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  • Title: Limb-girdle muscular dystrophy: diagnostic evaluation, frequency and clues to pathogenesis.
    Author: Lo HP, Cooper ST, Evesson FJ, Seto JT, Chiotis M, Tay V, Compton AG, Cairns AG, Corbett A, MacArthur DG, Yang N, Reardon K, North KN.
    Journal: Neuromuscul Disord; 2008 Jan; 18(1):34-44. PubMed ID: 17897828.
    Abstract:
    We characterized the frequency of limb-girdle muscular dystrophy (LGMD) subtypes in a cohort of 76 Australian muscular dystrophy patients using protein and DNA sequence analysis. Calpainopathies (8%) and dysferlinopathies (5%) are the most common causes of LGMD in Australia. In contrast to European populations, cases of LGMD2I (due to mutations in FKRP) are rare in Australasia (3%). We have identified a cohort of patients in whom all common disease candidates have been excluded, providing a valuable resource for identification of new disease genes. Cytoplasmic localization of dysferlin correlates with fiber regeneration in a subset of muscular dystrophy patients. In addition, we have identified a group of patients with unidentified forms of LGMD and with markedly abnormal dysferlin localization that does not correlate with fiber regeneration. This pattern is mimicked in primary caveolinopathy, suggesting a subset of these patients may also possess mutations within proteins required for membrane targeting of dysferlin.
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