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Eken HN, Spotts C, Panny B, Griffo A, Degutis M, Cruz N, Bell E, Do-Nguyen K, Wallace ML, Mathew SJ, Howland RH, Price RB. Improved implicit self-esteem is associated with extended antidepressant effects following a novel synergistic intervention. Mol Psychiatry 2024:10.1038/s41380-024-02564-y. [PMID: 38755245 DOI: 10.1038/s41380-024-02564-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 04/09/2024] [Accepted: 04/12/2024] [Indexed: 05/18/2024]
Abstract
INTRODUCTION In a previously published randomized controlled trial, automated self-association training (ASAT), a novel digital intervention, was found to extend the rapid antidepressant effect of a single infusion of ketamine for at least 30 days. In this secondary analysis, we aimed to understand the potential role of implicit self-esteem in the combined antidepressant effect of ketamine and ASAT training, by investigating the novel synergistic treatment's effects on implicit self-associations and their relation to symptom improvement. METHODS A total of 154 adults (ages 18-60) with treatment-resistant unipolar depression and lower-than-normative explicit self-esteem were randomized in a double-blind, parallel-arm design to receive one of three treatment allocations: an active/active treatment combination consisting of one infusion of ketamine (0.5 mg/kg) followed by four days of ASAT ( ~ 30-40 min/day), or one of two control arms that lacked either the active drug or the active behavioral component. The Implicit Association Test (IAT) was used to behaviorally assess the strength of association between self-related stimuli and negative concepts. Linear regression models were used to test the relationship between group assignment, IAT scores acquired immediately post-treatment, and both acute and extended clinical outcomes (% change in Montgomery-Asberg Depression Rating Scale scores, relative to pre-treatment baseline) in the trial. RESULTS The group assigned to ketamine + ASAT intervention, compared to the other groups, had a pattern of IAT scores indicating more positive self-associations immediately after treatment relative to the control arms (F(1, 131) = 3.979; p = 0.048). In regression models, IAT scores tracked with concurrent (acute post-treatment) % change in MADRS scores across all treatment arms (p = 0.001), and mediated more extended (Day 30) depression improvements specifically for the ketamine+ASAT arm (group * IAT interaction term: β = -0.201; p = 0.049). DISCUSSION Our findings suggest that changing implicit self-worth during a post-ketamine 'plasticity window' is one key mechanism whereby the novel ketamine+ASAT treatment combination exerts its antidepressant benefit, confirming the intended treatment target at the level of implicit cognition. Future studies should seek to further enhance the reliability of the biobehavioral intervention's impact on implicit cognition, as this mechanism appears linked to the intervention's enduring clinical benefits.
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Affiliation(s)
- H Nur Eken
- University of Pittsburgh, Pittsburgh, PA, USA
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Zolghadriha A, Anjomshoaa A, Jamshidi MR, Taherkhani F. Rapid and sustained antidepressant effects of intravenous ketamine in treatment-resistant major depressive disorder and suicidal ideation: a randomized clinical trial. BMC Psychiatry 2024; 24:341. [PMID: 38714931 PMCID: PMC11075291 DOI: 10.1186/s12888-024-05716-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 03/25/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND Major depressive disorder (MDD) is the most disabling and burdensome mental disorder, negatively affecting an individual's quality of life and daily functioning. the current study was conducted with the aim of investigating the clinical effects of intravenous ketamine on symptoms of MDD and suicidal ideation. METHODS The current randomized clinical trial was carried out on 64 patients diagnosed with treatment-resistant major depressive disorder between April and August 2022. The participants were randomly assigned to two groups: the intervention group received a dose of 0.5 mg/kg of ketamine, while the control group received normal saline. The Montgomery-Asberg Depression Scale and Beck's Suicidal Ideation Scale were utilized to assess depression and suicidal ideation, respectively. RESULTS One hour after the administration of ketamine treatment, there was a notable and significant improvement in both depression symptoms (35.16 ± 8.13 vs. 14.90 ± 10.09) and suicidal ideation (6.74 ± 6.67 vs. 0.42 ± 1.52). Moreover, there were statistically significant differences in depression scores between the two groups at one hour, four hours, one day, three days, one week, one month, and two months after the administration of ketamine (p-value < 0.001). However, ketamine recipients frequently experienced side effects such as increased heart rate, headache, dizziness, and dissociative syndrome symptoms. CONCLUSION The observed rapid onset of action and sustained effect demonstrate the potential of ketamine to provide relief from depressive symptoms in a shorter timeframe compared to traditional treatment approaches. These findings contribute to the growing body of evidence supporting the use of ketamine as a valuable therapeutic option for patients with treatment-resistant depression. IRCT REGISTRATION IRCT registration number: IRCT20210806052096N1; IRCT URL: https://www.irct.ir/trial/62243 ; Ethical code: IR.ZUMS.REC.1400.150; Registration date: 2022-04-09.
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Affiliation(s)
- Ahmad Zolghadriha
- Department of Psychiatry, Shahid Beheshti Hospital, Zanjan University of Medical Sciences, Zanjan, Iran.
| | - Afagh Anjomshoaa
- Zanjan Metabolic Diseases Research Center, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Mohammad Reza Jamshidi
- Department of Anesthesia, School of Medicine, Mousavi Hospital, Zanjan University of Medical Sciences, Iran, Zanjan
| | - Farnaz Taherkhani
- Department of Psychiatry, Shahid Beheshti Hospital, Zanjan University of Medical Sciences, Zanjan, Iran
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Zhou L, Duan J. The role of NMDARs in the anesthetic and antidepressant effects of ketamine. CNS Neurosci Ther 2024; 30:e14464. [PMID: 37680076 PMCID: PMC11017467 DOI: 10.1111/cns.14464] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 08/19/2023] [Accepted: 08/26/2023] [Indexed: 09/09/2023] Open
Abstract
BACKGROUND As a phencyclidine (PCP) analog, ketamine can generate rapid-onset and substantial anesthetic effects. Contrary to traditional anesthetics, ketamine is a dissociative anesthetic and can induce loss of consciousness in patients. Recently, the subanaesthetic dose of ketamine was found to produce rapid-onset and lasting antidepressant effects. AIM However, how different concentrations of ketamine can induce diverse actions remains unclear. Furthermore, the molecular mechanisms underlying the NMDAR-mediated anesthetic and antidepressant effects of ketamine are not fully understood. METHOD In this review, we have introduced ketamine and its metabolism, summarized recent advances in the molecular mechanisms underlying NMDAR inhibition in the anesthetic and antidepressant effects of ketamine, explored the possible functions of NMDAR subunits in the effects of ketamine, and discussed the future directions of ketamine-based anesthetic and antidepressant drugs. RESULT Both the anesthetic and antidepressant effects of ketamine were thought to be mediated by N-methyl-D-aspartate receptor (NMDAR) inhibition. CONCLUSION The roles of NMDARs have been extensively studied in the anaesthetic effects of ketamine. However, the roles of NMDARs in antidepressant effects of ketamine are complicated and controversial.
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Affiliation(s)
- Liang Zhou
- Department of Pharmacology, College of Pharmaceutical SciencesSoochow UniversitySuzhouChina
| | - Jingjing Duan
- Department of Anatomy and Neurobiology, Zhongshan School of MedicineSunYat‐sen UniversityGuangzhouChina
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Pothorszki D, Koncz S, Török D, Papp N, Bagdy G. Unique Effects of (R)-Ketamine Compared to (S)-Ketamine on EEG Theta Power in Rats. Pharmaceuticals (Basel) 2024; 17:194. [PMID: 38399409 PMCID: PMC10893209 DOI: 10.3390/ph17020194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/19/2024] [Accepted: 01/29/2024] [Indexed: 02/25/2024] Open
Abstract
Differences in the pharmacological effects of (S)-ketamine and (R)-ketamine are at the focus of research. Clinical data and our rat studies confirmed the antidepressant effect of (S)- but not (R)-ketamine, with similar differences in quantitative electroencephalogram (EEG) and sleep effects. In contrast, studies mainly on mice showed some stronger, preferable effects of (R)-ketamine. EEG theta (5-9 Hz) rhythm originates from the hippocampus, and its power is associated with cognitive functions, attention, and decreased anxiety. To find a brain parameter that is not associated with the antidepressant effect of drugs and may confirm potent in vivo effects of (R)-ketamine in rats, theta EEG power-inducing effects of the two enantiomers were measured and compared for 23 h. EEG-equipped Wistar rats were treated with (R)-ketamine (7.5, 15, 30 mg/kg i.p.), (S)-ketamine (7.5 and 15 mg/kg i.p.), or vehicle at the beginning of the passive phase. Frontoparietal EEG, electromyogram, and motor activity were recorded. (R)-ketamine but not (S)-ketamine dose-dependently increased EEG theta power during wakefulness and rapid eye movement (REM) sleep for 23 h. These results suggest that (R)-ketamine has an effect on a hippocampal function that was not affected by (S)-ketamine and may be associated with neural plasticity and memory encoding.
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Affiliation(s)
- Dóra Pothorszki
- Department of Pharmacodynamics, Faculty of Pharmaceutical Sciences, Semmelweis University, 1089 Budapest, Hungary; (D.P.); (S.K.); (D.T.); (N.P.)
- NAP3.0-SE Neuropsychopharmacology Research Group, Hungarian Brain Research Program, Semmelweis University, 1089 Budapest, Hungary
| | - Szabolcs Koncz
- Department of Pharmacodynamics, Faculty of Pharmaceutical Sciences, Semmelweis University, 1089 Budapest, Hungary; (D.P.); (S.K.); (D.T.); (N.P.)
- NAP3.0-SE Neuropsychopharmacology Research Group, Hungarian Brain Research Program, Semmelweis University, 1089 Budapest, Hungary
| | - Dóra Török
- Department of Pharmacodynamics, Faculty of Pharmaceutical Sciences, Semmelweis University, 1089 Budapest, Hungary; (D.P.); (S.K.); (D.T.); (N.P.)
- NAP3.0-SE Neuropsychopharmacology Research Group, Hungarian Brain Research Program, Semmelweis University, 1089 Budapest, Hungary
| | - Noémi Papp
- Department of Pharmacodynamics, Faculty of Pharmaceutical Sciences, Semmelweis University, 1089 Budapest, Hungary; (D.P.); (S.K.); (D.T.); (N.P.)
| | - György Bagdy
- Department of Pharmacodynamics, Faculty of Pharmaceutical Sciences, Semmelweis University, 1089 Budapest, Hungary; (D.P.); (S.K.); (D.T.); (N.P.)
- NAP3.0-SE Neuropsychopharmacology Research Group, Hungarian Brain Research Program, Semmelweis University, 1089 Budapest, Hungary
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Ryan K, Hosanagar A. Ketamine Use in Child and Adolescent Psychiatry: Emerging Data in Treatment-Resistant Depression, Insights from Adults, and Future Directions. Curr Psychiatry Rep 2023; 25:337-344. [PMID: 37389787 DOI: 10.1007/s11920-023-01432-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/30/2023] [Indexed: 07/01/2023]
Abstract
PURPOSE OF REVIEW The following review will explore ketamine's antidepressant and antisuicidal properties in adults, review of what is known about ketamine's safety in children, and summarize the limited information we have on ketamine's role in treating depression and suicidal ideation in adolescents with depression. Future directions for ketamine's role in child psychiatry based on animal and adult studies will also be explored. RECENT FINDINGS Over the past 20 years, ketamine has emerged as a novel treatment for depression and suicidal ideation in adults. In recent years, these studies have been extended to adolescents. In 2021, the first placebo-controlled trial examining ketamine's antidepressant potential in adolescents was performed, demonstrating superior efficacy over midazolam. Initial studies suggest that ketamine functions as a rapidly acting antidepressant in adolescents. Case reports suggest that ketamine may also reduce suicidal ideation in this population. However, existing studies are small, and more research is needed to solidify these findings and inform clinical practice.
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Affiliation(s)
- Kaitlyn Ryan
- Department of Psychiatry, Adolescent Partial Hospitalization Program, Trinity Health Ann Arbor Hospital, Ann Arbor, MI, USA.
| | - Avinash Hosanagar
- Department of Psychiatry, University of Michigan Medical School, Ann Arbor, MI, USA
- Mental Health Service, VA Ann Arbor Healthcare System, Ann Arbor, MI, USA
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Esalatmanesh S, Kashani L, Akhondzadeh S. Effects of Antidepressant Medication on Brain-derived Neurotrophic Factor Concentration and Neuroplasticity in Depression: A Review of Preclinical and Clinical Studies. Avicenna J Med Biotechnol 2023; 15:129-138. [PMID: 37538241 PMCID: PMC10634295 DOI: 10.18502/ajmb.v15i3.12921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 03/30/2023] [Indexed: 08/05/2023] Open
Abstract
Depression is the most prevalent and debilitating disease with great impact on societies. Evidence suggests Brain-Derived Neurotrophic Factor (BDNF) plays an important role in pathophysiology of depression. Depression is associated with altered synaptic plasticity and neurogenesis. BDNF is the main regulatory protein that affects neuronal plasticity in the hippocampus. A wealth of evidence shows decreased levels of BDNF in depressed patients. Important literature demonstrated that BDNF-TrkB signaling plays a key role in therapeutic action of antidepressants. Numerous studies have reported anti-depressant effects on serum/plasma levels of BDNF and neuroplasticity which may be related to improvement of depressive symptoms. Most of the evidence suggested increased levels of BDNF after antidepressant treatment. This review will summarize recent findings on the association between BDNF, neuroplasticity, and antidepressant response in depression. Also, we will review recent studies that evaluate the association between postpartum depression as a subtype of depression and BDNF levels in postpartum women.
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Affiliation(s)
| | - Ladan Kashani
- Arash Women Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Shahin Akhondzadeh
- Psychiatric Research Center, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran
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Martinotti G, Dell'Osso B, Di Lorenzo G, Maina G, Bertolino A, Clerici M, Barlati S, Rosso G, Di Nicola M, Marcatili M, d'Andrea G, Cavallotto C, Chiappini S, De Filippis S, Nicolò G, De Fazio P, Andriola I, Zanardi R, Nucifora D, Di Mauro S, Bassetti R, Pettorruso M, McIntyre RS, Sensi SL, di Giannantonio M, Vita A. Treating bipolar depression with esketamine: Safety and effectiveness data from a naturalistic multicentric study on esketamine in bipolar versus unipolar treatment-resistant depression. Bipolar Disord 2023; 25:233-244. [PMID: 36636839 DOI: 10.1111/bdi.13296] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
BACKGROUND Bipolar depression accounts for most of the disease duration in type I and type II bipolar disorder (BD), with few treatment options, often poorly tolerated. Many individuals do not respond to first-line therapeutic options, resulting in treatment-resistant bipolar depression (B-TRD). Esketamine, the S-enantiomer of ketamine, has recently been approved for treatment-resistant depression (TRD), but no data are available on its use in B-TRD. OBJECTIVES To compare the efficacy of esketamine in two samples of unipolar and bipolar TRD, providing preliminary indications of its effectiveness in B-TRD. Secondary outcomes included the evaluation of the safety and tolerability of esketamine in B-TRD, focusing on the average risk of an affective switch. METHODS Thirty-five B-TRD subjects treated with esketamine nasal spray were enrolled and compared with 35 TRD patients. Anamnestic data and psychometric assessments (Montgomery-Asberg Depression Rating Scale/MADRS, Hamilton-depression scale/HAM-D, Hamilton-anxiety scale/HAM-A) were collected at baseline (T0), at one month (T1), and three months (T2) follow up. RESULTS A significant reduction in depressive symptoms was found at T1 and T2 compared to T0, with no significant differences in response or remission rates between subjects with B-TRD and TRD. Esketamine showed a greater anxiolytic action in subjects with B-TRD than in those with TRD. Improvement in depressive symptoms was not associated with treatment-emergent affective switch. CONCLUSIONS Our results supported the effectiveness and tolerability of esketamine in a real-world population of subjects with B-TRD. The low risk of manic switch in B-TRD patients confirmed the safety of this treatment.
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Affiliation(s)
- Giovanni Martinotti
- Department of Neurosciences, Imaging and Clinical Sciences, Università degli Studi G. D'Annunzio, Chieti, Italy
- Psychopharmacology, Drug Misuse and Novel Psychoactive Substances Research Unit, School of Life and Medical Sciences, University of Hertfordshire, Hatfield, UK
| | - Bernardo Dell'Osso
- Department of Biomedical and Clinical Sciences Luigi Sacco and Aldo Ravelli Center for Neurotechnology and Brain Therapeutic, University of Milan, Milano, Italy
| | - Giorgio Di Lorenzo
- Chair of Psychiatry, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
- IRCCS Fondazione Santa Lucia, Rome, Italy
| | - Giuseppe Maina
- Department of Neurosciences Rita Levi Montalcini, University of Torino, Turin, Italy
| | | | - Massimo Clerici
- Department of Mental Health and Addiction, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy
| | - Stefano Barlati
- Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
- Department of Mental Health and Addiction Services, ASST Spedali Civili of Brescia, Italy
| | - Gianluca Rosso
- Department of Neurosciences Rita Levi Montalcini, University of Torino, Turin, Italy
| | - Marco Di Nicola
- Section of Psychiatry, Department of Neuroscience, Università Cattolica del Sacro Cuore, Rome, Italy
- Department of Psychiatry, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Matteo Marcatili
- Department of Mental Health and Addiction, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy
| | - Giacomo d'Andrea
- Department of Neurosciences, Imaging and Clinical Sciences, Università degli Studi G. D'Annunzio, Chieti, Italy
| | - Clara Cavallotto
- Department of Neurosciences, Imaging and Clinical Sciences, Università degli Studi G. D'Annunzio, Chieti, Italy
| | - Stefania Chiappini
- Department of Neurosciences, Imaging and Clinical Sciences, Università degli Studi G. D'Annunzio, Chieti, Italy
- Psychopharmacology, Drug Misuse and Novel Psychoactive Substances Research Unit, School of Life and Medical Sciences, University of Hertfordshire, Hatfield, UK
| | | | - Giuseppe Nicolò
- Department of Mental Health and Addiction, ASL Roma 5, Rome, Italy
| | - Pasquale De Fazio
- Psychiatry Unit, Department of Health Sciences, University Magna Graecia of Catanzaro, Catanzaro, Italy
| | | | - Raffaella Zanardi
- Mood Disorder Unit, Department of Clinical Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Department of Clinical Neurosciences, University Vita-Salute San Raffaele, Milan, Italy
| | | | | | - Roberta Bassetti
- Department of Mental Health and Addiction Services, Niguarda Hospital, Milan, Italy
| | - Mauro Pettorruso
- Department of Neurosciences, Imaging and Clinical Sciences, Università degli Studi G. D'Annunzio, Chieti, Italy
| | - Roger S McIntyre
- Mood Disorders Psychopharmacology Unit, Poul Hansen Family Centre for Depression, University Health Network, ON, Toronto, Canada
- Department of Pharmacology and Toxicology, University of Toronto, ON, Toronto, Canada
- Canadian Rapid Treatment Center of Excellence, ON, Mississauga, Canada
- Brain and Cognition Discovery Foundation, ON, Toronto, Canada
- Department of Psychiatry, University of Toronto, ON, Toronto, Canada
| | - Stefano L Sensi
- Department of Neurosciences, Imaging and Clinical Sciences, Università degli Studi G. D'Annunzio, Chieti, Italy
| | - Massimo di Giannantonio
- Department of Neurosciences, Imaging and Clinical Sciences, Università degli Studi G. D'Annunzio, Chieti, Italy
| | - Antonio Vita
- Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
- Department of Mental Health and Addiction Services, ASST Spedali Civili of Brescia, Italy
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Golubeva EA, Lavrov MI, Radchenko EV, Palyulin VA. Diversity of AMPA Receptor Ligands: Chemotypes, Binding Modes, Mechanisms of Action, and Therapeutic Effects. Biomolecules 2022; 13:biom13010056. [PMID: 36671441 PMCID: PMC9856200 DOI: 10.3390/biom13010056] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/19/2022] [Accepted: 12/23/2022] [Indexed: 12/29/2022] Open
Abstract
L-Glutamic acid is the main excitatory neurotransmitter in the central nervous system (CNS). Its associated receptors localized on neuronal and non-neuronal cells mediate rapid excitatory synaptic transmission in the CNS and regulate a wide range of processes in the brain, spinal cord, retina, and peripheral nervous system. In particular, the glutamate receptors selective to α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) also play an important role in numerous neurological disorders and attract close attention as targets for the creation of new classes of drugs for the treatment or substantial correction of a number of serious neurodegenerative and neuropsychiatric diseases. For this reason, the search for various types of AMPA receptor ligands and studies of their properties are attracting considerable attention both in academic institutions and in pharmaceutical companies around the world. This review focuses mainly on the advances in this area published since 2017. Particular attention is paid to the structural diversity of new chemotypes of agonists, competitive AMPA receptor antagonists, positive and negative allosteric modulators, transmembrane AMPA regulatory protein (TARP) dependent allosteric modulators, ion channel blockers as well as their binding sites. This review also presents the studies of the mechanisms of action of AMPA receptor ligands that mediate their therapeutic effects.
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Pros and cons of esketamine treatment in psychiatry. Eur Neuropsychopharmacol 2022; 65:12-14. [PMID: 36183556 DOI: 10.1016/j.euroneuro.2022.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/07/2022] [Accepted: 09/09/2022] [Indexed: 11/21/2022]
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The Downstaging Concept in Treatment-Resistant Depression: Spotlight on Ketamine. Int J Mol Sci 2022; 23:ijms232314605. [PMID: 36498934 PMCID: PMC9738502 DOI: 10.3390/ijms232314605] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 11/17/2022] [Accepted: 11/21/2022] [Indexed: 11/24/2022] Open
Abstract
Treatment-resistant depression is a pleomorphic phenomenon occurring in 30% of patients with depression. The chance to achieve remission decreases with every subsequent episode. It constitutes a significant part of the global disease burden, causes increased morbidity and mortality, and is associated with poor quality of life. It involves multiple difficult-to-treat episodes, with increasing resistance over time. The concept of staging captures the process of changes causing increasing treatment resistance and global worsening of functioning in all areas of life. Ketamine is a novel rapid-acting antidepressant with neuroplastic potential. Here, we argue that ketamine use as an add-on treatment of resistant major depressive disorder, based on its unique pharmacological properties, can reverse this process, give hope to patients, and prevent therapeutic nihilism.
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German-Ponciano LJ, Rosas-Sánchez GU, Cueto-Escobedo J, Fernández-Demeneghi R, Guillén-Ruiz G, Soria-Fregozo C, Herrera-Huerta EV, Rodríguez-Landa JF. Participation of the Serotonergic System and Brain-Derived Neurotrophic Factor in the Antidepressant-like Effect of Flavonoids. Int J Mol Sci 2022; 23:ijms231810896. [PMID: 36142808 PMCID: PMC9505567 DOI: 10.3390/ijms231810896] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 09/10/2022] [Accepted: 09/11/2022] [Indexed: 11/16/2022] Open
Abstract
Depressive disorders are among the most disabling diseases experienced around the world, and their incidence has significantly increased over the last few decades due to multiple environmental, social, and biological factors. The search for new pharmacological alternatives to treat depression is a global priority. In preclinical research, molecules obtained from plants, such as flavonoids, have shown promising antidepressant-like properties through several mechanisms of action that have not been fully elucidated, including crossing of the blood brain barrier (BBB). This review will focus on discussing the main findings related to the participation of the serotonergic system and brain-derived neurotrophic factor (BDNF) on the antidepressant-like effect of some flavonoids reported by behavioral, neurochemical, and molecular studies. In this sense, evidence shows that depressive individuals have low levels of serotonin and BDNF, while flavonoids can reverse it. Finally, the elucidation of the mechanism used by flavonoids to modulate serotonin and BDNF will contribute to our understanding of the neurobiological bases underlying the antidepressant-like effects produced by these natural compounds.
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Affiliation(s)
| | | | - Jonathan Cueto-Escobedo
- Departamento de Investigación Clínica y Traslacional Instituto de Ciencias de la Salud, Universidad Veracruzana, Xalapa 91190, Mexico
| | | | - Gabriel Guillén-Ruiz
- Programa de Investigadoras e Investigadores por México CONACyT-Instituto de Neuroetología, Universidad Veracruzana, Xalapa 91190, Mexico
| | - César Soria-Fregozo
- Centro Universitario de Los Lagos, Universidad de Guadalajara, Lagos de Moreno 47460, Mexico
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