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Bright-GloTM Luciferase Assay System

Bright-Glo TM萤光素酶测定系统

Company: Promega
Catalog#: E2610
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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; ...

TGFβ Release Co-culture Assay
Author:
Date:
2014-12-05
[Abstract]  TGFβ is a potent cytokine modulating various processes including proliferation, differentiation, ECM synthesis and apoptosis (Siegel and Massague, 2003). Thus in many tissues availability of TGFβ is tightly regulated. TGFβ is secreted as an inactive complex where it is encapsulated by the latency associated protein (LAP), a ligand trap protein, which inhibits TGFβ binding to its receptor and retains TGFβ in the extracellular matrix (ten Dijke and Arthur, 2007). TGFβ can be released from the matrix and converted into its biological active form by huge number of processes including heat, high and low pH, release of reactive oxygen species (ROS) or various proteases (e.g. plasmin, elastase, matrix metalloproteinase-2 and -9) (Barcellos-Hoff and Dix, 1996; Lyons et al., ... [摘要]  TGFβ是调节各种过程包括增殖,分化,ECM合成和凋亡的有效细胞因子(Siegel和Massague,2003)。因此,在许多组织中,TGFβ的可用性受到严格调控。 TGFβ作为无活性复合物分泌,其中其被潜伏相关蛋白(LAP)封闭,LAP是一种配体捕获蛋白,其抑制TGFβ与其受体结合并在细胞外基质中保留TGFβ(十Dijke和Arthur,2007)。 TGFβ可以从基质中释放并通过大量的过程包括热,高和低pH,活性氧(ROS)或各种蛋白酶(例如,纤溶酶,弹性蛋白酶)的释放而转化为其生物活性形式,基质金属蛋白酶-2和-9)(Barcellos-Hoff和Dix,1996; Lyons等人,1988; Taipale等人,1994; Yu和Stamenkovic, 2000)。然而,在生理条件下,αv-类整联蛋白与LAP蛋白中的RGD三肽基序的相互作用代表了体内TGFβ释放的关键因素。具有整联蛋白结合缺陷型LAP蛋白(RGD基序突变为RGE)的小鼠重现了TGFβ1缺失的所有主要表型,进一步强调了整合素介导的TGFβ释放对体内发育和体内平衡的相关性小鼠,包括多器官炎症和血管发生中的缺陷(Shull等人,1992; Yang等人,2007)。这种引人注目的表型与TGFβ缺陷小鼠重叠,缺少αv-类整联蛋白的小鼠的表型(Aluwihare等人,2009; ...

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