A Novel Founder Mutation in MYBPC3: Phenotypic Comparison With the Most Prevalent MYBPC3 Mutation in Spain

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• 作者：Mar&iacute ; a Sabater-Molina^a ; ^{mariasm79es@hotmail.com} ; Daniel Saura^b ; Esperanza Garc&iacute ; a-Molina Sá ; ez^a ; Josefa Gonzá ; lez-Carrillo^b ; Luis Polo^c ; Inmaculada Pé ; rez-Sá ; nchez^a ; Mar&iacute ; a del Carmen Olmo^b ; Mar&iacute ; a José ; Oliva-Sandoval^b ; Roberto Barriales-Villa^d ; Pablo Carbonell^e ; Domigo Pascual-Figal^b ; Juan R. Gimeno^b
• 关键词：Cardiomyopathy ; Hypertrophy ; MYBPC3 mutation ; Sudden death ; Truncated protein
• 刊名：Revista Española de Cardiología (English Edition)
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：70
• 期：2
• 页码：105-114
• 全文大小：530 K
• 卷排序：70

文摘

Mutations in MYBPC3 are the cause of hypertrophic cardiomyopathy (HCM). Although most lead to a truncating protein, the severity of the phenotype differs. We describe the clinical phenotype of a novel MYBPC3 mutation, p.Pro108Alafs*9, present in 13 families from southern Spain and compare it with the most prevalent MYBPC3 mutation in this region (c.2308 + 1 G > A).MethodsWe studied 107 relatives of 13 index cases diagnosed as HCM carriers of the p.Pro108Alafs*9 mutation. Pedigree analysis, clinical evaluation, and genotyping were performed.ResultsA total of 54 carriers of p.Pro108Alafs*9 were identified, of whom 39 had HCM. There were 5 cases of sudden death in the 13 families. Disease penetrance was greater as age increased and HCM patients were more frequently male and developed disease earlier than female patients. The phenotype was similar in p.Pro108Alafs*9 and in c.2308 + 1 G > A, but differences were found in several risk factors and in survival. There was a trend toward a higher left ventricular mass in p.Pro108Alafs*9 vs c.2308 + 1G > A. Cardiac magnetic resonance revealed a similar extent and pattern of fibrosis.ConclusionsThe p.Pro108Alafs*9 mutation is associated with HCM, high penetrance, and disease onset in middle age.