The cell competition-based high-throughput screening identifies small compounds that promote the elimination of RasV12-transformed cells from epithelia
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Updated: Mar 31, 2026
High-throughput Screening for Chemical Modulators of Post-transcriptionally Regulated Genes
Published on: March 3, 2015
Hajime Yamauchi1, Takanori Matsumaru2, Tomoko Morita1
1Division of Molecular Oncology, Institute for Genetic Medicine, Hokkaido University Graduate School of Chemical Sciences and Engineering, Sapporo, Japan.
Abstract:
Recent studies have revealed that cell competition can occur between normal and transformed epithelial cells; normal epithelial cells recognize the presence of the neighboring transformed cells and actively eliminate them from epithelial tissues. Here, we have established a brand-new high-throughput screening platform that targets cell competition. By using this platform, we have identified Rebeccamycin as a hit compound that specifically promotes elimination of RasV12-transformed cells from the epithelium, though after longer treatment it shows substantial cytotoxic effect against normal epithelial cells. Among several Rebeccamycin-derivative compounds, we have found that VC1-8 has least cytotoxicity against normal cells but shows the comparable effect on the elimination of transformed cells. This cell competition-promoting activity of VC1-8 is observed both in vitro and ex vivo. These data demonstrate that the cell competition-based screening is a promising tool for the establishment of a novel type of cancer preventive medicine.
Insights
Scientists discovered a new screening method to find compounds that eliminate cancerous cells through cell competition. Rebeccamycin and its derivative VC1-8 show promise for cancer prevention by targeting transformed cells.
Area of Science:
- Oncology
- Cell Biology
- Pharmacology
Background:
- Cell competition is a biological process where normal cells eliminate neighboring transformed cells.
- Identifying compounds that selectively eliminate transformed cells is crucial for cancer prevention strategies.
Purpose of the Study:
- To establish a high-throughput screening platform for cell competition.
- To identify novel compounds that promote the elimination of transformed epithelial cells.
Main Methods:
- Development of a novel high-throughput screening platform to study cell competition.
- Screening of compounds, including Rebeccamycin and its derivatives, for their ability to promote transformed cell elimination.
- In vitro and ex vivo validation of compound efficacy and cytotoxicity.
Main Results:
- A high-throughput screening platform for cell competition was successfully established.
- Rebeccamycin was identified as a hit compound promoting RasV12-transformed cell elimination, with notable cytotoxicity to normal cells upon prolonged exposure.
- The Rebeccamycin derivative, VC1-8, demonstrated comparable elimination of transformed cells with significantly reduced cytotoxicity to normal cells, validated both in vitro and ex vivo.
Conclusions:
- Cell competition-based screening is a viable approach for discovering novel cancer preventive agents.
- VC1-8 represents a promising candidate for developing new cancer preventive medicines due to its selective elimination of transformed cells.
