tacrine

Tacrine (CS 12602) is an indirect cholinergic agonist and centrally acting anticholinesterase. It is approved for the treatment of Alzheimer's disease.

1. Picfeltarraenin IA (Picfeltarraenin A), IB, IV, X, XI are stronger AChE inhibitions than the known AChE inhibitor Tacrine.

Picfeltarraenin X shows stronger AChE inhibition than the known AChE inhibitor Tacrine.

1,3,5,6-Tetrahydroxyxanthone shows moderate hepatoprotective activity with EC(50) values of 160.2 +/- 0.6 microM against tacrine-induced cytotoxicity in HepG2 cells. It can inhibit angiotensin-I-converting-enzyme activity in a dose-dependent manner.

Onitin shows super-oxide and DPPH free radical scavenging effects.It also exhibits hepatoprotective activity on tacrine-induced cytotoxicity in human liver-derived Hep G2 cells.

Torilin and torilolone show hepatoprotective effects on tacrine-induced cytotoxicity in human liver-derived Hep G2 cells,the EC50 values are 20.6 +/- 1.86 and 3.6 +/- 0.1 microM, respectively; and silybin as a positive control shows an EC50 value of 69.0