کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9001427 | 1118516 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Up-regulation of Mrp4 expression in kidney of Mrp2-deficient TRâ rats
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کلمات کلیدی
PAHCyPUGTMRPMrp2MRP4bDNABranched DNA - DNA انشعابp-Aminohippurate - p-aminohippurateUDP-glucuronosyltransferase - UDP-گلوکورونوسیل ترانسفرازUp-regulation - تنظیم بالاCytochrome P450 - سیتوکروم پی۴۵۰Gunn rat - موش گانmultidrug resistance-associated protein - پروتئین مرتبط با مقاومت چند داروییKidney - کلیه
موضوعات مرتبط
علوم پزشکی و سلامت
داروسازی، سم شناسی و علوم دارویی
داروشناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Multidrug resistance-associated proteins (Mrps) are a group of ATP-dependent efflux transporters for organic anions. Mrp2 and Mrp4 are co-localized to the apical (brush-border) membrane domain of renal proximal tubules, where they may function together in the urinary excretion of organic anions. Previous reports showed that urinary excretion of some organic anions is not impaired in transport-deficient (TRâ) rats, which lack Mrp2, suggesting that up-regulation of other transporter(s) may compensate for the loss of Mrp2 function. The purpose of this study was to determine whether Mrp4 expression in kidney is altered in TRâ rats. Mrp4 mRNA expression was quantified using the high-throughput branched DNA signal amplification assay. Mrp4 protein expression was determined by Western blot and immunohistochemical analysis. Mrp4 mRNA in kidney of TRâ rats was 100% higher than normal Wistar rats. Western blot analysis showed a 200% increase in Mrp4 protein expression in kidney of the mutant rats compared to normal rats. Immunohistochemical analysis of Mrp4 protein demonstrated apical localization of Mrp4 on renal proximal tubules, and that the immunoreactivity was more intense in kidney sections from TRâ rats than those from normal rats. In summary, the results of the present study demonstrate that renal Mrp4 expression is up-regulated in TRâ rats, which may explain why urinary excretion of some organic anions remains normal in the mutant rats.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical Pharmacology - Volume 70, Issue 7, 1 October 2005, Pages 1088-1095
Journal: Biochemical Pharmacology - Volume 70, Issue 7, 1 October 2005, Pages 1088-1095
نویسندگان
Chuan Chen, Angela L. Slitt, Mathew Z. Dieter, Yuji Tanaka, George L. Scheffer, Curtis D. Klaassen,