BACKGROUND:Human CD8 + CD28 - T-suppressor(Ts) cells have been considered to indicate a reduced need for immunosuppression in pediatric liver-intestine transplant recipients and recipients of deceased heart-kidney tra...BACKGROUND:Human CD8 + CD28 - T-suppressor(Ts) cells have been considered to indicate a reduced need for immunosuppression in pediatric liver-intestine transplant recipients and recipients of deceased heart-kidney transplants.However,in adult-to-adult living donor liver transplantation(A-A LDLT)little information is available and the clinical significance is still unknown. METHODS:Flow cytometry was used to detect the population of CD8+CD28 -Ts cells present in peripheral blood in A-A LDLT recipients(n=31),patients with end- stage liver disease(n=24)and healthy controls(n=19). Meanwhile,we tested the graft function and trough levels of immunosuppression in recipients.The clinical and follow- up data of 31 transplant recipients were analyzed. RESULTS:Compared with diseased controls(P=0.007) and healthy individuals(P=0.000),a notable expansion of CD8 + CD28 - Ts cells was found in recipients of A-A LDLT.This was associated with graft function,levels of immunosuppression and rejection episodes. CONCLUSIONS:To monitor the CD8 + CD28 - Ts cells levels is important to evaluate the immune state of recipients. Meanwhile,it is also important to promote expansion of CD8+CD28 -Ts cells in recipients of A-A LDLT,not only to sustain good graft function and decrease the dosage of immunosuppressants,but also to reduce the occurrence of rejection.展开更多
Objective: To study the influence of T suppressor cell activity on habitual abortion (HA) and to observe the regulatory effect of Yangxue Antai Granule (YXATG) on T suppressor cell and its effect on fetus preservati...Objective: To study the influence of T suppressor cell activity on habitual abortion (HA) and to observe the regulatory effect of Yangxue Antai Granule (YXATG) on T suppressor cell and its effect on fetus preservation. Methods: T suppressor cell activities of 56 pregnant women with HA history were tested with method of short life T suppressor cell activity (MTT method) during early pregnancy, and were followed up in middle and late pregnancy in 20 cases of them. All the 56 patients received YXATG treatment. Groups of normal early pregnant, normal non pregnant women and those non pregnant but with history of habitual abortion were involved in this study as control. Results: T suppressor cell activity in early pregnancy was lower than that of middle and late pregnancy ( P <0.01, P <0.001) and also lower than that of the control groups ( P <0.01, P <0.001). The successful rate of fetus preservation of YXATG was 98.2%, and 98.0% of the cases got normal delivery. Conclusion: Low T suppressor cell activity might be the immunologic etiology of HA. The fetus preservative effect of YXATG might be due to its regulatory effect on T suppressor cell activity.展开更多
目的分析T细胞活化免疫球蛋白抑制V型结构域(V-domain Ig suppressor of T cell activation,VISTA)在幼年特发性关节炎(juvenile idiopathic arthritis,JIA)患儿外周血的表达情况,探讨其在发病中的作用。方法前瞻性收集不同亚型JIA患儿...目的分析T细胞活化免疫球蛋白抑制V型结构域(V-domain Ig suppressor of T cell activation,VISTA)在幼年特发性关节炎(juvenile idiopathic arthritis,JIA)患儿外周血的表达情况,探讨其在发病中的作用。方法前瞻性收集不同亚型JIA患儿(47例)及健康儿童(10例)的外周血,利用流式细胞术检测CD14+单核细胞、CD4+T淋巴细胞、CD8+T淋巴细胞上VISTA、干扰素-γ(interfern-γ,IFN-γ)、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)的表达情况。结果VISTA在JIA患儿中的表达水平比健康儿童低(P<0.05);不同亚型JIA患儿VISTA表达差异有统计学意义,以全身型表达水平最低(P<0.05);不同免疫细胞表达VISTA差异有统计学意义,单核细胞表面VISTA表达水平更高(P<0.05)。相关性分析发现CD4+T细胞上VISTA与IFN-γ(r=-0.436,P<0.05)、TNF-α(r=-0.382,P<0.05)表达呈负相关,CD8+T细胞上VISTA与IFN-γ(r=-0.348,P<0.05)、TNF-α(r=-0.487,P<0.05)表达呈负相关;CD14+单核细胞上VISTA与IFN-γ(r=-0.582,P<0.05)、TNF-α(r=-0.603,P<0.05)表达呈负相关。结论VISTA表达不足可能与JIA发病相关,增强VISTA的免疫调节作用可能是未来治疗JIA的途径之一。展开更多
目的:基于小鼠渐进衰老模型探讨衰老所致“正虚”的免疫功能衰退表征的特点。方法:使用不同月龄(2、6、15月龄)C57BL/6小鼠,通过流式细胞术检测并比较小鼠外周血和脾组织中T细胞、髓源性抑制细胞(MDSC)及其亚群的丰度变化。结果:外周血...目的:基于小鼠渐进衰老模型探讨衰老所致“正虚”的免疫功能衰退表征的特点。方法:使用不同月龄(2、6、15月龄)C57BL/6小鼠,通过流式细胞术检测并比较小鼠外周血和脾组织中T细胞、髓源性抑制细胞(MDSC)及其亚群的丰度变化。结果:外周血中T细胞亚群表型为CD3^(+)CD4^(+)CD44-CD62L^(+)的幼稚CD4^(+)T细胞(2 vs 6月龄,P=0.137;2 vs 15月龄,P=0.004;6 vs15月龄,P=0.105)和表型为CD3^(+)CD8^(+)CD44-CD62L^(+)的幼稚CD8^(+)T细胞(2 vs 6月龄,P=0.179;2 vs 15月龄,P=0.001;6 vs15月龄,P=0.015)出现与衰老有关的细胞比例降低,差异具有统计学意义。表型为CD3^(+)CD4^(+)CD44^(+)CD62L^(+)的中央记忆CD8^(+)T细胞出现与衰老有关的比例升高,差异具有统计学意义(2 vs 6月龄,P=0.01;2 vs 15月龄,P=0.007;6 vs 15月龄,P=0.164)。对脾组织的检测结果具有与外周血相同特点。同时,CD8^(+)T细胞比例随衰老逐渐升高(2 vs 6月龄,P=0.027;2 vs 15月龄,P<0.001;6 vs15月龄,P<0.001);表型为CD8^(+)CD28^(+)的活化CD8^(+)T细胞亚群比例也出现随月龄增长的上升(2 vs 6月龄,P=0.863;2 vs 15月龄,P=0.016;6 vs 15月龄,P=0.024),差异均具有统计学意义。结论:衰老所致“正虚”过程中,不同免疫细胞亚群变化并不都反映免疫抑制特点,虽然总体免疫功能下降,但单一表型难以反应整体免疫功能变化。展开更多
异基因骨髓移植(Allogeneic Bone Marrow Transplantation,ABMT)后,受体的免疫功能长期缺损,是患者术后极易感染死亡的重要原因之一.本文对ABMT小鼠(C57BL/6→BALB/c)免疫功能缺损的机制进行了探讨,发现ABMT小鼠IL-2产生明显受损;其脾...异基因骨髓移植(Allogeneic Bone Marrow Transplantation,ABMT)后,受体的免疫功能长期缺损,是患者术后极易感染死亡的重要原因之一.本文对ABMT小鼠(C57BL/6→BALB/c)免疫功能缺损的机制进行了探讨,发现ABMT小鼠IL-2产生明显受损;其脾细胞与(C57BL/6小鼠脾细胞一起过继转移到致死量照射的BALB/C小鼠体内,能抑制移植物抗宿主病(GVHD)的发生.去除其脾T细胞后,这种抑制作用丧失,ABMT小鼠脾细胞上清中发现一种非特异的抑制因子,能抑制正常小鼠脾细胞产生混合淋巴细胞反应的能力;能抑制正常小鼠的脾细胞产生IL-2;抑制正常小鼠脾细胞毒T淋巴细胞(CTL)的杀伤活性.用抗Thy-1.2单抗和补体去除ABMT小鼠脾T细胞后,其脾细胞培养上(?)的上述抑制活性丧失.这说明ABMT小鼠脾T(?)细胞活性增强是其免疫功能缺损的重要原因之一,它通过释放非特异的抑制因子执行其免疫抑制功能.展开更多
基金supported by grants from the National Natural Science Foundation of China(No.30772124)the Doctoral Fund of the Ministry of Education of China(No.20070610147).
文摘BACKGROUND:Human CD8 + CD28 - T-suppressor(Ts) cells have been considered to indicate a reduced need for immunosuppression in pediatric liver-intestine transplant recipients and recipients of deceased heart-kidney transplants.However,in adult-to-adult living donor liver transplantation(A-A LDLT)little information is available and the clinical significance is still unknown. METHODS:Flow cytometry was used to detect the population of CD8+CD28 -Ts cells present in peripheral blood in A-A LDLT recipients(n=31),patients with end- stage liver disease(n=24)and healthy controls(n=19). Meanwhile,we tested the graft function and trough levels of immunosuppression in recipients.The clinical and follow- up data of 31 transplant recipients were analyzed. RESULTS:Compared with diseased controls(P=0.007) and healthy individuals(P=0.000),a notable expansion of CD8 + CD28 - Ts cells was found in recipients of A-A LDLT.This was associated with graft function,levels of immunosuppression and rejection episodes. CONCLUSIONS:To monitor the CD8 + CD28 - Ts cells levels is important to evaluate the immune state of recipients. Meanwhile,it is also important to promote expansion of CD8+CD28 -Ts cells in recipients of A-A LDLT,not only to sustain good graft function and decrease the dosage of immunosuppressants,but also to reduce the occurrence of rejection.
文摘Objective: To study the influence of T suppressor cell activity on habitual abortion (HA) and to observe the regulatory effect of Yangxue Antai Granule (YXATG) on T suppressor cell and its effect on fetus preservation. Methods: T suppressor cell activities of 56 pregnant women with HA history were tested with method of short life T suppressor cell activity (MTT method) during early pregnancy, and were followed up in middle and late pregnancy in 20 cases of them. All the 56 patients received YXATG treatment. Groups of normal early pregnant, normal non pregnant women and those non pregnant but with history of habitual abortion were involved in this study as control. Results: T suppressor cell activity in early pregnancy was lower than that of middle and late pregnancy ( P <0.01, P <0.001) and also lower than that of the control groups ( P <0.01, P <0.001). The successful rate of fetus preservation of YXATG was 98.2%, and 98.0% of the cases got normal delivery. Conclusion: Low T suppressor cell activity might be the immunologic etiology of HA. The fetus preservative effect of YXATG might be due to its regulatory effect on T suppressor cell activity.
文摘目的:基于小鼠渐进衰老模型探讨衰老所致“正虚”的免疫功能衰退表征的特点。方法:使用不同月龄(2、6、15月龄)C57BL/6小鼠,通过流式细胞术检测并比较小鼠外周血和脾组织中T细胞、髓源性抑制细胞(MDSC)及其亚群的丰度变化。结果:外周血中T细胞亚群表型为CD3^(+)CD4^(+)CD44-CD62L^(+)的幼稚CD4^(+)T细胞(2 vs 6月龄,P=0.137;2 vs 15月龄,P=0.004;6 vs15月龄,P=0.105)和表型为CD3^(+)CD8^(+)CD44-CD62L^(+)的幼稚CD8^(+)T细胞(2 vs 6月龄,P=0.179;2 vs 15月龄,P=0.001;6 vs15月龄,P=0.015)出现与衰老有关的细胞比例降低,差异具有统计学意义。表型为CD3^(+)CD4^(+)CD44^(+)CD62L^(+)的中央记忆CD8^(+)T细胞出现与衰老有关的比例升高,差异具有统计学意义(2 vs 6月龄,P=0.01;2 vs 15月龄,P=0.007;6 vs 15月龄,P=0.164)。对脾组织的检测结果具有与外周血相同特点。同时,CD8^(+)T细胞比例随衰老逐渐升高(2 vs 6月龄,P=0.027;2 vs 15月龄,P<0.001;6 vs15月龄,P<0.001);表型为CD8^(+)CD28^(+)的活化CD8^(+)T细胞亚群比例也出现随月龄增长的上升(2 vs 6月龄,P=0.863;2 vs 15月龄,P=0.016;6 vs 15月龄,P=0.024),差异均具有统计学意义。结论:衰老所致“正虚”过程中,不同免疫细胞亚群变化并不都反映免疫抑制特点,虽然总体免疫功能下降,但单一表型难以反应整体免疫功能变化。
文摘异基因骨髓移植(Allogeneic Bone Marrow Transplantation,ABMT)后,受体的免疫功能长期缺损,是患者术后极易感染死亡的重要原因之一.本文对ABMT小鼠(C57BL/6→BALB/c)免疫功能缺损的机制进行了探讨,发现ABMT小鼠IL-2产生明显受损;其脾细胞与(C57BL/6小鼠脾细胞一起过继转移到致死量照射的BALB/C小鼠体内,能抑制移植物抗宿主病(GVHD)的发生.去除其脾T细胞后,这种抑制作用丧失,ABMT小鼠脾细胞上清中发现一种非特异的抑制因子,能抑制正常小鼠脾细胞产生混合淋巴细胞反应的能力;能抑制正常小鼠的脾细胞产生IL-2;抑制正常小鼠脾细胞毒T淋巴细胞(CTL)的杀伤活性.用抗Thy-1.2单抗和补体去除ABMT小鼠脾T细胞后,其脾细胞培养上(?)的上述抑制活性丧失.这说明ABMT小鼠脾T(?)细胞活性增强是其免疫功能缺损的重要原因之一,它通过释放非特异的抑制因子执行其免疫抑制功能.
