Fluorescence-Based High Throughput Screening Technologies for Natural Chloride Ion Channel Blockers
1Hong-Hui Hospital, College of Medicine , Xi'an Jiaotong University , Xi'an , China.
Chemical Research in Toxicology
|November 21, 2018
Summary
Researchers identified new chloride channel inhibitors from natural compounds using a novel fluorescence-based screening method. This approach offers a sensitive and reliable way to discover potential therapeutic agents from natural sources.
Area of Science:
- Pharmacology and Molecular Biology
- Natural Product Chemistry
- Cell Signaling
Background:
- Chloride channels are crucial drug targets, with blockers showing therapeutic potential by modulating cell signaling pathways like apoptosis and autophagy.
- Existing clinical drugs with chloride channel inhibitory properties are lacking, creating a need for new therapeutic agents.
- Natural product extracts offer a promising avenue for drug discovery due to their low toxicity, cost-effectiveness, and abundant availability.
Purpose of the Study:
- To develop and validate a fluorescence-based high-throughput screening (HTS) model for identifying chloride channel blockers from natural compounds.
- To discover novel natural compounds with chloride channel inhibitory activity.
- To assess the reliability and sensitivity of the developed HTS model.
Main Methods:
- Construction and verification of a fluorescence-based EYFP-H148Q/I153L-HeLa cell line model using molecular cloning, real-time PCR, and Western blotting.
- Screening of 6,988 natural compounds using the developed HTS model to identify potential chloride channel blockers.
- Validation of hit compounds using electrophysiological patch-clamp analysis.
Main Results:
- Seven hit compounds exhibiting chloride channel blocking activity were identified from the natural compound library.
- Compound PC-4 was preliminarily identified as a novel chloride channel inhibitor.
- The fluorescence-based HTS model demonstrated reliability and sensitivity in discovering biologically active compounds.
Conclusions:
- The developed fluorescence-based HTS model is effective for discovering chloride channel inhibitors from natural sources.
- Natural products represent a valuable resource for identifying novel therapeutic agents targeting chloride channels.
- Further investigation of PC-4 and other identified compounds may lead to the development of new drugs for various conditions.
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