Learning-specific decrease in synaptosomal ATP diphosphohydrolase activity from hippocampus and entorhinal cortex of adult rats

C D Bonan; R Roesler; G S Pereira; A M Battastini; I Izquierdo; J J Sarkis

doi:10.1016/s0006-8993(99)02300-8

Learning-specific decrease in synaptosomal ATP diphosphohydrolase activity from hippocampus and entorhinal cortex of adult rats

Brain Res. 2000 Jan 31;854(1-2):253-6. doi: 10.1016/s0006-8993(99)02300-8.

Authors

C D Bonan¹, R Roesler, G S Pereira, A M Battastini, I Izquierdo, J J Sarkis

Affiliation

¹ Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.

PMID: 10784132
DOI: 10.1016/s0006-8993(99)02300-8

Abstract

Considering the involvement of extracellular ATP in the memory formation, we analyzed the effect of inhibitory avoidance training on ectonucleotidase activities in synaptosomes from hippocampus, entorhinal cortex and parietal cortex. ATP diphosphohydrolase activity presented a decrease (33%) in hippocampal synaptosomes of rats sacrificed 180 min after training. Our results also showed a decrease in synaptosomal ATP diphosphohydrolase (30% and 42% for ATP and ADP, respectively) in entorhinal cortex immediately after training. These findings suggest an integrated action of ATP diphosphohydrolase from hippocampus and entorhinal cortex in the formation of inhibitory avoidance memory.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Animals
Apyrase / metabolism*
Avoidance Learning / physiology*
Entorhinal Cortex / enzymology*
Hippocampus / enzymology*
Male
Rats
Rats, Wistar
Synaptosomes / enzymology*

Substances

Apyrase