| Reconstitution of Lymphopaenic Mice with Regulatory and Conventional T cell Subsets
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Author:
Date:
2016-05-20
[Abstract] Transfer of mature T cells into immunodeficient mice results in sub-optimal reconstitution of the peripheral T cell pool. Under lymphopenic conditions, dendritic cells are released from tonic control by regulatory T cells (Tregs), and consequently drive activation and proliferation of low affinity T cells specific for endogenous antigens. This oligoclonal proliferation results in a T cell population dominated by T cells possessing an effector/memory phenotype and a limited TCR repertoire. Oligoclonal expansion can be prevented by selectively reconstituting the Treg compartment prior to T cell ...
[摘要] 将成熟T细胞转移到免疫缺陷小鼠中导致外周T细胞库的次优重建。在淋巴细胞减少症状下，树突状细胞通过调节性T细胞（Tregs）从强直对照释放，并因此驱动对内源性抗原特异的低亲和力T细胞的激活和增殖。这种寡克隆增殖导致由具有效应/记忆表型和有限TCR库的T细胞支配的T细胞群。可以通过在T细胞转移之前选择性重建Treg区室来防止寡克隆扩增（Bolton等人，2015）。已经在免疫缺陷小鼠品系例如Rag-1 /或 Rag-2 -/- 中测试了淋巴细胞减少小鼠的Treg区室的重建。 小鼠，以及在通过致死性全身照射作为调节骨髓移植（BMT）的瞬时淋巴细胞减少的免疫小鼠中。将纯化的Treg转移到这些宿主中，结合用外源IL-2处理7天，足以重建Treg区室并减少树突细胞共刺激分子的表达，这是防止自身反应性T细胞不适当扩增的关键过程。在Treg重建后转移的T细胞不经历快速的自发增殖，而是进行慢的内稳态分裂以用天然T细胞重新增殖T细胞库，从而允许外周T细胞库的最佳重建。
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| Immunolocalization of Proteins in Corals: the V-type H+-ATPase Proton Pump
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Author:
Date:
2015-09-05
[Abstract] Here we describe the immunolocalization of a membrane-bound proton pump, the V-type H+-ATPase (VHA), in tissues and isolated cells of scleractinian corals. Immunolocalization of coral proteins requires additional steps not required for various model organisms, such as decalcification of the coral skeleton for immunohistochemistry or removal of cells away from the skeleton for immunocytochemistry. The tissue and cell preparation techniques described here can be adapted for localization of other coral proteins, provided the appropriate validation steps have been taken for the primary ...
[摘要] 在这里我们描述膜结合质子泵，V型H + -ATPase（VHA），在组织和分离的细胞的scleractinian珊瑚的免疫定位。 珊瑚蛋白的免疫定位需要对于各种模型生物不需要的额外步骤，例如用于免疫组织化学的珊瑚骨架的脱钙或从用于免疫细胞化学的骨架移除细胞。 本文所述的组织和细胞制备技术可适用于其它珊瑚蛋白的定位，条件是已对所用的一级抗体和珊瑚种类采取了适当的验证步骤。 这些技术对于提高我们对珊瑚细胞生理学的理解是重要的
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| Biotinylation and Purification of Surface-exposed Helicobacter pylori Proteins
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Author:
Date:
2015-04-20
[Abstract] Interactions between pathogenic bacteria and host cells are often mediated by proteins found on the surfaces of the bacteria. The Gram-negative bacterium Helicobacter pylori is predicted to produce at least 50 surface-exposed outer membrane proteins, but there has been relatively little progress in experimentally analyzing the cell-surface proteome of this organism. Herein, we describe in detail a protocol that allows biotinylation and purification of surface-exposed H. pylori proteins. A comparative analysis of surface-exposed proteins identified by this ...
[摘要] 病原细菌和宿主细胞之间的相互作用通常由在细菌表面上发现的蛋白介导。 革兰氏阴性细菌幽门螺杆菌预计产生至少50个表面暴露的外膜蛋白，但是在实验分析该生物体的细胞表面蛋白质组中相对较少的进展。 在本文中，我们详细描述了允许表面暴露的H的生物素化和纯化的方案。 幽门螺杆菌蛋白。 在最近的出版物（Voss等人，2014）中描述了通过这种基于生物素化的方法和几种其它独立方法鉴定的表面暴露蛋白的比较分析。
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