TAILIEUCHUNG - báo cáo khoa học: " Alcohol promotes breast cancer cell invasion by regulating the Nm23-ITGA5 pathway"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Alcohol promotes breast cancer cell invasion by regulating the Nm23-ITGA5 pathway | Journal of Experimental Clinical Cancer Research Wong et al. Journal of Experimental Clinical Cancer Research 2011 30 75 http content 30 1 75 RESEARCH Open Access Alcohol promotes breast cancer cell invasion by regulating the Nm23-ITGA5 pathway 1 2 2 2 3 3 Amy W Wong Qiwei X Paulson Jina Hong Renee E Stubbins Karen Poh Emily Schrader and Nomeli P Nunez1 2 Abstract Background Alcohol consumption is an established risk factor for breast cancer metastasis. Yet the mechanism by which alcohol promotes breast cancer metastases is unknown. The ability of cancer cells to invade through tissue barriers such as basement membrane and interstitial stroma is an essential step towards establishing cancer metastasis. In the present study we identify and examine the roles of two genes Nm23 and ITGA5 in alcohol-induced breast cancer cell invasion. Methods Human breast cancer T47D cells were treated with ethanol at various concentrations. Boyden chamber invasion assays were used to measure cellular invasive ability. The mRNA expression level of metastasis suppressor genes including Nm23 was determined by qRT-PCR. ITGA5 was identified using a qRT-PCR array of 84 genes important for cell-cell and cell-extracellular matrix interactions. Nm23 overexpression in addition to Nm23- and ITGA5 knock-down were used to determine the role of the Nm23-ITGA5 pathway on cellular invasive ability of T47D cells. Protein expression levels were verified by Western blot. Results Alcohol increased the invasive ability of human breast cancer T47D cells in a dose-dependent manner through the suppression of the Nm23 metastatic suppressor gene. In turn Nm23 down-regulation increased expression of fibronectin receptor subunit ITGA5 which subsequently led to increased cellular invasion. Moreover Nm23 overexpression was effective in suppressing the effects of alcohol on cell invasion. In addition we show that the effects of alcohol on invasion were also inhibited by knock-down of ITGA5. .

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