{{'Search' | translate}}
 

LD Columns

LD列

公司名称: Miltenyi Biotec
产品编号: 130-042-901
Bio-protocol()
Company-protocol()
Other protocol()

Adoptive Transfer of Tumor Expanded Regulatory T Cells (Tregs)
Author:
Date:
2016-08-20
[Abstract]  Regulatory T cells (Tregs), a subset of CD4+CD25+ T cells, infiltrate tumors and suppress antitumor activity of effector T and NK cells. Depletion of Tregs by anti CD25+ antibodies has been shown to reduce tumor growth and metastasis (Olkhanud et al., 2009). Conversely, adoptive transfer of Tregs induced immune suppression and promoted tumor growth (Smyth et al., 2006; Janakiram et al., 2015). We have adoptively transferred Tregs to evaluate their immunosuppressive function in vivo. Our study (Vences-Catalan et al., ... [摘要]  调节性T细胞(Treg)(CD4 + CD25 + T细胞的子集)浸润肿瘤并抑制效应T和NK细胞的抗肿瘤活性。已显示抗CD25 sup/+抗体减少Treg减少肿瘤生长和转移(Olkhanud等人,2009)。相反,Treg的过继转移诱导免疫抑制并促进肿瘤生长(Smyth等人,2006; Janakiram等人,2015)。我们已经过继转移Treg以评价它们在体内的免疫抑制功能。我们的研究(Vences-Catalan等人,2015)比较了源自荷瘤野生型的Treg与CD81KO小鼠的免疫抑制功效。以下协议可以适用于任何其他来源的Tregs。
 通过使用来自MACS Miltenyi Biotec的CD4 + CD25 +调节性T细胞分离试剂盒的两步程序分离和纯化淋巴结或脾肿瘤诱导的Treg。首先,通过阴性选择,然后CD25阳性选择+ T细胞富集CD4 + T细胞。然后将肿瘤诱导的纯化的Treg(CD3 + CD4 CD25 + FoxP3 + 与肿瘤细胞转化为幼稚小鼠(Winn测定)(Winn,1960)。根据研究需要,Treg也可以静脉内注射一次或几次。然后通过测径器或通过体内成像技术测量过继转移的Treg对肿瘤生长的影响。

Reconstitution of Lymphopaenic Mice with Regulatory and Conventional T cell Subsets
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。

Isolation of Splenic Dendritic Cells Using Fluorescence-activated Cell Sorting
Author:
Date:
2015-03-05
[Abstract]  The spleen is a vastly vasculated organ and consists of a complex organized network of innate and adaptive immune cells. This permits the specialized functions of the spleen such as antibacterial and antifungal immunity and iron metabolism among others (Mebius and Kraal, 2005). Different dendritic cell (DC) subsets reside in the spleen and can be defined by the expression of unique surface markers. These DC subsets are recognized to perform non-redundant functions in the immune system (Merad et al., 2013). In our recent study, we found that Inositol Requiring Enzyme (IRE)-1 is ... [摘要]  脾脏是一个巨大的血管的器官,由一个复杂的有组织的网络的先天和适应性免疫细胞组成。 这允许脾的特殊功能,例如抗菌和抗真菌免疫和铁代谢等(Mebius和Kraal,2005)。 不同的树突状细胞(DC)子集驻留在脾脏中,并且可以通过表达独特的表面标志物来定义。 认识到这些DC亚类在免疫系统中执行非冗余功能(Merad等人,2013)。 在我们最近的研究中,我们发现肌醇需求酶(IRE)-1在脾CD8a + DC中特异性激活。 此外,X-box结合蛋白(XBP)-1(由IRE-1调节的转录因子)的缺失导致脾CD8a + DC(Osorio em> et al。,2014)。 该协议允许分离用于实验使用的特异性DC亚群ex-vivo 。

产品评论