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Berardelli I, Amerio A, Bartoli F, Cuomo A, Deste G, Orsolini L, Sampogna G, Pompili M. Rethinking the role of trazodone in the different depressive dimensions. Expert Rev Neurother 2024; 24:619-632. [PMID: 38881379 DOI: 10.1080/14737175.2024.2363843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Accepted: 05/31/2024] [Indexed: 06/18/2024]
Abstract
INTRODUCTION The efficacy of trazodone for several psychopathologic dimensions of depression has been shown in the literature. Trazodone has been widely used in some clinical contexts (e.g. for insomnia and depression in the elderly). However, the role of trazodone in several aspects of depression is not well known. AREA COVERED Eight experts from academic and medical centers across Italy met to identify the difficulties and barriers faced in daily clinical practice in the assessment and management of major depressive disorder and how the use of trazodone could address some unmet needs. The objective of the expert meetings and the present document was to increase knowledge of particular areas of treatment with trazodone. EXPERT OPINION Evidence of the role of trazodone in patients affected by major depressive disorder with anxiety symptoms, insomnia, agitation, cognitive deficits, alcohol use disorders, physical comorbidities, and suicide risk has been identified, showing the effectiveness of trazodone in different presentations of major depressive disorder. The main characteristics of patients with depression for whom trazodone seems to be most effective have been identified, providing clinicians with information on possible uses of this drug in such population of patients.
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Affiliation(s)
- Isabella Berardelli
- Department of Neurosciences, Mental Health and Sensory Organs, Suicide Prevention Centre, Sant'Andrea Hospital, Sapienza University of Rome, Rome, Italy
| | - Andrea Amerio
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), Section of Psychiatry, University of Genoa, Genoa, Italy
- IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Francesco Bartoli
- School of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy
| | - Alessandro Cuomo
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Giacomo Deste
- Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
- Department of Mental Health and Addiction Services, ASST Valcamonica, Esine, Italy
| | - Laura Orsolini
- Unit of Clinical Psychiatry, Department of Neurosciences/DIMSC, Polytechnic University of Marche, Ancona, Italy
| | - Gaia Sampogna
- Department of Psychiatry, University of Campania 'L. Vanvitelli', Naples, Italy
| | - Maurizio Pompili
- Department of Neurosciences, Mental Health and Sensory Organs, Suicide Prevention Centre, Sant'Andrea Hospital, Sapienza University of Rome, Rome, Italy
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Lee JE, Ju YJ, Chun KH, Lee SY. The Frequency of Sleep Medication Use and the Risk of Subjective Cognitive Decline (SCD) or SCD With Functional Difficulties in Elderly Individuals Without Dementia. J Gerontol A Biol Sci Med Sci 2019; 75:1693-1698. [DOI: 10.1093/gerona/glz269] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Indexed: 01/25/2023] Open
Abstract
Abstract
Background
The present study investigated whether the frequency of sleep medication use affects subjective cognitive decline (SCD) or SCD with functional difficulties in elderly individuals.
Methods
The 2018 Korea Community Health Survey data, which consists of national representative and community-based data, was used in this study. A total of 57,050 individuals aged 65 years or older were included in this study. SCD was measured using the Behavioral Risk Factor Surveillance System. A logistic regression analysis was used to analyze the data.
Results
In total, 16,966 (29.7%) participants had SCD and 3,487 (6.1%) had SCD with functional difficulties. The elderly individuals who took sleep medication more than once a week had higher risks of both SCD and SCD with functional difficulties than those who did not take any sleep medication in a month (SCD: odds ratio [OR] = 1.329, 95% confidence interval [CI] = 1.194–1.480; SCD with functional difficulties: OR = 1.752, 95% CI = 1.491–2.058).
Conclusions
Frequent sleep medication use was associated with both SCD and SCD with functional difficulties. This study suggests that early detection of cognitive impairment and efforts to reduce the frequent use of sleeping pills in patients with insomnia might be helpful to reduce the burden of SCD and SCD with functional difficulties in the elderly population.
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Affiliation(s)
- Joo Eun Lee
- Department of Preventive Medicine and Public Health, Ajou University School of Medicine, Yeongtong-gu, Korea
- Institute of Health Services Research, Yonsei University College of Medicine, Seoul, Korea
| | - Yeong Jun Ju
- Department of Preventive Medicine and Public Health, Ajou University School of Medicine, Yeongtong-gu, Korea
- Institute of Health Services Research, Yonsei University College of Medicine, Seoul, Korea
| | - Ki Hong Chun
- Department of Preventive Medicine and Public Health, Ajou University School of Medicine, Yeongtong-gu, Korea
| | - Soon Young Lee
- Department of Preventive Medicine and Public Health, Ajou University School of Medicine, Yeongtong-gu, Korea
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Behavioral consequences of co-administration of MTEP and the COX-2 inhibitor NS398 in mice. Part 1. Behav Brain Res 2019; 370:111961. [DOI: 10.1016/j.bbr.2019.111961] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 05/16/2019] [Accepted: 05/17/2019] [Indexed: 01/01/2023]
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Nucleocytoplasmic export of HDAC5 and SIRT2 downregulation: two epigenetic mechanisms by which antidepressants enhance synaptic plasticity markers. Psychopharmacology (Berl) 2018; 235:2831-2846. [PMID: 30091005 DOI: 10.1007/s00213-018-4975-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Accepted: 07/17/2018] [Indexed: 10/28/2022]
Abstract
RATIONALE Antidepressant action has been linked to increased synaptic plasticity in which epigenetic mechanisms such as histone posttranslational acetylation could be involved. Interestingly, the histone deacetylases HDAC5 and SIRT2 are oppositely regulated by stress and antidepressants in mice prefrontal cortex (PFC). Besides, the neuroblastoma SH-SY5Y line is an in vitro neuronal model reliable to study drug effects with clear advantages over animals. OBJECTIVES We aimed to characterize in vitro the role of HDAC5 and SIRT2 in antidepressant regulation of neuroplasticity. METHODS SH-SY5Y cultures were incubated with imipramine, fluoxetine, and reboxetine (10 μM, 2 and 24 h) as well as the selective HDAC5 (MC3822, 5 μM, 24 h) or SIRT2 (33i, 5 μM, 24 h) inhibitors. The regulation of the brain-derived neurotrophic factor (BDNF), the vesicular glutamate transporter 1 (VGLUT1), the acetylated histones 3 (AcH3) and 4 (AcH4), HDAC5, and SIRT2 was studied. Comparatively, the long-term effects of these antidepressants (21 days, i.p.) in the mice (C57BL6, 8 weeks) PFC were studied. RESULTS Antidepressants increased both in vitro and in vivo expression of BDNF, VGLUT1, AcH3, and AcH4. Moreover, imipramine and reboxetine increased the phosphorylated form of HDAC5 (P-HDAC5), mediating its cytoplasmic export. Further, SIRT2 was downregulated by all antidepressants. Finally, specific inhibition of HDAC5 and SIRT2 increased neuroplasticity markers. CONCLUSIONS This study supports the validity of the SH-SY5Y model for studying epigenetic changes linked to synaptic plasticity induced by antidepressants as well as the effect of selective HDAC inhibitors. Particularly, nucleocytoplasmic export of HDAC5 and SIRT2 downregulation mediated by antidepressants could enhance synaptic plasticity markers leading to antidepressant action.
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Menezes CEDS, McIntyre RS, Chaves Filho AJM, Vasconcelos SMM, de Sousa FCF, Quevedo J, Hyphantis TN, Carvalho AF, Macêdo D. The effect of paroxetine, venlafaxine and bupropion administration alone and combined on spatial and aversive memory performance in rats. Pharmacol Rep 2018; 70:1173-1179. [PMID: 30321807 DOI: 10.1016/j.pharep.2018.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 06/07/2018] [Accepted: 07/20/2018] [Indexed: 01/03/2023]
Abstract
BACKGROUND The use of antidepressants in combination is common practice following non-response to single antidepressant agents. Nevertheless, the scientific literature lacks preclinical studies regarding the combined administration of antidepressants across multiple behavioral measures including, but not limited to, cognition. Hence, we aimed to determine the effects of paroxetine (PAR), venlafaxine (VEN) and bupropion (BUP) alone or combined (PAR+BUP or VEN+BUP) on spatial and affective memory tasks to advance the knowledge about the combined use of antidepressants in cognition. METHODS Adult rats received daily injections (15 days) of PAR (20mg/kg, ip), VEN (20mg/kg, ip), BUP (20mg/kg, ip) alone or combined and were submitted to behavioral measures of spatial memory (radial-arm maze - RAM), aversive memory (passive avoidance - PA), open field (OF) and forced swimming (FST) tests. RESULTS In the RAM, VEN or VEN+BUP impaired learning, while short-term memory (STM) was impaired by PAR, BUP and their combination. VEN+BUP improved STM as compared to BUP. PAR impaired long-term memory (LTM). VEN or BUP alone impaired STM and long-term fear memory, whilst PAR+BUP or VEN+BUP did not induce significant alterations. CONCLUSIONS The effects of VEN, PAR or BUP alone and in combination on measures of memory are variable and vary as a function of the pharmacodynamics profile of each drug as well as the specific memory paradigm.
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Affiliation(s)
| | - Roger S McIntyre
- Department of Psychiatry, Department of Pharmacology and Toxicology, Mood Disorders Psychopharmacology Unit, University of Toronto, Toronto, ON, Canada
| | | | | | | | - João Quevedo
- Laboratory of Neurosciences, University of Southern Santa Catarina, Criciúma, SC, Brazil; Translational Psychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA; Center of Excellence on Mood Disorders, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA; Neuroscience Graduate Program, The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, USA; Laboratory of Neurosciences, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | | | - André F Carvalho
- Department of Psychiatry, Department of Pharmacology and Toxicology, Mood Disorders Psychopharmacology Unit, University of Toronto, Toronto, ON, Canada; Centre for Addiction & Mental Health (CAMH), University of Toronto, Toronto, ON, Canada
| | - Danielle Macêdo
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, CE, Brazil; National Institute for Translational Medicine (INCT-TM, CNPq), Ribeirão Preto, Brazil.
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Teixeira CM, Rosen ZB, Suri D, Sun Q, Hersh M, Sargin D, Dincheva I, Morgan AA, Spivack S, Krok AC, Hirschfeld-Stoler T, Lambe EK, Siegelbaum SA, Ansorge MS. Hippocampal 5-HT Input Regulates Memory Formation and Schaffer Collateral Excitation. Neuron 2018; 98:992-1004.e4. [PMID: 29754752 DOI: 10.1016/j.neuron.2018.04.030] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 03/23/2018] [Accepted: 04/20/2018] [Indexed: 01/22/2023]
Abstract
The efficacy and duration of memory storage is regulated by neuromodulatory transmitter actions. While the modulatory transmitter serotonin (5-HT) plays an important role in implicit forms of memory in the invertebrate Aplysia, its function in explicit memory mediated by the mammalian hippocampus is less clear. Specifically, the consequences elicited by the spatio-temporal gradient of endogenous 5-HT release are not known. Here we applied optogenetic techniques in mice to gain insight into this fundamental biological process. We find that activation of serotonergic terminals in the hippocampal CA1 region both potentiates excitatory transmission at CA3-to-CA1 synapses and enhances spatial memory. Conversely, optogenetic silencing of CA1 5-HT terminals inhibits spatial memory. We furthermore find that synaptic potentiation is mediated by 5-HT4 receptors and that systemic modulation of 5-HT4 receptor function can bidirectionally impact memory formation. Collectively, these data reveal powerful modulatory influence of serotonergic synaptic input on hippocampal function and memory formation.
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Affiliation(s)
- Catia M Teixeira
- Department of Psychiatry, Columbia University, New York, NY 10032, USA; New York State Psychiatric Institute, New York, NY 10032, USA; Emotional Brain Institute, Nathan Kline Institute, Orangeburg, NY 10962, USA
| | - Zev B Rosen
- Department of Neuroscience, Kavli Institute, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10027, USA
| | - Deepika Suri
- Department of Psychiatry, Columbia University, New York, NY 10032, USA
| | - Qian Sun
- Department of Neuroscience, Kavli Institute, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10027, USA
| | - Marc Hersh
- Department of Psychiatry, Columbia University, New York, NY 10032, USA
| | - Derya Sargin
- Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Iva Dincheva
- Department of Psychiatry, Columbia University, New York, NY 10032, USA; New York State Psychiatric Institute, New York, NY 10032, USA
| | - Ashlea A Morgan
- Department of Psychiatry, Columbia University, New York, NY 10032, USA
| | - Stephen Spivack
- Department of Psychiatry, Columbia University, New York, NY 10032, USA
| | - Anne C Krok
- Department of Psychiatry, Columbia University, New York, NY 10032, USA; New York State Psychiatric Institute, New York, NY 10032, USA
| | | | - Evelyn K Lambe
- Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada; Department of Obstetrics and Gynaecology, University of Toronto, Toronto, ON M5S 1A8, Canada; Department of Psychiatry, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Steven A Siegelbaum
- Department of Neuroscience, Kavli Institute, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10027, USA; Department of Pharmacology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | - Mark S Ansorge
- Department of Psychiatry, Columbia University, New York, NY 10032, USA; New York State Psychiatric Institute, New York, NY 10032, USA.
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da Conceição RR, Laureano-Melo R, Oliveira KC, de Carvalho Melo MC, Kasamatsu TS, de Barros Maciel RM, de Souza JS, Giannocco G. Antidepressant behavior in thyroidectomized Wistar rats is induced by hippocampal hypothyroidism. Physiol Behav 2016; 157:158-64. [PMID: 26861177 DOI: 10.1016/j.physbeh.2016.02.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/18/2015] [Accepted: 02/03/2016] [Indexed: 01/10/2023]
Abstract
Thyroidectomy is a surgical procedure indicated in cases of several maligned or benign thyroid diseases, thus, the aim of our study was to verify how the hypothyroidism induced by thyroidectomy influences behavioral parameters and its relation to thyroid hormones metabolism and neurogenesis at hippocampus. For this purpose, Adult male Wistar rats underwent to thyroidectomy to induce hypothyroidism. Behavioral tests, the thyroid profile and hippocampal gene expression were evaluated in control and in thyroidectomized animals. It was observed that thyroidectomized group had a significant increasing in serum thyroid-stimulating hormone (TSH) and a decreasing in thyroxine (T4) levels as well as in triiodothyronine (T3) serum level. It was also observed reduction of the monocarboxylate transporter 8 (Mct8), thyroid hormone receptor alfa (Trα1), deiodinase type 2 (Dio2), ectonucleotide pyrophosphatase/phosphodiesterase 2 (Enpp2) and brain-derived neurotrophic factor (Bdnf) mRNA expression in hippocampus of thyroidectomized animals. In the forced swimming test, it was verified that thyroidectomy promotes a decrease in time of immobility and climbing when compared with the control group. In summary, we demonstrated that antidepressant behavior in thyroidectomized Wistar rats is induced by hippocampal hypothyroidism. This effect could be associated to an impaired neuronal activity in acute stress response as it is observed in forced swimming paradigm.
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Affiliation(s)
- Rodrigo Rodrigues da Conceição
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Roberto Laureano-Melo
- Departamento de Tecnologia de Alimentos, Instituto de Tecnologia, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
| | - Kelen Carneiro Oliveira
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Maria Clara de Carvalho Melo
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Tereza Sayoko Kasamatsu
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Rui Monteiro de Barros Maciel
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Janaina Sena de Souza
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Gisele Giannocco
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil; Departamento de Ciências Biológicas, Universidade Federal de São Paulo, Diadema, SP, Brazil.
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Spiegel DR, Mccroskey AL, Deyerle BA. A Case of Transient Global Amnesia: A Review and How It May Shed Further Insight into the Neurobiology of Delusions. INNOVATIONS IN CLINICAL NEUROSCIENCE 2016; 13:32-41. [PMID: 27354927 PMCID: PMC4911939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Transient global amnesia is a clinical syndrome characterized by the sudden onset of anterograde amnesia, accompanied by repetitive questioning, sometimes with a retrograde component, lasting up to 24 hours, without compromise of other neurologic function. Neuroimaging after an acutetransient global amnesia event often shows transient perturbation of specific hippocampal circuits that are involved in memory processing. Critical clinical distinctions, such as between transient global amnesia and other forms of transient amnesic episodes, as well as important clues to the underlying pathophysiologies are herein reviewed. Finally, we discuss the role of hippocampal insufficiency in the neurobiology of delusions.
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Affiliation(s)
- David R Spiegel
- All with the Department of Psychiatry and Behavioral Sciences, Eastern Virginia Medical School, Norfolk, Virginia
| | - Aidan L Mccroskey
- All with the Department of Psychiatry and Behavioral Sciences, Eastern Virginia Medical School, Norfolk, Virginia
| | - Branden A Deyerle
- All with the Department of Psychiatry and Behavioral Sciences, Eastern Virginia Medical School, Norfolk, Virginia
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The effects of prolonged administration of norepinephrine reuptake inhibitors on long-term potentiation in dentate gyrus, and on tests of spatial and object recognition memory in rats. Neurobiol Learn Mem 2016; 128:92-102. [PMID: 26774023 DOI: 10.1016/j.nlm.2015.12.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 12/16/2015] [Accepted: 12/30/2015] [Indexed: 11/23/2022]
Abstract
Phasic norepinephrine (NE) release events are involved in arousal, novelty detection and in plasticity processes underlying learning and memory in mammalian systems. Although the effects of phasic NE release events on plasticity and memory are prevalently documented, it is less understood what effects chronic NE reuptake inhibition and sustained increases in noradrenergic tone, might have on plasticity and cognitive processes in rodent models of learning and memory. This study investigates the effects of chronic NE reuptake inhibition on hippocampal plasticity and memory in rats. Rats were administered NE reuptake inhibitors (NRIs) desipramine (DMI; 0, 3, or 7.5mg/kg/day) or nortriptyline (NTP; 0, 10 or 20mg/kg/day) in drinking water. Long-term potentiation (LTP; 200 Hz) of the perforant path-dentate gyrus evoked potential was examined in urethane anesthetized rats after 30-32 days of DMI treatment. Short- (4-h) and long-term (24-h) spatial memory was tested in separate rats administered 0 or 7.5mg/kg/day DMI (25-30 days) using a two-trial spatial memory test. Additionally, the effects of chronically administered DMI and NTP were tested in rats using a two-trial, Object Recognition Test (ORT) at 2- and 24-h after 45 and 60 days of drug administration. Rats administered 3 or 7.5mg/kg/day DMI had attenuated LTP of the EPSP slope but not the population spike at the perforant path-dentate gyrus synapse. Short- and long-term memory for objects is differentially disrupted in rats after prolonged administration of DMI and NTP. Rats that were administered 7.5mg/kg/day DMI showed decreased memory for a two-trial spatial task when tested at 4-h. In the novel ORT, rats receiving 0 or 7.5mg/kg/day DMI showed a preference for the arm containing a Novel object when tested at both 2- and 24-h demonstrating both short- and long-term memory retention of the Familiar object. Rats that received either dose of NTP or 3mg/kg/day DMI showed impaired memory at 2-h, however this impairment was largely reversed at 24-h. Animals in the high-dose NTP (20mg/kg/day) group were impaired at both short- and long-term intervals. Activity levels, used as an index of location memory during the ORT, demonstrated that rats receiving DMI were again impaired at retaining memory for location. DMI dose-dependently disrupts LTP in the dentate gyrus of anesthetized rats and also disrupts memory for tests of spatial memory when administered for long periods.
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Fabbri C, Serretti A. Pharmacogenetics of major depressive disorder: top genes and pathways toward clinical applications. Curr Psychiatry Rep 2015; 17:50. [PMID: 25980509 DOI: 10.1007/s11920-015-0594-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The pharmacogenetics of antidepressants has been not only a challenging but also frustrating research field since its birth in the 1990s. Indeed, great expectations followed the first evidence of familiar aggregation of antidepressant response. Despite the progress from candidate gene studies to genome-wide association studies (GWAS), results fell out the expectations and they were often inconsistent. Anyway, the cumulative evidence supports the involvement of some genes and molecular pathways in antidepressant efficacy. The best single genes are SLC6A4, HTR2A, BDNF, GNB3, FKBP5, ABCB1, and cytochrome P450 genes (CYP2D6 and CYP2C19). Molecular pathways involved in inflammation and neuroplasticity show the greatest support. The first studies evaluating benefits of genotype-guided antidepressant treatments provided encouraging results and confirmed the relevance of SLC6A4, HTR2A, ABCB1, and cytochrome P450 genes. Further progress in genotyping and data analysis would allow to move forward and complete the understanding of antidepressant pharmacogenetics and its translation into clinical applications.
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Affiliation(s)
- Chiara Fabbri
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Viale Carlo Pepoli 5, 40123, Bologna, Italy,
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Gocmez SS, Yazir Y, Sahin D, Karadenizli S, Utkan T. The effect of a selective neuronal nitric oxide synthase inhibitor 3-bromo 7-nitroindazole on spatial learning and memory in rats. Pharmacol Biochem Behav 2015; 131:19-25. [PMID: 25636602 DOI: 10.1016/j.pbb.2015.01.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2013] [Revised: 01/15/2015] [Accepted: 01/20/2015] [Indexed: 11/25/2022]
Abstract
Since the discovery of nitric oxide (NO) as a neuronal messenger, its way to modulate learning and memory functions is subject of intense research. NO is an intercellular messenger in the central nervous system and is formed on demand through the conversion of L-arginine to L-citrulline via the enzyme nitric oxide synthase (NOS). Neuronal form of nitric oxide synthase may play an important role in a wide range of physiological and pathological conditions. Therefore the aim of this study was to investigate the effects of chronic 3-bromo 7-nitroindazole (3-Br 7-NI), specific neuronal nitric oxide synthase (nNOS) inhibitor, administration on spatial learning and memory performance in rats using the Morris water maze (MWM) paradigm. Male rats received either 3-Br 7-NI (20mg/kg/day) or saline via intraperitoneal injection for 5days. Daily administration of the specific neuronal nitric oxide synthase (nNOS) inhibitor, 3-Br 7-NI impaired the acquisition of the MWM task. 3-Br 7-NI also impaired the probe trial. The MWM training was associated with a significant increase in the brain-derived neurotrophic factor (BDNF) mRNA expression in the hippocampus. BDNF mRNA expression in the hippocampus did not change after 3-Br 7-NI treatment. L-arginine significantly reversed behavioural parameters, and the effect of 3-Br 7-NI was found to be NO-dependent. There were no differences in locomotor activity and blood pressure in 3-Br 7-NI treated rats. Our results may suggest that nNOS plays a key role in spatial memory formation in rats.
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Affiliation(s)
- Semil Selcen Gocmez
- Namık Kemal University, Faculty of Medicine, Department of Pharmacology, 59030 Tekirdag, Turkey.
| | - Yusufhan Yazir
- Kocaeli University, Faculty of Medicine, Department of Histology and Embryology, Umuttepe 41380, Kocaeli, Turkey.
| | - Deniz Sahin
- Kocaeli University, Faculty of Medicine, Department of Physiology, Umuttepe 41380, Kocaeli, Turkey.
| | - Sabriye Karadenizli
- Kocaeli University, Faculty of Medicine, Department of Physiology, Umuttepe 41380, Kocaeli, Turkey.
| | - Tijen Utkan
- Kocaeli University, Faculty of Medicine, Department of Pharmacology and Experimental Medical Research and Application Unit, Umuttepe 41380, Kocaeli, Turkey.
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