Title : NMDA receptor activation by residual glutamate in glutamine preparations: a cautionary note regarding weak NMDA receptor agonists.

Pub. Date : 1989 Aug 21

PMID : 2570626






4 Functional Relationships(s)
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1 NMDA receptor activation by residual glutamate in glutamine preparations: a cautionary note regarding weak NMDA receptor agonists. Glutamic Acid glutamate ionotropic receptor NMDA type subunit 1 L homeolog Xenopus laevis
2 However, NMDA receptor activation induced by glutamine probably represented activity of residual glutamate because: (a) recrystallization of glutamine reduced residual glutamate levels (measured by HPLC analysis) and NMDA receptor activation by comparable amounts; and (b) glutamate at concentrations close to those predicted to be present in glutamine preparations elicited currents of similar amplitudes. Glutamic Acid glutamate ionotropic receptor NMDA type subunit 1 L homeolog Xenopus laevis
3 However, NMDA receptor activation induced by glutamine probably represented activity of residual glutamate because: (a) recrystallization of glutamine reduced residual glutamate levels (measured by HPLC analysis) and NMDA receptor activation by comparable amounts; and (b) glutamate at concentrations close to those predicted to be present in glutamine preparations elicited currents of similar amplitudes. Glutamic Acid glutamate ionotropic receptor NMDA type subunit 1 L homeolog Xenopus laevis
4 Our data indicate that residual glutamate at levels of less than 0.05% are sufficient to confound studies of weak NMDA receptor agonists. Glutamic Acid glutamate ionotropic receptor NMDA type subunit 1 L homeolog Xenopus laevis