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Intragenic deletion of TRIM32 in compound heterozygotes with sarcotubular myopathy/LGMD2H
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2009 (English)In: Human Mutation, ISSN 1059-7794, E-ISSN 1098-1004, Vol. 30, no 9, E831-E844 p.Article in journal (Refereed) Published
Abstract [en]

In 2005 the commonality of sarcotubular myopathy (STM) and limb girdle muscular dystrophy type 2H (LGMD2H) was demonstrated, as both are caused by the p D487N missense mutation in TRIM32 originally found in the Manitoba Hutterite population. Recently, three novel homozygous TRIM32 mutations have been described in LGMD patients. Here we describe a three generation Swedish family clinically presenting with limb girdle muscular weakness and histological features of a microvacuolar myopathy. The two index patients were compound heterozygotes for a frameshift mutation in TRIM32 (c.1560delC ) and a 30 kb intragenic deletion, encompassing parts of intron 1 and the entire exon 2 of TRIM32. In these patients, no full-length or truncated TRIM32 could be detected. Interestingly, heterozygous family members carrying only one mutation showed mild clinical symptoms and vacuolar changes in muscle. In our family, the phenotype encompasses additionally a mild demyelinating polyneuropathic syndrome. Thus STM and LGMD2H are the result of loss of function mutations that can be either deletions or missense mutations. (c) 2009 Wiley-Liss, Inc.

Place, publisher, year, edition, pages
2009. Vol. 30, no 9, E831-E844 p.
Keyword [en]
TRIM32, LGMD2H, muscular dystrophy, sarcotubular myopathy
National Category
Medical and Health Sciences
URN: urn:nbn:se:umu:diva-24119DOI: 10.1002/humu.21063PubMedID: 19492423OAI: diva2:226102
Available from: 2009-06-30 Created: 2009-06-30 Last updated: 2011-12-01Bibliographically approved

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