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Biotin anti-human IFN-γ Antibody

生物素抗人IFN-γ抗体

Company: BioLegend
Catalog#: 502504
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ELISPOT Assay to Measure Peptide-specific IFN-γ Production
Author:
Date:
2017-06-05
[Abstract]  Interferon-gamma (IFN-γ) is crucial for immunity against intracellular pathogens and for tumor control. It is produced predominantly by natural killer (NK) and natural killer T cells (NKT) as well as by antigen-specific Th1 CD4+ and CD8+ effector T cells. When investigating immune responses against pathogens and cancer cells, measuring antigen-specific cytokine-responses by cells of adaptive immunity offers an advantage over total non-specific cytokine responses. Significantly, the measurement of antigen-specific IFN-γ responses against pathogens or cancer cells, when compared to a treatment group, provides a quantitative measure of how well the treatment works. Measuring antigen-specific IFN-γ responses involves culture of the cells being considered (CD4+ ... [摘要]  干扰素-γ(IFN-γ)对细胞内病原体免疫和肿瘤控制至关重要。它主要由天然杀伤剂(NK)和天然杀伤T细胞(NKT)以及抗原特异性Th1 CD4 + / sup和CD8 + /效应T细胞产生。当研究针对病原体和癌细胞的免疫应答时,通过适应性免疫测量细胞的抗原特异性细胞因子反应提供了优于总非特异性细胞因子反应的优点。值得注意的是,与治疗组相比,抗病原体或癌细胞的抗原特异性IFN-γ反应的测量提供了治疗效果的定量测量。测量抗原特异性IFN-γ应答涉及用抗原呈递细胞(APC)和特异性肽从正在考虑的细胞(CD4 + sup +或CD8 + sup + T细胞)与没有肽的对照培养物相比,靶病原体或癌细胞。在合适的时间范围之后,通过ELISPOT测定来测量释放的细胞因子。有或无肽分泌IFN-γ的细胞数量的差异是抗原特异性IFN-γ应答的量度。该测定可以应用于其它细胞因子如IL-10。

背景 干扰素γ(IFN-γ)是二型可溶性细胞因子,其是II类干扰素的唯一成员(Gray和Goeddel,1982)。 IFN-γ具有抗病原体,免疫调节和抗肿瘤特性(Schroder等人,2004),其促进NK细胞活性,增加抗原呈递,激活诱导型一氧化氮合酶,诱导从激活的浆细胞产生IgG2a,并通过上调转录因子T-bet来促进T 1分化。
 鉴于这种细胞因子在免疫应答中的重要作用,有几个方法来量化IFN-γ。也许最简单的措施是ELISA测定法,用于通过用抗体捕获细胞因子来测量血清样品和组织培养上清液中细胞因子的水平(Schreiber,2001)。还有一种基于流式细胞术的测定法,其中细胞内IFN-γ在细胞透化后通过流式细胞术检测(Andersson等人,1988)。含有细胞因子的细胞的百分比通常较低,并且不表示蛋白质是否是功能性的,如果其被分泌并且不测量其是否响应于特异性靶抗原或多种抗原。 ...

Extraction and Identification of T Cell Stimulatory Self-lipid Antigens
Author:
Date:
2015-06-05
[Abstract]  Autoreactive T cells restricted to CD1 molecules and specific for endogenous lipids are abundant in human blood (de Jong et al., 2010; de Lalla et al., 2011). A few self-lipid molecules recognized by diverse individual T cell clones and accumulated within APCs following stress signals or cell transformation have been identified so far (de Jong et al., 2010; Chang et al., 2008; Lepore et al., 2014). These findings suggested that auto-reactive CD1-restricted T cells display broad lipid specificities and may play critical roles in different types of immune responses including cancer immune surveillance, autoimmunity and antimicrobial immunity. Therefore, the identification of the repertoire of self-lipid molecules recognized by T cells is ... [摘要]  限于CD1分子并且对内源性脂质特异的自身反应性T细胞在人血液中是丰富的(de Jong等人,2010; de Lalla等人,2011)。迄今已经鉴定了多种单个T细胞克隆识别并在应激信号或细胞转化后在APC内积累的一些自身脂质分子(de Jong等人,2010; Chang等人。,2008; Lepore ,2014)。这些研究结果表明自反应CD1限制性T细胞显示广泛的脂质特异性,可能在不同类型的免疫反应,包括癌症免疫监视,自身免疫和抗微生物免疫中发挥关键作用。因此,鉴定由T细胞识别的自身脂质分子的所有组成成分对于研究该T细胞群的生理功能和评估其治疗潜力是重要的(Lepore等人,2014)。这里我们描述了我们建立的用于分离和鉴定源自白血病细胞的内源性脂质的方案,其刺激特异性自身反应性CD1c限制性T淋巴细胞(Lepore等人,2014)。该方案可以应用于从任何类型的靶细胞分离脂质抗原,并研究限制于所有CD1同种型的自身反应性T细胞的自身脂质抗原特异性(Facciotti等人,2012)。

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