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50 ml Centrifuge Tube

Company: Krackeler
Catalog#: 229421
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FRET Reporter Assays for cAMP and Calcium in a 96-well Format Using Genetically Encoded Biosensors Expressed in Living Cells
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2020-06-05
[Abstract]  Stimulation of G protein-coupled receptors (GPCR) by hormones and neurotransmitters elicits cellular responses, many of which result from alterations in the concentrations of cytosolic cAMP and Ca2+. Here, we describe a microplate reader fluorescence resonance energy transfer (FRET) assay that uses the genetically encoded biosensors H188 and YC3.60 so that it is possible to monitor the kinetics with which alterations of [cAMP] or [Ca2+] occur in monolayers or suspensions of living cells exposed to GPCR agonists. This protocol uses HEK293 cell lines doubly transfected with a FRET biosensor and a recombinant GPCR of interest (e.g., glucagon receptors, CCK2 receptors, or NPY2R receptors). The protocol allows for rapid screening of small molecule GPCR ... [摘要]  [摘要] 激素和神经递质刺激G蛋白偶联受体(GPCR)引起细胞反应,其中许多是由于胞质cAMP和Ca 2+ 浓度的变化所致。在这里,我们描述了酶标仪的荧光共振能量转移使用遗传编码的生物传感器H188和YC3.60进行FRET)分析,从而可以监测暴露于GPCR激动剂的活细胞的单层或悬浮液中[cAMP]或[Ca 2+ ]发生变化的动力学。该协议使用FRET 生物传感器和感兴趣的重组GPCR 双重转染的HEK293细胞系(例如 ,胰高血糖素受体,CCK 2 受体或NPY2R受体)。该方案可快速筛选小分子GPCR 激动剂和拮抗剂,它还可用于发现具有GPCR活化作用的合成单,双和三激动肽。属性。

[背景] 活细胞荧光共振能量转移(FRET)分析结合显微镜和数字成像技术通常用于监测cAMP和Ca 2+的水平响应GPCR激动剂刺激而波动的动力学。另一种不使用显微镜的方法,而是使用自动荧光分光光度计和活细胞的单层或悬浮液,以96孔格式基于FRET的cAMP和Ca 2+ 的检测。该方案使用基因编码的生物传感器,以实现平均动力学可以在已知浓度应用GPCR激动剂的条件下,使用酶标仪实时获得药理研究数据。这些FRET分析使用稳定表达cAMP生物传感器H188(Klarenbeek 等人,2015 )或Ca的细胞系2+ 生物传感器YC3.60(Nagai ...

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