Novel Benzo[b]quinolizinium Cations as Uncompetitive N-Methyl-D-aspartic Acid (NMDA) Antagonists: The Relationship between log D and Agonist Independent (Closed) NMDA Channel Block
作者:William G. Earley、Virendra Kumar、John P. Mallamo、Chakrapani Subramanyam、John A. Dority、Matthew S. Miller、Diane L. DeHaven-Hudkins、Lisa D. Aimone、Michael D. Kelly、Brian Ault
DOI:10.1021/jm00018a018
日期:1995.9
A series of permanently charged benzo[b]quinolizinium cations having lower lipophilicity than MK-801 or phencyclidine (PCP) were synthesized. Data relating agonist independent block of N-methyl-D-aspartic acid (NMDA) ion channels to log D are described.; Closed channel access is predicted to result in a more noncompetitive profile of antagonism compared to selective open channel blockers, which are uncompetitive inhibitors. Reduced closed channel block may underlie the absence of PCP or MK-801-like behavioral side effects observed for benzo[b]quinolizinium cations.
Identification, Synthesis, and Characterization of a Unique Class of N-Methyl-D-aspartate Antagonists. The 6,11-Ethanobenzo[b]quinolizinium Cation
作者:John P. Mallamo、William G. Earley、Virendra Kumar、Chakrapani Subramanyam、John A. Jr. Dority、Matthew S. Miller、Diane L. DeHaven-Hudkins、Brian Ault、John L. Herrmann
DOI:10.1021/jm00052a003
日期:1994.12
A series of novel N-methyl-D-aspartate antagonists acting at the phencyclidine site has been identified. Compound 2 has a Ki = 8 +/- 1 nM (vs [3H]thienylcyclidine, [3H]TCP) as a mixture of enantiomers. Resolution and further testing indicate that (-)-2, Ki = 4 +/- 0.7 nM, is a potent and selective TCP site ligand with neuroprotective activity in cultured neurons in the presence of excitotoxic concentrations