Abstract
High-content screening is transforming drug discovery by enabling simultaneous measurement of multiple features of cellular phenotype that are relevant to therapeutic and toxic activities of compounds. High-content screening studies typically generate immense datasets of image-based phenotypic information, and how best to mine relevant phenotypic data is an unsolved challenge. Here, we introduce factor analysis as a data-driven tool for defining cell phenotypes and profiling compound activities. This method allows a large data reduction while retaining relevant information, and the data-derived factors used to quantify phenotype have discernable biological meaning. We used factor analysis of cells stained with fluorescent markers of cell cycle state to profile a compound library and cluster the hits into seven phenotypic categories. We then compared phenotypic profiles, chemical similarity and predicted protein binding activities of active compounds. By integrating these different descriptors of measured and potential biological activity, we can effectively draw mechanism-of-action inferences.
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Acknowledgements
We thank L. Martell, M. Thoma, J. Nettles, B. Dwyer and M. Pflumm for insightful comments and discussions, G. Paris for assembly of the climax screening collection, A. Salic (Harvard Medical School) for the gift of rhodamine azide, C. Mickanin and S. Zhao for automation support, and Q. Yang for database support. D.W.Y. and A.B. are both Novartis Presidential Postdoctoral Fellows. Work in the T.J.M. lab is supported by US National Institutes of Health grant CA78048.
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Contributions
D.W.Y., A.B., J.L.J., T.J.M. and Y.F. conceived the work. J.H., D.W.Y. and E.M. performed experiments. D.W.Y. developed and implemented factor analysis of HCS data. A.B. performed ligand-target and compound structure analysis. D.W.Y. and A.B. performed integrated statistical analysis of biological and chemical data. D.W.Y., T.J.M. and Y.F. analyzed phenotypes. C.Y.T. performed cell cycle analysis. J.A.T. and M.L. contributed to experimental design and interpretation. G.-W.C. assisted in data processing and analysis. D.W.Y. and A.B. wrote the paper with assistance from J.L.J., T.J.M. and Y.F.
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Supplementary Text and Figures
Supplementary Figures 1–6, Supplementary Table 1 and Supplementary Methods (PDF 1158 kb)
Supplementary Data 1
Workbook containing results from the factor analysis. (XLS 86 kb)
Supplementary Data 2
Table of hit data. (XLS 445 kb)
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Young, D., Bender, A., Hoyt, J. et al. Integrating high-content screening and ligand-target prediction to identify mechanism of action. Nat Chem Biol 4, 59–68 (2008). https://doi.org/10.1038/nchembio.2007.53
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DOI: https://doi.org/10.1038/nchembio.2007.53
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