کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9018407 | 1128703 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Differential effects of the organochlorine pesticide DDT and its metabolite p,pâ²-DDE on p-glycoprotein activity and expression
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
بهداشت، سم شناسی و جهش زایی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Differential effects of the organochlorine pesticide DDT and its metabolite p,pâ²-DDE on p-glycoprotein activity and expression Differential effects of the organochlorine pesticide DDT and its metabolite p,pâ²-DDE on p-glycoprotein activity and expression](/preview/png/9018407.png)
چکیده انگلیسی
1,1-Bis(4-chlorophenyl)-2,2,2-trichloroethane (DDT) is an organochlorine pesticide. Its metabolite, 1,1-dichloro-2,2-bis(p-chlorophenyl)-ethene (p,pâ²-DDE) is a persistent environmental contaminant and both compounds accumulate in animals. Because multidrug resistance transporters, such as p-glycoprotein, function as a defense against xenobiotic exposure, we analyzed the ability of DDT and p,pâ²-DDE to act as efflux modulators. Using a competitive intact cell assay based on the efflux of the fluorescent dye rhodamine 123, we found that DDT, but not p,pâ²-DDE, stimulated dye retention. Subsequent studies using verapamil as competitor suggested that DDT is a weak p-glycoprotein inhibitor. Further studies addressed the ability of DDT and p,pâ²-DDE to induce MDR1, the gene encoding p-glycoprotein. In HepG2 cells, we found that both compounds induced MDR1 by twofold to threefold. Similar results were observed in mouse liver after a single dose of p,pâ²-DDE, although some gender-specific induction differences were noted. By contrast, p,pâ²-DDE failed to induce MDR1 in HeLa cells, indicating some cell-specific effects for induction. Further expression studies demonstrated increased levels of the endoplasmic reticulum molecular chaperone, Bip, in response to DDT, but not p,pâ²-DDE. These results suggest that DDT, but not p,pâ²-DDE, induces an endoplasmic reticulum stress response.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Toxicology and Applied Pharmacology - Volume 203, Issue 2, 1 March 2005, Pages 91-98
Journal: Toxicology and Applied Pharmacology - Volume 203, Issue 2, 1 March 2005, Pages 91-98
نویسندگان
Arsalan Shabbir, Susan DiStasio, Jingbo Zhao, Christopher P. Cardozo, Mary S. Wolff, Avrom J. Caplan,