目的:通过检测梅毒血清固定患者外周血CD4^+CD25^+调节性T细胞(regulatory T ceIls,Treg)比例和功能的改变,探讨Treg在梅毒血清固定现象形成中的作用。方法:收集梅毒血清固定患者26例,正常对照23例,利用流式细胞术分别检测外周血Treg比...目的:通过检测梅毒血清固定患者外周血CD4^+CD25^+调节性T细胞(regulatory T ceIls,Treg)比例和功能的改变,探讨Treg在梅毒血清固定现象形成中的作用。方法:收集梅毒血清固定患者26例,正常对照23例,利用流式细胞术分别检测外周血Treg比例及Treg内Foxp3、细胞毒性T淋巴细胞抗原(CTLA)-4及白介素(IL)-10的定量表达情况。结果:梅毒血清固定组患者外周血Treg比例明显高于正常对照组(P<0.01);且Treg内转录因子Foxp3及功能性分子CTLA-4和IL-10的表达量也明显高于正常对照组(P<0.05或P<0.01)。结论:梅毒血清固定患者外周血Treg比例和功能的异常,可能是导致该现象形成的重要原因之一。展开更多
目的探讨Treg及Th1/Th2类细胞因子在晚期肺癌肿瘤免疫抑制中的作用。方法选取100例初治晚期肺癌患者及50例健康自愿者。采用流式细胞术检测其外周血中Treg、Th1类细胞因子(IFN-γ、IL-2、TNF-a)、Th2类细胞因子(IL-4、IL-6、IL-10)水平...目的探讨Treg及Th1/Th2类细胞因子在晚期肺癌肿瘤免疫抑制中的作用。方法选取100例初治晚期肺癌患者及50例健康自愿者。采用流式细胞术检测其外周血中Treg、Th1类细胞因子(IFN-γ、IL-2、TNF-a)、Th2类细胞因子(IL-4、IL-6、IL-10)水平,同时分析CD4^+CD25^+Treg与Th1/Th2类细胞因子之间的相关性。结果 (1)晚期肺癌患者外周血中Treg为(11.12±5.83)%,高于健康对照组(7.46±3.07)%,差异有统计学意义(P=0.003);(2)化疗前肺癌患者外周血中Treg为(11.12±5.83)%,明显高于化疗后(6.45±3.74)%,差异有统计学意义(P<0.001);(3)晚期肺癌患者与正常对照组Th1/Th2类细胞因子水平分别为:IFN-γ(8.56±3.62 vs 10.79±3.27,P=0.049)、IL-2(8.48±2.87 vs10.22±4.03,P=0.03)、TNF-a(6.18±2.67vs8.14±2.87,P=0.007)、IFN-γ/IL-4(3.33±1.44 vs 4.09±1.00,P=0.028)、IL-4(3.17±1.19 vs 2.45±0.43,P<0.001)、IL-6(3.88±2.08 vs 2.33±0.88,P<0.001)、IL-10(3.64±1.73 vs2.54±1.08,P=0.008),其中Th2类因子水平明显升高,差异有统计学意义(P均<0.05);(4)CD4^+CD25^+Treg与Th1类细胞因子IFN-γ、TNF-a、IL-2及IL-6无相关性(P均>0.05);与Th1/Th2(γ=-0.273,P=0.003)呈负相关;与Th2类细胞因子IL-4(γ=0.237,P=0.009)、IL-10(0.626,P<0.001)呈正相关(P均<0.05)。结论晚期肺癌患者CD4^+CD25^+Treg、Th2类细胞因子水平显著升高,Th1类细胞因子水平下降,它们共同导致肿瘤患者免疫抑制及肿瘤进展,监测其水平变化有助于判断肺癌患者疗效、预后,有效调控CD4^+CD25^+Treg及负性细胞因子水平可能是治疗肺癌的一个新策略。展开更多
目的 通过替比夫定对慢性HBV(Hepatitis B Virus)感染妊娠妇女外周血细胞CD4+CD25+调节性T细胞(CD4+CD25+ regulatory T cells)细胞率影响,探讨乙肝病毒宫内感染的可能作用机制.方法 选取慢性HBV感染孕妇100例,分为治疗组和对照...目的 通过替比夫定对慢性HBV(Hepatitis B Virus)感染妊娠妇女外周血细胞CD4+CD25+调节性T细胞(CD4+CD25+ regulatory T cells)细胞率影响,探讨乙肝病毒宫内感染的可能作用机制.方法 选取慢性HBV感染孕妇100例,分为治疗组和对照组,治疗前及治疗后1月、3月、分娩前流式细胞术检测孕产妇Tregs比率,新生儿出生后检测乙肝五项及HBVDNA定量,酶联免疫吸附法检测乙肝五项,实时荧光定量PCR检测孕妇及新生儿HBVDNA定量,全自动生化分析仪检测孕妇肝功能.结果 对照组孕妇所生49例新生儿中,有5例HBsAg阳性,阳性率为11.2%,治疗组孕妇所生50例新生儿中有0例HBsAg阳性,阳性率为0%,两组相比差异具有统计学意义(x2=5.373,P<0.05).治疗组孕妇外周血Tregs比率治疗前、治疗后1月、3月、分娩前Tregs分别为(4.85±1.83)%、(3.26±1.39)%、(2.24±1.47)%、(1.78±0.56)%,对照组妇外周血Tregs比率治疗前、治疗后1月、3月、分娩前外周血Tregs比例分别为:(4.62±2.01)%、(4.59±2.51)%、(3.42±2.90)%、(1.99±1.64)%.妊娠时间与替比夫定抗病毒治疗之间有交互作用(F=3.88,P<0.05),治疗组与对照组CD4+CD25+调节性T细胞的差异有统计学意义(F=10.56,P<0.05).治疗前后不同时间的CD4+CD25+调节性T细胞的差异有统计学意义(F=42.39,P< 0.001).结论 替比夫定能降低乙肝母婴垂直传播,降低妊娠妇女Tregs细胞比率.展开更多
Cellular senescence is a signal transduction process which maintained genomic stability and stopped mammalian cell growth. Furthermore, cellular senescence induces a protective response to a variety of DNA damage. How...Cellular senescence is a signal transduction process which maintained genomic stability and stopped mammalian cell growth. Furthermore, cellular senescence induces a protective response to a variety of DNA damage. However, this process is also associated with apoptosis, upregulated secretion of inflammatory cytokine, and promoted surrounding tissue damage. When cellular senescence accumulates to a certain extent, it triggers geriatric diseases, such as chronic inflammation, immune senescence-associated tumors and incontrollable infections. Cellular senescence gene SENEX, which was cloned in 2004, has been demonstrated to play a unique gatekeeper function in human endothelial cells when stress-induced pre-mature senescence and apoptosis occurr. The phenomenon that CD4+CD25+ Treg cells accumulated in the aged population has been well studied in recent years. Now Treg accumulation related to immune-pathology has attracted more interest. CD4+CD25+ Treg did not decline and age, but accumulated and suppressed immunoreaction. The enhanced Treg number and function may be associated with stress-induced premature senescence-mediated unique cellular senescence protection mechanisms, and SENEX may play a critical role in this process. In this article, we summarize the cellular senescence and SENEX gene in the accumulation and functional activity of CD4+CD25+ Treg in the elderly.展开更多
文摘目的:通过检测梅毒血清固定患者外周血CD4^+CD25^+调节性T细胞(regulatory T ceIls,Treg)比例和功能的改变,探讨Treg在梅毒血清固定现象形成中的作用。方法:收集梅毒血清固定患者26例,正常对照23例,利用流式细胞术分别检测外周血Treg比例及Treg内Foxp3、细胞毒性T淋巴细胞抗原(CTLA)-4及白介素(IL)-10的定量表达情况。结果:梅毒血清固定组患者外周血Treg比例明显高于正常对照组(P<0.01);且Treg内转录因子Foxp3及功能性分子CTLA-4和IL-10的表达量也明显高于正常对照组(P<0.05或P<0.01)。结论:梅毒血清固定患者外周血Treg比例和功能的异常,可能是导致该现象形成的重要原因之一。
文摘目的探讨Treg及Th1/Th2类细胞因子在晚期肺癌肿瘤免疫抑制中的作用。方法选取100例初治晚期肺癌患者及50例健康自愿者。采用流式细胞术检测其外周血中Treg、Th1类细胞因子(IFN-γ、IL-2、TNF-a)、Th2类细胞因子(IL-4、IL-6、IL-10)水平,同时分析CD4^+CD25^+Treg与Th1/Th2类细胞因子之间的相关性。结果 (1)晚期肺癌患者外周血中Treg为(11.12±5.83)%,高于健康对照组(7.46±3.07)%,差异有统计学意义(P=0.003);(2)化疗前肺癌患者外周血中Treg为(11.12±5.83)%,明显高于化疗后(6.45±3.74)%,差异有统计学意义(P<0.001);(3)晚期肺癌患者与正常对照组Th1/Th2类细胞因子水平分别为:IFN-γ(8.56±3.62 vs 10.79±3.27,P=0.049)、IL-2(8.48±2.87 vs10.22±4.03,P=0.03)、TNF-a(6.18±2.67vs8.14±2.87,P=0.007)、IFN-γ/IL-4(3.33±1.44 vs 4.09±1.00,P=0.028)、IL-4(3.17±1.19 vs 2.45±0.43,P<0.001)、IL-6(3.88±2.08 vs 2.33±0.88,P<0.001)、IL-10(3.64±1.73 vs2.54±1.08,P=0.008),其中Th2类因子水平明显升高,差异有统计学意义(P均<0.05);(4)CD4^+CD25^+Treg与Th1类细胞因子IFN-γ、TNF-a、IL-2及IL-6无相关性(P均>0.05);与Th1/Th2(γ=-0.273,P=0.003)呈负相关;与Th2类细胞因子IL-4(γ=0.237,P=0.009)、IL-10(0.626,P<0.001)呈正相关(P均<0.05)。结论晚期肺癌患者CD4^+CD25^+Treg、Th2类细胞因子水平显著升高,Th1类细胞因子水平下降,它们共同导致肿瘤患者免疫抑制及肿瘤进展,监测其水平变化有助于判断肺癌患者疗效、预后,有效调控CD4^+CD25^+Treg及负性细胞因子水平可能是治疗肺癌的一个新策略。
文摘Cellular senescence is a signal transduction process which maintained genomic stability and stopped mammalian cell growth. Furthermore, cellular senescence induces a protective response to a variety of DNA damage. However, this process is also associated with apoptosis, upregulated secretion of inflammatory cytokine, and promoted surrounding tissue damage. When cellular senescence accumulates to a certain extent, it triggers geriatric diseases, such as chronic inflammation, immune senescence-associated tumors and incontrollable infections. Cellular senescence gene SENEX, which was cloned in 2004, has been demonstrated to play a unique gatekeeper function in human endothelial cells when stress-induced pre-mature senescence and apoptosis occurr. The phenomenon that CD4+CD25+ Treg cells accumulated in the aged population has been well studied in recent years. Now Treg accumulation related to immune-pathology has attracted more interest. CD4+CD25+ Treg did not decline and age, but accumulated and suppressed immunoreaction. The enhanced Treg number and function may be associated with stress-induced premature senescence-mediated unique cellular senescence protection mechanisms, and SENEX may play a critical role in this process. In this article, we summarize the cellular senescence and SENEX gene in the accumulation and functional activity of CD4+CD25+ Treg in the elderly.