A novel, blood-based diagnostic assay for limb girdle muscular dystrophy 2B and Miyoshi myopathy.
Limb girdle muscular dystrophy 2B and Miyoshi myopathy were recently found to be allelic disorders arising from defects in the dysferlin gene. We have developed a new diagnostic assay for limb girdle muscular dystrophy 2B and Miyoshi myopathy, which screens for dysferlin expression in blood using a commercially available monoclonal antibody. Unlike current methods that require muscle biopsy for immunodiagnosis, the new method is simple and entails a significantly less invasive procedure for tissue sampling. Moreover, it overcomes some of the problems associated with the handling and storage of muscle specimens. In our analysis of 12 patients with limb girdle muscular dystrophy 2B or Miyoshi myopathy, the findings obtained using the new assay are fully consistent with the results from muscle immunodiagnosis.
Ho
Mengfatt
M
Day Laboratory for Neuromuscular Research, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 2129, USA.
Gallardo
Eduard
E
McKenna-Yasek
Diane
D
De Luna
Noemi
N
Illa
Isabel
I
Brown
Robert H
RH
D000911:Antibodies, Monoclonal; D015152:Blotting, Northern; D000073939:Dysferlin; D015870:Gene Expression; D005820:Genetic Testing / Q000379:methods; D006801:Humans; D008565:Membrane Proteins; D009000:Monocytes / Q000737:chemistry; D009124:Muscle Proteins / Q000032:analysis / Q000235:genetics* / Q000276:immunology; D009136:Muscular Dystrophies / Q000097:blood / Q000175:diagnosis* / Q000235:genetics; D012333:RNA, Messenger / Q000032:analysis; D011933:Reagent Kits, Diagnostic
D000911:Antibodies, Monoclonal; C114839:DYSF protein, human; D000073939:Dysferlin; D008565:Membrane Proteins; D009124:Muscle Proteins; D012333:RNA, Messenger; D011933:Reagent Kits, Diagnostic