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Published on: November 15, 2024
Synthesis and structure-activity relationship study of substituted caffeate esters as antinociceptive agents
Nuno Rodrigues1, Khalil Bennis2, Delphine Vivier1
1Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR6296, ICCF, F-63171 Aubière, France.
Abstract:
The TWIK-related K(+) channel, TREK-1, has recently emerged as an attractive therapeutic target for the development of a novel class of analgesic drugs. It has been reported that TREK-1 -/- mice were more sensitive than wild-type mice to painful stimuli, suggesting that activation of TREK-1 could result in pain inhibition. Here we report the synthesis of a series of substituted caffeate esters (12a-u) based on the hit compound CDC 2 (cinnamyl 3,4-dihydroxyl-α-cyanocinnamate). These analogs were evaluated for their ability to modulate TREK-1 channel by electrophysiology and for their in vivo antinociceptive activity (acetic acid induced-writhing assay) leading to the identification a series of novel molecules able to activate TREK-1 and displaying potent analgesic activity in vivo.
Insights
Researchers developed new caffeate ester compounds that activate the TREK-1 channel, demonstrating significant potential for novel pain relief medications. These findings suggest TREK-1 activation is a promising strategy for developing effective analgesics.
Area of Science:
- Neuroscience
- Pharmacology
- Medicinal Chemistry
Background:
- The TWIK-related potassium channel subfamily K member 2 (TREK-1) is implicated in pain signaling.
- TREK-1 knockout mice exhibit heightened sensitivity to pain, suggesting TREK-1 activation may inhibit pain.
Purpose of the Study:
- To synthesize and evaluate novel substituted caffeate esters as TREK-1 modulators.
- To identify compounds with in vivo analgesic activity.
Main Methods:
- Synthesis of a series of substituted caffeate esters (compounds 12a-u) based on a lead compound (CDC 2).
- Electrophysiological assessment of TREK-1 channel modulation.
- Evaluation of in vivo antinociceptive activity using the acetic acid-induced writhing assay.
Main Results:
- Several novel caffeate ester analogs were synthesized and identified.
- The synthesized compounds demonstrated the ability to activate the TREK-1 channel.
- A series of compounds exhibited potent in vivo analgesic activity.
Conclusions:
- Substituted caffeate esters represent a promising class of novel TREK-1 activators.
- The identified compounds show potential as therapeutic agents for pain management.
- Targeting TREK-1 activation offers a viable strategy for developing new analgesics.
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