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Gonzalez H, Bloise L, Maza FJ, Molina VA, Delorenzi A. Memory built in conjunction with a stressor is privileged: Reconsolidation-resistant memories in the crab Neohelice. Brain Res Bull 2020; 157:108-118. [PMID: 32017969 DOI: 10.1016/j.brainresbull.2020.01.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 01/14/2020] [Accepted: 01/21/2020] [Indexed: 11/27/2022]
Abstract
The dynamics of memory processes are conserved throughout evolution, a feature based on the hypothesis of a common origin of the high-order memory centers in bilateral animals. Reconsolidation is just one example. The possibility to interfere with long-term memory expression during reconsolidation has been proposed as potentially useful in clinical application to treat traumatic memories. However, several pieces of evidence in rodents show that either robust fear memories or stressful events applied before acquisition promote reconsolidation-resistant memories, i.e., memories that are resistant to the interfering effect of drugs on memory reconsolidation. Conceivably, the generation of these reconsolidation-resistant fear memories also occurs in humans. Is the induction of reconsolidation-resistant memories part of the dynamics of memory processes conserved throughout evolution? In the semiterrestrial crab Neohelice granulata, memory reconsolidation is triggered by a short reminder without reinforcement. Here, we show that an increase in the salience of the aversive stimulus augmented the memory strength; nonetheless, the protein synthesis inhibitor cycloheximide still disrupted the reconsolidation process. However, crabs stressed by a water-deprivation episode before a strong training session built up a memory that was now reconsolidation-resistant. We tested whether these reconsolidation-resistant effects can be challenged by changing parametric conditions of memory-reminder sessions; multiple memory reactivations without reinforcement were not able to trigger the labilization-reconsolidation of this resistant memory. Overall, the present findings suggest that generation of reconsolidation-resistant memories can be another part of the dynamics of memory processes conserved throughout evolution that protects privileged information from change.
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Affiliation(s)
- Heidi Gonzalez
- Departamento de Fisiologíay Biología Molecular y Celular, IFIByNE-CONICET, FCEyN, Universidad de Buenos Aires, Ciudad Universitaria C1428EHA, Argentina.
| | - Leonardo Bloise
- Departamento de Fisiologíay Biología Molecular y Celular, IFIByNE-CONICET, FCEyN, Universidad de Buenos Aires, Ciudad Universitaria C1428EHA, Argentina.
| | - Francisco J Maza
- Departamento de Fisiologíay Biología Molecular y Celular, IFIByNE-CONICET, FCEyN, Universidad de Buenos Aires, Ciudad Universitaria C1428EHA, Argentina.
| | - Víctor A Molina
- Departamento de Farmacología, Facultad de Ciencias Químicas, IFEC-CONICET-Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, Argentina.
| | - Alejandro Delorenzi
- Departamento de Fisiologíay Biología Molecular y Celular, IFIByNE-CONICET, FCEyN, Universidad de Buenos Aires, Ciudad Universitaria C1428EHA, Argentina.
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Tashev R, Ivanova M. Involvement of hippocampal angiotensin 1 receptors in anxiety-like behaviour of olfactory bulbectomized rats. Pharmacol Rep 2018; 70:847-852. [DOI: 10.1016/j.pharep.2018.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 03/03/2018] [Accepted: 03/07/2018] [Indexed: 10/17/2022]
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Smith JA, Pati D, Wang L, de Kloet AD, Frazier CJ, Krause EG. Hydration and beyond: neuropeptides as mediators of hydromineral balance, anxiety and stress-responsiveness. Front Syst Neurosci 2015; 9:46. [PMID: 25873866 PMCID: PMC4379895 DOI: 10.3389/fnsys.2015.00046] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 03/06/2015] [Indexed: 11/13/2022] Open
Abstract
Challenges to body fluid homeostasis can have a profound impact on hypothalamic regulation of stress responsiveness. Deficiencies in blood volume or sodium concentration leads to the generation of neural and humoral signals relayed through the hindbrain and circumventricular organs that apprise the paraventricular nucleus of the hypothalamus (PVH) of hydromineral imbalance. Collectively, these neural and humoral signals converge onto PVH neurons, including those that express corticotrophin-releasing factor (CRF), oxytocin (OT), and vasopressin, to influence their activity and initiate compensatory responses that alleviate hydromineral imbalance. Interestingly, following exposure to perceived threats to homeostasis, select limbic brain regions mediate behavioral and physiological responses to psychogenic stressors, in part, by influencing activation of the same PVH neurons that are known to maintain body fluid homeostasis. Here, we review past and present research examining interactions between hypothalamic circuits regulating body fluid homeostasis and those mediating behavioral and physiological responses to psychogenic stress.
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Affiliation(s)
- Justin A. Smith
- Laboratory of Dr. Eric Krause, Department of Pharmacodynamics, College of Pharmacy, University of FloridaGainesville, FL, USA
| | - Dipanwita Pati
- Laboratory of Dr. Charles Frazier, Department of Pharmacodynamics, College of Pharmacy, University of FloridaGainesville, FL, USA
| | - Lei Wang
- Laboratory of Dr. Eric Krause, Department of Pharmacodynamics, College of Pharmacy, University of FloridaGainesville, FL, USA
| | - Annette D. de Kloet
- Laboratory of Dr. Colin Sumners, Department of Physiology and Functional Genomics, College of Medicine, University of FloridaGainesville, FL, USA
| | - Charles J. Frazier
- Laboratory of Dr. Charles Frazier, Department of Pharmacodynamics, College of Pharmacy, University of FloridaGainesville, FL, USA
| | - Eric G. Krause
- Laboratory of Dr. Eric Krause, Department of Pharmacodynamics, College of Pharmacy, University of FloridaGainesville, FL, USA
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de Góis Queiroz AI, Medeiros CD, Ribeiro BMM, de Lucena DF, Macêdo DS. Angiotensin receptor blockers for bipolar disorder. Med Hypotheses 2012; 80:259-63. [PMID: 23265360 DOI: 10.1016/j.mehy.2012.11.043] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Revised: 11/22/2012] [Accepted: 11/27/2012] [Indexed: 12/20/2022]
Abstract
Studies have suggested that the brain renin angiotensin system (RAS) regulates cerebral flow, autonomic and hormonal systems, stress, innate immune response and behavior, being implicated in several brain disorders such as major depression, Parkinson's and Alzheimer's disease. The angiotensin II receptor subtype 1 (AT1R) is distributed in brain regions responsible for the control of stress response through peripheral and central sympathetic hyperactivation as well as in the hypothalamic paraventricular region, areas known for the release of several neurotransmitters related to inflammatory response facilitation. This relationship leads to the assumption that AT1R might be the receptor most related to the central deleterious actions of angiotensin II. New evidences from clinical studies have shown a possible role for RAS in the pathogenesis of bipolar disorder (BD), a multifactorial disorder with acknowledged presence of neuronal damage via oxidative stress in brain areas such as hippocampus, prefrontal cortex and striatum. Given the studies highlighting AT1R activation as a central pro-inflammatory pathway and, conversely, the involvement of inflammatory response in the pathogenesis of BD; this paper hypothesizes the use of AT1R antagonists for BD management and prevention of its neuroprogression, due to their anti-inflammatory and neuroprotective effects.
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Affiliation(s)
- Ana Isabelle de Góis Queiroz
- Neuropharmacology Laboratory, Postgraduate Pharmacology Program, Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Ceará, Brazil
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Modification of Normal Activities of Angiotensin II and Angiotensin IV in Rats with Experimental Hypo- and Hyperglycemia. Bull Exp Biol Med 2012; 153:667-70. [DOI: 10.1007/s10517-012-1794-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Visniauskas B, Perry JC, Oliveira V, Dalio FM, Andersen ML, Tufik S, Chagas JR. Cocaine administration increases angiotensin I-converting enzyme (ACE) expression and activity in the rat striatum and frontal cortex. Neurosci Lett 2011; 506:84-8. [PMID: 22056483 DOI: 10.1016/j.neulet.2011.10.054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 09/21/2011] [Accepted: 10/20/2011] [Indexed: 12/22/2022]
Abstract
Some central effects of cocaine administration seem to be related to angiotensin II (Ang II) or its metabolites. Nonetheless, it is still an open question whether or not the levels of angiotensin I-converting enzyme (ACE), the main Ang II generating enzyme, are modified by cocaine administration. To evaluate the effect of acute and subchronic cocaine administration on ACE activity and mRNA expression, male rats were randomly assigned to saline or cocaine group. Acute and subchronic cocaine administration induced a significant increase in ACE activity and mRNA expression in the frontal cortex and striatum but not in the hippocampus. These results suggest that some of the Ang II related effects of cocaine upon the central nervous system can be mediated by changes on the expression and activity of ACE in the striatum and frontal cortex.
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Affiliation(s)
- Bruna Visniauskas
- Departamento de Psicobiologia, Universidade Federal de São Paulo (UNIFESP), Rua Napoleão de Barros, 925, 04024-002, São Paulo, SP, Brazil
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Gard PR, Olivier G, Golding B, Bourner C, Dang T, Haliru H, Higgins E, Kimberley H, Loginova O, Madhavi S, Ryan D. Assessment of biological activity of novel peptide analogues of angiotensin IV. J Pharm Pharmacol 2011; 63:565-71. [DOI: 10.1111/j.2042-7158.2010.01247.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Abstract
Objectives
Angiotensin IV (Ang IV) is a metabolite of angiotensin II which acts on specific AT4 receptors identified as the enzyme insulin regulated aminopeptidase (IRAP). The transduction process of these receptors is unresolved, but Ang IV inhibits the aminopeptidase activity. Ang IV improves cognition in animal models thus there is a desire to develop metabolically stable analogues for further development.
Methods
Peptide analogues of Ang IV were obtained commercially or synthesised. Each peptide was tested in vitro for its ability to inhibit the aminopeptidase activity (IRAP) of mouse brain homogenates and for its effects on isolated rat uterine smooth muscle.
Key findings
[Des-Val1]-Ang IV, acetylated-Ang IV-amide, Ang IV-amide and [des-His4]-Ang IV all inhibited IRAP. [Sar1, Ile8]-Angiotensin II (10 µm) had an effect greater than that of Ang IV or any of the other analogues studied. In isolated uterine smooth muscle, angiotensins II and IV induced contractions, which could be antagonised by an AT1-receptor antagonist. None of the novel peptides induced uterine smooth muscle contractions, but [Sar1, des Arg2-Gly8]-angiotensin II showed significant antagonism of the contractile effects of angiotensin II and carboxyamide-terminated Ang IV-NH2 showed antagonism of Ang IV-induced contractions.
Conclusions
This study provides five novel inhibitors of IRAP worthy of assessment in behavioural models of learning and memory. The analogues are devoid of AT1 receptor agonist properties, and the carboxyamide analogue presents an opportunity to elucidate the mechanism of action of Ang IV as, like Ang IV, it inhibits IRAP, but antagonises the effects of Ang IV on isolated smooth muscle.
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Affiliation(s)
- Paul R Gard
- School of Pharmacy & Biomolecular Sciences, University of Brighton, UK
| | - George Olivier
- School of Pharmacy & Biomolecular Sciences, University of Brighton, UK
| | - Bruno Golding
- School of Pharmacy & Biomolecular Sciences, University of Brighton, UK
| | - Claire Bourner
- Brighton and Sussex Medical School, University of Sussex, Brighton, UK
| | - Tony Dang
- School of Pharmacy & Biomolecular Sciences, University of Brighton, UK
| | - Haliru Haliru
- School of Pharmacy & Biomolecular Sciences, University of Brighton, UK
| | - Eleanor Higgins
- Brighton and Sussex Medical School, University of Sussex, Brighton, UK
| | - Helen Kimberley
- School of Pharmacy & Biomolecular Sciences, University of Brighton, UK
| | - Olga Loginova
- School of Pharmacy & Biomolecular Sciences, University of Brighton, UK
| | - Shahnaz Madhavi
- School of Pharmacy & Biomolecular Sciences, University of Brighton, UK
| | - Denis Ryan
- School of Pharmacy & Biomolecular Sciences, University of Brighton, UK
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Staschewski J, Kulisch C, Albrecht D. Different isoforms of nitric oxide synthase are involved in angiotensin-(1-7)-mediated plasticity changes in the amygdala in a gender-dependent manner. Neuroendocrinology 2011; 94:191-9. [PMID: 21606640 DOI: 10.1159/000328128] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Accepted: 04/02/2011] [Indexed: 11/19/2022]
Abstract
BACKGROUND The amygdala receives afferent sensory input and processes information related to hydromineral balance. Angiotensin acts on and through the amygdala to stimulate thirst and sodium appetite. In addition, different angiotensins seem to play a role in cognition and learning mechanisms by acting on and through the amygdala. Recently, we showed that angiotensin-(1-7) (Ang-(1-7)) enhances the magnitude of long-term potentiation (LTP) in the lateral nucleus of the amygdala (LA) via the Mas receptor. METHODS Extracellular field potentials were measured in the LA. RESULTS LA-LTP induced by stimulation of the external capsule was nitric oxide (NO)-dependent because the NO synthase (NOS) inhibitor L-NAME reduced LA-LTP. The LA-LTP was also reduced in both male and female nNOS and eNOS knockout mice. In male eNOS(-/-) mice, Ang-(1-7) enhanced LA-LTP, whereas the LTP-enhancing effect of Ang-(1-7) was missing in female eNOS(-/-) mice. Therefore, the LTP-enhancing effect of Ang-(1-7) was mediated by eNOS in females. In contrast, Ang-(1-7) strongly enhanced the LTP in nNOS(-/-) females, whereas the effect of Ang-(1-7) was missing in nNOS(-/-) males. Thus, Ang-(1-7) induced an increase in the magnitude of LTP via the involvement of nNOS in males. CONCLUSION Our data support not only the hypothesis that NO contributes to plasticity changes in the lateral amygdala, but also show for the first time a gender-dependent involvement of different isoforms of NOS in the mediation of Ang-(1-7) on LTP in the amygdala.
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Affiliation(s)
- Jörg Staschewski
- Institute of Neurophysiology, Charité-Universitätsmedizin Berlin, Berlin, Germany
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