Genotype impacts survival in Marfan syndrome

European Heart Journal
Romy FrankenBarbara J M Mulder

Abstract

The aorta in Marfan syndrome (MFS) patients is variably affected. We investigated the assumed genotype-effect on protein production as a risk factor for a severe aortic phenotype in adult MFS patients. We collected clinical and genetic data from all 570 adults with MFS who had been included in the Dutch CONgenital CORvitia registry since the start in 2001. Mean age was 36.5 ± 13.5 years (51.2% male, 28.9% prior aortic surgery, 8.2% prior aortic dissection). Patients were prospectively followed for a mean duration of 8.2 ± 3.1 years. Men had more frequently aortic surgery at baseline (38.0 vs. 19.4%, P < 0.001) and during follow-up (24.0 vs. 15.1%, P = 0.008) compared with women. After 10-year follow-up cumulative survival was 93.8% and dissection-free survival was 84.2%. We found a pathogenic FBN1 mutation in 357 patients, of whom 146 patients (40.9%) were positive for a mutation causing haploinsufficiency (reduced fibrillin-1 protein) and 211 (59.1%) for a mutation leading to a DN effect (abnormal fibrillin-1 protein). Corrected for age, sex, and previous aortic complications, patients with a haploinsufficient (HI) mutation had a 2.5-fold increased risk for cardiovascular death (hazard ratio, HR: 2.5, 95% CI: 1.0-6.1, P = 0.04...Continue Reading

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