کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4012522 1261198 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High glucose concentration induces elevated expression of anti-oxidant and proteolytic enzymes in cultured human retinal pigment epithelial cells
موضوعات مرتبط
علوم زیستی و بیوفناوری ایمنی شناسی و میکروب شناسی ایمونولوژی و میکروب شناسی (عمومی)
پیش نمایش صفحه اول مقاله
High glucose concentration induces elevated expression of anti-oxidant and proteolytic enzymes in cultured human retinal pigment epithelial cells
چکیده انگلیسی

We investigated the differential protein expression patterns of retinal pigment epithelial (RPE) cells exposed to increased glucose concentrations. Cultured human RPE cells (ARPE-19) were exposed for 4 days with normal blood glucose concentration (5.5 mM d-glucose), followed by exposure to either normal (5.5 mM) or high (33 mM) concentrations of d-glucose for 48 h. Protein extracts of glucose-treated RPE cells were then subjected to comparative proteome analysis based on 2-D gel electrophoresis. Protein spots were visualized by silver staining. The differentially expressed proteins were excised and digested in-gel with trypsin, then analysed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). The expression levels of cathepsin B, glutathione peroxidase and heat shock protein 27 were increased, and that of protein disulfide isomerase decreased in high glucose treated RPE compared to normal glucose. The isoelectric point of copper/zinc-containing superoxide dismutase (Cu/Zn-SOD) shifted toward acidic region in response to high glucose. Cu/Zn-SOD activity in high glucose group was significantly lower than that in normal glucose group (P < 0.05, Mann–Whitney U-test). Systematic survey of protein expression has revealed that RPE cells respond to acute, pathologically high glucose levels by the elevated expression of anti-oxidant and proteolytic enzymes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Eye Research - Volume 83, Issue 3, September 2006, Pages 602–609
نویسندگان
, , , , , , , , ,