Primary cultures of rat cerebellar cells were pretrcated with various dosages of pentobarbital before the addition of kainic acid or N-methyl-D-aspartic acid in order to assess effects of this drug on the enhancement of cyclic guanosine-3',5'-phosphate (cyclic GMP) mediated by these excitatory agonists. Pentobarbital significantly suppressed kainic acid-induced increases in this cyclic nucleotide at concentrations as low as 5 μM but was only effective in suppressing the N-methyl-D-aspartic acid enhancement at dosages of 100 μM or greater. These data suggest that this barbiturate is a more effective depressant of the stimulatory effects of kainic acid as compared to N-mcthyl-D-aspartic acid.
- Dicarboxylic amino acids
- Kainic acid
- NMDA (N-methyl-D-aspartic acid)
- Quisqualic acid
ASJC Scopus subject areas