Objective To observe the effects of Dexamethasone (Dex), a synthetic glucocorticoid, on glucocorticoid receptor expression in the human ovarian carcinoma cell line 3AO. The molecular mechanism of glucocorticoid (GC) o...Objective To observe the effects of Dexamethasone (Dex), a synthetic glucocorticoid, on glucocorticoid receptor expression in the human ovarian carcinoma cell line 3AO. The molecular mechanism of glucocorticoid (GC) on 3AO cells was also studied.Methods The expression and regulation of the glucocorticoid receptor in 3AO cells was studied by utilizing radioligand binding assay and quantitative RT-PCR. Results High affinity and low capacity GR existed in 3AO cells, in addition, GR binding activity was down-regulated by Dex in a time-dependent manner, to a level about 28.34% of control following 24 hours treatment, with a concomitant decrease in GR mRNA. The induction of alkaline phosphatase (AKP) activity by Dex was reversed by RU486, a potent glucocorticoid antagonist.Conclusion In 3AO cells, functional GR which can be down-regulated by Dex at the protein and mRNA level, exists suggesting that the regulating effects of Dex on GR occur at least partially at the GR mRNA level, and that the cellular effects of Dex on 3AO cells might be mediated by GR.展开更多
目的:探讨糖皮质激素受体GRα/GRβ在慢性鼻-鼻窦炎治疗中的作用。方法:本研究共纳入2013年5月至2015年5月在上海交通大学医学院附属瑞金医院耳鼻咽喉科行鼻内镜手术治疗的慢性鼻-鼻窦炎患者150例,根据治疗效果分为有效组和无效组,通过...目的:探讨糖皮质激素受体GRα/GRβ在慢性鼻-鼻窦炎治疗中的作用。方法:本研究共纳入2013年5月至2015年5月在上海交通大学医学院附属瑞金医院耳鼻咽喉科行鼻内镜手术治疗的慢性鼻-鼻窦炎患者150例,根据治疗效果分为有效组和无效组,通过免疫组织化学方法检测糖皮质激素受体GRα和GRβ在慢性鼻-鼻窦炎鼻息肉组织中的表达情况,同时选取无鼻-鼻窦炎及变应性疾病史患者中鼻甲黏膜作为阴性对照。分析GRα和GRβ表达水平与Lund and Kennedy内镜评分和生活质量评价的相关性。结果:在有效组、无效组和对照组的鼻黏膜(鼻息肉)中均有较高程度的GRα阳性细胞的表达,各组间的GRα积分无统计学意义;另外,有效组和无效组的GRβ积分均明显高于对照组,有效组GRβ积分明显低于无效组,两两比较,其差异均具有统计学意义(P<0.01)。相关性分析显示,将150例患者GRα的表达与Lund and Kennedy内镜评分无明显相关性,而GRβ的表达与Lund and Kennedy内镜评分呈现正相关。另外,GRα的表达与术后VAS评分、SNOT-20评分及SF-36评分之间无明显的相关性,而GRβ的表达与术后VAS评分和SNOT-20评分均呈正相关,而与术后SF-36评分无明显相关性。结论:GRβ的高表达可能是导致慢性鼻-鼻窦炎患者临床疗效不佳的重要因素。展开更多
文摘Objective To observe the effects of Dexamethasone (Dex), a synthetic glucocorticoid, on glucocorticoid receptor expression in the human ovarian carcinoma cell line 3AO. The molecular mechanism of glucocorticoid (GC) on 3AO cells was also studied.Methods The expression and regulation of the glucocorticoid receptor in 3AO cells was studied by utilizing radioligand binding assay and quantitative RT-PCR. Results High affinity and low capacity GR existed in 3AO cells, in addition, GR binding activity was down-regulated by Dex in a time-dependent manner, to a level about 28.34% of control following 24 hours treatment, with a concomitant decrease in GR mRNA. The induction of alkaline phosphatase (AKP) activity by Dex was reversed by RU486, a potent glucocorticoid antagonist.Conclusion In 3AO cells, functional GR which can be down-regulated by Dex at the protein and mRNA level, exists suggesting that the regulating effects of Dex on GR occur at least partially at the GR mRNA level, and that the cellular effects of Dex on 3AO cells might be mediated by GR.
文摘目的:探讨糖皮质激素受体GRα/GRβ在慢性鼻-鼻窦炎治疗中的作用。方法:本研究共纳入2013年5月至2015年5月在上海交通大学医学院附属瑞金医院耳鼻咽喉科行鼻内镜手术治疗的慢性鼻-鼻窦炎患者150例,根据治疗效果分为有效组和无效组,通过免疫组织化学方法检测糖皮质激素受体GRα和GRβ在慢性鼻-鼻窦炎鼻息肉组织中的表达情况,同时选取无鼻-鼻窦炎及变应性疾病史患者中鼻甲黏膜作为阴性对照。分析GRα和GRβ表达水平与Lund and Kennedy内镜评分和生活质量评价的相关性。结果:在有效组、无效组和对照组的鼻黏膜(鼻息肉)中均有较高程度的GRα阳性细胞的表达,各组间的GRα积分无统计学意义;另外,有效组和无效组的GRβ积分均明显高于对照组,有效组GRβ积分明显低于无效组,两两比较,其差异均具有统计学意义(P<0.01)。相关性分析显示,将150例患者GRα的表达与Lund and Kennedy内镜评分无明显相关性,而GRβ的表达与Lund and Kennedy内镜评分呈现正相关。另外,GRα的表达与术后VAS评分、SNOT-20评分及SF-36评分之间无明显的相关性,而GRβ的表达与术后VAS评分和SNOT-20评分均呈正相关,而与术后SF-36评分无明显相关性。结论:GRβ的高表达可能是导致慢性鼻-鼻窦炎患者临床疗效不佳的重要因素。
