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H-2复合体在体内诱导T辅助细胞中的作用。II. 受I-A和I-A/E决定簇限制的T细胞离散亚群的阴性选择

Role of the H-2 complex in induction of T helper cells in vivo. II Negative selection of discrete subgroups of T cells restricted by I-A and I-A/E determinants.

作者信息

Sprent J, Alpert B

出版信息

J Exp Med. 1981 Apr 1;153(4):823-31. doi: 10.1084/jem.153.4.823.

Abstract

Previous studies have shown that negative selection of T cells to sheep erythrocytes (SRC) after adoptive transfer to irradiated mice requires a sharing of H-2 determinants between the donor T cells and the selection hosts. This paper examines which part of the H-2 complex controls selection. The results show that, in the case of T cells of the H-2k haplotype, complete selection occurs with donor host matching limited to the I-A through I-E subregions of the H-2 complex. Selection to SRC was partial in I-A compatible, I-E incompatible hosts, minimal or not detectable in I-A incompatible, I-E compatible hosts, but near-complete in hosts matched at both the I-A and I-E subregions. Consecutive selection in hosts matched solely at (a) the I-A subregion and (b) the I-E subregion led to incomplete selection. From these and other findings it is argued that H-2k T cells comprise a mixture of T cells restricted by I-A and I-A/E hybrid molecules.

摘要

先前的研究表明,将T细胞过继转移到受照射小鼠后,T细胞对绵羊红细胞(SRC)的阴性选择需要供体T细胞与选择宿主之间共享H-2决定簇。本文研究了H-2复合体的哪一部分控制选择。结果表明,对于H-2k单倍型的T细胞,当供体与宿主在H-2复合体的I-A至I-E亚区相匹配时,会发生完全选择。在I-A相容、I-E不相容的宿主中对SRC的选择是部分的,在I-A不相容、I-E相容的宿主中选择最少或无法检测到,但在I-A和I-E亚区均匹配的宿主中接近完全选择。仅在(a)I-A亚区和(b)I-E亚区匹配的宿主中进行连续选择会导致不完全选择。从这些以及其他发现可以推断,H-2k T细胞包含受I-A和I-A/E杂交分子限制的T细胞混合物。

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