[GABA metabolism and neuroactive amino acids in the rat brain in morphine withdrawal syndrome].

The changes in the neuroactive amino acid contents, GABA metabolism and TCA reactions have been studied in rat brain regions under experimental morphine withdrawal (MW). MW was developed by means of the cessation of morphine intraperitoneal injections 1 and 36 hours, 3 and 7 days after the course of morphine administration for 7 days. In cortex the significant increase in the contents of glutamate, glutamine, asparagine, and alanine was observed in remote terms of MW.

[Chronic morphine intoxication and metabolism of neuroactive amino acids in the rat brain].

The influence of chronic morphine intoxication (for 7, 14 and 21-days) has been studied on the contents of neuroactive amino acids (GABA, glutamate, glutamine, alanine, aspartate, glycine, taurine) and on the activities of their metabolizing enzymes (GABA-transaminase, succinic semialdehyde dehydrogenase, succinic dehydrogenase, alanine- and aspartate-aminotransferase) in the rat brain regions: cortex, brain stem and cerebellum. We detected the significant decrease of glutamate level and the enhancement of GABA and aspartate levels in cortex after long-term morphine administration. In brain stem the increase in the contents of GABA, glutamine and taurine was noted together with the tendency in attenuation of this effect when intoxication was prolonged.

[Metabolic disorders in drug addictions].

The metabolic disturbances caused by compulsory drug intake into animals and men were characterized. The probable mechanisms of these disturbances are discussed.