UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Exon skipping mutations in collagen VI are common and are predictive for severity and inheritance

Lampe, AK; Zou, Y; Sudano, D; O'Brien, KK; Hicks, D; Laval, SH; Charlton, R; ... Bonnemann, CG; + view all (2008) Exon skipping mutations in collagen VI are common and are predictive for severity and inheritance. HUM MUTAT , 29 (6) 809 - 822. 10.1002/humu.20704.

Full text not available from this repository.

Abstract

Mutations in the genes encoding collagen VI (COL6A1, COL6A2, and COL6A3) cause Bethlem myopathy (BM) and Ullrich congenital muscular dystrophy (UCMD), two related conditions of differing severity. BM is a relatively mild dominantly inherited disorder characterized by proximal weakness and distal joint contractures. UCMD was originally regarded as an exclusively autosomal recessive condition causing severe muscle weakness with proximal joint contractures and distal hyperlaxity. We and others have subsequently modified this model when we described UCMD patients with heterozygous in-frame deletions acting in a dominant-negative way. Here we report 10 unrelated patients with a UCMD clinical phenotype and de novo dominant negative heterozygous splice mutations in COL6A1, COL6A2, and COL6A3 and contrast our findings with four UCMD patients with recessively acting splice mutations and two BM patients with heterozygous splice mutations. We find that the location of the skipped exon relative to the molecular structure of the collagen chain strongly correlates with the clinical phenotype. Analysis by immunohistochemical staining of muscle biopsies and dermal fibroblast cultures, as well as immunoprecipitation to study protein biosynthesis and assembly, suggests different mechanisms each for exon skipping mutations underlying dominant UCMD, dominant BM, and recessive UCMD. We provide further evidence that de novo dominant mutations in severe UCMD occur relatively frequently in all three collagen VI chains and offer biochemical insight into genotype-phenotype correlations within the collagen VI-related disorders by showing that severity of the phenotype depends on the ability of mutant chains to be incorporated in the multimeric structure of collagen VI.

Type: Article
Title: Exon skipping mutations in collagen VI are common and are predictive for severity and inheritance
DOI: 10.1002/humu.20704
Keywords: collagen VI, COL6A1, COL6A2, COL6A3, Bethlem myopathy, Ullrich congenital muscular dystrophy, UCMD, exon skipping, CONGENITAL MUSCULAR-DYSTROPHY, MESSENGER-RNA DECAY, IN-FRAME DELETION, BETHLEM-MYOPATHY, ULLRICH-DISEASE, MATRIX DEPOSITION, TRIPLE-HELIX, COL6A1 GENE, DOMINANT, SECRETION
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Pop Health Sciences > UCL GOS Institute of Child Health
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Pop Health Sciences > UCL GOS Institute of Child Health > ICH Developmental Neurosciences Prog
URI: http://discovery.ucl.ac.uk/id/eprint/135260
Downloads since deposit
0Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item