cryogenine

Cryogenine is an alkaloid originally isolated from H. salicifolia that has anti-inflammatory activity.1 It inhibits prostaglandin synthetase (IC50 = 424 μM). Cryogenine (100 mg kg per day, p.o.) reduces paw edema and the mean arthritic index in a rat model of adjuvant-induced polyarthritis.2 |1. Lema, W.J., Blankenship, J.W., and Malone, M.H. Prostaglandin synthetase inhibition by alkaloids of Heimia salicifolia. J. Ethnopharmacol. 15(2), 161-167 (1986).|2. Kosersky, D.S., Brown, J.K., and Malone, M.H. Effects of cryogenine on adjuvant-induced arthritis and serum turbidity in rats. J. Pharm. Sci. 62(12), 1965-1971 (1973).