VLA‐3: A novel polypeptide association within the VLA molecular complex: cell distribution and biochemical characterization

VLA‐3: A novel polypeptide association within the VLA molecular complex: cell distribution and biochemical characterization
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VLA-3:VLA 分子复合物内的新型多肽关联:细胞分布和生化特征

DOI:
10.1002/eji.1830161106
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发表时间:
1986
影响因子:
5.4
通讯作者:
C. Bernabéu
C. Bernabéu
中科院分区:
医学3区
文献类型:
--
作者:
F. Sánchez‐Madrid;M. de Landázuri;Gloria Morago;M. Cebrián;A. Acevedo;C. Bernabéu

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人T细胞活化相关蛋白家族(称为VLA复合物)由210、165、130和80 kDa的细胞表面糖蛋白分子缔合而成。在本报告中,我们描述了8种不同的单克隆抗体(HP mAb),其特异性针对80-kDa多肽,优先与165-kDa成员结合。比较免疫沉淀和细胞结合研究表明,HP mAb识别的165/80 kDa亚群上的表位与先前描述的其他抗VLA mAb识别的表位不同。此外,通过流式细胞术和过氧化物酶染色进行的细胞和组织分布研究表明,HP反应模式与其他VLA特异性不同。HP mAb定义的165/80-kDa复合物存在于人胸腺细胞、外周血淋巴细胞以及T、B和骨髓单核细胞系中。然而,HP mAb仅从活化的T淋巴细胞中沉淀80-kDa亚基。这些结果表明,165和80 kDa亚基之间的关联在活化过程中减少,HP mAb识别的表位位于80 kDa蛋白上。165/80 kDa的新多肽缔合被称为VLA-3。
The family of human T cell activation‐associated proteins, named VLA complex, is formed by the molecular association of cell surface glycoproteins of 210, 165, 130 and 80 kDa. In this report, we describe eight different monoclonal antibodies (HP mAb) specific for the 80‐kDa polypeptide which preferentially associates with the 165‐kDa member. Comparative immunoprecipitation and cell‐binding studies demonstrated that the HP mAb recognize an epitope(s) on the 165/80 kDa subset different from those recognized by other anti‐VLA mAb previously described. Furthermore, cellular and tissue distribution studies by flow cytometry and peroxidase staining showed that the HP reactivity pattern is different from other VLA specificities. The 165/80‐kDa complex defined by HP mAb is present on human thymocytes, peripheral blood lymphocytes as well as on T, B and myelomonocytic cell lines. However, only the 80‐kDa subunit was precipitated by HP mAb from activated T lymphocytes. These results suggest that the association between the 165‐ and 80‐kDa subunits diminishes during the activation process, and that the epitopes recognized by the HP mAb are located on the 80‐kDa protein. The novel polypeptide association of 165/80 kDa has been termed VLA‐3.
单克隆抗体 (A-1A5) 识别的新型分化抗原复合物的表征:受刺激的 T 细胞上独特的激活特异性分子形式。
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发表时间: 1983
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影响因子: --
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发表时间: 1984
期刊: Journal of immunology (Baltimore, Md. : 1950)
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