic cardiomyopathy (HCM), and to analyze the genotype-phenotype relationship.</p><p><b>METHODS</b>The coding exons of 26 reported disease genes were sequenced by targeted resequencing in the proband and the identified mutation were detected with bi-directional Sanger sequencing in all family members and 307 healthy controls. The genotype-phenotype correlation was analyzed in the family.</p><p><b>RESULTS</b>A missense mutation (c.2191C > T, p. Pro731Ser) in the 20th exon of MYH7 gene was identified. This mutation was absent in 307 healthy controls and predicted to be pathogenic by PolyPhen-HCM. Totally 13 family members carried this mutation, including 10 patients with HCM and 3 asymptomatic mutation carriers. The proband manifested severe congestive heart failure and 8 patients expressed various clinical manifestations of heart failure, including dyspnea, palpitations, chest pain, amaurosis or syncope. Five patients were diagnosed as HCM at the age of 16 or younger. One family member suffered sudden cardiac death.</p><p><b>CONCLUSIONS</b>The Pro731Ser of MYH7 gene mutation is a causal and malignant mutation linked with familiar HCM.</p>
Sujets)
Adolescent , Humains , Asiatiques , Séquence nucléotidique , Cardiomyopathie hypertrophique , Ethnologie , Génétique , Mort subite cardiaque , Exons , Mutation faux-sens , Chaînes lourdes de myosine , Génétique , Pedigree , Phénotype , Plan de recherche , Myosines ventriculairesRésumé
This paper validated the centrode of six-bar mechanism was similar to circle center curve for different bending radius of the lemur, and introduced the gait analysis of knee joint of six-bar mechanism in normal movement t oprovide theoretical design foundation for developing a new knee joint.