کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2571902 1561183 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of αvβ5 integrin receptor in endocytosis of crocidolite and its effect on intracellular glutathione levels in human lung epithelial (A549) cells
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست بهداشت، سم شناسی و جهش زایی
پیش نمایش صفحه اول مقاله
Role of αvβ5 integrin receptor in endocytosis of crocidolite and its effect on intracellular glutathione levels in human lung epithelial (A549) cells
چکیده انگلیسی

Crocidolite, containing 27% iron by weight, is the most carcinogenic form of asbestos. Crocidolite fibers are endocytized by αvβ5 integrin receptors in rabbit pleural mesothelial cells. We show here that crocidolite fibers are endocytized in human lung epithelial (A549) cells and in primary small airway epithelial (SAEC) cells. Presence of the integrin αvβ5 blocking antibody, P1F6, significantly reduced the uptake of crocidolite fibers in A549 cells. Thus, the integrin αvβ5 receptor is involved in endocytosis of crocidolite fibers in A549 cells as well.Previously, it has been observed that asbestos fibers lead to changes in the intracellular redox environment, i.e. a marked decrease in intracellular glutathione concentrations and an increase in the extracellular glutathione in A549 cells. In addition, the decrease in intracellular glutathione was found to be largely independent of iron present on the surface of the fiber. A549 cells were treated with crocidolite in the presence of endocytosis inhibitor cytochalasin D. Our data indicate that, upon preventing endocytosis, we were able to reverse the decrease in total intracellular glutathione. The decrease in total intracellular glutathione could also be prevented in the presence of the monoclonal antibody P1F6. Thus, we observed that endocytosis of crocidolite fibers via integrin αvβ5 receptor is linked to the marked decrease in total intracellular glutathione in A549 cells.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Toxicology and Applied Pharmacology - Volume 210, Issues 1–2, January 2006, Pages 70–77
نویسندگان
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