کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10767985 1050802 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spontaneous DNA repair in human mononuclear cells is calcium-dependent
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Spontaneous DNA repair in human mononuclear cells is calcium-dependent
چکیده انگلیسی
Spontaneous DNA repair in peripheral blood mononuclear cells (PBMC) has been recently described. The aim of this study was to evaluate whether spontaneous DNA repair is Ca2+-dependent, as in vitro-stimulated DNA repair. Spontaneous DNA repair in PBMC was measured in a 1 mM Ca2+ medium. The effect of extracellular Ca2+ chelation by EGTA, intracellular Ca2+ chelation by bapta-AM, and Ca2+ loading by the ionophore A23187 was examined. The signal transduction pathway was evaluated by inhibiting protein tyrosine kinase with genistein, calmodulin with W7, and calcineurin with cyclosporin A and tacrolimus. Extracellular Ca2+ chelation had no effect on spontaneous DNA repair, while both intracellular chelation and calcium overloading inhibited the DNA repair. Inhibition of protein tyrosine kinase, calmodulin or calcineurin reduced DNA repair. In conclusion, spontaneous DNA repair is mainly Ca2+-dependent at a narrow range of intracellular Ca2+ concentrations. The signal transduction cascade includes protein tyrosine kinase, calmodulin, and calcineurin.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 336, Issue 3, 28 October 2005, Pages 842-846
نویسندگان
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