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Abstract Title:

Paracetamol - Effect of early exposure on neurotransmission, spatial memory and motor performance in rats.

Abstract Source:

Behav Brain Res. 2017 Apr 14 ;323:162-171. Epub 2017 Feb 3. PMID: 28163096

Abstract Author(s):

Kamilla Blecharz-Klin, Agnieszka Piechal, Katarzyna Jawna-Zboińska, Justyna Pyrzanowska, Adriana Wawer, Ilona Joniec-Maciejak, Ewa Widy-Tyszkiewicz

Article Affiliation:

Kamilla Blecharz-Klin

Abstract:

In the present study we examined the effect of prenatal and early life paracetamol exposure on neurotransmission and its behavioural manifestation in rat male pups. In order to assess the ability of spatial learning and memory consolidation and the level of physical and exploratory activity we conducted a series of behavioural tests: Staircase Test, Hole Board Test and Water Maze. The concentrations of monoamines, metabolites and amino acids were determined using High Performance Liquid Chromatography in the prefrontal cortex, hippocampus and striatum. The effect on spatial memory and exploratory behaviour was most pronounced in animals treated with the lower dose of paracetamol. In this group we have observed a much lower motor activity and decreased head-dipping behaviour. Simultaneously, the number of crossings in the Water Maze under the previous platform position during the probe trial was significantly higher in rats treated with paracetamol at the dose of 5mg/kg. There was also a preference for a new location of a platform to the original position of the platform in the reversal probe trial of this group. These results indicate that early paracetamol exposure produces major changes in serotonergic and dopaminergic neurotransmission in the prefrontal cortex and striatum. At the same time, administration of the drug in early life results in the spectacular change in the amino acid level, in particular in the hippocampus and cortex. This has been reflected in the behaviour of animals in the Water Maze and Hole Board Test (without any noticeable impact on the Staircase Test).

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