González-Cofrade, LauraOramas-Royo, SandraCuadrado, IreneAmesty, ÁngelHortelano, SonsolesEstévez-Braun, Anade Las Heras, Beatriz2024-01-252024-01-252020-07-24J Nat Prod. 2020 Jul 24;83(7):2155-2164.http://hdl.handle.net/20.500.12105/17375The NLRP3 inflammasome plays a critical role in inflammation-mediated human diseases and represents a promising drug target for novel anti-inflammatory therapies. Hispanolone is a labdane diterpenoid isolated from the aerial parts of Ballota species. This diterpenoid and some derivatives have demonstrated anti-inflammatory effects in classical inflammatory pathways. In the present study, a series of dehydrohispanolone derivatives (1-19) was synthesized, and their anti-inflammatory activities toward NLRP3 inflammasome activation were evaluated. The structures of the dehydrohispanolone analogues produced were elucidated by NMR spectroscopy and mass spectrometry. Four derivatives significantly inhibited IL-1β secretion, with 15 and 18 being the most active (IC50 = 18.7 and 13.8 μM, respectively). Analysis of IL-1β and caspase-1 expression revealed that the new diterpenoids 15 and 18 are selective inhibitors of the NLRP3 inflammasome, reinforcing the previously demonstrated anti-inflammatory properties of hispanolone derivatives.engSMURhttp://creativecommons.org/licenses/by/4.0/AnimalsDiterpenesHumansInflammasomesInflammationMolecular StructureNLR Family, Pyrin Domain-Containing 3 ProteinStructure-Activity RelationshipAtribución 4.0 Internacional325845758372155-216410.1021/acs.jnatprod.0c002001520-6025Journal of natural productsopen access