کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1938236 1050736 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tryptanthrin inhibits MDR1 and reverses doxorubicin resistance in breast cancer cells
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Tryptanthrin inhibits MDR1 and reverses doxorubicin resistance in breast cancer cells
چکیده انگلیسی

Development of agents to overcome multidrug resistance (MDR) is important in cancer chemotherapy. Up to date, few chemicals have been reported to down-regulate MDR1 gene expression. We evaluated the effect of tryptanthrin on P-glycoprotein (P-gp)-mediated MDR in a breast cancer cell line MCF-7. Tryptanthrin could depress overexpression of MDR1 gene. We observed reduction of P-gp protein in parallel with decreases in mRNA in MCF-7/adr cells treated with tryptanthrin. Tryptanthrin suppressed the activity of MDR1 gene promoter. Tryptanthrin also enhanced interaction of the nuclear proteins with the negatively regulatory CAAT region of MDR1 gene promoter in MCF-7/adr. It might result in suppression of MDR1 gene. In addition, tryptanthrin decreased the amount of mutant p53 protein with decreasing mutant p53 protein stability. It might contribute to negative regulation of MDR1 gene. In conclusion, tryptanthrin exhibited MDR reversing effect by down-regulation of MDR1 gene and might be a new adjuvant agent for chemotherapy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 358, Issue 1, 22 June 2007, Pages 79–84
نویسندگان
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