项目名称: miR-145在TR4调控前列腺癌CD133阳性细胞化疗耐药中的作用机制
项目编号: No.81472776
项目类型: 面上项目
立项/批准年度: 2015
项目学科: 医药、卫生
项目作者: 阳东荣
作者单位: 苏州大学
项目金额: 72万元
中文摘要: 去势抵抗性前列腺癌的化疗耐药是临床面临的难题之一。目前认为肿瘤组织中存在的CD133阳性细胞及miRNA表达异常是肿瘤化疗耐药的重要因素。我们的前期研究发现,在前列腺癌C4-2 细胞株的CD133阳性细胞中,睾丸孤核受体4(TR4) 通过调控Oct4的表达调节细胞的化疗耐药性。同时TR4还可抑制C4-2 CD133细胞中miR-145的表达水平。而miR-145表达降低可使Oct4的表达升高。因此,在CD133阳性前列腺癌细胞中,TR4可能还通过抑制miR-145的表达,间接影响Oct4的表达而发挥化疗耐药功能。为此,需要在此基础上,采用多种分子生物学技术,从细胞水平及动物水平进一步证实这一作用机制。从而进一步明确TR4在前列腺癌CD133阳性细胞中的化疗耐药机制。
中文关键词: C14_前列腺肿瘤;化疗耐药;睾丸孤核受体4;小RNA;CD133
英文摘要: Chemoresistance of castration-resistance prostate cancer is one of the main clinical obstacle.It was proved that the existance of CD133 positive cells and abnormal expression of miRNAs in cancer tissue were the important factors that contribute to cancer chemoresistance.In our preliminary study, we found that testicular nuclear receptor 4(TR4) could modulate chemoresistance through mediate the expression of Oct4 in CD133 positive cells of prostate cancer C4-2 cell line .further more,TR4 can also inhibit the expression of miR-145 in CD133 positive cells.and low expression of miR-145 can stimulate the expression of Oct4.We speculate that,dispite that TR4 can directly modulate the expression of Oct4, it can also inhibite the expression of miR-145 and further modulate the expression of Oct4 in CD133 positive prostate cancer cells,which is the main cause of chemoresistance in prostate cancer.However,this mechanism needs to be further verified in vitro and in vivo.
英文关键词: prostate cancer;chemoresistance;testicular nuclear receptor 4;microRNA;CD133