New Highly Potent NLRP3 Inhibitors: Furanochalcone Velutone F Analogues

Area of Science:

• Medicinal Chemistry
• Immunology
• Pharmacology

Background:

• The NLRP3 inflammasome is a key target for treating inflammatory diseases.
• Velutone F, a natural NLRP3 inhibitor, has limitations including low abundance and complex synthesis.
• Structural optimization of velutone F is needed to develop more effective inhibitors.

Purpose of the Study:

• To synthesize and evaluate novel NLRP3 inhibitors based on velutone F.
• To identify a potent and synthetically accessible NLRP3 inhibitor for therapeutic development.

Main Methods:

• Structural modification of velutone F to create new compounds.
• In vitro assessment of inhibitory activity against NLRP3 inflammasome.
• In vivo evaluation in a mouse model of peritonitis.

Main Results:

• Compound 14c showed significant NLRP3 inhibition (IC50 = 251.1 nM), outperforming velutone F.
• Compound 14c synthesis is straightforward and scalable.
• 14c suppressed inflammasome activation by reducing ASC speck formation.
• In vivo, 14c decreased neutrophil influx and IL-1β levels in a mouse model.

Conclusions:

• Compound 14c is a potent NLRP3 inhibitor with a favorable synthetic profile.
• 14c represents a promising lead compound for developing new anti-inflammatory drugs targeting the NLRP3 inflammasome.