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首页> 外文期刊>Cell biology international. >Human b cell differentiation: dependence on interactions with monocytes and T lymphocytes via CD40, CD80 (B7.1), and the CD2-Ligands CD48 and CD58 (LFA-3).
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Human b cell differentiation: dependence on interactions with monocytes and T lymphocytes via CD40, CD80 (B7.1), and the CD2-Ligands CD48 and CD58 (LFA-3).

机译:人类b细胞分化:依赖于通过CD40,CD80(B7.1)以及CD2-配体CD48和CD58(LFA-3)与单核细胞和T淋巴细胞的相互作用。

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B cell differentiation depends on cellular interactions with T lymphocytes and monocytes via adhesion molecules (AM). In order to characterize AM which are required for B cell differentiation immunoglobulin production using unseparated peripheral blood mononuclear cells (PBMC) was studied. Unstimulated human PBMC were cultured for 9 days with mAb directed at CD2/CD48, /CD58, CD59, CD5/CD72, CD11a-CD18/CD54, CD28/CD80, CD86, CD40/CD40L, or rat CD2 (control). B cell differentiation was quantified measuring IgM and in some cases IgA, IgG, and IgE production. IgM levels were significantly reduced by mAb against CD40, CD48, CD58 and CD80. The reduction was not due to isotype switching to IgA, IgG or IgE. The role of CD40, CD48, CD58 and CD80 was further investigated after depletion of different cell types. Depletion of monocytes and NK cells resulted in no detectable IgM production irrespective of added mAbs. In contrast, IgM production was still present after depletion of T cells and NK cells. Only mAb against CD80 and CD48 significantly reduced IgM production, the reduction of IgM production by anti-CD40 mAb was less than in the presence of T cells. Importantly, anti-CD58 mAb had no effect on IgM production after T cell and NK cell depletion. Taken together, the AM CD40, CD48, CD58, and CD80 are involved in Ig production of unseparated PBMCs. In this model of B cell differentiation only the AM CD58 depend on the presence of T cells while CD48 and CD80 help was found to be T cell independent. Copyright 1998 Academic Press.
机译:B细胞的分化取决于通过粘附分子(AM)与T淋巴细胞和单核细胞的细胞相互作用。为了表征B细胞分化所需的AM,研究了使用未分离的外周血单核细胞(PBMC)产生免疫球蛋白的方法。将未刺激的人PBMC与针对CD2 / CD48,/ CD58,CD59,CD5 / CD72,CD11a-CD18 / CD54,CD28 / CD80,CD86,CD40 / CD40L或大鼠CD2(对照)的mAb培养9天。通过测量IgM和某些情况下的IgA,IgG和IgE产生来量化B细胞分化。抗CD40,CD48,CD58和CD80的mAb可显着降低IgM水平。减少不是由于同种型转换为IgA,IgG或IgE。耗尽不同细胞类型后,进一步研究了CD40,CD48,CD58和CD80的作用。单核细胞和NK细胞的耗竭导致没有检测到的IgM产生,而与添加的mAb无关。相反,在T细胞和NK细胞耗尽后,仍然存在IgM产生。仅针对CD80和CD48的mAb显着降低了IgM的产生,抗CD40 mAb降低的IgM的产生小于存在T细胞的情况。重要的是,抗CD58 mAb对T细胞和NK细胞耗尽后的IgM产生没有影响。综上所述,AM CD40,CD48,CD58和CD80参与了未分离PBMC的Ig生产。在这种B细胞分化模型中,只有AM CD58依赖于T细胞的存在,而CD48和CD80的帮助却与T细胞无关。版权所有1998学术出版社。

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