Transcription-terminating mutation in telethonin causing autosomal recessive muscular dystrophy type 2G in a European patient

Montse Olivé, Alexey Shatunov, Laura Gonzalez, Olga Carmona, Dolores Moreno, Lidia Gonzalez Quereda, J A Martinez-Matos, Lev G Goldfarb, Isidro Ferrer

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

A 27-year-old woman of Moldavian origin presented at the age of 15 with progressive proximal limb weakness and painful cramps in her calf muscles. Clinical examination revealed prominent muscle weakness in proximal muscles of the lower extremities and distal anterior compartment of legs, and mild weakness in shoulder girdle muscles. In addition, she had marked calf hypertrophy, muscle atrophy involving the anterior and posterior compartments of the thighs, and the distal anterior compartment of legs, as well as mild scapular winging and hyperlordosis. A muscle biopsy taken from the biceps brachii showed mild dystrophic changes, absent vacuoles, and abundant lobulated fibers. Immunofluorescence and Western blot assays demonstrated complete telethonin deficiency. Molecular analysis revealed a homozygous Trp25X mutation in the telethonin (TCAP) gene resulting in termination of transcription at an early point. Four families from Brazil with telethonin deficiency have previously been reported and classified as LGMD2G, but the actual frequency of this disease is unknown. With this current identification of a case outside the Brazilian population, telethonin mutation-associated LGMD should be considered worldwide.

Original languageEnglish
Pages (from-to)929-33
Number of pages5
JournalNeuromuscular Disorders
Volume18
Issue number12
DOIs
Publication statusPublished - Dec 2008

Keywords

  • Adult
  • Base Sequence
  • Blotting, Western
  • Connectin
  • DNA Mutational Analysis
  • Female
  • Fluorescent Antibody Technique
  • Genes, Recessive
  • Humans
  • Muscle Proteins
  • Muscle Weakness
  • Muscular Atrophy
  • Muscular Dystrophies, Limb-Girdle
  • Mutation
  • Spain
  • Transcription, Genetic
  • Case Reports
  • Journal Article
  • Research Support, N.I.H., Intramural
  • Research Support, Non-U.S. Gov't

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