Rosmarinic acid is a naturally-occurring phenolic compound with antioxidant and anti-inflammatory properties. This compound inhibits lipid peroxidation of rat liver microsomes by 90% at a concentration of 25 µg/ml.1 Rosmarinic acid suppresses endotoxin-induced activation of complement and concomitant formation of prostacyclin.2,3 Formation of 5-HETE and LTB4 from human PMNL is inhibited by rosmarinic acid at concentrations of 10-5 to 10-3 M.4
1
Liu, G., Zhang, T., Wang, B., et al. Protective action of seven natural phenolic compounds against peroxidative damage to biomembranes. Biochem Pharmacol43147-152(1992).
2
Bult, H., Herman, A.G., and Rampart, M. Modification of endotoxin-induced haemodynamic and haematological changes in the rabbit by methylprednisolone, F(ab')2 fragments and rosmarinic acid. Br J Pharmacol84317-327(1985).
3
Rampart, M., Beetens, J.R., Bult, H., et al. Complement-dependent stimulation of prostacyclin biosynthesis: Inhibition by rosmarinic acid. Biochem Pharmacol351397-1400(1986).
4
Kimura, Y., Okuda, H., Okuda, T., et al. Studies on the activities of tannins and related compounds, X. Effects of caffeetannins and related compounds on arachidonate metabolism in human polymorphonuclear leukocytes. J Nat Prod50392-399(1987).
Bult, H., Herman, A.G., and Rampart, M. Modification of endotoxin-induced haemodynamic and haematological changes in the rabbit by methylprednisolone, F(ab')2 fragments and rosmarinic acid. Br J Pharmacol84317-327(1985).
Rampart, M., Beetens, J.R., Bult, H., et al. Complement-dependent stimulation of prostacyclin biosynthesis: Inhibition by rosmarinic acid. Biochem Pharmacol351397-1400(1986).
Kimura, Y., Okuda, H., Okuda, T., et al. Studies on the activities of tannins and related compounds, X. Effects of caffeetannins and related compounds on arachidonate metabolism in human polymorphonuclear leukocytes. J Nat Prod50392-399(1987).
Liu, G., Zhang, T., Wang, B., et al. Protective action of seven natural phenolic compounds against peroxidative damage to biomembranes. Biochem Pharmacol43147-152(1992).