Follicular helper T cells （Tfh） have been referred as a lineage that provides a help for B cells to proliferate and undergo antibody affinity maturation in the germinal center. Evidence has supported that Tfh subset...Follicular helper T cells （Tfh） have been referred as a lineage that provides a help for B cells to proliferate and undergo antibody affinity maturation in the germinal center. Evidence has supported that Tfh subset development, like other lineages, is dependent on microenvironment where a particular transcriptional program is initiated. It has been shown that Bcl-6 and IL-21 act as master regulators for the development and function of Tfh cells. Tfh dysregulation is involved in the development of autoimmune pathologies, such as systemic lupus erythematosus, rheumatoid arthritis and other autoimmune diseases. The present review highlights the recent advances in the field of Tfh cells and focus on their development and function.展开更多
目的:探讨外周血循环滤泡辅助性T细胞(Follicular helper T cells,Tfh)及相关细胞因子IL-21在银屑病患者中的表达水平及其与疾病活动度的关系。方法:收集38例银屑病患者及32例健康对照者,流式细胞术检测外周血循环CD4^+CXCR5^+Tfh和CD4^...目的:探讨外周血循环滤泡辅助性T细胞(Follicular helper T cells,Tfh)及相关细胞因子IL-21在银屑病患者中的表达水平及其与疾病活动度的关系。方法:收集38例银屑病患者及32例健康对照者,流式细胞术检测外周血循环CD4^+CXCR5^+Tfh和CD4^+CXCR5^+ICOS^+Tfh细胞比例以及Th17细胞比例;ELISA检测血清IL-21浓度;分析这些指标间及与银屑病疾病活动度评分PASI间的相关性。结果:与健康对照者相比,银屑病患者外周血循环CD4^+CXCR5^+Tfh和CD4^+CXCR5^+ICOS^+Tfh细胞比例更高,血清IL-21浓度和Th17细胞比例亦显著高于对照组(P<0.05);IL-21浓度与CD4^+CXCR5^+Tfh和CD4^+CXCR5^+ICOS^+Tfh细胞比例均显著正相关,而与Th17细胞比例间无显著相关性(P>0.05);且CD4^+CXCR5^+ICOS^+Tfh细胞比例和血清IL-21与银屑病疾病活动度PASI评分显著正相关,而CD4^+CXCR5^+Tfh则与之无显著相关性(P>0.05)。结论:银屑病患者外周血循环Tfh比例、IL-21浓度上调与银屑病患者疾病活动度密切相关,提示Tfh可能参与银屑病的发生发展过程,这一效应可能是通过分泌高水平IL-21实现;IL-21浓度与Tfh细胞比例相关,而与Th17细胞比例无相关性提示银屑病患者IL-21可能主要由Tfh细胞分泌。展开更多
T follicular helper （Tfh） cells were discovered just over a decade ago as germinal centre T cells that help B cells make antibodies. Included in this role is affinity maturation and isotype switching. It is here tha...T follicular helper （Tfh） cells were discovered just over a decade ago as germinal centre T cells that help B cells make antibodies. Included in this role is affinity maturation and isotype switching. It is here that their functions become less clear. Tfh cells principally produce IL-21 which inhibits class switching to IgE. Recent studies have questioned whether the germinal centre is the main site of IgE class switching or IgE affinity maturation. In this review, I will examine the evidence that these cells are responsible for regulating IgE class switching and the relationship between Tfh cells and T helper 2 （Th2） effector cells.展开更多
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...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。展开更多
基金brue de la Ferollerie, Orleans, France ACKNOWLEDGEMENTS This work was supported in part by grants from the National Institutes of Health ROI AR 059103, Arthritis Foundation Wright Foundation the Outstanding Youth Scientist Investigator Award from National Nature Science Foundation of China （30728007） and the American College of Rheumatology Research and Education＇s Within Our Reach： Finding a Cure for Rheumatoid Arthritis campaign （all to SGZ）, National Nature Science Foundation of China （30972951） （XH） and Le Studium and European FEDER grant support （BR）.
文摘Follicular helper T cells （Tfh） have been referred as a lineage that provides a help for B cells to proliferate and undergo antibody affinity maturation in the germinal center. Evidence has supported that Tfh subset development, like other lineages, is dependent on microenvironment where a particular transcriptional program is initiated. It has been shown that Bcl-6 and IL-21 act as master regulators for the development and function of Tfh cells. Tfh dysregulation is involved in the development of autoimmune pathologies, such as systemic lupus erythematosus, rheumatoid arthritis and other autoimmune diseases. The present review highlights the recent advances in the field of Tfh cells and focus on their development and function.
文摘目的:探讨外周血循环滤泡辅助性T细胞(Follicular helper T cells,Tfh)及相关细胞因子IL-21在银屑病患者中的表达水平及其与疾病活动度的关系。方法:收集38例银屑病患者及32例健康对照者,流式细胞术检测外周血循环CD4^+CXCR5^+Tfh和CD4^+CXCR5^+ICOS^+Tfh细胞比例以及Th17细胞比例;ELISA检测血清IL-21浓度;分析这些指标间及与银屑病疾病活动度评分PASI间的相关性。结果:与健康对照者相比,银屑病患者外周血循环CD4^+CXCR5^+Tfh和CD4^+CXCR5^+ICOS^+Tfh细胞比例更高,血清IL-21浓度和Th17细胞比例亦显著高于对照组(P<0.05);IL-21浓度与CD4^+CXCR5^+Tfh和CD4^+CXCR5^+ICOS^+Tfh细胞比例均显著正相关,而与Th17细胞比例间无显著相关性(P>0.05);且CD4^+CXCR5^+ICOS^+Tfh细胞比例和血清IL-21与银屑病疾病活动度PASI评分显著正相关,而CD4^+CXCR5^+Tfh则与之无显著相关性(P>0.05)。结论:银屑病患者外周血循环Tfh比例、IL-21浓度上调与银屑病患者疾病活动度密切相关,提示Tfh可能参与银屑病的发生发展过程,这一效应可能是通过分泌高水平IL-21实现;IL-21浓度与Tfh细胞比例相关,而与Th17细胞比例无相关性提示银屑病患者IL-21可能主要由Tfh细胞分泌。
文摘T follicular helper （Tfh） cells were discovered just over a decade ago as germinal centre T cells that help B cells make antibodies. Included in this role is affinity maturation and isotype switching. It is here that their functions become less clear. Tfh cells principally produce IL-21 which inhibits class switching to IgE. Recent studies have questioned whether the germinal centre is the main site of IgE class switching or IgE affinity maturation. In this review, I will examine the evidence that these cells are responsible for regulating IgE class switching and the relationship between Tfh cells and T helper 2 （Th2） effector cells.
文摘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。
