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Updated: Jun 1, 2026
High-throughput Screening for Chemical Modulators of Post-transcriptionally Regulated Genes
Published on: March 3, 2015
High-content screening for chemical modulators of embryonal carcinoma cell differentiation and survival
Ivana Barbaric1, Mark Jones, David J Harley
1Centre for Stem Cell Biology, Department of Biomedical Science, University of Sheffield, Western Bank, Sheffield, UK. i.barbaric@sheffield.ac.uk
Abstract:
Disentangling the complex interactions that govern stem cell fate choices of self-renewal, differentiation, or death presents a formidable challenge. Image-based phenotype-driven screening meets this challenge by providing means for rapid testing of many small molecules simultaneously. Pluripotent embryonal carcinoma (EC) cells offer a convenient substitute for embryonic stem (ES) cells in such screens because they are simpler to maintain and control. The authors developed an image-based screening assay to identify compounds that affect survival or differentiation of the human EC stem cell line NTERA2 by measuring the effect on cell number and the proportion of cells expressing a pluripotency-associated marker SSEA3. A pilot screen of 80 kinase inhibitors identified several compounds that improved cell survival or induced differentiation. The survival compounds Y-27632, HA-1077, and H-8 all strongly inhibit the kinases ROCK and PRK2, highlighting the important role of these kinases in EC cell survival. Two molecules, GF109203x and rottlerin, induced EC differentiation. The effects of rottlerin were also investigated in human ES cells. Rottlerin inhibited the self-renewal ability of ES cells, caused the cell cycle arrest, and repressed the expression of pluripotency-associated genes.
Insights
This study used image-based screening to find compounds affecting human embryonal carcinoma cell fate. Kinase inhibitors like Y-27632 improved survival, while rottlerin induced differentiation in both EC and ES cells.
Area of Science:
- Stem cell biology
- Chemical biology
- High-throughput screening
Background:
- Understanding stem cell fate (self-renewal, differentiation, death) is complex.
- Image-based screening allows rapid testing of small molecules for stem cell applications.
- Human embryonal carcinoma (EC) cells are a practical model for embryonic stem (ES) cells in screening.
Purpose of the Study:
- To develop an image-based assay for identifying compounds influencing NTERA2 EC cell survival and differentiation.
- To screen kinase inhibitors for effects on EC cell fate.
- To investigate the role of specific kinases in EC cell survival and ES cell self-renewal.
Main Methods:
- Developed an image-based screening assay for NTERA2 cells.
- Measured changes in cell number and SSEA3 pluripotency marker expression.
- Screened 80 kinase inhibitors and validated compound effects on human ES cells.
Main Results:
- Identified kinase inhibitors affecting EC cell survival and differentiation.
- Y-27632, HA-1077, and H-8 inhibited ROCK and PRK2, enhancing EC cell survival.
- GF109203x and rottlerin induced EC cell differentiation.
- Rottlerin inhibited human ES cell self-renewal, arrested the cell cycle, and repressed pluripotency genes.
Conclusions:
- ROCK and PRK2 kinases play a key role in EC cell survival.
- Rottlerin effectively induces differentiation and inhibits self-renewal in both EC and human ES cells.
- Image-based screening is a powerful tool for discovering compounds that modulate stem cell fate.
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