目的检测慢性乙型病毒性肝炎患者外周血中iNKT细胞比例、细胞因子分泌能力以及其表面程序性死亡因子1(programmed death 1,PD-1)的表达情况。方法采集慢性乙型肝炎患者外周血,利用CD3、TCR Vα24、TCR Vβ11、CD279单克隆抗体标记后经...目的检测慢性乙型病毒性肝炎患者外周血中iNKT细胞比例、细胞因子分泌能力以及其表面程序性死亡因子1(programmed death 1,PD-1)的表达情况。方法采集慢性乙型肝炎患者外周血,利用CD3、TCR Vα24、TCR Vβ11、CD279单克隆抗体标记后经流式细胞术直接检测iNKT细胞比例及其PD-1表达比例;采用PMA+Ionomycin体外活化iNKT细胞后流式细胞术检测其胞内IFN-γ分泌情况。结果慢性乙型肝炎患者外周血iNKT细胞比例[(0.09±0.04)%]与健康对照者[(0.11±0.07)%]相比无明显差异,但体外活化后胞内IFN-γ分泌量减少[(24.64±7.71)%vs(42.35±11.60)%],且iNKT细胞PD-1表达升高[(36.7±9.7)%vs(16.2±5.4)%]。结论慢性乙型肝炎患者外周血iNKT细胞功能的下降可能与其表面负性刺激分子PD-1表达上调密切相关。展开更多
The interplay between the CD4-1ineage transcription factor ThPok and the CD8-iineage transcription factor, runt-related transcription factor 3 （Runx3）, in T-cell development has been extensively documented. However,...The interplay between the CD4-1ineage transcription factor ThPok and the CD8-iineage transcription factor, runt-related transcription factor 3 （Runx3）, in T-cell development has been extensively documented. However, little is known about the roles of these transcription factors in invariant natural killer T （iNKT） cell development. CDld-restricted iNKT cells are committed to the CD4＋CD8- and CD4-CD8- sublineages, which respond to antigen stimulation with rapid and potent release of T helper （Th） 1 and Th2 cytokines. However, previous reports have demonstrated a new population of CD8~ NKT cells in ThPok-deficient mice. In the current study, we sought to determine whether Runx3 was involved in the re-expression of CD8 and function of iNKT cells in the absence of ThPok. We used mice lacking Runx3, ThPok or both and verified that Runx3 was partially responsible for the appearance of CD8^＋ iNKT cells in ThPok knockout mice. Additionally, Runx3 participated in the immune response mediated by iNKT cells in a model of α-galactosylceramide-induced acute hepatitis. These results indicate that Runx3 is crucial for the phenotypic and functional changes observed in ThPok-deficient iNKT cells.展开更多
文摘目的检测慢性乙型病毒性肝炎患者外周血中iNKT细胞比例、细胞因子分泌能力以及其表面程序性死亡因子1(programmed death 1,PD-1)的表达情况。方法采集慢性乙型肝炎患者外周血,利用CD3、TCR Vα24、TCR Vβ11、CD279单克隆抗体标记后经流式细胞术直接检测iNKT细胞比例及其PD-1表达比例;采用PMA+Ionomycin体外活化iNKT细胞后流式细胞术检测其胞内IFN-γ分泌情况。结果慢性乙型肝炎患者外周血iNKT细胞比例[(0.09±0.04)%]与健康对照者[(0.11±0.07)%]相比无明显差异,但体外活化后胞内IFN-γ分泌量减少[(24.64±7.71)%vs(42.35±11.60)%],且iNKT细胞PD-1表达升高[(36.7±9.7)%vs(16.2±5.4)%]。结论慢性乙型肝炎患者外周血iNKT细胞功能的下降可能与其表面负性刺激分子PD-1表达上调密切相关。
文摘The interplay between the CD4-1ineage transcription factor ThPok and the CD8-iineage transcription factor, runt-related transcription factor 3 （Runx3）, in T-cell development has been extensively documented. However, little is known about the roles of these transcription factors in invariant natural killer T （iNKT） cell development. CDld-restricted iNKT cells are committed to the CD4＋CD8- and CD4-CD8- sublineages, which respond to antigen stimulation with rapid and potent release of T helper （Th） 1 and Th2 cytokines. However, previous reports have demonstrated a new population of CD8~ NKT cells in ThPok-deficient mice. In the current study, we sought to determine whether Runx3 was involved in the re-expression of CD8 and function of iNKT cells in the absence of ThPok. We used mice lacking Runx3, ThPok or both and verified that Runx3 was partially responsible for the appearance of CD8^＋ iNKT cells in ThPok knockout mice. Additionally, Runx3 participated in the immune response mediated by iNKT cells in a model of α-galactosylceramide-induced acute hepatitis. These results indicate that Runx3 is crucial for the phenotypic and functional changes observed in ThPok-deficient iNKT cells.
