Research Area: Neurological Disease Biological Activity: (-)-Huperzine A is an Acetylcholinesterase inhibitor and NMDA receptor antagonist with an IC50 of 126 μM for NMDA-induced current. Huperzine A, is a naturally occurring sesquiterpene alkaloid compound found in the plant firmoss Huperzia serrata. The IC(50) values of huperzine A were neither altered by changing the concentrations of glycine (2-0.2 μM) and pH (7.4-6.7) in the external solution, nor by addition of Zn(2+) (5 μM) and dithiothreitol (5 mM) to the external solution. [1][2]References on (-)-Huperzine A[1] http://en.wikipedia.org/wiki/Huperzine_A, , [2] Neuroscience., 2001, 105(3):663-9. |