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Phenotype-Guided Natural Products Discovery Using Cytological Profiling.

Jessica L Ochoa1, Walter M Bray1, R Scott Lokey1

  • 1Department of Chemistry and Biochemistry, University of California, Santa Cruz , 1156 High Street, Santa Cruz, California 95064, United States.

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Phenotype-guided discovery uses cytological profiling to identify natural products targeting specific cellular processes. This method successfully isolated compounds inducing mitotic arrest and modulating calcium channels.

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Area of Science:

  • Natural Product Drug Discovery
  • Chemical Biology
  • Cell Biology

Background:

  • Phenotype-guided natural product discovery offers unbiased biological annotation.
  • High-content screening predicts compound modes of action from cellular impact data.

Purpose of the Study:

  • To utilize a cytological profiling platform for isolating compounds with a specific mode of action: mitotic arrest.
  • To demonstrate the platform's flexibility in characterizing novel compound activities.

Main Methods:

  • Screening a microbially derived extract library using a cytological profiling platform.
  • Clustering cytological profiles of extracts with known antimitotic agents.
  • Detailed analysis of bioactive constituents from a selected extract.

Main Results:

  • Six extracts showed cytological profiles similar to known antimitotic agents.
  • Diketopiperazine XR334 was isolated, confirming the antimitotic phenotype.
  • Nocapyrone L was identified with a profile matching calcium channel modulators.

Conclusions:

  • Cytological profiling enables targeted isolation of natural products with specific modes of action.
  • The platform is versatile for de novo characterization of compound bioactivity.
  • This approach accelerates the discovery of novel bioactive natural products.