首页> 美国卫生研究院文献>Proceedings of the National Academy of Sciences of the United States of America >Major histocompatibility complex class I molecule serves as a ligand for presentation of the superantigen staphylococcal enterotoxin B to T cells.
【2h】

Major histocompatibility complex class I molecule serves as a ligand for presentation of the superantigen staphylococcal enterotoxin B to T cells.

机译:主要的组织相容性复合物I类分子用作将超抗原葡萄球菌肠毒素B呈递给T细胞的配体。

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Superantigens, such as staphylococcal enterotoxin B (SEB), elicit a strong proliferative response in T cells when presented in the context of major histocompatibility complex (MHC) class II molecules. We observed a similar T-cell response, when MHC class II-negative epidermal cell lines were employed as antigen-presenting cells. Immunoprecipitation studies indicated that the ligand to which SEB bound had a molecular mass of 46 kDa. Radiolabeled SEB could be immunoprecipitated from isolated membrane proteins on the SCC13 epidermal cell line with a monoclonal antibody directed against the MHC class I molecule, and transfection of the K-562 cell line with MHC class I molecules showed a 75% increased SEB-binding capacity compared with the nontransfected MHC class I- and class II-negative counterpart. In functional studies, antibodies to the MHC class I molecule inhibited T-cell proliferation by at least 50%. From these studies, we conclude that MHC class I molecules on malignant squamous cell carcinomas serve as ligands for SEB, which, given the appropriate costimulatory signals, is sufficient to allow for superantigen-induced T-cell proliferation.
机译:当存在于主要组织相容性复合体(MHC)II类分子中时,超抗原,例如葡萄球菌肠毒素B(SEB),会在T细胞中引起强烈的增殖反应。当MHC II类阴性表皮细胞系用作抗原呈递细胞时,我们观察到了类似的T细胞反应。免疫沉淀研究表明,SEB结合的配体的分子质量为46 kDa。可以使用针对MHC I类分子的单克隆抗体从SCC13表皮细胞系上分离的膜蛋白中免疫沉淀放射性标记的SEB,用MHC I类分子转染K-562细胞系显示SEB结合能力提高了75%与未转染的MHC I类和II类阴性对照相比。在功能研究中,针对MHC I类分子的抗体将T细胞增殖抑制了至少50%。从这些研究中,我们得出的结论是,恶性鳞状细胞癌上的MHC I类分子可作为SEB的配体,如果给予适当的共刺激信号,其足以允许超抗原诱导的T细胞增殖。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号