کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5525221 | 1546667 | 2017 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Original ArticleBZML, a novel colchicine binding site inhibitor, overcomes multidrug resistance in A549/Taxol cells by inhibiting P-gp function and inducing mitotic catastrophe Original ArticleBZML, a novel colchicine binding site inhibitor, overcomes multidrug resistance in A549/Taxol cells by inhibiting P-gp function and inducing mitotic catastrophe](/preview/png/5525221.png)
- BZML, as a novel CBSIs, has broad spectrum cytotoxic activity against various chemo-sensitive or -resistant cancer cells.
- BZML is not a P-gp substrate and acts as an irreversible inhibitor of P-gp function in A549/Taxol cells.
- BZML causes mitosis phase arrest by inhibiting tubulin polymerization in A549 and A549/Taxol cells.
- BZML induces MC in A549/Taxol cells, which is different from apoptosis in A549 cells, to against apoptosis-resistance.
Multidrug resistance (MDR) interferes with the efficiency of chemotherapy. Therefore, developing novel anti-cancer agents that can overcome MDR is necessary. Here, we screened a series of colchicine binding site inhibitors (CBSIs) and found that 5-(3, 4, 5-trimethoxybenzoyl)-4-methyl-2-(p-tolyl) imidazol (BZML) displayed potent cytotoxic activity against both A549 and A549/Taxol cells. We further explored the underlying mechanisms and found that BZML caused mitosis phase arrest by inhibiting tubulin polymerization in A549 and A549/Taxol cells. Importantly, BZML was a poor substrate for P-glycoprotein (P-gp) and inhibited P-gp function by decreasing P-gp expression at the protein and mRNA levels. Cell morphology changes and the expression of cycle- or apoptosis-related proteins indicated that BZML mainly drove A549/Taxol cells to die by mitotic catastrophe (MC), a p53-independent apoptotic-like cell death, whereas induced A549 cells to die by apoptosis. Taken together, our data suggest that BZML is a novel colchicine binding site inhibitor and overcomes MDR in A549/Taxol cells by inhibiting P-gp function and inducing MC. Our study also offers a new strategy to solve the problem of apoptosis-resistance.
Journal: Cancer Letters - Volume 402, 28 August 2017, Pages 81-92