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      [Low dose of disulfiram and l-dopa evoked synergistic modification in behavior of Wistar and WAG/Rij rats].

      Zhurnal vyssheĭ nervnoĭ deiatelnosti imeni I P Pavlova
      Affect, drug effects, Alcohol Deterrents, administration & dosage, pharmacology, Animals, Conditioning (Psychology), Disulfiram, Dopamine Agonists, Dose-Response Relationship, Drug, Drug Administration Schedule, Levodopa, Rats, Rats, Inbred Strains, Rats, Wistar, Retention (Psychology)

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          Abstract

          Comparative analysis of behaviors of two rat strains, Wistar and WAG/Rij, was performed. No behavioral differences between Wistar and WAG/Rij were found in the emotional resonance test. Disulfiram injection produced similar effects in both rat strains. Animals of the first group (with slow acquisition of emotional resonance reaction) transformed into the animals of the second group (with fast acquisition). Passive avoidance conditioning was successfully reproduced in Wistar and was significantly impaired in WAG/Rij. A low dose of disulfiram injected before or immediately after conditioning substantially improved the reproduction to a greater extent in WAG/Rij than Wistar strains thus eliminating in interstrain differences. Active avoidance conditioning was more successful in WAG/Rij than in Wistar rats However, on the next day conditioning in WAG/Rij was substantially impaired. Administration of the low dose of disulfiram or L-DOPA prior to conditioning impaired the acquisition but improved the reproduction on the following day in both strains, but disulfiram injection after conditioning improved conditioning in WAG/Rij to a greater extent than in Wistar. Thus, the pharmacologic enhancement of the reward system substantially changed animal behavior and improved memory consolidation.

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