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A Strategy to Identify Compounds that Affect Cell Growth and Survival in Cultured Mammalian Cells at Low-to-Moderate Throughput
Published on: September 22, 2019
Identification of a small molecule that induces mitotic arrest using a simplified high-content screening assay and
Christopher J Wilson1, Ying Si, Craig M Thompsons
1Department of Chemical Genomics, ArQule Incorporated, Woburn, MA, USA. chris_wilson@alum.mit.edu
Journal of Biomolecular Screening
|October 20, 2005
Summary
Researchers identified a novel small molecule that halts cancer cell division. This quinazolinone compound, found via high-content screening, inhibits tubulin polymerization, offering potential for new cancer therapies.
Area of Science:
- Cell Biology
- Pharmacology
- Drug Discovery
Background:
- High-content screening (HCS) is a powerful method for identifying small molecules that modulate mammalian cell biology.
- Mitotic arrest is a key mechanism of action for many established cancer chemotherapeutics.
- Developing novel mitotic arrest inducers holds significant therapeutic potential for cancer treatment.
Purpose of the Study:
- To develop and implement a high-content screen to identify small molecules that induce mitotic arrest in mammalian cancer cells.
- To discover novel compounds with potential anticancer activity through phenotypic screening.
Main Methods:
- Utilized a high-content screening approach with a DNA stain (DAPI) and a nonparametric statistical test.
- Screened an internal library of approximately 13,000 lead-like small molecules.
- Validated mitotic arrest induction using a phosphohistone H3 detection assay and assessed effects on cancer cell proliferation.
Main Results:
- Identified one active compound, a quinazolinone, from a natural product-like subset of the library.
- The compound effectively induced mitotic arrest in cancer cells at nanomolar concentrations (approx. 500 nM).
- Demonstrated cell proliferation defects in multiple cancer cell lines treated with the active compound.
Conclusions:
- The identified quinazolinone compound successfully induces mitotic arrest in cancer cells.
- The compound's mechanism of action involves the inhibition of tubulin polymerization.
- This discovery provides a promising lead for the development of new anticancer drugs targeting mitosis.
