Increased Synaptic ATP Release and CD73-Mediated Formation of Extracellular Adenosine in the Control of Behavioral and Electrophysiological Modifications Caused by Chronic Stress.

Autor:	Dias L; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.; FMUC─Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal., Pochmann D; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal., Lemos C; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal., Silva HB; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal., Real JI; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal., Gonçalves FQ; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal., Rial D; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal., Gonçalves N; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal., Simões AP; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal., Ferreira SG; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal., Agostinho P; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.; FMUC─Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal., Cunha RA; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.; FMUC─Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal., Tomé AR; CNC─Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.; Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, 3004-517 Coimbra, Portugal.
Jazyk:	angličtina
Zdroj:	ACS chemical neuroscience [ACS Chem Neurosci] 2023 Apr 05; Vol. 14 (7), pp. 1299-1309. Date of Electronic Publication: 2023 Mar 07.
DOI:	10.1021/acschemneuro.2c00810
Abstrakt:	Increased ATP release and its extracellular catabolism through CD73 (ecto-5'-nucleotidase) lead to the overactivation of adenosine A 2A receptors (A 2A R), which occurs in different brain disorders. A 2A R blockade blunts mood and memory dysfunction caused by repeated stress, but it is unknown if increased ATP release coupled to CD73-mediated formation of extracellular adenosine is responsible for A 2A R overactivation upon repeated stress. This was now investigated in adult rats subject to repeated stress for 14 consecutive days. Frontocortical and hippocampal synaptosomes from stressed rats displayed an increased release of ATP upon depolarization, coupled to an increased density of vesicular nucleotide transporters and of CD73. The continuous intracerebroventricular delivery of the CD73 inhibitor α,β-methylene ADP (AOPCP, 100 μM) during restraint stress attenuated mood and memory dysfunction. Slice electrophysiological recordings showed that restraint stress decreased long-term potentiation both in prefrontocortical layer II/III-layer V synapses and in hippocampal Schaffer fibers-CA1 pyramid synapses, which was prevented by AOPCP, an effect occluded by adenosine deaminase and by the A 2A R antagonist SCH58261. These results indicate that increased synaptic ATP release coupled to CD73-mediated formation of extracellular adenosine contributes to mood and memory dysfunction triggered by repeated restraint stress. This prompts considering interventions decreasing ATP release and CD73 activity as novel strategies to mitigate the burden of repeated stress.
Databáze:	MEDLINE
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