目的系统评估pSTAT3表达在胃癌患者预后评估的临床价值。方法在Pubmed、Embase以及Web of science三个数据库检索,纳入8篇相关研究,包括1 314例胃癌患者进行meta分析,评估pSTAT3表达在胃癌患者预后评估的临床价值,同时根据各文献研究所...目的系统评估pSTAT3表达在胃癌患者预后评估的临床价值。方法在Pubmed、Embase以及Web of science三个数据库检索,纳入8篇相关研究,包括1 314例胃癌患者进行meta分析,评估pSTAT3表达在胃癌患者预后评估的临床价值,同时根据各文献研究所在地、出版年份、研究的患者数量以及文献质量评分,进行Meta回归分析以及亚组分析。结果 pSTAT3阳性患者相比pSTAT3阴性患者的死亡风险显著增加,差异有统计学意义(HR=1.87,95%CI:1.28~2.74,随机效应模型)。亚组分析结果表明,中国及日本的研究结果显示pSTAT3阳性与胃癌患者预后不良显著相关[中国(HR=2.61,95%CI:2.01~3.38),日本(HR=2.20,95%CI:1.24~3.93)],差异有统计学意义;而韩国地区的研究结果显示差异无统计学意义(HR=1.06,95%CI:0.54~2.11)。pSTAT3表达与胃癌临床病理特征(包括TMN分期、淋巴结转移、分化程度、Lauren分型以及远处转移)等无显著相关性。结论 Meta分析显示pSTAT3阳性与胃癌患者的不良预后相关。pSTAT3表达有望作为胃癌患者的一个独立预后指标。展开更多
Background: The purpose of the present study is to investigate the expression levels of STAT3, pSTAT3, MMP-7 and VEGF in colorectal adenocarcinoma, and also to determine association with the clinico-pathological param...Background: The purpose of the present study is to investigate the expression levels of STAT3, pSTAT3, MMP-7 and VEGF in colorectal adenocarcinoma, and also to determine association with the clinico-pathological parameters and?co-expression of these genes. Methods: An immunohistochemical method was used to evaluate the expression of MMP-7 and VEGF genes in 93 archival tissues whereas STAT3 and pSTAT3 expression was determined in 75 cases. Results: Overexpression of STAT3 was detected in 26.7% (20/75), pSTAT3 in 13.4% (10/75), MMP-7 in 38.8% (36/93) and VEGF in 59.2% (55/93) of the colorectal carcinomas. STAT3, MMP-7 and VEGF immunopositivity were significantly correlated with poorly-differentiated tumors (P = 0.004;P = 0.03;P = 0.002, respectively) but not with other parameters. However, pSTAT3 immunostaining was not significantly associated with the clinico-pathological characteristics. Significant relationship was noted between overexpression of pSTAT3 and STAT3 (P < 0.001), pSTAT3 and VEGF (P = 0.044), pSTAT3 and MMP-7 (P = 0.003), and STAT3 and VEGF (P = 0.037) but marginal association was detected between STAT3 and MMP-7 (P = 0.057), and MMP-7 and VEGF (P = 0.052). Conclusion:?Our data suggest that expression of these genes?may have an important role in tumor dedifferentiation and?may be useful as indicators of biologic aggressiveness. Co-expression of the biomarkers by cancer cells?may have important implications in colorectal cancer biology and?could be useful biological markers of the malignant phenotype.展开更多
Signal transducer and activator of transcription （STAT） proteins play an important role in cytokine signaling pathways and regulation of immune responses. The balance of the phosphorylated （activated） STAT1 （pST...Signal transducer and activator of transcription （STAT） proteins play an important role in cytokine signaling pathways and regulation of immune responses. The balance of the phosphorylated （activated） STAT1 （pSTAT1） and STAT3 （pSTAT3） has been documented in cancer immunology. In this study, we investigated the dynamic balance of pSTAT1 and pSTAT3 in C57BL/6 mice infected with either a nonlethal （Py17XNL） or lethal （Py17XL） strain of Plasmodium yoelii. Both Py17XNL and Py17XL infections induced a maximum activation of STAT1 and STAT3 on the first day after parasite inoculation. Additionally, the Py17XNL infection induced a pSTAT1- dominant response in mice during the early stage of infection, with the resolution of parasitemia. In contrast, Py17XL infection induced a pSTAT3-dominant response during the early phase of infection, with the death of the animals. Our results indicated that maximum activation of STAT1 and STAT3 occurred much earlier than the peak levels of cytokines induced by Plasmodium yoelii infection based on previous reports and that infection with Py17XNL and Py17XL induced different dynamic patterns of pSTAT1 and pSTAT3 balance.展开更多
目的:建立脾虚银屑病样小鼠模型,观察健脾养血解毒方对其银屑病样皮损的干预作用,并探讨其作用机制。方法:首先采用苦寒泻下结合营养限制法建立脾虚小鼠模型,持续15 d后检测验证,将脾虚小鼠随机分为单纯脾虚组(脾虚-Ctr)、脾虚银屑病样...目的:建立脾虚银屑病样小鼠模型,观察健脾养血解毒方对其银屑病样皮损的干预作用,并探讨其作用机制。方法:首先采用苦寒泻下结合营养限制法建立脾虚小鼠模型,持续15 d后检测验证,将脾虚小鼠随机分为单纯脾虚组(脾虚-Ctr)、脾虚银屑病样组(脾虚-IMQ)、阳性对照组(脾虚-MTX)和健脾养血解毒方高、中、低剂量组(JPYXJD-H,M,L),采用咪喹莫特诱导-银屑病样模型。观察各组小鼠皮损面积和疾病严重程度(psoriasis area and severity index,PASI),每日拍照记录;治疗后第6天取材,计算脾脏及淋巴结指数;光镜下观察皮损组织形态学变化及表皮层厚度;免疫组织化学法检测皮损中PCNA和CD3的表达;流式细胞术检测小鼠淋巴结中Treg和Th17细胞数量;RT-PCR技术检测皮损中IL-17A、IL-23、FOXP3、ROR-γt等相关基因表达水平;采用Western Blotting法检测pSTAT3、PPAR-γ通路蛋白表达水平。结果:(1)与对照组小鼠相比,脾虚组表观指征异常明显,血清中D-木糖含量明显降低(P<0.05)。(2)与脾虚-Ctr组相比,脾虚-IMQ组小鼠皮损PASI评分及表皮厚度明显增加,皮损部位PCNA、CD3阳性个数显著增多,IL-17、IL-23、ROR-γt和IFN-γ等炎症因子的表达明显升高,pSTAT蛋白表达升高而PPAR-γ蛋白表达降低的趋势明显。JPYXJD-H、M、L组与其相比各项指标均有不同程度改善,其中以JPYXJD-L组最为显著。结论:健脾养血解毒方在传统理血解毒的基础上强调健脾治法,并依此增加健脾药的使用,从而发挥对脾虚证-银屑病复合模型小鼠皮损的干预作用,通过PPAR-γ/pSTAT3通路调节Treg/Th17之间的免疫平衡可能是其有效作用机制之一。展开更多
目的观察鼻息肉患者磷酸化信号转导与转录激活因子3(phospho-signal transducers and activators of transcription,p-STAT3)、SOCS3(suppressor of cytokine signaling,SOCS3)及Th17相关因子的水平,初步探讨STAT3及SOCS3对鼻息肉患者T...目的观察鼻息肉患者磷酸化信号转导与转录激活因子3(phospho-signal transducers and activators of transcription,p-STAT3)、SOCS3(suppressor of cytokine signaling,SOCS3)及Th17相关因子的水平,初步探讨STAT3及SOCS3对鼻息肉患者Th17细胞功能的作用。方法选取40例鼻息肉患者标本及15例对照组标本,采用免疫组化和蛋白免疫印迹法检测p-STAT3及SOCS3在鼻息肉组织中的分布及表达,运用ELISA法检测IL-6和IL-17A的表达情况,采用RT-PCR检测RORγt的表达水平,并对数据进行统计学分析。结果鼻息肉组的p-STAT3、IL-6、IL-17A以及RORγt表达明显高于对照组(P<0.01),SOCS3在鼻息肉组中的表达则低于对照组(P<0.01)。相关性分析显示p-STAT3、RORγt及IL-17A与SOCS3呈负相关(p-STAT3/SOCS3:r=-0.545,P<0.01;RORγt/SOCS3:r=-0.627,P<0.05;IL-17A/SOCS3:r=-0.631,P<0.01),而p-STAT3与RORγt、IL-6、IL-17A呈正相关(p-STAT3/RORγt:r=0.594,P<0.001;p-STAT3/IL-6:r=0.632,P<0.001;p-STAT3/IL-17A:r=0.647,P<0.01)。结论 STAT3异常活化,以及SOCS3低表达所致抑制作用缺失可能是造成鼻息肉中Th17细胞过度活化的重要原因。展开更多
文摘Background: The purpose of the present study is to investigate the expression levels of STAT3, pSTAT3, MMP-7 and VEGF in colorectal adenocarcinoma, and also to determine association with the clinico-pathological parameters and?co-expression of these genes. Methods: An immunohistochemical method was used to evaluate the expression of MMP-7 and VEGF genes in 93 archival tissues whereas STAT3 and pSTAT3 expression was determined in 75 cases. Results: Overexpression of STAT3 was detected in 26.7% (20/75), pSTAT3 in 13.4% (10/75), MMP-7 in 38.8% (36/93) and VEGF in 59.2% (55/93) of the colorectal carcinomas. STAT3, MMP-7 and VEGF immunopositivity were significantly correlated with poorly-differentiated tumors (P = 0.004;P = 0.03;P = 0.002, respectively) but not with other parameters. However, pSTAT3 immunostaining was not significantly associated with the clinico-pathological characteristics. Significant relationship was noted between overexpression of pSTAT3 and STAT3 (P < 0.001), pSTAT3 and VEGF (P = 0.044), pSTAT3 and MMP-7 (P = 0.003), and STAT3 and VEGF (P = 0.037) but marginal association was detected between STAT3 and MMP-7 (P = 0.057), and MMP-7 and VEGF (P = 0.052). Conclusion:?Our data suggest that expression of these genes?may have an important role in tumor dedifferentiation and?may be useful as indicators of biologic aggressiveness. Co-expression of the biomarkers by cancer cells?may have important implications in colorectal cancer biology and?could be useful biological markers of the malignant phenotype.
基金for providing the Py17XNL strain and the Malaria Research and Reference Reagent Resource Center (MR4, MAL88851-01265293) for donating the Py17XL strain of Plasmodium yoelii.
文摘Signal transducer and activator of transcription （STAT） proteins play an important role in cytokine signaling pathways and regulation of immune responses. The balance of the phosphorylated （activated） STAT1 （pSTAT1） and STAT3 （pSTAT3） has been documented in cancer immunology. In this study, we investigated the dynamic balance of pSTAT1 and pSTAT3 in C57BL/6 mice infected with either a nonlethal （Py17XNL） or lethal （Py17XL） strain of Plasmodium yoelii. Both Py17XNL and Py17XL infections induced a maximum activation of STAT1 and STAT3 on the first day after parasite inoculation. Additionally, the Py17XNL infection induced a pSTAT1- dominant response in mice during the early stage of infection, with the resolution of parasitemia. In contrast, Py17XL infection induced a pSTAT3-dominant response during the early phase of infection, with the death of the animals. Our results indicated that maximum activation of STAT1 and STAT3 occurred much earlier than the peak levels of cytokines induced by Plasmodium yoelii infection based on previous reports and that infection with Py17XNL and Py17XL induced different dynamic patterns of pSTAT1 and pSTAT3 balance.
文摘目的:建立脾虚银屑病样小鼠模型,观察健脾养血解毒方对其银屑病样皮损的干预作用,并探讨其作用机制。方法:首先采用苦寒泻下结合营养限制法建立脾虚小鼠模型,持续15 d后检测验证,将脾虚小鼠随机分为单纯脾虚组(脾虚-Ctr)、脾虚银屑病样组(脾虚-IMQ)、阳性对照组(脾虚-MTX)和健脾养血解毒方高、中、低剂量组(JPYXJD-H,M,L),采用咪喹莫特诱导-银屑病样模型。观察各组小鼠皮损面积和疾病严重程度(psoriasis area and severity index,PASI),每日拍照记录;治疗后第6天取材,计算脾脏及淋巴结指数;光镜下观察皮损组织形态学变化及表皮层厚度;免疫组织化学法检测皮损中PCNA和CD3的表达;流式细胞术检测小鼠淋巴结中Treg和Th17细胞数量;RT-PCR技术检测皮损中IL-17A、IL-23、FOXP3、ROR-γt等相关基因表达水平;采用Western Blotting法检测pSTAT3、PPAR-γ通路蛋白表达水平。结果:(1)与对照组小鼠相比,脾虚组表观指征异常明显,血清中D-木糖含量明显降低(P<0.05)。(2)与脾虚-Ctr组相比,脾虚-IMQ组小鼠皮损PASI评分及表皮厚度明显增加,皮损部位PCNA、CD3阳性个数显著增多,IL-17、IL-23、ROR-γt和IFN-γ等炎症因子的表达明显升高,pSTAT蛋白表达升高而PPAR-γ蛋白表达降低的趋势明显。JPYXJD-H、M、L组与其相比各项指标均有不同程度改善,其中以JPYXJD-L组最为显著。结论:健脾养血解毒方在传统理血解毒的基础上强调健脾治法,并依此增加健脾药的使用,从而发挥对脾虚证-银屑病复合模型小鼠皮损的干预作用,通过PPAR-γ/pSTAT3通路调节Treg/Th17之间的免疫平衡可能是其有效作用机制之一。
文摘目的观察鼻息肉患者磷酸化信号转导与转录激活因子3(phospho-signal transducers and activators of transcription,p-STAT3)、SOCS3(suppressor of cytokine signaling,SOCS3)及Th17相关因子的水平,初步探讨STAT3及SOCS3对鼻息肉患者Th17细胞功能的作用。方法选取40例鼻息肉患者标本及15例对照组标本,采用免疫组化和蛋白免疫印迹法检测p-STAT3及SOCS3在鼻息肉组织中的分布及表达,运用ELISA法检测IL-6和IL-17A的表达情况,采用RT-PCR检测RORγt的表达水平,并对数据进行统计学分析。结果鼻息肉组的p-STAT3、IL-6、IL-17A以及RORγt表达明显高于对照组(P<0.01),SOCS3在鼻息肉组中的表达则低于对照组(P<0.01)。相关性分析显示p-STAT3、RORγt及IL-17A与SOCS3呈负相关(p-STAT3/SOCS3:r=-0.545,P<0.01;RORγt/SOCS3:r=-0.627,P<0.05;IL-17A/SOCS3:r=-0.631,P<0.01),而p-STAT3与RORγt、IL-6、IL-17A呈正相关(p-STAT3/RORγt:r=0.594,P<0.001;p-STAT3/IL-6:r=0.632,P<0.001;p-STAT3/IL-17A:r=0.647,P<0.01)。结论 STAT3异常活化,以及SOCS3低表达所致抑制作用缺失可能是造成鼻息肉中Th17细胞过度活化的重要原因。
