目的初步探究微小RNA-203(miR-203)调控锌指蛋白281(ZNF281)对黑素瘤细胞增殖、迁移的影响。方法常规培养人血管内皮细胞系ECV304、人黑素瘤细胞系A375、M14、SK-MEL-28、SK-MEL-2,实时荧光定量PCR检测各细胞系中miR-203表达情况,Wester...目的初步探究微小RNA-203(miR-203)调控锌指蛋白281(ZNF281)对黑素瘤细胞增殖、迁移的影响。方法常规培养人血管内皮细胞系ECV304、人黑素瘤细胞系A375、M14、SK-MEL-28、SK-MEL-2,实时荧光定量PCR检测各细胞系中miR-203表达情况,Western免疫印迹法检测各细胞系中ZNF281蛋白水平。A375、M14细胞分别分为5组:对照组(细胞正常培养)、miR-203模拟物对照组(加入miR-203模拟物阴性对照)、miR-203抑制剂对照组(加入miR-203抑制剂阴性对照)、miR-203模拟物组(加入miR-203模拟物)、miR-203抑制剂组(加入miR-203抑制剂)。实时荧光定量PCR检测各组A375、M14细胞中miR-203的表达,CCK8法检测各组A375、M14细胞增殖活性,Transwell实验检测各组A375、M14细胞迁移数量,Western免疫印迹法检测各组A375、M14细胞中ZNF281蛋白的表达。双荧光素酶验证miR-203与ZNF281的靶向关系。多组比较采用单因素方差分析,两两比较采用SNK-q法。结果与血管内皮细胞系ECV304相比,黑素瘤细胞系A375、M14、SK-MEL-28、SK-MEL-2中miR-203表达水平较低(均P<0.05),ZNF281蛋白水平较高(均P<0.05)。与对照组、miR-203模拟物对照组、miR-203抑制剂对照组相比,miR-203模拟物组A375、M14细胞中miR-203水平均显著升高(F=487.632、68.454,均P<0.05),细胞迁移数量均显著降低(均P<0.05),ZNF281蛋白表达均显著降低(均P<0.05);miR-203抑制剂组A375、M14细胞中miR-203表达均显著降低(均P<0.05),细胞迁移数量均显著增加(均P<0.05),A375细胞中ZNF281蛋白表达显著升高(均P<0.05),36、48、60、72 h A375细胞增殖活性显著升高(均P<0.05),24、36、48、60、72 h M14细胞增殖活性均显著升高(均P<0.05)。miR-203与ZNF281之间存在靶位点。结论上调miR-203表达可抑制黑素瘤细胞增殖、迁移,下调miR-203表达可促进黑素瘤细胞增殖、迁移,可能通过调控ZNF281的表达实现。展开更多
Objective: To investigate the effects of histamine on growth and apoptosis of human melanoma cells A375. Methods: The effect of histamine on growth of A375 cells in vitro was examined by MTT assay and Trypan blue excl...Objective: To investigate the effects of histamine on growth and apoptosis of human melanoma cells A375. Methods: The effect of histamine on growth of A375 cells in vitro was examined by MTT assay and Trypan blue exclusion assay. Cell cycle analysis, early apoptosis analysis by double staining with Annexin V-FITC and PI, and active caspase-3 analysis by staining FITC-conjugated monoclonal rabbit anti-active caspase-3 antibody were made by flow cytometer. StreptAvidin-Biotin Complex (SABC) immunocytochemical assays were adopted to detect Bax/Bcl-2 protein expressions.Results: Histamine inhibited proliferation of A375 cells in a dose- and time-dependent manner, and altered cell cycle distribution of A375 cells revealing an increase in G0/G1-phase population, a decrease in S-phase population and the inhibition of G1/S switching. Histamine induced apoptosis of A375 cells (P<0.05), elevated the cells population with detectable active caspase-3 (P<0.05), increased the number of cells forming Bax and decreased the number of cells forming Bcl-2 significantly (P<0.05). Conclusion: That histamine inhibits cell cycle progress of A375 cells is one of the possible mechanisms of proliferation arrest of A375 cells elicited by histamine. Histamine mediates apoptosis in A375 cells that may be caspase-dependent through mitochondria routine. Histamine with high concentration inhibits growth of A375 cells in vitro by interfering proliferation and inducing apoptosis of cells.展开更多
文摘目的初步探究微小RNA-203(miR-203)调控锌指蛋白281(ZNF281)对黑素瘤细胞增殖、迁移的影响。方法常规培养人血管内皮细胞系ECV304、人黑素瘤细胞系A375、M14、SK-MEL-28、SK-MEL-2,实时荧光定量PCR检测各细胞系中miR-203表达情况,Western免疫印迹法检测各细胞系中ZNF281蛋白水平。A375、M14细胞分别分为5组:对照组(细胞正常培养)、miR-203模拟物对照组(加入miR-203模拟物阴性对照)、miR-203抑制剂对照组(加入miR-203抑制剂阴性对照)、miR-203模拟物组(加入miR-203模拟物)、miR-203抑制剂组(加入miR-203抑制剂)。实时荧光定量PCR检测各组A375、M14细胞中miR-203的表达,CCK8法检测各组A375、M14细胞增殖活性,Transwell实验检测各组A375、M14细胞迁移数量,Western免疫印迹法检测各组A375、M14细胞中ZNF281蛋白的表达。双荧光素酶验证miR-203与ZNF281的靶向关系。多组比较采用单因素方差分析,两两比较采用SNK-q法。结果与血管内皮细胞系ECV304相比,黑素瘤细胞系A375、M14、SK-MEL-28、SK-MEL-2中miR-203表达水平较低(均P<0.05),ZNF281蛋白水平较高(均P<0.05)。与对照组、miR-203模拟物对照组、miR-203抑制剂对照组相比,miR-203模拟物组A375、M14细胞中miR-203水平均显著升高(F=487.632、68.454,均P<0.05),细胞迁移数量均显著降低(均P<0.05),ZNF281蛋白表达均显著降低(均P<0.05);miR-203抑制剂组A375、M14细胞中miR-203表达均显著降低(均P<0.05),细胞迁移数量均显著增加(均P<0.05),A375细胞中ZNF281蛋白表达显著升高(均P<0.05),36、48、60、72 h A375细胞增殖活性显著升高(均P<0.05),24、36、48、60、72 h M14细胞增殖活性均显著升高(均P<0.05)。miR-203与ZNF281之间存在靶位点。结论上调miR-203表达可抑制黑素瘤细胞增殖、迁移,下调miR-203表达可促进黑素瘤细胞增殖、迁移,可能通过调控ZNF281的表达实现。
文摘Objective: To investigate the effects of histamine on growth and apoptosis of human melanoma cells A375. Methods: The effect of histamine on growth of A375 cells in vitro was examined by MTT assay and Trypan blue exclusion assay. Cell cycle analysis, early apoptosis analysis by double staining with Annexin V-FITC and PI, and active caspase-3 analysis by staining FITC-conjugated monoclonal rabbit anti-active caspase-3 antibody were made by flow cytometer. StreptAvidin-Biotin Complex (SABC) immunocytochemical assays were adopted to detect Bax/Bcl-2 protein expressions.Results: Histamine inhibited proliferation of A375 cells in a dose- and time-dependent manner, and altered cell cycle distribution of A375 cells revealing an increase in G0/G1-phase population, a decrease in S-phase population and the inhibition of G1/S switching. Histamine induced apoptosis of A375 cells (P<0.05), elevated the cells population with detectable active caspase-3 (P<0.05), increased the number of cells forming Bax and decreased the number of cells forming Bcl-2 significantly (P<0.05). Conclusion: That histamine inhibits cell cycle progress of A375 cells is one of the possible mechanisms of proliferation arrest of A375 cells elicited by histamine. Histamine mediates apoptosis in A375 cells that may be caspase-dependent through mitochondria routine. Histamine with high concentration inhibits growth of A375 cells in vitro by interfering proliferation and inducing apoptosis of cells.
