摘要目的 探讨趋化素样因子超家族成员5(CMTM5)对前列腺癌细胞的作用及机制.方法 利用划痕实验观察CMTM5对前列腺癌、DU145细胞迁移的影响；蛋白质印迹法检测PI3 K-AKT信号通路相关蛋白的表达；建立18只裸鼠皮下前列腺癌移植瘤模型,实验组肿瘤局部注射CMTM5腺病毒,检测CMTM5过表达对裸鼠前列腺肿瘤生长的影响,应用免疫组织化学方法检测裸鼠肿瘤组织中Ki-67的表达. 结果 过表达CMTM5抑制前列腺癌DU145细胞迁移,减少了PI3K-AKT信号通路中的关键分子pAKT 、NF-kB等蛋白的表达.裸鼠体内实验结果显示,CMTM5组肿瘤体积及质量分别为(573.39±175.24)mm3及(0.55±0.11)g,对照组分别为(1482.50±327.86) mm3及(1.31±0.29)g,2组比较差异均有统计学意义(P＜0.05).CMTM5组肿瘤组织Ki-67表达明显低于对照组. 结论 过表达CMTM5抑制前列腺肿瘤的增殖及迁移能力,其机制与PI3K-AKT信号通路有关.

abstractsObjective To study the effect and mechanism of CKLF-like Marvel transmembrane domain containing 5 (CMTMS) on prostate cancer cell proliferation,migration and invasion.Methods The inhibitory effects of CMTM5 on the migration of DU145 cells were studied in vitro by wound healing assay.The expression of the cell signal pathway PI3K-AKT protein was detected by Western blot.The inhibition of tumor growth was also studied in transplanted prostate cancer nude mice model treated with CMTM5 adenovirus.The expression of CMTM5 and ki-67 in transplanted prostate cancer tissue of the nude mice model was analyzed immunohisochemistically.Prostate tumor volume in the nude mice model and the proliferation were measured two weeksafter.injection..Results Wound healing assay showed that over-expression of CMTM5 can inhibit the migration of DU145 cells.The expression of pAKT and NF-kB was significantly decreased after the overexpression of CMTM5.The tumor volume (573.39 ± 175.24) mm3,weight (0.55 ± 0.11) g and proliferation index of prostate in CMTM5 orthotopic injection nude mice model were significantly smaller and decreased than those in the control group (1482.50 ± 327.86) mm3 and (1.31 ± 0.29) g (P ＜ 0.05).Conclusions Both in vitro and in vivo experiments demonstrate that overexpression of CMTM5 could suppress prostate cancer cell proliferation,migration and invasion.The effect may be conducted by PI3K-AKT signaling pathway.