کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6041239 1189279 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
PYGM expression analysis in white blood cells: A complementary tool for diagnosing McArdle disease?
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب تکاملی
پیش نمایش صفحه اول مقاله
PYGM expression analysis in white blood cells: A complementary tool for diagnosing McArdle disease?
چکیده انگلیسی
McArdle disease is caused by an inherited deficiency of the enzyme myophosphorylase, resulting in exercise intolerance from childhood and acute crises of early fatigue and contractures. In severe cases, these manifestations can be accompanied by rhabdomyolysis, myoglobinuria, and fatal renal failure. Diagnosis of McArdle disease is based on clinical diagnostic tests, together with an absence of myophosphorylase activity in skeletal muscle biopsies and genetic analysis of the myophosphorylase-encoding gene, PYGM. The recently reported association between myophosphorylase and Rac1 GTPase in a T lymphocyte cell line prompted us to study myophosphorylase expression in white blood cells (WBCs) from 20 healthy donors and 30 McArdle patients by flow cytometry using a fluorescent-labeled PYGM antibody. We found that T lymphocytes expressed myophosphorylase in healthy donors, but expression was significantly lower in McArdle patients (p < 0.001). PYGM mRNA levels were also lower in white blood cells from McArdle patients. Nevertheless, in 13% of patients (who were either heterozygotes or homozygotes for the most common PYGM pathogenic mutation among Caucasians (p.R50X)), the percentage of myophosphorylase-positive white blood cells was not different compared with the control group. Our findings suggest that analysis of myophosphorylase expression in white blood cells might be a useful, less-invasive, complementary test for diagnosing McArdle disease.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuromuscular Disorders - Volume 24, Issue 12, December 2014, Pages 1079-1086
نویسندگان
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