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Dehydrocurdione, a zedoary-derived sesquiterpene, induces heme oxygenase (HO)-1, an antioxidative enzyme, in RAW 264.7 macrophages. Dehydrocurdione interacts with Keap1, resulting in Nrf2 translocation followed by activation of the HO-1 E2 enhancer. Dehydrocurdione suppresses lipopolysaccharide-induced NO release, a marker of inflammation. Anti-inflammatory activity[1][2].

[1] Ohnishi M, et al. Curcuma sp.-derived dehydrocurdione induces heme oxygenase-1 through a Michael reaction between its α, β-unsaturated carbonyl and Keap1. Phytother Res. 2018;32(5):892-897. DOI:10.1002/ptr.6028
[2] Yoshioka T, et al. Antiinflammatory potency of dehydrocurdione, a zedoary-derived sesquiterpene. Inflamm Res. 1998;47(12):476-481. DOI:10.1007/s000110050361