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Am J Med Genet A. 2013 Aug;161A(8):2040-6. doi: 10.1002/ajmg.a.36056. Epub 2013 Jul 3.

A mutation in TGFB3 associated with a syndrome of low muscle mass, growth retardation, distal arthrogryposis and clinical features overlapping with Marfan and Loeys-Dietz syndrome.

Author information

1
Children's Hospital Oakland Research Institute, Oakland, CA 94070, USA. hrienhoff@datahooks.com

Abstract

The transforming growth factor β (TGF-β) family of growth factors are key regulators of mammalian development and their dysregulation is implicated in human disease, notably, heritable vasculopathies including Marfan (MFS, OMIM #154700) and Loeys-Dietz syndromes (LDS, OMIM #609192). We described a syndrome presenting at birth with distal arthrogryposis, hypotonia, bifid uvula, a failure of normal post-natal muscle development but no evidence of vascular disease; some of these features overlap with MFS and LDS. A de novo mutation in TGFB3 was identified by exome sequencing. Several lines of evidence indicate the mutation is hypomorphic suggesting that decreased TGF-β signaling from a loss of TGFB3 activity is likely responsible for the clinical phenotype. This is the first example of a mutation in the coding portion of TGFB3 implicated in a clinical syndrome suggesting TGFB3 is essential for both human palatogenesis and normal muscle growth.

KEYWORDS:

Loeys-Dietz syndrome; Marfan syndrome; bifid uvula; de novo mutation; distal arthrogryposis; exome sequencing; hyomyoplasia; low muscle mass; transforming growth factor beta

PMID:
23824657
PMCID:
PMC3885154
DOI:
10.1002/ajmg.a.36056
[Indexed for MEDLINE]
Free PMC Article
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