
浏览全部资源
扫码关注微信
纸质出版:2011
移动端阅览
何跃,韩容,刘宏,吴雄飞.Herpes virus entry mediator/CD160介导人调节性T细胞对CD4+效应性T细胞的抑制作用[J].陆军军医大学学报(原第三军医大学学报),2011,33(10):1012-1015.
He Yue,Han Rong,Liu Hong,Wu Xiongfei.Human regulatory T cells exert inhibitory function on CD4+ effector T cells through interaction between herpes virus entry mediator and CD160[J].J Amry Med Univ (J Third Mil Med Univ),2011,33(10):1012-1015.
何跃,韩容,刘宏,吴雄飞.Herpes virus entry mediator/CD160介导人调节性T细胞对CD4+效应性T细胞的抑制作用[J].陆军军医大学学报(原第三军医大学学报),2011,33(10):1012-1015. DOI:
He Yue,Han Rong,Liu Hong,Wu Xiongfei.Human regulatory T cells exert inhibitory function on CD4+ effector T cells through interaction between herpes virus entry mediator and CD160[J].J Amry Med Univ (J Third Mil Med Univ),2011,33(10):1012-1015. DOI:
目的 研究HVEM、CD160在不同CD4
+
T细胞亚群,不同功能状态下的表达以及HVEM-CD160通路对CD4
+
CD25
+
调节性T细胞(regulatory T cell,Treg)免疫调节作用的影响。 方法 采用流式细胞分析术分别检测3例不同个体CD4
+
CD25
+
Tregs及CD4
+
CD25
-
T细胞在1 000 IU/ml人重组IL-2、与细胞数量1∶1的抗CD3/CD28 mAb包被磁珠的刺激下第0、3、5天HVEM或CD160的表达情况。采用1.25、2.5、5 μg/ml HSV
1
gD蛋白处理4例不同个体Treg,培养5 d 后,将处理的Treg与Teff在体外以1∶1混合并加入300 IU/ml IL-2及等量抗CD3/CD28 mAb包被磁珠,行混合淋巴细胞共培养,于培养结束前18 h加入
3
H-TdR,共培养7 d后检测各组细胞CPM增殖情况。5 μg/ml gD蛋白处理5例不同个体Treg后将其细胞浓度调整为5×10
6
并接种于6孔培养板内,加入500 IU/ml IL-2共培养7 d,行RT-PCR(Realtime PCR)分析Treg Foxp3基因表达。 结果 HVEM在初始CD4
+
CD25
+
Tregs表面呈中度表达,平均表达率为42%,且随着Treg的活化其表达HVEM上调;CD160在初始CD4
+
CD25
-
T细胞表面呈低度表达,平均表达率仅7%,但伴随其活化,表达CD160有所上调。采用不同浓度HSV
1
gD蛋白处理Treg后2.5 μg/ml与5 μg/ml浓度组抑制CD4
+
CD25
-
T细胞增殖作用与空白对照组(276±35)相比明显下降,CPM值分别为(2 014±202)、(6 535±531),差异具有统计学意义(P0.05),且具有浓度依赖性;RT-PCR分析发现Treg经5 μg/ml gD蛋白处理后Foxp3基因表达率下降,仅为空白对照组的48%,差异具有统计学意义(P0.01)。 结论 机体接受免疫刺激后Treg通过上调HVE
M表达与CD4
+
CD25
-
效应性T细胞(effective T cell,Teff)表面上调表达的受体CD160交联从而上调Treg Foxp3基因的表达,最终介导了Treg对Teff活化、增殖的抑制作用,HVEM-CD160通路对Treg免疫调节作用具有重要意义。
Objective To study the expression of herpes virus entry mediator (HVEM) and CD160 in different CD4
+
T cell subsets under different function states and the influences of HVEM-CD160 pathway on CD4
+
CD25
+
regulatory T cells (Tregs). Methods Flow cytometry was used to detect HVEM and CD160 expression in CD4
+
CD25
+
Tregs and CD4
+
CD25
-
T cells from 3 different individuals at 0
3
and 5 d after stimulation by 1 000 IU/ml human IL-2 and magnetic beads (with equal number to the cells) coated with monoclonal antibodies against CD3 and CD28. Tregs from 4 different individuals were treated with HSV1 gD protein (0
1.25
2.5
and 5 μg/ml separately)
mixed with equivalent CD4
+
CD25
-
T cells and the magnetic beads and 300 IU/ml IL-2 in vitro
and cultured for 7 d.
3
H-TdR was added to the culture liquid 18 h before stopping the culture
and CPM value was detected. Tregs from 5 different individuals were treated with 5 μg/ml gD proteins
adjusted to a concentration of 5×10
6
transferred to a 6-well plate
and cultured with 500 IU/ml IL-2 for 7 d. Treg Foxp3 gene expression was detected by real-time RT-PCR. Results HVEM expression was at a medium level on naive CD4
+
CD25
+
Treg surfaces with an average expression rate of 42%
and was up-regulated along with Treg activation. CD160 expression was at a low level on naive CD4
+
CD25
-
T cell surfaces with an average expression rate of 7%
and was up-regulated along with CD4
+
CD25
-
T cell activation. Tregs treated with 2.5 and 5 μg/ml HSV
1
gD protein had significantly lowered and concentration-dependent inhibition effects on CD4
+
CD25
-
T cell proliferation (average CPM value 2 014±202 and 6 535±531) as compared with Tregs without treatment (average CPM value 276±35
P0.05). RT-PCR results showed that Tregs treated with 5 μg/ml gD protein had a decreased Foxp3 gene expression rate
only 48% that of Tregs without treatment (P0.01). Conclusion After immunostimulation
up-regulated HVEM in activated Tregs and up-regulated CD160 in activated CD4
+
CD25
-
effector T cells (Teffs) interact to promote Treg Foxp3 gene expression
resulting in Treg’s inhibition effects on Teff activation and proliferation. HVEM-CD160 pathway is important for Treg’s inhibitory function.
0
浏览量
0
下载量
0
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621