کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3080780 1189353 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nuclear changes in skeletal muscle extend to satellite cells in autosomal dominant Emery-Dreifuss muscular dystrophy/limb-girdle muscular dystrophy 1B
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب تکاملی
پیش نمایش صفحه اول مقاله
Nuclear changes in skeletal muscle extend to satellite cells in autosomal dominant Emery-Dreifuss muscular dystrophy/limb-girdle muscular dystrophy 1B
چکیده انگلیسی

Autosomal forms of Emery-Dreifuss muscular dystrophy (AD-/AR-EDMD) and limb-girdle muscular dystrophy type 1B (LGMD1B) are caused by mutations in the gene encoding A-type lamins (LMNA). A-type lamins are major components of nuclear lamina and known to have important roles in maintaining nuclear integrity. LMNA mutations are also suggested to cause reduced myogenic differentiation potentials, implying that satellite cell nuclei in AD-EDMD/LGMD1B are likewise affected. We examined nuclear changes of skeletal muscles including satellite cells from four patients with AD-EDMD/LGMD1B by light and electron microscopy. We found that 92.5 ± 5.0% of myonuclei had structural abnormalities, including shape irregularity and/or chromatin disorganization, and the presence of peri-/intranuclear vacuoles. Chromatin changes were also observed in 50% of the satellite cell nuclei. Increased number of Pax7-positive nuclei, but fewer number of MyoD-positive nuclei were seen on immunohistochemical analyses, suggesting functional alteration of satellite cells in addition to the nuclear morphological changes in AD-EDMD/LGMD1B.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuromuscular Disorders - Volume 19, Issue 1, January 2009, Pages 29–36
نویسندگان
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