Kang et al.published a research article on the treatment of ischemic stroke using engineered Treg cells(Kang et al.,Prog Biochem Biophys,2025,52(4):946-956.DOI:10.16476/j.pibb.2025.0019).Their study mainly explores th...Kang et al.published a research article on the treatment of ischemic stroke using engineered Treg cells(Kang et al.,Prog Biochem Biophys,2025,52(4):946-956.DOI:10.16476/j.pibb.2025.0019).Their study mainly explores the immunoregulatory role of regulatory T(Treg)cells in ischemic stroke,providing an innovative therapeutic strategy.Neuroinflammation is a major driver of secondary injury after stroke.Existing treatments focus on vascular recanalization while neglecting immune regulation.Their study proposes to modulate neuroinflammation through in vitro-induced Treg cells,offering a novel approach distinct from traditional thrombolysis and endovascular interventions.展开更多
AIM:Regulatory T cells(Tregs)are a specialized subset of CD4^(+)T cells primarily involved in im⁃munosuppressive functions.AMP-activated protein kinase(AMPK)serves as a metabolic sensor that governs the differen⁃tiati...AIM:Regulatory T cells(Tregs)are a specialized subset of CD4^(+)T cells primarily involved in im⁃munosuppressive functions.AMP-activated protein kinase(AMPK)serves as a metabolic sensor that governs the differen⁃tiation,maturation,and immune functions of Tregs through metabolic reprogramming.However,the impact of AMPKα1(the catalytic subunit of AMPK)knockout specifically in Tregs on the host's immune microenvironment remains largely un⁃explored.METHODS:Histological changes in immune organs were assessed using HE staining.The types of immune cells and their relative population percentages in immune organs and blood were quantified through flow cytometry in both AMPKα1flox/flox(AMPKα1^(fl/fl))mice and Treg-specific AMPKα1 knockout mice(AMPKα1^(fl/fl)Foxp3^(cre)mice).RESULTS:Compared to AMPKα1^(fl/fl)mice,the percentage of eosinophils in the bone marrow of AMPKα1^(fl/fl)Foxp3^(cre)mice was significant⁃ly reduced.Additionally,while the thymus of AMPKα1^(fl/fl)Foxp3^(cre)mice exhibited normal structure,both its size and the ratio of thymus weight to body weight were significantly decreased.The knockout of AMPKα1 in Tregs led to a notable reduction in the total percentage of immature double-negative(DN)cells.Consequently,the percentage of CD4^(+)T cells derived from these DN cells also decreased,even though the percentages of DN1 and DN4 cells were higher in the thymus of AMPKα1^(fl/fl)Foxp3^(cre)mice compared to AMPKα1^(fl/fl)mice.Importantly,the proportion of Siglec-F+CD11b^(+)eosinophils in the thymus was significantly lower in AMPKα1^(fl/fl)Foxp3^(cre)mice.Knockout of AMPKα1 in Tregs resulted in a marked increase in the percentage of CD4^(+)T cells in peripheral blood,alongside a decrease in the proportion of mature CD8^(+)T cells.Similarly,the proportion of CD4^(+)T cells in the spleen of AMPKα1^(fl/fl)Foxp3^(cre)mice was elevated compared to AMPKα1^(fl/fl)mice.In contrast,the proportion of neutrophils significantly decreased,while mononuclear cell proportions increased in the spleen of AMPKα1^(fl/fl)Foxp3^(cre)mice.In lymph nodes,the medullary boundaries in AMPKα1^(fl/fl)Foxp3^(cre)mice were blurred,and the lymphoid follicles were missing,a feature not observed in AMPKα1^(fl/fl)mice.Furthermore,the knockout of AMPKα1 in Tregs reduced the CD3^(+)T cell population,particularly the CD8^(+)T cell population,in lymph nodes.Although the mature Treg cell population was significantly lower in AMPKα1^(fl/fl)Foxp3^(cre)mice,the percentage of CD4^(+)T cells was markedly in⁃creased.In contrast,there was no statistically significant difference in granulocyte populations between AMPKα1^(fl/fl)Foxp3^(cre)and AMPKα1^(fl/fl)mice.CONCLUSION:The populations of mature Tregs,CD8^(+)T cells and eosinophils in various im⁃mune organs were significantly altered in mice with Treg-specific AMPKα1 knockout,suggesting a potential remodeling of the host immune microenvironment in response to inflammatory stimuli.展开更多
OBJECTIVE Experimental autoimmune encephalomyelitis(EAE),the classical animal model for multiple sclerosis(MS)is triggered by an impaired balance of T helper(Th)cells and regulatory T(Tregs)cells.Matrine(MAT),a quinol...OBJECTIVE Experimental autoimmune encephalomyelitis(EAE),the classical animal model for multiple sclerosis(MS)is triggered by an impaired balance of T helper(Th)cells and regulatory T(Tregs)cells.Matrine(MAT),a quinolizidine alkaloid derived from the herb Radix Sophorae Flave,has been shown to ameliorate the clinical signs,inflammatory infiltration,demyelination in acute EAE rats.However,whether MAT protect from EAE by adjusting Th and Treg cells response in specific-cellular and molecular level is unknown.METHODS Herein,MAT was tested for its effects on Th1,Th2,Th17 and Treg cells in the spinal cord of EAE mice and splenocyte-extracted from EAE mice with MOG35-55-restimulated,respectively.RESULTS Our findings revealed that MAT significantly inhibit the proliferation of splenocyte,and remarkably down-regulate the differentiation of Th1/Th17 cells with decreased expressions of CD4+IFN-γ+cells and CD4+IL-17+cells in vivo and IL-17,IFN-γ,ROR-γt,T-bet in vitro,meanwhile it dramatically up-regulate the Th2/Treg cells response associated with increased levels of CD4+TGF-β+1cells and CD4+IL-10+cells in vivo and IL-4,IL-10,TGF-β1,Foxp3 and GATA3in vitro.CONCLUSION Considering the effective therapeutic effects of MAT on EAE,it′s worth to find its new values on other autoimmune diseases.展开更多
目的:研究弥漫大B细胞淋巴瘤(DLBCL)患者初诊时外周血中调节性T细胞(Treg)水平及其对疗效评估和预后判断的价值。方法:选取2018年1月至2022年2月安徽医科大学第二附属医院收治的72例初诊DLBCL患者作为研究对象,以17例健康志愿者为对照,...目的:研究弥漫大B细胞淋巴瘤(DLBCL)患者初诊时外周血中调节性T细胞(Treg)水平及其对疗效评估和预后判断的价值。方法:选取2018年1月至2022年2月安徽医科大学第二附属医院收治的72例初诊DLBCL患者作为研究对象,以17例健康志愿者为对照,使用流式细胞术检测所有纳入研究对象的外周血中CD4^(+)CD25^(+)CD127^(low)Treg水平,并结合患者的临床特征进行比较分析。结果:患者治疗前外周血Treg百分比与Ann Arbor分期、IPI评分、ECOG评分、血红蛋白(HB)相关;初诊时外周血Treg水平显著低于健康对照(3.85±0.22 vs 5.15±0.31,P=0.007);根据初诊时外周血CD4^(+)CD25^(+)CD127^(low)Treg占CD4^(+)T细胞百分比的中位数将DLBCL患者分为高Treg组和低Treg组,低Treg组患者的治疗总有效率明显低于高Treg组(P=0.035);ECOG评分(P=0.040)和治疗前低Treg(P=0.014)是影响DLBCL患者无进展生存期(PFS)的独立危险因素;有B症状(P=0.028)、ECOG评分≥2分(P=0.041)和治疗前低Treg(P=0.036)是影响患者OS的独立危险因素;低Treg组PFS(P=0.020)和OS(P=0.036)均显著低于高Treg组。结论:初诊DLBCL患者外周血CD4^(+)CD25^(+)CD127^(low)Treg百分比低提示预后不良。展开更多
调节性T细胞(regulatory T cells,Tregs)作为免疫系统的关键调节者,在肿瘤的发生和发展过程中发挥重要作用,可通过免疫检查点通路、分泌抑制性细胞因子以及特异性趋化因子等多种方式发挥免疫抑制作用,促进肿瘤细胞的免疫逃逸,但其作用...调节性T细胞(regulatory T cells,Tregs)作为免疫系统的关键调节者,在肿瘤的发生和发展过程中发挥重要作用,可通过免疫检查点通路、分泌抑制性细胞因子以及特异性趋化因子等多种方式发挥免疫抑制作用,促进肿瘤细胞的免疫逃逸,但其作用机制复杂,涉及多阶段和多因素过程。本文总结了Tregs在肿瘤中发挥免疫抑制功能和促进肿瘤免疫逃逸的机制,阐述了相关研究进展,旨在为深入理解肿瘤的免疫调控机制及开发新的治疗策略提供参考。展开更多
文摘Kang et al.published a research article on the treatment of ischemic stroke using engineered Treg cells(Kang et al.,Prog Biochem Biophys,2025,52(4):946-956.DOI:10.16476/j.pibb.2025.0019).Their study mainly explores the immunoregulatory role of regulatory T(Treg)cells in ischemic stroke,providing an innovative therapeutic strategy.Neuroinflammation is a major driver of secondary injury after stroke.Existing treatments focus on vascular recanalization while neglecting immune regulation.Their study proposes to modulate neuroinflammation through in vitro-induced Treg cells,offering a novel approach distinct from traditional thrombolysis and endovascular interventions.
基金Supported by the National Natural Science Foundation of China(No.81800423)the Guangdong Medical Science and Technology Research project(No.B2022102)。
文摘AIM:Regulatory T cells(Tregs)are a specialized subset of CD4^(+)T cells primarily involved in im⁃munosuppressive functions.AMP-activated protein kinase(AMPK)serves as a metabolic sensor that governs the differen⁃tiation,maturation,and immune functions of Tregs through metabolic reprogramming.However,the impact of AMPKα1(the catalytic subunit of AMPK)knockout specifically in Tregs on the host's immune microenvironment remains largely un⁃explored.METHODS:Histological changes in immune organs were assessed using HE staining.The types of immune cells and their relative population percentages in immune organs and blood were quantified through flow cytometry in both AMPKα1flox/flox(AMPKα1^(fl/fl))mice and Treg-specific AMPKα1 knockout mice(AMPKα1^(fl/fl)Foxp3^(cre)mice).RESULTS:Compared to AMPKα1^(fl/fl)mice,the percentage of eosinophils in the bone marrow of AMPKα1^(fl/fl)Foxp3^(cre)mice was significant⁃ly reduced.Additionally,while the thymus of AMPKα1^(fl/fl)Foxp3^(cre)mice exhibited normal structure,both its size and the ratio of thymus weight to body weight were significantly decreased.The knockout of AMPKα1 in Tregs led to a notable reduction in the total percentage of immature double-negative(DN)cells.Consequently,the percentage of CD4^(+)T cells derived from these DN cells also decreased,even though the percentages of DN1 and DN4 cells were higher in the thymus of AMPKα1^(fl/fl)Foxp3^(cre)mice compared to AMPKα1^(fl/fl)mice.Importantly,the proportion of Siglec-F+CD11b^(+)eosinophils in the thymus was significantly lower in AMPKα1^(fl/fl)Foxp3^(cre)mice.Knockout of AMPKα1 in Tregs resulted in a marked increase in the percentage of CD4^(+)T cells in peripheral blood,alongside a decrease in the proportion of mature CD8^(+)T cells.Similarly,the proportion of CD4^(+)T cells in the spleen of AMPKα1^(fl/fl)Foxp3^(cre)mice was elevated compared to AMPKα1^(fl/fl)mice.In contrast,the proportion of neutrophils significantly decreased,while mononuclear cell proportions increased in the spleen of AMPKα1^(fl/fl)Foxp3^(cre)mice.In lymph nodes,the medullary boundaries in AMPKα1^(fl/fl)Foxp3^(cre)mice were blurred,and the lymphoid follicles were missing,a feature not observed in AMPKα1^(fl/fl)mice.Furthermore,the knockout of AMPKα1 in Tregs reduced the CD3^(+)T cell population,particularly the CD8^(+)T cell population,in lymph nodes.Although the mature Treg cell population was significantly lower in AMPKα1^(fl/fl)Foxp3^(cre)mice,the percentage of CD4^(+)T cells was markedly in⁃creased.In contrast,there was no statistically significant difference in granulocyte populations between AMPKα1^(fl/fl)Foxp3^(cre)and AMPKα1^(fl/fl)mice.CONCLUSION:The populations of mature Tregs,CD8^(+)T cells and eosinophils in various im⁃mune organs were significantly altered in mice with Treg-specific AMPKα1 knockout,suggesting a potential remodeling of the host immune microenvironment in response to inflammatory stimuli.
基金The project supported by National Natural Science Foundation of China(31570357)
文摘OBJECTIVE Experimental autoimmune encephalomyelitis(EAE),the classical animal model for multiple sclerosis(MS)is triggered by an impaired balance of T helper(Th)cells and regulatory T(Tregs)cells.Matrine(MAT),a quinolizidine alkaloid derived from the herb Radix Sophorae Flave,has been shown to ameliorate the clinical signs,inflammatory infiltration,demyelination in acute EAE rats.However,whether MAT protect from EAE by adjusting Th and Treg cells response in specific-cellular and molecular level is unknown.METHODS Herein,MAT was tested for its effects on Th1,Th2,Th17 and Treg cells in the spinal cord of EAE mice and splenocyte-extracted from EAE mice with MOG35-55-restimulated,respectively.RESULTS Our findings revealed that MAT significantly inhibit the proliferation of splenocyte,and remarkably down-regulate the differentiation of Th1/Th17 cells with decreased expressions of CD4+IFN-γ+cells and CD4+IL-17+cells in vivo and IL-17,IFN-γ,ROR-γt,T-bet in vitro,meanwhile it dramatically up-regulate the Th2/Treg cells response associated with increased levels of CD4+TGF-β+1cells and CD4+IL-10+cells in vivo and IL-4,IL-10,TGF-β1,Foxp3 and GATA3in vitro.CONCLUSION Considering the effective therapeutic effects of MAT on EAE,it′s worth to find its new values on other autoimmune diseases.
文摘目的:研究弥漫大B细胞淋巴瘤(DLBCL)患者初诊时外周血中调节性T细胞(Treg)水平及其对疗效评估和预后判断的价值。方法:选取2018年1月至2022年2月安徽医科大学第二附属医院收治的72例初诊DLBCL患者作为研究对象,以17例健康志愿者为对照,使用流式细胞术检测所有纳入研究对象的外周血中CD4^(+)CD25^(+)CD127^(low)Treg水平,并结合患者的临床特征进行比较分析。结果:患者治疗前外周血Treg百分比与Ann Arbor分期、IPI评分、ECOG评分、血红蛋白(HB)相关;初诊时外周血Treg水平显著低于健康对照(3.85±0.22 vs 5.15±0.31,P=0.007);根据初诊时外周血CD4^(+)CD25^(+)CD127^(low)Treg占CD4^(+)T细胞百分比的中位数将DLBCL患者分为高Treg组和低Treg组,低Treg组患者的治疗总有效率明显低于高Treg组(P=0.035);ECOG评分(P=0.040)和治疗前低Treg(P=0.014)是影响DLBCL患者无进展生存期(PFS)的独立危险因素;有B症状(P=0.028)、ECOG评分≥2分(P=0.041)和治疗前低Treg(P=0.036)是影响患者OS的独立危险因素;低Treg组PFS(P=0.020)和OS(P=0.036)均显著低于高Treg组。结论:初诊DLBCL患者外周血CD4^(+)CD25^(+)CD127^(low)Treg百分比低提示预后不良。
文摘调节性T细胞(regulatory T cells,Tregs)作为免疫系统的关键调节者,在肿瘤的发生和发展过程中发挥重要作用,可通过免疫检查点通路、分泌抑制性细胞因子以及特异性趋化因子等多种方式发挥免疫抑制作用,促进肿瘤细胞的免疫逃逸,但其作用机制复杂,涉及多阶段和多因素过程。本文总结了Tregs在肿瘤中发挥免疫抑制功能和促进肿瘤免疫逃逸的机制,阐述了相关研究进展,旨在为深入理解肿瘤的免疫调控机制及开发新的治疗策略提供参考。
