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Cao Y, Chi X, Chen G, Ji L, Zhang W. Parenting behaviors, inhibitory control, and aggression: Moderation by serotonin receptor 2A haplotypes. J Fam Psychol 2024; 38:411-420. [PMID: 38300533 DOI: 10.1037/fam0001202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
Despite the well-established relationship between parenting and child aggression, the mechanisms by which children incur this risk and whether genetic sources contribute to the heterogeneity in their vulnerability are not entirely clear. This study utilized a longitudinal sample of adolescents (n = 1,047, 50.2% females, Mage = 13.32 ± 0.48 years at Time 1) to examine the effects of positive and negative parenting on aggression, as mediated by inhibitory control and moderated by the serotonin receptor 2A (5-HTR2A) haplotype. Mediation analysis revealed that inhibitory control indirectly mediated the link between both positive and negative parenting and overt aggression but not relational aggression. Further, the indirect effect of negative parenting on overt aggression via inhibitory control was moderated by the 5-HTR2A haplotype. Compared to adolescents carrying zero copies of Thymine-Thymine haplotype, those with one copy of Thymine-Thymine haplotype had better inhibitory control when experiencing less negative parenting, which buffers the risk for overt aggression. However, the mediating role of inhibitory control did not hold in the positive parenting model. These findings elucidate the manner by which adolescents with different genetic predispositions develop aggressive behaviors in the context of family and suggest different etiology of overt and relational aggression. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
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Affiliation(s)
- Yanmiao Cao
- Department of Psychology, Shandong Normal University
| | - Xiaohui Chi
- Department of Psychology, Shandong Normal University
| | - Guanghui Chen
- Department of Psychology, Shandong Normal University
| | - Linqin Ji
- Department of Psychology, Shandong Normal University
| | - Wenxin Zhang
- Department of Psychology, Shandong Normal University
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Arias HR, Rudin D, Hines DJ, Contreras A, Gulsevin A, Manetti D, Anouar Y, De Deurwaerdere P, Meiler J, Romanelli MN, Liechti ME, Chagraoui A. The novel non-hallucinogenic compound DM506 (3-methyl-1,2,3,4,5,6-hexahydroazepino[4,5-b]indole) induces sedative- and anxiolytic-like activity in mice by a mechanism involving 5-HT 2A receptor activation. Eur J Pharmacol 2024; 966:176329. [PMID: 38253116 DOI: 10.1016/j.ejphar.2024.176329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 01/24/2024]
Abstract
The anxiolytic and sedative-like effects of 3-methyl-1,2,3,4,5,6-hexahydroazepino[4,5-b]indole (DM506), a non-hallucinogenic compound derived from ibogamine, were studied in mice. The behavioral effects were examined using Elevated O-maze and novelty suppressed feeding (NSFT) tests, open field test, and loss of righting reflex (LORR) test. The results showed that 15 mg/kg DM506 induced acute and long-lasting anxiolytic-like activity in naive and stressed/anxious mice, respectively. Repeated administration of 5 mg/kg DM506 did not cause cumulative anxiolytic activity or any side effects. Higher doses of DM506 (40 mg/kg) induced sedative-like activity, which was inhibited by a selective 5-HT2A receptor antagonist, volinanserin. Electroencephalography results showed that 15 mg/kg DM506 fumarate increased the transition from a highly alert state (fast γ wavelength) to a more synchronized deep-sleeping activity (δ wavelength), which is reflected in the sedative/anxiolytic activity in mice but without the head-twitch response observed in hallucinogens. The functional, radioligand binding, and molecular docking results showed that DM506 binds to the agonist sites of human 5-HT2A (Ki = 24 nM) and 5-HT2B (Ki = 16 nM) receptors and activates them with a potency (EC50) of 9 nM and 3 nM, respectively. DM506 was relatively less potent and behaved as a partial agonist (efficacy <80%) for both receptor subtypes compared to the full agonist DOI (2,5-dimethoxy-4-iodoamphetamine). Our study showed for the first time that the non-hallucinogenic compound DM506 induces anxiolytic- and sedative-like activities in naïve and stressed/anxious mice in a dose-, time-, and volinanserin-sensitive manner, likely through mechanisms involving 5-HT2A receptor activation.
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Affiliation(s)
- Hugo R Arias
- Department of Pharmacology and Physiology, Oklahoma State University College of Osteopathic Medicine, Tahlequah, OK, USA
| | - Deborah Rudin
- Divison of Clinical Pharmacology and Toxicology, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland; Division of Clinical Pharmacology and Toxicology, Department of Biomedicine, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Dustin J Hines
- Psychological and Brain Sciences, University of Nevada, Las Vegas, NV, USA
| | - April Contreras
- Psychological and Brain Sciences, University of Nevada, Las Vegas, NV, USA
| | - Alican Gulsevin
- Department of Chemistry, Vanderbilt University, Nashville, TN, USA; Center for Structural Biology, Vanderbilt University, Nashville, TN, USA
| | - Dina Manetti
- Department of Neurosciences, Psychology, Drug Research and Child Health Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Italy
| | - Youssef Anouar
- UNIROUEN, Inserm U1239, Neuroendocrine, Endocrine and Germinal Differentiation and Communication (NorDiC), Rouen Normandie University, 76000, Mont-Saint-Aignan, France
| | - Philippe De Deurwaerdere
- Centre National de la Recherche Scientifique, Institut des Neurosciences Integratives et Cognitives d'Aquitaine, UMR, 5287, Bordeaux, France
| | - Jens Meiler
- Institute for Drug Discovery, Leipzig University Medical School, 04103, Leipzig, Germany
| | - Maria Novella Romanelli
- Department of Neurosciences, Psychology, Drug Research and Child Health Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Italy
| | - Matthias E Liechti
- Divison of Clinical Pharmacology and Toxicology, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland; Division of Clinical Pharmacology and Toxicology, Department of Biomedicine, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Abdeslam Chagraoui
- Department of Medical Biochemistry, Rouen University Hospital, CHU de Rouen, France; UNIROUEN, Inserm U1239, Neuroendocrine, Endocrine and Germinal Differentiation and Communication (NorDiC), Rouen Normandie University, 76000, Mont-Saint-Aignan, France.
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Sekssaoui M, Bockaert J, Marin P, Bécamel C. Antidepressant-like effects of psychedelics in a chronic despair mouse model: is the 5-HT 2A receptor the unique player? Neuropsychopharmacology 2024; 49:747-756. [PMID: 38212441 PMCID: PMC10876623 DOI: 10.1038/s41386-024-01794-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 12/21/2023] [Accepted: 12/28/2023] [Indexed: 01/13/2024]
Abstract
Major depressive disorder (MDD) is one of the most disabling psychiatric disorders in the world. First-line treatments such as selective serotonin reuptake inhibitors (SSRIs) still have many limitations, including a resistance to treatment in 30% of patients and a delayed clinical benefit that is observed only after several weeks of treatment. Increasing clinical evidence indicates that the acute administration of psychedelic agonists of the serotonin 5-HT2A receptor (5-HT2AR), such as psilocybin, to patients with MDD induce fast antidepressant effects, which persist up to five weeks after the treatment. However, the involvement of the 5-HT2AR in these antidepressant effects remains controversial. Furthermore, whether the hallucinogenic properties of 5-HT2AR agonists are mandatory to their antidepressant activity is still an open question. Here, we addressed these issues by investigating the effect of two psychedelics of different chemical families, DOI and psilocybin, and a non-hallucinogenic 5-HT2AR agonist, lisuride, in a chronic despair mouse model exhibiting a robust depressive-like phenotype. We show that a single injection of each drug to wild type mice induces anxiolytic- and antidepressant-like effects in the novelty-suppressed feeding, sucrose preference and forced swim tests, which last up to 15 days. DOI and lisuride administration did not produce antidepressant-like effects in 5-HT2A-/- mice, whereas psilocybin was still effective. Moreover, neither 5-HT1AR blockade nor dopamine D1 or D2 receptor blockade affected the antidepressant-like effects of psilocybin in 5-HT2A-/- mice. Collectively, these findings indicate that 5-HT2AR agonists can produce antidepressant-like effects independently of hallucinogenic properties through mechanisms involving or not involving the receptor.
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Affiliation(s)
- Mehdi Sekssaoui
- Institut de Génomique Fonctionnelle, Université de Montpellier, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, F-34094, Montpellier, France
| | - Joël Bockaert
- Institut de Génomique Fonctionnelle, Université de Montpellier, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, F-34094, Montpellier, France
| | - Philippe Marin
- Institut de Génomique Fonctionnelle, Université de Montpellier, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, F-34094, Montpellier, France
| | - Carine Bécamel
- Institut de Génomique Fonctionnelle, Université de Montpellier, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, F-34094, Montpellier, France.
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Soares BA, Yempala T, Martínez-Afani D, Acevedo-Fuentes W, Brea J, Loza MI, Cimadevila M, Cassels BK. Effect of Bulky N-Dibenzofuranylmethyl Substitution on the 5-HT 2 Receptor Affinity and Efficacy of a Psychedelic Phenethylamine. ACS Chem Neurosci 2024; 15:608-616. [PMID: 38241462 DOI: 10.1021/acschemneuro.3c00639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2024] Open
Abstract
The introduction of arylmethyl substituents on the amine nitrogen atom of phenethylamines and tryptamines often results in profound increases in their affinity and functional activity at 5-HT2 serotonin receptors. To probe the sensitivity of this effect to substantially larger N-substituents, ten derivatives of the well-characterized psychedelic phenethylamine 2C-B were prepared by appending different dibenzo[b,d]furylmethyl (DBFM) moieties to the basic nitrogen. The DBFM group attached to the amino group through its 1-, -2-, or 3-position decreased affinity and agonist activity at the 5-HT2A/2C receptors. Substitution through the 4-position usually favored affinity for all three 5-HT2 receptor subtypes with compound 5 exhibiting 10- and 40-fold higher affinities at the 5-HT2A and 5-HT2C receptors, respectively, but less than fourfold selectivity among the three receptor subtypes. Nevertheless, all were relatively weak partial 5-HT2AR agonists, mostly in the low micromolar range, but full or nearly full agonists at the 5-HT2C subtype as determined in a calcium mobilization assay. Molecular docking simulations suggested that the dibenzofuryl portion dives more deeply into the orthosteric binding site of the 5-HT2A than the 5-HT2C receptor, interacting with the Trp3366.48 toggle switch associated with its activation, while the phenylamine moiety lies close to the extracellular side of the receptor. In conclusion, a very bulky N-substituent on a phenethylamine 5-HT2 receptor agonist is tolerated and may increase affinity if its orientation is appropriate. However, the Gq protein-mediated potencies are generally low, with low efficacy (relative to 5-HT) at the 5-HT2A receptor, somewhat higher efficacy at the 5-HT2B subtype, and full or nearly full efficacy at the 5-HT2C subtype.
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Affiliation(s)
- Breno A Soares
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago 780003, Chile
- Institute of Exact and Technological Sciences, Federal University of Jataí, Jataí 75804 Goiás, Brazil
| | - Thirumal Yempala
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago 780003, Chile
| | - Darío Martínez-Afani
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago 780003, Chile
| | | | - José Brea
- Biofarma Research Group, CiMUS, Departamento de Farmacología, Facultad de Farmacia, Universidade de Santiago de Compostela, Santiago 15705, Spain
| | - María Isabel Loza
- Biofarma Research Group, CiMUS, Departamento de Farmacología, Facultad de Farmacia, Universidade de Santiago de Compostela, Santiago 15705, Spain
| | - Marta Cimadevila
- Biofarma Research Group, CiMUS, Departamento de Farmacología, Facultad de Farmacia, Universidade de Santiago de Compostela, Santiago 15705, Spain
| | - Bruce K Cassels
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago 780003, Chile
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Fletcher PJ, Li Z, Ji XD, Lê AD. Established sensitization of ethanol-induced locomotor activity is not reversed by psilocybin or the 5-HT 2A receptor agonist TCB-2 in male DBA/2J mice. Pharmacol Biochem Behav 2024; 235:173703. [PMID: 38154589 DOI: 10.1016/j.pbb.2023.173703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 11/28/2023] [Accepted: 12/22/2023] [Indexed: 12/30/2023]
Abstract
RATIONALE Psychedelic drugs, which share in common 5-HT2A receptor agonist activity, have shown promise in treating alcohol-use disorders (AUDs). Repeated exposure to ethanol (EtOH) induces molecular and behavioural changes reflective of neuroadaptations that may contribute to addiction. Psychedelic drugs can induce neuroplasticity also, raising the possibility that their potential clinical effects in AUD may involve an action to reverse or offset effects of long-term changes induced by EtOH. This possibility was examined by investigating whether psilocybin, or the 5-HT2A receptor agonist TCB-2, counteracted established sensitization of EtOH-induced locomotor activity. METHODS Male DBA/2J mice received repeated injections of 2.2 g/kg EtOH to induce a sensitized locomotor activity response. In two experiments separate groups of mice were then injected with psilocybin (0, 0.3 and 1 kg/kg) or TCB-2 (0, 1 and 3 mg/kg) on 5 consecutive days. Next, mice were challenged with 1.8 g/kg EtOH and locomotor activity measured for 15 min. RESULTS Relative to naïve controls, previously sensitized mice showed enhanced locomotor activity to the challenge dose. Despite reducing locomotor activity in their own right psilocybin and TCB-2 did not alter the strength of this sensitized response. CONCLUSION Psilocybin and TCB-2 at behaviourally effective doses did not reverse sensitization of EtOH-induced activity. This suggests that mechanisms involved in mediating short-term reductions in EtOH intake by psilocybin or TCB-2 may not involve a capacity of these drugs to offset enduring changes in behaviour and any underlying neural adaptations induced by repeated intermittent exposure to EtOH.
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Affiliation(s)
- Paul J Fletcher
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada; Department of Psychology, University of Toronto, Toronto, ON, Canada; Department of Psychiatry, University of Toronto, Toronto, ON, Canada.
| | - Zhaoxia Li
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - Xiao Dong Ji
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - Anh D Lê
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada; Department of Psychiatry, University of Toronto, Toronto, ON, Canada; Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
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Abstract
Psychedelics make up a group of psychoactive compounds that induce hallucinogenic effects by activating the serotonin 2A receptor (5-HT2AR). Clinical trials have demonstrated the traditional psychedelic substances like psilocybin as a class of rapid-acting and long-lasting antidepressants. However, there is a pressing need for rationally designed 5-HT2AR agonists that possess optimal pharmacological profiles in order to fully reveal the therapeutic potential of these agonists and identify safer drug candidates devoid of hallucinogenic effects. This Perspective provides an overview of the structure-activity relationships of existing 5-HT2AR agonists based on their chemical classifications and discusses recent advancements in understanding their molecular pharmacology at a structural level. The encouraging clinical outcomes of psychedelics in depression treatment have sparked drug discovery endeavors aimed at developing novel 5-HT2AR agonists with improved subtype selectivity and signaling bias properties, which could serve as safer and potentially nonhallucinogenic antidepressants. These efforts can be significantly expedited through the utilization of structure-based methods and functional selectivity-directed screening.
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Affiliation(s)
- Wenwen Duan
- iHuman Institute, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Dongmei Cao
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences; University of Chinese Academy of Sciences, 320 Yueyang Road, Shanghai 200031, China
| | - Sheng Wang
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences; University of Chinese Academy of Sciences, 320 Yueyang Road, Shanghai 200031, China
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| | - Jianjun Cheng
- iHuman Institute, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
- School of Life Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
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Luppi AI, Girn M, Rosas FE, Timmermann C, Roseman L, Erritzoe D, Nutt DJ, Stamatakis EA, Spreng RN, Xing L, Huttner WB, Carhart-Harris RL. A role for the serotonin 2A receptor in the expansion and functioning of human transmodal cortex. Brain 2024; 147:56-80. [PMID: 37703310 DOI: 10.1093/brain/awad311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 08/14/2023] [Accepted: 08/18/2023] [Indexed: 09/15/2023] Open
Abstract
Integrating independent but converging lines of research on brain function and neurodevelopment across scales, this article proposes that serotonin 2A receptor (5-HT2AR) signalling is an evolutionary and developmental driver and potent modulator of the macroscale functional organization of the human cerebral cortex. A wealth of evidence indicates that the anatomical and functional organization of the cortex follows a unimodal-to-transmodal gradient. Situated at the apex of this processing hierarchy-where it plays a central role in the integrative processes underpinning complex, human-defining cognition-the transmodal cortex has disproportionately expanded across human development and evolution. Notably, the adult human transmodal cortex is especially rich in 5-HT2AR expression and recent evidence suggests that, during early brain development, 5-HT2AR signalling on neural progenitor cells stimulates their proliferation-a critical process for evolutionarily-relevant cortical expansion. Drawing on multimodal neuroimaging and cross-species investigations, we argue that, by contributing to the expansion of the human cortex and being prevalent at the apex of its hierarchy in the adult brain, 5-HT2AR signalling plays a major role in both human cortical expansion and functioning. Owing to its unique excitatory and downstream cellular effects, neuronal 5-HT2AR agonism promotes neuroplasticity, learning and cognitive and psychological flexibility in a context-(hyper)sensitive manner with therapeutic potential. Overall, we delineate a dual role of 5-HT2ARs in enabling both the expansion and modulation of the human transmodal cortex.
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Affiliation(s)
- Andrea I Luppi
- Department of Clinical Neurosciences and Division of Anaesthesia, University of Cambridge, Cambridge, CB2 0QQ, UK
- Leverhulme Centre for the Future of Intelligence, University of Cambridge, Cambridge, CB2 1SB, UK
- The Alan Turing Institute, London, NW1 2DB, UK
| | - Manesh Girn
- Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal, H3A 2B4, Canada
- Psychedelics Division-Neuroscape, Department of Neurology, University of California SanFrancisco, San Francisco, CA 94158, USA
| | - Fernando E Rosas
- Centre for Psychedelic Research, Department of Brain Sciences, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK
- Data Science Institute, Imperial College London, London, SW7 2AZ, UK
- Centre for Complexity Science, Imperial College London, London, SW7 2AZ, UK
| | - Christopher Timmermann
- Centre for Psychedelic Research, Department of Brain Sciences, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK
| | - Leor Roseman
- Centre for Psychedelic Research, Department of Brain Sciences, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK
| | - David Erritzoe
- Centre for Psychedelic Research, Department of Brain Sciences, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK
| | - David J Nutt
- Centre for Psychedelic Research, Department of Brain Sciences, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK
| | - Emmanuel A Stamatakis
- Department of Clinical Neurosciences and Division of Anaesthesia, University of Cambridge, Cambridge, CB2 0QQ, UK
| | - R Nathan Spreng
- Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal, H3A 2B4, Canada
| | - Lei Xing
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, 01307, Germany
| | - Wieland B Huttner
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, 01307, Germany
| | - Robin L Carhart-Harris
- Psychedelics Division-Neuroscape, Department of Neurology, University of California SanFrancisco, San Francisco, CA 94158, USA
- Centre for Psychedelic Research, Department of Brain Sciences, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK
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Wojtas A, Gołembiowska K. Molecular and Medical Aspects of Psychedelics. Int J Mol Sci 2023; 25:241. [PMID: 38203411 PMCID: PMC10778977 DOI: 10.3390/ijms25010241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/17/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
Psychedelics belong to the oldest psychoactive drugs. They arouse recent interest due to their therapeutic applications in the treatment of major depressive disorder, substance use disorder, end-of-life anxiety,= and anxiety symptoms, and obsessive-compulsive disorder. In this review, the current state of preclinical research on the mechanism of action, neurotoxicity, and behavioral impact of psychedelics is summarized. The effect of selective 5-HT2A receptor agonists, 25I- and 25B-NBOMe, after acute and repeated administration is characterized and compared with the effects of a less selective drug, psilocybin. The data show a significant effect of NBOMes on glutamatergic, dopaminergic, serotonergic, and cholinergic neurotransmission in the frontal cortex, striatum, and nucleus accumbens. The increases in extracellular levels of neurotransmitters were not dose-dependent, which most likely resulted from the stimulation of the 5-HT2A receptor and subsequent activation of the 5-HT2C receptors. This effect was also observed in the wet dog shake test and locomotor activity. Chronic administration of NBOMes elicited rapid development of tolerance, genotoxicity, and activation of microglia. Acute treatment with psilocybin affected monoaminergic and aminoacidic neurotransmitters in the frontal cortex, nucleus accumbens, and hippocampus but not in the amygdala. Psilocybin exhibited anxiolytic properties resulting from intensification of GABAergic neurotransmission. The data indicate that NBOMes as selective 5-HT2A agonists exert a significant effect on neurotransmission and behavior of rats while also inducing oxidative DNA damage. In contrast to NBOMes, the effects induced by psilocybin suggest a broader therapeutic index of this drug.
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Affiliation(s)
| | - Krystyna Gołembiowska
- Unit II, Department of Pharmacology, Maj Institute of Pharmacology Polish Academy of Sciences, 12 Smętna Street, 31-343 Kraków, Poland;
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9
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Wallach J, Cao AB, Calkins MM, Heim AJ, Lanham JK, Bonniwell EM, Hennessey JJ, Bock HA, Anderson EI, Sherwood AM, Morris H, de Klein R, Klein AK, Cuccurazzu B, Gamrat J, Fannana T, Zauhar R, Halberstadt AL, McCorvy JD. Identification of 5-HT 2A receptor signaling pathways associated with psychedelic potential. Nat Commun 2023; 14:8221. [PMID: 38102107 PMCID: PMC10724237 DOI: 10.1038/s41467-023-44016-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 11/27/2023] [Indexed: 12/17/2023] Open
Abstract
Serotonergic psychedelics possess considerable therapeutic potential. Although 5-HT2A receptor activation mediates psychedelic effects, prototypical psychedelics activate both 5-HT2A-Gq/11 and β-arrestin2 transducers, making their respective roles unclear. To elucidate this, we develop a series of 5-HT2A-selective ligands with varying Gq efficacies, including β-arrestin-biased ligands. We show that 5-HT2A-Gq but not 5-HT2A-β-arrestin2 recruitment efficacy predicts psychedelic potential, assessed using head-twitch response (HTR) magnitude in male mice. We further show that disrupting Gq-PLC signaling attenuates the HTR and a threshold level of Gq activation is required to induce psychedelic-like effects, consistent with the fact that certain 5-HT2A partial agonists (e.g., lisuride) are non-psychedelic. Understanding the role of 5-HT2A Gq-efficacy in psychedelic-like psychopharmacology permits rational development of non-psychedelic 5-HT2A agonists. We also demonstrate that β-arrestin-biased 5-HT2A receptor agonists block psychedelic effects and induce receptor downregulation and tachyphylaxis. Overall, 5-HT2A receptor Gq-signaling can be fine-tuned to generate ligands distinct from classical psychedelics.
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Affiliation(s)
- Jason Wallach
- Department of Pharmaceutical Sciences, Saint Joseph's University, Philadelphia, PA, 19104, USA.
| | - Andrew B Cao
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Maggie M Calkins
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Andrew J Heim
- Department of Chemistry, Saint Joseph's University, Philadelphia, PA, 19104, USA
- Chemical Computing Group ULC, 910-1010 Sherbrooke W, Montréal, QC, H3A 2R7, Canada
| | - Janelle K Lanham
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Emma M Bonniwell
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Joseph J Hennessey
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Hailey A Bock
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Emilie I Anderson
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | | | - Hamilton Morris
- Department of Pharmaceutical Sciences, Saint Joseph's University, Philadelphia, PA, 19104, USA
| | - Robbin de Klein
- Research Service, VA San Diego Healthcare System, San Diego, CA, 92161, USA
| | - Adam K Klein
- Department of Psychiatry, University of California San Diego, La Jolla, CA, 92093, USA
- Gilgamesh Pharmaceuticals, New York, NY, 10003, USA
| | - Bruna Cuccurazzu
- Department of Psychiatry, University of California San Diego, La Jolla, CA, 92093, USA
| | - James Gamrat
- Department of Pharmaceutical Sciences, Saint Joseph's University, Philadelphia, PA, 19104, USA
| | - Tilka Fannana
- Department of Pharmaceutical Sciences, Saint Joseph's University, Philadelphia, PA, 19104, USA
| | - Randy Zauhar
- Department of Chemistry, Saint Joseph's University, Philadelphia, PA, 19104, USA
- Artemis Discovery, LLC, Suite 300, 709 N 2nd Street, Philadelphia, PA, 19123, USA
| | - Adam L Halberstadt
- Research Service, VA San Diego Healthcare System, San Diego, CA, 92161, USA.
- Department of Psychiatry, University of California San Diego, La Jolla, CA, 92093, USA.
- Center for Psychedelic Research, University of California San Diego, La Jolla, CA, 92093, USA.
| | - John D McCorvy
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI, 53226, USA.
- Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, WI, 53226, USA.
- Cancer Center, Medical College of Wisconsin, Milwaukee, WI, 53226, USA.
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10
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Ma H, Gu L, Wang Y, Xu Q, Zhang Y, Shao W, Yu Q, Lian X, Liu L, Gu J, Ji N, Liu X, Nagayasu K, Zhang H. The States of Different 5-HT Receptors Located in the Dorsal Raphe Nucleus Are Crucial for Regulating the Awakening During General Anesthesia. Mol Neurobiol 2023; 60:6931-6948. [PMID: 37516665 DOI: 10.1007/s12035-023-03519-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 07/11/2023] [Indexed: 07/31/2023]
Abstract
General anesthesia is widely used in various clinical practices due to its ability to cause loss of consciousness. However, the exact mechanism of anesthesia-induced unconsciousness remains unclear. It is generally thought that arousal-related brain nuclei are involved. 5-Hydroxytryptamine (5-HT) is closely associated with sleep arousal. Here, we explore the role of the 5-HT system in anesthetic awakening through pharmacological interventions and optogenetic techniques. Our data showed that exogenous administration of 5-hydroxytryptophan (5-HTP) and optogenetic activation of 5-HT neurons in the dorsal raphe nucleus (DR) could significantly shorten the emergence time of sevoflurane anesthesia in mice, suggesting that regulation of the 5-HT system using both endogenous and exogenous approaches could mediate delayed emergence. In addition, we first discovered that the different 5-HT receptors located in the DR, known as 5-HT autoreceptors, are essential for the regulation of general anesthetic awakening, with 5-HT1A and 5-HT2A/C receptors playing a regulatory role. These results can provide a reliable theoretical basis as well as potential targets for clinical intervention to prevent delayed emergence and some postoperative risks.
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Affiliation(s)
- HaiXiang Ma
- Department of Anesthesiology, The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, 310006, China
- Medical College of Jining Medical University, Ningji, 272067, Shandong, China
| | - LeYuan Gu
- Department of Anesthesiology, The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, 310006, China
| | - YuLing Wang
- Department of Anesthesiology, The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, 310006, China
| | - Qing Xu
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
| | - Yuanli Zhang
- Department of Anesthesiology, The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, 310006, China
| | - WeiHui Shao
- Department of Anesthesiology, The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, 310006, China
| | - Qian Yu
- Department of Anesthesiology, The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, 310006, China
| | - XiTing Lian
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
| | - Lu Liu
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
| | - JiaXuan Gu
- Department of Anesthesiology, The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, 310006, China
| | - Na Ji
- Department of Anesthesia, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
| | - XiaoLing Liu
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
| | - Kazuki Nagayasu
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, 606-8501, Japan
| | - HongHai Zhang
- Department of Anesthesiology, The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, 310006, China.
- Medical College of Jining Medical University, Ningji, 272067, Shandong, China.
- Department of Anesthesiology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China.
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, 310006, China.
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11
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Cameron LP, Benetatos J, Lewis V, Bonniwell EM, Jaster AM, Moliner R, Castrén E, McCorvy JD, Palner M, Aguilar-Valles A. Beyond the 5-HT 2A Receptor: Classic and Nonclassic Targets in Psychedelic Drug Action. J Neurosci 2023; 43:7472-7482. [PMID: 37940583 PMCID: PMC10634557 DOI: 10.1523/jneurosci.1384-23.2023] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/13/2023] [Accepted: 08/18/2023] [Indexed: 11/10/2023] Open
Abstract
Serotonergic psychedelics, such as psilocybin and LSD, have garnered significant attention in recent years for their potential therapeutic effects and unique mechanisms of action. These compounds exert their primary effects through activating serotonin 5-HT2A receptors, found predominantly in cortical regions. By interacting with these receptors, serotonergic psychedelics induce alterations in perception, cognition, and emotions, leading to the characteristic psychedelic experience. One of the most crucial aspects of serotonergic psychedelics is their ability to promote neuroplasticity, the formation of new neural connections, and rewire neuronal networks. This neuroplasticity is believed to underlie their therapeutic potential for various mental health conditions, including depression, anxiety, and substance use disorders. In this mini-review, we will discuss how the 5-HT2A receptor activation is just one facet of the complex mechanisms of action of serotonergic psychedelics. They also interact with other serotonin receptor subtypes, such as 5-HT1A and 5-HT2C receptors, and with neurotrophin receptors (e.g., tropomyosin receptor kinase B). These interactions contribute to the complexity of their effects on perception, mood, and cognition. Moreover, as psychedelic research advances, there is an increasing interest in developing nonhallucinogenic derivatives of these drugs to create safer and more targeted medications for psychiatric disorders by removing the hallucinogenic properties while retaining the potential therapeutic benefits. These nonhallucinogenic derivatives would offer patients therapeutic advantages without the intense psychedelic experience, potentially reducing the risks of adverse reactions. Finally, we discuss the potential of psychedelics as substrates for post-translational modification of proteins as part of their mechanism of action.
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Affiliation(s)
- Lindsay P Cameron
- Department of Psychiatry, Stanford University, Palo Alto 94305, California
| | - Joseph Benetatos
- Department of Neurosciences, University of California-San Diego, La Jolla 92093, California
| | - Vern Lewis
- Department of Neuroscience, Carleton University, Ottawa K1S 5B6, Ontario Canada
| | - Emma M Bonniwell
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee 53226, Wisconsin
| | - Alaina M Jaster
- Pharmacology and Toxicology, Physiology and Biophysics, Virginia Commonwealth University, Richmond 23298, Virginia
| | - Rafael Moliner
- Neuroscience Center, HiLIFE and Department of Pharmacology, Faculty of Medicine, University of Helsinki, Helsinki 00014, Finland
| | - Eero Castrén
- Neuroscience Center, HiLIFE and Department of Pharmacology, Faculty of Medicine, University of Helsinki, Helsinki 00014, Finland
| | - John D McCorvy
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee 53226, Wisconsin
| | - Mikael Palner
- Clinical Physiology and Nuclear Medicine, Department Clinical Research, University of Southern Denmark, Odense DK-2100, Denmark
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12
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Kim JH, Kim HK, Son YD, Kim JH. In Vivo Serotonin 5-HT2A Receptor Availability and Its Relationship with Aggression Traits in Healthy Individuals: A Positron Emission Tomography Study with C-11 MDL100907. Int J Mol Sci 2023; 24:15697. [PMID: 37958691 PMCID: PMC10647245 DOI: 10.3390/ijms242115697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 10/26/2023] [Accepted: 10/26/2023] [Indexed: 11/15/2023] Open
Abstract
Serotonergic neurotransmission has been associated with aggression in several psychiatric disorders. Human aggression is a continuum of traits, ranging from normal to pathological phenomena. However, the individual differences in serotonergic neurotransmission and their relationships with aggression traits in healthy individuals remain unclear. In this study, we explored the relationship between 5-HT2A receptor availability in vivo and aggression traits in healthy participants. Thirty-three healthy participants underwent 3-Tesla magnetic resonance imaging and positron emission tomography (PET) with [11C]MDL100907, a selective radioligand for 5-HT2A receptors. To quantify 5-HT2A receptor availability, the binding potential (BPND) was derived using the basis function implementation of the simplified reference tissue model, with the cerebellum as the reference region. The participants' aggression levels were assessed using the Buss-Perry Aggression Questionnaire. The voxel-based correlation analysis with age and sex as covariates revealed that the total aggression score was significantly positively correlated with [11C]MDL100907 BPND in the right middle temporal gyrus (MTG) pole, left fusiform gyrus (FUSI), right parahippocampal gyrus, and right hippocampus. The physical aggression subscale score had significant positive correlations with [11C]MDL100907 BPND in the left olfactory cortex, left orbital superior frontal gyrus (SFG), right anterior cingulate and paracingulate gyri, left orbitomedial SFG, left gyrus rectus, left MTG, left inferior temporal gyrus, and left angular gyrus. The verbal aggression subscale score showed significant positive correlations with [11C]MDL100907 BPND in the bilateral SFG, right medial SFG, left FUSI, and right MTG pole. Overall, our findings suggest the possibility of positive correlations between aggression traits and in vivo 5-HT2A receptor availability in healthy individuals. Future research should incorporate multimodal neuroimaging to investigate the downstream effects of 5-HT2A receptor-mediated signaling and integrate molecular and systems-level information in relation to aggression traits.
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Affiliation(s)
- Jeong-Hee Kim
- Neuroscience Research Institute, Gachon University, Incheon 21565, Republic of Korea
- Biomedical Engineering Research Center, Gachon University, Incheon 21936, Republic of Korea
- Department of Biomedical Engineering, College of IT Convergence, Gachon University, Seongnam-si 13120, Republic of Korea
| | - Hang-Keun Kim
- Neuroscience Research Institute, Gachon University, Incheon 21565, Republic of Korea
- Biomedical Engineering Research Center, Gachon University, Incheon 21936, Republic of Korea
- Department of Biomedical Engineering, College of IT Convergence, Gachon University, Seongnam-si 13120, Republic of Korea
| | - Young-Don Son
- Neuroscience Research Institute, Gachon University, Incheon 21565, Republic of Korea
- Biomedical Engineering Research Center, Gachon University, Incheon 21936, Republic of Korea
- Department of Biomedical Engineering, College of IT Convergence, Gachon University, Seongnam-si 13120, Republic of Korea
| | - Jong-Hoon Kim
- Neuroscience Research Institute, Gachon University, Incheon 21565, Republic of Korea
- Department of Psychiatry, Gachon University College of Medicine, Gil Medical Center, Gachon University, Incheon 21565, Republic of Korea
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13
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Zhu H, Liu X, Wang X, Li Y, Ma F, Tan B, Zhou P, Fu F, Su R. Gβγ subunit inhibitor decreases DOM-induced head twitch response via the PLCβ/IP3/Ca 2+/ERK and cAMP signaling pathways. Eur J Pharmacol 2023; 957:176038. [PMID: 37657742 DOI: 10.1016/j.ejphar.2023.176038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 08/17/2023] [Accepted: 08/30/2023] [Indexed: 09/03/2023]
Abstract
AIMS (-)-2,5-dimethoxy-4-methylamphetamine (DOM) induces the head-twitch response (HTR) primarily by activating the serotonin 5-hydroxytryptamine 2A receptor (5-HT2A receptor) in mice. However, the mechanisms underlying 5-HT2A receptor activation and the HTR remain elusive. Gβγ subunits are a potential treatment target in numerous diseases. The present study investigated the mechanism whereby Gβγ subunits influence DOM-induced HTR. MAIN METHODS The effects of the Gβγ inhibitor 3',4',5',6'-tetrahydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one (gallein) and antagonistic peptide βARKct (β-adrenergic receptor kinase C-terminal fragment) on DOM-induced HTR were studied via an HTR test. The activation of the phospholipase C β (PLCβ)/inositol triphosphate (IP3)/calcium (Ca2+) signaling pathway and extracellular signal-regulated kinase (ERK) following Gβγ subunit inhibition was detected by western blotting, Homogeneous Time-Resolved Fluorescence (HTRF) inositol phosphate (IP1) assay and Fluorometric Imaging Plate Reader (FLIPR) calcium 6 assay. The Gβγ subunit-mediated regulation of cyclic adenosine monophosphate (cAMP) was assessed via a GloSensor™ cAMP assay. KEY FINDINGS The Gβγ subunit inhibitors gallein and βARKct reduced DOM-induced HTR in C57BL/6J mice. Like the 5-HT2A receptor-selective antagonist (R)-[2,3-di(methoxy)phenyl]-[1-[2-(4-fluorophenyl)ethyl]piperidin-4-yl]methanol (M100907), gallein inhibited PLCβ phosphorylation (pPLCβ), IP1 production, Ca2+ transients, ERK1/2 phosphorylation (pERK1/2) and cAMP accumulation induced by DOM in human embryonic kidney (HEK) 293T cells stably or transiently transfected with the human 5-HT2A receptor. Moreover, PLCβ protein inhibitor 1-[6-[[(8R,9S,13S,14S,17S)-3-methoxy-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-17-yl]amino]hexyl]pyrrole-2,5-dione (U73122) (10 nmol/mouse), intracellular Ca2+ blocker 6-[6-[6-[5-acetamido-4,6-dihydroxy-2-(sulfooxymethyl)oxan-3-yl]oxy-2-carboxy-4-hydroxy-5-sulfooxyoxan-3-yl]oxy-2-(hydroxymethyl)-5-(sulfoamino)-4-sulfooxyoxan-3-yl]oxy-3,4-dihydroxy-5-sulfooxyoxane-2-carboxylic acid (heparin) (5 nmol/mouse), L-type Ca2+ channel blocker 3-O-(2-methoxyethyl) 5-O-propan-2-yl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate (nimodipine) (4 mg/kg), mitogen extracellular regulating kinase 1/2 (MEK1/2) inhibitor (Z)-3-amino-3-(4-aminophenyl)sulfanyl-2-[2-(trifluoromethyl)phenyl]prop-2-enenitrile (SL327) (30 mg/kg), and Gαs protein selective antagonist 4,4',4″,4‴-(Carbonylbis-(imino-5,1,3-benzenetriylbis(carbonylimino)))tetrakisbenzene-1,3-disulfonic acid (NF449) (10 nmol/mouse) reduced DOM-induced HTR in C57BL/6J mice. SIGNIFICANCE The Gβγ subunits potentially mediate the HTR after 5-HT2A receptor activation via the PLCβ/IP3/Ca2+/ERK1/2 and cAMP signaling pathways. Inhibitors targeting the Gβγ subunits potentially inhibit the hallucinogenic effects of 5-HT2A receptor agonists.
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Affiliation(s)
- Huili Zhu
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China; School of Pharmacy, Yantai University, Yantai, 264005, China
| | - Xiaoqian Liu
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Xiaoxuan Wang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Yulei Li
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Fang Ma
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Bo Tan
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Peilan Zhou
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China.
| | - Fenghua Fu
- School of Pharmacy, Yantai University, Yantai, 264005, China
| | - Ruibin Su
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China.
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14
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Chavan LN, Voll R, Sanchez MM, Nye JA, Goodman MM. Concise and Scalable Radiosynthesis of (+)-[ 18F]MDL100907 as a Serotonin 5-HT 2A Receptor Antagonist for PET. ACS Chem Neurosci 2023; 14:3694-3703. [PMID: 37748194 PMCID: PMC10557077 DOI: 10.1021/acschemneuro.3c00382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 08/23/2023] [Indexed: 09/27/2023] Open
Abstract
5-Hydroxytryptamine (5-HT2A) receptors play an important role in several psychiatric disorders. In order to investigate the serotonin (5-HT) receptor in vivo, reliable syntheses are required for positron emission tomography (PET) 5-HT radioligands. Owing to the excellent in vivo properties of [18F]MDL100907 for PET, there has been great interest to develop a novel synthetic route for [18F]MDL100907. Here, we report a highly efficient, scalable, and expedient synthesis for [18F]MDL100907. The radiofluorination was performed on a 18F-labeling boron pinacol ester precursor, which is synthesized using the Liebeskind-Srogl cross-coupling reaction as a key step. Our method is practically more suitable to employ late-stage Cu-mediated radiofluorination and facilitate the production of the [18F]MDL100907 radioligand in excellent decay-corrected RCY of 32 ± 10% (n = 7) within 60 min. We prepared [18F]MDL100907 in high molar activity (2.1 Ci/μmol) and compared it to [11C]MDL100907 in the brain of a nonhuman primate.
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Affiliation(s)
- Lahu N. Chavan
- Department
of Radiology and Imaging Science, Emory
University School of Medicine, Atlanta, Georgia 30329, United States
| | - Ronald Voll
- Department
of Radiology and Imaging Science, Emory
University School of Medicine, Atlanta, Georgia 30329, United States
- Department
of Psychiatry and Behavioral Sciences, Emory National Primate Center, Emory University School of Medicine, Atlanta, Georgia 30322, United States
| | - Mar M. Sanchez
- Department
of Psychiatry and Behavioral Sciences, Emory National Primate Center, Emory University School of Medicine, Atlanta, Georgia 30322, United States
| | - Jonathon A. Nye
- Department
of Radiology and Imaging Science, Emory
University School of Medicine, Atlanta, Georgia 30329, United States
- Department
of Psychiatry and Behavioral Sciences, Emory National Primate Center, Emory University School of Medicine, Atlanta, Georgia 30322, United States
| | - Mark M. Goodman
- Department
of Radiology and Imaging Science, Emory
University School of Medicine, Atlanta, Georgia 30329, United States
- Department
of Psychiatry and Behavioral Sciences, Emory National Primate Center, Emory University School of Medicine, Atlanta, Georgia 30322, United States
- Department
of Radiology and Imaging Sciences Wesley
Woods Health Center, 1841 Clifton Rd. NE, 2nd Floor, Atlanta, Georgia 30329, United States
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15
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Chen Y, Sun J, Yang Z, Bi H. Efficacy and safety of negative allosteric modulators of 5-hydroxytryptamine 2A receptors in the treatment of Alzheimer's disease psychosis: A systematic review and meta-analysis. ADV CLIN EXP MED 2023; 32:1089-1098. [PMID: 37166012 DOI: 10.17219/acem/161159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/18/2022] [Accepted: 02/12/2023] [Indexed: 05/12/2023]
Abstract
BACKGROUND Psychosis is a very common feature of Alzheimer's disease (AD) that can emerge as the neurodegenerative disease progresses. The 5-hydroxytryptamine (5-HT2A) receptors are located postsynaptically to serotonergic neurons in the frontal cortex and mediate both excitatory and inhibitory neurotransmissions. However, the effectiveness and tolerance of negative modulators of 5-HT2A receptors in Alzheimer's disease psychosis (ADP) are uncertain. OBJECTIVES To detect the negative modulators of the 5-HT2A receptor as a cure for ADP. MATERIAL AND METHODS The primary outcome indicator was the total Neuropsychiatric Inventory (NPI) score. Other prognostic indicators included Mini-Mental State Examination (MMSE), the Katz Index of Independence in Activities of Daily Living (KATZ), the discontinuation rate, and adverse events. RESULTS Compared to placebo, 5-HT2A inverse agonists significantly reduced the NPI total score, the KATZ and the MMSE score. The pooled odds ratio (OR) was 1.64 (95% confidence interval (95% CI): 1.01-2.65) and the heterogeneity variance was estimated at Tau2 = 0.52 with an I2 value of 90%, a χ2 value of 111.31, p = 0.04, and z-value of 2.01. The risk difference (RD) between the 5-HT2A receptor negative modulators and placebo groups was 0.12 (95% CI: 0.00-0.24) and the heterogeneity was estimated at Tau2 = 0.03, χ2 value of 127.23, degrees of freedom (df) value of 9, I2 value of 93%, z-value of 1.92, and p-value of 0.01 (<0.05). CONCLUSION Our results suggest that negative modulators of 5-HT2A receptors are beneficial and well-tolerated in the treatment of ADP.
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Affiliation(s)
- Yuxiao Chen
- Department of Rehabilitation, Shandong University of Traditional Chinese Medicine Affiliated Hospital, Jinan, China
| | - Jie Sun
- Department of Neurology, Liaocheng Veterans Hospital, China
| | - Zhen Yang
- Department of Movement Sciences, Faculty of Medicine, Katholieke Universiteit Leuven, Belgium
| | - Hongyan Bi
- Department of Rehabilitation, Shandong University of Traditional Chinese Medicine Affiliated Hospital, Jinan, China
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16
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Meana JJ, González-Maeso J. Serotonin 5-HT 2A receptors in schizophrenia: Reflexions on an unfinished story. Eur Neuropsychopharmacol 2023; 74:89-91. [PMID: 37352762 DOI: 10.1016/j.euroneuro.2023.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/22/2023] [Accepted: 05/26/2023] [Indexed: 06/25/2023]
Affiliation(s)
- J Javier Meana
- Department of Pharmacology, University of the Basque Country, UPV/EHU, 48940 Leioa, Bizkaia, Spain; Centro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, Spain; Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Bizkaia, Spain.
| | - Javier González-Maeso
- Department of Physiology and Biophysics, Virginia Commonwealth University School of Medicine, Richmond, VA, 23298, USA
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17
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Wall MB, Harding R, Zafar R, Rabiner EA, Nutt DJ, Erritzoe D. Neuroimaging in psychedelic drug development: past, present, and future. Mol Psychiatry 2023; 28:3573-3580. [PMID: 37759038 PMCID: PMC10730398 DOI: 10.1038/s41380-023-02271-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 09/13/2023] [Indexed: 09/29/2023]
Abstract
Psychedelic therapy (PT) is an emerging paradigm with great transdiagnostic potential for treating psychiatric disorders, including depression, addiction, post-traumatic stress disorder, and potentially others. 'Classic' serotonergic psychedelics, such as psilocybin and lysergic acid diethylamide (LSD), which have a key locus of action at the 5-HT2A receptor, form the main focus of this movement, but substances including ketamine, 3,4-Methylenedioxymethamphetamine (MDMA) and ibogaine also hold promise. The modern phase of development of these treatment modalities in the early 21st century has occurred concurrently with the wider use of advanced human neuroscientific research methods; principally neuroimaging. This can potentially enable assessment of drug and therapy brain effects with greater precision and quantification than any previous novel development in psychiatric pharmacology. We outline the major trends in existing data and suggest the modern development of PT has benefitted greatly from the use of neuroimaging. Important gaps in existing knowledge are identified, namely: the relationship between acute drug effects and longer-term (clinically-relevant) effects, the precise characterisation of effects at the 5-HT2A receptor and relationships with functional/clinical effects, and the possible impact of these compounds on neuroplasticity. A road-map for future research is laid out, outlining clinical studies which will directly address these three questions, principally using combined Positron Emission Tomography (PET) and Magnetic Resonance Imaging (MRI) methods, plus other adjunct techniques. Multimodal (PET/MRI) studies using modern PET techniques such as the 5-HT2A-selective ligand [11 C]Cimbi-36 (and other ligands sensitive to neuroplasticity changes) alongside MRI measures of brain function would provide a 'molecular-functional-clinical bridge' in understanding. Such results would help to resolve some of these questions and provide a firmer foundation for the ongoing development of PT.
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Affiliation(s)
- Matthew B Wall
- Invicro, London, UK.
- Faculty of Medicine, Imperial College London, London, UK.
- Centre for Psychedelic research and Neuropsychopharmacology, Imperial College London, London, UK.
| | - Rebecca Harding
- Clinical Psychopharmacology Unit, Faculty of Brain Sciences, University College London, London, UK
| | - Rayyan Zafar
- Faculty of Medicine, Imperial College London, London, UK
- Centre for Psychedelic research and Neuropsychopharmacology, Imperial College London, London, UK
| | | | - David J Nutt
- Faculty of Medicine, Imperial College London, London, UK
- Centre for Psychedelic research and Neuropsychopharmacology, Imperial College London, London, UK
| | - David Erritzoe
- Faculty of Medicine, Imperial College London, London, UK
- Centre for Psychedelic research and Neuropsychopharmacology, Imperial College London, London, UK
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18
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Yao R, Jensen AA, Bryce-Rogers HP, Schultz-Knudsen K, Zhou L, Hovendal NP, Pedersen H, Kubus M, Ulven T, Laraia L. Identification of 5-HT2 Serotonin Receptor Modulators through the Synthesis of a Diverse, Tropane- and Quinuclidine-alkaloid-Inspired Compound Library. J Med Chem 2023; 66:11536-11554. [PMID: 37566000 DOI: 10.1021/acs.jmedchem.3c01059] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
The recombination of natural product (NP) fragments in unprecedented ways has emerged as an important strategy for bioactive compound discovery. In this context, we propose that privileged primary fragments predicted to be enriched in activity against a specific target class can be coupled to diverse secondary fragments to engineer selectivity among closely related targets. Here, we report the synthesis of an alkaloid-inspired compound library enriched in spirocyclic ring fusions, comprising 58 compounds from 12 tropane- or quinuclidine-containing scaffolds, all of which can be considered pseudo-NPs. The library displays excellent predicted drug-like properties including high Fsp3 content and Lipinski's rule-of-five compliance. Targeted screening against selected members of the serotonin and dopamine G protein-coupled receptor family led to the identification of several hits that displayed significant agonist or antagonist activity against 5-HT2A and/or 5-HT2C, and subsequent optimization of one of these delivered a lead dual 5-HT2B/C antagonist with a highly promising selectivity profile.
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Affiliation(s)
- Ruwei Yao
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800 Kgs Lyngby, Denmark
| | - Anders A Jensen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Hogan P Bryce-Rogers
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800 Kgs Lyngby, Denmark
| | - Katrine Schultz-Knudsen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Libin Zhou
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Nicklas P Hovendal
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800 Kgs Lyngby, Denmark
| | - Henrik Pedersen
- Medicinal Chemistry, H. Lundbeck A/S, Ottiliavej 9, 2500 Valby, Denmark
| | - Mariusz Kubus
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800 Kgs Lyngby, Denmark
| | - Trond Ulven
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Luca Laraia
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800 Kgs Lyngby, Denmark
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19
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Pottie E, Poulie CBM, Simon IA, Harpsøe K, D’Andrea L, Komarov IV, Gloriam DE, Jensen AA, Kristensen JL, Stove CP. Structure-Activity Assessment and In-Depth Analysis of Biased Agonism in a Set of Phenylalkylamine 5-HT 2A Receptor Agonists. ACS Chem Neurosci 2023; 14:2727-2742. [PMID: 37474114 PMCID: PMC10401645 DOI: 10.1021/acschemneuro.3c00267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 06/09/2023] [Indexed: 07/22/2023] Open
Abstract
Serotonergic psychedelics are described to have activation of the serotonin 2A receptor (5-HT2A) as their main pharmacological action. Despite their relevance, the molecular mechanisms underlying the psychedelic effects induced by certain 5-HT2A agonists remain elusive. One of the proposed hypotheses is the occurrence of biased agonism, defined as the preferential activation of certain signaling pathways over others. This study comparatively monitored the efficiency of a diverse panel of 4-position-substituted (and N-benzyl-derived) phenylalkylamines to induce recruitment of β-arrestin2 (βarr2) or miniGαq to the 5-HT2A, allowing us to assess structure-activity relationships and biased agonism. All test compounds exhibited agonist properties with a relatively large range of both EC50 and Emax values. Interestingly, the lipophilicity of the 2C-X phenethylamines was correlated with their efficacy in both assays but yielded a stronger correlation in the miniGαq- than in the βarr2-assay. Molecular docking suggested that accommodation of the 4-substituent of the 2C-X analogues in a hydrophobic pocket between transmembrane helices 4 and 5 of 5-HT2A may contribute to this differential effect. Aside from previously used standard conditions (lysergic acid diethylamide (LSD) as a reference agonist and a 2 h activation profile to assess a compound's activity), serotonin was included as a second reference agonist, and the compounds' activities were also assessed using the first 30 min of the activation profile. Under all assessed circumstances, the qualitative structure-activity relationships remained unchanged. Furthermore, the use of two reference agonists allowed for the estimation of both "benchmark bias" (relative to LSD) and "physiology bias" (relative to serotonin).
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Affiliation(s)
- Eline Pottie
- Laboratory
of Toxicology, Department of Bioanalysis, Faculty of Pharmaceutical
Sciences, Ghent University, Campus Heymans, Ottergemsesteenweg
460, B-9000 Ghent, Belgium
| | - Christian B. M. Poulie
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Icaro A. Simon
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Kasper Harpsøe
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Laura D’Andrea
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | | | - David E. Gloriam
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Anders A. Jensen
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Jesper L. Kristensen
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Christophe P. Stove
- Laboratory
of Toxicology, Department of Bioanalysis, Faculty of Pharmaceutical
Sciences, Ghent University, Campus Heymans, Ottergemsesteenweg
460, B-9000 Ghent, Belgium
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20
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Takaya K, Asou T, Kishi K. Development of a Novel Senolysis Approach Targeting the Senescent Fibroblast Marker HTR2A via Antibody-Dependent Cellular Cytotoxicity. Rejuvenation Res 2023; 26:147-158. [PMID: 37345689 DOI: 10.1089/rej.2023.0020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/23/2023] Open
Abstract
Abnormal remodeling of collagen and extracellular matrix caused by the accumulation of senescent fibroblasts in the dermis is the most likely cause of skin aging. Therefore, the application of "senolysis," in which only senescent cells are cleared from the body, has a potential in the development of antiaging treatments for skin. However, markers that label senescent fibroblasts only reflect the state of senescence, and it is important to develop markers as therapeutic targets to aid senolysis application. We investigated the potential of serotonin 2A receptor (HTR2A), which is involved in melanin production in response to ultraviolet light, as a senescent cell marker. The results showed that HTR2A is upregulated in aging dermal fibroblasts but is expressed at low levels in proliferating young cells. Flow cytometry demonstrated the presence of many HTR2A-positive cells in the aging cell population and few in the young cells. Furthermore, antibody-dependent cytotoxicity assays revealed that HTR2A preferentially sensitizes senescent fibroblasts and specifically damages only senescent cells by natural killer cells that recognize it. In conclusion, selective labeling of the novel senescent cell marker, HTR2A, could preferentially eliminate senescent cells and may contribute to the future development of novel skin senolysis approaches.
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Affiliation(s)
- Kento Takaya
- Department of Plastic and Reconstructive Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Toru Asou
- Department of Plastic and Reconstructive Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Kazuo Kishi
- Department of Plastic and Reconstructive Surgery, Keio University School of Medicine, Tokyo, Japan
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Lam YTH, Hoppe J, Dang QN, Porzel A, Soboleva A, Brandt W, Rennert R, Hussain H, Davari MD, Wessjohann L, Arnold N. Purpurascenines A-C, Azepino-Indole Alkaloids from Cortinarius purpurascens: Isolation, Biosynthesis, and Activity Studies on the 5-HT 2A Receptor. J Nat Prod 2023; 86:1373-1384. [PMID: 37306303 DOI: 10.1021/acs.jnatprod.2c00716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Three previously undescribed azepino-indole alkaloids, named purpurascenines A-C (1-3), together with the new-to-nature 7-hydroxytryptophan (4) as well as two known compounds, adenosine (5) and riboflavin (6), were isolated from fruiting bodies of Cortinarius purpurascens Fr. (Cortinariaceae). The structures of 1-3 were elucidated based on spectroscopic analyses and ECD calculations. Furthermore, the biosynthesis of purpurascenine A (1) was investigated by in vivo experiments using 13C-labeled sodium pyruvate, alanine, and sodium acetate incubated with fruiting bodies of C. purpurascens. The incorporation of 13C into 1 was analyzed using 1D NMR and HRESIMS methods. With [3-13C]-pyruvate, a dramatic enrichment of 13C was observed, and hence a biosynthetic route via a direct Pictet-Spengler reaction between α-keto acids and 7-hydroxytryptophan (4) is suggested for the biosynthesis of purpurascenines A-C (1-3). Compound 1 exhibits no antiproliferative or cytotoxic effects against human prostate (PC-3), colorectal (HCT-116), and breast (MCF-7) cancer cells. An in silico docking study confirmed the hypothesis that purpurascenine A (1) could bind to the 5-HT2A serotonin receptor's active site. A new functional 5-HT2A receptor activation assay showed no functional agonistic but some antagonistic effects of 1 against the 5-HT-dependent 5-HT2A activation and likely antagonistic effects on putative constitutive activity of the 5-HT2A receptor.
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Affiliation(s)
- Yen T H Lam
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
- Department of Organic Chemistry, Faculty of Chemistry, Hanoi National University of Education, 136 Xuanthuy, Caugiay, Hanoi 100000, Vietnam
| | - Jana Hoppe
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Quang N Dang
- Department of Organic Chemistry, Faculty of Chemistry, Hanoi National University of Education, 136 Xuanthuy, Caugiay, Hanoi 100000, Vietnam
| | - Andrea Porzel
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Alena Soboleva
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Wolfgang Brandt
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Robert Rennert
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Hidayat Hussain
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Mehdi D Davari
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Ludger Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Norbert Arnold
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
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22
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Zhu X, Yang Y, Du G, Liu B, Yu X, Ye L, Mao Y, Wang H, Tian J. Non-clinical pharmacology and toxicology studies of LPM6690061, a novel 5-hydroxytryptamine (5-HT) 2A receptor inverse agonist. Food Chem Toxicol 2023; 176:113800. [PMID: 37100235 DOI: 10.1016/j.fct.2023.113800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/25/2023] [Accepted: 04/22/2023] [Indexed: 04/28/2023]
Abstract
LPM6690061 is a novel compound with 5-HT2A receptor antagonist and inverse agonist activities. To support the clinical trial and marketing application of LPM6690061, a series of pharmacology and toxicology studies have been conducted. In vitro and in vivo pharmacology studies showed that LPM6690061 had high inverse agonism and antagonism activities against human 5-HT2A receptors, and demonstrated significant antipsychotic-like effects in two rat models: the DOI-induced head-twitch model and the MK-801-induced hyperactivity model, which was more effective than the control drug pimavanserin. LPM6690061 did not have detectable side effects on the neurobehavioral activities and respiratory function in rats, or on the ECG or blood pressure in dogs at the doses of 2 and 6 mg/kg. The half maximal inhibitory concentration (IC50) of LPM6690061 for inhibiting hERG current was 1.02 μM. Three in vivo toxicology studies were conducted. In the single dose toxicity study in rats and dogs, the maximum tolerated dose of LPM6690061 was 100 mg/kg. In the 4-week repeat dose toxicity study in rats, the main detectable toxic reactions of LPM6690061 included moderate artery wall hypertrophy, minimal to mild mixed cell inflammation and increased macrophages in the lung, which generally recovered after a 4-week drug withdrawal period. In the 4-week repeat dose toxicity study in dogs, no detectable toxicity was observed. The doses of no-observed-adverse-effect-level (NOAEL) in rats and dogs were 10 mg/kg and 20 mg/kg, respectively. In conclusion, both in vitro and in vivo pharmacological and toxicological studies showed that LPM6690061 was a safe and efficacious 5-HT2A receptor antagonist/inverse agonist which supports the clinical development as a novel antipsychotic drug.
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Affiliation(s)
- Xiaoyin Zhu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, China; State Key Laboratory of Long-acting and Targeting Drug Delivery System, Shandong Luye Pharmaceutical Co. Ltd., Yantai, China
| | - Yue Yang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, China
| | - Guangying Du
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, China
| | - Bin Liu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, China
| | - Xin Yu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, China
| | - Liang Ye
- School of Public Health and Management, Binzhou Medical University, Yantai, China
| | - Yutong Mao
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, China
| | - Hongbo Wang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, China
| | - Jingwei Tian
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, China; State Key Laboratory of Long-acting and Targeting Drug Delivery System, Shandong Luye Pharmaceutical Co. Ltd., Yantai, China.
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23
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Li K, Liu X, Zhang M, Su R. Effects of Ketanserin, M100907 and Olanzapine on hallucinogenic like action induced by 2,5-dimethoxy-4-methylamphetamine. Behav Pharmacol 2023; 34:92-100. [PMID: 36752335 DOI: 10.1097/fbp.0000000000000693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
2,5-dimethoxy-4-methylamphetamine (DOM) is a kind of hallucinogen of phenylalkylamine. Psychedelic effects mainly include audiovisual synesthesia, complex imagery, disembodiment etc. that can impair control and cognition leading to adverse consequences such as suicide. By now, there are no specific drugs regarding the management of classic hallucinogen use clinically. We evaluated the effects of three 5-HT 2A receptor antagonists ketanseirn, M100907 and olanzapine on hallucination-like behavior in therapeutic and preventive administration with male C57BL/6J mice. Two models were used to evaluate the therapeutic potential of antagonists, one is head-twitch response (HTR) and the other is locomotion. Effects of ketanserin, M100907 and olanzapine on DOM-induced HTR were studied in preventive and therapeutic administration, respectively. In the preventive administration, the ID 50 values of ketanseirn, M100907 and olanzapine were 0.4 mg/kg, 0.005 mg/kg and 0.25 mg/kg. In the therapeutic administration, the ID 50 values of ketanseirn, M100907 and olanzapine were 0.04 mg/kg, 0.005 mg/kg and 0.03 mg/kg. Secondly, locomotor activity induced by DOM was performed to further evaluate the efficacy of three compounds. In locomotion, M100907(0.005 mg/kg) whenever in preventive or therapeutic administration, reduced the increase of movement distance induced by DOM. Although ketanserin (0.4 mg/kg) in the preventive administration also decreased the movement distance induced by DOM, it was alone administrated to influence the locomotor activity. Through HTR and locomotion, we compared the efficacy and latent side effects of ketanserin, M100907 and olanzapine against hallucinogenic like action induced by DOM. Our study provided additional experimental evidence on specific therapeutic drugs against hallucinogenic behavior induce by representative hallucinogen DOM.
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Affiliation(s)
- Kaixi Li
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing
- Shihezi University College of Pharmacy/Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education, Shihezi, Department of Pharmacy, Xinjiang, China
| | - Xiaoyan Liu
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing
| | - Mei Zhang
- Shihezi University College of Pharmacy/Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education, Shihezi, Department of Pharmacy, Xinjiang, China
| | - Ruibin Su
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing
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24
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Ostrowska K, Leśniak A, Gryczka W, Dobrzycki Ł, Bujalska-Zadrożny M, Trzaskowski B. New Piperazine Derivatives of 6-Acetyl-7-hydroxy-4-methylcoumarin as 5-HT 1A Receptor Agents. Int J Mol Sci 2023; 24:ijms24032779. [PMID: 36769117 PMCID: PMC9917830 DOI: 10.3390/ijms24032779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 01/24/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023] Open
Abstract
A series of 15 new derivatives of 6-acetyl-7-hydroxy-4-methylcoumarin containing a piperazine group were designed with the help of computational methods and were synthesized to study their affinity for the serotonin 5-HT1A and 5-HT2A receptors. Among them, 6-acetyl-7-{4-[4-(3-bromophenyl)piperazin-1-yl]butoxy}-4-methylchromen-2-one (4) and 6-acetyl-7-{4-[4-(2-chlorophenyl)piperazin-1-yl]butoxy}-4-methylchromen-2-one (7) exhibited excellent activity for 5-HT1A receptors with Ki values 0.78 (0.4-1.4) nM and 0.57 (0.2-1.3) nM, respectively, comparable to the Ki values of 8-OH-DPAT (0.25 (0.097-0.66) nM). The equilibrium dissociation constant values of the tested compounds showed differential intrinsic activities of the agonist and antagonist modes.
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Affiliation(s)
- Kinga Ostrowska
- Department of Organic and Physical Chemistry, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Str., 02-097 Warsaw, Poland
| | - Anna Leśniak
- Centre for Preclinical Research and Technology, Department of Pharmacodynamics, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Str., 02-097 Warsaw, Poland
| | - Weronika Gryczka
- Department of Organic and Physical Chemistry, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Str., 02-097 Warsaw, Poland
| | - Łukasz Dobrzycki
- Crystallochemistry Laboratory, Chemistry Department, Warsaw University, 1 Pasteura Str., 02-093 Warsaw, Poland
| | - Magdalena Bujalska-Zadrożny
- Centre for Preclinical Research and Technology, Department of Pharmacodynamics, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Str., 02-097 Warsaw, Poland
| | - Bartosz Trzaskowski
- Centre of New Technologies, University of Warsaw, 2C Banacha Str., 02-097 Warsaw, Poland
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Kamadar JH, Kumari DR, Kapadiya KM. Recent Studies on Serotonin 5-HT 2A Receptor Antagonists in Medicinal Chemistry: A Last Decades Survey. Mini Rev Med Chem 2023; 23:1859-1870. [PMID: 37157202 DOI: 10.2174/1389557523666230508162439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 12/17/2022] [Accepted: 01/04/2023] [Indexed: 05/10/2023]
Abstract
In the last decades, much attention has been paid to the functioning of receptors to understand better how they work with various chemical motifs. Among different families, G-proteincoupled receptor (GPCR) families have drawn much attention in the twenty-first century. They are the most prominent signal transducer across the cell membrane, comprising thousand-odd proteins. One of the members of GPCRs is the serotonin 2A (5-HT2A) receptor, which has been associated with complex etiological mental illnesses. In this survey, we collected data on 5-HT2A, i.e., the role of 5- HT2A receptors in human and animal analogy, various binding site functionalities, advanced effects, and synthetic aspects.
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Affiliation(s)
- Jignesh H Kamadar
- Department of Microbiology, School of Science, RK University, Rajkot, Gujarat, 360020, India
| | - D Roza Kumari
- Department of Chemistry, Bio-Research and Characterization Centre, School of Science, RK University, Rajkot, Gujarat, 360020, India
| | - Khushal M Kapadiya
- Department of Chemistry, Bio-Research and Characterization Centre, School of Science, RK University, Rajkot, Gujarat, 360020, India
- School of Chemistry, Cardiff University, Cardiff, Wales, CF10 3AT, UK
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Halberstadt AL, Luethi D, Hoener MC, Trachsel D, Brandt SD, Liechti ME. Use of the head-twitch response to investigate the structure-activity relationships of 4-thio-substituted 2,5-dimethoxyphenylalkylamines. Psychopharmacology (Berl) 2023; 240:115-126. [PMID: 36477925 PMCID: PMC9816194 DOI: 10.1007/s00213-022-06279-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 11/10/2022] [Indexed: 12/12/2022]
Abstract
RATIONALE 4-Thio-substituted phenylalkylamines such as 2,5-dimethoxy-4-ethylthiophenethylamine (2C-T-2) and 2,5-dimethoxy-4-n-propylthiophenethylamine (2C-T-7) produce psychedelic effects in humans and have been distributed as recreational drugs. OBJECTIVES The present studies were conducted to examine the structure-activity relationships (SAR) of a series of 4-thio-substituted phenylalkylamines using the head twitch response (HTR), a 5-HT2A receptor-mediated behavior induced by psychedelic drugs in mice. The HTR is commonly used as a behavioral proxy in rodents for human psychedelic effects and can be used to discriminate hallucinogenic and non-hallucinogenic 5-HT2A agonists. METHODS HTR dose-response studies with twelve different 4-thio-substituted phenylalkylamines were conducted in male C57BL/6 J mice. To detect the HTR, head movement was recorded electronically using a magnetometer coil and then head twitches were identified in the recordings using a validated method based on artificial intelligence. RESULTS 2C-T, the parent compound of this series, had relatively low potency in the HTR paradigm, but adding an α-methyl group increased potency fivefold. Potency was also increased when the 4-methylthio group was extended by one to three methylene units. Fluorination of the 4-position alkylthio chain, however, was detrimental for activity, as was the presence of a 4-allylthio substituent versus a propylthio group. 2C-T analogs containing a 4-benzylthio group showed little or no effect in the HTR paradigm, which is consistent with evidence that bulky 4-substituents can dampen agonist efficacy at the 5-HT2A receptor. Binding and functional studies confirmed that the compounds have nanomolar affinity for 5-HT2 receptor subtypes and act as partial agonists at 5-HT2A. CONCLUSIONS In general, there were close parallels between the HTR data and the known SAR governing activity of phenylalkylamines at the 5-HT2A receptor. These findings further support the classification of 2C-T compounds as psychedelic drugs.
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Affiliation(s)
- Adam L Halberstadt
- Department of Psychiatry, University of California San Diego, 9500 Gilman Dr, La Jolla, CA, 92093-0804, USA.
- Research Service, VA San Diego Healthcare System, San Diego, CA, USA.
| | - Dino Luethi
- Division of Clinical Pharmacology and Toxicology, Department of Biomedicine and Department of Pharmaceutical Sciences, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Marius C Hoener
- pRED, Roche Innovation Center Basel, Neuroscience Research, F. Hoffmann-La Roche Ltd, Basel, Switzerland
| | | | - Simon D Brandt
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool, UK
| | - Matthias E Liechti
- Division of Clinical Pharmacology and Toxicology, Department of Biomedicine and Department of Pharmaceutical Sciences, University Hospital Basel and University of Basel, Basel, Switzerland
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Maguire DR. Effects of 2,5-Dimethoxy-4-Methylamphetamine (DOM) and 2-Piperazin-1-yl-Quinoline (Quipazine) on Fentanyl Versus Food Choice in Rhesus Monkeys. J Pharmacol Exp Ther 2023; 384:155-162. [PMID: 36272734 PMCID: PMC9827501 DOI: 10.1124/jpet.122.001318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 08/18/2022] [Accepted: 10/03/2022] [Indexed: 11/06/2022] Open
Abstract
There has been increasing interest in the potential therapeutic effects of drugs with agonist properties at serotonin 2A subtype (5-HT2A) receptors (e.g., psychedelics), including treatment of substance use disorders. Studying interactions between 5-HT2A receptor agonists and other drugs is important for understanding potential therapeutic effects as well as adverse interactions. Direct-acting 5-HT2A receptor agonists such as 2,5-dimethoxy-4-methylamphetamine (DOM) and 2-piperazin-1-yl-quinoline (quipazine) enhance some (e.g., antinociceptive) effects of opioids; however, it is unclear whether they alter the abuse-related effects of opioids. This study examined whether DOM and quipazine alter the reinforcing effects of fentanyl in rhesus monkeys (n = 6) responding under a food versus drug choice procedure. Responding on one lever delivered sucrose pellets and responding on the other lever delivered intravenous (i.v.) infusions. In one set of experiments, fentanyl (0.1-3.2 µg/kg/infusion) versus food choice sessions were preceded by noncontingent i.v. pretreatments with DOM (0032-0.32 mg/kg), quipazine (0.32-1.0 mg/kg), naltrexone (0.032 mg/kg), or heroin (0.1 mg/kg). In another set of experiments, fentanyl was available during choice sessions in combination with DOM (0.32-100 µg/kg/infusion) or quipazine (3.2-320 µg/kg/infusion) in varying dose ratios. Naltrexone decreased and heroin increased fentanyl choice, demonstrating sensitivity of responding to pharmacological manipulation. However, whether given as a pretreatment or made available in combination with fentanyl as a mixture, neither DOM nor quipazine significantly altered fentanyl choice. These results suggest that 5-HT2A receptor agonists do not enhance the reinforcing effects of opioids and, thus, will not likely enhance abuse potential. SIGNIFICANCE STATEMENT: Serotonin 2A subtype receptor agonists enhance some (e.g., antinociceptive) effects of opioids, suggesting they could be combined with opioids in some therapeutic contexts such as treating pain. However, it is unclear whether they also enhance adverse effects of opioids, including abuse. Results of this study indicate that serotonin 2A subtype receptor agonists do not reliably enhance opioid self-administration and, thus, are unlikely to enhance the abuse potential of opioids.
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Affiliation(s)
- David R Maguire
- Department of Pharmacology and Addiction Research, Treatment & Training Center of Excellence, University of Texas Health Science Center at San Antonio, San Antonio, Texas
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Jiang K, Liu X, Su R. Contrasting effects of DOI and lisuride on impulsive decision-making in delay discounting task. Psychopharmacology (Berl) 2022; 239:3551-3565. [PMID: 36107207 DOI: 10.1007/s00213-022-06229-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 08/28/2022] [Indexed: 11/25/2022]
Abstract
RATIONALE The 5-HT2A receptor is the major target of classic hallucinogens. Both DOI (2,5-dimethoxy-4-iodoamphetamine) and lisuride act at 5-HT2A receptors, and lisuride shares comparable affinity with DOI and acts as a partial agonist at 5-HT2A receptors. However, not like DOI, lisuride lacks hallucinogenic properties. Impulsive decision-making refers to the preference for an immediate small reinforcer (SR) over a delayed large reinforcer (LR). OBJECTIVES The current study aims to compare the effects of DOI and lisuride on impulsive decision-making and further to investigate the possible receptor mechanisms responsible for the actions of the two drugs. METHODS Impulsive decision-making was evaluated in male Sprague-Dawley rats by the percentage of choice for the LR in delay discounting task (DDT). Delay to the LR changed in an ascending order (0, 4, 8, 16, and 32 s) across one session. RESULTS DOI (0.5 and 1.0 mg/kg) increased impulsive decision-making, and the effects of DOI (1.0 mg/kg) were blocked by the 5-HT2A receptor antagonist ketanserin (1.0 mg/kg) rather than the 5-HT2C receptor antagonist SB-242084 (1.0 mg/kg). Contrarily, lisuride (0.1, 0.3, and 0.5 mg/kg) decreased impulsive decision-making. The effects of lisuride (0.3 mg/kg) were not antagonized by ketanserin (1.0 mg/kg), selective 5-HT1A antagonist WAY-100635 (1.0 mg/kg), or selective dopamine D4 receptor antagonist L-745870 (1.0 mg/kg) but were attenuated by the selective dopamine D2/D3 receptor antagonist tiapride (40 mg/kg). CONCLUSIONS DOI and lisuride have contrasting effects on impulsive decision-making via distinct receptors. DOI-induced increase of impulsivity is mediated by the 5-HT2A receptor, while lisuride-induced inhibition of impulsivity is regulated by the dopamine D2/D3 receptor.
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Affiliation(s)
- Kaili Jiang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Xiaoyan Liu
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China.
| | - Ruibin Su
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Key Laboratory of Neuropsychopharmacology, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China.
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de la Fuente Revenga M, Jaster AM, McGinn J, Silva G, Saha S, González-Maeso J. Tolerance and Cross-Tolerance among Psychedelic and Nonpsychedelic 5-HT 2A Receptor Agonists in Mice. ACS Chem Neurosci 2022; 13:2436-2448. [PMID: 35900876 PMCID: PMC10411500 DOI: 10.1021/acschemneuro.2c00170] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Classical psychedelics represent a subgroup of serotonergic psychoactive substances characterized by their distinct subjective effects on the human psyche. Another unique attribute of this drug class is that such effects become less apparent after repeated exposure within a short time span. The classification of psychedelics as a subgroup within the serotonergic drug family and the tolerance to their effects are replicated by the murine head twitch response (HTR) behavioral paradigm. Here, we aimed to assess tolerance and cross-tolerance to HTR elicited by psychedelic and nonpsychedelic serotonin 2A receptor (5-HT2AR) agonists in mice. We show that repeated (4 days) administration of the psychedelic 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI) induced a progressive decrease in HTR behavior. Tolerance to DOI-induced HTR was also observed 24 h after a single administration of this psychedelic. Pretreatment with the 5-HT2AR antagonist M100907 reduced not only the acute manifestation of DOI-induced HTR, but also the development of tolerance to HTR. Additionally, cross-tolerance became apparent between the psychedelics DOI and lysergic acid diethylamide (LSD), whereas repeated administration of the nonpsychedelic 5-HT2AR agonist lisuride did not affect the ability of these two psychedelics to induce HTR. At the molecular level, DOI administration led to down-regulation of 5-HT2AR density in mouse frontal cortex membrane preparations. However, development of tolerance to the effect of DOI on HTR remained unchanged in β-arrestin-2 knockout mice. Together, these data suggest that tolerance to HTR induced by psychedelics involves activation of the 5-HT2AR, is not observable upon repeated administration of nonpsychedelic 5-HT2AR agonists, and occurs via a signaling mechanism independent of β-arrestin-2.
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Affiliation(s)
- Mario de la Fuente Revenga
- Department of Physiology & Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
- Virginia Institute of Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, Virginia 23298, United States
| | - Alaina M Jaster
- Department of Physiology & Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
- Department of Pharmacology & Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - John McGinn
- Department of Physiology & Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - Gabriella Silva
- Department of Physiology & Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - Somdatta Saha
- Department of Physiology & Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - Javier González-Maeso
- Department of Physiology & Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
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Serra YA, Barros-Santos T, Anjos-Santos A, Kisaki ND, Jovita-Farias C, Leite JPC, Santana MCE, Coimbra JPSA, de Jesus NMS, Sulima A, Barbosa PCR, Malpezzi-Marinho ELA, Rice KC, Oliveira-Lima AJ, Berro LF, Marinho EAV. Role of 5-HT 2A receptors in the effects of ayahuasca on ethanol self-administration using a two-bottle choice paradigm in male mice. Psychopharmacology (Berl) 2022; 239:1679-1687. [PMID: 35253069 PMCID: PMC10750423 DOI: 10.1007/s00213-022-06104-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 02/23/2022] [Indexed: 01/21/2023]
Abstract
RATIONALE Ayahuasca has been proposed as a potential treatment of alcohol (ethanol) use disorder (AUD). The serotonin 5-HT2A receptor agonist N,N-dimethyltryptamine (DMT) is the main psychoactive component of ayahuasca, suggesting that its therapeutic effects may be mediated by 5-HT2A receptors. OBJECTIVES The aim of the present study was to investigate the effects of ayahuasca on the expression of ethanol self-administration using a two-bottle choice procedure and the role of 5-HT2A receptors in those effects. METHODS Male mice had intermittent access to ethanol (10% v/v) in a two-bottle choice procedure for 30 days. Animals were then submitted to 3 treatment phases, each followed by ethanol re-exposure tests. During the treatment phase, every 3 days, animals received i.p. injections of either vehicle or the 5-HT2A receptor antagonist M100907 (M100, 1 mg/kg) followed by an i.g. (gavage) administration of vehicle or ayahuasca (100 mg/kg) and were exposed to the self-administration apparatus with no ethanol availability. During re-exposure tests, animals were submitted to the same conditions as during acquisition, with no treatments prior to those sessions. RESULTS Treatment with ayahuasca blocked the expression of ethanol self-administration, decreasing ethanol intake and preference during re-exposure tests. Pretreatment with M100 blocked the effects of ayahuasca on ethanol drinking without significantly attenuating ethanol self-administration. CONCLUSIONS Treatment with ayahuasca during alcohol abstinence blocked the expression of alcohol self-administration in mice, and 5-HT2A receptor activation is critical for those effects to emerge. Our findings support a potential for ayahuasca and other 5-HT2A receptor agonists as adjunctive pharmacotherapies for the treatment of AUD.
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Affiliation(s)
- Yasmim A Serra
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, Ilhéus, BA, 45662-0, Brazil
| | - Thaísa Barros-Santos
- Department of Biological Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
| | - Alexia Anjos-Santos
- Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch, National Institute On Drug Abuse and the National Institute On Alcohol Abuse and Alcoholism, Bethesda, MD, USA
| | - Natali D Kisaki
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, Ilhéus, BA, 45662-0, Brazil
| | - Caio Jovita-Farias
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, Ilhéus, BA, 45662-0, Brazil
| | - João P C Leite
- Department of Biological Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
| | - Maria C E Santana
- Department of Biological Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
| | - João P S A Coimbra
- Department of Biological Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
| | - Nailton M S de Jesus
- Department of Biological Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
| | - Agnieszka Sulima
- Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch, National Institute On Drug Abuse and the National Institute On Alcohol Abuse and Alcoholism, Bethesda, MD, USA
| | - Paulo C R Barbosa
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, Ilhéus, BA, 45662-0, Brazil
| | | | - Kenner C Rice
- Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch, National Institute On Drug Abuse and the National Institute On Alcohol Abuse and Alcoholism, Bethesda, MD, USA
| | - Alexandre J Oliveira-Lima
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, Ilhéus, BA, 45662-0, Brazil
| | - Laís F Berro
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, Ilhéus, BA, 45662-0, Brazil.
- Department of Psychiatry and Human Behavior, Center for Innovation and Discovery in Addictions, University of Mississippi Medical Center, 2500 N State St, Jackson, MS, 39216, USA.
| | - Eduardo A V Marinho
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, Ilhéus, BA, 45662-0, Brazil.
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Abstract
Oxytocin (OT) is recognized as a critical neuropeptide in pain-related disorders. Chronic pain caused by the comorbidity of temporomandibular disorder (TMD) and fibromyalgia syndrome (FMS) is common, but whether OT plays an analgesic role in the comorbidity of TMD and FMS is unknown. Female rats with masseter muscle inflammation combined with 3-day forced swim (FS) stress developed somatic hypersensitivity, which modeled the comorbidity of TMD and FMS. Using this model, the effects of spinal OT administration on mechanical allodynia and thermal hyperalgesia in hindpaws were examined. Furthermore, the protein levels of OT receptors and 5-HT2A receptors in the L4-L5 spinal dorsal horn were analyzed by Western blot. The OT receptor antagonist atosiban and 5-HT2A receptor antagonist ritanserin were intrathecally injected prior to OT injection in the separate groups. Intrathecal injection of 0.125 μg and 0.5 μg OT attenuated the hindpaw hyperalgesia. The expression of OT receptors and 5-HT2A receptors in the L4-L5 spinal dorsal horn significantly increased following intrathecal injection of 0.5 μg OT. Intrathecal administration of either the OT receptor antagonist atosiban or 5-HT2A receptor antagonist ritanserin blocked the analgesic effect of OT. These results suggest that OT may inhibit hindpaw hyperalgesia evoked by orofacial inflammation combined with stress through OT receptors and/or 5-HT2A receptors, thus providing a therapeutic prospect for drugs targeting the OT system and for patients with comorbidity of TMD and FMS.
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Affiliation(s)
- Yue-Xin Li
- Key Laboratory of Shaanxi Province
for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi’an Jiaotong University College of
Stomatology, China
- Department of Special Dental Care, Xi’an Jiaotong University College of
Stomatology, China
| | - Jia-Heng Li
- Key Laboratory of Shaanxi Province
for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi’an Jiaotong University College of
Stomatology, China
| | - Yi Guo
- Key Laboratory of Shaanxi Province
for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi’an Jiaotong University College of
Stomatology, China
| | - Zhuo-Ying Tao
- Key Laboratory of Shaanxi Province
for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi’an Jiaotong University College of
Stomatology, China
| | - Shi-Hao Qin
- Key Laboratory of Shaanxi Province
for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi’an Jiaotong University College of
Stomatology, China
- Department of Special Dental Care, Xi’an Jiaotong University College of
Stomatology, China
| | - Richard J Traub
- Department of Neural and Pain
Sciences, School of Dentistry, Center to Advance Chronic Pain Research, University of Maryland
Baltimore, Baltimore, MD, USA
| | - Hong An
- Department of Special Dental Care, Xi’an Jiaotong University College of
Stomatology, China
| | - Dong-Yuan Cao
- Key Laboratory of Shaanxi Province
for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi’an Jiaotong University College of
Stomatology, China
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32
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Abstract
The serotonin (5-hydroxytryptamine, 5-HT) 2A receptor is most well known as the common target for classic psychedelic compounds. Interestingly, the 5-HT2A receptor is the most widely expressed mammalian serotonin receptor and is found in nearly every examined tissue type including neural, endocrine, endothelial, immune, and muscle, suggesting it could be a novel and pharmacological target for several types of disorders. Despite this, the bulk of research on the 5-HT2A receptor is focused on its role in the central nervous system (CNS). Recently, activation of 5-HT2A receptors has emerged as a new anti-inflammatory strategy. This review will describe recent findings regarding psychedelics as anti-inflammatory compounds, as well as parse out differences in functional selectivity and immune regulation that exist between a number of well-known hallucinogenic compounds.
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Affiliation(s)
- Thomas W Flanagan
- Department of Pharmacology and Experimental Therapeutics, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - Charles D Nichols
- Department of Pharmacology and Experimental Therapeutics, Louisiana State University Health Sciences Center, New Orleans, LA, USA.
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de la Fuente Revenga M, Shah UH, Nassehi N, Jaster AM, Hemanth P, Sierra S, Dukat M, González-Maeso J. Psychedelic-like Properties of Quipazine and Its Structural Analogues in Mice. ACS Chem Neurosci 2021; 12:831-844. [PMID: 33400504 PMCID: PMC7933111 DOI: 10.1021/acschemneuro.0c00291] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Known classic psychedelic serotonin 2A receptor (5-HT2AR) agonists retain a tryptamine or phenethylamine at their structural core. However, activation of the 5-HT2AR can be elicited by drugs lacking these fundamental scaffolds. Such is the case of the N-substituted piperazine quipazine. Here, we show that quipazine bound to and activated 5-HT2AR as measured by [3H]ketanserin binding displacement, Ca2+ mobilization, and accumulation of the canonical Gq/11 signaling pathway mediator inositol monophosphate (IP1) in vitro and in vivo. Additionally, quipazine induced via 5-HT2AR an expression pattern of immediate early genes (IEG) in the mouse somatosensory cortex consistent with that of classic psychedelics. In the mouse head-twitch response (HTR) model of psychedelic-like action, quipazine produced a lasting effect with high maximal responses during the peak effect that were successfully blocked by the 5-HT2AR antagonist M100907 and absent in 5-HT2AR knockout (KO) mice. The acute effect of quipazine on HTR appeared to be unaffected by serotonin depletion and was independent from 5-HT3R activation. Interestingly, some of these features were shared by its deaza bioisostere 2-NP, but not by other closely related piperazine congeners, suggesting that quipazine might represent a distinct cluster within the family of psychoactive piperazines. Together, our results add to the mounting evidence that quipazine's profile matches that of classic psychedelic 5-HT2AR agonists at cellular signaling and behavioral pharmacology levels.
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Affiliation(s)
- Mario de la Fuente Revenga
- Department of Physiology and Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
- Virginia Institute of Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, Virginia 23219, United States
| | - Urjita H Shah
- Department of Physiology and Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - Nima Nassehi
- Department of Physiology and Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - Alaina M Jaster
- Department of Physiology and Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - Prithvi Hemanth
- Department of Medicinal Chemistry, Virginia Commonwealth University School of Pharmacy, Richmond, Virginia 23298, United States
| | - Salvador Sierra
- Department of Physiology and Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
| | - Malgorzata Dukat
- Department of Medicinal Chemistry, Virginia Commonwealth University School of Pharmacy, Richmond, Virginia 23298, United States
| | - Javier González-Maeso
- Department of Physiology and Biophysics, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298, United States
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Abstract
Nicotine use and dependence, typically achieved through cigarette smoking, but increasingly through vape products, is the leading cause of preventable death today. Despite a recognition that many current smokers would like to quit, the success rate at doing so is low and indicative of the persistent nature of nicotine dependence and the high urge to relapse. There are currently three main forms of pharmacotherapy approved as aids to treat nicotine dependence: a variety of nicotine replacement products (NRT's), the mixed NA/DA reuptake inhibitor bupropion (Zyban®), and the preferential nicotinic α4β2 receptor agonist drug, varenicline (Chantix®); the latter being generally recognized to be the most effective. However, each of these approaches afford only limited efficacy, and various other pharmacological approaches are being explored. This chapter focusses on approaches targeted to the serotonin (5-HT) system, namely, selective serotonin reuptake inhibitors (SSRI's) which served a pioneer role in the investigation of serotoninergic modulators in human smoking cessation trials; and secondly drugs selectively interacting with the 5-HT2A and 5-HT2C receptor systems. From an efficacy perspective, measured as smoking abstinence, the 5-HT2A agonist psychedelics, namely psilocybin, seem to show the most promise; although as the article highlights, these findings are both preliminary and there are significant challenges to the route to approval, and therapeutic use of this class should they reach approval status. Additional avenues include 5-HT2C receptor agonists, which until recently was pioneered by lorcaserin, and 5-HT2A receptor antagonists represented by pimavanserin. Each of these approaches has distinct profiles across preclinical tests of nicotine dependence, and may have therapeutic potential. It is anticipated as diagnostic and predictive biomarkers emerge, they may provide opportunities for subject stratification and opportunities for personalizing smoking cessation treatment. The clinical assessment of SSRI, 5-HT2A and/or 5-HT2C receptor-based treatments may be best served by this process.
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Affiliation(s)
- Guy A Higgins
- Intervivo Solutions Inc, Fergus, ON, Canada; Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON, Canada.
| | - Edward M Sellers
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON, Canada; Department of Medicine and Psychiatry, University of Toronto, Toronto, ON, Canada; DL Global Partners Inc., Toronto, ON, Canada
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Ibarra-Lecue I, Diez-Alarcia R, Urigüen L. Serotonin 2A receptors and cannabinoids. Prog Brain Res 2021; 259:135-175. [PMID: 33541675 DOI: 10.1016/bs.pbr.2021.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Accumulating evidence has proven that both exogenous cannabinoids as well as imbalances in the endocannabinoid system are involved in the onset and development of mental disorders such as anxiety, depression, or schizophrenia. Extensive recent research in this topic has mainly focused on the molecular mechanisms by which cannabinoid agonists may contribute to the pathophysiology of these disorders. Initially, serotonin neurotransmitter garnered most attention due to its relationship to mood disorders and mental diseases, with little attention to specific receptors. To date, the focus has redirected toward the understanding of different serotonin receptors, through a demonstration of its versatile pharmacology and synergy with different modulators. Serotonin 2A receptors are a good example of this phenomenon, and the complex signaling that they trigger appears of high relevance in the context of mental disorders, especially in schizophrenia. This chapter will analyze most relevant attributes of serotonin 2A receptors and the endocannabinoid system, and will highlight the evidence toward the functional bidirectional interaction between these elements in the brain as well as the impact of the endocannabinoid system dysregulation on serotonin 2A receptors functionality.
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Affiliation(s)
- Inés Ibarra-Lecue
- Department of Pharmacology, University of the Basque Country, UPV/EHU, Leioa, Spain; Centro de Investigación Biomédica en Red de Salud Mental CIBERSAM, Madrid, Spain
| | - Rebeca Diez-Alarcia
- Department of Pharmacology, University of the Basque Country, UPV/EHU, Leioa, Spain; Centro de Investigación Biomédica en Red de Salud Mental CIBERSAM, Madrid, Spain; Biocruces Bizkaia Health Research Institute, Bizkaia, Spain
| | - Leyre Urigüen
- Department of Pharmacology, University of the Basque Country, UPV/EHU, Leioa, Spain; Centro de Investigación Biomédica en Red de Salud Mental CIBERSAM, Madrid, Spain; Biocruces Bizkaia Health Research Institute, Bizkaia, Spain.
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36
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Luo YC, Zhang YQ, Hu K, Zhang Z, Xiong MQ, Hu WH, Dong ML, Shang M. [5-HT(2A) receptor/protein kinase C pathway in mediating long-term facilitation of carotid sinus nerve discharge in chronic intermittent hypoxia rats]. Zhonghua Jie He He Hu Xi Za Zhi 2018; 41:611-615. [PMID: 30138970 DOI: 10.3760/cma.j.issn.1001-0939.2018.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Objective: To explore the role of 5-HT(2A)R/PKC pathway in mediating long-term facilitation (LTF) of carotid sinus nerve (CSN) discharge in chronic intermittent hypoxia (CIH) rats. Methods: With number table, 24 adult SD rats were randomly divided into saline control group (group A, n=6), 5-HT(2A)R antagonist (ketanserin) group (group B, n=6), PKC inhibitor (PKC θ-pseudosubstrate) group (group C, n=6) and combined ketanserin with PKC θ-pseudosubstrate group (group D, n=6). All rats were placed into the animal chambers for CIH treatment, 8 h per day (from 9: 00 to 17: 00) for 4 consecutive weeks. 28 days later, 5 min × 3 times of stimulation with acute intermittent hypoxia (AIH) were given, after that, stable CSN discharge activities were recorded and compared before and after intravenous injection of saline (group A), ketanserin (group B), PKC θ-pseudosubstrate (group C) or ketanserin + PKC θ-pseudosubstrate (group D), respectively. Results: There were no significant difference in the baseline (before AIH stimulation) average peak amplitude of CSN discharge among the four groups (P>0.05). In group A, the amplitude of CSN discharge at 30 min and 60 min after AIH were (5.01 ± 0.53) μV and (4.95 ± 0.34) μV respectively, which were significantly higher than that before AIH (P<0.01). The results implied that the CSN LTF could be induced by AIH in CIH pre-treatment rats. In group B, the amplitude of CSN discharge at 30 min and 60 min after AIH were (3.79 ± 0.42) μV and (3.73 ± 0.46) μV, respectively, which were still significantly higher than that before AIH (P<0.01), showing that carotid sinus nerve LTF couldn't be completely blocked by 5-HT(2A)R antagonist in rats. After injection of PKC θ-pseudosubstrate or ketanserin + PKC θ-pseudosubstrate in group C or D, there were no significant differences in CSN discharge amplitude before and after AIH (P>0.01), suggesting that inhibition of PKC alone or 5-HT(2A)R/PKC pathway could completely block the LTF of CSN. Conclusion: 5-HT(2A)R/PKC pathway was involved in mediating long-term facilitation of carotid sinus nerve discharge in CIH rats.
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Affiliation(s)
- Y C Luo
- Department of Respiratory Disease, Renmin Hospital of Wuhan University, Wuhan 430060, China
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Abstract
This chapter will summarize structure-activity relationships (SAR) that are known for the classic serotonergic hallucinogens (aka psychedelics), focusing on the three chemical types: tryptamines, ergolines, and phenethylamines. In the brain, the serotonin 5-HT2A receptor plays a key role in regulation of cortical function and cognition, and also appears to be the principal target for hallucinogenic/psychedelic drugs such as LSD. It is one of the most extensively studied of the 14 known types of serotonin receptors. Important structural features will be identified for activity and, where possible, those that the psychedelics have in common will be discussed. Because activation of the 5-HT2A receptor is the principal mechanism of action for psychedelics, compounds with 5-HT2A agonist activity generally are quickly discarded by the pharmaceutical industry. Thus, most of the research on psychedelics can be related to activation of 5-HT2A receptors. Therefore, much of the discussion will include not only clinical or anecdotal studies, but also will consider data from animal models as well as a certain amount of molecular pharmacology where it is known.
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Affiliation(s)
- David E Nichols
- Division of Chemical Biology and Medicinal Chemistry, University of North Carolina, Chapel Hill, NC, 27514, USA.
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Marshall AG, Lee-Kubli C, Azmi S, Zhang M, Ferdousi M, Mixcoatl-Zecuatl T, Petropoulos IN, Ponirakis G, Fineman MS, Fadavi H, Frizzi K, Tavakoli M, Jeziorska M, Jolivalt CG, Boulton AJM, Efron N, Calcutt NA, Malik RA. Spinal Disinhibition in Experimental and Clinical Painful Diabetic Neuropathy. Diabetes 2017; 66:1380-1390. [PMID: 28202580 PMCID: PMC5399611 DOI: 10.2337/db16-1181] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 02/08/2017] [Indexed: 12/18/2022]
Abstract
Impaired rate-dependent depression (RDD) of the Hoffman reflex is associated with reduced dorsal spinal cord potassium chloride cotransporter expression and impaired spinal γ-aminobutyric acid type A receptor function, indicative of spinal inhibitory dysfunction. We have investigated the pathogenesis of impaired RDD in diabetic rodents exhibiting features of painful neuropathy and the translational potential of this marker of spinal inhibitory dysfunction in human painful diabetic neuropathy. Impaired RDD and allodynia were present in type 1 and type 2 diabetic rats but not in rats with type 1 diabetes receiving insulin supplementation that did not restore normoglycemia. Impaired RDD in diabetic rats was rapidly normalized by spinal delivery of duloxetine acting via 5-hydroxytryptamine type 2A receptors and temporally coincident with the alleviation of allodynia. Deficits in RDD and corneal nerve density were demonstrated in patients with painful diabetic neuropathy compared with healthy control subjects and patients with painless diabetic neuropathy. Spinal inhibitory dysfunction and peripheral small fiber pathology may contribute to the clinical phenotype in painful diabetic neuropathy. Deficits in RDD may help identify patients with spinally mediated painful diabetic neuropathy who may respond optimally to therapies such as duloxetine.
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Affiliation(s)
- Andrew G Marshall
- Faculty of Medical and Human Sciences, Centre for Endocrinology and Diabetes, Institute of Human Development, University of Manchester, and National Institute for Health Research/Wellcome Trust Clinical Research Facility, Manchester, U.K
- Department of Clinical Neurophysiology, Manchester Royal Infirmary, Central Manchester University Hospitals National Health Service Foundation Trust, Manchester Academic Health Science Centre, Manchester, U.K
| | - Corinne Lee-Kubli
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | - Shazli Azmi
- Faculty of Medical and Human Sciences, Centre for Endocrinology and Diabetes, Institute of Human Development, University of Manchester, and National Institute for Health Research/Wellcome Trust Clinical Research Facility, Manchester, U.K
| | - Michael Zhang
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, U.K
| | - Maryam Ferdousi
- Faculty of Medical and Human Sciences, Centre for Endocrinology and Diabetes, Institute of Human Development, University of Manchester, and National Institute for Health Research/Wellcome Trust Clinical Research Facility, Manchester, U.K
| | | | - Ioannis N Petropoulos
- Faculty of Medical and Human Sciences, Centre for Endocrinology and Diabetes, Institute of Human Development, University of Manchester, and National Institute for Health Research/Wellcome Trust Clinical Research Facility, Manchester, U.K
- Department of Medicine, Weill Cornell Medicine-Qatar, Doha, Qatar
| | - Georgios Ponirakis
- Faculty of Medical and Human Sciences, Centre for Endocrinology and Diabetes, Institute of Human Development, University of Manchester, and National Institute for Health Research/Wellcome Trust Clinical Research Facility, Manchester, U.K
- Department of Medicine, Weill Cornell Medicine-Qatar, Doha, Qatar
| | - Mark S Fineman
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | - Hassan Fadavi
- Faculty of Medical and Human Sciences, Centre for Endocrinology and Diabetes, Institute of Human Development, University of Manchester, and National Institute for Health Research/Wellcome Trust Clinical Research Facility, Manchester, U.K
| | - Katie Frizzi
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | - Mitra Tavakoli
- Faculty of Medical and Human Sciences, Centre for Endocrinology and Diabetes, Institute of Human Development, University of Manchester, and National Institute for Health Research/Wellcome Trust Clinical Research Facility, Manchester, U.K
- Faculty of Medicine, University of Exeter Medical School, Exeter, U.K
| | - Maria Jeziorska
- Faculty of Medical and Human Sciences, Centre for Endocrinology and Diabetes, Institute of Human Development, University of Manchester, and National Institute for Health Research/Wellcome Trust Clinical Research Facility, Manchester, U.K
| | - Corinne G Jolivalt
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | - Andrew J M Boulton
- Faculty of Medical and Human Sciences, Centre for Endocrinology and Diabetes, Institute of Human Development, University of Manchester, and National Institute for Health Research/Wellcome Trust Clinical Research Facility, Manchester, U.K
| | - Nathan Efron
- School of Optometry and Vision Science, Queensland University of Technology, Brisbane, Australia
| | - Nigel A Calcutt
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | - Rayaz A Malik
- Faculty of Medical and Human Sciences, Centre for Endocrinology and Diabetes, Institute of Human Development, University of Manchester, and National Institute for Health Research/Wellcome Trust Clinical Research Facility, Manchester, U.K.
- Department of Medicine, Weill Cornell Medicine-Qatar, Doha, Qatar
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Wu H, Wang FF, Zhou WH, Gu GZ, Yu SF. [Influence of occupational stress and 5-hydroxytryptamine 2A receptor gene polymorphisms on depression in workers in a thermal power plant]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2016; 34:721-725. [PMID: 28043241 DOI: 10.3760/cma.j.issn.1001-9391.2016.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Objective: To investigate the association of occupational stress and 5-hydroxytryptamine 2A (5-HT2A) receptor gene polymorphisms with depression. Methods: In November 2010, cluster sampling was used to select 589 workers in a thermal power plant as study subjects. Questionnaires were used to investigate demographic features and occupational stressors. Polymerase chain reaction-restriction fragment length polymorphism was used to detect the genotypes of T102C and A-1438G in 5-HT2A receptor gene in 589 workers. Results: High-level daily hassles (OR=3.013, 95%CI 1.642~5.530) , more negative emotion (OR=4.808, 95% CI 2.662~8.681) , more body needs (OR=1.890, 95% CI 1.034~3.453) , and severe role conflict (OR=1.815, 95% CI 1.002~3.288) were risk factors for depression, while high rewards (OR=0.424, 95% CI 0.226~0.796) was the protective factor against depression (all P<0.05). There were no significant differences in T102C genotype and allele distributions between the groups with and without depression (P>0.05) ; there was a significant difference in A-1438G genotype distribution between the groups with and without depression (χ2= 9.573, P<0.05) , while there was no significant difference in A-1438G allele distribution between these groups (P>0.05). The risk of depression in the workers with high-level daily hassles who carried TC genotype (OR= 4.473, 95% CI 1.161~17.238) or CC genotype (OR=5.176, 95% CI 1.367~19.593) of T102C was 4.473 and 5.176 times that in those with low-level daily hassles who carried TT genotype, and the risk of depression in the workers with more negative emotions who carried TC genotype (OR=5.667, 95%CI 1.204~26.673) or CC genotype (OR=8.114, 95% CI 1.747~37.677) of T102C was 5.667 and 8.114 times that in those with less negative emotion who carried TT genotype. The risk of depression in the workers with high-level daily hassles who carried AG genotype (OR=4.505, 95% CI 2.215~9.162) or GG genotype (OR=6.484, 95% CI 2.562~ 16.414) of A-1438G was 4.505 and 6.484 times that in those with low-level daily hassles who carried AA genotype, and the risk of depression in the workers with more negative emotion who carried AG genotype (OR= 4.877, 95%CI 2.326~10.223) or GG genotype (OR=9.090, 95%CI 3.491~23.673) of A-1438G was 4.877 and 9.090 times that in those with less negative emotion who carried AA genotype. The risk of depression in the workers with higher rewards who carried AG genotype (OR=0.152, 95%CI 0.074~0.310) or GG genotype (OR= 0.384, 95% CI 0.153~0.964) of A-1438G was 0.152 and 0.384 times that in those with lower rewards who carried AA genotype. Conclusion: Occupational stress is associated with the development of depression and interacts with 5-HT2A receptor gene polymorphisms.
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Affiliation(s)
- H Wu
- Henan Provincial Institute of Occupational Health, Zhengzhou 450052, China
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Kuypers KPC, Riba J, de la Fuente Revenga M, Barker S, Theunissen EL, Ramaekers JG. Ayahuasca enhances creative divergent thinking while decreasing conventional convergent thinking. Psychopharmacology (Berl) 2016; 233:3395-403. [PMID: 27435062 PMCID: PMC4989012 DOI: 10.1007/s00213-016-4377-8] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 07/06/2016] [Indexed: 01/09/2023]
Abstract
INTRODUCTION Ayahuasca is a South American psychotropic plant tea traditionally used in Amazonian shamanism. The tea contains the psychedelic 5-HT2A receptor agonist N,N-dimethyltryptamine (DMT), plus β-carboline alkaloids with monoamine oxidase-inhibiting properties. Increasing evidence from anecdotal reports and open-label studies indicates that ayahuasca may have therapeutic effects in treatment of substance use disorders and depression. A recent study on the psychological effects of ayahuasca found that the tea reduces judgmental processing and inner reactivity, classic goals of mindfulness psychotherapy. Another psychological facet that could potentially be targeted by ayahuasca is creative divergent thinking. This mode of thinking can enhance and strengthen psychological flexibility by allowing individuals to generate new and effective cognitive, emotional, and behavioral strategies. The present study aimed to assess the potential effects of ayahuasca on creative thinking. METHODS We visited two spiritual ayahuasca workshops and invited participants to conduct creativity tests before and during the acute effects of ayahuasca. In total, 26 participants consented. Creativity tests included the "pattern/line meanings test" (PLMT) and the "picture concept test" (PCT), both assessing divergent thinking and the latter also assessing convergent thinking. RESULTS While no significant effects were found for the PLMT, ayahuasca intake significantly modified divergent and convergent thinking as measured by the PCT. While convergent thinking decreased after intake, divergent thinking increased. CONCLUSIONS The present data indicate that ayahuasca enhances creative divergent thinking. They suggest that ayahuasca increases psychological flexibility, which may facilitate psychotherapeutic interventions and support clinical trial initiatives.
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Affiliation(s)
- K P C Kuypers
- Department of Neuropsychology and Psychopharmacology, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.
| | - J Riba
- Human Experimental Neuropsychopharmacology, Sant Pau Institute of Biomedical Research, Barcelona, Spain
| | - M de la Fuente Revenga
- Human Experimental Neuropsychopharmacology, Sant Pau Institute of Biomedical Research, Barcelona, Spain
| | - S Barker
- Department of Comparative Biomedical Sciences, Louisiana State University, Baton Rouge, LA, USA
| | - E L Theunissen
- Department of Neuropsychology and Psychopharmacology, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - J G Ramaekers
- Department of Neuropsychology and Psychopharmacology, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands
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Chaki S, Ozaki S. [Research into and development of therapeutic drugs for patients with schizophrenia]. Nihon Yakurigaku Zasshi 2012; 140:101. [PMID: 23243706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
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Talbot PS, Slifstein M, Hwang DR, Huang Y, Scher E, Abi-Dargham A, Laruelle M. Extended characterisation of the serotonin 2A (5-HT2A) receptor-selective PET radiotracer 11C-MDL100907 in humans: quantitative analysis, test-retest reproducibility, and vulnerability to endogenous 5-HT tone. Neuroimage 2011; 59:271-85. [PMID: 21782029 DOI: 10.1016/j.neuroimage.2011.07.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Revised: 06/29/2011] [Accepted: 07/01/2011] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Scanning properties and analytic methodology of the 5-HT2A receptor-selective positron emission tomography (PET) tracer 11C-MDL100907 have been partially characterised in previous reports. We present an extended characterisation in healthy human subjects. METHODS 64 11C-MDL100907 PET scans with metabolite-corrected arterial input function were performed in 39 healthy adults (18-55 years). 12 subjects were scanned twice (duration 150 min) to provide data on plasma analysis, model order estimation, and stability and test-retest characteristics of outcome measures. All other scans were 90 min duration. 3 subjects completed scanning at baseline and following 5-HT2A receptor antagonist medication (risperidone or ciproheptadine) to provide definitive data on the suitability of the cerebellum as reference region. 10 subjects were scanned under reduced 5-HT and control conditions using rapid tryptophan depletion to investigate vulnerability to competition with endogenous 5-HT. 13 subjects were scanned as controls in clinical protocols. Pooled data were used to analyse the relationship between tracer injected mass and receptor occupancy, and age-related decline in 5-HT2A receptors. RESULTS Optimum analytic method was a 2-tissue compartment model with arterial input function. However, basis function implementation of SRTM may be suitable for measuring between-group differences non-invasively and warrants further investigation. Scan duration of 90 min achieved stable outcome measures in all cortical regions except orbitofrontal which required 120 min. Binding potential (BPP and BPND) test-retest variability was very good (7-11%) in neocortical regions other than orbitofrontal, and moderately good (14-20%) in orbitofrontal cortex and medial temporal lobe. Saturation occupancy of 5-HT2A receptors by risperidone validates the use of the cerebellum as a region devoid of specific binding for the purposes of PET. We advocate a mass limit of 4.6 μg to remain below 5% receptor occupancy. 11C-MDL100907 specific binding is not vulnerable to competition with endogenous 5-HT in humans. Paradoxical decreases in BPND were found in right prefrontal cortex following reduced 5-HT, possibly representing receptor internalisation. Mean age-related decline in brain 5-HT2A receptors was 14.0±5.0% per decade, and higher in prefrontal regions. CONCLUSIONS Our data confirm and extend support for 11C-MDL100907 as a PET tracer with very favourable properties for quantifying 5-HT2A receptors in the human brain.
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Affiliation(s)
- Peter S Talbot
- Department of Psychiatry, Columbia University College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY 10032, USA.
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Chaki S, Yoshida S, Okuyama S. [Targeting metabotropic glutamate receptors to develop novel antipsychotics]. Nihon Shinkei Seishin Yakurigaku Zasshi 2010; 30:207-213. [PMID: 21226317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Based on the glutamate hypothesis of schizophrenia, extensive studies to develop drugs acting on glutamate receptors have been conducted. Among glutamate receptors, metabotropic glutamate (mGlu) receptors, all of which are GPCRs, have 8 subtypes, and are involved in regulation of glutamate transmissions. Of these, much attention has been paid to mGlu2/3 receptors and mGlu5 receptor. mGlu2/3 receptor agonists improve behavioral abnormalities such as locomotor hyperactivity and cognitive deficits induced by NMDA receptor antagonists. In addition, mGlu2/3 receptor agonists attenuate glutamate overflow in the prefrontal cortex, and regulate dopamine release and 5-HT2A receptor activity, all of which have been presumed to be involved in antipsychotic actions of mGlu2/3 receptor agonists. Recently, LY2140023, an mGlu2/3 receptor agonists developed by Eli Lilly, has been demonstrated to be effective for the treatment of positive and negative symptoms of schizophrenic patients in a phase II study, while it did not cause unwanted side effects often observed with current antipsychotic medications. Moreover, a series of experiments has demonstrated that mGlu5 receptor potentiators exert antipsychotic effects in animal models of schizophrenia. Therefore, mGlu2/3 receptor and mGlu5 receptor may provide exciting targets for the development of novel medications for schizophrenia.
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Affiliation(s)
- Shigeyuki Chaki
- Molecular Function and Pharmacology Laboratories, Pharmaceutical Business Group, Taisho Pharmaceutical Co., Ltd., 1-403 Yoshino-cho, Kita-ku, Saitama 331-8530, Japan.
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Nishihira K, Yamashita A, Tanaka N, Moriguchi-Goto S, Imamura T, Ishida T, Kawashima S, Yamamoto R, Kitamura K, Asada Y. Serotonin induces vasoconstriction of smooth muscle cell-rich neointima through 5-hydroxytryptamine2A receptor in rabbit femoral arteries. J Thromb Haemost 2008; 6:1207-14. [PMID: 18435827 DOI: 10.1111/j.1538-7836.2008.02996.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Smooth muscle cell (SMC)-rich intima is a morphological feature of atherosclerotic lesions that is observed in eroded plaque and spastic arteries. Arteries with SMC-rich intima are susceptible to vasoconstriction or vasospasm against some vasoactive agents. OBJECTIVE The present study evaluates the contribution of SMC-rich intima to thrombogenic vasoconstriction. METHODS We established SMC-rich neointima by damaging rabbit femoral arteries using balloons and then measured the isometric tension of the femoral strips against 5-hydroxytryptamine (5-HT), adenosine diphosphate, adenosine triphosphate and thrombin. RESULTS Among these agents, only 5-HT induced a hypercontractile response of the injured arteries with SMC-rich neointima, compared with non-injured arteries. Smooth muscle cells of both the neointima and media expressed 5-HT(2A) receptor, and sarpogrelate, a selective 5-HT(2A) receptor antagonist significantly inhibited the hypercontraction. Furthermore, 5-HT induced contraction of separated neointima and hypercontraction of separated media compared with non-injured media. Sarpogrelate and fasudil, a specific Rho-kinase inhibitor, significantly suppressed such contraction of both the neointima and media of injured arteries. CONCLUSIONS These results suggest that 5-HT plays a crucial role in thrombogenic vasoconstriction, and that SMC-rich intima as well as media directly contributes to the hypercontractile response of atherosclerotic vessels through the 5-HT(2A) receptor and the Rho-kinase pathway.
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Affiliation(s)
- K Nishihira
- Division of Circulatory and Body Fluid Regulation, Department of Internal Medicine, University of Miyazaki, Miyazaki, Japan
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Lee MD, Somerville EM, Kennett GA, Dourish CT, Clifton PG. Reduced hypophagic effects of d-fenfluramine and the 5-HT2C receptor agonist mCPP in 5-HT1B receptor knockout mice. Psychopharmacology (Berl) 2004; 176:39-49. [PMID: 15138762 DOI: 10.1007/s00213-004-1864-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2003] [Accepted: 02/29/2004] [Indexed: 10/26/2022]
Abstract
RATIONALE The possible role of compensatory changes in 5-HT2C receptors in the reduced hypophagic action of d-fenfluramine in 5-HT1B knockout (KO) mice was assessed by comparing their response to d-fenfluramine and the 5-HT2C receptor agonist mCPP. In addition we measured 5-HT(2C/A) receptor binding in 5-HT1B KO and wild-type (WT) mice and examined the effects of 5-HT1B receptor antagonists on d-fenfluramine-induced hypophagia in WT mice. METHODS Hypophagic responses to d-fenfluramine (1-30 mg/kg) and mCPP (1-5.6 mg/kg) were measured using a behavioural satiety sequence paradigm. The effects of the 5-HT1B receptor antagonists GR 127,935 and SB 224289 in opposing the hypophagic action of d-fenfluramine were evaluated in WT mice. The binding of [3H]-mesulergine was compared in the brains of both mouse strains. RESULTS The hypophagic effects of moderate doses of d-fenfluramine and mCPP were attenuated in 5-HT1B KO mice. Pretreatment of WT mice with the 5-HT(1B/1D) receptor antagonist GR 127,935, or food-deprived WT mice with the 5-HT1B receptor antagonist SB 224289, did not reproduce the reduction in sensitivity to the effects of d-fenfluramine on feeding behaviour observed in 5-HT1B KO mice. Estimates of 5-HT2C receptor binding were similar in 5-HT1B KO and WT mice. CONCLUSIONS The hypophagic effect of d-fenfluramine in mice is unlikely to be mediated by the 5-HT1B receptor. Instead, the evidence suggests that an adaptive change in 5-HT2C receptor function occurs in 5-HT1B receptor KO mice and contributes to their reduced response to d-fenfluramine.
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MESH Headings
- Animals
- Binding Sites/drug effects
- Binding Sites/physiology
- Cerebral Cortex/drug effects
- Cerebral Cortex/metabolism
- Cerebral Cortex/ultrastructure
- Dose-Response Relationship, Drug
- Drug Administration Schedule
- Drug Evaluation, Preclinical/methods
- Eating/drug effects
- Ergolines/administration & dosage
- Ergolines/pharmacokinetics
- Fenfluramine/administration & dosage
- Fenfluramine/pharmacokinetics
- Genotype
- Injections, Intraperitoneal
- Injections, Subcutaneous
- Isomerism
- Mianserin/pharmacology
- Mice
- Mice, Knockout/genetics
- Piperazines/administration & dosage
- Piperazines/pharmacokinetics
- Piperidones/administration & dosage
- Piperidones/pharmacokinetics
- Receptor, Serotonin, 5-HT1B/deficiency
- Receptor, Serotonin, 5-HT1B/genetics
- Receptor, Serotonin, 5-HT2A
- Receptor, Serotonin, 5-HT2C/administration & dosage
- Satiation/drug effects
- Satiation/physiology
- Satiety Response/drug effects
- Satiety Response/physiology
- Serotonin 5-HT2 Receptor Agonists
- Species Specificity
- Spiperone/pharmacology
- Spiro Compounds/administration & dosage
- Spiro Compounds/pharmacokinetics
- Time Factors
- Tritium
- United Kingdom
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Affiliation(s)
- Michelle D Lee
- Department of Psychology, University of Sussex, Brighton, Sussex, BN1 9QG, UK
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Radhakrishnan R, King EW, Dickman JK, Herold CA, Johnston NF, Spurgin ML, Sluka KA. Spinal 5-HT(2) and 5-HT(3) receptors mediate low, but not high, frequency TENS-induced antihyperalgesia in rats. Pain 2003; 105:205-13. [PMID: 14499437 PMCID: PMC2746627 DOI: 10.1016/s0304-3959(03)00207-0] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Transcutaneous electrical nerve stimulation (TENS) is a form of non-pharmacological treatment for pain. Involvement of descending inhibitory systems is implicated in TENS-induced analgesia. In the present study, the roles of spinal 5-HT and alpha(2)-adrenoceptors in TENS analgesia were investigated in rats. Hyperalgesia was induced by inflaming the knee joint with 3% kaolin-carrageenan mixture and assessed by measuring paw withdrawal latency (PWL) to heat before and 4 h after injection. The (1). alpha(2)-adrenergic antagonist yohimbine (30 microg), (2). 5-HT antagonist methysergide (5-HT(1). and 5-HT(2). 30 microg), one of the 5-HT receptor subtype antagonists, (3). NAN-190 (5-HT(1A), 15 microg), (4). ketanserin (5-HT(2A), 30 microg), (5). MDL-72222 (5-HT(3), 12 microg), or (6). vehicle was administered intrathecally prior to TENS treatment. Low (4 Hz) or high (100 Hz) frequency TENS at sensory intensity was then applied to the inflamed knee for 20 min and PWL was determined. Selectivity of the antagonists used was confirmed using respective agonists administered intrathecally. Yohimbine had no effect on the antihyperalgesia produced by low or high frequency TENS. Methysergide and MDL-72222 prevented the antihyperalgesia produced by low, but not high, frequency TENS. Ketanserin attenuated the antihyperalgesic effects of low frequency TENS whereas NAN-190 had no effect. The results from the present study show that spinal 5-HT receptors mediate low, but not high, frequency TENS-induced antihyperalgesia through activation of 5-HT(2A) and 5-HT(3) receptors in rats. Furthermore, spinal noradrenergic receptors are not involved in either low or high frequency TENS antihyperalgesia.
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Affiliation(s)
- Rajan Radhakrishnan
- Graduate Program in Physical Therapy and Rehabilitation Science, College of Medicine 1-252 Medical Education Building, University of Iowa, Iowa City, IA 52242-1190, USA
- Pain Research Program, College of Medicine, University of Iowa, Iowa City, IA 52242-1190, USA
- Neuroscience Graduate Program, College of Medicine, University of Iowa, Iowa City, IA 52242-1190, USA
| | - Ellen W. King
- Graduate Program in Physical Therapy and Rehabilitation Science, College of Medicine 1-252 Medical Education Building, University of Iowa, Iowa City, IA 52242-1190, USA
| | - Janelle K. Dickman
- Graduate Program in Physical Therapy and Rehabilitation Science, College of Medicine 1-252 Medical Education Building, University of Iowa, Iowa City, IA 52242-1190, USA
| | - Carli A. Herold
- Graduate Program in Physical Therapy and Rehabilitation Science, College of Medicine 1-252 Medical Education Building, University of Iowa, Iowa City, IA 52242-1190, USA
| | - Natalie F. Johnston
- Graduate Program in Physical Therapy and Rehabilitation Science, College of Medicine 1-252 Medical Education Building, University of Iowa, Iowa City, IA 52242-1190, USA
| | - Megan L. Spurgin
- Graduate Program in Physical Therapy and Rehabilitation Science, College of Medicine 1-252 Medical Education Building, University of Iowa, Iowa City, IA 52242-1190, USA
| | - Kathleen A. Sluka
- Graduate Program in Physical Therapy and Rehabilitation Science, College of Medicine 1-252 Medical Education Building, University of Iowa, Iowa City, IA 52242-1190, USA
- Pain Research Program, College of Medicine, University of Iowa, Iowa City, IA 52242-1190, USA
- Neuroscience Graduate Program, College of Medicine, University of Iowa, Iowa City, IA 52242-1190, USA
- Corresponding author. Tel.: +1-319-335-9791; fax: + 1-319-335-9707. E-mail address: (K.A. Sluka)
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Oswald P, Souery D, Massat I, Del-Favero J, Linotte S, Papadimitriou G, Dikeos D, Kaneva R, Milanova V, Oruc L, Ivezic S, Serretti A, Lilli R, Van Broeckhoven C, Mendlewicz J. Lack of association between the 5HT2A receptor polymorphism (T102C) and unipolar affective disorder in a multicentric European study. Eur Neuropsychopharmacol 2003; 13:365-8. [PMID: 12957335 DOI: 10.1016/s0924-977x(03)00041-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We report here a case-control association study with T102C polymorphism in the serotonin 2A receptor gene (HTR2A) in patients affected by unipolar affective disorder (UPAD) and in controls. A total of 284 subjects were genotyped (142 UPAD and 142 controls). All subjects were interviewed using standard diagnostic interviews and matched. A homogenous population of unipolar patients with suicidal attempt was identified. Conditional logistic regression was applied. No association of the HTR2A polymorphism was found in the overall sample of 142 UPAD-control pairs regarding allele and genotype frequencies (P=0.36 and P=0.52 respectively) and homo-heterozygote distributions (P=0.91). This study confirms, in a multicentric European sample, the earlier observations that the T102C HTR2A polymorphism is not associated with UPAD. Nevertheless, a type 2 statistical error cannot be excluded. Therefore, to exclude the implication of HTR2A in UPAD, this result must be replicated in larger samples and in other populations using the transmission disequilibrium test and different polymorphisms around HTR2A.
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Affiliation(s)
- Pierre Oswald
- University Clinics of Brussels, Erasme Hospital, Free University of Brussels, Brussels, Belgium.
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48
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González-Maeso J, Yuen T, Ebersole BJ, Wurmbach E, Lira A, Zhou M, Weisstaub N, Hen R, Gingrich JA, Sealfon SC. Transcriptome fingerprints distinguish hallucinogenic and nonhallucinogenic 5-hydroxytryptamine 2A receptor agonist effects in mouse somatosensory cortex. J Neurosci 2003; 23:8836-43. [PMID: 14523084 PMCID: PMC6740401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023] Open
Abstract
Most neuropharmacological agents and many drugs of abuse modulate the activity of heptahelical G-protein-coupled receptors. Although the effects of these ligands result from changes in cellular signaling, their neurobehavioral activity may not correlate with results of in vitro signal transduction assays. 5-Hydroxytryptamine 2A receptor (5-HT2AR) partial agonists that have similar pharmacological profiles differ in the behavioral responses they elicit. In vitro studies suggest that different agonists acting at the same receptor may establish distinct patterns of signal transduction. Testing this hypothesis in the brain requires a global signal transduction assay that is applicable in vivo. To distinguish the cellular effects of the different 5-HT2AR agonists, we developed an assay for global signal transduction on the basis of high throughput quantification of rapidly modulated transcripts. Study of the responses to agonists in human embryonic kidney 293 cells stably expressing 5-HT2ARs demonstrated that each agonist elicits a distinct transcriptome fingerprint. We therefore studied behavioral and cortical signal transduction responses in wild-type and 5-HT2AR null-mutant mice. The hallucinogenic chemicals (+/-)-2,5-dimethoxy-4-iodoamphetamine (DOI) and lysergic acid diethylamide (LSD) stimulated a head-twitch behavioral response that was not observed with the nonhallucinogenic lisuride hydrogen maleate (LHM) and was absent in receptor null-mutant mice. We also found that DOI, LSD, and LHM each induced distinct transcriptome fingerprints in somatosensory cortex that were absent in 5-HT2AR null-mutants. Moreover, DOI and LSD showed similarities in the transcriptome fingerprints obtained that were not observed with the behaviorally inactive drug LHM. Our results demonstrate that chemicals acting at the 5-HT2AR induce specific cellular response patterns in vivo that are reflected in unique changes in the somatosensory cortex transcriptome.
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Affiliation(s)
- Javier González-Maeso
- Department of Neurology, Mount Sinai School of Medicine, New York, New York 10029, USA
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49
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Abstract
5-HT(2A) serotonin receptors represent the principal molecular targets for LSD-like hallucinogens and atypical antipsychotic drugs. It has been proposed that a dysregulation of 5-HT(2A) receptor-mediated signaling may contribute to the pathogenesis of schizophrenia and related diseases. A major mechanism for the attenuation of GPCR signaling following agonist activation typically involves the phosphorylation of serine and/or threonine residues by various kinases. Ser/Thr phosphorylation leads to the binding of accessory proteins and the uncoupling of the G proteins, thereby preventing further signaling. The molecular mechanisms by which 5-HT(2A) receptors are desensitized are unknown, and to date, no residues essential for agonist-mediated desensitization have been identified. Thus, we mutated, individually or in groups, all of the 37 serines and threonines in the cytoplasmic domains of the 5-HT(2A) receptor and assessed the effects of these mutations on agonist-mediated desensitization. We discovered that mutation of two residues, S421 in the C-terminal tail and S188 in the second intracellular loop, to alanine resulted in a significant block of agonist-induced desensitization. Intriguingly, a single-nucleotide polymorphism, of unreported frequency, at the S421 locus has been reported (S421F); the S421F mutation, like the S421A mutation, significantly attenuated agonist-mediated desensitization. Taken together, these findings indicate that the process of agonist-mediated desensitization of 5-HT(2A) receptors requires the presence of two nonconserved serine residues located in distinct intracellular loops.
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Affiliation(s)
- John A Gray
- Department of Biochemistry, Case Western Reserve University School of Medicine, 10900 Euclid Avenue, Cleveland, Ohio 44106, USA
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50
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Dahlqvist P, Rönnbäck A, Risedal A, Nergårdh R, Johansson IM, Seckl JR, Johansson BB, Olsson T. Effects of postischemic environment on transcription factor and serotonin receptor expression after permanent focal cortical ischemia in rats. Neuroscience 2003; 119:643-52. [PMID: 12809685 DOI: 10.1016/s0306-4522(03)00195-7] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Housing rats in an enriched environment improves functional outcome after ischemic stroke, this may reflect neuronal plasticity in brain regions outside the lesion. Which components of the enriched environment that are of greatest importance for recovery after brain ischemia is uncertain. We have previously found that enriched environment and social interaction alone both improve functional recovery after focal cerebral ischemia, compared with isolated housing with voluntary wheel-running. In this study, the aim was to separate components of the enriched environment and investigate the effects on some potential mediators of improved functional recovery; such as the inducible transcription factors nerve growth factor-induced gene A (NGFI-A) and NGFI-B, and the glucocorticoid and serotonin systems. After permanent middle cerebral artery occlusion, rats were divided into four groups: individually housed with no equipment (deprived group), individually housed with free access to a running wheel (running group), housed together in a large cage with no equipment (social group) or in a large cage furnished with exchangeable bars, chains and other objects (enriched group). mRNA expression of inducible transcription factors, serotonin and glucocorticoid receptors was determined with in situ hybridisation 1 month after cerebral ischemia. Rats housed in enriched or social environments showed significantly higher mRNA expression of NGFI-A and NGFI-B in cortical regions outside the lesion and in the CA1 (cornu ammonis region of the hippocampus), compared with isolated rats with or without a running wheel. NGFI-A and NGFI-B mRNA expression in cortex and in CA1 was significantly correlated to functional outcome. 5-Hydroxytryptamine receptor 1A (5-HT(1A)) mRNA expression and binding, as well as 5-HT(2A) receptor mRNA expression were decreased in the hippocampus (CA4 region) of the running wheel rats. Mineralocorticoid receptor gene expression was increased in the dentate gyrus amongst wheel-running rats. No group differences were found in plasma corticosterone levels or mRNA levels of glucocorticoid receptor, corticotropin-releasing hormone, 5-HT(2C) or c-fos. In conclusion, we have found that social interaction is a major component of the enriched environment regarding the effects on NGFI-A and NGFI-B expression. These transcription factors may be important mediators of improved functional recovery after brain infarctions, induced by environmental enrichment.
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MESH Headings
- Animals
- Brain Ischemia/genetics
- Brain Ischemia/metabolism
- Brain Ischemia/physiopathology
- Cerebral Cortex/growth & development
- Cerebral Cortex/metabolism
- Cerebral Cortex/physiopathology
- DNA-Binding Proteins/genetics
- Early Growth Response Protein 1
- Environment, Controlled
- Hypothalamo-Hypophyseal System/metabolism
- Hypothalamo-Hypophyseal System/physiopathology
- Immediate-Early Proteins
- Male
- Motor Activity/genetics
- Neuronal Plasticity/genetics
- Nuclear Receptor Subfamily 4, Group A, Member 1
- RNA, Messenger/metabolism
- Rats
- Rats, Inbred SHR
- Receptor, Serotonin, 5-HT2A
- Receptors, Cytoplasmic and Nuclear
- Receptors, Serotonin/genetics
- Receptors, Serotonin/metabolism
- Receptors, Serotonin, 5-HT1
- Receptors, Steroid
- Recovery of Function/genetics
- Sensory Deprivation/physiology
- Social Behavior
- Synaptic Transmission/genetics
- Transcription Factors/genetics
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Affiliation(s)
- P Dahlqvist
- Department of Public Health and Clinical Medicine, Medicine, Umeå University Hospital, S-901 85, Umeå, Sweden
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