目的:观察CD4+T细胞及其共刺激分子(CSF)在湿热型溃疡性结肠炎(UC)大鼠肠黏膜中的表达及分布,探讨黄芩汤治疗该病可能的免疫学机制。方法:采用高脂、高糖饲料联合人工气候箱法造出湿热型体质,结合三硝基苯磺酸(TNBS)灌肠法建立湿热型UC...目的:观察CD4+T细胞及其共刺激分子(CSF)在湿热型溃疡性结肠炎(UC)大鼠肠黏膜中的表达及分布,探讨黄芩汤治疗该病可能的免疫学机制。方法:采用高脂、高糖饲料联合人工气候箱法造出湿热型体质,结合三硝基苯磺酸(TNBS)灌肠法建立湿热型UC模型;造模成功后将大鼠分为模型组、黄芩汤组及美沙拉嗪组,用免疫组化SP法检测大鼠结肠黏膜CD4+T细胞,CD28,CD152,OX40T细胞亚型的表达及分布,通过图像数码采集系统及Image pro plus 6.0软件分析平均光密度,以检测各分子表达含量。结果:与正常对照组比较,造模大鼠结肠中CD4+T细胞、CD28,CD152,OX40等T细胞亚型升高(P<0.05),主要分布于黏膜下层及固有肌层;治疗后,黄芩汤和美沙拉嗪组大鼠结肠中CD4+T细胞,CD28,OX40T细胞亚型表达均下降(P<0.05),但CD152的表达无明显变化且维持在模型组水平;黄芩汤组及美沙拉嗪组以上各分子的表达均无统计学差异。结论:黄芩汤可能通过调节CD4+T细胞的CSF的表达含量从而发挥对溃疡性结肠炎的免疫调节作用。展开更多
Although oxymatrine(OMT) has been shown to directly inhibit the replication of hepatitis B virus(HBV) in vitro, limited research has been done with this drug in vivo. In the present study, the antiviral effect of OMT ...Although oxymatrine(OMT) has been shown to directly inhibit the replication of hepatitis B virus(HBV) in vitro, limited research has been done with this drug in vivo. In the present study, the antiviral effect of OMT was investigated in an immunocompetent mouse model of chronic HBV infection.The infection was achieved by tail vein injection of a large volume of DNA solution. OMT(2.2, 6.7 and20 mg/kg) was administered by daily intraperitoneal injection for 6 weeks. The efficacy of OMT was evaluated by the levels of HBV DNA, hepatitis B surface antigen(HBs Ag), hepatitis B e antigen(HBe Ag)and hepatitis B core antigen(HBc Ag). The immunoregulatory activity of OMT was evaluated by serum ELISA and flow cytometry. Results shows that OMT at 20 mg/kg inhibited HBV replication, and it was more efficient than entecavir(ETV) in the elimination of serum HBs Ag and intrahepatic HBc Ag. Inaddition, OMT accelerated the production of interferon-γ(IFN-γ) in a dose-dependent manner in CD4^+T cells. Our findings demonstrate the beneficial effects of OMT on the enhancement of immunological function and in the control of HBV antigens. The findings suggest this drug to be a good antiviral therapeutic candidate for the treatment of HBV infection.展开更多
文摘目的:观察CD4+T细胞及其共刺激分子(CSF)在湿热型溃疡性结肠炎(UC)大鼠肠黏膜中的表达及分布,探讨黄芩汤治疗该病可能的免疫学机制。方法:采用高脂、高糖饲料联合人工气候箱法造出湿热型体质,结合三硝基苯磺酸(TNBS)灌肠法建立湿热型UC模型;造模成功后将大鼠分为模型组、黄芩汤组及美沙拉嗪组,用免疫组化SP法检测大鼠结肠黏膜CD4+T细胞,CD28,CD152,OX40T细胞亚型的表达及分布,通过图像数码采集系统及Image pro plus 6.0软件分析平均光密度,以检测各分子表达含量。结果:与正常对照组比较,造模大鼠结肠中CD4+T细胞、CD28,CD152,OX40等T细胞亚型升高(P<0.05),主要分布于黏膜下层及固有肌层;治疗后,黄芩汤和美沙拉嗪组大鼠结肠中CD4+T细胞,CD28,OX40T细胞亚型表达均下降(P<0.05),但CD152的表达无明显变化且维持在模型组水平;黄芩汤组及美沙拉嗪组以上各分子的表达均无统计学差异。结论:黄芩汤可能通过调节CD4+T细胞的CSF的表达含量从而发挥对溃疡性结肠炎的免疫调节作用。
基金supported by a key project of the National Natural Science Foundation of China(No.81330090)the Chinese Medicine Antiviral Collaborative Innovation Center(No.XTCX2014B01-06)
文摘Although oxymatrine(OMT) has been shown to directly inhibit the replication of hepatitis B virus(HBV) in vitro, limited research has been done with this drug in vivo. In the present study, the antiviral effect of OMT was investigated in an immunocompetent mouse model of chronic HBV infection.The infection was achieved by tail vein injection of a large volume of DNA solution. OMT(2.2, 6.7 and20 mg/kg) was administered by daily intraperitoneal injection for 6 weeks. The efficacy of OMT was evaluated by the levels of HBV DNA, hepatitis B surface antigen(HBs Ag), hepatitis B e antigen(HBe Ag)and hepatitis B core antigen(HBc Ag). The immunoregulatory activity of OMT was evaluated by serum ELISA and flow cytometry. Results shows that OMT at 20 mg/kg inhibited HBV replication, and it was more efficient than entecavir(ETV) in the elimination of serum HBs Ag and intrahepatic HBc Ag. Inaddition, OMT accelerated the production of interferon-γ(IFN-γ) in a dose-dependent manner in CD4^+T cells. Our findings demonstrate the beneficial effects of OMT on the enhancement of immunological function and in the control of HBV antigens. The findings suggest this drug to be a good antiviral therapeutic candidate for the treatment of HBV infection.
