Abstract:Mutations in fibulin-4 (FBLN4), a matricellular gene required for extracellular matrix (ECM) assembly, result in autosomal recessive cutis laxa type 1B (ARCL1B), a syndrome characterized by loose skin, aortic aneurysms, pulmonary emphysema and skeletal abnormalities.Fbln4E57K/E57K mice recapitulated the phenotypes observed in ARCL1B. In particular, they exhibited ascending aortic aneurysms, elastic fiber fragmentation and increased stiffness in large arteries, and systolic hypertension. Surprisingly however, i… Show more
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