Richard M. Morley

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(2S*,3R*)-1-(biphenyl-4-carbonyl)piperazine-2,3-dicarboxylic acid (PBPD) is a moderate affinity, competitive N-methyl-d-aspartate (NMDA) receptor antagonist with an atypical pattern of selectivity among NMDA receptor 2 subunit (NR2) subunits. We now describe the activity of several derivatives of PBPD tested at both rat brain NMDA receptors using(More)
The widely-used N-methyl-D-aspartate (NMDA) receptor antagonists (R)-4-(3-phosphonopropyl) piperazine-2-carboxylic acid ((R)-CPP) and (R)-2-amino-7-phosphonoheptanoate ((R)-AP7) are frequently used as general NMDA receptor antagonists and assumed not to display significant selectivity among NMDA receptor NR2 subunits. However, electrophysiological studies(More)
The binding site for competitive NMDA receptor antagonists is on the NR2 subunit, of which there are four types (NR2A-D). Typical antagonists such as (R)-AP5 have a subunit selectivity of NR2A > NR2B > NR2C > NR2D. The competitive NMDA receptor antagonist (2R,3S)-(1-biphenylyl-4-carbonyl)piperazine-2,3-dicarboxylic acid (PBPD, 16b) displays an unusual(More)
N-Methyl-d-aspartate (NMDA) receptor antagonists that are highly selective for specific NMDA receptor 2 (NR2) subunits have several potential therapeutic applications; however, to date, only NR2B-selective antagonists have been described. Whereas most glutamate binding site antagonists display a common pattern of NR2 selectivity, NR2A > NR2B > NR2C > NR2D(More)
The natural product willardiine (8) is an AMPA receptor agonist while 5-iodowillardiine (10) is a selective kainate receptor agonist. In an attempt to produce antagonists of kainate and AMPA receptors analogues of willardiine with substituents at the N3 position of the uracil ring were synthesized. The N3-4-carboxybenzyl substituted analogue (38c) was found(More)
The resolved X-ray crystal structures of the glutamate-binding domain (S1/S2 domains) of the GluR2 and NR1 glutamate receptor subunits were used to model the homologous regions of the N-methyl-D-aspartate (NMDA) receptor's NR2 subunits. To test the predictive value of these models, all four stereoisomers of the antagonist 1-(phenanthren-2-carbonyl)(More)
Competitive N-methyl-d-aspartate receptor (NMDAR) antagonists bind to the GluN2 subunit, of which there are four types (GluN2A-D). We report that some N(1)-substituted derivatives of cis-piperazine-2,3-dicarboxylic acid display improved relative affinity for GluN2C and GluN2D versus GluN2A and GluN2B. These derivatives also display subtype selectivity among(More)
FACS analysis and [14C]-taurine efflux were used to determine whether activation of the volume-sensitive organic osmolyte/anion channel plays a role in cell cycle progression. This was achieved by examining the effects of a collection of (i) H(1) antagonists and tricyclic antidepressants with a known inhibitory effect on cell cycle progression, and (ii)(More)
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