目的探讨在炎性激活条件下的椎间盘退变(IDD)过程中miR-335-3p靶向调控趋化因子配体(CCL)5的机制及可能抑制IDD进展的方法。方法建立人髓核(NP)细胞的原代培养,肿瘤坏死因子(TNF)-α诱导NP细胞,Trizol法获取NP细胞总RNA,随后对mRNA及mi...目的探讨在炎性激活条件下的椎间盘退变(IDD)过程中miR-335-3p靶向调控趋化因子配体(CCL)5的机制及可能抑制IDD进展的方法。方法建立人髓核(NP)细胞的原代培养,肿瘤坏死因子(TNF)-α诱导NP细胞,Trizol法获取NP细胞总RNA,随后对mRNA及miRNA进行高通量测序分析。对miR-335-3p靶向结合mRNA进行预测,结合STRING富集分析miRNA靶标基因,确定TNF-α影响NP细胞的关键基因。应用The Human Protein Atlas(https://www.proteinatlas.org/)分析CCL5及其下游调控蛋白受体趋化因子受体(CCR)5基因在免疫相关细胞中的表达水平。应用Targetscan预测miR-335-3p与CCL53′UTR序列的靶向结合位点。结合promega的双荧光素酶报告系统使用turner仪器进行测量。将人NP细胞分成:Control组(NP细胞)、TNF-α组、mimic-NC组、miR-335-3p mimic组。使用Lipofectamine RNAiMAX将miR-335-3p mimic或miR-NC寡核苷酸序列转染入人NP细胞。采用实时荧光定量聚合酶链反应(qRT-PCR)方法检测miR-335-3p的表达情况。Western印迹实验检测NP细胞外基质相关蛋白的表达水平。结果与Control组比较,TNF-α组miR-335-3p基因表达水平显著下调(P<0.01),CCL5基因表达水平显著上调(P<0.01);miR-335-3p mimic组miR-335-3p表达水平较mimic-NC组显著上调(P<0.01),CCL5表达水平显著较mimic-NC组下调(P<0.01)。与Control组比较,TNF-α组生长分化因子(GDF)5和性别决定区Y框蛋白(SOX)9蛋白显著下调,而基质金属蛋白酶(MMP)2蛋白表达水平显著上调(P<0.01);与mimic-NC组比较,miR-335-3p mimic组MMP2蛋白表达水平显著下调,而GDF5和SOX9蛋白显著上调(P<0.01)。结论miR-335-3p在TNF-α诱导的炎症条件下可特异性下调CCL5,从而逆转TNF-α诱导的软骨生成因子SOX9的异常表达。展开更多
目的探讨CCL18-PITPNM3(CC chemokine ligand 18-phosphatidylinositol transfer protein 3,CCL18-PITPNM3)配体受体轴在头颈鳞状细胞癌侵袭转移中的作用及其分子机制。方法采用人重组蛋白CCL18处理头颈鳞状细胞癌Tu686、6-10B细胞,siRN...目的探讨CCL18-PITPNM3(CC chemokine ligand 18-phosphatidylinositol transfer protein 3,CCL18-PITPNM3)配体受体轴在头颈鳞状细胞癌侵袭转移中的作用及其分子机制。方法采用人重组蛋白CCL18处理头颈鳞状细胞癌Tu686、6-10B细胞,siRNA下调PITPNM3的表达,通过CCK-8(cell counting kit-8)、平板克隆实验、流式周期检测生长增殖能力的变化,划痕愈合实验、Transwell侵袭小室实验检测体外迁移侵袭能力的改变,qRT-PCR、Western blot检测EMT分子标志物的表达情况。结果①rhCCL18处理头颈鳞状细胞癌Tu686、6-10B细胞后,细胞划痕愈合率增加,穿过Transwell聚碳酸酯膜的细胞明显增多,rhCCL18处理siRNA下调PITPNM3的Tu686、6-10B细胞,下调组细胞的迁移和侵袭能力较亲本细胞处理组明显减弱;②rhCCL18处理头颈鳞状细胞癌Tu686、6-10B细胞,mRNA水平E-cadherin表达降低,Vimentin、N-cadherin、Fibronectin表达升高;蛋白质水平E-cadherin表达降低,Vimentin表达升高。下调两株细胞的PITPNM3表达后rhCCL18再次处理,E-cadherin下调和Vimentin、N-cadherin、Fibronectin上调均未显示出亲本细胞的明显趋势;③rhCCL18处理和下调PITPNM3对Tu686、6-10B 6组细胞的生存率、增殖及细胞周期无明显变化。结论CCL18-PITPNM3配体受体轴可促进头颈鳞状细胞癌的体外侵袭转移能力,可能与EMT转化相关。展开更多
Objective To investigate the changes of aquaporin (AQP-1) expressions on peritonea in liver cirrhotic rats with ascites,and to study the correlation between AQP-1 expressions and ascites form.Methods32 healthy Sprag...Objective To investigate the changes of aquaporin (AQP-1) expressions on peritonea in liver cirrhotic rats with ascites,and to study the correlation between AQP-1 expressions and ascites form.Methods32 healthy Sprague-Dawley(SD) rats were divided into two groups randomly, 20 rats were used to produce liver cirrhotic models induced with phenobarbitol sodium and CCl4. The distribution and protein expressions of AQP-1 on the rats′ peritonea were measured with immunohistochemistry assay, and the expressions of APQ-1 mRNA were tested with relative GAPDH quantitative RT-PCR. Results (1)The expressions of AQP-1 were mainly on the endothelial cells of capillary vessels and venules on the rats′ peritonea, and also on mesothelial cells. (2)There was no statistically significant difference between the expressions of AQP-1 protein and mRNA in the two groups on the early stage of liver cirrhosis. (3) Downregulations of the expressions of AQP-1 protein and mRNA were observed in B group on the advanced cirrhotic stage.Conclusion Expressions of AQP-1 were downregulated on the peritonea of rats with decompensated liver cirrhosis, which may play a role in the formation of ascites. The changes of AQP-1 Expressions on peritoneal mesothelial cells which were fewer than those on the endothelial cells may be few relations to ascites form.展开更多
文摘目的探讨在炎性激活条件下的椎间盘退变(IDD)过程中miR-335-3p靶向调控趋化因子配体(CCL)5的机制及可能抑制IDD进展的方法。方法建立人髓核(NP)细胞的原代培养,肿瘤坏死因子(TNF)-α诱导NP细胞,Trizol法获取NP细胞总RNA,随后对mRNA及miRNA进行高通量测序分析。对miR-335-3p靶向结合mRNA进行预测,结合STRING富集分析miRNA靶标基因,确定TNF-α影响NP细胞的关键基因。应用The Human Protein Atlas(https://www.proteinatlas.org/)分析CCL5及其下游调控蛋白受体趋化因子受体(CCR)5基因在免疫相关细胞中的表达水平。应用Targetscan预测miR-335-3p与CCL53′UTR序列的靶向结合位点。结合promega的双荧光素酶报告系统使用turner仪器进行测量。将人NP细胞分成:Control组(NP细胞)、TNF-α组、mimic-NC组、miR-335-3p mimic组。使用Lipofectamine RNAiMAX将miR-335-3p mimic或miR-NC寡核苷酸序列转染入人NP细胞。采用实时荧光定量聚合酶链反应(qRT-PCR)方法检测miR-335-3p的表达情况。Western印迹实验检测NP细胞外基质相关蛋白的表达水平。结果与Control组比较,TNF-α组miR-335-3p基因表达水平显著下调(P<0.01),CCL5基因表达水平显著上调(P<0.01);miR-335-3p mimic组miR-335-3p表达水平较mimic-NC组显著上调(P<0.01),CCL5表达水平显著较mimic-NC组下调(P<0.01)。与Control组比较,TNF-α组生长分化因子(GDF)5和性别决定区Y框蛋白(SOX)9蛋白显著下调,而基质金属蛋白酶(MMP)2蛋白表达水平显著上调(P<0.01);与mimic-NC组比较,miR-335-3p mimic组MMP2蛋白表达水平显著下调,而GDF5和SOX9蛋白显著上调(P<0.01)。结论miR-335-3p在TNF-α诱导的炎症条件下可特异性下调CCL5,从而逆转TNF-α诱导的软骨生成因子SOX9的异常表达。
文摘Objective To investigate the changes of aquaporin (AQP-1) expressions on peritonea in liver cirrhotic rats with ascites,and to study the correlation between AQP-1 expressions and ascites form.Methods32 healthy Sprague-Dawley(SD) rats were divided into two groups randomly, 20 rats were used to produce liver cirrhotic models induced with phenobarbitol sodium and CCl4. The distribution and protein expressions of AQP-1 on the rats′ peritonea were measured with immunohistochemistry assay, and the expressions of APQ-1 mRNA were tested with relative GAPDH quantitative RT-PCR. Results (1)The expressions of AQP-1 were mainly on the endothelial cells of capillary vessels and venules on the rats′ peritonea, and also on mesothelial cells. (2)There was no statistically significant difference between the expressions of AQP-1 protein and mRNA in the two groups on the early stage of liver cirrhosis. (3) Downregulations of the expressions of AQP-1 protein and mRNA were observed in B group on the advanced cirrhotic stage.Conclusion Expressions of AQP-1 were downregulated on the peritonea of rats with decompensated liver cirrhosis, which may play a role in the formation of ascites. The changes of AQP-1 Expressions on peritoneal mesothelial cells which were fewer than those on the endothelial cells may be few relations to ascites form.