Department of Applied Biological Chemistry, The University of Tokyo, Tokyo, 113-8657, Japan.
Cytotechnology. 2003 Nov;43(1-3):81-8. doi: 10.1023/b:cyto.0000039895.11048.1b.
In this study, we demonstrate the role of interleukin 12 (IL-12), CD80 and CD86 in T helper type 1 (Th1) and Th2 differentiation induced through antigen presentation by Peyer's patch (PP) and spleen (SPL) cells with various doses of antigen. IL-12 was found to be critical for the induction of Th1-type cytokine producing cells, while antigen-dose dependent patterns of differentiation into Th2-type cytokine producing cells were not altered by the blockade of IL-12. Further, the difference in the pattern of Th2-type cytokine producing cell differentiation induced by PP and SPL cells depending on the antigen dosage were preserved in the absence of IL-12. When the function of CD86 was blocked by specific antibody, the induction of Th1-type cytokine producing cells was kept at high levels through every antigen dose, and the difference between PP and SPL cells was abrogated. With regard to Th2 induction, CD86 enhanced the differentiation of Th2-type cytokine producing cells but it was not essential in the case of antigen presentation by SPL cells. These results suggest that antigen-dose dependent changes in Th2 cell induction are regulated by additional factors which cannot induce antigen-dose dependent changes in Th1 cell differentiation by themselves.
在这项研究中,我们通过不同剂量的抗原展示,证明了白细胞介素 12(IL-12)、CD80 和 CD86 在派尔氏结(PP)和脾脏(SPL)细胞诱导的 T 辅助型 1(Th1)和 Th2 分化中的作用。研究发现,IL-12 对于诱导 Th1 型细胞因子产生细胞至关重要,而 Th2 型细胞因子产生细胞的分化模式不受 IL-12 阻断的影响,与抗原剂量呈依赖性。此外,在缺乏 IL-12 的情况下,PP 和 SPL 细胞诱导的 Th2 型细胞因子产生细胞分化模式的差异仍得以保留。当用特异性抗体阻断 CD86 的功能时,通过每个抗原剂量都能保持 Th1 型细胞因子产生细胞的高诱导水平,同时消除了 PP 和 SPL 细胞之间的差异。关于 Th2 诱导,CD86 增强了 Th2 型细胞因子产生细胞的分化,但对于 SPL 细胞呈递抗原的情况并非必需。这些结果表明,Th2 细胞诱导的抗原剂量依赖性变化是由其他因素调节的,这些因素本身不能诱导 Th1 细胞分化的抗原剂量依赖性变化。