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Kale MB, Chandurkar PA, Taksande BG, Aglawe MM, Rahangdale SR, Upaganlawar AB, Kopalli SR, Umekar MJ, Wankhede NL. Agmatine alleviates ethanol withdrawal-associated cognitive impairment and neurochemical imbalance in rats. Neurosci Lett 2024; 832:137804. [PMID: 38692559 DOI: 10.1016/j.neulet.2024.137804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 04/25/2024] [Accepted: 04/28/2024] [Indexed: 05/03/2024]
Abstract
The present study aimed to investigate the role of agmatine in the neurobiology underlying memory impairment during ethanol withdrawal in rats. Sprague-Dawley rats were subjected to a 21-day chronic ethanol exposure regimen (2.4 % w/v ethanol for 3 days, 4.8 % w/v for the next 4 days, and 7.2 % w/v for the following 14 days), followed by a withdrawal period. Memory impairment was assessed using the passive avoidance test (PAT) at 24, 48, and 72 h post-withdrawal. The ethanol-withdrawn rats displayed a significant decrease in step-through latency in the PAT, indicative of memory impairment at 72 h post-withdrawal. However, administration of agmatine (40 µg/rat) and its modulators (L-arginine, arcaine, and amino-guanidine) significantly increases the latency time in the ethanol-withdrawn rats, demonstrating the attenuation of memory impairment. Further, pretreatment with imidazoline receptor agonists enhances agmatine's effects, while antagonists block them, implicating imidazoline receptors in agmatine's actions. Neurochemical analysis in ethanol-withdrawn rats reveals dysregulated glutamate and GABA levels, which was attenuated by agmatine and its modulators. By examining the effects of agmatine administration and modulators of endogenous agmatine, the study aimed to shed light on the potential therapeutic implications of agmatinergic signaling in alcohol addiction and related cognitive deficits. Thus, the present findings suggest that agmatine administration and modulation of endogenous agmatine levels hold potential as therapeutic strategies for managing alcohol addiction and associated cognitive deficits. Understanding the neurobiology underlying these effects paves the way for the development of novel interventions targeting agmatinergic signaling in addiction treatment.
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Affiliation(s)
- Mayur B Kale
- Division of Neuroscience, Smt. Kishoritai Bhoyar College of Pharmacy, Kamptee, Nagpur, Maharashtra 441002, India; SNJB's Shriman Sureshdada Jain College of Pharmacy, Neminagar, Chandwad, Nashik, Maharashtra 423101, India.
| | - Pranali A Chandurkar
- Division of Neuroscience, Smt. Kishoritai Bhoyar College of Pharmacy, Kamptee, Nagpur, Maharashtra 441002, India.
| | - Brijesh G Taksande
- Division of Neuroscience, Smt. Kishoritai Bhoyar College of Pharmacy, Kamptee, Nagpur, Maharashtra 441002, India.
| | - Manish M Aglawe
- Division of Neuroscience, Smt. Kishoritai Bhoyar College of Pharmacy, Kamptee, Nagpur, Maharashtra 441002, India.
| | - Sandip R Rahangdale
- Division of Neuroscience, Smt. Kishoritai Bhoyar College of Pharmacy, Kamptee, Nagpur, Maharashtra 441002, India.
| | - Aman B Upaganlawar
- SNJB's Shriman Sureshdada Jain College of Pharmacy, Neminagar, Chandwad, Nashik, Maharashtra 423101, India.
| | - Spandana R Kopalli
- Department of Integrated Bioscience and Biotechnology, Sejong University, Gwangjin-gu, Seoul 05006, Republic of Korea.
| | - Milind J Umekar
- Division of Neuroscience, Smt. Kishoritai Bhoyar College of Pharmacy, Kamptee, Nagpur, Maharashtra 441002, India.
| | - Nitu L Wankhede
- Division of Neuroscience, Smt. Kishoritai Bhoyar College of Pharmacy, Kamptee, Nagpur, Maharashtra 441002, India; SNJB's Shriman Sureshdada Jain College of Pharmacy, Neminagar, Chandwad, Nashik, Maharashtra 423101, India.
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Jovita-Farias C, Follett ME, Dias-Junior BC, Serra YA, Kisaki ND, Barros-Santos T, de Jesus NMS, Rodrigues IRS, Macedo LEL, Malpezzi-Marinho ELA, Oliveira-Lima AJ, Marinho EAV, Rowlett JK, Berro LF. Individual differences in the effects of midazolam on anxiety-like behavior, learning, reward, and choice behavior in male mice. Front Psychiatry 2023; 14:1122568. [PMID: 36937711 PMCID: PMC10021295 DOI: 10.3389/fpsyt.2023.1122568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 02/13/2023] [Indexed: 03/06/2023] Open
Abstract
Introduction The aim of the present study was to investigate the behavioral effects of the benzodiazepine midazolam in male mice, in models of anxiolysis, learning, and abuse-related effects. Methods In a first set of experiments, male Swiss mice were submitted to the training session of a discriminative avoidance (DA) task on the elevated plus maze to evaluate anxiety-like behavior and learning after vehicle or midazolam (1, 2 or 5 mg/kg, i.g.) administration. The same animals were submitted to a conditioned place preference (CPP) protocol with midazolam (1, 2 or 5 mg/kg, i.g.). In a second experiment, outbred (Swiss) and inbred (C57BL/6) male mice were submitted to a two-bottle choice (TBC) oral midazolam drinking procedure. Animals were exposed to one sucrose bottle and one midazolam (0.008, 0.016 or 0.032 mg/ml) plus sucrose bottle. Results Midazolam (1 and 2 mg/kg) induced anxiolytic-like effects, and all doses of midazolam prevented animals from learning to avoid the aversive closed arm during the DA training session. Assessment of midazolam reward via the CPP procedure and choice via the TBC procedure showed notable variability. A 2-step cluster analysis for the CPP data showed that midazolam data were well-fitted to 2 separate clusters (preference vs. aversion), albeit with the majority of mice showing preference (75%). Correlational and regression analyses showed no relationship between midazolam reward and anxiolytic-like effects (time spent in the open arms in the DA test) or learning/memory. Two-step cluster analysis of the TBC data also demonstrated that, regardless of strain, mice overall fell into two clusters identified as midazolam-preferring or midazolam-avoiding groups. Both midazolam preference and avoidance were concentration-dependent in a subset of mice. Discussion Our findings show that midazolam preference is a multifactorial behavior, and is not dependent solely on the emergence of therapeutic (anxiolytic-like) effects, learning impairments, or on genetic factors (inbred vs. outbred animals).
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Affiliation(s)
- Caio Jovita-Farias
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
| | - Meagan E. Follett
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, United States
| | - Behaim C. Dias-Junior
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
| | - Yasmim A. Serra
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
| | - Natali D. Kisaki
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
| | - Thaísa Barros-Santos
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
| | | | - Isa R. S. Rodrigues
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
| | - Larissa E. L. Macedo
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
| | | | | | | | - James K. Rowlett
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, United States
| | - Lais F. Berro
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, United States
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Paiva-Santos MA, Leão AHFF, Kurita JPF, Becegato MS, Lima AC, Bioni VS, Meurer YSR, Cunha DMG, Medeiros AM, Silva RH. Sex differences in the acute ethanol effects on object recognition memory: influence of estrous cycle. Behav Pharmacol 2022; 33:322-332. [PMID: 35502955 DOI: 10.1097/fbp.0000000000000680] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Effects of acute ethanol (EtOH) on memory depend on several factors, including type of behavioral task. Sex differences in EtOH effects have been reported in humans and animals, and recognition memory can be influenced by circulating sex hormones. The aim of this study was to investigate the influence of sex and estrous cycle in the acute effects of EtOH on novel object recognition memory in rats. Male and female Wistar rats were part of one of the groups: control, 0.6-g/kg EtOH and 1.8-g/kg EtOH (administered intraperitoneally before the training session). The estrous cycle was evaluated by vaginal smear. The task was conducted in an open field arena. During training, animals were exposed to two identical objects, and test sessions were performed 1 h (short-term) and 24 h (long-term) later. One of the objects was changed in each test. Increased novel object exploration was shown by male and female controls in the short- and long-term tests, respectively. In the short-term test, females did not show preference for the novel object, and EtOH 1.8 g/kg impaired performance in males. In the long-term test, both sexes showed object discrimination, and 1.8-g/kg EtOH reduced preference for the new object in male rats. The phase of the cycle, the performance on proestrus was worse compared with other phases, and EtOH failed to impair performance mainly on estrous. In conclusion, while male rats displayed ethanol-induced recognition memory deficit, female rats were unaffected by EtOH impairing effects. In addition, the performance of female rats was influenced by the estrous cycle phases.
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Affiliation(s)
| | | | - João P F Kurita
- Department of Pharmacology, Universidade Federal de São Paulo, São Paulo
| | - Marcela S Becegato
- Department of Pharmacology, Universidade Federal de São Paulo, São Paulo
| | - Alvaro C Lima
- Department of Pharmacology, Universidade Federal de São Paulo, São Paulo
| | - Vinicius S Bioni
- Department of Pharmacology, Universidade Federal de São Paulo, São Paulo
| | - Ywlliane S R Meurer
- Memory and Cognition Laboratory, Department of Psychology, Universidade Federal da Paraíba, João Pessoa
| | - Débora M G Cunha
- Department of Pharmacology, Universidade Federal de São Paulo, São Paulo
| | - André M Medeiros
- Department of Health Sciences, Center of Health and Biological Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, Brazil
| | - Regina H Silva
- Department of Pharmacology, Universidade Federal de São Paulo, São Paulo
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Rudge JD. A New Hypothesis for Alzheimer's Disease: The Lipid Invasion Model. J Alzheimers Dis Rep 2022; 6:129-161. [PMID: 35530118 PMCID: PMC9028744 DOI: 10.3233/adr-210299] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 02/05/2022] [Indexed: 02/07/2023] Open
Abstract
This paper proposes a new hypothesis for Alzheimer's disease (AD)-the lipid invasion model. It argues that AD results from external influx of free fatty acids (FFAs) and lipid-rich lipoproteins into the brain, following disruption of the blood-brain barrier (BBB). The lipid invasion model explains how the influx of albumin-bound FFAs via a disrupted BBB induces bioenergetic changes and oxidative stress, stimulates microglia-driven neuroinflammation, and causes anterograde amnesia. It also explains how the influx of external lipoproteins, which are much larger and more lipid-rich, especially more cholesterol-rich, than those normally present in the brain, causes endosomal-lysosomal abnormalities and overproduction of the peptide amyloid-β (Aβ). This leads to the formation of amyloid plaques and neurofibrillary tangles, the most well-known hallmarks of AD. The lipid invasion model argues that a key role of the BBB is protecting the brain from external lipid access. It shows how the BBB can be damaged by excess Aβ, as well as by most other known risk factors for AD, including aging, apolipoprotein E4 (APOE4), and lifestyle factors such as hypertension, smoking, obesity, diabetes, chronic sleep deprivation, stress, and head injury. The lipid invasion model gives a new rationale for what we already know about AD, explaining its many associated risk factors and neuropathologies, including some that are less well-accounted for in other explanations of AD. It offers new insights and suggests new ways to prevent, detect, and treat this destructive disease and potentially other neurodegenerative diseases.
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Affiliation(s)
- Jonathan D’Arcy Rudge
- School of Biological Sciences, University of Reading, Reading, Berkshire, United Kingdom
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Huang L, Peng Z, Lu C, Chen Y, Lv JW, Qin M, Liao DF, Liu XM, Shi Z. Ginsenoside Rg1 alleviates repeated alcohol exposure-induced psychomotor and cognitive deficits. Chin Med 2020; 15:44. [PMID: 32411290 PMCID: PMC7206760 DOI: 10.1186/s13020-020-00325-x] [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: 02/23/2020] [Accepted: 04/28/2020] [Indexed: 12/25/2022] Open
Abstract
Background Chronic alcohol consumption disrupts psychomotor and cognitive functions, most of which are subserved by the dysfunction of hippocampus. Dysregulated excitatory glutamatergic transmission is implicated in repeated alcohol induced psychomotor and cognitive impairment. Ginsenoside Rg1, one of the main active ingredient of the traditional tonic medicine Panax ginseng C.A. Meyer (Araliaceae), has been used to treat cognitive deficits. Particularly, Rg1 has been demonstrated to improve hippocampus-dependent learning in mice and attenuate glutamate-induced excitotoxicity in vitro. Thus, in the present research, we sought to investigate the therapeutic effects of Ginsenoside Rg1 on repeated alcohol induced psychomotor and cognitive deficits in hippocampal-dependent behavioral tasks and unravel the underpinnings of its neuroprotection. Methods Male ICR (CD-1) mice were consecutively intragastrically treated with 20% (w/v) alcohol for 21 days. Then, behavior tests were conducted to evaluate repeated alcohol induced psychomotor and cognitive deficits. Histopathological changes, and biochemical and molecular alterations were assessed to determine the potential neuroprotective mechanism of Rg1. Results The results suggested that Rg1, at the optimal dose of 6 mg/kg, has the potential to ameliorate repeated alcohol induced cognitive deficits by regulating activities of NR2B containing NMDARs and excitotoxic signaling. Conclusion Our findings further provided a new strategy to treat chronic alcohol exposure induced adverse consequences.
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Affiliation(s)
- Lu Huang
- 1Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, 410208 Hunan China.,2Guangdong-Hongkong-Macau Institute of CNS Regeneration, Ministry of Education CNS Regeneration Collaborative Joint Laboratory, Jinan University, Guangzhou, 510632 China
| | - Zhuang Peng
- 1Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, 410208 Hunan China.,5College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029 China
| | - Cong Lu
- 3Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193 China
| | - Ying Chen
- 4Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700 China
| | - Jing-Wei Lv
- 3Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193 China
| | - Meng Qin
- 5College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029 China
| | - Duan-Fang Liao
- 1Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, 410208 Hunan China
| | - Xin-Min Liu
- 1Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, 410208 Hunan China.,3Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193 China
| | - Zhe Shi
- 1Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, 410208 Hunan China
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Hippocampal nicotinic receptors have a modulatory role for ethanol and MDMA interaction in memory retrieval. Brain Res 2017; 1669:11-17. [DOI: 10.1016/j.brainres.2017.05.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Revised: 05/12/2017] [Accepted: 05/22/2017] [Indexed: 11/24/2022]
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Ofogh SN, Rezayof A, Sardari M, Ghasemzadeh Z. Basolateral amygdala CB1 cannabinoid receptors are involved in cross state-dependent memory retrieval between morphine and ethanol. Pharmacol Biochem Behav 2016; 148:92-8. [DOI: 10.1016/j.pbb.2016.06.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 06/01/2016] [Accepted: 06/17/2016] [Indexed: 11/30/2022]
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8
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More SV, Kumar H, Cho DY, Yun YS, Choi DK. Toxin-Induced Experimental Models of Learning and Memory Impairment. Int J Mol Sci 2016; 17:E1447. [PMID: 27598124 PMCID: PMC5037726 DOI: 10.3390/ijms17091447] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/24/2016] [Accepted: 08/25/2016] [Indexed: 02/07/2023] Open
Abstract
Animal models for learning and memory have significantly contributed to novel strategies for drug development and hence are an imperative part in the assessment of therapeutics. Learning and memory involve different stages including acquisition, consolidation, and retrieval and each stage can be characterized using specific toxin. Recent studies have postulated the molecular basis of these processes and have also demonstrated many signaling molecules that are involved in several stages of memory. Most insights into learning and memory impairment and to develop a novel compound stems from the investigations performed in experimental models, especially those produced by neurotoxins models. Several toxins have been utilized based on their mechanism of action for learning and memory impairment such as scopolamine, streptozotocin, quinolinic acid, and domoic acid. Further, some toxins like 6-hydroxy dopamine (6-OHDA), 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) and amyloid-β are known to cause specific learning and memory impairment which imitate the disease pathology of Parkinson's disease dementia and Alzheimer's disease dementia. Apart from these toxins, several other toxins come under a miscellaneous category like an environmental pollutant, snake venoms, botulinum, and lipopolysaccharide. This review will focus on the various classes of neurotoxin models for learning and memory impairment with their specific mechanism of action that could assist the process of drug discovery and development for dementia and cognitive disorders.
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Affiliation(s)
- Sandeep Vasant More
- Department of Biotechnology, College of Biomedical and Health Science, Konkuk University, Chungju 27478, Korea.
| | - Hemant Kumar
- Department of Biotechnology, College of Biomedical and Health Science, Konkuk University, Chungju 27478, Korea.
| | - Duk-Yeon Cho
- Department of Biotechnology, College of Biomedical and Health Science, Konkuk University, Chungju 27478, Korea.
| | - Yo-Sep Yun
- Department of Biotechnology, College of Biomedical and Health Science, Konkuk University, Chungju 27478, Korea.
| | - Dong-Kug Choi
- Department of Biotechnology, College of Biomedical and Health Science, Konkuk University, Chungju 27478, Korea.
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Alterations in the hippocampal phosphorylated CREB expression in drug state-dependent learning. Behav Brain Res 2015; 292:109-15. [PMID: 26055203 DOI: 10.1016/j.bbr.2015.06.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 06/01/2015] [Accepted: 06/03/2015] [Indexed: 01/08/2023]
Abstract
The present study investigated the possible alterations of hippocampal CREB phosphorylation in drug state-dependent memory retrieval. One-trial step-down passive avoidance task was used to assess memory retrieval in adult male NMRI mice. Pre-training administration of ethanol (1g/kg, i.p.) induced amnesia. Pre-test administration of ethanol (1g/kg, i.p) or nicotine (0.7 mg/kg, s.c.) reversed ethanol-induced amnesia, indicating ethanol- or ethanol-nicotine induced state-dependent learning (STD). Using Western blot analysis, it was found that the p-CREB/CREB ratio in the hippocampus increased in the mice that showed successful memory retrieval as compared with untrained mice. In contrast, pre-training administration of ethanol (1g/kg, i.p.) decreased the hippocampal p-CREB/CREB ratio in comparison with the control group. The hippocampal p-CREB/CREB ratio enhanced in ethanol- and ethanol-nicotine induced STD. Moreover, memory impairment induced by pre-training administration of WIN (1 mg/kg, i.p.) improved in the animals that received pre-test administration of WIN (1 mg/kg, i.p.), ethanol (0.5 g/kg, i.p.) or nicotine (0.7 mg/kg, s.c.), suggesting a cross STD between the drugs. The p-CREB/CREB ratio in the hippocampus decreased in the of WIN-induced amnesia and STD groups in comparison with the control group. In addition, cross state-dependent learning between WIN and ethanol or nicotine was associated with the increase of the hippocampal p-CREB/CREB ratio. It can be concluded that phosphorylation of CREB in the hippocampus is a critical event underlying the interaction of co-administration of drugs on memory retrieval in passive avoidance learning.
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Marinho EAV, Oliveira-Lima AJ, Santos R, Hollais AW, Baldaia MA, Wuo-Silva R, Yokoyama TS, Takatsu-Coleman AL, Patti CL, Longo BM, Berro LF, Frussa-Filho R. Effects of rimonabant on the development of single dose-induced behavioral sensitization to ethanol, morphine and cocaine in mice. Prog Neuropsychopharmacol Biol Psychiatry 2015; 58:22-31. [PMID: 25496830 DOI: 10.1016/j.pnpbp.2014.11.010] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 11/01/2014] [Accepted: 11/18/2014] [Indexed: 11/19/2022]
Abstract
RATIONALE The endocannabinoid system has been implicated in the neurobiological mechanism underlying drug addiction, especially the primary rewarding dopamine-dependent processes. Therefore, endocannabinoid receptor antagonists, such as the CB1 cannabinoid antagonist rimonabant, have been proposed as candidates for preventive addiction therapies. OBJECTIVES Investigate the possible involvement of CB1 receptors in the development of behavioral sensitization to ethanol, morphine and cocaine in mice. METHODS We compared the effects of different doses of rimonabant (0.3, 1, 3 and 10mg/kg) on spontaneous locomotor activity in the open-field, hyperlocomotion induced by acute administration of ethanol (1.8g/kg), morphine (20mg/kg) or cocaine (10mg/kg) and on subsequent drug-induced locomotor sensitization using a two-injection protocol in mice. We also investigated a possible depressive-like effect of an acute rimonabant challenge at the highest dose and its potential anxiogenic property. RESULTS At the highest dose, rimonabant abolished ethanol- and cocaine-induced hyperlocomotion and behavioral sensitization without modifying spontaneous and central locomotor activity or inducing depressive-like behavior on the forced swim test in mice. The other doses of rimonabant also selectively blocked acute ethanol-induced central hyperlocomotion. Although rimonabant at 0.3 and 1mg/kg potentiated the central hyperlocomotion induced by acute morphine injection, it was effective in attenuating morphine-induced behavioral sensitization at all doses. CONCLUSIONS Because the neural basis of behavioral sensitization has been proposed to correspond to some components of addiction, our findings indicate that the endocannabinoid system might be involved in ethanol, cocaine and morphine abuse.
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Affiliation(s)
- Eduardo A V Marinho
- Departamento de Ciências da Saúde, Universidade Estadual de Santa Cruz - UESC, Ilhéus, BA, Brazil.
| | | | - Renan Santos
- Departamento de Fisiologia, Universidade Federal de São Paulo - UNIFESP, São Paulo, SP, Brazil
| | - André W Hollais
- Departamento de Fisiologia, Universidade Federal de São Paulo - UNIFESP, São Paulo, SP, Brazil
| | - Marilia A Baldaia
- Departamento de Farmacologia, Universidade Federal de São Paulo - UNIFESP, São Paulo, SP, Brazil
| | - Raphael Wuo-Silva
- Departamento de Fisiologia, Universidade Federal de São Paulo - UNIFESP, São Paulo, SP, Brazil
| | - Thais S Yokoyama
- Departamento de Fisiologia, Universidade Federal de São Paulo - UNIFESP, São Paulo, SP, Brazil
| | - André L Takatsu-Coleman
- Departamento de Psicobiologia, Universidade Federal de São Paulo - UNIFESP, São Paulo, SP, Brazil
| | - Camilla L Patti
- Departamento de Farmacologia, Universidade Federal de São Paulo - UNIFESP, São Paulo, SP, Brazil
| | - Beatriz M Longo
- Departamento de Fisiologia, Universidade Federal de São Paulo - UNIFESP, São Paulo, SP, Brazil; Departamento de Farmacologia, Universidade Federal de São Paulo - UNIFESP, São Paulo, SP, Brazil
| | - Laís F Berro
- Departamento de Psicobiologia, Universidade Federal de São Paulo - UNIFESP, São Paulo, SP, Brazil.
| | - Roberto Frussa-Filho
- Departamento de Farmacologia, Universidade Federal de São Paulo - UNIFESP, São Paulo, SP, Brazil; Departamento de Psicobiologia, Universidade Federal de São Paulo - UNIFESP, São Paulo, SP, Brazil
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11
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Oliveira-Lima A, Santos R, Hollais A, Gerardi-Junior C, Baldaia M, Wuo-Silva R, Yokoyama T, Costa J, Malpezzi-Marinho E, Ribeiro-Barbosa P, Berro L, Frussa-Filho R, Marinho E. Effects of ayahuasca on the development of ethanol-induced behavioral sensitization and on a post-sensitization treatment in mice. Physiol Behav 2015; 142:28-36. [DOI: 10.1016/j.physbeh.2015.01.032] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 01/11/2015] [Accepted: 01/26/2015] [Indexed: 01/14/2023]
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12
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Tipps ME, Raybuck JD, Buck KJ, Lattal KM. Acute ethanol withdrawal impairs contextual learning and enhances cued learning. Alcohol Clin Exp Res 2015; 39:282-90. [PMID: 25684050 PMCID: PMC4331355 DOI: 10.1111/acer.12614] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 10/24/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND Alcohol affects many of the brain regions and neural processes that support learning and memory, and these effects are thought to underlie, at least in part, the development of addiction. Although much work has been done regarding the effects of alcohol intoxication on learning and memory, little is known about the effects of acute withdrawal from a single alcohol exposure. METHODS We assess the effects of acute ethanol withdrawal (6 hours postinjection with 4 g/kg ethanol) on 2 forms of fear conditioning (delay and trace fear conditioning) in C57BL/6J and DBA/2J mice. The influence of a number of experimental parameters (pre- and post training withdrawal exposure; foreground/background processing; training strength; and nonassociative effects) is also investigated. RESULTS Acute ethanol withdrawal during training had a bidirectional effect on fear-conditioned responses, decreasing contextual responses and increasing cued responses. These effects were apparent for both trace and delay conditioning in DBA/2J mice and for trace conditioning in C57BL/6J mice; however, C57BL/6J mice were selectively resistant to the effects of acute withdrawal on delay cued responses. CONCLUSIONS Our results show that acute withdrawal from a single, initial ethanol exposure is sufficient to alter long-term learning in mice. In addition, the differences between the strains and conditioning paradigms used suggest that specific learning processes can be differentially affected by acute withdrawal in a manner that is distinct from the reported effects of both alcohol intoxication and withdrawal following chronic alcohol exposure. Thus, our results suggest a unique effect of acute alcohol withdrawal on learning and memory processes.
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Affiliation(s)
- Megan E. Tipps
- Portland Alcohol Research Center; Portland VA Medical Center 3710 SW US Veterans Hospital Rd., Bld 104 Portland, OR 97239-3098, USA
- Department of Behavioral Neuroscience; Oregon Health & Science University 3181 SW Sam Jackson Park Rd. Portland, OR 97239-3098, USA
| | - Jonathan D. Raybuck
- Department of Behavioral Neuroscience; Oregon Health & Science University 3181 SW Sam Jackson Park Rd. Portland, OR 97239-3098, USA
| | - Kari J. Buck
- Portland Alcohol Research Center; Portland VA Medical Center 3710 SW US Veterans Hospital Rd., Bld 104 Portland, OR 97239-3098, USA
- Department of Behavioral Neuroscience; Oregon Health & Science University 3181 SW Sam Jackson Park Rd. Portland, OR 97239-3098, USA
| | - K. Matthew Lattal
- Department of Behavioral Neuroscience; Oregon Health & Science University 3181 SW Sam Jackson Park Rd. Portland, OR 97239-3098, USA
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13
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Moderate prenatal alcohol exposure alters behavior and neuroglial parameters in adolescent rats. Behav Brain Res 2014; 269:175-84. [DOI: 10.1016/j.bbr.2014.04.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 03/18/2014] [Accepted: 04/14/2014] [Indexed: 11/21/2022]
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Talhati F, Patti CL, Zanin KA, Lopes-Silva LB, Ceccon LMB, Hollais AW, Bizerra CS, Santos R, Tufik S, Frussa-Filho R. Food restriction increases long-term memory persistence in adult or aged mice. Prog Neuropsychopharmacol Biol Psychiatry 2014; 50:125-36. [PMID: 24361378 DOI: 10.1016/j.pnpbp.2013.12.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2013] [Revised: 12/11/2013] [Accepted: 12/11/2013] [Indexed: 12/30/2022]
Abstract
Food restriction (FR) seems to be the unique experimental manipulation that leads to a remarkable increase in lifespan in rodents. Evidences have suggested that FR can enhance memory in distinct animal models mainly during aging. However, only few studies systemically evaluated the effects FR on memory formation in both adult (3-month-old) and aged (18-24-month-old) mice. Thus, the aim of the present study was to investigate the effects of acute (12h) or repeated (12h/day for 2days) FR protocols on learning and memory of adult and aged mice evaluated in the plus-maze discriminative avoidance task (PM-DAT), an animal model that concurrently (but independently) evaluates learning and memory, anxiety and locomotion. We also investigated the possible role of FR-induced stress by the corticosterone concentration in adult mice. Male mice were kept at home cage with food ad libitum (CTRL-control condition) or subjected to FR during the dark phase of the cycle for 12h/day or 12h/2days. The FR protocols were applied before training, immediately after it or before testing. Our results demonstrated that only FR for 2days enhanced memory persistence when applied before training in adults and before testing in aged mice. Conversely, FR for 2days impaired consolidation and exerted no effects on retrieval irrespective of age. These effects do not seem to be related to corticosterone concentration. Collectively, these results indicate that FR for 2days can promote promnestic effects not only in aged mice but also in adults.
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Affiliation(s)
- F Talhati
- Departamento de Farmacologia, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1° andar, 04023062, São Paulo, SP, Brazil
| | - C L Patti
- Departamento de Farmacologia, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1° andar, 04023062, São Paulo, SP, Brazil.
| | - K A Zanin
- Departamento de Farmacologia, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1° andar, 04023062, São Paulo, SP, Brazil; Departamento de Psicobiologia, Universidade Federal de São Paulo, R. Napoleão de Barros, 925, 04024002, São Paulo, SP, Brazil
| | - L B Lopes-Silva
- Departamento de Farmacologia, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1° andar, 04023062, São Paulo, SP, Brazil; Departamento de Psicobiologia, Universidade Federal de São Paulo, R. Napoleão de Barros, 925, 04024002, São Paulo, SP, Brazil
| | - L M B Ceccon
- Departamento de Farmacologia, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1° andar, 04023062, São Paulo, SP, Brazil
| | - A W Hollais
- Departamento de Farmacologia, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1° andar, 04023062, São Paulo, SP, Brazil
| | - C S Bizerra
- Departamento de Farmacologia, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1° andar, 04023062, São Paulo, SP, Brazil
| | - R Santos
- Departamento de Farmacologia, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1° andar, 04023062, São Paulo, SP, Brazil
| | - S Tufik
- Departamento de Psicobiologia, Universidade Federal de São Paulo, R. Napoleão de Barros, 925, 04024002, São Paulo, SP, Brazil
| | - R Frussa-Filho
- Departamento de Farmacologia, Universidade Federal de São Paulo, R. Botucatu, 862, Ed. Leal Prado, 1° andar, 04023062, São Paulo, SP, Brazil
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Abstract
Caffeine is the most widely used psychoactive substance in the world and it is generally believed that it promotes beneficial effects on cognitive performance. However, there is also evidence suggesting that caffeine has inhibitory effects on learning and memory. Considering that caffeine may have anxiogenic effects, thus changing the emotional state of the subjects, state-dependent learning may play a role in caffeine-induced cognitive alterations. Mice were administered 20 mg/kg caffeine before training and/or before testing both in the plus-maze discriminative avoidance task (an animal model that concomitantly evaluates learning, memory, anxiety-like behaviour and general activity) and in the inhibitory avoidance task, a classic paradigm for evaluating memory in rodents. Pre-training caffeine administration did not modify learning, but produced an anxiogenic effect and impaired memory retention. While pre-test administration of caffeine did not modify retrieval on its own, the pre-test administration counteracted the memory deficit induced by the pre-training caffeine injection in both the plus-maze discriminative and inhibitory avoidance tasks. Our data demonstrate that caffeine-induced memory deficits are critically related to state-dependent learning, reinforcing the importance of considering the participation of state-dependency on the interpretation of the cognitive effects of caffeine. The possible participation of caffeine-induced anxiety alterations in state-dependent memory deficits is discussed.
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