51
|
Carter F, Chapman CA. Serotonin 5-HT 1A Receptor-Mediated Reduction of Excitatory Synaptic Transmission in Layers II/III of the Parasubiculum. Neuroscience 2019; 406:325-332. [PMID: 30902681 DOI: 10.1016/j.neuroscience.2019.03.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 02/25/2019] [Accepted: 03/11/2019] [Indexed: 12/26/2022]
Abstract
Serotonin (5-HT) has important effects on cognitive function within the hippocampal region where it modulates membrane potential and excitatory and inhibitory synaptic transmission. Here, we investigated how 5-HT modulates excitatory synaptic strength in layers II/III of the parasubiculum in rat brain slices. Bath-application of 1 or 10 μM 5-HT resulted in a strong, dose-dependent, and reversible reduction in the amplitude of field excitatory postsynaptic potentials (fEPSPs) recorded in the parasubiculum. The 5-HT reuptake blocker citalopram (10 μM) also reduced fEPSP amplitudes, indicating that 5-HT released within the slice inhibits synaptic transmission. The reduction of fEPSPs induced by 5-HT was blocked by the 5-HT1A receptor blocker NAN-190 (10 μM), but not by the 5-HT7 receptor blocker SB-269970 (10 μM). Moreover, the 5-HT1A agonist 8-OH-DPAT induced a reduction of fEPSP amplitude similar to that induced by 5-HT. The reduction was prevented by the 5-HT1A receptor blocker NAN-190. The reduction in fEPSPs induced by either 5-HT or by 8-OH-DPAT was accompanied by an increase in paired-pulse ratio, suggesting that it is due mainly to reduced glutamate release. Our data suggest that the effects of serotonin on cognitive function may depend in part upon a 5-HT1A-mediated reduction of excitatory synaptic transmission in the parasubiculum. This may also affect synaptic processing in the entorhinal cortex, which receives the major output projection of the parasubiculum.
Collapse
Affiliation(s)
- Francis Carter
- Center for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, Québec, Canada H4B 1R6
| | - C Andrew Chapman
- Center for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, Québec, Canada H4B 1R6.
| |
Collapse
|
52
|
Blattner KM, Canney DJ, Pippin DA, Blass BE. Pharmacology and Therapeutic Potential of the 5-HT 7 Receptor. ACS Chem Neurosci 2019; 10:89-119. [PMID: 30020772 DOI: 10.1021/acschemneuro.8b00283] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
It is well-documented that serotonin (5-HT) exerts its pharmacological effects through a series of 5-HT receptors. The most recently identified member of this family, 5-HT7, was first identified in 1993. Over the course of the last 25 years, this receptor has been the subject of intense investigation, and it has been demonstrated that 5-HT7 plays an important role in a wide range of pharmacological processes. As a result of these findings, modulation of 5-HT7 activity has been the focus of numerous drug discovery and development programs. This review provides an overview of the roles of 5-HT7 in normal physiology and the therapeutic potential of this interesting drug target.
Collapse
Affiliation(s)
- Kevin M. Blattner
- Temple University School of Pharmacy, Department of Pharmaceutical Sciences, Moulder Center for Drug Discovery Research, 3307 North Broad Street, Philadelphia, Pennsylvania 19140, United States
| | - Daniel J. Canney
- Temple University School of Pharmacy, Department of Pharmaceutical Sciences, Moulder Center for Drug Discovery Research, 3307 North Broad Street, Philadelphia, Pennsylvania 19140, United States
| | - Douglas A. Pippin
- Praeventix, LLC, 665 Stockton Drive, Suite 200H, Exton, Pennsylvania 19341, United States
| | - Benjamin E. Blass
- Temple University School of Pharmacy, Department of Pharmaceutical Sciences, Moulder Center for Drug Discovery Research, 3307 North Broad Street, Philadelphia, Pennsylvania 19140, United States
| |
Collapse
|
53
|
Wideman CE, Jardine KH, Winters BD. Involvement of classical neurotransmitter systems in memory reconsolidation: Focus on destabilization. Neurobiol Learn Mem 2018; 156:68-79. [DOI: 10.1016/j.nlm.2018.11.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 10/09/2018] [Accepted: 11/01/2018] [Indexed: 10/27/2022]
|
54
|
Sandgren AM, Brummer RJ. ADHD-originating in the gut? The emergence of a new explanatory model. Med Hypotheses 2018; 120:135-145. [DOI: 10.1016/j.mehy.2018.08.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 08/25/2018] [Indexed: 12/12/2022]
|
55
|
Choi SH, Lee AY, Park CH, Shin YS, Cho EJ. Protective effect of Carthamus tinctorius L. seed on oxidative stress and cognitive impairment induced by chronic alcohol consumption in mice. Food Sci Biotechnol 2018; 27:1475-1484. [PMID: 30319858 DOI: 10.1007/s10068-018-0472-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 09/07/2018] [Accepted: 09/11/2018] [Indexed: 12/23/2022] Open
Abstract
Chronic alcohol consumption induces damage to the brain that can cause various forms of dementia. An abundance of acetaldehyde is produced by excessive alcohol consumption and accumulates in the body to induce oxidative stress, apoptosis, and inflammation in neuronal cells, which results in learning and cognitive decline. In the present study, C57BL/N mice were orally administered alcohol (16%) and Carthamus tinctorius L. seed (CTS) (100 and 200 mg/kg/day). Behavioral experiments showed that memory and cognitive abilities were significantly higher in the CTS groups than the alcohol-treated control group in the T-maze test, novel object recognition test, and Morris water maze test. In addition, CTS inhibited alcohol-induced lipid peroxidation and nitric oxide production in the brain, kidney, and liver. Moreover, alcohol increased acetylcholinesterase activity in the brain, but this was significantly decreased by the administration of CTS. Therefore, CTS may play role in the prevention of alcohol-related dementia.
Collapse
Affiliation(s)
- Seung Hak Choi
- 1Department of Food Science and Nutrition, and Kimchi Research Institute, Pusan National University, Busan, 46241 Republic of Korea
| | - Ah Young Lee
- 1Department of Food Science and Nutrition, and Kimchi Research Institute, Pusan National University, Busan, 46241 Republic of Korea
| | - Chan Hum Park
- 2Department of Medicinal Crop Research, National Institute of Horticultural and Herbal Science, Rural Development Administration, Eumseong, 27709 Republic of Korea
| | - Yu Su Shin
- 2Department of Medicinal Crop Research, National Institute of Horticultural and Herbal Science, Rural Development Administration, Eumseong, 27709 Republic of Korea
| | - Eun Ju Cho
- 1Department of Food Science and Nutrition, and Kimchi Research Institute, Pusan National University, Busan, 46241 Republic of Korea
| |
Collapse
|
56
|
Hicks AJ, Clay FJ, Hopwood M, James AC, Jayaram M, Batty R, Perry LA, Ponsford JL. Efficacy and Harms of Pharmacological Interventions for Neurobehavioral Symptoms in Post-Traumatic Amnesia after Traumatic Brain Injury: A Systematic Review. J Neurotrauma 2018; 35:2755-2775. [PMID: 29969935 DOI: 10.1089/neu.2018.5738] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Many individuals in post-traumatic amnesia (PTA) following traumatic brain injury (TBI) experience neurobehavioral symptoms (NBS) in addition to disorientation and amnesia. These symptoms are associated with low rehabilitation engagement, self-inflicted harm, and risk of violence. The aim of this systematic review was to evaluate the efficacy and harms of pharmacological interventions for NBS in PTA following TBI in adults. Studies in English published before December 2017 were reviewed. Six databases were searched, with additional hand searching of key journals, clinical trials registries, and international drug regulators. Evidence quality was assessed using Joanna Briggs Institute Critical Appraisal Instruments. Thirteen studies were identified: three randomized controlled trials (RCTs), three cohort studies, and seven case series. In the RCTs, neither amantadine nor sertraline reduced NBS. Less rigorous studies reported reduced NBS in patients administered haloperidol, ziprasidone, carbamazepine, amitriptyline, desipramine, and varied neuroleptics. There is a paucity of well-designed, adequately powered and controlled studies of pharmacological interventions for NBS in PTA. More research is needed to provide evidence-based treatment recommendations and improve care.
Collapse
Affiliation(s)
- Amelia J Hicks
- 1 Monash-Epworth Rehabilitation Research Centre, Monash Institute of Cognitive and Clinical Neurosciences, School of Psychological Sciences, Monash University, Melbourne, Australia
| | - Fiona J Clay
- 2 Department of Psychiatry, University of Melbourne, Melbourne, Australia .,3 Department of Forensic Medicine, Monash University, Southbank, Melbourne, Australia .,4 Professorial Psychiatry Unit, Albert Road Clinic, Department of Psychiatry, University of Melbourne, Melbourne, Australia
| | - Malcolm Hopwood
- 2 Department of Psychiatry, University of Melbourne, Melbourne, Australia .,4 Professorial Psychiatry Unit, Albert Road Clinic, Department of Psychiatry, University of Melbourne, Melbourne, Australia
| | - Amelia C James
- 1 Monash-Epworth Rehabilitation Research Centre, Monash Institute of Cognitive and Clinical Neurosciences, School of Psychological Sciences, Monash University, Melbourne, Australia
| | - Mahesh Jayaram
- 2 Department of Psychiatry, University of Melbourne, Melbourne, Australia
| | - Rachel Batty
- 2 Department of Psychiatry, University of Melbourne, Melbourne, Australia
| | - Luke A Perry
- 2 Department of Psychiatry, University of Melbourne, Melbourne, Australia
| | - Jennie L Ponsford
- 1 Monash-Epworth Rehabilitation Research Centre, Monash Institute of Cognitive and Clinical Neurosciences, School of Psychological Sciences, Monash University, Melbourne, Australia
| |
Collapse
|
57
|
Usuda K, Kawase T, Shigeno Y, Fukuzawa S, Fujii K, Zhang H, Tsukahara T, Tomonaga S, Watanabe G, Jin W, Nagaoka K. Hippocampal metabolism of amino acids by L-amino acid oxidase is involved in fear learning and memory. Sci Rep 2018; 8:11073. [PMID: 30038322 PMCID: PMC6056520 DOI: 10.1038/s41598-018-28885-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 07/02/2018] [Indexed: 12/18/2022] Open
Abstract
Amino acids participate directly and indirectly in many important biochemical functions in the brain. We focused on one amino acid metabolic enzyme, L-amino acid oxidase (LAO), and investigated the importance of LAO in brain function using LAO1 knockout (KO) mice. Compared to wild-type mice, LAO1 KO mice exhibited impaired fear learning and memory function in a passive avoidance test. This impairment in LAO1 KO mice coincided with significantly reduced hippocampal acetylcholine levels compared to wild-type mice, while treatment with donepezil, a reversible acetylcholine esterase inhibitor, inhibited this reduction. Metabolomic analysis revealed that knocking out LAO1 affected amino acid metabolism (mainly of phenylalanine [Phe]) in the hippocampus. Specifically, Phe levels were elevated in LAO1 KO mice, while phenylpyruvic acid (metabolite of Phe produced largely by LAO) levels were reduced. Moreover, knocking out LAO1 decreased hippocampal mRNA levels of pyruvate kinase, the enzymatic activity of which is known to be inhibited by Phe. Based on our findings, we propose that LAO1 KO mice exhibited impaired fear learning and memory owing to low hippocampal acetylcholine levels. Furthermore, we speculate that hippocampal Phe metabolism is an important physiological mechanism related to glycolysis and may underlie cognitive impairments, including those observed in Alzheimer's disease.
Collapse
Affiliation(s)
- Kento Usuda
- United Graduate School of Veterinarian Science, Gifu University, Gifu, Gifu, Japan.,Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Takahiro Kawase
- Kyoto Institute of Nutrition and Pathology, Tsuzuki, Kyoto, Japan
| | - Yuko Shigeno
- Laboratory of Benno, RIKEN Innovation Center, Wako, Saitama, Japan
| | - Susumu Fukuzawa
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Kazuki Fujii
- Life Science Research Center, Toyama University, Toyama, Toyama, Japan
| | - Haolin Zhang
- College of Biological Science and Technology, Beijing Forestry University, Haidian, Beijing, China
| | | | - Shozo Tomonaga
- Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University, Kyoto, Kyoto, Japan
| | - Gen Watanabe
- United Graduate School of Veterinarian Science, Gifu University, Gifu, Gifu, Japan.,Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Wanzhu Jin
- Institute of Zoology, Chinese Academy of Sciences, Chaoyang, Beijing, China
| | - Kentaro Nagaoka
- United Graduate School of Veterinarian Science, Gifu University, Gifu, Gifu, Japan. .,Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan.
| |
Collapse
|
58
|
Ma J, Yan H, Wang R, Bo S, Lu X, Zhang J, Xu A. Protective effect of carnosine on white matter damage in corpus striatum induced by chronic cerebral hypoperfusion. Neurosci Lett 2018; 683:54-60. [PMID: 29928953 DOI: 10.1016/j.neulet.2018.06.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 05/25/2018] [Accepted: 06/17/2018] [Indexed: 11/27/2022]
Abstract
Subcortical ischemic vascular dementia caused by chronic cerebral hypoperfusion due to small-artery disease is a common subtype of vascular dementia, which is recognized as the second most prevalent type of dementia. The aim of this study was to determine the effect of carnosine on white matter damage in corpus striatum. Adult male mice (C57BL/6 strain) were subjected to right unilateral common carotid arteries occlusion (rUCCAO), and treated with carnosine or saline. Klüver-Barrera staining, immunohistochemical analyses, Western blots and neurochemical analysis were performed after rUCCAO. The white matter in corpus striatum was damaged at day 37 after rUCCAO, which was largely rescued by carnosine (200, 500 mg/kg). Carnosine (200, 500 mg/kg) significantly recovered the expression of myelin basic protein, suppressed the activation of microglia and reversed the decrease of 5-hydroxytryptamine and dopamine levels in corpus striatum. Moreover, carnosine (200, 500 mg/kg) significantly inhibited the apoptosis in corpus striatum. These data suggest that carnosine has the neuroprotective effect in corpus striatum on rUCCAO in mice, may be due to its protection of neurotransmitters and inhibition of apoptosis.
Collapse
Affiliation(s)
- Jing Ma
- Department of Pharmacy, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200092, China.
| | - Haijing Yan
- Institute for Metabolic and Neuropsychiatric Disorders, Binzhou Medical University Hospital, Binzhou, China
| | - Ranran Wang
- Department of Pharmacy, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200092, China
| | - Shuhong Bo
- Department of Pharmacy, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200092, China
| | - Xiaotong Lu
- Department of Pharmacy, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200092, China
| | - Jian Zhang
- Department of Pharmacy, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200092, China
| | - Ajing Xu
- Department of Pharmacy, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200092, China.
| |
Collapse
|
59
|
Nikitin VP, Solntseva SV, Kozyrev SA, Nikitin PV, Shevelkin AV. NMDA or 5-HT receptor antagonists impair memory reconsolidation and induce various types of amnesia. Behav Brain Res 2018; 345:72-82. [PMID: 29499285 DOI: 10.1016/j.bbr.2018.02.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Revised: 02/10/2018] [Accepted: 02/26/2018] [Indexed: 12/12/2022]
Abstract
Elucidation of amnesia mechanisms is one of the central problems in neuroscience with immense practical application. Previously, we found that conditioned food presentation combined with injection of a neurotransmitter receptor antagonist or protein synthesis inhibitor led to amnesia induction. In the present study, we investigated the time course and features of two amnesias: induced by impairment of memory reconsolidation using an NMDA glutamate receptor antagonist (MK-801) and a serotonin receptor antagonist (methiothepin, MET) on snails trained with food aversion conditioning. During the early period of amnesia (<10th day), the unpaired presentation of conditioned stimuli (CS) or unconditioned stimuli (US) in the same training context did not have an effect on both types of amnesia. Retraining an on 1st or 3rd day of amnesia induction facilitated memory formation, i.e. the number of CS + US pairings was lower than at initial training. On the 10th or 30th day after the MET/reminder, the number of CS + US pairings did not change between initial training and retraining. Retraining on the 10th or 30th day following the MK-801/reminder in the same or a new context of learning resulted in short, but not long-term, memory, and the number of CS + US pairings was higher than at the initial training. This type of amnesia was specific to the CS we used at initial training, since long-term memory for another kind of CS could be formed in the same snails. The attained results suggest that disruption of memory reconsolidation using antagonists of serotonin or NMDA glutamate receptors induced amnesias with different abilities to form long-term memory during the late period of development.
Collapse
Affiliation(s)
- V P Nikitin
- P.K. Anokhin Institute of Normal Physiology, Moscow, Russian Federation.
| | - S V Solntseva
- P.K. Anokhin Institute of Normal Physiology, Moscow, Russian Federation
| | - S A Kozyrev
- P.K. Anokhin Institute of Normal Physiology, Moscow, Russian Federation
| | - P V Nikitin
- P.K. Anokhin Institute of Normal Physiology, Moscow, Russian Federation; Burdenko Neurosurgical Institute, Moscow, Russian Federation
| | - A V Shevelkin
- Department of Psychiatry and Behavioral Sciences, John Hopkins University School of Medicine, Baltimore, MD
| |
Collapse
|
60
|
王 晶, 李 春, 白 璐, 唐 强, 张 瑞, Han TL, 郭 玉, Philip N, 夏 茵, 涂 白. [Changes of cerebral cortical metabolomics in rats following benzo[a]pyrene exposure]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2018; 38:162-167. [PMID: 29502054 PMCID: PMC6743872 DOI: 10.3969/j.issn.1673-4254.2018.02.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To analyze the changes in endogenous small molecule metabolites after benzo[a]pyrene (B[a]P) exposure in rat cerebral cortex and explore the mechanism of B[a]P neurotoxicity. METHODS Five-day-old SD rats were subjected to gavage administration of 2 mg/kg B[a]P for 7 consecutive weeks. After the exposure, the rats were assessed for spatial learning ability using Morris water maze test, ultrastructural changes of the cortical neurons under electron microscope, and metabolite profiles of the cortex using GC/MS. The differential metabolites between the exposed and control rats were identified with partial least squares discriminant analysis (PLS-DA) and the metabolic pathways related with the differential metabolites were analyzed using Cytoscape software. RESULTS Compared with the control group, the rats exposed to B[a]P showed significantly increased escape latency (P<0.05) and decreased time spent in the target area (P<0.05). The exposed rats exhibited widened synaptic cleft, thickened endplate membrane and swollen cytoplasm compared with the control rats. Eighteen differential metabolites (VIP>1, P<0.05) in the cortex were identified between the two groups, and 9 pathways associated with B[a]P neurotoxicity were identified involving amino acid metabolism, tricarboxylic acid cycle and Vitamin B3 (niacin and nicotinamide) metabolism. CONCLUSION B[a]P can cause disturbance in normal metabolisms and its neurotoxicity is possibly related with disorders in amino acid metabolism, tricarboxylic acid cycle and vitamin metabolism.
Collapse
Affiliation(s)
- 晶 王
- 重庆医科大学公共卫生与管理学院//医学与社会发展研究中心//健康领域社会风险预测治理协同创新中心,重庆 400016Department of Occupational and Environmental Hygiene, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing 400016, China
| | - 春林 李
- 重庆医科大学公共卫生与管理学院//医学与社会发展研究中心//健康领域社会风险预测治理协同创新中心,重庆 400016Department of Occupational and Environmental Hygiene, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing 400016, China
| | - 璐璐 白
- 重庆医科大学公共卫生与管理学院//医学与社会发展研究中心//健康领域社会风险预测治理协同创新中心,重庆 400016Department of Occupational and Environmental Hygiene, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing 400016, China
| | - 强虎 唐
- 重庆医科大学公共卫生与管理学院//医学与社会发展研究中心//健康领域社会风险预测治理协同创新中心,重庆 400016Department of Occupational and Environmental Hygiene, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing 400016, China
| | - 瑞源 张
- 重庆医科大学公共卫生与管理学院//医学与社会发展研究中心//健康领域社会风险预测治理协同创新中心,重庆 400016Department of Occupational and Environmental Hygiene, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing 400016, China
| | - Ting-Li Han
- 奥克兰大学里金斯研究所,奥克兰 新西兰Liggins Institute, University of Auckland, Auckland, New Zealand
| | - 玉明 郭
- 昆士兰大学人口健康学院流行病学和生物统计学系,布里斯班 澳大利亚Department of Epidemiology and Biostatistics, School of Population Health, University of Queensland, Brisbane, Australia
| | - N.Baker Philip
- 莱斯特大学医学院生物科学与心理学院,英国College of Medicine, Biological Sciences and Psychology, University of Leicester, UK
| | - 茵茵 夏
- 重庆医科大学公共卫生与管理学院//医学与社会发展研究中心//健康领域社会风险预测治理协同创新中心,重庆 400016Department of Occupational and Environmental Hygiene, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing 400016, China
| | - 白杰 涂
- 重庆医科大学公共卫生与管理学院//医学与社会发展研究中心//健康领域社会风险预测治理协同创新中心,重庆 400016Department of Occupational and Environmental Hygiene, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing 400016, China
| |
Collapse
|
61
|
Hao R, Qi Y, Hou DN, Ji YY, Zheng CY, Li CY, Yung WH, Lu B, Huang Y. BDNF val66met Polymorphism Impairs Hippocampal Long-Term Depression by Down-Regulation of 5-HT3 Receptors. Front Cell Neurosci 2017; 11:306. [PMID: 29075179 PMCID: PMC5643500 DOI: 10.3389/fncel.2017.00306] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 09/13/2017] [Indexed: 12/17/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF) is a key regulator of neuronal plasticity and cognitive functions. BDNF val66met polymorphism, a human single-nucleotide polymorphism (SNP) in the pro-domain of BDNF gene, is associated with deficits in activity-dependent BDNF secretion and hippocampus-dependent memory. However, the underlying mechanism remains unclear. Here we show that in the BDNFMet/Met mouse line mimicking the human SNP, BDNF expression in the hippocampus was decreased. There was a reduction in the total number of cells in hippocampal CA1 region, while hippocampal expression of mRNAs for NR2a, 2b, GluR1, 2 and GABAARβ3 subunits were up-regulated. Although basal glutamatergic neurotransmission was unaltered, hippocampal long-term depression (LTD) induced by low-frequency stimulation was impaired, which was partially rescued by exogenous application of BDNF. Interestingly, 5-HT3a receptors were down-regulated in the hippocampus of BDNFMet/Met mice, whereas 5-HT2c receptors were up-regulated. Moreover, impaired LTD in BDNFMet/Met mice was reversed by 5-HT3aR agonist. Thus, these observations indicate that BDNF val66met polymorphism changes hippocampal synaptic plasticity via down-regulation of 5-HT3a receptors, which may underlie cognition dysfunction of Met allele carriers.
Collapse
Affiliation(s)
- Rui Hao
- Laboratory of Neuronal Circuit & Neuroplasticity, Department of Neurology, Tongji Hospital, Shanghai, China.,Department of Physiology and Pharmacology, Tongji University School of Medicine, Shanghai, China.,Department of Physiology and Pathophysiology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yu Qi
- Laboratory of Neuronal Circuit & Neuroplasticity, Department of Neurology, Tongji Hospital, Shanghai, China.,Department of Physiology and Pharmacology, Tongji University School of Medicine, Shanghai, China.,Department of Physiology and Pathophysiology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Dong-Ni Hou
- Department of Physiology and Pathophysiology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yuan-Yuan Ji
- Neurodegeneration Discovery Performance Unit, GlaxoSmithKline (China) R&D, Shanghai, China
| | - Chun-Yan Zheng
- Neurodegeneration Discovery Performance Unit, GlaxoSmithKline (China) R&D, Shanghai, China
| | - Chu-Yu Li
- Department of Physiology and Pathophysiology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Wing-Ho Yung
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Bai Lu
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Ying Huang
- Laboratory of Neuronal Circuit & Neuroplasticity, Department of Neurology, Tongji Hospital, Shanghai, China.,Department of Physiology and Pharmacology, Tongji University School of Medicine, Shanghai, China.,Department of Physiology and Pathophysiology, Shanghai Medical College, Fudan University, Shanghai, China
| |
Collapse
|
62
|
Silva TO, Jung I, Trott A, Bica CG, Casarin JN, Fortuna PC, Ribeiro EE, de Assis FD, Figueira GC, Barbisan F, Fernanda Manica-Cattani M, Bonadiman BSR, Houenou LJ, Prado-Lima PASD, da Cruz IBM. Association between T102C 5-HT2A receptor gene polymorphism and 5-year mortality risk among Brazilian Amazon riparian elderly population. Am J Hum Biol 2017; 29. [PMID: 28488759 DOI: 10.1002/ajhb.23016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 01/16/2017] [Accepted: 04/17/2017] [Indexed: 01/30/2023] Open
Abstract
OBJECTIVE Serotonin (5-HT) is a pleiotropic molecule that exerts several functions on brain and peripheral tissues via different receptors. The gene for the 5-HT2A receptor shows some variations, including a T102C polymorphism, that have been associated with increased risk of neuropsychiatric and vascular disorders. However, the potential impact of 5-HT2A imbalance caused by genetic variations on the human lifespan has not yet been established. METHODS We performed a prospective study involving an Amazon riparian elderly free-living population in Maués City, Brazil, with a 5-year follow-up. Out of a cohort of 637 subjects selected in July, 2009, we genotyped 471 individuals, including 209 males (44.4%) and 262 females (55.6%), all averaging 72.3 ± 7.8 years of age (ranging from 60 to 100 years). RESULTS The T102C-SNP genotypic frequencies were 14.0% TT, 28.0% CC, and 58.0% CT. From 80 elderly individuals who died during the period investigated, we observed significantly (P = .005) higher numbers of TT carriers (27.3%) and CC carriers (21.2%), compared to heterozygous CT carriers (12.5%). Cox-regression analysis showed that association between the T102C-SNP and elderly survival was independent of age, sex, and other health variables. CONCLUSIONS Our findings strongly suggest that imbalance in 5-HT2A may cause significant disturbances that lead to an increased susceptibility to death for individuals who are over 60 years of age.
Collapse
Affiliation(s)
- Tális O Silva
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil
| | - Ivo Jung
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil
| | - Alexis Trott
- Programa de Pós-Graduação em Patologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Rio Grande do Sul, Brazil
| | - Cláudia G Bica
- Programa de Pós-Graduação em Patologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Rio Grande do Sul, Brazil
| | - Jeferson N Casarin
- Laboratory of Molecular Aspects Associated with Genetic Diseases, University of Western Santa Catarina, Unoesc, Brazil
| | - Paola C Fortuna
- Laboratory of Molecular Aspects Associated with Genetic Diseases, University of Western Santa Catarina, Unoesc, Brazil
| | - Euler E Ribeiro
- Universidade do Estado do Amazonas, Manaus, Amazonas, Brazil
| | - Fernanda D de Assis
- Laboratório de Biogenômica, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil
| | - Guilherme C Figueira
- Laboratório de Biogenômica, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil
| | - Fernanda Barbisan
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil
| | - Maria Fernanda Manica-Cattani
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil
| | - Beatriz S R Bonadiman
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil
| | - Lucien J Houenou
- Biotechnology Department, Forsyth Technical Community College, 2100 Silas Creek Parkway, Winston-Salem, North Carolina, 27103, USA
| | | | - Ivana B M da Cruz
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil.,Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil.,Laboratório de Biogenômica, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Rio Grande do Sul, Brazil
| |
Collapse
|
63
|
Frameworking memory and serotonergic markers. Rev Neurosci 2017; 28:455-497. [DOI: 10.1515/revneuro-2016-0079] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 01/16/2017] [Indexed: 12/29/2022]
Abstract
Abstract:The evidence for neural markers and memory is continuously being revised, and as evidence continues to accumulate, herein, we frame earlier and new evidence. Hence, in this work, the aim is to provide an appropriate conceptual framework of serotonergic markers associated with neural activity and memory. Serotonin (5-hydroxytryptamine [5-HT]) has multiple pharmacological tools, well-characterized downstream signaling in mammals’ species, and established 5-HT neural markers showing new insights about memory functions and dysfunctions, including receptors (5-HT1A/1B/1D, 5-HT2A/2B/2C, and 5-HT3-7), transporter (serotonin transporter [SERT]) and volume transmission present in brain areas involved in memory. Bidirectional influence occurs between 5-HT markers and memory/amnesia. A growing number of researchers report that memory, amnesia, or forgetting modifies neural markers. Diverse approaches support the translatability of using neural markers and cerebral functions/dysfunctions, including memory formation and amnesia. At least, 5-HT1A, 5-HT4, 5-HT6, and 5-HT7receptors and SERT seem to be useful neural markers and therapeutic targets. Hence, several mechanisms cooperate to achieve synaptic plasticity or memory, including changes in the expression of neurotransmitter receptors and transporters.
Collapse
|
64
|
Wu X, Li D, Liu J, Diao L, Ling S, Li Y, Gao J, Fan Q, Sun W, Li Q, Zhao D, Zhong G, Cao D, Liu M, Wang J, Zhao S, Liu Y, Bai G, Shi H, Xu Z, Wang J, Xue C, Jin X, Yuan X, Li H, Liu C, Sun H, Li J, Li Y, Li Y. Dammarane Sapogenins Ameliorates Neurocognitive Functional Impairment Induced by Simulated Long-Duration Spaceflight. Front Pharmacol 2017; 8:315. [PMID: 28611667 PMCID: PMC5446991 DOI: 10.3389/fphar.2017.00315] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 05/12/2017] [Indexed: 11/13/2022] Open
Abstract
Increasing evidence indicates the occurrence of cognitive impairment in astronauts under spaceflight compound conditions, but the underlying mechanisms and countermeasures need to be explored. In this study, we found that learning and memory abilities were significantly reduced in rats under a simulated long-duration spaceflight environment (SLSE), which includes microgravity, isolation confinement, noises, and altered circadian rhythms. Dammarane sapogenins (DS), alkaline hydrolyzed products of ginsenosides, can enhance cognition function by regulating brain neurotransmitter levels and inhibiting SLSE-induced neuronal injury. Bioinformatics combined with experimental verification identified that the PI3K-Akt-mTOR pathway was inhibited and the MAPK pathway was activated during SLSE-induced cognition dysfunction, whereas DS substantially ameliorated the changes in brain. These findings defined the characteristics of SLSE-induced cognitive decline and the mechanisms by which DS improves it. The results provide an effective candidate for improving cognitive function in spaceflight missions.
Collapse
Affiliation(s)
- Xiaorui Wu
- The Key Laboratory of Aerospace Medicine, Ministry of Education, The Fourth Military Medical UniversityXi'an, China.,State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Dong Li
- State Key Laboratory of Proteomics, Beijing Institute of Radiation Medicine, Beijing Proteome Research CenterBeijing, China
| | - Junlian Liu
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Lihong Diao
- State Key Laboratory of Proteomics, Beijing Institute of Radiation Medicine, Beijing Proteome Research CenterBeijing, China
| | - Shukuan Ling
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Yuheng Li
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Jianyi Gao
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Quanchun Fan
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Weijia Sun
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Qi Li
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Dingsheng Zhao
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Guohui Zhong
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Dengchao Cao
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Min Liu
- Department of Pharmacy, Beijing Shijitan Hospital, Capital Medical UniversityBeijing, China
| | - Jiaping Wang
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Shuang Zhao
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Yu Liu
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Guie Bai
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Hongzhi Shi
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Zi Xu
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Jing Wang
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Chunmei Xue
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Xiaoyan Jin
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Xinxin Yuan
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Hongxing Li
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Caizhi Liu
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Huiyuan Sun
- Xiyuan Hospital, China Academy of Chinese Medical SciencesBeijing, China
| | - Jianwei Li
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Yongzhi Li
- The Key Laboratory of Aerospace Medicine, Ministry of Education, The Fourth Military Medical UniversityXi'an, China.,State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| | - Yingxian Li
- State Key Laboratory of Space Medicine Fundamentals and Applications, China Astronaut Research and Training CenterBeijing, China
| |
Collapse
|
65
|
Safdari F, Rabbani M, Hosseini-Sharifabad A. Effect of acute and long term potassium bromide administration on spatial working memory in rat. Res Pharm Sci 2017; 12:154-159. [PMID: 28515768 PMCID: PMC5385730 DOI: 10.4103/1735-5362.202454] [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] [Indexed: 11/13/2022] Open
Abstract
Potassium bromide (KBr), an old antiepileptic agent, is illegally used in pharmaceutical or food industries to improve the product appearance. KBr has been proven to influence several pathways which are important in memory formation. Therefore, the present study aimed to evaluate the effect of KBr on spatial working memory using object recognition task (ORT). Rats received a single dose of KBr (50, 100 or 150 mg/kg), per oral, in acute treatment. KBr long term effects were also studied in animals receiving 50 mg/kg/day of KBr for 28 consecutive days. At the end of treatments, animals underwent two trials of ORT, five min each. In the first trial (T1), animals encountered with two identical objects for exploration. After 1 h, the animals were exposed to a familiar and an unfamiliar object (T2). The exploration times for discrimination (D) and recognition (R) as well as the frequency of exploration for any objects were determined. Acute administration of 150 mg/kg of KBr significantly decreased the discrimination and recognition indices (RI and DI) (P < 0.01) compared to the control. However, lower doses failed to influence the animals’ performance in the test. In addition, long term administration of KBr remarkably diminished the DI and RI and the frequency of exploration (P < 0.05). The results of this study indicate that acute doses of KBr as high as 150 mg/kg are required to hamper memory function in ORT. However, cognitive impairment occured with lower doses of KBr when the duration of treatment is extended.
Collapse
Affiliation(s)
- Faezeh Safdari
- Department of Pharmacology and Toxicology and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Mohammad Rabbani
- Department of Pharmacology and Toxicology and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Ali Hosseini-Sharifabad
- Department of Pharmacology and Toxicology and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| |
Collapse
|
66
|
Li YH, Han L, Wu KLK, Chan YS. Activation of 5-HT 7 receptors reverses NMDA-R-dependent LTD by activating PKA in medial vestibular neurons. Neuropharmacology 2017; 123:242-248. [PMID: 28483393 DOI: 10.1016/j.neuropharm.2017.05.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 04/07/2017] [Accepted: 05/04/2017] [Indexed: 11/30/2022]
Abstract
The medial vestibular nucleus (MVN) is a major output station for neurons that project to the vestibulo-spinal pathway. MVN neurons show capacity for long-term depression (LTD) during the juvenile period. We investigated LTD of MVN neurons using whole-cell patch-clamp recordings. High frequency stimulation (HFS) robustly induced LTD in 90% of type B neurons in the MVN, while only 10% of type A neurons were responsive, indicating that type B neurons are the major contributors to LTD in the MVN. The neuromodulator serotonin (5-HT) is known to modulate LTD in neural circuits of the cerebral cortex and the hippocampus. We therefore aim to determine the action of 5-HT on the LTD of type B MVN neurons and elucidate the relevant 5-HT receptor subtypes responsible for its action. Using specific agonists and antagonists of 5-HT receptors, we found that selective activation of 5-HT7 receptor in type B neurons in the MVN of juvenile (P13-16) rats completely abolished NMDA-receptor-mediated LTD in a protein kinase A (PKA)-dependent manner. Our finding that 5-HT restricts plasticity of type B MVN neurons via 5-HT7 receptors offers a mechanism whereby vestibular tuning contributes to the maturation of the vestibulo-spinal circuit and highlights the role of 5-HT in postural control.
Collapse
Affiliation(s)
- Yan-Hai Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Research Center of Rehabilitation Science and Technology, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, PR China; School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, Hong Kong, PR China
| | - Lei Han
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, Hong Kong, PR China
| | - Kenneth Lap Kei Wu
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, Hong Kong, PR China
| | - Ying-Shing Chan
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, Hong Kong, PR China; State Key Laboratory of Brain and Congnitive Sciences, The University of Hong Kong, Hong Kong, PR China.
| |
Collapse
|
67
|
Theodoridi A, Tsalafouta A, Pavlidis M. Acute Exposure to Fluoxetine Alters Aggressive Behavior of Zebrafish and Expression of Genes Involved in Serotonergic System Regulation. Front Neurosci 2017; 11:223. [PMID: 28487628 PMCID: PMC5403945 DOI: 10.3389/fnins.2017.00223] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 04/04/2017] [Indexed: 11/13/2022] Open
Abstract
Zebrafish, Danio rerio, is an emerging model organism in stress and neurobehavioral studies. In nature, the species forms shoals, yet when kept in pairs it exhibits an agonistic and anxiety-like behavior that leads to the establishment of dominant-subordinate relationships. Fluoxetine, a selective serotonin reuptake inhibitor, is used as an anxiolytic tool to alter aggressive behavior in several vertebrates and as an antidepressant drug in humans. Pairs of male zebrafish were held overnight to develop dominant-subordinate behavior, either treated or non-treated for 2 h with fluoxetine (5 mg L-1), and allowed to interact once more for 1 h. Behavior was recorded both prior and after fluoxetine administration. At the end of the experiment, trunk and brain samples were also taken for cortisol determination and mRNA expression studies, respectively. Fluoxetine treatment significantly affected zebrafish behavior and the expression levels of several genes, by decreasing offensive aggression in dominants and by eliminating freezing in the subordinates. There was no statistically significant difference in whole-trunk cortisol concentrations between dominant and subordinate fish, while fluoxetine treatment resulted in higher (P = 0.004) cortisol concentrations in both groups. There were statistically significant differences between dominant and subordinate fish in brain mRNA expression levels of genes involved in stress axis (gr, mr), neural activity (bdnf, c-fos), and the serotonergic system (htr2b, slc6a4b). The significant decrease in the offensive and defensive aggression following fluoxetine treatment was concomitant with a reversed pattern in c-fos expression levels. Overall, an acute administration of a selective serotonin reuptake inhibitor alters aggressive behavior in male zebrafish in association with changes in the neuroendocrine mediators of coping styles.
Collapse
Affiliation(s)
- Antonia Theodoridi
- Laboratory of Fish Physiology, Department of Biology, University of CreteHeraklion, Greece
| | - Aleka Tsalafouta
- Laboratory of Fish Physiology, Department of Biology, University of CreteHeraklion, Greece
| | - Michail Pavlidis
- Laboratory of Fish Physiology, Department of Biology, University of CreteHeraklion, Greece
| |
Collapse
|
68
|
Amiri Gheshlaghi S, Mohammad Jafari R, Algazo M, Rahimi N, Alshaib H, Dehpour AR. Genistein modulation of seizure: involvement of estrogen and serotonin receptors. J Nat Med 2017; 71:537-544. [PMID: 28439683 DOI: 10.1007/s11418-017-1088-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 04/17/2017] [Indexed: 11/26/2022]
Abstract
Genistein, a major source of phytoestrogen exposure for humans and animals, has been shown to mediate neuroprotection in Alzheimer's disease and status epilepticus. In the present study, we investigated the effect of genistein on pentylenetetrazole-induced seizures in ovariectomized mice and the possible involvement of estrogenic and serotonergic pathways in the probable effects of genistein. Intraperitoneal (i.p.) administration of genistein (10 mg/kg) significantly increased the seizure threshold 30 min prior to induction of seizures 14 days after ovariectomy surgery. Administration of fulvestrant (1 mg/kg, i.p.), an estrogen receptor antagonist, completely reversed the anticonvulsant effect of genistein (10 mg/kg) in ovariectomized mice. Administration of the antagonist of serotonin receptor (5-HT3), tropisetron (10 mg/kg, i.p.), eliminated the anticonvulsant effect of genistein, whereas co-administration of m-chlorophenylbiguanide (5-HT3 receptor agonist; 1 mg/kg) and a non-effective dose of genistein (5 mg/kg) increased the seizure threshold. To conclude, it seems that estrogenic/serotonergic systems might be involved in the anticonvulsant properties of genistein.
Collapse
Affiliation(s)
- Saeed Amiri Gheshlaghi
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, 13145-784, Iran
| | - Razieh Mohammad Jafari
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, 13145-784, Iran
| | - Mohammad Algazo
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, 13145-784, Iran
| | - Nastaran Rahimi
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, 13145-784, Iran
| | - Hussein Alshaib
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, 13145-784, Iran
| | - Ahmad Reza Dehpour
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran.
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, 13145-784, Iran.
| |
Collapse
|
69
|
|
70
|
Šimić G, Babić Leko M, Wray S, Harrington CR, Delalle I, Jovanov-Milošević N, Bažadona D, Buée L, de Silva R, Di Giovanni G, Wischik CM, Hof PR. Monoaminergic neuropathology in Alzheimer's disease. Prog Neurobiol 2017; 151:101-138. [PMID: 27084356 PMCID: PMC5061605 DOI: 10.1016/j.pneurobio.2016.04.001] [Citation(s) in RCA: 184] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 03/09/2016] [Accepted: 04/05/2016] [Indexed: 01/02/2023]
Abstract
None of the proposed mechanisms of Alzheimer's disease (AD) fully explains the distribution patterns of the neuropathological changes at the cellular and regional levels, and their clinical correlates. One aspect of this problem lies in the complex genetic, epigenetic, and environmental landscape of AD: early-onset AD is often familial with autosomal dominant inheritance, while the vast majority of AD cases are late-onset, with the ε4 variant of the gene encoding apolipoprotein E (APOE) known to confer a 5-20 fold increased risk with partial penetrance. Mechanisms by which genetic variants and environmental factors influence the development of AD pathological changes, especially neurofibrillary degeneration, are not yet known. Here we review current knowledge of the involvement of the monoaminergic systems in AD. The changes in the serotonergic, noradrenergic, dopaminergic, histaminergic, and melatonergic systems in AD are briefly described. We also summarize the possibilities for monoamine-based treatment in AD. Besides neuropathologic AD criteria that include the noradrenergic locus coeruleus (LC), special emphasis is given to the serotonergic dorsal raphe nucleus (DRN). Both of these brainstem nuclei are among the first to be affected by tau protein abnormalities in the course of sporadic AD, causing behavioral and cognitive symptoms of variable severity. The possibility that most of the tangle-bearing neurons of the LC and DRN may release amyloid β as well as soluble monomeric or oligomeric tau protein trans-synaptically by their diffuse projections to the cerebral cortex emphasizes their selective vulnerability and warrants further investigations of the monoaminergic systems in AD.
Collapse
Affiliation(s)
- Goran Šimić
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, Zagreb, Croatia.
| | - Mirjana Babić Leko
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Selina Wray
- Reta Lila Weston Institute and Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK
| | | | - Ivana Delalle
- Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, MA, USA
| | - Nataša Jovanov-Milošević
- Department of Neuroscience, Croatian Institute for Brain Research, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Danira Bažadona
- Department of Neurology, University Hospital Center Zagreb, Zagreb, Croatia
| | - Luc Buée
- University of Lille, Inserm, CHU-Lille, UMR-S 1172, Alzheimer & Tauopathies, Lille, France
| | - Rohan de Silva
- Reta Lila Weston Institute and Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK
| | - Giuseppe Di Giovanni
- Department of Physiology and Biochemistry, Faculty of Medicine and Surgery, University of Malta, Msida, Malta
| | - Claude M Wischik
- School of Medicine and Dentistry, University of Aberdeen, Aberdeen, UK
| | - Patrick R Hof
- Fishberg Department of Neuroscience, Ronald M. Loeb Center for Alzheimer's Disease, and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| |
Collapse
|
71
|
Postnatal development of neurotransmitter systems and their relevance to extinction of conditioned fear. Neurobiol Learn Mem 2017; 138:252-270. [DOI: 10.1016/j.nlm.2016.10.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 10/22/2016] [Accepted: 10/31/2016] [Indexed: 12/14/2022]
|
72
|
Yoshihara D, Fujiwara N, Kitanaka N, Kitanaka J, Sakiyama H, Eguchi H, Takemura M, Suzuki K. The absence of the SOD1 gene causes abnormal monoaminergic neurotransmission and motivational impairment-like behavior in mice. Free Radic Res 2016; 50:1245-1256. [PMID: 27629432 DOI: 10.1080/10715762.2016.1234048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Copper/zinc superoxide dismutase (SOD1), a primary anti-oxidative enzyme, protects cells against oxidative stress. We report herein on a comparison of behavioral and neurobiological changes between SOD1 knockout (KO) and wild-type mice, in an attempt to assess the role of SOD1 in brain functions. SOD1 KO mice exhibited impaired motivational behavior in both shuttle-box learning and three-chamber social interaction tests. High levels of dopamine transporter protein and an acceleration of serotonin turnover were also detected in the cerebrums of the SOD1 KO mice. These findings suggest that SOD1 deficiency disturbs monoaminergic neurotransmission leading to a decrease in motivational behavior.
Collapse
Affiliation(s)
- Daisaku Yoshihara
- a Department of Biochemistry , Hyogo College of Medicine , Nishinomiya , Japan
| | - Noriko Fujiwara
- a Department of Biochemistry , Hyogo College of Medicine , Nishinomiya , Japan
| | - Nobue Kitanaka
- b Department of Pharmacology , Hyogo College of Medicine , Nishinomiya , Japan
| | - Junichi Kitanaka
- b Department of Pharmacology , Hyogo College of Medicine , Nishinomiya , Japan
| | - Haruhiko Sakiyama
- a Department of Biochemistry , Hyogo College of Medicine , Nishinomiya , Japan
| | - Hironobu Eguchi
- a Department of Biochemistry , Hyogo College of Medicine , Nishinomiya , Japan
| | - Motohiko Takemura
- b Department of Pharmacology , Hyogo College of Medicine , Nishinomiya , Japan
| | - Keiichiro Suzuki
- a Department of Biochemistry , Hyogo College of Medicine , Nishinomiya , Japan
| |
Collapse
|
73
|
Lochner M, Thompson AJ. The muscarinic antagonists scopolamine and atropine are competitive antagonists at 5-HT3 receptors. Neuropharmacology 2016; 108:220-8. [PMID: 27108935 PMCID: PMC4920643 DOI: 10.1016/j.neuropharm.2016.04.027] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 03/09/2016] [Accepted: 04/20/2016] [Indexed: 11/30/2022]
Abstract
Scopolamine is a high affinity muscarinic antagonist that is used for the prevention of post-operative nausea and vomiting. 5-HT3 receptor antagonists are used for the same purpose and are structurally related to scopolamine. To examine whether 5-HT3 receptors are affected by scopolamine we examined the effects of this drug on the electrophysiological and ligand binding properties of 5-HT3A receptors expressed in Xenopus oocytes and HEK293 cells, respectively. 5-HT3 receptor-responses were reversibly inhibited by scopolamine with an IC50 of 2.09 μM. Competitive antagonism was shown by Schild plot (pA2 = 5.02) and by competition with the 5-HT3 receptor antagonists [(3)H]granisetron (Ki = 6.76 μM) and G-FL (Ki = 4.90 μM). The related molecule, atropine, similarly inhibited 5-HT evoked responses in oocytes with an IC50 of 1.74 μM, and competed with G-FL with a Ki of 7.94 μM. The reverse experiment revealed that granisetron also competitively bound to muscarinic receptors (Ki = 6.5 μM). In behavioural studies scopolamine is used to block muscarinic receptors and induce a cognitive deficit, and centrally administered concentrations can exceed the IC50 values found here. It is therefore possible that 5-HT3 receptors are also inhibited. Studies that utilise higher concentrations of scopolamine should be mindful of these potential off-target effects.
Collapse
Affiliation(s)
- Martin Lochner
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern, CH-3012, Switzerland.
| | - Andrew J Thompson
- Department of Pharmacology, Tennis Court Road, Cambridge, CB2 1PD, UK.
| |
Collapse
|
74
|
Manahan-Vaughan D, Wolf OT, Güntürkün O. Editorial: Extinction Learning from a Mechanistic and Systems Perspective. Front Behav Neurosci 2016; 10:115. [PMID: 27378869 PMCID: PMC4904282 DOI: 10.3389/fnbeh.2016.00115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 05/24/2016] [Indexed: 11/22/2022] Open
Affiliation(s)
| | - Oliver T Wolf
- Department of Cognitive Psychology, Faculty of Psychology, Institute of Cognitive Neuroscience, Ruhr University Bochum Bochum, Germany
| | - Onur Güntürkün
- Department of Biopsychology, Faculty of Psychology, Institute of Cognitive Neuroscience, Ruhr University Bochum Bochum, Germany
| |
Collapse
|
75
|
Different components of conditioned food aversion memory. Brain Res 2016; 1642:104-113. [DOI: 10.1016/j.brainres.2016.03.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 03/08/2016] [Accepted: 03/10/2016] [Indexed: 12/11/2022]
|
76
|
Kaplan SV, Limbocker RA, Gehringer RC, Divis JL, Osterhaus GL, Newby MD, Sofis MJ, Jarmolowicz DP, Newman BD, Mathews TA, Johnson MA. Impaired Brain Dopamine and Serotonin Release and Uptake in Wistar Rats Following Treatment with Carboplatin. ACS Chem Neurosci 2016; 7:689-99. [PMID: 27145395 PMCID: PMC4911621 DOI: 10.1021/acschemneuro.5b00029] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
![]()
Chemotherapy-induced
cognitive impairment, known also as “chemobrain”,
is a medical complication of cancer treatment that is characterized
by a general decline in cognition affecting visual and verbal memory,
attention, complex problem solving skills, and motor function. It
is estimated that one-third of patients who undergo chemotherapy treatment
will experience cognitive impairment. Alterations in the release and
uptake of dopamine and serotonin, central nervous system neurotransmitters
that play important roles in cognition, could potentially contribute
to impaired intellectual performance in those impacted by chemobrain.
To investigate how chemotherapy treatment affects these systems, fast-scan
cyclic voltammetry (FSCV) at carbon-fiber microelectrodes was used
to measure dopamine and serotonin release and uptake in coronal brain
slices containing the striatum and dorsal raphe nucleus, respectively.
Measurements were taken from rats treated weekly with selected doses
of carboplatin and from control rats treated with saline. Modeling
the stimulated dopamine release plots revealed an impairment of dopamine
release per stimulus pulse (80% of saline control at 5 mg/kg and 58%
at 20 mg/kg) after 4 weeks of carboplatin treatment. Moreover, Vmax, the maximum uptake rate of dopamine, was
also decreased (55% of saline control at 5 mg/kg and 57% at 20 mg/kg).
Nevertheless, overall dopamine content, measured in striatal brain
lysates by high performance liquid chromatography, and reserve pool
dopamine, measured by FSCV after pharmacological manipulation, did
not significantly change, suggesting that chemotherapy treatment selectively
impairs the dopamine release and uptake processes. Similarly, serotonin
release upon electrical stimulation was impaired (45% of saline control
at 20 mg/kg). Measurements of spatial learning discrimination were
taken throughout the treatment period and carboplatin was found to
alter cognition. These studies support the need for additional neurochemical
and behavioral analyses to identify the underlying mechanisms of chemotherapy-induced
cognitive disorders.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | - Brooke D. Newman
- Department
of Chemistry, Wayne State University, Detroit, Michigan 48202 United States
| | - Tiffany A. Mathews
- Department
of Chemistry, Wayne State University, Detroit, Michigan 48202 United States
| | | |
Collapse
|
77
|
Švob Štrac D, Pivac N, Mück-Šeler D. The serotonergic system and cognitive function. Transl Neurosci 2016; 7:35-49. [PMID: 28123820 PMCID: PMC5017596 DOI: 10.1515/tnsci-2016-0007] [Citation(s) in RCA: 161] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 04/22/2016] [Indexed: 01/23/2023] Open
Abstract
Symptoms of cognitive dysfunction like memory loss, poor concentration, impaired learning and executive functions are characteristic features of both schizophrenia and Alzheimer’s disease (AD). The neurobiological mechanisms underlying cognition in healthy subjects and neuropsychiatric patients are not completely understood. Studies have focused on serotonin (5-hydroxytryptamine, 5-HT) as one of the possible cognitionrelated biomarkers. The aim of this review is to provide a summary of the current literature on the role of the serotonergic (5-HTergic) system in cognitive function, particularly in AD and schizophrenia. The role of the 5-HTergic system in cognition is modulated by the activity and function of 5-HT receptors (5-HTR) classified into seven groups, which differ in structure, action, and localization. Many 5-HTR are located in the regions linked to various cognitive processes. Preclinical studies using animal models of learning and memory, as well as clinical in vivo (neuroimaging) and in vitro (post-mortem) studies in humans have shown that alterations in 5-HTR activity influence cognitive performance. The current evidence implies that reduced 5-HT neurotransmission negatively influences cognitive functions and that normalization of 5-HT activity may have beneficial effects, suggesting that 5-HT and 5-HTR represent important pharmacological targets for cognition enhancement and restoration of impaired cognitive performance in neuropsychiatric disorders.
Collapse
Affiliation(s)
| | - Nela Pivac
- Division of Molecular Medicine, Ruđer Bošković Institute, Zagreb, Croatia
| | - Dorotea Mück-Šeler
- Division of Molecular Medicine, Ruđer Bošković Institute, Zagreb, Croatia
| |
Collapse
|
78
|
Ramis MR, Sarubbo F, Terrasa JL, Moranta D, Aparicio S, Miralles A, Esteban S. Chronic α-Tocopherol Increases Central Monoamines Synthesis and Improves Cognitive and Motor Abilities in Old Rats. Rejuvenation Res 2016; 19:159-71. [DOI: 10.1089/rej.2015.1685] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Margarita R. Ramis
- Laboratorio de Neurofisiología, Departamento de Biología, Universitat de les Illes Balears (UIB), Palma de Mallorca, Spain
| | - Fiorella Sarubbo
- Laboratorio de Neurofisiología, Departamento de Biología, Universitat de les Illes Balears (UIB), Palma de Mallorca, Spain
| | - Juan L. Terrasa
- Laboratorio de Neurofisiología, Departamento de Biología, Universitat de les Illes Balears (UIB), Palma de Mallorca, Spain
| | - David Moranta
- Laboratorio de Neurofisiología, Departamento de Biología, Universitat de les Illes Balears (UIB), Palma de Mallorca, Spain
- Laboratorio de Infección e Inmunidad, Fundación de Investigación Sanitaria de las Islas Baleares (FISIB)-Instituto de Investigación Sanitaria de Palma (IdISPa), Centro de Investigación Biomédica en Red Enfermedades Respiratorias (CIBERES), Hospital Joan March, Mallorca, Spain
| | - Sara Aparicio
- Laboratorio de Neurofisiología, Departamento de Biología, Universitat de les Illes Balears (UIB), Palma de Mallorca, Spain
| | - Antonio Miralles
- Laboratorio de Neurofisiología, Departamento de Biología, Universitat de les Illes Balears (UIB), Palma de Mallorca, Spain
| | - Susana Esteban
- Laboratorio de Neurofisiología, Departamento de Biología, Universitat de les Illes Balears (UIB), Palma de Mallorca, Spain
| |
Collapse
|
79
|
Nikitin VP, Solntseva SV, Kozyrev SA. Dynamics of the Development of Amnesia Caused by Disruption of Memory Reconsolidation by Neurotransmitter Receptors Antagonists. Bull Exp Biol Med 2016; 160:596-600. [PMID: 27021109 DOI: 10.1007/s10517-016-3226-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Indexed: 01/29/2023]
Abstract
The dynamics of amnesia development under conditions of memory reconsolidation disruption by serotonin receptor antagonist methiothepin or NMDA glutamate receptor antagonist MK-801 was studied in snails trained in conventional food aversion. In 2 days after training, injection of methiothepin or MK-801 before reminder induced amnesia development. During repeated training in 3 days after amnesia induction, the skill was formed more rapidly than during the initial training. During repeated training in 10 days after administration of methiothepin and reminder, the dynamics of habit formation was similar to that during initial learning. At the same time, repeated training in 10 days after MK-801 administration and reminder did not result in long-term memory formation. Disruption of reconsolidation of conditioned food aversion memory by antagonists of serotonin or NMDA glutamate receptors led to the development of different types of amnesia that had similar strengthening gradient at the early stages, but differed by the possibility of memory formation during re-training at the late stage.
Collapse
Affiliation(s)
- V P Nikitin
- P. K. Anokhin Research Institute of Normal Physiology, Russian Academy of Medical Sciences, Moscow, Russia.
| | - S V Solntseva
- P. K. Anokhin Research Institute of Normal Physiology, Russian Academy of Medical Sciences, Moscow, Russia
| | - S A Kozyrev
- P. K. Anokhin Research Institute of Normal Physiology, Russian Academy of Medical Sciences, Moscow, Russia
| |
Collapse
|
80
|
Magierski R, Sobow T. Serotonergic drugs for the treatment of neuropsychiatric symptoms in dementia. Expert Rev Neurother 2016; 16:375-87. [PMID: 26886148 DOI: 10.1586/14737175.2016.1155453] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Behavioral and psychological symptoms of dementia (known also as neuropsychiatric symptoms) are essential features of Alzheimer's disease and related dementias. The near universal presence of neuropsychiatric symptoms in dementia (up to 90% of cases) has brought significant attention of clinicians and experts to the field. Non-pharmacological and pharmacological interventions are recommended for various types of neuropsychiatric symptoms. However, most pharmacological interventions for the treatment of behavioral and psychological symptoms of dementia are used off-label in many countries. Cognitive decline and neuropsychiatric symptoms can be linked to alterations in multiple neurotransmitter systems, so modification of abnormalities in specific systems may improve clinical status of patients with neuropsychiatric symptoms. Use of serotonergic compounds (novel particles acting on specific receptors and widely acting drugs) in the treatment of neuropsychiatric symptoms is reviewed.
Collapse
Affiliation(s)
- Radoslaw Magierski
- a Department of Old Age Psychiatry and Psychotic Disorders , Medical University of Lodz , Lodz , Poland
| | - Tomasz Sobow
- b Department of Medical Psychology , Medical University of Lodz , Lodz , Poland
| |
Collapse
|
81
|
Meneses A, Gasbarri B. Editorial: Serotonin and Memory. Front Pharmacol 2016; 7:8. [PMID: 26869925 PMCID: PMC4734172 DOI: 10.3389/fphar.2016.00008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 01/12/2016] [Indexed: 11/13/2022] Open
Affiliation(s)
- Alfredo Meneses
- Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional Mexico City, Mexico
| | - B Gasbarri
- Department of Applied Clinical and Biotechnologic Sciences, University of L'Aquila L'Aquila, Italy
| |
Collapse
|
82
|
Jawna-Zboińska K, Blecharz-Klin K, Joniec-Maciejak I, Wawer A, Pyrzanowska J, Piechal A, Mirowska-Guzel D, Widy-Tyszkiewicz E. Passiflora incarnata
L. Improves Spatial Memory, Reduces Stress, and Affects Neurotransmission in Rats. Phytother Res 2016; 30:781-9. [DOI: 10.1002/ptr.5578] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 12/22/2015] [Accepted: 12/29/2015] [Indexed: 02/04/2023]
Affiliation(s)
- Katarzyna Jawna-Zboińska
- Department of Experimental and Clinical Pharmacology; Medical University of Warsaw, Centre for Preclinical Research and Technology CePT; Banacha 1B 02-097 Warsaw Poland
| | - Kamilla Blecharz-Klin
- Department of Experimental and Clinical Pharmacology; Medical University of Warsaw, Centre for Preclinical Research and Technology CePT; Banacha 1B 02-097 Warsaw Poland
| | - Ilona Joniec-Maciejak
- Department of Experimental and Clinical Pharmacology; Medical University of Warsaw, Centre for Preclinical Research and Technology CePT; Banacha 1B 02-097 Warsaw Poland
| | - Adriana Wawer
- Department of Experimental and Clinical Pharmacology; Medical University of Warsaw, Centre for Preclinical Research and Technology CePT; Banacha 1B 02-097 Warsaw Poland
| | - Justyna Pyrzanowska
- Department of Experimental and Clinical Pharmacology; Medical University of Warsaw, Centre for Preclinical Research and Technology CePT; Banacha 1B 02-097 Warsaw Poland
| | - Agnieszka Piechal
- Department of Experimental and Clinical Pharmacology; Medical University of Warsaw, Centre for Preclinical Research and Technology CePT; Banacha 1B 02-097 Warsaw Poland
| | - Dagmara Mirowska-Guzel
- Department of Experimental and Clinical Pharmacology; Medical University of Warsaw, Centre for Preclinical Research and Technology CePT; Banacha 1B 02-097 Warsaw Poland
- 2nd Department of Neurology; Institute of Psychiatry and Neurology; Sobieskiego 9 02-957 Warsaw Poland
| | - Ewa Widy-Tyszkiewicz
- Department of Experimental and Clinical Pharmacology; Medical University of Warsaw, Centre for Preclinical Research and Technology CePT; Banacha 1B 02-097 Warsaw Poland
| |
Collapse
|
83
|
Morici JF, Ciccia L, Malleret G, Gingrich JA, Bekinschtein P, Weisstaub NV. Serotonin 2a Receptor and Serotonin 1a Receptor Interact Within the Medial Prefrontal Cortex During Recognition Memory in Mice. Front Pharmacol 2015; 6:298. [PMID: 26779016 PMCID: PMC4688339 DOI: 10.3389/fphar.2015.00298] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 12/03/2015] [Indexed: 12/21/2022] Open
Abstract
Episodic memory, can be defined as the memory for unique events. The serotonergic system one of the main neuromodulatory systems in the brain appears to play a role in it. The serotonin 2a receptor (5-HT2aR) one of the principal post-synaptic receptors for 5-HT in the brain, is involved in neuropsychiatric and neurological disorders associated with memory deficits. Recognition memory can be defined as the ability to recognize if a particular event or item was previously encountered and is thus considered, under certain conditions, a form of episodic memory. As human data suggest that a constitutively decrease of 5-HT2A signaling might affect episodic memory performance we decided to compare the performance of mice with disrupted 5-HT2aR signaling (htr2a−/−) with wild type (htr2a+/+) littermates in different recognition memory and working memory tasks that differed in the level of proactive interference. We found that ablation of 5-HT2aR signaling throughout development produces a deficit in tasks that cannot be solved by single item strategy suggesting that 5-HT2aR signaling is involved in interference resolution. We also found that in the absence of 5-HT2aR signaling serotonin has a deleterious effect on recognition memory retrieval through the activation of 5-HT1aR in the medial prefrontal cortex.
Collapse
Affiliation(s)
- Juan F Morici
- Systems Neuroscience Group, Laboratory of Experimental Cognition and Behavior, Institute of Physiology and Biophysics, IFIBIO "Houssay," CONICET and University of Buenos Aires Medical School Buenos Aires, Argentina
| | - Lucia Ciccia
- Systems Neuroscience Group, Laboratory of Experimental Cognition and Behavior, Institute of Physiology and Biophysics, IFIBIO "Houssay," CONICET and University of Buenos Aires Medical School Buenos Aires, Argentina
| | - Gaël Malleret
- Lyon Neuroscience Research Center, Centre National de la Recherche Scientifique UMR 5292 - Institut National de la Santé et de la Recherche Médicale U1028 - Université Claude Bernard Lyon1 Lyon, France
| | - Jay A Gingrich
- Sackler Institute for Developmental Psychobiology, Columbia University, New YorkNY, USA; New York State Psychiatric InstituteNew York, NY, USA
| | - Pedro Bekinschtein
- Laboratory of Memory Research and Molecular Cognition, Institute for Cell Biology and Neuroscience, CONICET and University of Buenos Aires Medical School Buenos Aires, Argentina
| | - Noelia V Weisstaub
- Systems Neuroscience Group, Laboratory of Experimental Cognition and Behavior, Institute of Physiology and Biophysics, IFIBIO "Houssay," CONICET and University of Buenos Aires Medical School Buenos Aires, Argentina
| |
Collapse
|
84
|
Sivamaruthi BS, Madhumita R, Balamurugan K, Rajan KE. Cronobacter sakazakii infection alters serotonin transporter and improved fear memory retention in the rat. Front Pharmacol 2015; 6:188. [PMID: 26388777 PMCID: PMC4560023 DOI: 10.3389/fphar.2015.00188] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 08/19/2015] [Indexed: 12/15/2022] Open
Abstract
It is well established that Cronobacter sakazakii infection cause septicemia, necrotizing enterocolitis and meningitis. In the present study, we tested whether the C. sakazakii infection alter the learning and memory through serotonin transporter (SERT). To investigate the possible effect on SERT, on postnatal day-15 (PND-15), wistar rat pups were administered with single dose of C. sakazakii culture (infected group; 107 CFU) or 100 μL of Luria-Bertani broth (medium control) or without any treatment (naïve control). All the individuals were subjected to passive avoidance test on PND-30 to test their fear memory. We show that single dose of C. sakazakii infection improved fear memory retention. Subsequently, we show that C. sakazakii infection induced the activation of toll-like receptor-3 and heat-shock proteins-90 (Hsp-90). On the other hand, level of serotonin (5-hydroxytryptamine) and SERT protein was down-regulated. Furthermore, we show that C. sakazakii infection up-regulate microRNA-16 (miR-16) expression. The observed results highlight that C. sakazakii infections was responsible for improved fear memory retention and may have reduced the level of SERT protein, which is possibly associated with the interaction of up-regulated Hsp-90 with SERT protein or miR-16 with SERT mRNA. Taken together, observed results suggest that C. sakazakii infection alter the fear memory possibly through SERT. Hence, this model may be effective to test the C. sakazakii infection induced changes in synaptic plasticity through SERT and effect of other pharmacological agents against pathogen induced memory disorder.
Collapse
Affiliation(s)
- Bhagavathi S Sivamaruthi
- Department of Animal Science, School of Life Sciences, Bharathidasan University , Tiruchirappalli, India
| | - Rajkumar Madhumita
- Department of Animal Science, School of Life Sciences, Bharathidasan University , Tiruchirappalli, India
| | | | - Koilmani E Rajan
- Department of Animal Science, School of Life Sciences, Bharathidasan University , Tiruchirappalli, India
| |
Collapse
|
85
|
Dastgheib M, Dehpour AR, Heidari M, Moezi L. The effects of intra-dorsal hippocampus infusion of pregnenolone sulfate on memory function and hippocampal BDNF mRNA expression of biliary cirrhosis-induced memory impairment in rats. Neuroscience 2015; 306:1-9. [PMID: 26272534 DOI: 10.1016/j.neuroscience.2015.08.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 07/22/2015] [Accepted: 08/07/2015] [Indexed: 11/24/2022]
Abstract
Learning and memory impairment is one of the most challenging complications of cirrhosis and present treatments are unsatisfactory. The exact mechanism of cirrhosis cognitive dysfunction is unknown. Pregnenolone sulfate (PREGS) is an excitatory neurosteroid that acts as a N-methyl-D-aspartate (NMDA) receptor agonist and GABAA receptor antagonist. In this study we evaluated the effect of intra CA1 infusion of PREGS on cirrhotic rats' memory function using the Y-maze test. Hippocampal brain-derived neurotrophic factor (BDNF) mRNA expression was also evaluated. Three weeks after bile duct ligation (BDL) surgery, rats were under stereotaxic surgery for insertion of two guide cannulas in the CA1 region of the hippocampus. After 1-week of recovery, PREGS was administered through CA1 cannulas in cirrhotic rats, while control or sham groups received vehicle. For evaluation of NMDA receptor role in memory-enhancing effects of PREGS, DL-2-Amino-5-phosphonopentanoic acid (AP5) which is a potent and competitive antagonist of NMDA receptor, co-administered with PREGS and for assessment of hippocampal BDNF mRNA expression, quantitative Real-time reverse transcriptase-PCR (RT-PCR) was used. Results showed that 28 days after BDL, cirrhotic animals' memory significantly decreased in comparison with control and sham groups, while PREGS infusion could restore memory impairment (P<0.05). PREGS effects on memory of cirrhotic rats were antagonized by DAP5. RT-PCR findings have shown that hippocampal relative BDNF mRNA expression was up-regulated in PREGS-treated groups in comparison with the BDL group (P<0.001). Our findings suggest that PREGS has a memory-enhancing effect in cirrhosis memory deficit in acute therapy and this effect may be through NMDA (glutamate) receptor involvement and BDNF mRNA expression.
Collapse
Affiliation(s)
- M Dastgheib
- Department of Pharmacology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - A R Dehpour
- Experimental research center, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - M Heidari
- Department of Medical Genetics, Tehran University of Medical Sciences, Tehran, Iran
| | - L Moezi
- Department of Pharmacology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran; Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
| |
Collapse
|
86
|
Abstract
Diverse neuropsychiatric disorders present dysfunctional memory and no effective treatment exits for them; likely as result of the absence of neural markers associated to memory. Neurotransmitter systems and signaling pathways have been implicated in memory and dysfunctional memory; however, their role is poorly understood. Hence, neural markers and cerebral functions and dysfunctions are revised. To our knowledge no previous systematic works have been published addressing these issues. The interactions among behavioral tasks, control groups and molecular changes and/or pharmacological effects are mentioned. Neurotransmitter receptors and signaling pathways, during normal and abnormally functioning memory with an emphasis on the behavioral aspects of memory are revised. With focus on serotonin, since as it is a well characterized neurotransmitter, with multiple pharmacological tools, and well characterized downstream signaling in mammals' species. 5-HT1A, 5-HT4, 5-HT5, 5-HT6, and 5-HT7 receptors as well as SERT (serotonin transporter) seem to be useful neural markers and/or therapeutic targets. Certainly, if the mentioned evidence is replicated, then the translatability from preclinical and clinical studies to neural changes might be confirmed. Hypothesis and theories might provide appropriate limits and perspectives of evidence.
Collapse
Affiliation(s)
- Alfredo Meneses
- Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional Mexico City, Mexico
| |
Collapse
|
87
|
Sambeth A, Riedel WJ, Klinkenberg I, Kähkönen S, Blokland A. Biperiden selectively induces memory impairment in healthy volunteers: no interaction with citalopram. Psychopharmacology (Berl) 2015; 232:1887-97. [PMID: 25466702 DOI: 10.1007/s00213-014-3822-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 11/14/2014] [Indexed: 12/24/2022]
Abstract
RATIONALE Traditionally, the non-selective muscarinic antagonist scopolamine has been used to induce episodic memory impairments as found in Alzheimer's disease (AD). However, it also impairs attention and induces drowsiness. Muscarinic antagonists more selective for the M1 receptor might, therefore, be preferred. OBJECTIVES We examined the effects of the M1 antagonist biperiden on cognitive functions in order to test the specificity of this drug on memory performance. Additionally, we assessed whether the selective serotonin re-uptake inhibitor citalopram can reverse a possible biperiden-induced impairment. METHODS The study was conducted according to a double-blind, placebo-controlled, four-way cross-over design. Sixteen volunteers received biperiden (2 mg), citalopram (20 mg), a combination of the two, or a placebo in counterbalanced order with a washout of at least 4 days. Cognitive tests (verbal memory, continuous recognition memory, spatial memory, choice reaction) were performed 4 and 1 h after treatment with citalopram and biperiden, respectively. RESULTS Biperiden impaired memory performance in the verbal learning task, the continuous recognition memory test, and the spatial memory task. Effects on attention and side effects, as measured using the choice reaction time test and questionnaires respectively, could be neglected. Citalopram did not affect any of the memory or attention measures taken. Most importantly, citalopram was also unable to reverse the biperiden-induced memory impairments. CONCLUSIONS Our results, thus, show that the M1 antagonist biperiden may serve as a translational model to induce episodic memory deficits as seen in AD. However, the interactive influence of acetylcholine and serotonin on memory could not be confirmed.
Collapse
Affiliation(s)
- Anke Sambeth
- Faculty of Psychology and Neuroscience, Department of Neuropsychology and Psychopharmacology, Maastricht University, Universiteitssingel 40, 6229 ER, Maastricht, The Netherlands,
| | | | | | | | | |
Collapse
|
88
|
Tsolaki A, Kosmidou V, Hadjileontiadis L, Kompatsiaris I(Y, Tsolaki M. Brain source localization of MMN, P300 and N400: Aging and gender differences. Brain Res 2015; 1603:32-49. [DOI: 10.1016/j.brainres.2014.10.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 09/28/2014] [Accepted: 10/01/2014] [Indexed: 12/29/2022]
|
89
|
Escitalopram Ameliorates Forskolin-Induced Tau Hyperphosphorylation in HEK239/tau441 Cells. J Mol Neurosci 2015; 56:500-8. [PMID: 25687330 DOI: 10.1007/s12031-015-0519-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 02/04/2015] [Indexed: 12/17/2022]
Abstract
To investigate the effect of escitalopram (a widely used and highly efficacious antidepressant from the SSRI class) on tau hyperphosphorylation, HEK293/tau441 cells were pretreated with 4 μM of forskolin for 2 h. Then we treated the cells with different doses of escitalopram (0, 5, 10, 20, 40, 80 μM) for 22 h. We measured the phosphorylation level of tau by Western blotting. It was shown that escitalopram could protect tau from hyperphosphorylation induced by pharmacological activation of protein kinase A (PKA) at a dose of 20, 40, and 80 μM in vitro. Interestingly, the same dose of escitalopram could also increase the level of serine-9-phosphorylated GSK-3β (inactive form) and the phosphorylation level of Akt at Ser473 (active form) with no significant change in the level of total GSK-3β and Akt. Unexpectedly, 5-hydroxytryptamine 1A receptor (5-HT1A) agonist 8-OH-DPAT did not decrease forskolin-induced tau hyperphosphorylation. Our results suggest that escitalopram can ameliorate forskolin-induced tau hyperphosphorylation, which is not through the typical 5-HT1A pathway, and Akt/GSK-3β signaling pathway is involved. These findings may support an effective role of antidepressants in the prevention of dementia associated with depression in patients.
Collapse
|
90
|
Meneses A, Perez-Garcia G, Liy-Salmeron G, Ponce-López T, Lacivita E, Leopoldo M. 5-HT7 receptor activation: procognitive and antiamnesic effects. Psychopharmacology (Berl) 2015; 232:595-603. [PMID: 25074446 DOI: 10.1007/s00213-014-3693-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 07/16/2014] [Indexed: 12/31/2022]
Abstract
RATIONALE The serotonin (5-hydroxytryptamine (5-HT)) 5-HT7 receptor is localized in brain areas mediating memory; however, the role of this receptor on memory remains little explored. OBJECTIVE First, demonstrating the associative nature of Pavlovian/instrumental autoshaping (P/I-A) task, rats were exposed (three sessions) to CS-US (Pavlovian autoshaping), truly random control, free operant, and presentations of US or CS, and they were compared with rats trained-tested for one session to the P/I-A procedure. Also, effects of the 5-HT7 receptor agonist LP-211 administered intraperitoneally after training was determined on short- (1.5 h) and long-term memory 24 and 48 h) and on scopolamine-induced memory impairment and cAMP production. METHODS Autoshaping and its behavioral controls were studied. Other animals were subjected to an autoshaping training session and immediately afterwards were given (intraperitoneal) vehicle or LP-211 (0.1-10 mg/kg) and/or scopolamine (0.2 mg/kg) and tested for short-term memory (STM) and long-term memory (LTM); their brains were extracted for the cAMP ELISA immunoassay. RESULTS P/I-A group produced the higher %CR. LP-211 did not affect STM; nonetheless, at 0.5 and 1.0 mg/kg, it improved LTM. The 5-HT7 receptor antagonist SB-269970 (SB; 10.0 mg/kg) alone had no effect; nevertheless, the LP-211 (1.0 mg/kg) LTM facilitation was reversed by SB. The scopolamine (0.2 mg/kg) induced-decrement in CR was accompanied by significant increased cAMP production. The scopolamine-induced decrement in CR and increments in cAMP were significantly attenuated by LP-211. CONCLUSIONS Autoshaping is a reliable associative learning task whose consolidation is facilitated by the 5-HT7 receptor agonist LP-211.
Collapse
Affiliation(s)
- A Meneses
- Depto. de Farmacobiología, CINVESTAV-IPN, México City, México,
| | | | | | | | | | | |
Collapse
|
91
|
Abstract
The ability to focus one's attention on important environmental stimuli while ignoring irrelevant stimuli is fundamental to human cognition and intellectual function. Attention is inextricably linked to perception, learning and memory, and executive function; however, it is often impaired in a variety of neuropsychiatric disorders, including Alzheimer's disease, schizophrenia, depression, and attention deficit hyperactivity disorder (ADHD). Accordingly, attention is considered as an important therapeutic target in these disorders. The purpose of this chapter is to provide an overview of the most common behavioral paradigms of attention that have been used in animals (particularly rodents) and to review the literature where these tasks have been employed to elucidate neurobiological substrates of attention as well as to evaluate novel pharmacological agents for their potential as treatments for disorders of attention. These paradigms include two tasks of sustained attention that were developed as rodent analogues of the human Continuous Performance Task (CPT), the Five-Choice Serial Reaction Time Task (5-CSRTT) and the more recently introduced Five-Choice Continuous Performance Task (5C-CPT), and the Signal Detection Task (SDT) which was designed to emphasize temporal components of attention.
Collapse
Affiliation(s)
- Patrick M Callahan
- Department of Pharmacology and Toxicology, CB-3545, Georgia Regents University, 1120 Fifteenth Street, Augusta, GA, 30912-2450, USA
| | | |
Collapse
|
92
|
García-Fuster MJ, García-Sevilla JA. Monoamine receptor agonists, acting preferentially at presynaptic autoreceptors and heteroreceptors, downregulate the cell fate adaptor FADD in rat brain cortex. Neuropharmacology 2014; 89:204-14. [PMID: 25286119 DOI: 10.1016/j.neuropharm.2014.09.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 08/26/2014] [Accepted: 09/15/2014] [Indexed: 11/13/2022]
Abstract
FADD is a crucial adaptor of death receptors that can engage apoptosis or survival actions (e.g. neuroplasticity) through its phosphorylated form (p-FADD). Although FADD was shown to participate in receptor mechanisms related to drugs of abuse, little is known on its role in the signaling of classic neurotransmitters (dopamine, noradrenaline, and serotonin) in brain. This study assessed the modulation of FADD (and p-FADD/FADD ratio, as an index of neuroplasticity) and FLIP-L (a neuroprotective FADD interacting partner), as well as the role of MEK-ERK signaling, after activation of monoamine auto/heteroreceptors by selective agonists in rat cortex. Acute depletion of monoamines with reserpine, but not with AMPT or PCPA, reduced FADD (28%) and increased p-FADD/FADD ratio (1.34-fold). Activation of presynaptic α2A-adrenoceptors (UK-14304 and clonidine), 5-HT1A receptors (8-OH-DPAT), and D2 dopamine receptor (bromocriptine) dose-dependently decreased FADD (up to 54%) and increased p-FADD (up to 29%) and p-FADD/FADD ratios (up to 2.93-fold), through specific receptor mechanisms. Activation of rat 5-HT1B autoreceptor in axon terminals by CP-94253 did not modulate FADD forms. Activation of postsynaptic D1 dopamine receptor by SKF-81297 also reduced FADD (25%) and increased p-FADD (32%). Disruption of MEK-ERK activation with SL327 did not modify clonidine (α2A-adrenoceptor)-induced FADD inhibition, indicating that agonist effect was not dependent on ERK signaling. The various monoamine receptor agonists and antagonists did not alter FLIP-L content, or the activation of executioner caspase-3 and PARP-1 cleavage, indicating that the agonists attenuated apoptotic signals and promoted neuroplasticity through FADD regulation. These novel results indicate that inhibition of pro-apoptotic FADD adaptor could function as a common signaling step in the initial activation of monoamine receptors in the brain.
Collapse
Affiliation(s)
- M Julia García-Fuster
- Neurobiology of Drug Abuse Group, IUNICS/IdISPa, University of the Balearic Islands, Spain; Redes Temáticas de Investigación Cooperativa en Salud-Red de Trastornos Adictivos (RETICS-RTA), Palma de Mallorca, Spain.
| | - Jesús A García-Sevilla
- Laboratory of Neuropharmacology, IUNICS/IdISPa, University of the Balearic Islands, Spain; Redes Temáticas de Investigación Cooperativa en Salud-Red de Trastornos Adictivos (RETICS-RTA), Palma de Mallorca, Spain
| |
Collapse
|