Hodes R J, Kimoto M, Hathcock K S, Fathman C G, Singer A
Proc Natl Acad Sci U S A. 1981 Oct;78(10):6431-5. doi: 10.1073/pnas.78.10.6431.
The ability of long-term cultured and monoclonal T cell populations to provide antigen-specific help was assessed in a system of Ir gene-controlled in vitro antibody responses to soluble antigens. T-cell colonies and monoclonal T-cell lines were generated which proliferated specifically in response to poly(LTyr,Glu)-poly(DLAla)--poly(LLys) [(T,G)-A--L] and were I-A restricted in these proliferative responses. These (T,G)-A--L-specific T-cell populations were evaluated for their ability to help unprimed and T-cell depleted spleen cell populations in the generation of antibody responses to trinitrophenyl (TNP)-(T,G)-A--L in vitro. It was found that long-term T-cell lines, including monoclonal T-cell populations derived by limiting dilution, were highly efficient helper cells for IgM responses to TNP-(T,G)-A--L. These helper T cells were both antigen-specific and I-A restricted in their ability to be activated and to cooperate with T-cell depleted spleen cell populations. Once specifically activated, however, these clones provided help that was antigen nonspecific. These studies have thus demonstrated the ability of antigen-specific and H-2-restricted monoclonal T-cell populations to provide help for responses to soluble antigens in vitro.
在一个受Ir基因控制的针对可溶性抗原的体外抗体反应系统中,评估了长期培养的单克隆T细胞群体提供抗原特异性辅助的能力。生成了T细胞集落和单克隆T细胞系,它们能针对聚(L-酪氨酸,L-谷氨酸)-聚(D-丙氨酸)-聚(L-赖氨酸)[(T,G)-A-L]特异性增殖,且这些增殖反应受I-A限制。评估了这些针对(T,G)-A-L的特异性T细胞群体在体外对三硝基苯(TNP)-(T,G)-A-L产生抗体反应时,帮助未致敏和T细胞耗竭的脾细胞群体的能力。发现长期T细胞系,包括通过有限稀释获得的单克隆T细胞群体,是对TNP-(T,G)-A-L产生IgM反应的高效辅助细胞。这些辅助性T细胞在被激活以及与T细胞耗竭的脾细胞群体合作的能力方面,既是抗原特异性的又是受I-A限制的。然而,一旦被特异性激活,这些克隆提供的辅助是抗原非特异性的。因此,这些研究证明了抗原特异性和H-2限制的单克隆T细胞群体在体外为针对可溶性抗原的反应提供辅助的能力。