| In vivo Priming of T Cells with in vitro Pulsed Dendritic Cells: Popliteal Lymph Node Assay
|
|
Author:
Date:
2017-09-05
[Abstract] One-way mixed lymphocyte reaction (MLR) is a classic tool to measure how T cells react to external stimuli. However, MLR is an in vitro reaction system, which shows different response intensity compared with in vivo trails sometimes due to the lack of cytokines, tissue matrix and other immune response associated factors. The following popliteal lymph node assay (PLNA) protocol is designed to test the T cells antigen-specific reaction in vivo by using ovalbumin (OVA) specific reacted transgenic mouse OT-1 and OT-2.
[摘要] 单向混合淋巴细胞反应（MLR）是测量T细胞如何与外部刺激反应的经典工具。 然而，MLR是体外反应系统，其与体内踪迹相比显示出不同的反应强度，有时由于缺乏细胞因子，组织基质和其他免疫应答相关因素。 设计了以下po淋巴结测定（PLNA）方案，通过使用卵白蛋白（OVA）特异性反应的转基因小鼠OT-1和OT-2，体内测试T细胞抗原特异性反应。
【背景】在移植中，自身免疫和感染研究中，单向混合淋巴细胞反应（MLR）是评估T细胞增殖在抗原存在细胞（APC）或其他外部刺激反应中是否增加或抑制的有用参数。 这是一个典型的功能测试，它展示了T细胞如何受到免疫抑制药物（Hou et al。，2015; Zhang et al。，2015），阴性细胞或外来体疫苗（Ma）的测试试剂的影响 et al。，2016; Cai et al。，2017）。
然而，由于体外免疫反应系统，该系统具有一定的限制。 体内免疫反应受生物微环境的影响，如细胞因子，趋化因子，激素分泌，组织基质等未知生物因子。
在这里，po淋巴结测定（PLNA）被设计为体内工具，通过使用卵白蛋白（OVA）抗原特异性反应系统来测试增加或减少的免疫应答（Bhatt等，2014; Cai et al。，2017）。
|
|
|
| Cell Tracer Violet and CellTracker Red CMTPX Staining of Purified Mature Plasmodium-infected Red Blood Cells
|
|
Author:
Date:
2016-08-05
[Abstract] Efficient staining methods to identify Plasmodium-infected red blood cells (iRBCs) are crucial to discriminate precisely the immune cells responsible for their elimination from circulation. Here, we describe the protocol for the purification of iRBCs and their subsequent staining with the vital dyes Cell Tracer Violet (CTV) or CellTracker Red CMTPX (CMTPX), both of which readily diffuse into cells and bind covalently to intracellular amines. The iRBCs stained by using this protocol were used in ex vivo phagocytosis assays, to determine the ability of splenic dendritic cells of phagocytizing these parasites (Borges da Silva et al., 2015).
[摘要] Efficient staining methods to identify Plasmodium-infected red blood cells (iRBCs) are crucial to discriminate precisely the immune cells responsible for their elimination from circulation. Here, we describe the protocol for the purification of iRBCs and their subsequent staining with the vital dyes Cell Tracer Violet (CTV) or CellTracker Red CMTPX (CMTPX), both of which readily diffuse into cells and bind covalently to intracellular amines. The iRBCs stained by using this protocol were used in ex vivo phagocytosis assays, to determine the ability of splenic dendritic cells of phagocytizing ...
|
|
|
| Protocol-In vitro T Cell Proliferation and Treg Suppression Assay with Celltrace Violet
|
|
Author:
Date:
2016-01-05
[Abstract] Measurement of the incorporation of radionuclides such as 3H-thymidine is a classical immunological technique for assaying T cell proliferation. However, such an approach has drawbacks beyond the inconvenience of working with radioactive materials, such as the inability of bulk radionuclide incorporation measurements to accurately quantitate T cell divisions, and an inability to combine proliferation analyses with simultaneous evaluation of the expression of cellular markers in divided cells. By labeling T cells with reactive dyes such as CFSE, Celltrace Violet, and others that are partitioned equally between daughter cells at each cell division, one can relatively easily track generations of proliferated cells and their expression of various molecules by flow cytometry.
...
[摘要] 放射性核素如3 H胸腺嘧啶核苷的掺入的测量是用于测定T细胞增殖的经典免疫学技术。然而，这种方法具有超出使用放射性材料的不便之处的缺点，例如体放射性核素结合测量不能准确地定量T细胞分裂，以及不能结合增殖分析与同时评价分裂的细胞标记物的表达细胞。通过用诸如CFSE，Celltrace Violet等活性染料标记T细胞，在每个细胞分裂的子细胞之间平均分配T细胞，可以通过流式细胞术相对容易地追踪增殖细胞的代和它们的各种分子的表达。 > FoxP3 + 调节性T细胞（Treg）是免疫耐受的关键介质，其功能评价是表征许多免疫模型的重要步骤（Rudensky，2011）。基于其表面表达的CD25（Treg：CD4 + CD25 + sup/+），已经分离了经典的CD4 + Treg和常规或"应答者"T细胞， ，Tresp：CD4 + CD25 - sup/- ）。然而，我们和其他人已经注意到，CD4 + CD25 - 细胞群表达FoxP3转录因子并具有抑制功能。因此，我们利用转基因FoxP3-EGFP小鼠促进基于EGFP（并因此FoxP3）表达的抑制基因和应答者群体的活性纯化。在这里我们提出我们适应的协议，用于测定调节性T细胞抑制Celltrace紫罗兰标记响应T细胞。
|
|
|