PMID- 10399756 OWN - NLM STAT- MEDLINE DCOM- 19990901 LR - 20191024 IS - 0960-8966 (Print) IS - 0960-8966 (Linking) VI - 9 IP - 4 DP - 1999 Jun TI - A novel de novo mutation in the triple helix of the COL6A3 gene in a two-generation Italian family affected by Bethlem myopathy. A diagnostic approach in the mutations' screening of type VI collagen. PG - 264-71 AB - Bethlem myopathy is an autosomal dominant inherited disease producing a mild neuromuscular disorder, characterized mainly by muscular weakness and multiple joint contractures. Bethlem myopathy is caused by mutations in one of the three chains of collagen type VI. Here we report the clinical description and the molecular characterization of the defect in a two-generation Italian family in which a Gly-->Arg substitution disrupts the triple helix structure of the alpha 3 chain of collagen type VI, an ubiquitous glycoprotein of the extracellular matrix. In this family the identification of the mutation also allowed one to exclude the disease in the grandfather. It is noteworthy that the father of the proband carries a de novo mutation, the first described for Bethlem myopathy. FAU - Pepe, G AU - Pepe G AD - Department of Biology, University of Rome Tor Vergata, Italy. pepe@bio.uniroma2.it FAU - Bertini, E AU - Bertini E FAU - Giusti, B AU - Giusti B FAU - Brunelli, T AU - Brunelli T FAU - Comeglio, P AU - Comeglio P FAU - Saitta, B AU - Saitta B FAU - Merlini, L AU - Merlini L FAU - Chu, M L AU - Chu ML FAU - Federici, G AU - Federici G FAU - Abbate, R AU - Abbate R LA - eng GR - AR38912/AR/NIAMS NIH HHS/United States GR - AR38923/AR/NIAMS NIH HHS/United States PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Neuromuscul Disord JT - Neuromuscular disorders : NMD JID - 9111470 RN - 63231-63-0 (RNA) RN - 9007-34-5 (Collagen) RN - 9007-49-2 (DNA) SB - IM MH - Adult MH - Amino Acid Substitution/genetics MH - Cells, Cultured MH - Child MH - Collagen/*genetics MH - DNA/chemistry/*genetics MH - DNA Mutational Analysis MH - Female MH - Fibroblasts MH - Heteroduplex Analysis MH - Humans MH - Male MH - Muscle, Skeletal/pathology MH - Mutation/*genetics MH - Neuromuscular Diseases/*diagnosis/*genetics/pathology MH - Pedigree MH - Polymorphism, Genetic MH - RNA/genetics/isolation & purification MH - Reverse Transcriptase Polymerase Chain Reaction MH - Sequence Analysis, DNA MH - Skin/pathology EDAT- 1999/07/10 00:00 MHDA- 1999/07/10 00:01 CRDT- 1999/07/10 00:00 PHST- 1999/07/10 00:00 [pubmed] PHST- 1999/07/10 00:01 [medline] PHST- 1999/07/10 00:00 [entrez] AID - S0960-8966(99)00014-0 [pii] AID - 10.1016/s0960-8966(99)00014-0 [doi] PST - ppublish SO - Neuromuscul Disord. 1999 Jun;9(4):264-71. doi: 10.1016/s0960-8966(99)00014-0.