目的以雌性和雄性非肥胖糖尿病(nonobese diabetic,NOD)小鼠以及健康对照癌症研究所(institute for cancer research,ICR)小鼠为研究对象,比较分析初始、效应、记忆、耗竭以及调节性CD8^(+)T细胞分化亚群差异,探讨1型糖尿病(type 1 diab...目的以雌性和雄性非肥胖糖尿病(nonobese diabetic,NOD)小鼠以及健康对照癌症研究所(institute for cancer research,ICR)小鼠为研究对象,比较分析初始、效应、记忆、耗竭以及调节性CD8^(+)T细胞分化亚群差异,探讨1型糖尿病(type 1 diabetes,T1D)背景下的性别因素对CD8^(+)T细胞分化命运的影响。方法采用流式细胞术检测雌雄NOD小鼠脾脏、胰腺引流淋巴结(pancreatic draining lymph nodes,pLN)、胰腺浸润淋巴细胞(pancreas-infiltrating lymphocytes,PIL)、初始T细胞(naive T cells,T_(N))、中枢记忆T细胞(central memory T cells,T_(CM))、效应T细胞(effector T cells,T_(EFF))、效应前体样T细胞(effector precursor T cells,T_(EP))、耗竭T细胞(exhausted T cells,T_(EX))、耗竭前体T细胞(precursor exhausted T cells,T_(PEX))以及调节性T细胞(regulatory T cells,Tregs)等CD8^(+)T细胞分化亚群的频率和表型差异。结果与雄性NOD小鼠比较,雌性NOD小鼠pLN及PIL中IFN-γ^(+)、CD107a^(+)和CCL5^(+)CD8^(+)T_(EFF)频率显著升高(P<0.01,P<0.05,P<0.05),同时脾脏中CD8^(+)T_(N)、CD8^(+)T_(CM)、CD8^(+)T_(EX)、CD8^(+)T_(PEX)和CD122^(+)CD8^(+)Tregs亚群的频率均显著降低(P<0.01,P<0.01,P<0.01,P<0.01,P<0.001);而雌性和雄性ICR小鼠体内除CD122^(+)CD8^(+)Tregs差异变化与NOD小鼠一致(P<0.05),其余上述各CD8^(+)T细胞分化亚群无显著差异。结论雄激素可能通过抑制记忆T细胞向效应T细胞分化,同时促进效应T细胞功能耗竭,导致雌雄发病率差异。展开更多
When hematopoietic stem and progenitor cells(HSPC)are harvested for transplantation, either from the bone marrow or from mobilized blood, the graft contains a significant number of T cells. It is these T cells that ar...When hematopoietic stem and progenitor cells(HSPC)are harvested for transplantation, either from the bone marrow or from mobilized blood, the graft contains a significant number of T cells. It is these T cells that are the major drivers of graft-vs-host disease(Gv HD). The risk for Gv HD can simply be reduced by the removal of these T cells from the graft. However, this is not always desirable, as this procedure also decreases the engraftment of the transplanted HSPCs and, if applicable, a graft-vs-tumor effect. This poses an important conundrum in the field: T cells act as a double-edged sword upon allogeneic HSPC transplantation, as they support engraftment of HSPCs and provide anti-tumor activity, but can also cause Gv HD. It has recently been suggested that T cells also enhance the engraftment of autologous HSPCs, thus supporting the notion that T cells and HSPCs have an important functional interaction that is highly beneficial, in particular during transplantation. The underlying reason on why and how T cells contribute to HSPC engraftment is still poorly understood. Therefore, we evaluate in this review the studies that have examined the role of T cells during HSPC transplantation and the possible mechanisms involved in their supporting function. Understanding the underlying cellular and molecular mechanisms can provide new insight into improving HSPC engraftment and thus lower the number of HSPCs required during transplantation. Moreover, it could provide new avenues to limit the development of severe Gv HD, thus making HSPC transplantations more efficient and ultimately safer.展开更多
目的:探讨外周T细胞淋巴瘤(Peripheral T cell lymphoma,PTCL)患者记忆T细胞(CD45RO+T)以及初始T细胞(CD45RA+T)在外周血中的不同分布特点的临床意义。方法:选取我院2010年2月~2014年2月收治的27例PTCL患者,以同期30例健康体检者作为对...目的:探讨外周T细胞淋巴瘤(Peripheral T cell lymphoma,PTCL)患者记忆T细胞(CD45RO+T)以及初始T细胞(CD45RA+T)在外周血中的不同分布特点的临床意义。方法:选取我院2010年2月~2014年2月收治的27例PTCL患者,以同期30例健康体检者作为对照,通过比较PTCL患者与健康受试者外周血中CD45RO+T、CD45RA+T的分布差异,分析不同临床分期的PTCL患者外周血中上述指标的差异。结果:PTCL患者的淋巴结中T细胞抗原呈多样性表达,以CD4+为主要免疫表型,无B细胞相关抗原表达;患者组外周血CD4+/CD8+、CD4+CD45RO+T显著低于正常组(P<0.05),CD4+CD45RA+T、CD8+CD45RA+T、CD8+CD45RO+T显著高于正常组(P<0.05);I/II期PTCL患者外周血CD4+/CD8+、CD4+CD45RO+T显著高于III/IV期患者(P<0.05),CD4+CD45RA+T、CD8+CD45RA+T、CD8+CD45RO+T显著低于III/IV期患者(P<0.05)。结论:CD45RO+T和CD45RA+T在PTCL患者中存在明显的分布差异,针对其不同分布情况制定相应PTCL的处理方案,可提高PTCL的确诊率,改善患者的预后。展开更多
文摘目的以雌性和雄性非肥胖糖尿病(nonobese diabetic,NOD)小鼠以及健康对照癌症研究所(institute for cancer research,ICR)小鼠为研究对象,比较分析初始、效应、记忆、耗竭以及调节性CD8^(+)T细胞分化亚群差异,探讨1型糖尿病(type 1 diabetes,T1D)背景下的性别因素对CD8^(+)T细胞分化命运的影响。方法采用流式细胞术检测雌雄NOD小鼠脾脏、胰腺引流淋巴结(pancreatic draining lymph nodes,pLN)、胰腺浸润淋巴细胞(pancreas-infiltrating lymphocytes,PIL)、初始T细胞(naive T cells,T_(N))、中枢记忆T细胞(central memory T cells,T_(CM))、效应T细胞(effector T cells,T_(EFF))、效应前体样T细胞(effector precursor T cells,T_(EP))、耗竭T细胞(exhausted T cells,T_(EX))、耗竭前体T细胞(precursor exhausted T cells,T_(PEX))以及调节性T细胞(regulatory T cells,Tregs)等CD8^(+)T细胞分化亚群的频率和表型差异。结果与雄性NOD小鼠比较,雌性NOD小鼠pLN及PIL中IFN-γ^(+)、CD107a^(+)和CCL5^(+)CD8^(+)T_(EFF)频率显著升高(P<0.01,P<0.05,P<0.05),同时脾脏中CD8^(+)T_(N)、CD8^(+)T_(CM)、CD8^(+)T_(EX)、CD8^(+)T_(PEX)和CD122^(+)CD8^(+)Tregs亚群的频率均显著降低(P<0.01,P<0.01,P<0.01,P<0.01,P<0.001);而雌性和雄性ICR小鼠体内除CD122^(+)CD8^(+)Tregs差异变化与NOD小鼠一致(P<0.05),其余上述各CD8^(+)T细胞分化亚群无显著差异。结论雄激素可能通过抑制记忆T细胞向效应T细胞分化,同时促进效应T细胞功能耗竭,导致雌雄发病率差异。
基金Supported by a fellowship obt-ained by Nolt-e MA from t-he Landst-einer Foundat-ion for Blood Transfusion Research(www.lsbr.nl),No.#1014
文摘When hematopoietic stem and progenitor cells(HSPC)are harvested for transplantation, either from the bone marrow or from mobilized blood, the graft contains a significant number of T cells. It is these T cells that are the major drivers of graft-vs-host disease(Gv HD). The risk for Gv HD can simply be reduced by the removal of these T cells from the graft. However, this is not always desirable, as this procedure also decreases the engraftment of the transplanted HSPCs and, if applicable, a graft-vs-tumor effect. This poses an important conundrum in the field: T cells act as a double-edged sword upon allogeneic HSPC transplantation, as they support engraftment of HSPCs and provide anti-tumor activity, but can also cause Gv HD. It has recently been suggested that T cells also enhance the engraftment of autologous HSPCs, thus supporting the notion that T cells and HSPCs have an important functional interaction that is highly beneficial, in particular during transplantation. The underlying reason on why and how T cells contribute to HSPC engraftment is still poorly understood. Therefore, we evaluate in this review the studies that have examined the role of T cells during HSPC transplantation and the possible mechanisms involved in their supporting function. Understanding the underlying cellular and molecular mechanisms can provide new insight into improving HSPC engraftment and thus lower the number of HSPCs required during transplantation. Moreover, it could provide new avenues to limit the development of severe Gv HD, thus making HSPC transplantations more efficient and ultimately safer.
文摘目的:探讨外周T细胞淋巴瘤(Peripheral T cell lymphoma,PTCL)患者记忆T细胞(CD45RO+T)以及初始T细胞(CD45RA+T)在外周血中的不同分布特点的临床意义。方法:选取我院2010年2月~2014年2月收治的27例PTCL患者,以同期30例健康体检者作为对照,通过比较PTCL患者与健康受试者外周血中CD45RO+T、CD45RA+T的分布差异,分析不同临床分期的PTCL患者外周血中上述指标的差异。结果:PTCL患者的淋巴结中T细胞抗原呈多样性表达,以CD4+为主要免疫表型,无B细胞相关抗原表达;患者组外周血CD4+/CD8+、CD4+CD45RO+T显著低于正常组(P<0.05),CD4+CD45RA+T、CD8+CD45RA+T、CD8+CD45RO+T显著高于正常组(P<0.05);I/II期PTCL患者外周血CD4+/CD8+、CD4+CD45RO+T显著高于III/IV期患者(P<0.05),CD4+CD45RA+T、CD8+CD45RA+T、CD8+CD45RO+T显著低于III/IV期患者(P<0.05)。结论:CD45RO+T和CD45RA+T在PTCL患者中存在明显的分布差异,针对其不同分布情况制定相应PTCL的处理方案,可提高PTCL的确诊率,改善患者的预后。
