Boldine is an aporphine isoquinoline alkaloid extracted from the root of Litsea cubeba and also possesses these properties, including antioxidant, anti-inflammatory and cytoprotective effects. Boldine suppresses osteoclastogenesis, improves bone destruction by down-regulating the OPG/RANKL/RANK signal pathway and may be a potential therapeutic agent for rheumatoid arthritis[1].
References:
[1]. Zhao H , et al. Boldine isolated from Litsea cubeba inhibits bone resorption by suppressing the osteoclast differentiation in collagen-induced arthritis. Int Immunopharmacol. 2017 Oct;51:114-123.