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干扰裸鼠荷人前列腺癌模型中mir-21表达对细胞中PDCD4蛋白表达的影响

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摘要 目的探讨干扰裸鼠荷人前列腺癌模型中mir-21表达对细胞中PDCD4蛋白表达的影响。方法采用腋下皮肤接种22Rv1细胞的方法制作SCID鼠前列腺癌模型,待成瘤后给予三种不同处理方法,观察荷瘤部位肿瘤的生长情况,并取肿瘤组织标本,使用RT-PCR以及western印痕法检测实验组与对照组肿瘤相关指标的差异。结果①给予mir-21 antagomirs治疗后实验组移植瘤肿瘤体积增长变缓;②RT-PCR检测miR-21在移植瘤中的表达,给予anti-miR21antagomirs治疗组的miR-21表达较空白对照组明显降低,有显著性差异(P<0.05)。而anti-miR21 antagomirs治疗组与anti-miR21 antagomirs合并去势治疗组的miR21的表达不具有显著性差异(P>0.05);③Western blot检测各组PDCD4的变化。给予anti-miR21 antagomirs治疗组对照组PDCD4的表达增高(P<0.05),去势治疗组的PDCD4表达于对照组比较未发现显著性差异(p>0.05)。结论 (1)抑制miRNA-21在肿瘤细胞中的表达,可以延缓裸鼠移植瘤的生长;(2)anti miR-21 antagomirs治疗组移植瘤体积增长慢于手术去势治疗组;(3)在前列腺癌22Rv1细胞裸鼠移植瘤中,PDCD4的表达受到了miRNA-21的反向调节。
出处 《中国医学工程》 2012年第5期108-110,共3页 China Medical Engineering
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