کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2067917 | 1077918 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dexamethasone has pro-apoptotic effects on non-activated fresh peripheral blood mononuclear cells
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
بیوفیزیک
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چکیده انگلیسی
Apoptosis is a physiological method of cell death commonly referred to as programmed cell death. However, non-apoptotic programmed cell death, such as autophagy and programmed necrosis, has been characterized by morphological criteria. In view of the human therapeutic use of DEX, and considering that no difference in the number and/or affinity of glucocorticoid receptors in activated and non-activated lymphocytes has been reported, we decided to evaluate the effect of DEX on fresh peripheral blood mononuclear cells (PBMC). Transmission electron microscopy showed that DEX can significantly induce apoptosis in non-activated PBMC. It was also observed by transmission electron microscopy that, independently of DEX treatment, PBMC also died by a process marked by extreme vacuolization and increase in cellular volume; these cells were erroneously classified as viable by flow cytometry using the 7-AAD assay. It is concluded that the DEX pro-apoptotic effect is not restricted to activated PBMC and, therefore, DEX-induced apoptosis could play either homeostatic (activated PBMC) or immunosuppressive (non-activated PBMC) roles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cell Biology International - Volume 30, Issue 2, February 2006, Pages 133-137
Journal: Cell Biology International - Volume 30, Issue 2, February 2006, Pages 133-137
نویسندگان
Paulo Renato Rivas Totino, Evelyn Kety Pratt Riccio, Suzana Corte-Real, Cláudio Tadeu Daniel-Ribeiro, Maria de Fátima Ferreira-da-Cruz,