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This version was published on February
1, 2006
Journal of Biomolecular Screening, Vol. 11, No. 1,
21-28 (2006)
DOI: 10.1177/1087057105280726
Identification of a Small Molecule That Induces Mitotic Arrest Using a Simplified High-Content Screening Assay and Data Analysis Method
Christopher J. Wilson
Department of Chemical Genomics, ArQule Incorporated, Woburn, MA
Ying Si
Department of Chemical Genomics, ArQule Incorporated, Woburn, MAchris_wilson{at}alum.mit.edu
Craig M. Thompsons
Department of Chemical Genomics, ArQule Incorporated, Woburn, MA; Cell Signaling Technologies Incorporated, Beverly, MA
Andrew Smellie
Department of Informatics and Modeling, ArQule Incorporated, Woburn, MA
Mark A. Ashwell
Department of Drug Discovery Chemistry, ArQule Incorporated, Woburn, MA
Ji-Feng Liu
Ping Ye
Daniel Yohannes
Department of Chemistry, ArQule Incorporated, Woburn, MA
Shi-Chung Ng
Department of Chemical Genomics, ArQule Incorporated, Woburn, MA
High-content screening has emerged as a newand powerful technique for identifying small-molecule modulators ofmammalian cell biology. The authors describe the development and execution of a high-content screen to identify smallmolecules that induce mitotic arrest in mammalian cancer cells. Many widely used chemotherapeutics, such as Taxol ®and vinblastine, induce mitotic arrest, and the creation of new drugs that also induce mitotic arrest may have tremendous therapeutic value. In their screen, the authors employed a simple DNA stain (DAPI) and a sensitive nonparametric statistical test to identify compounds from an internal collection of 13,000 high-quality lead-like small molecules. Subsequent analysis of 1 active compound indicated that it induces mitotic arrest, assessed using a high-content phosphohistone H3 detection assay, and caused cell proliferation defects inmultiple cancer cell lines. The active compound, a quinazolinone originating from a natural product-like subset of the screened compounds, is active in cells at 500nMand appears to act by inhibiting the polymerization of tubulin.
Key Words: high-content screening image-based screening mitotic arrest tubulin
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