BACKGROUND: No data are available on survival analysis and longitudinal evolution of patients with gene mutations of beta-myosin heavy chain (MYH7) and myosin binding protein C (MYBPC3) in Chinese. HYPOTHESIS: To prospectively investigate whether different gene mutations confer distinct prognosis. METHODS: We performed a prospective study in 70 HCM patients and 46 genetically affected family members without HCM-phenotype with direct DNA sequencing of MYH7 and MYBPC3, clinical assessments, and 5.8 +/- 1.8 years follow-up. RESULTS: After follow-up, more surgical intervention (8/52 versus 0/18, p < 0.001), higher sudden death risk (7/52 versus 0/18, p < 0.001) and shorter life span were found in patients with MYH7 mutations than in patients with MYBPC3 mutations (45.1 +/- 14.0 versus 73.5 +/- 7.5 years, p = 0.03). Seven of the 27 mutation carriers of MYH7 had clinical presentations of HCM, but no carriers of MYBPC3 mutations developed to HCM during follow-up. Maximal wall thickness was thicker in the patients carrying mutations in the global region of MYH7 than in those carrying mutations in the rod region of MYH7 (21.5 +/- 6.6 versus 15 +/- 6.1 mm, p < 0.05) at baseline. More sudden death (7/41 versus 0/11) and left ventricular dysfunction (NYHA Class III approximately IV, 17/32 versus 1/10) were identified in patients with mutations in the global region of MYH7 than in patients with other mutations. CONCLUSIONS: MYH7 mutations, especially in the global region, cause malignant clinical phenotypes.
BACKGROUND: No data are available on survival analysis and longitudinal evolution of patients with gene mutations of beta-myosin heavy chain (MYH7) and myosin binding protein C (MYBPC3) in Chinese. HYPOTHESIS: To prospectively investigate whether different gene mutations confer distinct prognosis. METHODS: We performed a prospective study in 70 HCM patients and 46 genetically affected family members without HCM-phenotype with direct DNA sequencing of MYH7 and MYBPC3, clinical assessments, and 5.8 +/- 1.8 years follow-up. RESULTS: After follow-up, more surgical intervention (8/52 versus 0/18, p < 0.001), higher sudden death risk (7/52 versus 0/18, p < 0.001) and shorter life span were found in patients with MYH7 mutations than in patients with MYBPC3 mutations (45.1 +/- 14.0 versus 73.5 +/- 7.5 years, p = 0.03). Seven of the 27 mutation carriers of MYH7 had clinical presentations of HCM, but no carriers of MYBPC3 mutations developed to HCM during follow-up. Maximal wall thickness was thicker in the patients carrying mutations in the global region of MYH7 than in those carrying mutations in the rod region of MYH7 (21.5 +/- 6.6 versus 15 +/- 6.1 mm, p < 0.05) at baseline. More sudden death (7/41 versus 0/11) and left ventricular dysfunction (NYHA Class III approximately IV, 17/32 versus 1/10) were identified in patients with mutations in the global region of MYH7 than in patients with other mutations. CONCLUSIONS:MYH7 mutations, especially in the global region, cause malignant clinical phenotypes.
Authors: Farbod Sedaghat-Hamedani; Elham Kayvanpour; Oguz Firat Tugrul; Alan Lai; Ali Amr; Jan Haas; Tanja Proctor; Philipp Ehlermann; Katrin Jensen; Hugo A Katus; Benjamin Meder Journal: Clin Res Cardiol Date: 2017-08-24 Impact factor: 5.460
Authors: Bo Wang; Jing Wang; Li-Feng Wang; Fan Yang; Lei Xu; Wen-Xia Li; Yang He; Lei Zuo; Qian-Li Yang; Hong Shao; Dan Hu; Li-Wen Liu Journal: Mol Med Rep Date: 2019-10-16 Impact factor: 2.952