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Budriesi P, Tintorelli R, Correa J, Villar ME, Marchal P, Giurfa M, Viola H. A behavioral tagging account of kinase contribution to memory formation after spaced aversive training. iScience 2023; 26:107278. [PMID: 37520708 PMCID: PMC10372744 DOI: 10.1016/j.isci.2023.107278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 09/14/2022] [Accepted: 06/30/2023] [Indexed: 08/01/2023] Open
Abstract
Long-term memory (LTM) can be induced by repeated spaced training trials. Using the weak inhibitory avoidance (wIA) task, we showed that one wIA session does not lead to a 24-h LTM, whereas two identical wIA sessions spaced by 15 min to 6 h induce a 24-h LTM. This LTM promotion depends both on hippocampal protein synthesis and the activity of several kinases. In agreement with the behavioral tagging (BT) hypothesis, our results suggest that the two training sessions induce transient learning tags and lead, via a cooperative effect, to the synthesis of plasticity-related proteins (PRPs) that become available and captured by the tag from the second session. Although ERKs1/2 are needed for PRPs synthesis and CaMKs are required for tag setting, PKA participates in both processes. We conclude that the BT mechanism accounts for the molecular constraints underlying the classic effect of spaced learning on LTM formation.
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Affiliation(s)
- Pablo Budriesi
- Instituto de Biología Celular y Neurociencia “Prof. E. De Robertis” (IBCN), Facultad de Medicina, UBA-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Ramiro Tintorelli
- Instituto de Biología Celular y Neurociencia “Prof. E. De Robertis” (IBCN), Facultad de Medicina, UBA-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Julieta Correa
- Instituto de Biología Celular y Neurociencia “Prof. E. De Robertis” (IBCN), Facultad de Medicina, UBA-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Maria Eugenia Villar
- Instituto de Biología Celular y Neurociencia “Prof. E. De Robertis” (IBCN), Facultad de Medicina, UBA-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
- Departamento de Biología y Geología, Física y Química Inorgánica, Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, Madrid, Spain
| | - Paul Marchal
- Instituto de Biología Celular y Neurociencia “Prof. E. De Robertis” (IBCN), Facultad de Medicina, UBA-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
- Poe Lab, Integrative Biology and Physiology department, University of California Los Angeles, Los Angeles, CA, USA
| | - Martin Giurfa
- Centre de Recherches sur la Cognition Animale, Centre de Biologie Intégrative (CBI), University of Toulouse, CNRS, UPS, 31062 Toulouse cedex 9, France
- Institut Universitaire de France (IUF), Paris, France
| | - Haydee Viola
- Instituto de Biología Celular y Neurociencia “Prof. E. De Robertis” (IBCN), Facultad de Medicina, UBA-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
- Departamento de Fisiología, Biología Molecular y Celular “Dr. Héctor Maldonado” (FBMC), Facultad de Ciencias Exactas y Naturales, UBA, Ciudad Autónoma de Buenos Aires, Argentina
- Instituto Tecnológico de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
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2
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Moridi H, Sarihi A, Habibitabar E, Shateri H, Salehi I, Komaki A, Karimi J, Karimi SA. Effects of post-training administration of LY341495, as an mGluR2/3 antagonist on spatial memory deficit in rats fed with high-fat diet. IBRO Rep 2020; 9:241-246. [PMID: 33024878 PMCID: PMC7527618 DOI: 10.1016/j.ibror.2020.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 09/07/2020] [Indexed: 12/12/2022] Open
Abstract
High-fat diets (HFDs) adversely influence glutamate metabolism and neurotransmission. The precise role of the group II metabotropic glutamate receptors (mGluR2/3) antagonist on spatial memory deficit following consumption of HFD has not yet been clarified. Therefore, in this study, we examined the effects of post-training administration of mGluR2/3 antagonism; LY341495 on spatial memory in rats fed with HFD (for 10 weeks) by using Morris Water Maze (MWM) task. The training session for testing memory acquisition in MWM consisted of 4 trials per day for 4 consecutive days. Twenty-four hours after the last training session the spatial probe test (retention) was given. Intraperitoneal injection (i.p) injection of LY341495 was done 30 min before probe test. Our results showed that 10 weeks consumption of HFD had no significant effect on escape latency and swimming distance in memory acquisition. Our finding showed that consumption of a HFD leads to reference memory impairment in the probe test. HFD animals spent less time in the target zone in compare with control animals. Also, LY341495 improved HFD-induced reference memory (retention) impairment. HFD animals treated with LY341495 spent more time in the target zone in compare with HFD animals. Escape latencies to find the visible platform during visual task were same in all experimental groups, indicating no visual impairment in the animals. We propose that a HFD may act through mGluR2/3 within the brain to reduce synaptic plasticity, which impairs memory retrieval, and post-training administration of LY341495 can reduce HFD-induced reference memory impairment.
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Affiliation(s)
- Heresh Moridi
- Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran.,Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Abdolrahman Sarihi
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.,Department of Neuroscience, School of Science and Advanced Technologies in Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Elahe Habibitabar
- Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran.,Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Hossein Shateri
- Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran.,Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Iraj Salehi
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.,Department of Neuroscience, School of Science and Advanced Technologies in Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Alireza Komaki
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.,Department of Neuroscience, School of Science and Advanced Technologies in Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Jamshid Karimi
- Department of Biochemistry, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Seyed Asaad Karimi
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.,Department of Neuroscience, School of Science and Advanced Technologies in Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
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Neale JH, Olszewski R. A role for N-acetylaspartylglutamate (NAAG) and mGluR3 in cognition. Neurobiol Learn Mem 2019; 158:9-13. [PMID: 30630041 DOI: 10.1016/j.nlm.2019.01.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/03/2018] [Accepted: 01/05/2019] [Indexed: 12/18/2022]
Abstract
The peptide transmitter N-acetylaspartylglutamate (NAAG) and its receptor, the type 3 metabotropic glutamate receptor (mGluR3, GRM3), are prevalent and widely distributed in the mammalian nervous system. Drugs that inhibit the inactivation of synaptically released NAAG have procognitive activity in object recognition and other behavioral models. These inhibitors also reverse cognitive deficits in animal models of clinical disorders. Antagonists of mGluR3 block these actions and mice that are null mutant for this receptor are insensitive to the actions of these procognitive drugs. A positive allosteric modulator of this receptor also has procognitive activity. While some data suggest that drugs acting on mGluR3 achieve their procognitive action by increasing arousal during acquisition training, exploration of the procognitive efficacy of NAAG is in its early stages and thus substantial opportunities exist to define the breadth and nature of this activity.
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Affiliation(s)
- Joseph H Neale
- Department of Biology, Georgetown University, Washington, DC, USA.
| | - Rafal Olszewski
- Department of Biology, Georgetown University, Washington, DC, USA.
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4
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Hyperlipidemia-induced cholesterol crystal production by endothelial cells promotes atherogenesis. Nat Commun 2017; 8:1129. [PMID: 29066718 PMCID: PMC5654750 DOI: 10.1038/s41467-017-01186-z] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 08/24/2017] [Indexed: 12/27/2022] Open
Abstract
Endothelial cells (EC) play a key role in atherosclerosis. Although EC are in constant contact with low density lipoproteins (LDL), how EC process LDL and whether this influences atherogenesis, is unclear. Here we show that EC take up and metabolize LDL, and when overburdened with intracellular cholesterol, generate cholesterol crystals (CC). The CC are deposited on the basolateral side, and compromise endothelial function. When hyperlipidemic mice are given a high fat diet, CC appear in aortic sinus within 1 week. Treatment with cAMP-enhancing agents, forskolin/rolipram (F/R), mitigates effects of CC on endothelial function by not only improving barrier function, but also inhibiting CC formation both in vitro and in vivo. A proof of principle study using F/R incorporated into liposomes, designed to target inflamed endothelium, shows reduced atherosclerosis and CC formation in ApoE−/− mice. Our findings highlight an important mechanism by which EC contribute to atherogenesis under hyperlipidemic conditions. Atherosclerosis is characterized by subendothelial lipid retention believed to be the result of endothelial trancytosis. Here, the authors show that endothelium can take up and process LDL, generating cholesterol crystals that are deposited on the basolateral side of the cells, causing their dysfunction that can be prevented by forskolin/rolipram treatment.
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5
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Pinto Brod LM, Fronza MG, Vargas JP, Lüdtke DS, Brüning CA, Savegnago L. Modulation of PKA, PKC, CAMKII, ERK 1/2 pathways is involved in the acute antidepressant-like effect of (octylseleno)-xylofuranoside (OSX) in mice. Psychopharmacology (Berl) 2017; 234:717-725. [PMID: 27995278 DOI: 10.1007/s00213-016-4505-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 12/09/2016] [Indexed: 12/13/2022]
Abstract
RATIONALE (Octylseleno)-xylofuranoside (OSX) is an organoselenium compound from the class of alkylseleno carbohydrates possessing a C8 alkyl chain. Members of this class of organoselenium compounds have promising pharmacological activities, among them are antioxidant and acute antidepressant-like activities with the involvement of monoaminergic system, as previously presented by our research group. OBJECTIVE The objective of the study was to investigate the possible involvement of cellular signalling pathways in the antidepressant-like effect caused by OSX (0.01 mg/kg, oral route (p.o.) by gavage) in the tail suspension test (TST) in mice. METHODS Mice were treated by intracerebroventricular (i.c.v.) injection either with vehicle or with H-89 (1 μg/site i.c.v., an inhibitor of protein kinase A-PKA), KN-62 (1 μg/site i.c.v., an inhibitor of Ca2+/calmodulin-dependent protein kinase II-CAMKII), chelerythrine (1 μg/site i.c.v., an inhibitor of protein kinase C-PKC) or PD098059 (5 μg/site i.c.v., an inhibitor of extracellular-regulated protein kinase 1/2-ERK1/2). Fifteen minutes after, vehicle or OSX was injected, and 30 min later, the TST and open field tests (OFT) were carried out. RESULTS The antidepressant-like effect of orally administered OSX was blocked by treatment of the mice with H-89, KN-62, chelerythrine and PD098059; all inhibitors of signalling proteins involved with neurotrophic signalling pathways. The number of crossings in the OFT was not altered by treatment with OSX and/or signalling antagonists. CONCLUSIONS The results demonstrated that OSX showed an antidepressant-like effect in the TST in mice through the activation of protein kinases PKA, PKC, CAMKII and ERK1/2 that are involved in intracellular signalling pathways.
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Affiliation(s)
- Lucimar M Pinto Brod
- Programa de Pós Graduação em Biotecnologia, PPGBiotec, Grupo de Pesquisa em Neurobiotecnologia - GPN, CDTec, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brazil
| | - Mariana G Fronza
- Programa de Pós Graduação em Biotecnologia, PPGBiotec, Grupo de Pesquisa em Neurobiotecnologia - GPN, CDTec, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brazil
| | - Jaqueline Pinto Vargas
- Instituto de Química, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, Porto Alegre, RS, 91501-970, Brazil
| | - Diogo S Lüdtke
- Instituto de Química, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, Porto Alegre, RS, 91501-970, Brazil
| | - César Augusto Brüning
- Núcleo de Síntese, Aplicação e Análise de Compostos Orgânicos e Inorgânicos, Universidade Federal da Fronteira Sul, Cerro Largo, RS, Brazil
| | - Lucielli Savegnago
- Programa de Pós Graduação em Biotecnologia, PPGBiotec, Grupo de Pesquisa em Neurobiotecnologia - GPN, CDTec, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brazil. .,Programa de Pós Graduação em Bioquímica e Bioprospecção, PPGBBio, Grupo de Pesquisa em Neurobiotecnologia - GPN, CCQFA, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brazil.
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6
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Phosphodiesterase-4B as a Therapeutic Target for Cognitive Impairment and Obesity-Related Metabolic Diseases. ADVANCES IN NEUROBIOLOGY 2017; 17:103-131. [DOI: 10.1007/978-3-319-58811-7_5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Aldrich A, Bosch ME, Fallet R, Odvody J, Burkovetskaya M, Rama Rao KV, Cooper JD, Drack AV, Kielian T. Efficacy of phosphodiesterase-4 inhibitors in juvenile Batten disease (CLN3). Ann Neurol 2016; 80:909-923. [PMID: 27804148 PMCID: PMC5215570 DOI: 10.1002/ana.24815] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 09/19/2016] [Accepted: 10/23/2016] [Indexed: 12/28/2022]
Abstract
OBJECTIVE Juvenile neuronal ceroid lipofuscinosis (JNCL), or juvenile Batten disease, is a pediatric lysosomal storage disease caused by autosomal recessive mutations in CLN3, typified by blindness, seizures, progressive cognitive and motor decline, and premature death. Currently, there is no treatment for JNCL that slows disease progression, which highlights the need to explore novel strategies to extend the survival and quality of life of afflicted children. Cyclic adenosine monophosphate (cAMP) is a second messenger with pleiotropic effects, including regulating neuroinflammation and neuronal survival. Here we investigated whether 3 phosphodiesterase-4 (PDE4) inhibitors (rolipram, roflumilast, and PF-06266047) could mitigate behavioral deficits and cell-specific pathology in the Cln3Δex7/8 mouse model of JNCL. METHODS In a randomized, blinded study, wild-type (WT) and Cln3Δex7/8 mice received PDE4 inhibitors daily beginning at 1 or 3 months of age and continuing for 6 to 9 months, with motor deficits assessed by accelerating rotarod testing. The effect of PDE4 inhibitors on cAMP levels, astrocyte and microglial activation (glial fibrillary acidic protein and CD68, respectively), lysosomal pathology (lysosomal-associated membrane protein 1), and astrocyte glutamate transporter expression (glutamate/aspartate transporter) were also examined in WT and Cln3Δex7/8 animals. RESULTS cAMP levels were significantly reduced in the Cln3Δex7/8 brain, and were restored by PF-06266047. PDE4 inhibitors significantly improved motor function in Cln3Δex7/8 mice, attenuated glial activation and lysosomal pathology, and restored glutamate transporter expression to levels observed in WT animals, with no evidence of toxicity as revealed by blood chemistry analysis. INTERPRETATION These studies reveal neuroprotective effects for PDE4 inhibitors in Cln3Δex7/8 mice and support their therapeutic potential in JNCL patients. Ann Neurol 2016;80:909-923.
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Affiliation(s)
- Amy Aldrich
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE
| | - Megan E Bosch
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE
| | - Rachel Fallet
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE
| | - Jessica Odvody
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE
| | - Maria Burkovetskaya
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE
| | | | - Jonathan D Cooper
- Department of Basic & Clinical Neuroscience, King's College, London, United Kingdom.,Los Angeles Biomedical Research Institute and David Geffen School of Medicine at UCLA, Harbor UCLA Medical Center, Torrance, CA
| | - Arlene V Drack
- Department of Ophthalmology and Visual Sciences, University of Iowa Carver College of Medicine, Iowa City, IA
| | - Tammy Kielian
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE
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8
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Choi CH, Schoenfeld BP, Bell AJ, Hinchey J, Rosenfelt C, Gertner MJ, Campbell SR, Emerson D, Hinchey P, Kollaros M, Ferrick NJ, Chambers DB, Langer S, Sust S, Malik A, Terlizzi AM, Liebelt DA, Ferreiro D, Sharma A, Koenigsberg E, Choi RJ, Louneva N, Arnold SE, Featherstone RE, Siegel SJ, Zukin RS, McDonald TV, Bolduc FV, Jongens TA, McBride SMJ. Multiple Drug Treatments That Increase cAMP Signaling Restore Long-Term Memory and Aberrant Signaling in Fragile X Syndrome Models. Front Behav Neurosci 2016; 10:136. [PMID: 27445731 PMCID: PMC4928101 DOI: 10.3389/fnbeh.2016.00136] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 06/15/2016] [Indexed: 01/01/2023] Open
Abstract
Fragile X is the most common monogenic disorder associated with intellectual disability (ID) and autism spectrum disorders (ASD). Additionally, many patients are afflicted with executive dysfunction, ADHD, seizure disorder and sleep disturbances. Fragile X is caused by loss of FMRP expression, which is encoded by the FMR1 gene. Both the fly and mouse models of fragile X are also based on having no functional protein expression of their respective FMR1 homologs. The fly model displays well defined cognitive impairments and structural brain defects and the mouse model, although having subtle behavioral defects, has robust electrophysiological phenotypes and provides a tool to do extensive biochemical analysis of select brain regions. Decreased cAMP signaling has been observed in samples from the fly and mouse models of fragile X as well as in samples derived from human patients. Indeed, we have previously demonstrated that strategies that increase cAMP signaling can rescue short term memory in the fly model and restore DHPG induced mGluR mediated long term depression (LTD) in the hippocampus to proper levels in the mouse model (McBride et al., 2005; Choi et al., 2011, 2015). Here, we demonstrate that the same three strategies used previously with the potential to be used clinically, lithium treatment, PDE-4 inhibitor treatment or mGluR antagonist treatment can rescue long term memory in the fly model and alter the cAMP signaling pathway in the hippocampus of the mouse model.
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Affiliation(s)
- Catherine H Choi
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva UniversityBronx, NY, USA; Department of Dermatology, Dermatology Clinic, Drexel University College of MedicinePhiladelphia, PA, USA; Jongens Laboratory, Department of Genetics, University of Pennsylvania School of MedicinePhiladelphia, PA, USA
| | - Brian P Schoenfeld
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva UniversityBronx, NY, USA; Jongens Laboratory, Department of Genetics, University of Pennsylvania School of MedicinePhiladelphia, PA, USA
| | - Aaron J Bell
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva UniversityBronx, NY, USA; Jongens Laboratory, Department of Genetics, University of Pennsylvania School of MedicinePhiladelphia, PA, USA
| | - Joseph Hinchey
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - Cory Rosenfelt
- Bolduc Laboratory, Department of Pediatrics, Center for Neuroscience, University of Alberta Edmonton, AB, Canada
| | - Michael J Gertner
- Zukin Laboratory, Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - Sean R Campbell
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - Danielle Emerson
- Jongens Laboratory, Department of Genetics, University of Pennsylvania School of Medicine Philadelphia, PA, USA
| | - Paul Hinchey
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - Maria Kollaros
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - Neal J Ferrick
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva UniversityBronx, NY, USA; Jongens Laboratory, Department of Genetics, University of Pennsylvania School of MedicinePhiladelphia, PA, USA
| | - Daniel B Chambers
- Bolduc Laboratory, Department of Pediatrics, Center for Neuroscience, University of Alberta Edmonton, AB, Canada
| | - Steven Langer
- Bolduc Laboratory, Department of Pediatrics, Center for Neuroscience, University of Alberta Edmonton, AB, Canada
| | - Steven Sust
- Siegel Laboratory, Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania School of Medicine Philadelphia, PA, USA
| | - Aatika Malik
- Jongens Laboratory, Department of Genetics, University of Pennsylvania School of Medicine Philadelphia, PA, USA
| | - Allison M Terlizzi
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - David A Liebelt
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - David Ferreiro
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - Ali Sharma
- Zukin Laboratory, Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - Eric Koenigsberg
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - Richard J Choi
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - Natalia Louneva
- Arnold Laboratory, Department of Psychiatry, University of Pennsylvania School of Medicine Philadelphia, PA, USA
| | - Steven E Arnold
- Arnold Laboratory, Department of Psychiatry, University of Pennsylvania School of Medicine Philadelphia, PA, USA
| | - Robert E Featherstone
- Siegel Laboratory, Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania School of Medicine Philadelphia, PA, USA
| | - Steven J Siegel
- Siegel Laboratory, Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania School of Medicine Philadelphia, PA, USA
| | - R Suzanne Zukin
- Zukin Laboratory, Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - Thomas V McDonald
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva University Bronx, NY, USA
| | - Francois V Bolduc
- Bolduc Laboratory, Department of Pediatrics, Center for Neuroscience, University of Alberta Edmonton, AB, Canada
| | - Thomas A Jongens
- Jongens Laboratory, Department of Genetics, University of Pennsylvania School of Medicine Philadelphia, PA, USA
| | - Sean M J McBride
- McDonald Laboratory, Section of Molecular Cardiology, Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, Yeshiva UniversityBronx, NY, USA; Jongens Laboratory, Department of Genetics, University of Pennsylvania School of MedicinePhiladelphia, PA, USA; Siegel Laboratory, Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania School of MedicinePhiladelphia, PA, USA
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PDE-4 inhibition rescues aberrant synaptic plasticity in Drosophila and mouse models of fragile X syndrome. J Neurosci 2015; 35:396-408. [PMID: 25568131 DOI: 10.1523/jneurosci.1356-12.2015] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Fragile X syndrome (FXS) is the leading cause of both intellectual disability and autism resulting from a single gene mutation. Previously, we characterized cognitive impairments and brain structural defects in a Drosophila model of FXS and demonstrated that these impairments were rescued by treatment with metabotropic glutamate receptor (mGluR) antagonists or lithium. A well-documented biochemical defect observed in fly and mouse FXS models and FXS patients is low cAMP levels. cAMP levels can be regulated by mGluR signaling. Herein, we demonstrate PDE-4 inhibition as a therapeutic strategy to ameliorate memory impairments and brain structural defects in the Drosophila model of fragile X. Furthermore, we examine the effects of PDE-4 inhibition by pharmacologic treatment in the fragile X mouse model. We demonstrate that acute inhibition of PDE-4 by pharmacologic treatment in hippocampal slices rescues the enhanced mGluR-dependent LTD phenotype observed in FXS mice. Additionally, we find that chronic treatment of FXS model mice, in adulthood, also restores the level of mGluR-dependent LTD to that observed in wild-type animals. Translating the findings of successful pharmacologic intervention from the Drosophila model into the mouse model of FXS is an important advance, in that this identifies and validates PDE-4 inhibition as potential therapeutic intervention for the treatment of individuals afflicted with FXS.
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Mukherjee S, Manahan-Vaughan D. Role of metabotropic glutamate receptors in persistent forms of hippocampal plasticity and learning. Neuropharmacology 2013; 66:65-81. [DOI: 10.1016/j.neuropharm.2012.06.005] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 05/31/2012] [Accepted: 06/01/2012] [Indexed: 12/27/2022]
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11
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Zeni ALB, Zomkowski ADE, Maraschin M, Rodrigues ALS, Tasca CI. Involvement of PKA, CaMKII, PKC, MAPK/ERK and PI3K in the acute antidepressant-like effect of ferulic acid in the tail suspension test. Pharmacol Biochem Behav 2012; 103:181-6. [DOI: 10.1016/j.pbb.2012.08.020] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 08/21/2012] [Accepted: 08/26/2012] [Indexed: 01/17/2023]
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12
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Janczura KJ, Olszewski RT, Bzdega T, Bacich DJ, Heston WD, Neale JH. NAAG peptidase inhibitors and deletion of NAAG peptidase gene enhance memory in novel object recognition test. Eur J Pharmacol 2012. [PMID: 23200894 DOI: 10.1016/j.ejphar.2012.11.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The peptide neurotransmitter N-acetylaspartylglutamate (NAAG) is inactivated by the extracellular enzyme glutamate carboxypeptidase II. Inhibitors of this enzyme reverse dizocilpine (MK-801)-induced impairment of short-term memory in the novel object recognition test. The objective of this study was to test the hypothesis that NAAG peptidase inhibition enhances long-term (24h delay) memory of C57BL mice. These mice and mice in which glutamate carboxypeptidase II had been knocked out were presented with two identical objects to explore for 10min on day 1 and tested with one of these familiar objects and one novel object on day 2. Memory was assessed as the degree to which the mice recalled the familiar object and explored the novel object to a greater extent on day 2. Uninjected mice or mice injected with saline prior to the acquisition session on day 1 demonstrated a lack of memory of the acquisition experience by exploring the familiar and novel objects to the same extent on day 2. Mice treated with glutamate carboxypeptidase II inhibitors ZJ43 or 2-PMPA prior to the acquisition trial explored the novel object significantly more time than the familiar object on day 2. Consistent with these results, mice in which glutamate carboxypeptidase II had been knocked out distinguished the novel from the familiar object on day 2 while their heterozygous colony mates did not. Inhibition of glutamate carboxypeptidase II enhances recognition memory, a therapeutic action that might be useful in treatment of memory deficits related to age and neurological disorders.
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Pitsikas N, Kaffe E, Markou A. The metabotropic glutamate 2/3 receptor antagonist LY341495 differentially affects recognition memory in rats. Behav Brain Res 2012; 230:374-9. [DOI: 10.1016/j.bbr.2012.02.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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14
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Herman EJ, Bubser M, Conn PJ, Jones CK. Metabotropic glutamate receptors for new treatments in schizophrenia. Handb Exp Pharmacol 2012:297-365. [PMID: 23027420 DOI: 10.1007/978-3-642-25758-2_11] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Metabotropic glutamate receptors (mGluRs) represent exciting targets for the development of novel therapeutic agents for schizophrenia. Recent studies indicate that selective activation of specific mGluR subtypes may provide potential benefits for not only the positive symptoms, but also the negative symptoms and cognitive impairments observed in individuals with schizophrenia. Although optimization of traditional orthosteric agonists may still offer a feasible approach for the activation of mGluRs, important progress has been made in the discovery of novel subtype-selective allosteric ligands, including positive allosteric modulators (PAMs) of mGluR2 and mGluR5. These allosteric mGluR ligands have improved properties for clinical development and have served as key preclinical tools for a more in-depth understanding of the potential roles of these different mGluR subtypes for the treatment of schizophrenia.
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Affiliation(s)
- E J Herman
- Vanderbilt Center for Neuroscience Drug Discovery, Vanderbilt University Medical Center, Nashville, TN 37232, USA
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15
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Fractionation of spatial memory in GRM2/3 (mGlu2/mGlu3) double knockout mice reveals a role for group II metabotropic glutamate receptors at the interface between arousal and cognition. Neuropsychopharmacology 2011; 36:2616-28. [PMID: 21832989 PMCID: PMC3230485 DOI: 10.1038/npp.2011.145] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Group II metabotropic glutamate receptors (mGluR2 and mGluR3, encoded by GRM2 and GRM3) are implicated in hippocampal function and cognition, and in the pathophysiology and treatment of schizophrenia and other psychiatric disorders. However, pharmacological and behavioral studies with group II mGluR agonists and antagonists have produced complex results. Here, we studied hippocampus-dependent memory in GRM2/3 double knockout (GRM2/3(-/-)) mice in an iterative sequence of experiments. We found that they were impaired on appetitively motivated spatial reference and working memory tasks, and on a spatial novelty preference task that relies on animals' exploratory drive, but were unimpaired on aversively motivated spatial memory paradigms. GRM2/3(-/-) mice also performed normally on an appetitively motivated, non-spatial, visual discrimination task. These results likely reflect an interaction between GRM2/3 genotype and the arousal-inducing properties of the experimental paradigm. The deficit seen on appetitive and exploratory spatial memory tasks may be absent in aversive tasks because the latter induce higher levels of arousal, which rescue spatial learning. Consistent with an altered arousal-cognition relationship in GRM2/3(-/-) mice, injection stress worsened appetitively motivated, spatial working memory in wild-types, but enhanced performance in GRM2/3(-/-) mice. GRM2/3(-/-) mice were also hypoactive in response to amphetamine. This fractionation of hippocampus-dependent memory depending on the appetitive-aversive context is to our knowledge unique, and suggests a role for group II mGluRs at the interface of arousal and cognition. These arousal-dependent effects may explain apparently conflicting data from previous studies, and have translational relevance for the involvement of these receptors in schizophrenia and other disorders.
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Drago A, Crisafulli C, Sidoti A, Serretti A. The molecular interaction between the glutamatergic, noradrenergic, dopaminergic and serotoninergic systems informs a detailed genetic perspective on depressive phenotypes. Prog Neurobiol 2011; 94:418-60. [DOI: 10.1016/j.pneurobio.2011.05.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 05/28/2011] [Accepted: 05/31/2011] [Indexed: 12/12/2022]
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17
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Choi CH, Schoenfeld BP, Bell AJ, Hinchey P, Kollaros M, Gertner MJ, Woo NH, Tranfaglia MR, Bear MF, Zukin RS, McDonald TV, Jongens TA, McBride SMJ. Pharmacological reversal of synaptic plasticity deficits in the mouse model of fragile X syndrome by group II mGluR antagonist or lithium treatment. Brain Res 2010; 1380:106-19. [PMID: 21078304 DOI: 10.1016/j.brainres.2010.11.032] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2010] [Revised: 11/01/2010] [Accepted: 11/07/2010] [Indexed: 11/27/2022]
Abstract
Fragile X syndrome is the leading single gene cause of intellectual disabilities. Treatment of a Drosophila model of Fragile X syndrome with metabotropic glutamate receptor (mGluR) antagonists or lithium rescues social and cognitive impairments. A hallmark feature of the Fragile X mouse model is enhanced mGluR-dependent long-term depression (LTD) at Schaffer collateral to CA1 pyramidal synapses of the hippocampus. Here we examine the effects of chronic treatment of Fragile X mice in vivo with lithium or a group II mGluR antagonist on mGluR-LTD at CA1 synapses. We find that long-term lithium treatment initiated during development (5-6 weeks of age) and continued throughout the lifetime of the Fragile X mice until 9-11 months of age restores normal mGluR-LTD. Additionally, chronic short-term treatment beginning in adult Fragile X mice (8 weeks of age) with either lithium or an mGluR antagonist is also able to restore normal mGluR-LTD. Translating the findings of successful pharmacologic intervention from the Drosophila model into the mouse model of Fragile X syndrome is an important advance, in that this identifies and validates these targets as potential therapeutic interventions for the treatment of individuals afflicted with Fragile X syndrome.
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Affiliation(s)
- Catherine H Choi
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
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Xu J, Yan HC, Yang B, Tong LS, Zou YX, Tian Y. Effects of lead exposure on hippocampal metabotropic glutamate receptor subtype 3 and 7 in developmental rats. J Negat Results Biomed 2009; 8:5. [PMID: 19374778 PMCID: PMC2674876 DOI: 10.1186/1477-5751-8-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2008] [Accepted: 04/20/2009] [Indexed: 11/15/2022] Open
Abstract
Background A complete explanation of the mechanisms by which Pb2+ exerts toxic effects on developmental central nervous system remains unknown. Glutamate is critical to the developing brain through various subtypes of ionotropic or metabotropic glutamate receptors (mGluRs). Ionotropic N-methyl-D-aspartate receptors have been considered as a principal target in lead-induced neurotoxicity. The relationship between mGluR3/mGluR7 and synaptic plasticity had been verified by many recent studies. The present study aimed to examine the role of mGluR3/mGluR7 in lead-induced neurotoxicity. Methods Twenty-four adult and female rats were randomly selected and placed on control or 0.2% lead acetate during gestation and lactation. Blood lead and hippocampal lead levels of pups were analyzed at weaning to evaluate the actual lead content at the end of the exposure. Impairments of short -term memory and long-term memory of pups were assessed by tests using Morris water maze and by detection of hippocampal ultrastructural alterations on electron microscopy. The impact of lead exposure on mGluR3 and mGluR7 mRNA expression in hippocampal tissue of pups were investigated by quantitative real-time polymerase chain reaction and its potential role in lead neurotoxicity were discussed. Results Lead levels of blood and hippocampi in the lead-exposed rats were significantly higher than those in the controls (P < 0.001). In tests using Morris Water Maze, the overall decrease in goal latency and swimming distance was taken to indicate that controls had shorter latencies and distance than lead-exposed rats (P = 0.001 and P < 0.001 by repeated-measures analysis of variance). On transmission electron microscopy neuronal ultrastructural alterations were observed and the results of real-time polymerase chain reaction showed that exposure to 0.2% lead acetate did not substantially change gene expression of mGluR3 and mGluR7 mRNA compared with controls. Conclusion Exposure to lead before and after birth can damage short-term and long-term memory ability of young rats and hippocampal ultrastructure. However, the current study does not provide evidence that the expression of rat hippocampal mGluR3 and mGluR7 can be altered by systemic administration of lead during gestation and lactation, which are informative for the field of lead-induced developmental neurotoxicity noting that it seems not to be worthwhile to include mGluR3 and mGluR7 in future studies.
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Affiliation(s)
- Jian Xu
- Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute for Pediatric Research, Shanghai Key Laboratory of Children's Environmental Health, Shanghai, PR China.
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Palucha A, Pilc A. Metabotropic glutamate receptor ligands as possible anxiolytic and antidepressant drugs. Pharmacol Ther 2007; 115:116-47. [PMID: 17582504 DOI: 10.1016/j.pharmthera.2007.04.007] [Citation(s) in RCA: 175] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2007] [Accepted: 04/25/2007] [Indexed: 11/18/2022]
Abstract
Depression and anxiety represent a major problem. However, the current treatment of both groups of diseases is not satisfactory. As the glutamatergic system may play an important role in pathophysiology of both depression and anxiety, we decided to discuss the recent data on possible anxiolytic and/or antidepressant effects of metabotropic glutamate (mGlu) receptor ligands. Preclinical data indicated that antagonists of group I mGlu receptors, particularly antagonists of mGlu5 receptors, produced both anxiolytic-like and antidepressant-like effects. Clinical data also demonstrated that mGlu5 receptor antagonist, fenobam, was an active anxiolytic drug. The anxiolytic effects exerted by mGlu5 receptor antagonists are profound, comparable with or stronger than those of benzodiazepines. However, the problem with the psychotomimetic activity of mGlu5 receptor antagonists and their possible influence on memory has to be further investigated. Among all mGlu receptor ligands, group II mGlu receptor agonists seem to be the drugs with the most promising therapeutic potential and a good safety profile. Animal studies showed anxiolytic-like effects of group II mGlu receptor agonists. Currently, group II mGlu receptor agonists are in phase III clinical trials for potential treatment of anxiety disorders. On the other hand, data has been accumulated, indicating that antagonists of group II mGlu receptors have an antidepressant potential. Group III mGlu receptor ligands represent the least investigated group of mGlu receptors. However, preclinical data also indicates that ligands of these receptors, both agonists and antagonists, may have an anxiolytic-like and antidepressant-like potential.
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Affiliation(s)
- Agnieszka Palucha
- Institute of Pharmacology, Polish Academy of Sciences, Smetna 12, 31-343 Kraków, Poland
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20
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Xu J, Yan CH, Wu SH, Yu XD, Yu XG, Shen XM. Developmental lead exposure alters gene expression of metabotropic glutamate receptors in rat hippocampal neurons. Neurosci Lett 2007; 413:222-6. [PMID: 17267122 DOI: 10.1016/j.neulet.2006.10.070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2006] [Revised: 10/24/2006] [Accepted: 10/31/2006] [Indexed: 11/29/2022]
Abstract
Exposure to lead in utero and in infancy is associated with a risk of impaired cognitive development. Increasing evidence suggests that the family of metabotropic glutamate receptors (mGluRs) plays an important role in synaptic plasticity and memory formation. We determined whether mGluRs subtypes 1, 3, and 7 (mGluR1, mGluR3, and mGluR7) were involved in developmental neurotoxicity due to lead. Embryonic rat hippocampal neurons were cultured for 21 days and exposed to lead chloride beginning on the fourth day of incubation. We investigated levels of mGluR1, mGluR3, and mGluR7 mRNA expression by using quantitative real-time reverse-transcription polymerase chain reaction (RT-PCR) with lead exposure at 10 nM, 1 microM, and 100 microM. Lead exposure in vitro downregulated the expression of mGluR1 mRNA and upregulated the expression of mGluR3 and mGluR7 mRNA in a dose-dependent manner. We speculate that mGluRs may be involved in lead neurotoxicity. Pathways that likely contribute to lead neurotoxicity by means of mGluRs are impairment of long-term potentiation, effects on N-methyl-D-aspartate (NMDA) receptor functions, and depotentiation.
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Affiliation(s)
- Jian Xu
- Shanghai XinHua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai Institute for Pediatric Research, Shanghai Key Laboratory of Children's Environmental Health, Shanghai 200092, China
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21
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Barker GRI, Bashir ZI, Brown MW, Warburton EC. A temporally distinct role for group I and group II metabotropic glutamate receptors in object recognition memory. Learn Mem 2006; 13:178-86. [PMID: 16585793 PMCID: PMC1409835 DOI: 10.1101/lm.77806] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Recognition memory, involving the ability to discriminate between a novel and familiar object, depends on the integrity of the perirhinal cortex (PRH). Glutamate, the main excitatory neurotransmitter in the cortex, is essential for many types of memory processes. Of the subtypes of glutamate receptor, metabotropic receptors (mGluRs) have received less study than NMDA receptors; thus, the reported experiments examined the role of mGluRs in familiarity discrimination in the rat PRH. Experiments 1 and 2 assessed the effects of systemic administration of MPEP, a group I mGluR (specifically mGluR5) antagonist, and/or LY341495, a group II mGluR antagonist, on a spontaneous object novelty preference task. Simultaneous antagonism of both group I and II mGluRs impaired familiarity discrimination following a 24-h but not a 15-min delay, while antagonism of either mGluR subtype alone had no effect at either delay. The impairment was in acquisition, as in Experiment 3 coadministration of MPEP and LY341495 did not affect recognition memory performance when administered either after the sample phase or prior to test. The impairment in long-term recognition memory was mediated by mGluRs in the PRH, as localized intracortical antagonism of group I and II mGluRs also produced a deficit (Experiment 4). No evidence was found for an involvement of group III mGluRs in the acquisition of long-term familiarity discrimination (Experiment 5). These findings establish that glutamatergic neurotransmission in the PRH via group I and II mGluRs is crucial for the acquisition, but not for the consolidation or retrieval of long-term object recognition memory.
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Affiliation(s)
- Gareth Robert Isaac Barker
- MRC Centre for Synaptic Plasticity, Department of Anatomy, University of Bristol, Bristol BS8 1 TD, United Kingdom
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Gerdjikov TV, Beninger RJ. Place preference induced by nucleus accumbens amphetamine is impaired by local blockade of Group II metabotropic glutamate receptors in rats. BMC Neurosci 2006; 7:43. [PMID: 16734896 PMCID: PMC1501036 DOI: 10.1186/1471-2202-7-43] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2006] [Accepted: 05/30/2006] [Indexed: 11/10/2022] Open
Abstract
Background The nucleus accumbens (NAc) plays a critical role in amphetamine-produced conditioned place preference (CPP). In previous studies, NAc basal and amphetamine-produced DA transmission was altered by Group II mGluR agents. We tested whether NAc amphetamine CPP depends on Group II mGluR transmission. Results NAc injections (0.5 μl/side) of the Group II mGluR antagonist (2 S)- a-ethylglutamic acid (EGLU: 0.01–0.8 μg but not 0.001 μg) impaired CPP. The drug did not block the acute locomotor effect of amphetamine. Conclusion Results suggest that Group II mGluRs may be necessary for the establishment of NAc amphetamine-produced CPP. These receptors may also mediate other forms of reward-related learning dependent on this structure.
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Affiliation(s)
- Todor V Gerdjikov
- Department of Psychology, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Richard J Beninger
- Department of Psychology, Queen's University, Kingston, ON K7L 3N6, Canada
- Department of Psychiatry, Queen's University, Kingston, ON K7L 3N6, Canada
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Monti B, Berteotti C, Contestabile A. Subchronic rolipram delivery activates hippocampal CREB and arc, enhances retention and slows down extinction of conditioned fear. Neuropsychopharmacology 2006; 31:278-86. [PMID: 15988467 DOI: 10.1038/sj.npp.1300813] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Rolipram, a type IV-specific phosphodiesterase inhibitor, is known to improve memory under various learning tasks. Moreover, Rolipram treatments have been shown to increase expression and phosphorylation of a key factor for hippocampal memory consolidation, the cAMP-dependent response element-binding protein, CREB. However, the exact correlation between hippocampal CREB phosphorylation and memory improvement induced by Rolipram has not yet been determined in a CREB-dependent type of hippocampal-related learning in normogenic, intact rodents. Here, we report that subchronic Rolipram delivery by using osmotic minipumps increased the basal rat hippocampal expression and phosphorylation of CREB, as well as the expression of the cAMP-dependent, memory-related protein, Arc. In parallel, the same treatment improved memory consolidation of conditioned fear. Furthermore, the increase of CREB phosphorylation and Arc expression consequent to the learning experience was enhanced in Rolipram-treated rats, compared to controls. By evaluating the time course of memory extinction over 10 days after the initial learning test, we also observed significant slowing down of the memory extinction rate in Rolipram-treated rats. This effect could be attributed to CREB phosphorylation and memory having been initially higher, as osmotic minipumps stopped to release Rolipram the first day after the initial learning test. Our data define the conditions through which the pharmacological manipulation of hippocampal CREB expression and activation result in memory amelioration in normogenic, intact animals. These results are relevant for the study of molecular correlates of memory, and may also be important in view of the efforts to design new pharmacological treatments, targeting the CREB pathway and leading to enhancement of learning and memory, even in the absence of patent neuropathology.
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Almeida RC, Souza DG, Soletti RC, López MG, Rodrigues ALS, Gabilan NH. Involvement of PKA, MAPK/ERK and CaMKII, but not PKC in the acute antidepressant-like effect of memantine in mice. Neurosci Lett 2005; 395:93-7. [PMID: 16289784 DOI: 10.1016/j.neulet.2005.10.057] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2005] [Revised: 10/14/2005] [Accepted: 10/25/2005] [Indexed: 11/26/2022]
Abstract
This study investigated the cellular signaling pathways involved in the acute antidepressant-like action of memantine in the forced swimming test (FST) in mice. The immobility time in the FST was reduced by memantine (3-10 mg/kg, i.p.). The anti-immobility effect of memantine (3 mg/kg, i.p.) was prevented by pretreatment with H-89 (1 microg/site, i.c.v., an inhibitor of PKA), PD098059 (5 microg/site, i.c.v., an inhibitor of MAPK/ERK), KN-62 (1 microg/site, i.c.v., an inhibitor of CaMKII), but not with chelerythrine (1 microg/site, i.c.v., an inhibitor of PKC). Taken together, these results firstly demonstrate that the acute antidepressant-like effect of memantine seems to be dependent on the cellular signaling modulated by PKA, CaMKII and MAPK/ERK, but not by PKC.
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Affiliation(s)
- Rúbia C Almeida
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Trindade, Florianópolis 88040-900, SC, Brazil
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Sato T, Ishida T, Tanaka KI, Ohnishi Y, Irifune M, Mimura T, Nishikawa T. Ameliorative and Exacerbating Effects of [pGlu4,Cyt6]AVP(4–9) on Impairment of Step-Through Passive Avoidance Task Performance by Group II Metabotropic Glutamate Receptor-Related Drugs in Mice. J Pharmacol Sci 2005; 97:437-42. [PMID: 15764838 DOI: 10.1254/jphs.sc0040134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
To examine the effect of the arginine-vasopressin fragment, [pGlu(4),Cyt(6)]AVP((4-9)) (AVP4-9), on group II metabotropic glutamate receptor (mGluR2/3) agonist and antagonist induced impairment of passive avoidance (PA) task performance, AVP4-9 or phorbol 12-myristate 13-acetate (PMA) was administered in the presence of mGluR2/3-related drugs that induced the impairment of the step-through-type PA task performance. The PA task performance was evaluated in terms of the latency (the time that elapsed prior to entry into the dark compartment) at 24 h after the electrical stimulation. The subcutaneous injection of AVP4-9 at 1 mug/kg had the greatest facilitative effect on the performance, and the facilitative effect of AVP4-9 was inhibited by NPC-15437, a specific protein kinase C (PKC) inhibitor. The injection of AVP4-9 ameliorated PA task performance impairment induced by DCG-IV, an mGluR2/3 agonist. Intracisternal injection of PMA, a PKC activator, also ameliorated the DCG-IV-induced impairment. High doses of AVP4-9 exacerbated the PA task performance impairment induced by LY341495 (an mGluR2/3 antagonist), and PMA injection (1 mug) also exacerbated the impairment induced by the antagonist. These results suggest that an increase in the activity of the PKC-signaling pathway may not always facilitate PA task performance; therefore, AVP4-9 can either enhance or inhibit memory performance in mice.
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Affiliation(s)
- Tomoaki Sato
- Department of Applied Pharmacology, Kagoshima University Graduate School of Medical and Dental Sciences.
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