目的探讨果蝇双翅边缘缺刻同源基因(Notch)信号通路在慢性阻塞性肺疾病(COPD)辅助性T细胞1(Helper T cells 1,Th1)和辅助性T细胞2(Helper T cells 2,Th2)失衡中的作用及芪蛭皱肺颗粒的干预机制。方法70只Wistar大鼠随机挑选10只作为空...目的探讨果蝇双翅边缘缺刻同源基因(Notch)信号通路在慢性阻塞性肺疾病(COPD)辅助性T细胞1(Helper T cells 1,Th1)和辅助性T细胞2(Helper T cells 2,Th2)失衡中的作用及芪蛭皱肺颗粒的干预机制。方法70只Wistar大鼠随机挑选10只作为空白对照组,其余大鼠均采用香烟烟雾(CS)联合气管滴注脂多糖(Lipopolysaccharide,LPS)法建立COPD模型,空白对照组及造模组各随机挑选3只大鼠验证造模是否成功。造模结束进行灌胃给药干预,造模组大鼠随机分为模型对照组、阳性对照组(67.5μg·kg^(-1))及芪蛭皱肺颗粒高中低剂量组(3.24、1.62、0.81 g·kg^(-1)),分别给予生理盐水、醋酸地塞米松混悬液、芪蛭皱肺高、中、低剂量混悬液进行灌胃干预,空白对照组同模型对照组,灌胃等体积生理盐水。经28天造模及28天治疗后,采用动物肺功能测试系统检测吸气峰流速(Peak Inspiratory Flow,PIF)和呼气峰流速(Peak Expiratory Flow,PEF),处死大鼠提取肺脏、脾脏、血清及支气管肺泡灌洗液(BALF),苏木素-伊红(HE)染色评价肺组织病理变化,酶联免疫吸附实验法(ELISA)测定血清及BALF中肿瘤坏死因子-α(TNF-α)含量,流式细胞仪检测脾脏Th1/Th2细胞水平,免疫组织化学法(Immunohistochemistry,IHC)及蛋白免疫印迹法(Western blot)检测肺组织Notch1、Hes家族发状分裂相关增强子1(Hes1)、Hey家族发状分裂相关增强子1(Hey1)蛋白水平,实时荧光定量聚合酶链式反应(Real-time PCR,RT-PCR)检测肺组织Notch1、Hes1、Hey1基因表达水平。结果与空白对照组比较,模型对照组大鼠肺功能显著降低(P<0.05),肺组织出现炎性细胞浸润、支气管结构破坏等病变,血清及BALF中TNF-α含量显著升高(P<0.05),脾Th1细胞百分比显著降低(P<0.05),Th2细胞百分比显著升高(P<0.05),肺组织Notch1、Hes1、Hey1蛋白及mRNA表达显著升高(P<0.05),差异均具有统计学意义;与模型对照组比较,各给药组大鼠肺功能显著升高(P<0.05),肺组织病理损伤均有所减轻,血清及BALF中TNF-α含量显著降低(P<0.05),脾Th1细胞百分比显著升高(P<0.05),Th2细胞百分比显著降低(P<0.05),肺组织Notch1、Hes1、Hey1蛋白及mRNA表达显著降低(P<0.05),差异均具有统计学意义。结论芪蛭皱肺颗粒通过抑制Notch信号通路调节Th1/Th2平衡,从而改善COPD大鼠肺功能及病理损伤,影响其免疫功能。展开更多
Objective： IL-22-producing CD4＋ T helper cells （Th22 cells） have been identified as major inducers of tissue inflammation and immune responses. Currently, no previous study explored the role of Th22 cells in the p...Objective： IL-22-producing CD4＋ T helper cells （Th22 cells） have been identified as major inducers of tissue inflammation and immune responses. Currently, no previous study explored the role of Th22 cells in the pathogenesis of hepatocellular carcinoma （HCC）. The study aimed to determine the biological function of Th22 cells and its effector IL-22 in HCC patients. Methods： Forty-five HCC patients and 19 healthy controls were recruited and their peripheral blood was collected. The flesh HCC tissues, adjacent HCC tissues and ten normal liver tissues were also collected. Flow cytometry analysis was used to determine the frequencies of circulating Th22 cells and Thl7 cells. Serum IL-22 levels were tested by enzyme-linked immtmosorbent assay （ELISA）. Immunohistochemical staining and real-time polymerase chain reaction （PCR） were used to detect IL-22 protein and mRNA in tissues specimens, respectively. Results： Circulating Th22 cells, Thl7 cells and serum IL-22 levels were significantly elevated in HCC patients compared with those of healthy controls （P〈0.001）. Th22 cells were showed to be positively correlated with IL-22 in HCC patients （P〈0.05）, but not in healthy controls. No significant differences were found in HCC patients with HBeAg positivity or negativity in term of Th22 cells and serum IL-22 levels. The expression of IL-22 protein and mRNA was highest in HCC tissues, followed by adjacent HCC tissues and normal liver tissues. Furthermore, Th22 cells, serum IL-22 levels and IL-22 mRNA were elevated at stage III-IV compared with stage I-II of HCC （P〈0.05）. Conclusions： Elevation of circulating Th22 cells and IL-22 may be implicated in the pathogenesis of HCC, and potentially be cellular targets for therapeutic intervention.展开更多
基金supported by research funding from the National Natural Science Foundation (No. 81260083) and National Natural Science Foundation (No. 31360221)
文摘Objective： IL-22-producing CD4＋ T helper cells （Th22 cells） have been identified as major inducers of tissue inflammation and immune responses. Currently, no previous study explored the role of Th22 cells in the pathogenesis of hepatocellular carcinoma （HCC）. The study aimed to determine the biological function of Th22 cells and its effector IL-22 in HCC patients. Methods： Forty-five HCC patients and 19 healthy controls were recruited and their peripheral blood was collected. The flesh HCC tissues, adjacent HCC tissues and ten normal liver tissues were also collected. Flow cytometry analysis was used to determine the frequencies of circulating Th22 cells and Thl7 cells. Serum IL-22 levels were tested by enzyme-linked immtmosorbent assay （ELISA）. Immunohistochemical staining and real-time polymerase chain reaction （PCR） were used to detect IL-22 protein and mRNA in tissues specimens, respectively. Results： Circulating Th22 cells, Thl7 cells and serum IL-22 levels were significantly elevated in HCC patients compared with those of healthy controls （P〈0.001）. Th22 cells were showed to be positively correlated with IL-22 in HCC patients （P〈0.05）, but not in healthy controls. No significant differences were found in HCC patients with HBeAg positivity or negativity in term of Th22 cells and serum IL-22 levels. The expression of IL-22 protein and mRNA was highest in HCC tissues, followed by adjacent HCC tissues and normal liver tissues. Furthermore, Th22 cells, serum IL-22 levels and IL-22 mRNA were elevated at stage III-IV compared with stage I-II of HCC （P〈0.05）. Conclusions： Elevation of circulating Th22 cells and IL-22 may be implicated in the pathogenesis of HCC, and potentially be cellular targets for therapeutic intervention.
