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Th17细胞研究进展 总被引:1,自引:0,他引:1
Th17细胞是一类新型CD4+T细胞,它与Th1、Th2、调节性T细胞一起构成了CD4+T细胞的4个主要亚群.Th17细胞的分化过程需要IL-6和转化生长因子-β、转录因子孤独核受体γt及信号传导和转录激活子3等参与,这一分化过程在细胞和分子水平都受到精细的调节.Th17细胞分泌IL-17、IL-22、IL-6等多种细... 相似文献
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近年来,众多研究发现支气管哮喘的发病机制已不能单纯用Th1/Th2平衡理论来解释,CD4+ CD25+调节性T细胞和Th17细胞及其细胞因子IL-10、IL-17、转化生长因子-β等与支气管哮喘发病明显相关.由于Th17细胞与CD4+ CD25+调节性T细胞在功能上相互拮抗,而在分化上密切相关,因此这两种细胞的免疫失衡也是支气管哮喘发病的重要原因.糖皮质激素可通过维甲酸相关孤核受体γt信号途径降低IL-17的表达,还可以通过诱导转录因子Foxp3的表达调控CD4+ CD25+调节性T细胞的分化和功能. 相似文献
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支气管哮喘是一种慢性炎症性气道疾病,以往认为辅助性T细胞1 (Th1) /Th2比例失衡是哮喘发病的重要机制.近年发现了一种以产生IL-17为主要细胞因子的Th17细胞,在哮喘的发病机制中具有重要作用,IL-17还具有对哮喘的负性调节作用,有可能成为治疗哮喘的有意义的靶目标. 相似文献
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国内外研究证实,CD4+ CD25+ Foxp3+调节性T细胞(CD4+ CD25+ Foxp3+ regulatoryTcells,简称Treg细胞)/Th17细胞失衡与多种血液病的发病密切相关.肿瘤性血液病如白血病、淋巴瘤存在Treg细胞水平上调Th17水平下调,可能与Treg诱导免疫抑制增强、Th17介导抗肿瘤免疫缺陷相关;而非肿瘤性血液病如再生障碍性贫血、过敏性紫癜、免疫性血小板减少性紫癜等存在Treg水平下调、Th17水平上调,可能与Th17介导过度免疫损伤、Treg介导免疫抑制功能不足有关.提示Treg细胞/Th17细胞比率升高可能对肿瘤性血液病的发生起促进作用,其比率降低则可能对非肿瘤性血液病的发生起促进作用. 相似文献
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Th17细胞是一种新近发现的CD4+T细胞亚群,是Th1、Th2家族的新成员.近年来研究发现,Th17产生IL-17可诱导支气管上皮细胞、内皮细胞、成纤维细胞分泌IL-6、IL-8、粒细胞集落刺激因子和肿瘤坏死因子-α等细胞因子,促进中性粒细胞在肺部的募集.研究显示Th17在支气管肺发育不良发病机制中起着重要的作用,也为其预防、治疗提供一个新的研究方向. 相似文献
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目的:探讨CD4+CD25+调节性T细胞(Treg)/Th17细胞失衡在儿童再生障碍性贫血(AA)发病中的意义。方法采用流式细胞仪(FCM)检测AA患儿和健康对照组儿童外周血Treg细胞和Th17细胞的比例,酶联免疫吸附法(ELISA)检测血浆中IL-17和IL-6的水平。结果 AA患儿外周血Th17细胞比例(1.45±0.28)%显著高于同龄对照组(0.45±0.10)%(P<0.01),而Treg细胞比例(4.05±1.07)%及 Treg/Th17细胞比值(2.89±0.88)明显低于同龄对照组儿童(6.96±0.79)%、(15.77±2.77)(P<0.01)。AA患儿血浆中IL-17、IL-6水平分别为(185.96±40.42)、(20.78±5.49)pg/mL,显著高于同龄对照组(120.47±18.39)、(10.44±2.51)pg/mL (P<0.01),且IL-17和IL-6水平均与Th17细胞比例呈正相关(r=0.67,P<0.01;r=0.57,P<0.01),而Treg细胞比例与IL-6水平呈负相关(r=-0.39,P<0.05)。结论 AA患儿Treg细胞比例的减低和Th17细胞比例的增加所致的Treg/Th17细胞失衡,可能在儿童再障发病中起重要作用,IL-6高表达可能是导致Tre g/Th 17细胞失衡的原因之一。 相似文献
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近年来对多种自身免疫性疾病研究表明,Th17、滤泡辅助T细胞(follicular helper T cells,Tfh 细胞)通过IL-21、STAT3等细胞因子及信号通路共同参与了多种自身免疫性疾病发病.IL-21作为Th17、Tfh细胞共同的细胞因子,对二者分化发育、功能的发挥具有重要作用.该文就目前Th17、Tfh细胞及其细胞因子在重症肌无力、系统性红斑狼疮和炎症性肠病发病中作用的研究进展进行综述. 相似文献
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Th17细胞是一类新型CD4+T细胞,与Th1、Th2、调节性T细胞一起构成了CD4+T细胞的4个主要亚群.IL-17是Thl7细胞最主要的分泌产物,在自身免疫性疾病、某些感染性疾病以及肿瘤中起到重要的调节作用.因此,Th17细胞及其相关因子可能为此类疾病的治疗提供新的靶点和途径. 相似文献
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??Expression and clinical significance of peripheral Th17 cell in children with acute leukemia.????WU Xiao-yan??JIN Run-ming??YU Hui??WANG Fang??XIA Yi. Pediatrics Department of Union Hospital??Tongji Medical School??Huazhong University of Science and Technology??Wuhan 430022??China
Abstract??Objective??To study the relationship between peripheral blood Th17 cells and the occurrence and status of disease of children with acute leukemia. Methods??From Aug. 2008 to Dec. 2009 in Pediatrics Department of Union Hospital??Tongji Medical School Huazhong University of Science and Technology?? 42 children with acute leukemia and 18 healthy children were divided into non-remission group ??Group A??n = 23????remission group ??Group B??n = 19?? and control group ??Group C??n = 18??. Concentration of IL-17 and IL-23 in the peripheral blood monocytes culture supernatant after stimulated with anti-CD3 and anti-CD28 mAb were determined with ELISA. Expression of CD4+ IL-17+ cells was determined with flow cytometry. Results??The concentrations of IL-17 and IL-23 in Group A and Group B were much lower than those in Group C??P < 0.05??. The level of IL-17 in Group A was lower than that in Group B??P < 0.05????while the difference of IL-23 concentration between Group A and Group B was not significant??P > 0.05??. The expression level of Th17 in Group A and Group B were much lower than those in Group C??P < 0.05????and the difference of Th17 expression level between Group A and Group B was significant??P < 0.05??. Conclusion??Th17 cells might play important role in the occurrence and development of children acute leukemia through secreting IL-17??and their function level can partly reflect the status of leukemia and evaluating the risks of infection in children with leukemia. 相似文献
Abstract??Objective??To study the relationship between peripheral blood Th17 cells and the occurrence and status of disease of children with acute leukemia. Methods??From Aug. 2008 to Dec. 2009 in Pediatrics Department of Union Hospital??Tongji Medical School Huazhong University of Science and Technology?? 42 children with acute leukemia and 18 healthy children were divided into non-remission group ??Group A??n = 23????remission group ??Group B??n = 19?? and control group ??Group C??n = 18??. Concentration of IL-17 and IL-23 in the peripheral blood monocytes culture supernatant after stimulated with anti-CD3 and anti-CD28 mAb were determined with ELISA. Expression of CD4+ IL-17+ cells was determined with flow cytometry. Results??The concentrations of IL-17 and IL-23 in Group A and Group B were much lower than those in Group C??P < 0.05??. The level of IL-17 in Group A was lower than that in Group B??P < 0.05????while the difference of IL-23 concentration between Group A and Group B was not significant??P > 0.05??. The expression level of Th17 in Group A and Group B were much lower than those in Group C??P < 0.05????and the difference of Th17 expression level between Group A and Group B was significant??P < 0.05??. Conclusion??Th17 cells might play important role in the occurrence and development of children acute leukemia through secreting IL-17??and their function level can partly reflect the status of leukemia and evaluating the risks of infection in children with leukemia. 相似文献
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目的探讨支气管哮喘患儿外周血中辅助T细胞(Th)17细胞和CD4+CD25+调节性T细胞(Treg)的变化与儿童哮喘病情的相关性。方法收集2009年月5月至2010年4月于郑州大学第一附属医院就诊的患儿,均为首次确诊哮喘或规范吸入激素停用>3个月后复发及近1个月内无明显感染者。采用流式细胞仪测定患儿外周血中Th17细胞及CD4+CD25+Treg比例的变化。结果 Th17细胞在哮喘急性期组(2.24%±1.02%)较哮喘缓解期组(1.65%±0.38%)及健康儿童组(1.02%±0.28%)均显著增高(P<0.05),哮喘缓解期组(1.65%±0.38%)和健康儿童组(1.02%±0.28%)无明显差别,CD4+CD25+Treg细胞比例在3组儿童间差异均有统计学意义(F=45.604,P<0.05),与健康儿童组(7.11%±0.89%)相比,哮喘缓解期组(6.05%±0.87%)和哮喘急性期组(5.37%±0.80%)的比例明显下降,而哮喘急性期组较健康儿童组下降。哮喘急性期组轻、中、重度3组之间差异同样有统计学意义。Th17细胞与哮喘患儿病情呈正相关(r=0.649,P<0.05),而CD4+CD25+... 相似文献
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Th17是一种新近发现的CD4+T细胞亚群,它是Th1、Th2家族的新成员.近年来研究发现,Th17能够产生IL-17A、IL-17F、IL-21和IL-22等因子,而这些因子在类风湿关节炎、系统性红斑狼疮、系统性硬化病、炎性肠病、自身免疫性心肌炎等自身免疫性疾病的发生发展中起重要作用.因此,加深对Th17在免疫性疾病进展中的认识将为今后的诊断提供新的依据,Th17及其因子也将成为人类治疗自身免疫性疾病的新靶点. 相似文献
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Th17细胞作为独立的CD4+T细胞谱系,分泌一系列特有的免疫调节因子,在各种免疫介导的疾病中发挥重要作用.研究证明,Th17分泌的特征性细胞因子IL-17,参与哮喘等过敏性疾病的诱导,介导其炎症过程.IL-17诱导产生趋化因子IL-8,在严重哮喘的气道中募集中性粒细胞浸润,而且可能对哮喘息者气道腺体的高分泌、气道高反应性及气道重塑起作用.假设Th17细胞过度活化和过敏性气道炎症之间存在密切关联,那么针对Th17细胞的治疗方法将有广阔前景,但其临床应用有待进一步研究. 相似文献