Perry L L, Dorf M E, Benacerraf B, Greene M I
Proc Natl Acad Sci U S A. 1979 Feb;76(2):920-4. doi: 10.1073/pnas.76.2.920.
We present evidence for a role of I-A subregion-encoded determinants in syngeneic tumor immunity. In animals rendered immune to the S1509a fibrosarcoma, daily treatment with microliter quantities of antisera directed against Kk and I-Ak determinants expressed on lymphoid cells of host origin decreased the capacity for immune tumor rejection. Absorption studies revealed that anti-I-Ak antibody activity alone was sufficient for the manifestation of this effect. Furthermore, experiments utilizing F1 hybrids showed that an antiserum that was genetically unable to interact with H-2 determinants expressed on the tumor was equally effective in inhibiting tumor immunity. Suggestive evidence that the activity of this antiserum is related to interference with the generation of effector T cell function was provided by the observation that hyperimmune animals pretreated with an anti-Kk,I-Ak antiserum were no longer capable of adoptively transferring tumor immunity to naive recipients. Thus, it is possible to regulate the secondary immune response to tumor antigens by using antisera with specificity for I-A determinants expressed on cells or possibly on factors of the host lymphoid system.
我们提供了I-A亚区编码决定簇在同基因肿瘤免疫中作用的证据。在对S1509a纤维肉瘤产生免疫的动物中,每天用微升量针对宿主来源淋巴细胞上表达的Kk和I-Ak决定簇的抗血清进行治疗,会降低免疫肿瘤排斥的能力。吸收研究表明,仅抗I-Ak抗体活性就足以表现出这种效应。此外,利用F1杂种进行的实验表明,一种在遗传上无法与肿瘤上表达的H-2决定簇相互作用的抗血清在抑制肿瘤免疫方面同样有效。通过观察发现,用抗Kk、I-Ak抗血清预处理的超免疫动物不再能够将肿瘤免疫过继转移给未免疫的受体,这为该抗血清的活性与干扰效应T细胞功能的产生有关提供了提示性证据。因此,有可能通过使用对细胞上或可能对宿主淋巴系统因子上表达的I-A决定簇具有特异性的抗血清来调节对肿瘤抗原的二次免疫反应。