Summary
When introduced intracerebroventricularly, quinolinic acid appeared to be the only kynurenine metabolite among those tested (L- and DL-kynurenine sulfate, kynurenic and nicotinic acids, nicotinamide) which induced locomotor excitement and clonic scizures in rats; in high dosage all exhibited convulsant action in mice. L-Kynurenine sulfate (500μg) induced continuous rotation in rats around a longitudinal axis in one or other direction. It also potentiated the convulsant effect of strychnine sulfate and caffeine. Neither the excitatory amino acids, L-glutamic and L-aspartic acids nor the inhibitory amino acids, GABA, glycine and taurine induced excitement or scizures in rats but did in mice. In rats, GABA, glycine and taurine induced sedation, side position and discoordination. The convulsants, strychnine sulfate and pentylenetetrazole, induced scizures both in rats and mice. Differences between species may derive from the better access of intracerebroventricularly administered drugs to mouse hippocampus. Thus mice may be preferable for studies of this type on excitatory amino acids (including kynurenine pathway metabolites) and rats for those on inhibitory amino acids.
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References
Bureš, J., Petráň, M., Zachar, J.: Electrophysiological methods of investigation. Moscow: Izd. Inostrannaya literatura. 1962 (transl. into Russian).
Feldberg, W.: A pharmacological approach to the brain from its inner and outer surface. Leningrad: Izd. Nauka. 1971 (transl. into Russian).
Foldes, A., Costa, E.: Relationship of brain monoamines and locomotor activity in rats. Biochem. Pharmacol.24, 1617–1621 (1975).
Georgiev, V. P.: Mediator amino acids in the central nervous system. Sofia: Bulg. Acad. Sci. Publ. 1980 (in Bulgarian).
Glebov, R. N., Kryzanovski, G. N.: Functional biochemistry of synapses. Moscow: Izd. Medicina. 1978 (in Russian).
Gusel, W. A., Mikhailov, I. B.: Effect of tryptophan metabolites on activity of the epileptic focus in the frog hippocampus. J. Neural Transm.47, 41–52 (1980).
Kleinrok, A., Tomaszewski, A., Zaczkiewicz, A.: The effects of taurine on acetylcholine (ACh) content and synthesis in rat brain structures, Abstr. 7th Congr. Polish Pharmacol. Soc., Posnan, 1980, p. 33.
König, J., Klippel, R. A.: The rat brain. A stereotaxic atlas of the forebrain and lower parts of the brain stem. Baltimore: Williams and Wilkins Co. 1963.
Lapin, I. P.: Kynurenines and seizures. Epilepsia22, 257–265 (1981).
Marcucci, F., Airoldi, M. L., Mussini, E., Garattini, S.: Brain levels of metrazol determined with a new gas chromatographic procedure. Eur. J. Pharmacol.16, 219 (1971).
Mikhailov, I. B.: Modification of activity of epileptogenic focus in the rat hippocampus induced by major tryptophan metabolites. Farmakol. i Toksikol. (Moscow)44, 143–146 (1981) (in Russian).
Ryzov, I. V.: Potentiation of the convuisant effect of strychnine by kynurenines injected into brain ventricles in frogs. Bull. exp. Biol. i Med. (Moscow)19, 572–574 (1980) (in Russian).
Slotnick, B. M., Leonard, C. M.: A stereotaxic atlas of the albino mouse forebrain. Rockville: U.S. Dept. of Health, Education, Welfare. 1975.
Tomaszewski, A., Zaczkiewicz, A., Kleinrok, A.: The effects of glycine on acetylcholine metabolism in rat brain. Abstr. 7th Congr. Polish Pharmacol. Soc. Poznan, 1980, pp. 74–75.
Vaneček, J., Krebs, V., Scheer, E., Bieleke, T.: A note on an apparatus for intracerebral injections in conscious mice. J. Am. Pharm. Ass.49, 178 (1960).
Yonekawa, W. D., Kupferberg, H. J., Woodbury, D. M.: Relationship between pentylenetetrazol-induced scizures and brain pentylenetetrazol levels in mice. J. Pharmacol. exp. Ther.214, 589–593 (1980).
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Lapin, I.P., Prakhie, I.B. & Kiseleva, I.P. Excitatory effects of kynurenine and its metabolites, amino acids and convulsants administered into brain ventricles: Differences between rats and mice. J. Neural Transmission 54, 229–238 (1982). https://doi.org/10.1007/BF01254932
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DOI: https://doi.org/10.1007/BF01254932