Memory strengthening by a real-life episode during reconsolidation: An outcome of water deprivation via brain angiotensin II

A considerable body of evidence reveals that consolidated memories, recalled by a reminder, enter into a new vulnerability phase during which they are susceptible to disruption again. Consistently, reconsolidation was shown by the amnesic effects induced by administration of consolidation blockers a...

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Autores principales:	Frenkel, L., Maldonado, H., Delorenzi, A.
Formato:	JOUR
Materias:	Chasmagnathus Crustacea Modulation Neuropeptide Reactivation angiotensin angiotensin 2 receptor amnesia animal experiment article behavior controlled study crab experience long term memory male memory consolidation nonhuman priority journal recall stimulus response water deprivation Angiotensin II Angiotensin II Type 1 Receptor Blockers Animals Behavior, Animal Brachyura Brain Conditioning (Psychology) Male Memory Photic Stimulation Retention (Psychology) Saralasin Time Factors Water Deprivation
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_0953816X_v22_n7_p1757_Frenkel
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_0953816X_v22_n7_p1757_Frenkel
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spelling	todo:paper_0953816X_v22_n7_p1757_Frenkel2023-10-03T15:51:16Z Memory strengthening by a real-life episode during reconsolidation: An outcome of water deprivation via brain angiotensin II Frenkel, L. Maldonado, H. Delorenzi, A. Chasmagnathus Crustacea Modulation Neuropeptide Reactivation angiotensin angiotensin 2 receptor amnesia animal experiment article behavior controlled study crab experience long term memory male memory consolidation nonhuman priority journal recall stimulus response water deprivation Angiotensin II Angiotensin II Type 1 Receptor Blockers Animals Behavior, Animal Brachyura Brain Conditioning (Psychology) Male Memory Photic Stimulation Retention (Psychology) Saralasin Time Factors Water Deprivation A considerable body of evidence reveals that consolidated memories, recalled by a reminder, enter into a new vulnerability phase during which they are susceptible to disruption again. Consistently, reconsolidation was shown by the amnesic effects induced by administration of consolidation blockers after memory labilization. To shed light on the functional value of reconsolidation, we explored whether an endogenous process activated during a concurrent real-life experience improved this memory phase. Reconsolidation of long-term contextual memory has been well documented in the crab Chasmagnathus. Previously we showed that angiotensin II facilitates memory consolidation. Moreover, water deprivation increases brain angiotensin and improves memory consolidation and retrieval through angiotensin II receptors. Here, we tested whether concurrent water deprivation improves reconsolidation via endogenous angiotensin and therefore strengthens memory. We show that memory reconsolidation, induced by training context reexposure, is facilitated by a concurrent episode of water deprivation, which induces a raise in endogenous brain angiotensin II. Positive modulation is expressed by full memory retention, despite a weak training, 24 or 72 but not 4 h after memory reactivation. This is the first evidence that memory can be positively modulated during reconsolidation through an identified endogenous process triggered during a real-life episode. We propose that the functional value for reconsolidation would be to make possible a change in memory strength by the influence of a concurrent experience. Reconsolidation improvement would lead to memory re-evaluation, not by altering memory content but by modifying the behaviour as an outcome of changing the hierarchy of the memories that control it. © Federation of European Neuroscience Societies. Fil:Frenkel, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Delorenzi, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0953816X_v22_n7_p1757_Frenkel
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Chasmagnathus Crustacea Modulation Neuropeptide Reactivation angiotensin angiotensin 2 receptor amnesia animal experiment article behavior controlled study crab experience long term memory male memory consolidation nonhuman priority journal recall stimulus response water deprivation Angiotensin II Angiotensin II Type 1 Receptor Blockers Animals Behavior, Animal Brachyura Brain Conditioning (Psychology) Male Memory Photic Stimulation Retention (Psychology) Saralasin Time Factors Water Deprivation
spellingShingle	Chasmagnathus Crustacea Modulation Neuropeptide Reactivation angiotensin angiotensin 2 receptor amnesia animal experiment article behavior controlled study crab experience long term memory male memory consolidation nonhuman priority journal recall stimulus response water deprivation Angiotensin II Angiotensin II Type 1 Receptor Blockers Animals Behavior, Animal Brachyura Brain Conditioning (Psychology) Male Memory Photic Stimulation Retention (Psychology) Saralasin Time Factors Water Deprivation Frenkel, L. Maldonado, H. Delorenzi, A. Memory strengthening by a real-life episode during reconsolidation: An outcome of water deprivation via brain angiotensin II
topic_facet	Chasmagnathus Crustacea Modulation Neuropeptide Reactivation angiotensin angiotensin 2 receptor amnesia animal experiment article behavior controlled study crab experience long term memory male memory consolidation nonhuman priority journal recall stimulus response water deprivation Angiotensin II Angiotensin II Type 1 Receptor Blockers Animals Behavior, Animal Brachyura Brain Conditioning (Psychology) Male Memory Photic Stimulation Retention (Psychology) Saralasin Time Factors Water Deprivation
description	A considerable body of evidence reveals that consolidated memories, recalled by a reminder, enter into a new vulnerability phase during which they are susceptible to disruption again. Consistently, reconsolidation was shown by the amnesic effects induced by administration of consolidation blockers after memory labilization. To shed light on the functional value of reconsolidation, we explored whether an endogenous process activated during a concurrent real-life experience improved this memory phase. Reconsolidation of long-term contextual memory has been well documented in the crab Chasmagnathus. Previously we showed that angiotensin II facilitates memory consolidation. Moreover, water deprivation increases brain angiotensin and improves memory consolidation and retrieval through angiotensin II receptors. Here, we tested whether concurrent water deprivation improves reconsolidation via endogenous angiotensin and therefore strengthens memory. We show that memory reconsolidation, induced by training context reexposure, is facilitated by a concurrent episode of water deprivation, which induces a raise in endogenous brain angiotensin II. Positive modulation is expressed by full memory retention, despite a weak training, 24 or 72 but not 4 h after memory reactivation. This is the first evidence that memory can be positively modulated during reconsolidation through an identified endogenous process triggered during a real-life episode. We propose that the functional value for reconsolidation would be to make possible a change in memory strength by the influence of a concurrent experience. Reconsolidation improvement would lead to memory re-evaluation, not by altering memory content but by modifying the behaviour as an outcome of changing the hierarchy of the memories that control it. © Federation of European Neuroscience Societies.
format	JOUR
author	Frenkel, L. Maldonado, H. Delorenzi, A.
author_facet	Frenkel, L. Maldonado, H. Delorenzi, A.
author_sort	Frenkel, L.
title	Memory strengthening by a real-life episode during reconsolidation: An outcome of water deprivation via brain angiotensin II
title_short	Memory strengthening by a real-life episode during reconsolidation: An outcome of water deprivation via brain angiotensin II
title_full	Memory strengthening by a real-life episode during reconsolidation: An outcome of water deprivation via brain angiotensin II
title_fullStr	Memory strengthening by a real-life episode during reconsolidation: An outcome of water deprivation via brain angiotensin II
title_full_unstemmed	Memory strengthening by a real-life episode during reconsolidation: An outcome of water deprivation via brain angiotensin II
title_sort	memory strengthening by a real-life episode during reconsolidation: an outcome of water deprivation via brain angiotensin ii
url	http://hdl.handle.net/20.500.12110/paper_0953816X_v22_n7_p1757_Frenkel
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Memory strengthening by a real-life episode during reconsolidation: An outcome of water deprivation via brain angiotensin II

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