2005
DOI: 10.1177/1087057104269989
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Identification of Akt Pathway Inhibitors Using Redistribution Screening on the FLIPR and the IN Cell 3000 Analyzer

Abstract: The PI3-kinase/Akt pathway is an important cell survival pathway that is deregulated in the majority of human cancers. Despite the apparent druggability of several kinases in the pathway, no specific catalytic inhibitors have been reported in the literature. The authors describe the development of a fluorometric imaging plate reader (FLIPR)-based Akt1 translocation assay to discover inhibitors of Akt1 activation. Screening of a diverse chemical library of 45,000 compounds resulted in identification of several … Show more

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Cited by 52 publications
(23 citation statements)
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“…The subcellular localization of target proteins that lie downstream of the perturbation provides a visual read-out for measuring the activity of signaling pathways and supports the identification of small molecule compounds or relevant therapeutic targets that might be exploited pharmaceutically to restore or interfere with protein localization and function (Kau et al, 2003;Kau et al, 2004;Zanella et al, 2010c;Zanella et al, 2008). The analysis of the subcellular relocalization of signaling proteins, including NF-B (Taylor, 2010), FOXO (Kau et al, 2003;Link et al, 2009;Zanella et al, 2010c;Zanella et al, 2008;Zanella et al, 2009), NFAT (Wolff et al, 2006), p27Kip1, p53 (Xu et al, 2008), estrogen receptor alpha (Dull et al, 2010), p38 (Trask et al, 2006;Trask et al, 2009), Ets domain transcriptional repressor (ERF1) (Granas et al, 2006), AKT (Lundholt et al, 2005;Rosado et al, 2008;Wolff et al, 2006), glucokinase (Wolff et al, 2008) and HIV1 regulator of virion (REV) (Zanella et al, 2010b), have shed light on molecular mechanisms that underlie the spatiotemporal regulation of protein translocation and led to the identification of small molecule agents that interfere with the corresponding signaling networks.…”
Section: Discussionmentioning
confidence: 99%
“…The subcellular localization of target proteins that lie downstream of the perturbation provides a visual read-out for measuring the activity of signaling pathways and supports the identification of small molecule compounds or relevant therapeutic targets that might be exploited pharmaceutically to restore or interfere with protein localization and function (Kau et al, 2003;Kau et al, 2004;Zanella et al, 2010c;Zanella et al, 2008). The analysis of the subcellular relocalization of signaling proteins, including NF-B (Taylor, 2010), FOXO (Kau et al, 2003;Link et al, 2009;Zanella et al, 2010c;Zanella et al, 2008;Zanella et al, 2009), NFAT (Wolff et al, 2006), p27Kip1, p53 (Xu et al, 2008), estrogen receptor alpha (Dull et al, 2010), p38 (Trask et al, 2006;Trask et al, 2009), Ets domain transcriptional repressor (ERF1) (Granas et al, 2006), AKT (Lundholt et al, 2005;Rosado et al, 2008;Wolff et al, 2006), glucokinase (Wolff et al, 2008) and HIV1 regulator of virion (REV) (Zanella et al, 2010b), have shed light on molecular mechanisms that underlie the spatiotemporal regulation of protein translocation and led to the identification of small molecule agents that interfere with the corresponding signaling networks.…”
Section: Discussionmentioning
confidence: 99%
“…These key features serve to increase the quality of hit compounds and allow meaningful direct progression of compounds through functional characterization without further in vitro ADME/Tox studies. High-content screening assays also have certain disadvantages, including the need for specialized personnel and expensive equipment (see Lundholt et al 17 for discussion), and traditional cell-based assays for cancer drug discovery, such as tumor cell proliferation assays, may also allow the discovery of tumor-selective compounds. However, it is often difficult to find relevant control cell lines as most tumor cell lines have different growth characteristics from corresponding normal cells.…”
Section: Discussionmentioning
confidence: 99%
“…17,21 The MAPK pathway is a key regulator of cellular proliferation. Several proteins in this pathway are known as relevant targets for cancer therapy, and a number of drugs inhibiting this pathway are already in preclinical or clinical development.…”
Section: Redistributionmentioning
confidence: 99%
See 1 more Smart Citation
“…Examples of published screens at large and medium scale include de-orphanizing of GPCR receptors in a 750,000-compound screen 24 and complex mechanistic investigation of 45,000 compounds using protein translocation assays to identify and profile Akt1 inhibitors. 25 So what are the evolutionary forces and drivers in action today? What is the future of HCS when pharma philosophy has shifted toward "fail early" 26 and the economic climate is very different from more profligate times when new technologies were seized upon in the race to screen more and more, faster and The evolution of bench-top HCS instruments from the first widely available commercial system from Cellomics continuing through the latest releases from each of the major HCS vendors.…”
mentioning
confidence: 99%