Estrogen-related receptor alpha （ERRα） plays an important role in the development of hor- monezdependent cancers, but its roles in lung cancer remain elusive. The present study was aimed to investigate the effects ...Estrogen-related receptor alpha （ERRα） plays an important role in the development of hor- monezdependent cancers, but its roles in lung cancer remain elusive. The present study was aimed to investigate the effects of ERRα on the proliferation and metastasis of lung cancer A549 cells. The mRNA and protein levels of ERRor were detected in lung cancer A549 and MCF-7 cells and bronchial epithelial BEAS-2B cells by qRT-PCR and Western blotting, respectively. ERRor plasmid transfection and XCT-790 （an inverse agonist of ERRc0 were used to up-regulate or down-regulate ERRα expression in A549 cells, respectively. The viability of A549 cells was measured by cell counting kit-8 （CCK-8） and the motility of A549 cells by wound healing assay and Transwell migration/invasion assay. The epithelial markers E-cadherin （E-Cad） and zona occludin-1 （ZO-1）, the mesenchymal markers fi- bronectin （FN） and vimentin （Vim） and the transcription factors （Snail, Zebl Twist and Slug） were fur- ther detected at mRNA and protein levels by qRT-PCR and Western blotting, respectively. The results showed that ERRor promoted the growth of lung cancer A549 cells in vitro. XCT-790 significantly in- hibited the migration and invasion of A549 cells. Over-expression of ERRα promoted the epithe- lial-to-mesenchymal transition （EMT） of A549 ceils, down-regulated the epithelial makers E-Cad and ZO-1, and up-regulated the mesenchymal makers FN and Vim. Silencing of Slug, but not other tran- scription factors, significantly abolished the ERRs-induced EMT of A549 cells. It was suggested that ERRor promoted the migration and invasion of A549 cells by inducing EMT, and Slug was involved in the process. Targeting ERRor might be an efficient approach for lung cancer treatment.展开更多
目的探讨雌激素相关受体α(estrogen-related receptor alpha,ERRα)对脂多糖(lipopolysaccharide,LPS)诱导大鼠肺微血管内皮细胞(pulmonary microvascular endothelial cells,PMVECs)炎症反应的影响及其机制。方法体外培养PMVECs细胞株...目的探讨雌激素相关受体α(estrogen-related receptor alpha,ERRα)对脂多糖(lipopolysaccharide,LPS)诱导大鼠肺微血管内皮细胞(pulmonary microvascular endothelial cells,PMVECs)炎症反应的影响及其机制。方法体外培养PMVECs细胞株,当细胞处于对数生长期时利用慢病毒转染细胞,并构建稳定低表达的ERRα细胞株。将细胞分别为四组:正常对照组(Ctr组)、正常细胞+LPS处理组(Ctr+LPS组)、shERRα1基因敲低组(shERRα1组)和shERRα1基因敲低组+LPS处理组(shERRα1+LPS组)。予20μg/mL的LPS分别刺激对照组和基因敲低组细胞6、12和24 h后,应用cell counting kit-8(cck-8)检测各组细胞的增殖能力;应用酶联免疫吸附试验(ELISA)检测细胞培养液中的肿瘤坏死因子α(TNF-α)、白介素1β(IL-1β)的浓度,于LPS刺激12 h后采用Western blot检测各组细胞ERRα及NF-κB通路的相关蛋白(p-p65、p65、P-IKBα、IKBα)的表达水平。两组变量比较采用SNK-q检验,多组变量比较采用单因素方差分析,方差不齐时则用秩转换的非参数检验。以P<0.05为差异有统计学意义。结果与对照组相比,shERRα1组ERRα蛋白的表达量明显降低(0.09±0.01 vs 0.15±0.01);于LPS刺激6、12和24 h后,与对照组相比,shERRα1+LPS组细胞增殖能力明显降低[(99.68±4.53)%vs(48.62±1.60)%];细胞培养上清液中的TNF-α(ng/mL)、IL-1β(ng/mL)的浓度明显升高,于刺激12 h后变化最为明显(15.76±3.38 vs 5498.91±367.95;14.41±3.86 vs 6014.92±277.33)。同时,shERRα1+LPS组p-p65(0.30±0.5 vs 1.05±0.07)、p-IKBα(0.27±0.04 vs 0.77±0.06)表达量明显升高,而IKBα的表达量明显降低(0.96±0.07 vs 0.14±0.04),差异均具有统计学意义(均P<0.05)。结论ERRα基因通过抑制NF-κB信号通路激活,缓解LPS诱导的大鼠肺微血管内皮细胞炎症反应。展开更多
基金supported by the Fundamental Research Funds of the Central Universities(No.21613316)
文摘Estrogen-related receptor alpha （ERRα） plays an important role in the development of hor- monezdependent cancers, but its roles in lung cancer remain elusive. The present study was aimed to investigate the effects of ERRα on the proliferation and metastasis of lung cancer A549 cells. The mRNA and protein levels of ERRor were detected in lung cancer A549 and MCF-7 cells and bronchial epithelial BEAS-2B cells by qRT-PCR and Western blotting, respectively. ERRor plasmid transfection and XCT-790 （an inverse agonist of ERRc0 were used to up-regulate or down-regulate ERRα expression in A549 cells, respectively. The viability of A549 cells was measured by cell counting kit-8 （CCK-8） and the motility of A549 cells by wound healing assay and Transwell migration/invasion assay. The epithelial markers E-cadherin （E-Cad） and zona occludin-1 （ZO-1）, the mesenchymal markers fi- bronectin （FN） and vimentin （Vim） and the transcription factors （Snail, Zebl Twist and Slug） were fur- ther detected at mRNA and protein levels by qRT-PCR and Western blotting, respectively. The results showed that ERRor promoted the growth of lung cancer A549 cells in vitro. XCT-790 significantly in- hibited the migration and invasion of A549 cells. Over-expression of ERRα promoted the epithe- lial-to-mesenchymal transition （EMT） of A549 ceils, down-regulated the epithelial makers E-Cad and ZO-1, and up-regulated the mesenchymal makers FN and Vim. Silencing of Slug, but not other tran- scription factors, significantly abolished the ERRs-induced EMT of A549 cells. It was suggested that ERRor promoted the migration and invasion of A549 cells by inducing EMT, and Slug was involved in the process. Targeting ERRor might be an efficient approach for lung cancer treatment.
文摘目的探讨雌激素相关受体α(estrogen-related receptor alpha,ERRα)对脂多糖(lipopolysaccharide,LPS)诱导大鼠肺微血管内皮细胞(pulmonary microvascular endothelial cells,PMVECs)炎症反应的影响及其机制。方法体外培养PMVECs细胞株,当细胞处于对数生长期时利用慢病毒转染细胞,并构建稳定低表达的ERRα细胞株。将细胞分别为四组:正常对照组(Ctr组)、正常细胞+LPS处理组(Ctr+LPS组)、shERRα1基因敲低组(shERRα1组)和shERRα1基因敲低组+LPS处理组(shERRα1+LPS组)。予20μg/mL的LPS分别刺激对照组和基因敲低组细胞6、12和24 h后,应用cell counting kit-8(cck-8)检测各组细胞的增殖能力;应用酶联免疫吸附试验(ELISA)检测细胞培养液中的肿瘤坏死因子α(TNF-α)、白介素1β(IL-1β)的浓度,于LPS刺激12 h后采用Western blot检测各组细胞ERRα及NF-κB通路的相关蛋白(p-p65、p65、P-IKBα、IKBα)的表达水平。两组变量比较采用SNK-q检验,多组变量比较采用单因素方差分析,方差不齐时则用秩转换的非参数检验。以P<0.05为差异有统计学意义。结果与对照组相比,shERRα1组ERRα蛋白的表达量明显降低(0.09±0.01 vs 0.15±0.01);于LPS刺激6、12和24 h后,与对照组相比,shERRα1+LPS组细胞增殖能力明显降低[(99.68±4.53)%vs(48.62±1.60)%];细胞培养上清液中的TNF-α(ng/mL)、IL-1β(ng/mL)的浓度明显升高,于刺激12 h后变化最为明显(15.76±3.38 vs 5498.91±367.95;14.41±3.86 vs 6014.92±277.33)。同时,shERRα1+LPS组p-p65(0.30±0.5 vs 1.05±0.07)、p-IKBα(0.27±0.04 vs 0.77±0.06)表达量明显升高,而IKBα的表达量明显降低(0.96±0.07 vs 0.14±0.04),差异均具有统计学意义(均P<0.05)。结论ERRα基因通过抑制NF-κB信号通路激活,缓解LPS诱导的大鼠肺微血管内皮细胞炎症反应。
