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目的:探讨长链非编码RNA（lncRNA）C10orf25对前列腺癌细胞增殖和侵袭能力的影响及miRNA-671-5p（miR-671-5p）在其中可能的作用。方法:利用基因表达综合（GEO）数据库中数据（数据更新时间2023年1月），分析C10orf25在137例前列腺癌组织和癌旁组织中表达水平的差异。选择前列腺癌C4-2B、DU-145、22Rv1、PC-3、LNCaP细胞株和永生化前列腺上皮RWPE-1细胞株，应用实时荧光定量聚合酶链反应（qRT-PCR）检测各细胞株C10orf25的相对表达量。选取C10orf25相对表达量最低的22Rv1细胞，分为对照组（转染阴性质粒）和C10orf25组（转染载有C10orf25序列质粒）；CCK-8法检测两组22Rv1细胞第1、2、3、4、5天增殖能力（以吸光度值表示）；Transwell法检测两组22Rv1细胞的侵袭能力。利用Linc2GO软件预测miR-671-5p与C10orf25具有结合位点，双荧光素酶报告基因实验验证C10orf25与miR-671-5p的靶向关系。qRT-PCR检测两组22Rv1细胞C10orf25和miR-671-5p相对表达量。蛋白质印迹法检测两组22Rv1细胞NF-κB信号通路相关蛋白的表达。结果:GEO数据库中，C10orf25在前列腺癌组织中的相对表达量低于癌旁组织（ P<0.01）。C10orf25在永生化前列腺上皮细胞株RWPE-1和前列腺癌细胞株C4-2B、DU-145、22Rv1、PC-3、LNCaP中的相对表达量分别为1.00±0.05、0.63±0.04、0.42±0.03、0.18±0.04、0.81±0.02、0.50±0.07，差异有统计学意义（ F=43.29， P<0.05）。C10orf25组22Rv1细胞的增殖能力从第2天开始均低于对照组，差异均有统计学意义（均 P<0.05）。对照组和C10orf25组侵袭细胞数分别为（97±11）个和（36±9）个，差异有统计学意义（ t=4.15， P<0.01）。Linc2GO软件预测结果显示，C10orf25与miR-671-5p具有结合位点。双荧光素酶报告基因实验结果显示，miR-671-5p和C10orf25野生型质粒共转染22Rv1细胞的相对荧光活性低于miR-NC和C10orf25野生型质粒共转染细胞，差异有统计学意义（ P<0.01），而miR-671-5p或miR-NC与C10orf25突变型质粒共转染时，22Rv1细胞的相对荧光活性差异无统计学意义（ P>0.05）。对照组和C10orf25组22Rv1细胞miR-671-5p相对表达量分别为7.33±0.99和0.98±0.16，差异有统计学意义（ t=6.32， P<0.01）。蛋白质印迹法检测结果显示，C10orf25组22Rv1细胞中NF-κB信号通路蛋白p50、基质金属蛋白酶9、c-myc、血管内皮生长因子蛋白表达水平均低于对照组。 结论:过表达C10orf25可能通过miR-671-5p-NF-κB轴抑制前列腺癌细胞的增殖和侵袭能力。

Objective:To explore the effect of long non-coding RNA (lncRNA) C10orf25 on the proliferation and invasion ability of prostate cancer cells and the possible role of miRNA-671-5p (miR-671-5p).Methods:Data from the Gene expression omnibus (GEO) database (data updated in January 2023) were used to analyze the differences in the expression levels of C10orf25 in 137 cases of prostate cancer tissues and paracancerous tissues. Prostate cancer C4-2B, DU-145, 22Rv1, PC-3, LNCaP cell lines and immortalized prostate epithelial RWPE-1 cell lines were selected, and then real-time quantitative fluorescence polymerase chain reaction (qRT-PCR) was used to detect the relative expression levels of C10orf25 in cell lines. The 22Rv1 cells with the lowest relative expression level of C10orf25 were selected and divided into the control group (transfected with negative plasmid) and the C10orf25 group (transfected with C10orf25 plasmid); the CCK-8 method was used to detect the proliferation activity of 22Rv1 cells in both groups at day 1, 2, 3, 4, 5 (expressed as absorbance value); the Transwell method was used to detect the invasion ability of 22Rv1 cells. Linc2GO software was used to predict miR-671-5p with binding sites for C10orf25. Dual luciferase reporter gene assay was used to verify the targeting relationship between C10orf25 and miR-671-5p. qRT-PCR was used to detect the relative expression levels of C10orf25 and miR-671-5p. Western blot was used to detect the expression of proteins related to the NF-κB signaling pathway of 22Rv1 cells in the both groups.Results:In the GEO database, the relative expression level of C10orf25 in prostate cancer tissues was lower than that in paracancerous tissues ( P < 0.01). The relative expression levels of C10orf25 in immortalized prostate epithelial cell line RWPE-1 and prostate cancer cell lines C4-2B, DU-145, 22Rv1, PC-3, and LNCaP were 1.00±0.05, 0.63±0.04, 0.42±0.03, 0.18±0.04, 0.81±0.02, 0.50±0.07, and the difference was statistically significant ( F = 43.29, P < 0.05). The proliferation ability of 22Rv1 cells in C10orf25 group was lower than that in the control group from the second day, and the differences were statistically significant (all P < 0.05). The number of invasive cells in the control group and C10orf25 group were (97±11) and (36±9), respectively, and the difference was statistically significant ( t = 4.15, P < 0.01). Linc2GO software prediction results showed that C10orf25 had a binding site for miR-671-5p. The dual luciferase reporter gene assay showed that the relative luciferase activity of miR-671-5p and C10orf25 wild plasmid co-transfecting 22Rv1 cells was lower than that of miR-NC and C10orf25 wild plasmid co-transfecting 22Rv1 cells, and the difference was statistically significant ( P < 0.01); when miR-671-5p or miR-NC was co-transfected with C10orf25 mutant plasmid, the difference in the luciferase activity of 22Rv1 cells was not statistically significant ( P > 0.05). The relative expression levels of miR-671-5p in 22Rv1 cells were 7.33±0.99 and 0.98±0.16, respectively in the control group and C10orf25 group, and the difference was statistically significant ( t = 6.32, P < 0.01). The results of Western blot showed that the expression levels of NF-κB signaling pathway protein p50, matrix metalloproteinase 9, c-myc, and vascular endothelial growth factor protein in 22Rv1 cells in C10orf25 group were lower than those in the control group. Conclusions:The overexpression of C10orf25 may inhibit the proliferation and invasion of prostate cancer cells through the miR-671-5p-NF-κB axis.