Inhibitory avoidance learning inhibits ectonucleotidases activities in hippocampal synaptosomes of adult rats.

Abstract:

:Several lines of evidence indicate that ATP may play an important role in Long-Term Potentiation. In this investigation we evaluated the effect of a memory task (step-down inhibitory avoidance) on the synaptosomal ecto-enzymes (ATP diphosphohydrolase and 5'-nucleotidase) involved in the degradation of ATP to adenosine. After the training session, a decrease in the ATPase (40%) and ADPase (29%) activities of ATP diphosphohydrolase as well as was a decrease in 5'-nucleotidase activity (31%) was observed in hippocampal synaptosomes of rats trained and killed immediately after training. In synaptosomes of rats killed 30 minutes after training, a decrease in ATPase activity (28%) was observed. In the test session, no significant changes were observed in the enzyme activities studied. These results provide new information about the activity of ecto-enzymes involved in nucleotide degradation and their possible participation in mechanisms of acquisition and modulation of memory processing.

journal_name

Neurochem Res

journal_title

Neurochemical research

authors

Bonan CD,Dias MM,Battastini AM,Dias RD,Sarkis JJ

doi

10.1023/a:1021084422228

subject

Has Abstract

pub_date

1998-07-01 00:00:00

pages

977-82

issue

7

eissn

0364-3190

issn

1573-6903

journal_volume

23

pub_type

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