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Issue 11, 2013
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Large-scale cytological profiling for functional analysis of bioactive compounds

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Cytological profiling (CP) is an unbiased image-based screening technique that uses automated microscopy and image analysis to profile compounds based on numerous quantifiable phenotypic features. We used CP to evaluate a library of nearly 500 compounds with documented mechanisms of action (MOAs) spanning a wide range of biological pathways. We developed informatics techniques for generating dosage-independent phenotypic “fingerprints” for each compound, and for quantifying the likelihood that a compound's CP fingerprint corresponds to its annotated MOA. We identified groups of features that distinguish classes with closely related phenotypes, such as microtubule poisons vs. HSP90 inhibitors, and DNA synthesis vs. proteasome inhibitors. We tested several cases in which cytological profiles indicated novel mechanisms, including a tyrphostin kinase inhibitor involved in mitochondrial uncoupling, novel microtubule poisons, and a nominal PPAR-gamma ligand that acts as a proteasome inhibitor, using independent biochemical assays to confirm the MOAs predicted by the CP signatures. We also applied maximal-information statistics to identify correlations between cytological features and kinase inhibitory activities by combining the CP fingerprints of 24 kinase inhibitors with published data on their specificities against a diverse panel of kinases. The resulting analysis suggests a strategy for probing the biological functions of specific kinases by compiling cytological data from inhibitors of varying specificities.

Graphical abstract: Large-scale cytological profiling for functional analysis of bioactive compounds

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Publication details

The article was received on 23 Jun 2013, accepted on 20 Aug 2013 and first published on 20 Aug 2013

Article type: Paper
DOI: 10.1039/C3MB70245F
Citation: Mol. BioSyst., 2013,9, 2604-2617
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    Large-scale cytological profiling for functional analysis of bioactive compounds

    M. H. Woehrmann, W. M. Bray, J. K. Durbin, S. C. Nisam, A. K. Michael, E. Glassey, J. M. Stuart and R. S. Lokey, Mol. BioSyst., 2013, 9, 2604
    DOI: 10.1039/C3MB70245F

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