技术资料
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文献Hase H et al. (MAR 2004) Blood 103 6 2257--65
BAFF/BLyS can potentiate B-cell selection with the B-cell coreceptor complex.
The tumor necrosis factor (TNF)-like ligand BAFF/BLyS (B-cell activating factor of the TNF family/B-lymphocyte stimulator) is a potent B-cell survival factor,yet its functional relationship with other B-cell surface molecules such as CD19 and CD40 is poorly understood. We found that follicular dendritic cells (FDCs) in human lymph nodes expressed BAFF abundantly. BAFF up-regulated a B cell-specific transcription factor Pax5/BSAP (Pax5/B cell-specific activator protein) activity and its target CD19,a major component of the B-cell coreceptor complex,and synergistically enhanced CD19 phosphorylation by B-cell antigen receptor (BCR). BAFF further enhanced B-cell proliferation,immunoglobulin G (IgG) production,and reactivity to CD154 by BCR/CD19 coligation and interleukin-15 (IL-15). Our results suggest that BAFF may play an important role in FDC-B-cell interactions through the B-cell coreceptor complex and a possibly sequential link between the T cell-independent and -dependent B-cell responses in the germinal centers. View Publication -
文献Grimaldi JC et al. (JUN 1999) Journal of Leukocyte Biology 65 6 846--53
Depletion of eosinophils in mice through the use of antibodies specific for C-C chemokine receptor 3 (CCR3).
We have generated rat monoclonal antibodies specific for the mouse eotaxin receptor,C-C chemokine receptor 3 (CCR3). Several anti-CCR3 mAbs proved to be useful for in vivo depletion of CCR3-expressing cells and immunofluorescent staining. In vivo CCR3 mAbs of the IgG2b isotype substantially depleted blood eosinophil levels in Nippostrongyus brasiliensis-infected mice. Repeated anti-CCR3 mAb treatment in these mice significantly reduced tissue eosinophilia in the lung tissue and bronchoalveolar lavage fluid. Flow cytometry revealed that mCCR3 was expressed on eosinophils but not on stem cells,dendritic cells,or cells from the thymus,lymph node,or spleen of normal mice. Unlike human Th2 cells,mouse Th2 cells did not express detectable levels of CCR3 nor did they give a measurable response to eotaxin. None of the mAbs were antagonists or agonists of CCR3 calcium mobilization. To our knowledge,the antibodies described here are the first mAbs reported to be specific for mouse eosinophils and to be readily applicable for the detection,isolation,and in vivo depletion of eosinophils. View Publication
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