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A20 [A-20]

Company: ATCC
Catalog#: TIB-208
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Generation of Luciferase-expressing Tumor Cell Lines
Author:
Date:
2018-04-20
[Abstract]  Murine tumor models have been critical to advances in our knowledge of tumor physiology and for the development of effective tumor therapies. Essential to these studies is the ability to both track tumor development and quantify tumor burden in vivo. For this purpose, the introduction of genes that confer tumors with bioluminescent properties has been a critical advance for oncologic studies in rodents. Methods of introducing bioluminescent genes, such as firefly luciferase, by viral transduction has allowed for the production of tumor cell lines that can be followed in vivo longitudinally over long periods of time. Here we describe methods for the production of stable luciferase expressing tumor cell lines by lentiviral transduction. [摘要]  鼠肿瘤模型对于我们对肿瘤生理学知识和有效肿瘤治疗方法发展的进展至关重要。 这些研究的关键是能够跟踪肿瘤发展并量化体内肿瘤负荷。 为此,引入赋予肿瘤生物发光特性的基因已经成为啮齿动物肿瘤研究的重要进展。 通过病毒转导引入生物发光基因(例如萤火虫萤光素酶)的方法已经允许产生可以在体内纵向长时间地进行的肿瘤细胞系。 在这里我们描述了通过慢病毒转导产生稳定表达荧光素酶的肿瘤细胞系的方法。

【背景】体内跟踪细胞最重要的是能够通过微创方法从外部检测它们。使用来自萤火虫的荧光素酶(Photinus pyralis )的酶促生物发光是用于体内基于图像的细胞追踪的广泛使用的方法。生物发光已被用于各种体内应用,包括报告基因表达的无创成像(Herschman,2004),研究昼夜节律(Southern and Millar,2005),成像脑卒中(Vandeputte

萤火虫荧光素酶氧化物萤光素在分子氧,镁和三磷酸腺苷存在下在560nm产生黄绿色光(Wilson和Hastings,1998; ...

In vitro Antigen-presentation Assay for Self- and Microbial-derived Antigens
Author:
Date:
2017-06-05
[Abstract]  Antigen presenting cells (APC) are able to process and present to T cells antigens from different origins. This mechanism is highly regulated, in particular by Patter Recognition Receptor (PRR) signals. Here, I detail a protocol designed to assess in vitro the capacity of APC to present antigens derived from bacteria, apoptotic and infected apoptotic cells. [摘要]  抗原呈递细胞(APC)能够处理和呈递来自不同来源的T细胞抗原。这种机制是高度调节的,特别是通过Patter Recognition Receptor(PRR)信号。在这里,我详细说明了一种设计用于评估体外的APC方案,用于展示来源于细菌,凋亡和感染的凋亡细胞的抗原。

背景 T细胞淋巴细胞在其表面上表达T细胞受体(TCR),其允许识别作为与主要组织相容性复合物(MHC)分子结合的抗原加工和呈递的抗原的细胞(自身)或微生物(非自身)抗原)呈递细胞(APC)。 APC能够处理抗原并将其呈递给T细胞,并且MHC-TCR相互作用是感染和自身免疫应答期间T细胞活化的关键步骤。
 以前的作品已经描述了基于刺激模式识别受体(PRR),例如toll样受体(TLR)(Blander和Medzhitov,2004和2006)的抗原呈递的调节机制。实际上,特异性地来自含有微生物病原体的吞噬体的TLR信号有利于在MHC-II分子内呈递非自身抗原。另一方面,凋亡细胞吞噬后产生的自身抗原由于不存在TLR刺激而导致溶酶体降解。然而,当两者都来自感染的凋亡细胞并且同时由相同的吞噬体携带时,自身和非自身抗原的分离不会发生,其由针对抗原呈递的TLR信号最佳地定制。已经使用骨髓来源的树突状细胞(BMDC)和凋亡性小鼠B细胞 - ...

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