Selective elimination of human pluripotent stem cells by a marine natural product derivative

Area of Science:

• Biochemistry and Molecular Biology
• Stem Cell Biology
• Drug Discovery

Background:

• Tumorigenic potential of residual undifferentiated stem cells is a major hurdle for stem cell therapy.
• Developing methods for selective elimination of pluripotent stem cells is crucial for therapeutic safety.

Purpose of the Study:

• To identify reagents that selectively induce the death of human pluripotent stem cells.
• To explore the role of ATP-binding cassette (ABC) transporters in stem cell survival and drug selectivity.

Main Methods:

• Conducted a cell-based screening of 333 cytotoxic compounds.
• Identified methyl 27-deoxy-27-oxookadaate (molecule 1) as a selective agent.
• Investigated the interaction of molecule 1 with ABCB1 (MDR1) and ABCG2 (BCRP) transporters.

Main Results:

• Methyl 27-deoxy-27-oxookadaate selectively induces death in human pluripotent stem cells.
• Molecule 1 is a substrate for ABCB1 and ABCG2 transporters, which are repressed in pluripotent stem cells.
• Expression levels of ABC transporters correlate with sensitivity to the cytotoxic compound.

Conclusions:

• Selective elimination of human pluripotent stem cells is achievable using small molecules targeting ABC transporters.
• Synthetic okadaic acid derivatives can be designed as selective cytotoxic agents for stem cell therapy applications.
• This approach offers a promising strategy to mitigate the risks associated with residual undifferentiated stem cells.