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Kulak O, Yamaguchi K, Lum L. Identification of therapeutic small-molecule leads in cultured cells using multiplexed pathway reporter readouts. Methods Mol Biol 2015; 1263:3-14. [PMID: 25618332 DOI: 10.1007/978-1-4939-2269-7_1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The rapid expansion of molecular screening libraries in size and complexity in the last decade has outpaced the discovery rate of cost-effective strategies to single out reagents with sought-after cellular activities. In addition to representing high-priority therapeutic targets, intensely studied cell signaling systems encapsulate robust reference points for mapping novel chemical activities given our deep understanding of the molecular mechanisms that support their activity. In this chapter, we describe strategies for using transcriptional reporters of several well-interrogated signal transduction pathways coupled with high-throughput biochemical assays to fingerprint novel compounds for drug target identification agendas.
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Affiliation(s)
- Ozlem Kulak
- Department of Cell Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd. NL07.138B, Dallas, TX, 75390-9039, USA
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Zhong R, Dong X, Levine B, Xie Y, Xiao G. iScreen: Image-Based High-Content RNAi Screening Analysis Tools. ACTA ACUST UNITED AC 2014; 20:998-1002. [PMID: 25548139 DOI: 10.1177/1087057114564348] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 11/23/2014] [Indexed: 02/03/2023]
Abstract
High-throughput RNA interference (RNAi) screening has opened up a path to investigating functional genomics in a genome-wide pattern. However, such studies are often restricted to assays that have a single readout format. Recently, advanced image technologies have been coupled with high-throughput RNAi screening to develop high-content screening, in which one or more cell image(s), instead of a single readout, were generated from each well. This image-based high-content screening technology has led to genome-wide functional annotation in a wider spectrum of biological research studies, as well as in drug and target discovery, so that complex cellular phenotypes can be measured in a multiparametric format. Despite these advances, data analysis and visualization tools are still largely lacking for these types of experiments. Therefore, we developed iScreen (image-Based High-content RNAi Screening Analysis Tool), an R package for the statistical modeling and visualization of image-based high-content RNAi screening. Two case studies were used to demonstrate the capability and efficiency of the iScreen package. iScreen is available for download on CRAN (http://cran.cnr.berkeley.edu/web/packages/iScreen/index.html). The user manual is also available as a supplementary document.
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Affiliation(s)
- Rui Zhong
- Quantitative Biomedical Research Center, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Xiaonan Dong
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA Center for Autophagy Research, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Beth Levine
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA Center for Autophagy Research, University of Texas Southwestern Medical Center, Dallas, TX, USA Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX, USA Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Yang Xie
- Quantitative Biomedical Research Center, University of Texas Southwestern Medical Center, Dallas, TX, USA Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Guanghua Xiao
- Quantitative Biomedical Research Center, University of Texas Southwestern Medical Center, Dallas, TX, USA Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, USA
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