Li Y, Szabo P, Robinson M A, Dong B, Posnett D N
Department of Medicine, Cornell University Medical College, New York, New York 10021.
J Exp Med. 1990 Jan 1;171(1):221-30. doi: 10.1084/jem.171.1.221.
Polymorphisms of human TCR gene products have been suggested by the description of a mAb, OT145, that identifies a subset of TCRs in some individuals but not in others (6). Here we demonstrate that this mAb detects a TCR allotype of the V beta 6.7 gene. Two allelic products of this V gene differ by two nonconservative amino acid substitutions. The mAb OT145 appears to react with V beta 6.7 a gene products ("+" allele), but not with V beta 6.7b gene products ("-" allele). This represents the first direct demonstration that TCR V gene allotypes exist and provides a possible explanation for immune responses under the control of TCR V genes and for disease associations with TCR V genes.
一种单克隆抗体OT145的描述提示了人类TCR基因产物的多态性,该抗体可识别部分个体而非所有个体中的TCR亚群(6)。在此,我们证明该单克隆抗体可检测Vβ6.7基因的一种TCR同种异型。该V基因的两种等位基因产物因两个非保守氨基酸替换而有所不同。单克隆抗体OT145似乎与Vβ6.7a基因产物(“+”等位基因)发生反应,但不与Vβ6.7b基因产物(“-”等位基因)发生反应。这是首次直接证明TCR V基因同种异型的存在,并为TCR V基因控制下的免疫反应以及TCR V基因与疾病的关联提供了一种可能的解释。