| AIMTOR, a BRET Biosensor for Live Recording of mTOR Activity in Cell Populations and Single Cells
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Author:
Date:
2021-04-20
[Abstract] Mammalian target of rapamycin (mTOR) controls many crucial cellular functions, including protein synthesis, cell size, energy metabolism, lysosome and mitochondria biogenesis, and autophagy. Consequently, deregulation of mTOR signaling plays a role in numerous pathological conditions such as cancer, metabolic disorders and neurological diseases. Developing new tools to monitor mTOR spatiotemporal activation is crucial to better understand its roles in physiological and pathological conditions. However, the most widely used method to report mTOR activity relies on the quantification of specific mTOR-phosphorylated substrates by western blot. This approach requires cellular lysate preparation, which restricts the quantification to a single time point. Here, we present a simple protocol to ...
[摘要]
[摘要]雷帕霉素(mTOR的)控制许多重要的细胞功能的哺乳动物靶,包括蛋白合成,细胞大小,能量代谢,溶酶体和线粒体生物发生,和自体吞噬。因此,mTOR信号转导的失调在许多病理状况如癌症,代谢紊乱和神经系统疾病中起作用。开发新的工具来监控mTOR的时空激活关键的是要更好地了解它的作用小号在生理和病理条件。但是,最广泛使用的报告mTOR活性的方法取决于对特定mTOR的定量- 磷酸化底物由瓦特西部时代b很多。这种方法需要细胞裂解物的制备,这限制了量化到一个单一的时间点。在这里,我们提出了一个简单的协议来研究mTOR的在活细胞的活性在实时使用AIMTOR,一个分子内BRET基(b ioluminescence ř esonance Ë NERGY吨转让(BOT))的生物传感器,我们最近设计(Bouquier等人,2020) 。我们描述染的AIMTOR中的C2C12细胞系和程序,以监控BRET在用酶标仪细胞群和单细胞显微镜。重要的是,该协议可转座至任何细胞系和原代细胞。另外,已经开发了几种亚细胞区室特异性的AIMTOR版本,使得能够对mTOR活性进行区室化评估。本协议描述了如何使用的敏感AIMTOR生物传感器研究mTOR信号动力学在活细胞中。
图形摘要:
从播种细胞到实时BRET记录的AIMTOR协议概述 ...
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| An Image-based Dynamic High-throughput Analysis of Adherent Cell Migration
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Author:
Date:
2021-03-20
[Abstract] In this protocol, we describe a method to monitor cell migration by live-cell imaging of adherent cells. Scratching assay is a common method to investigate cell migration or wound healing capacity. However, achieving homogenous scratching, finding the optimal time window for end-point analysis and performing an objective image analysis imply, even for practiced and adept experimenters, a high chance for variability and limited reproducibility. Therefore, our protocol implemented the assessment for cell mobility by using homogenous wound making, sequential imaging and automated image analysis. Cells were cultured in 96-well plates, and after attachment, homogeneous linear scratches were made using the IncuCyte® WoundMaker. The treatments were added directly to wells and images were ...
[摘要] [摘要]在此协议中,我们描述了一种通过贴壁细胞的活细胞成像监测细胞迁移的方法。刮擦测定法是研究细胞迁移或伤口愈合能力的常用方法。然而,实现均匀的scratc兴,发现为终点analys的最佳时间窗口我S和执行目标图像分析暗示,即使对于实施,并且熟练的实验者,对变异性和有限的再现性的高机会。因此,我们的协议通过使用均质伤口制作,顺序成像和自动图像分析来实现对细胞移动性的评估。细胞在96孔板中培养,和附着后,使用进行了由均质线状痕INCUCYTE ® W¯¯ oundMaker 。将处理直接添加到孔中,每2小时自动捕获一次图像。Ť此后,对图像进行的ProCE ssed通过定义刮擦掩模,并使用细胞汇合掩模软件算法。数据分析是进行使用的INCUCYTE ®细胞迁移分析软件。因此,我们的协议允许以高度可靠,可再现和可重新分析的方式对细胞迁移的治疗效果进行时滞分析。
[背景]划痕测定小号是用于研究细胞迁移一种广泛使用的方法或伤口愈合的能力。然而,常规方法(手动刮擦)需要技能来执行线性刮擦并且是终点测定(Liang等人,2007 ;Krishnamurthy等人,2016)。通常使用Ima geJ或其他软件手动分析数据。最近,我们在细胞迁移测定中采用了Essen Bioscience的高通量自动成像系统IncuCyte ZOOM ...
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