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Ann Clin Neurophysiol > Volume 11(2); 2009 > Article
Ann Clin Neurophysiol. 2009; 11(2): 59-63.
Identification of a Dysferlin Gene Mutation in One Patient Showing Clinical Manifestation of Miyoshi Myopathy
Myung-Goo Ji, Nam-Hee Kim, Dae-Seong Kim, and Young-Chul Choi
Copyright © 2009 The Korean Society of Clinical Neurophysiology
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Miyoshi myopathy (MM) is caused by the mutations of dysferlin gene (DYSF), which impairs the function of dysferlin protein causing muscle membrane dysfunction. We report a patient showing the MM phenotype who has a sister with LGMD 2B phenotype, along with the results of the immunohistochemical and molecular analyses of the DYSF gene. Immunohistochemical analysis noted negative immunoreactivity against dysferlin. Direct DNA sequencing of whole exons of DYSF gene revealed heterozygous nonsense mutations (c.610C>T + c.2494C>T). To our knowledge, this is the first reported MM case with this very combination of heterozygous mutations.
Key words: Miyoshi myopathy, Dysferlin, Dysferlinopathy
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