Zijlstra M, Auchincloss H, Loring J M, Chase C M, Russell P S, Jaenisch R
Whitehead Institute for Biomedical Research, Cambridge, Massachusetts.
J Exp Med. 1992 Apr 1;175(4):885-93. doi: 10.1084/jem.175.4.885.
Mice homozygous for a beta 2-microglobulin (beta 2-m) gene disruption lack beta 2-m protein and are deficient for functional major histocompatibility complex class I (MHC-I) molecules. The mutant mice have normal numbers of CD4+8- T helper cells, but lack MHC-I-directed CD4-8+ cytotoxic T lymphocytes (CTLs). In this study we used the beta 2-m mutant mice to study the importance of MHC-I-directed immunity in skin graft rejection. Our results indicate that MHC-I-directed CD8+ CTLs are not essential in the rejection of allografts with whole MHC or multiple minor H differences. However, the absence of MHC-I-guided immunity profoundly reduces the ability of mutant mice to reject H-Y disparate grafts. In addition, we show that natural killer cells which vigorously reject MHC-I-deficient bone marrow grafts, are not effective in the destruction of MHC-I-deficient skin grafts.
纯合子β2-微球蛋白(β2-m)基因敲除小鼠缺乏β2-m蛋白,且功能性主要组织相容性复合体I类(MHC-I)分子存在缺陷。该突变小鼠的CD4+8-T辅助细胞数量正常,但缺乏MHC-I导向的CD4-8+细胞毒性T淋巴细胞(CTL)。在本研究中,我们使用β2-m突变小鼠来研究MHC-I导向免疫在皮肤移植排斥反应中的重要性。我们的结果表明,MHC-I导向的CD8+CTL在具有完整MHC或多个次要组织相容性抗原差异的同种异体移植排斥反应中并非必不可少。然而,缺乏MHC-I导向的免疫会显著降低突变小鼠排斥H-Y不相合移植的能力。此外,我们发现,能强烈排斥MHC-I缺陷骨髓移植的自然杀伤细胞,在破坏MHC-I缺陷皮肤移植方面并不有效。