Tacrine is a indirect cholinergic agonist and centrally acting anticholinesterase. Tacrine hydrochloride hydrate is an inhibitor of acetyl (AChE) and butyryl-cholinestrase (BChE) with IC50s of 31 nM and 25.6 nM, respectively.
6,9-Dichloro-1,2,3,4-tetrahydroacridine is a synthetic intermediate in the synthesis of tacrine-based acetylcholinesterase (AChE) inhibitors.1It is also an intermediate in the synthesis of multifunctional tacrine hybrids that possess radical scavenging, amyloid-β aggregation inhibitory, and or β-secretase 1 (BACE1) inhibitory activities in addition to their activity as AChE inhibitors.2,3 1.Recanatini, M., Cavalli, A., Belluti, F., et al.SAR of 9-amino-1,2,3,4-tetrahydroacridine-based acetylcholinesterase inhibitors: Synthesis, enzyme inhibitory activity, QSAR, and structure-based CoMFA of tacrine analoguesJ. Med. Chem.43(10)2007-2018(2000) 2.Digiacomo, M., Chen, Z., Wang, S., et al.Synthesis and pharmacological evaluation of multifunctional tacrine derivatives against several disease pathways of ADBioorg. Med. Chem. Lett.25(4)807-810(2015) 3.Li, S.Y., Jiang, N., Xie, S.S., et al.Design, synthesis and evaluation of novel tacrine-rhein hybrids as multifunctional agents for the treatment of Alzheimer's diseaseOrg. Biomol. Chem.12(5)801-814(2014)
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
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.
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.