MacDonald H R, Pedrazzini T, Schneider R, Louis J A, Zinkernagel R M, Hengartner H
Ludwig Institute for Cancer Research, Lausanne Branch, Epalinges, Switzerland.
J Exp Med. 1988 Jun 1;167(6):2005-10. doi: 10.1084/jem.167.6.2005.
The cellular basis of neonatally induced T cell tolerance has been investigated in a model system in which usage of a particular TCR V beta segment (V beta 6) is strongly correlated with reactivity to antigens encoded by the Mlsa genetic locus. Expression of V beta 6 by peripheral T cells was virtually abolished in BALB/c (H-2d, Mlsb) mice rendered neonatally tolerant to DBA/2 (H-2d, Mlsa) lymphoid cells, whereas control V beta 8-bearing T cells remained at near normal levels. Further analysis revealed that elimination of V beta 6+ T cells occurred in the thymus of neonatally tolerant mice and could not be explained by receptor modulation or T cell chimerism. These data thus support the clonal deletion model of tolerance induction.
在一个模型系统中研究了新生期诱导的T细胞耐受性的细胞基础,在该系统中,特定TCR Vβ片段(Vβ6)的使用与对由Mlsa基因座编码的抗原的反应性密切相关。在新生期对DBA/2(H-2d,Mlsa)淋巴细胞产生耐受性的BALB/c(H-2d,Mlsb)小鼠中,外周T细胞Vβ6的表达几乎被消除,而对照的携带Vβ8的T细胞仍维持在接近正常的水平。进一步分析表明,新生期耐受小鼠的胸腺中发生了Vβ6+ T细胞的清除,这不能用受体调节或T细胞嵌合现象来解释。因此,这些数据支持耐受性诱导的克隆清除模型。