目的探讨半乳凝素-10(galectin-10)在CD4+CD25+CD127low/-调节性T细胞(regulatory T cell,Treg)中的表达及其与Foxp3的相关性。方法通过流式细胞术分选健康人外周血和胃癌患者癌旁淋巴结中Treg细胞与CD4+CD25-CD127+T细胞,经微量抽提RNA...目的探讨半乳凝素-10(galectin-10)在CD4+CD25+CD127low/-调节性T细胞(regulatory T cell,Treg)中的表达及其与Foxp3的相关性。方法通过流式细胞术分选健康人外周血和胃癌患者癌旁淋巴结中Treg细胞与CD4+CD25-CD127+T细胞,经微量抽提RNA后,用RT-PCR检测galectin-10和Foxp3的mRNA表达水平。结果galectin-10和Foxp3的mRNA显著表达于Treg细胞,几乎不表达于CD4+CD25-CD127+T细胞。健康人外周血和胃癌患者癌旁淋巴结中的结果一致。结论ga-lectin-10基因高表达于Treg细胞中,可以作为Treg细胞一项新的标志物。展开更多
目的检测乙肝肝硬化患者外周血中25-(OH)D3、Th17、CD4^+Treg细胞变化,为维生素D治疗乙肝肝硬化提供依据。方法选取乙肝肝硬化患者21例,正常对照者15例,采用电化学发光免疫测定法检测25-(OH)D3水平,采用流式细胞仪检测Th17细胞、CD4^+T...目的检测乙肝肝硬化患者外周血中25-(OH)D3、Th17、CD4^+Treg细胞变化,为维生素D治疗乙肝肝硬化提供依据。方法选取乙肝肝硬化患者21例,正常对照者15例,采用电化学发光免疫测定法检测25-(OH)D3水平,采用流式细胞仪检测Th17细胞、CD4^+Treg细胞水平,并计算Th17/Treg比率。结果健康对照组外周血25-(OH)D3为(31.87±5.97)ng/ml,乙肝肝硬化组25-(OH)D3明显降低,为(11.89±6.04)ng/ml,两者相比差异具有统计学意义(t=9.510,P=0.001)。与健康对照组相比,乙肝肝硬化组外周血Th17细胞百分比(0.913%±0.216%vs 2.498%±2.583%)增高,CD4^+Treg细胞百分比降低(3.964%±1.116%vs 2.333%±1.714%),Th17/Treg比率(1.199±0.973 vs 0.256±0.138)增高,差异均有统计学意义(P<0.05)。结论乙肝肝硬化患者外周血25-(OH)D3水平显著降低,Th17增高,CD4^+Treg降低,存在CD4^+Treg、Th17、Treg/Th17免疫平衡紊乱,增加外周血25-(OH)D3水平有可能调节乙肝肝硬化患者体内CD4^+Treg、Th17、Treg/Th17变化,改变其免疫状态。展开更多
OBJECTIVE CD4^＋CD25^＋ T regulatory （Treg） cells are a population of T cells which suppress an overactive immune system. CCR4 is a chemokine receptor involved in the recruitment of lymphocytes. Nasopharyngeal carci...OBJECTIVE CD4^＋CD25^＋ T regulatory （Treg） cells are a population of T cells which suppress an overactive immune system. CCR4 is a chemokine receptor involved in the recruitment of lymphocytes. Nasopharyngeal carcinoma （NPC） is resistant to immunosurveillance, owing to the increased number of tumor-infiltrating Treg cells which are recruited to the tumor bv CCR4.展开更多
Objective Age-related increment of the prevalence of CD4^＋CD25^＋ regulatory T （Treg） cells were described controversially, and whether such changes explain immune dysfunction in the elderly is still unclear. The a...Objective Age-related increment of the prevalence of CD4^＋CD25^＋ regulatory T （Treg） cells were described controversially, and whether such changes explain immune dysfunction in the elderly is still unclear. The aim of this systematic review is to evaluate the role of the Tregs in immunosenescence. Methods Medline and manual searches were performed to identify all published epidemiological and animal studies investigating the efficacy of the association between immunosenescence and Treg cells. Results It was founded that the frequency, phenotypic characteristics, and number/function of Tregs were altered significantly with aging. Medical conditions in individuals with advanced ageas well as apoptosis intensity of Treg cells had an impact on the accumulation of Tregs which in turn could deteriorate cytotoxic activity of CD8＋ T and NK cells and production of IL-2. The range of immune cells that could be suppressed by Treg cells was quite wide and covered CD4^＋CD25^＋ T cells, NK cells, dendritic cells and even monocytes. These changes were observed both in humans and experimental animals. Besides, it was believed that frequency of Tregs increased with age and was accompanied by intensified suppressive activity for Tregs in patients, for example, with Alzheimer disease （AD） and Parkinson disease （PD）. The impaired condition of CD4＋ T cells, so-called immunosenescence, rendered transplant recipients less responsive to an allogeneic kidney graft, an effect that was limited to transplant recipients who were aged over 60 years. Conclusions Treg cells are associated with immunosenescence. All these changes contribute to the aging-related decline of immune responses and lead to the higher risk of immune-mediated diseases, cancer or infections in aged individuals.展开更多
文摘目的探讨半乳凝素-10(galectin-10)在CD4+CD25+CD127low/-调节性T细胞(regulatory T cell,Treg)中的表达及其与Foxp3的相关性。方法通过流式细胞术分选健康人外周血和胃癌患者癌旁淋巴结中Treg细胞与CD4+CD25-CD127+T细胞,经微量抽提RNA后,用RT-PCR检测galectin-10和Foxp3的mRNA表达水平。结果galectin-10和Foxp3的mRNA显著表达于Treg细胞,几乎不表达于CD4+CD25-CD127+T细胞。健康人外周血和胃癌患者癌旁淋巴结中的结果一致。结论ga-lectin-10基因高表达于Treg细胞中,可以作为Treg细胞一项新的标志物。
文摘目的检测乙肝肝硬化患者外周血中25-(OH)D3、Th17、CD4^+Treg细胞变化,为维生素D治疗乙肝肝硬化提供依据。方法选取乙肝肝硬化患者21例,正常对照者15例,采用电化学发光免疫测定法检测25-(OH)D3水平,采用流式细胞仪检测Th17细胞、CD4^+Treg细胞水平,并计算Th17/Treg比率。结果健康对照组外周血25-(OH)D3为(31.87±5.97)ng/ml,乙肝肝硬化组25-(OH)D3明显降低,为(11.89±6.04)ng/ml,两者相比差异具有统计学意义(t=9.510,P=0.001)。与健康对照组相比,乙肝肝硬化组外周血Th17细胞百分比(0.913%±0.216%vs 2.498%±2.583%)增高,CD4^+Treg细胞百分比降低(3.964%±1.116%vs 2.333%±1.714%),Th17/Treg比率(1.199±0.973 vs 0.256±0.138)增高,差异均有统计学意义(P<0.05)。结论乙肝肝硬化患者外周血25-(OH)D3水平显著降低,Th17增高,CD4^+Treg降低,存在CD4^+Treg、Th17、Treg/Th17免疫平衡紊乱,增加外周血25-(OH)D3水平有可能调节乙肝肝硬化患者体内CD4^+Treg、Th17、Treg/Th17变化,改变其免疫状态。
基金the National Natural Science Foundation of China
文摘OBJECTIVE CD4^＋CD25^＋ T regulatory （Treg） cells are a population of T cells which suppress an overactive immune system. CCR4 is a chemokine receptor involved in the recruitment of lymphocytes. Nasopharyngeal carcinoma （NPC） is resistant to immunosurveillance, owing to the increased number of tumor-infiltrating Treg cells which are recruited to the tumor bv CCR4.
基金supported by the National Natural Science Foundation of China (No.30330540)the Jiangsu Provincial Fund for Clinical Immunology Key Laboratory (No.200319)the Scientific and Technological Fund to Support Project of Suzhou City (ZS0901)
文摘Objective Age-related increment of the prevalence of CD4^＋CD25^＋ regulatory T （Treg） cells were described controversially, and whether such changes explain immune dysfunction in the elderly is still unclear. The aim of this systematic review is to evaluate the role of the Tregs in immunosenescence. Methods Medline and manual searches were performed to identify all published epidemiological and animal studies investigating the efficacy of the association between immunosenescence and Treg cells. Results It was founded that the frequency, phenotypic characteristics, and number/function of Tregs were altered significantly with aging. Medical conditions in individuals with advanced ageas well as apoptosis intensity of Treg cells had an impact on the accumulation of Tregs which in turn could deteriorate cytotoxic activity of CD8＋ T and NK cells and production of IL-2. The range of immune cells that could be suppressed by Treg cells was quite wide and covered CD4^＋CD25^＋ T cells, NK cells, dendritic cells and even monocytes. These changes were observed both in humans and experimental animals. Besides, it was believed that frequency of Tregs increased with age and was accompanied by intensified suppressive activity for Tregs in patients, for example, with Alzheimer disease （AD） and Parkinson disease （PD）. The impaired condition of CD4＋ T cells, so-called immunosenescence, rendered transplant recipients less responsive to an allogeneic kidney graft, an effect that was limited to transplant recipients who were aged over 60 years. Conclusions Treg cells are associated with immunosenescence. All these changes contribute to the aging-related decline of immune responses and lead to the higher risk of immune-mediated diseases, cancer or infections in aged individuals.
