A dysfunctional desmin mutation in a patient with severe generalized myopathy

Ana M. Muñoz-Mármol, Geraldine Strasser, Marcos Isamat, Pierre A. Coulombe, Yanmin Yang, Xavier Roca, Elena Vela, José L. Mate, Jaume Coll, María Teresa Fernández-Figueras, José J. Navas-Palacios, Aurelio Ariza, Elaine Fuchs

Research output: Contribution to journalArticleResearchpeer-review

222 Citations (Scopus)

Abstract

Mice lacking desmin produce muscle fibers with Z disks and normal sarcomeric organization. However, the muscles are mechanically fragile and degenerate upon repeated contractions. We report here a human patient with severe generalized myopathy and aberrant intrasarcoplasmic accumulation of desmin intermediate filaments. Muscle tissue from this patient lacks the wild-type desmin allele and has a desmin gene mutation encoding a 7-aa deletion within the coiled-coil segment of the protein. We show that recombinant desmin harboring this deletion cannot form proper desmin intermediate filament networks in cultured cells, nor is it able to assemble into 10-nm filaments in vitro. These findings provide direct evidence that a mutation in desmin can cause human myopathies.
Original languageEnglish
Pages (from-to)11312-11317
JournalProceedings of the National Academy of Sciences of the United States of America
Volume95
Issue numbersup1
DOIs
Publication statusPublished - 15 Sep 1998

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