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首页> 外文期刊>Infection and immunity >Relative activities of distinct isotypes of murine and human major histocompatibility complex class II molecules in binding toxic shock syndrome toxin 1 and determination of CD antigens expressed on T cells generated upon stimulation by the toxin.
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Relative activities of distinct isotypes of murine and human major histocompatibility complex class II molecules in binding toxic shock syndrome toxin 1 and determination of CD antigens expressed on T cells generated upon stimulation by the toxin.

机译:鼠类和人类主要组织相容性复合体II类分子的不同同种型在结合毒性休克综合症毒素1和确定毒素刺激后在T细胞上表达的CD抗原的相对活性。

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Relative abilities of murine and human major histocompatibility complex class II molecules to bind toxic shock syndrome toxin 1 (TSST-1) and T-cell subsets activated by the toxin were investigated. TSST-1 binding was observed in L cells transfected with I-Ab, I-Ak, DR2, and DQw1 genes. Scatchard plot analysis showed similar Kd values (1 x 10(-8) to 3 x 10(-8) M) for these cells. By comparison, binding was not detected in L cells transfected with I-Ek, DPw4, and DP(Cp63) genes. All of the transfectants supported TSST-1-induced proliferative response and interleukin-2 production by murine and human T cells. Levels of accessory activity were lower in the I-Ek transfectants and the DPw4 and DP(Cp63) transfectants than in the I-Ab and I-Ak transfectants and the DR2 and DQw1 transfectants, respectively. The results indicate that I-A, DR, and DQ molecules bind TSST-1 with similar affinities, whereas I-E and DP molecules bind it with fairly low affinity. TSST-1-activated T cells consisted of both CD4+ and CD8+ T cells, indicating that TSST-1 activates these two T-cell subsets.
机译:研究了鼠类和人类主要组织相容性复合物II类分子结合毒性休克综合征毒素1(TSST-1)和被毒素激活的T细胞亚群的相对能力。在用I-Ab,I-Ak,DR2和DQw1基因转染的L细胞中观察到TSST-1结合。斯卡查德图分析显示这些细胞的Kd值相似(1 x 10(-8)至3 x 10(-8)M)。相比之下,在用I-Ek,DPw4和DP(Cp63)基因转染的L细胞中未检测到结合。所有转染子均支持TSST-1诱导的鼠类和人T细胞的增殖反应和白介素2的产生。 I-Ek转染子,DPw4和DP(Cp63)转染子的辅助活性水平分别低于I-Ab和I-Ak转染子以及DR2和DQw1转染子。结果表明,I-A,DR和DQ分子以相似的亲和力结合TSST-1,而I-E和DP分子以相当低的亲和力结合它。 TSST-1激活的T细胞由CD4 +和CD8 + T细胞组成,表明TSST-1激活了这两个T细胞亚群。

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