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Updated: Feb 26, 2026
A Simple Method for High Throughput Chemical Screening in Caenorhabditis Elegans
Published on: March 20, 2018
Discovery of small molecule inhibitors for the C. elegans caspase CED-3 by high-throughput screening
Scott J Brantley1, Steven W Cotten1, David R Lamson2
1Division of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA.
Abstract:
C. elegans has been widely used as a model organism for programmed cell death and apoptosis. Although the CED-3 caspase is the primary effector of cell death in C. elegans, no selective inhibitors have been identified. Utilizing high-throughput screening with recombinant C. elegans CED-3 protein, we have discovered and confirmed 21 novel small molecule inhibitors. Six compounds had IC50 values < 10 μM. From these, four distinct chemotypes were identified. The inhibitor scaffolds described here could lead to the development of selective molecular probes to facilitate our understanding of programmed cell death in this model organism.
Insights
Researchers identified 21 novel small molecule inhibitors for CED-3 caspase, a key protein in programmed cell death in C. elegans. Six potent inhibitors were found, offering new tools to study apoptosis.
Area of Science:
- Molecular Biology
- Biochemistry
- Genetics
Background:
- Caenorhabditis elegans (C. elegans) is a crucial model organism for studying programmed cell death and apoptosis.
- The CED-3 caspase is the primary effector of cell death in C. elegans.
- Selective inhibitors for CED-3 have been lacking, hindering research.
Purpose of the Study:
- To discover and validate novel small molecule inhibitors targeting C. elegans CED-3 caspase.
- To identify distinct chemical scaffolds for potential use as molecular probes.
Main Methods:
- High-throughput screening was employed using recombinant C. elegans CED-3 protein.
- Inhibitory activity was confirmed, and IC50 values were determined for identified compounds.
Main Results:
- Twenty-one novel small molecule inhibitors of C. elegans CED-3 were discovered and confirmed.
- Six compounds exhibited potent inhibition with IC50 values below 10 μM.
- Four distinct chemotypes were identified among the most effective inhibitors.
Conclusions:
- The identified inhibitor scaffolds represent promising starting points for developing selective molecular probes.
- These probes can significantly advance the understanding of programmed cell death mechanisms in C. elegans.
- The findings provide valuable tools for apoptosis research in this widely used model organism.
