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Effects of inhibitory avoidance training and/or isolated foot-shock on ectonucleotidase activities in synaptosomes of the anterior and posterior cingulate cortex and the medial precentral area of adult rats

Pereira, Grace Schenatto ; Mello e Souza, Tadeu ; Battastini, Ana Maria Oliveira ; Izquierdo, Iván ; Sarkis, João José Freitas ; Bonan, Carla Denise

Behavioural brain research, 2002-01, Vol.128 (2), p.121-127 [Periódico revisado por pares]

Shannon: Elsevier B.V

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Título:
Effects of inhibitory avoidance training and/or isolated foot-shock on ectonucleotidase activities in synaptosomes of the anterior and posterior cingulate cortex and the medial precentral area of adult rats
Autor: Pereira, Grace Schenatto ; Mello e Souza, Tadeu ; Battastini, Ana Maria Oliveira ; Izquierdo, Iván ; Sarkis, João José Freitas ; Bonan, Carla Denise
Assuntos: Adenosine - biosynthesis ; Adenosine - physiology ; Adenosine Diphosphate - metabolism ; Adenosine Triphosphate - metabolism ; Animals ; Avoidance Learning - physiology ; Biological and medical sciences ; Cerebral Cortex - enzymology ; Cingulate cortex ; ectonucleotidase ; Ectonucleotidases ; Electroshock ; Hydrolysis ; Inhibitory avoidance ; Male ; Medial precentral area ; Memory ; Memory - physiology ; Nucleotidases - metabolism ; Prefrontal cortex ; Prefrontal Cortex - enzymology ; Rats ; Rats, Wistar ; Stress ; Stress, Psychological - enzymology ; Stress, Psychological - psychology ; Subcellular Fractions - enzymology ; Synaptosomes - enzymology
É parte de: Behavioural brain research, 2002-01, Vol.128 (2), p.121-127
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Descrição: Compelling evidence has indicated the involvement of extracellular ATP and adenosine in the mechanisms of synaptic plasticity and memory formation. In the present study, adult rats were trained in a step-down inhibitory avoidance task (IA) or submitted to isolated foot-shock (IF) (0.4 mA) before measuring ectonucleotidase activities in the synaptosomes of the anterior and posterior cingulate cortex (AC and PC, respectively) and the medial precentral area (Fr2). IA increased ATP and ADP hydrolysis immediately after training in the synaptosomes of PC and AC, respectively, ( P<0.05). Foot-shock (independent of occurring during IA or IF) increased ATP hydrolysis in synaptosomes of AC and Fr2 immediately after application and decreased AIP hydrolysis in AC 90 min after application ( P<0.05). Foot-shock (independent of occurring during IA or IF) increased ATP hydrolysis in PC immediately and 90 min after application, and in Fr2, but only immediately after application ( P<0.05). These results suggest that the ectonucleotidase pathway responds to a mild foot-shock in AC, PC and Fr2 and may be involved in memory consolidation of step-down inhibitory avoidance in the cingulate cortex.
Editor: Shannon: Elsevier B.V
Idioma: Inglês

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Effects of inhibitory avoidance training and/or isolated foot-shock on ectonucleotidase activities in synaptosomes of the anterior and posterior cingulate cortex and the medial precentral area of adult rats

Pereira, Grace Schenatto ; Mello e Souza, Tadeu ; Battastini, Ana Maria Oliveira ; Izquierdo, Iván ; Sarkis, João José Freitas ; Bonan, Carla Denise

Shannon: Elsevier B.V

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