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Higa GSV, Viana FJC, Francis-Oliveira J, Cruvinel E, Franchin TS, Marcourakis T, Ulrich H, De Pasquale R. Serotonergic neuromodulation of synaptic plasticity. Neuropharmacology 2024; 257:110036. [PMID: 38876308 DOI: 10.1016/j.neuropharm.2024.110036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 05/15/2024] [Accepted: 06/11/2024] [Indexed: 06/16/2024]
Abstract
Synaptic plasticity constitutes a fundamental process in the reorganization of neural networks that underlie memory, cognition, emotional responses, and behavioral planning. At the core of this phenomenon lie Hebbian mechanisms, wherein frequent synaptic stimulation induces long-term potentiation (LTP), while less activation leads to long-term depression (LTD). The synaptic reorganization of neuronal networks is regulated by serotonin (5-HT), a neuromodulator capable of modify synaptic plasticity to appropriately respond to mental and behavioral states, such as alertness, attention, concentration, motivation, and mood. Lately, understanding the serotonergic Neuromodulation of synaptic plasticity has become imperative for unraveling its impact on cognitive, emotional, and behavioral functions. Through a comparative analysis across three main forebrain structures-the hippocampus, amygdala, and prefrontal cortex, this review discusses the actions of 5-HT on synaptic plasticity, offering insights into its role as a neuromodulator involved in emotional and cognitive functions. By distinguishing between plastic and metaplastic effects, we provide a comprehensive overview about the mechanisms of 5-HT neuromodulation of synaptic plasticity and associated functions across different brain regions.
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Affiliation(s)
- Guilherme Shigueto Vilar Higa
- Laboratório de Neurofisiologia, Departamento de Fisiologia e Biofísica, Universidade de São Paulo, Butantã, São Paulo, SP, 05508-000, Brazil; Departamento de Bioquímica, Instituto de Química (USP), Butantã, São Paulo, SP, 05508-900, Brazil
| | - Felipe José Costa Viana
- Laboratório de Neurofisiologia, Departamento de Fisiologia e Biofísica, Universidade de São Paulo, Butantã, São Paulo, SP, 05508-000, Brazil
| | - José Francis-Oliveira
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, Birmingham, AL, 35233, USA
| | - Emily Cruvinel
- Laboratório de Neurofisiologia, Departamento de Fisiologia e Biofísica, Universidade de São Paulo, Butantã, São Paulo, SP, 05508-000, Brazil
| | - Thainá Soares Franchin
- Laboratório de Neurofisiologia, Departamento de Fisiologia e Biofísica, Universidade de São Paulo, Butantã, São Paulo, SP, 05508-000, Brazil
| | - Tania Marcourakis
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Butantã, São Paulo, SP, 05508-000, Brazil
| | - Henning Ulrich
- Departamento de Bioquímica, Instituto de Química (USP), Butantã, São Paulo, SP, 05508-900, Brazil
| | - Roberto De Pasquale
- Laboratório de Neurofisiologia, Departamento de Fisiologia e Biofísica, Universidade de São Paulo, Butantã, São Paulo, SP, 05508-000, Brazil.
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Antonijevic M, Dallemagne P, Rochais C. Indirect influence on the BDNF/TrkB receptor signaling pathway via GPCRs, an emerging strategy in the treatment of neurodegenerative disorders. Med Res Rev 2024. [PMID: 39180386 DOI: 10.1002/med.22075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/06/2022] [Accepted: 08/04/2024] [Indexed: 08/26/2024]
Abstract
Neuronal survival depends on neurotrophins and their receptors. There are two types of neurotrophin receptors: a nonenzymatic, trans-membrane protein of the tumor necrosis factor receptor (TNFR) family-p75 receptor and the tyrosine kinase receptors (TrkR) A, B, and C. Activation of the TrkBR by brain-derived neurotrophic factor (BDNF) or neurotrophin 4/5 (NT-4/5) promotes neuronal survival, differentiation, and synaptic function. It is shown that in the pathogenesis of several neurodegenerative conditions (Alzheimer's disease, Parkinson's disease, Huntington's disease) the BDNF/TrkBR signaling pathway is impaired. Since it is known that GPCRs and TrkR are regulating several cell functions by interacting with each other and generating a cross-communication in this review we have focused on the interaction between different GPCRs and their ligands on BDNF/TrkBR signaling pathway.
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Yu X, Eid Y, Jama M, Pham D, Ahmed M, Attar MS, Samiuddin Z, Barakat K. Combining machine learning, molecular dynamics, and free energy analysis for (5HT)-2A receptor modulator classification. J Mol Graph Model 2024; 132:108842. [PMID: 39151376 DOI: 10.1016/j.jmgm.2024.108842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 07/03/2024] [Accepted: 08/02/2024] [Indexed: 08/19/2024]
Abstract
The 5-Hydroxytryptamine (5HT)-2A receptor, a key target in psychoactive drug development, presents significant challenges in the design of selective compounds. Here, we describe the construction, evaluation and validation of two machine learning (ML) models for the classification of bioactivity mechanisms against the (5HT)-2A receptor. Employing neural networks and XGBoost models, we achieved an overall accuracy of around 87 %, which was further enhanced through molecular modelling (MM) (e.g. molecular dynamics simulations) and binding free energy analysis. This ML-MM integration provided insights into the mechanisms of direct modulators and prodrugs. A significant outcome of the current study is the development of a 'binding free energy fingerprint' specific to (5HT)-2A modulators, offering a novel metric for evaluating drug efficacy against this target. Our study demonstrates the prospective of employing a successful workflow combining AI with structural biology, offering a powerful tool for advancing psychoactive drug discovery.
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Affiliation(s)
- Xian Yu
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Yasmine Eid
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Maryam Jama
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Diane Pham
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Marawan Ahmed
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Melika Shabani Attar
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Zainab Samiuddin
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Khaled Barakat
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada.
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Canul-Medina G, López-Pech G, Jiménez-Trejo F. Global research in schizophrenia and serotonin: a bibliometric analysis. Front Psychiatry 2024; 15:1436906. [PMID: 39156608 PMCID: PMC11329940 DOI: 10.3389/fpsyt.2024.1436906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Accepted: 07/15/2024] [Indexed: 08/20/2024] Open
Abstract
Background Schizophrenia is a chronic mental illness that affects millions of individuals worldwide. The etiological origin of schizophrenia is heterogeneous, but it has been shown to be associated with dysfunction in serotonin activity, serotonin receptors, and serotonin metabolism in the brain. Bibliometric analysis is a tool used to scrutinise and analyse research activities and evidence in a specific research area. No existing bibliometric analyses have considered both serotonin and schizophrenia. Methods We conducted a bibliometric analysis including 12,027 studies related to the schizophrenia-serotonin link published from the inception of the study to 2023 and available in the Scopus database. We used VOSviewer software to identify global trends, analyse the author and editors keywords, the most cited articles and author, as well as the most productive institutes and journals publishing research on schizophrenia-serotonin link. Results Most publications related to the link between schizophrenia and serotonin are focused on adult humans and examine topics such as antipsychotic agents, depression, and serotonin uptake inhibitors. The Journal of Clinical Psychiatry has published the most papers on the schizophrenia-serotonin relationship. Among nations, the United States is the leader in publications. King's College London is the institution with the highest number of publications, and H. Y. Meltzer is the most influential author. Growing trends in schizophrenia-serotonin research are personalised medicine, alternative medicine, transcranial magnetic stimulation, artificial intelligence, nervous system inflammation, brain-gut axis, and the gut microbiome. Conclusion Since 1950, there have been several fluctuations in the number of published studies related to schizophrenia and serotonin. We believe that the development of novel medications and treatments for schizophrenia will be increased in the future, as well as research into genetic risks, psychological factors, and cranial neuroimaging components. Future schizophrenia and serotonin research is likely to focus on personalised medicine, alternative therapies, novel pathogenesis of schizophrenia, and the use of emerging technologies such as artificial intelligence.
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Affiliation(s)
| | - Gael López-Pech
- School of Medicine, Educational Center Rodriguez Tamayo, Ticul, Yucatan, Mexico
| | - Francisco Jiménez-Trejo
- Cellular and Tissue Morphology Laboratory, National Institute of Pediatrics, Mexico City, Mexico
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Zhang X, Xu X, Zhang L. Serotonergic modulation of olfactory processing in locust antennae. CURRENT OPINION IN INSECT SCIENCE 2024:101238. [PMID: 39043333 DOI: 10.1016/j.cois.2024.101238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 07/16/2024] [Accepted: 07/18/2024] [Indexed: 07/25/2024]
Abstract
Insects have sophisticated olfactory systems that enable them to detect and respond to complex exogenous chemical cues. The encoding mechanisms of these chemical signals have been studied both in their peripheral and central nervous systems (CNS). While various neuromodulators have been shown to play significant roles in olfactory processing within the antennal lobes of the brain, their roles in peripheral olfactory sensory systems, such as the antennae, are less understood. This review focuses on the role of serotonin (5-HT) receptor in the locust antenna, specifically the modulatory function of the serotonin receptor2 on odour inputs. We also review recent studies on the modulation of olfaction in the peripheral nervous systems of insects and discuss potential directions for future research on the role of neuromodulators in insect peripheral olfactory systems.
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Affiliation(s)
- Xinyang Zhang
- Xianghu Laboratory, Hangzhou, Zhejiang Province, China
| | - Xiao Xu
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan, Shandong Province, China
| | - Long Zhang
- Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan, Shandong Province, China
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Milešević M, Matić Jelić I, Rumenović V, Ivanjko N, Vukičević S, Bordukalo-Nikšić T. The Influence of BMP6 on Serotonin and Glucose Metabolism. Int J Mol Sci 2024; 25:7842. [PMID: 39063084 PMCID: PMC11276723 DOI: 10.3390/ijms25147842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 07/11/2024] [Accepted: 07/15/2024] [Indexed: 07/28/2024] Open
Abstract
Previous studies have suggested a potential role of bone morphogenetic protein 6 (BMP6) in glucose metabolism, which also seems to be regulated by serotonin (5-hydroxytryptamine, 5HT), a biogenic amine with multiple roles in the organism. In this study, we explored possible interactions between BMP6, serotonin, and glucose metabolism regulation. The effect of BMP6 or 5HT on pancreatic β-cells has been studied in vitro using the INS-1 832/13 rat insulinoma cell line. Studies in vivo have been performed on mice with the global deletion of the Bmp6 gene (BMP6-/-) and included glucose and insulin tolerance tests, gene expression studies using RT-PCR, immunohistochemistry, and ELISA analyses. We have shown that BMP6 and 5HT treatments have the opposite effect on insulin secretion from INS-1 cells. The effect of BMP6 on the 5HT system in vivo depends on the tissue studied, with no observable systemic effect on peripheral 5HT metabolism. BMP6 deficiency does not cause diabetic changes, although a mild difference in insulin tolerance test between BMP6-/- and WT mice was observed. In conclusion, BMP6 does not directly influence glucose metabolism, but there is a possibility that its deletion causes slowly developing changes in glucose and serotonin metabolism, which would become more expressed with ageing.
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Affiliation(s)
| | | | | | | | | | - Tatjana Bordukalo-Nikšić
- Laboratory for Mineralized Tissues, Center for Translational and Clinical Research, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (M.M.); (I.M.J.); (V.R.); (N.I.); (S.V.)
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Jiang L, Han D, Hao Y, Song Z, Sun Z, Dai Z. Linking serotonin homeostasis to gut function: Nutrition, gut microbiota and beyond. Crit Rev Food Sci Nutr 2024; 64:7291-7310. [PMID: 36861222 DOI: 10.1080/10408398.2023.2183935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
Serotonin (5-HT) produced by enterochromaffin (EC) cells in the digestive tract is crucial for maintaining gut function and homeostasis. Nutritional and non-nutritional stimuli in the gut lumen can modulate the ability of EC cells to produce 5-HT in a temporal- and spatial-specific manner that toning gut physiology and immune response. Of particular interest, the interactions between dietary factors and the gut microbiota exert distinct impacts on gut 5-HT homeostasis and signaling in metabolism and the gut immune response. However, the underlying mechanisms need to be unraveled. This review aims to summarize and discuss the importance of gut 5-HT homeostasis and its regulation in maintaining gut metabolism and immune function in health and disease with special emphasis on different types of nutrients, dietary supplements, processing, and gut microbiota. Cutting-edge discoveries in this area will provide the basis for the development of new nutritional and pharmaceutical strategies for the prevention and treatment of serotonin homeostasis-related gut and systematic disorders and diseases.
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Affiliation(s)
- Lili Jiang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China
| | - Dandan Han
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China
| | - Youling Hao
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China
| | - Zhuan Song
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China
| | - Zhiyuan Sun
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China
| | - Zhaolai Dai
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China
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Fabbri E, Balbi T, Canesi L. Neuroendocrine functions of monoamines in invertebrates: Focus on bivalve molluscs. Mol Cell Endocrinol 2024; 588:112215. [PMID: 38548145 DOI: 10.1016/j.mce.2024.112215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 03/03/2024] [Accepted: 03/21/2024] [Indexed: 04/01/2024]
Abstract
Monoamines (MA) such as serotonin, catecholamines (dopamine, norepinephrine, epinephrine), and trace amines (octopamine, tyramine), are neurotransmitters and neuroendocrine modulators in vertebrates, that contribute to adaptation to the environment. Although MA are conserved in evolution, information is still fragmentary in invertebrates, given the diversity of phyla and species. However, MA are crucial in homeostatic processes in these organisms, where the absence of canonical endocrine glands in many groups implies that the modulation of physiological functions is essentially neuroendocrine. In this review, we summarize available information on MA systems in invertebrates, with focus on bivalve molluscs, that are widespread in different aquatic environments, where they are subjected to a variety of environmental stimuli. Available data are reviewed on the presence of the different MA in bivalve tissues, their metabolism, target cells, signaling pathways, and the physiological functions modulated in larval and adult stages. Research gaps and perspectives are highlighted, in order to enrich the framework of knowledge on MA neuroendocrine functions, and on their role in adaptation to ongoing and future environmental changes.
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Affiliation(s)
- Elena Fabbri
- Department of Biological, Geological, and Environmental Sciences, University of Bologna, Via Sant'Alberto 163, 48123, Ravenna, Italy; National Biodiversity Future Center, 90133, Palermo, Italy.
| | - Teresa Balbi
- Department of Earth, Environment and Life Sciences, University of Genoa, Corso Europa 26, 16132, Genoa, Italy; National Biodiversity Future Center, 90133, Palermo, Italy
| | - Laura Canesi
- Department of Earth, Environment and Life Sciences, University of Genoa, Corso Europa 26, 16132, Genoa, Italy; National Biodiversity Future Center, 90133, Palermo, Italy
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9
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Yoo YM, Joo SS. Serotonin Influences Insulin Secretion in Rat Insulinoma INS-1E Cells. Int J Mol Sci 2024; 25:6828. [PMID: 38999937 PMCID: PMC11241493 DOI: 10.3390/ijms25136828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 06/15/2024] [Accepted: 06/19/2024] [Indexed: 07/14/2024] Open
Abstract
Serotonin or 5-hydroxytryptamine (5-HT) is a monoamine that plays a critical role in insulin secretion, energy metabolism, and mitochondrial biogenesis. However, the action of serotonin in insulin production and secretion by pancreatic β cells has not yet been elucidated. Here, we investigated how exogenous nanomolar serotonin concentrations regulate insulin synthesis and secretion in rat insulinoma INS-1E cells. Nanomolar serotonin concentrations (10 and 50 nM) significantly increased insulin protein expression above the constant levels in untreated control cells and decreased insulin protein levels in the media. The reductions in insulin protein levels in the media may be associated with ubiquitin-mediated protein degradation. The levels of membrane vesicle trafficking-related proteins including Rab5, Rab3A, syntaxin6, clathrin, and EEA1 proteins were significantly decreased by serotonin treatment compared to the untreated control cells, whereas the expressions of Rab27A, GOPC, and p-caveolin-1 proteins were significantly reduced by serotonin treatment. In this condition, serotonin receptors, Gαq-coupled 5-HT2b receptor (Htr2b), and ligand-gated ion channel receptor Htr3a were significantly decreased by serotonin treatment. To confirm the serotonylation of Rab3A and Rab27A during insulin secretion, we investigated the protein levels of Rab3A and Rab27A, in which transglutaminase 2 (TGase2) serotonylated Rab3A but not Rab27A. The increases in ERK phosphorylation levels were consistent with increases in the expression of p-Akt. Also, the expression level of the Bcl-2 protein was significantly increased by 50 and 100 nM serotonin treatment compared to the untreated control cells, whereas the levels of Cu/Zn-SOD and Mn-SOD proteins decreased. These results indicate that nanomolar serotonin treatment regulates the insulin protein level but decreases this level in media through membrane vesicle trafficking-related proteins (Rab5, Rab3A, syntaxin6, clathrin, and EEA1), the Akt/ERK pathway, and Htr2b/Htr3a in INS-1E cells.
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Affiliation(s)
- Yeong-Min Yoo
- East Coast Life Sciences Institute, College of Life Science, Gangneung-Wonju National University, Gangneung 25457, Republic of Korea
- Department of Marine Bioscience, College of Life Science, Gangneung-Wonju National University, Gangneung 25457, Republic of Korea
| | - Seong Soo Joo
- Department of Marine Bioscience, College of Life Science, Gangneung-Wonju National University, Gangneung 25457, Republic of Korea
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10
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Ekici Ö, Arıkan Söylemez ES. The association of T102C (rs6313) polymorphism in the 5-HT2A receptor gene with temporomandibular disorders and anxiety in a group of Turkish population. Cranio 2024:1-9. [PMID: 38899594 DOI: 10.1080/08869634.2024.2369729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
OBJECTIVE To investigate the relationship between T102C (rs6313) polymorphism in the 5-hydroxytryptamine receptor-2A (5HTR2A) gene and temporomandibular disorder (TMD) and anxiety. METHODS This observational case-control study included 80 patients and 70 healthy controls. TMD was diagnosed using the criteria for TMD (DC/TMD). Anxiety was assessed with the Beck anxiety scale. A genotyping study of HTRR2A T102C (rs6313) gene polymorphism was performed from genomic DNA isolated from blood. RESULTS The TMD group had higher anxiety scores than the control group (p < .05). The TMD group was similar to the control group regarding genotype and allele frequencies. However, the polymorphic CC genotype was more common in those with high anxiety (p < .05). CONCLUSION There was no clear evidence of an association between TMD and the T102C polymorphism in HTR2A and TMD. However, anxiety is closely related to the T102C polymorphism in HTR2A.
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Affiliation(s)
- Ömer Ekici
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
| | - Evrim Suna Arıkan Söylemez
- Department of Medical Biology, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
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Akotkar L, Aswar U, Ganeshpurkar A, Rathod K, Bagad P, Gurav S. Phytoconstituents Targeting the Serotonin 5-HT 3 Receptor: Promising Therapeutic Strategies for Neurological Disorders. ACS Pharmacol Transl Sci 2024; 7:1694-1710. [PMID: 38898946 PMCID: PMC11184608 DOI: 10.1021/acsptsci.4c00084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 05/17/2024] [Accepted: 05/21/2024] [Indexed: 06/21/2024]
Abstract
The 5-hydroxytryptamine-3 receptor (5-HT3R), a subtype of serotonin receptor, is a ligand-gated ion channel crucial in mediating fast synaptic transmission in the central and peripheral nervous systems. This receptor significantly influences various neurological activities, encompassing neurotransmission, mood regulation, and cognitive processing; hence, it may serve as an innovative target for neurological disorders. Multiple studies have revealed promising results regarding the beneficial effects of these phytoconstituents and extracts on conditions such as nausea, vomiting, neuropathic pain depression, anxiety, Alzheimer's disease, cognition, epilepsy, sleep, and dyskinesia via modulation of 5-HT3R in the pathophysiology of neurological disorder. The review delves into a detailed exploration of in silico, in vitro, and in vivo studies and clinical studies that discussed phytoconstituents acting on 5-HT3R and attenuates difficulties in neurological diseases. The diverse mechanisms by which plant-derived phytoconstituents influence 5-HT3R activity offer exciting avenues for developing innovative therapeutic interventions. Besides producing an agonistic or antagonistic effect, some phytoconstituents exert modulatory effects on 5-HT3R activity through multifaceted mechanisms. These include γ-aminobutyric acid and cholinergic neuronal pathways, interactions with neurokinin (NK)-1, NK2, serotonergic, and γ-aminobutyric acid(GABA)ergic systems, dopaminergic influences, and mediation of calcium ions release and inflammatory cascades. Notably, the phytoconstituent's capacity to reduce oxidative stress has also emerged as a significant factor contributing to their modulatory role. Despite the promising implications, there is currently a dearth of exploration needed to understand the effect of phytochemicals on the 5-HT3R. Comprehensive preclinical and clinical research is of the utmost importance to broaden our knowledge of the potential therapeutic benefits associated with these substances.
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Affiliation(s)
- Likhit Akotkar
- Department
of Pharmacology, Poona College of Pharmacy,
Bharati Vidyapeeth (Deemed to be University), Pune 411038, India
| | - Urmila Aswar
- Department
of Pharmacology, Poona College of Pharmacy,
Bharati Vidyapeeth (Deemed to be University), Pune 411038, India
| | - Ankit Ganeshpurkar
- Department
of Pharmaceutical Chemistry, Poona College
of Pharmacy, Bharati Vidyapeeth (Deemed to be University), Pune411038, India
| | - Kundlik Rathod
- Department
of Pharmacology, Poona College of Pharmacy,
Bharati Vidyapeeth (Deemed to be University), Pune 411038, India
| | - Pradnya Bagad
- Department
of Pharmacology, Poona College of Pharmacy,
Bharati Vidyapeeth (Deemed to be University), Pune 411038, India
| | - Shailendra Gurav
- Department
of Pharmacognosy, Goa College of Pharmacy, Goa University, Goa 403001, India
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12
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Yuan M, Leslie FM. Nicotine and fluoxetine alter adolescent dopamine-mediated behaviors via 5-HT 1A receptor activation. Front Psychiatry 2024; 15:1380123. [PMID: 38919632 PMCID: PMC11196788 DOI: 10.3389/fpsyt.2024.1380123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 05/09/2024] [Indexed: 06/27/2024] Open
Abstract
Introduction Abuse or misuse of tobacco, e-cigarettes, or antidepressants may have serious clinical consequences during adolescence, a sensitive period during brain development when the distinct neurobiology of adolescent serotonin (5-HT) and dopamine (DA) systems create unique behavioral vulnerabilities to drugs of abuse. Methods Using a pharmacological approach, we modeled the behavioral and neurochemical effects of subchronic (4-day) nicotine (60µg/kg, i.v.) or fluoxetine (1mg/kg, i.v.) exposure in adolescent and adult male rats. Results Nicotine and fluoxetine significantly enhance quinpirole-induced locomotor activity and initial cocaine self-administration in adolescents, but not adults. These effects were blocked by serotonin 5-HT1A receptor antagonists, WAY-100,635 (100 µg/kg, i.v.) or S-15535 (300 µg/kg, i.v.). Neurochemical and anatomical autoradiographic analysis of 8-OH-DPAT-stimulated [35S]GTPγS reveal that prior exposure to nicotine and fluoxetine results in both overlapping and distinct effects on regional 5-HT1A receptor activity. Both fluoxetine and nicotine enhance adolescent 5-HT1A receptor activity in the primary motor cortex (M1), whereas fluoxetine alone targets prefrontal cortical neurocircuitry and nicotine alone targets the amygdala. Discussion Given their different pharmacological profiles, comparison between WAY-100,635 and S-15535 indicates that postsynaptic 5-HT1A receptors mediate the behavioral effects of prior nicotine and fluoxetine exposure. In addition, within the adolescent M1, maladaptive changes in 5-HT signaling and 5-HT1A activity after nicotine or fluoxetine exposure may potentiate hyper-responsiveness to dopaminergic drugs and prime adolescent vulnerability for future substance abuse.
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Affiliation(s)
- Menglu Yuan
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University of California Irvine (UCI), Irvine, CA, United States
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Giorgioni G, Bonifazi A, Botticelli L, Cifani C, Matteucci F, Micioni Di Bonaventura E, Micioni Di Bonaventura MV, Giannella M, Piergentili A, Piergentili A, Quaglia W, Del Bello F. Advances in drug design and therapeutic potential of selective or multitarget 5-HT1A receptor ligands. Med Res Rev 2024. [PMID: 38808959 DOI: 10.1002/med.22049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/14/2024] [Accepted: 05/03/2024] [Indexed: 05/30/2024]
Abstract
5-HT1A receptor (5-HT1A-R) is a serotoninergic G-protein coupled receptor subtype which contributes to several physiological processes in both central nervous system and periphery. Despite being the first 5-HT-R identified, cloned and studied, it still represents a very attractive target in drug discovery and continues to be the focus of a myriad of drug discovery campaigns due to its involvement in numerous neuropsychiatric disorders. The structure-activity relationship studies (SAR) performed over the last years have been devoted to three main goals: (i) design and synthesis of 5-HT1A-R selective/preferential ligands; (ii) identification of 5-HT1A-R biased agonists, differentiating pre- versus post-synaptic agonism and signaling cellular mechanisms; (iii) development of multitarget compounds endowed with well-defined poly-pharmacological profiles targeting 5-HT1A-R along with other serotonin receptors, serotonin transporter (SERT), D2-like receptors and/or enzymes, such as acetylcholinesterase and phosphodiesterase, as a promising strategy for the management of complex psychiatric and neurodegenerative disorders. In this review, medicinal chemistry aspects of ligands acting as selective/preferential or multitarget 5-HT1A-R agonists and antagonists belonging to different chemotypes and developed in the last 7 years (2017-2023) have been discussed. The development of chemical and pharmacological 5-HT1A-R tools for molecular imaging have also been described. Finally, the pharmacological interest of 5-HT1A-R and the therapeutic potential of ligands targeting this receptor have been considered.
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Affiliation(s)
- Gianfabio Giorgioni
- Medicinal Chemistry Unit, School of Pharmacy, University of Camerino, Camerino, Italy
| | - Alessandro Bonifazi
- Medicinal Chemistry Section, Molecular Targets and Medications Discovery Branch, National Institute on Drug Abuse - Intramural Research Program, National Institutes of Health, Baltimore, Maryland, USA
| | - Luca Botticelli
- Pharmacology Unit, School of Pharmacy, University of Camerino, Camerino, Italy
| | - Carlo Cifani
- Pharmacology Unit, School of Pharmacy, University of Camerino, Camerino, Italy
| | - Federica Matteucci
- Medicinal Chemistry Unit, School of Pharmacy, University of Camerino, Camerino, Italy
| | | | | | - Mario Giannella
- Medicinal Chemistry Unit, School of Pharmacy, University of Camerino, Camerino, Italy
| | | | - Alessia Piergentili
- Medicinal Chemistry Unit, School of Pharmacy, University of Camerino, Camerino, Italy
| | - Wilma Quaglia
- Medicinal Chemistry Unit, School of Pharmacy, University of Camerino, Camerino, Italy
| | - Fabio Del Bello
- Medicinal Chemistry Unit, School of Pharmacy, University of Camerino, Camerino, Italy
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14
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Malheiros J, Amaral C, da Silva LS, Guinsburg R, Covolan L. Neonatal nociceptive stimulation results in pain sensitization, reduction of hippocampal 5-HT 1A receptor, and p-CREB expression in adult female rats. Behav Brain Res 2024; 466:114975. [PMID: 38552745 DOI: 10.1016/j.bbr.2024.114975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/13/2024]
Abstract
Painful invasive procedures are often performed on newborns admitted to intensive care units (ICU). The acute and long-term effects caused by these stimuli can be investigated in animal models, such as newborn rats. Previous studies have shown that animals subjected to nociceptive stimuli in the neonatal period show sex-specific behavioral changes such as signs of anxiety or depression. Under the same conditions, neonatal stimuli also provoke an increase in the rate of neurogenesis and cell activation in the hippocampal dentate gyrus. So, this study aims to identify the possible roles of central monoamines, receptor expression (5-HT1A), and signaling factors (p-CREB) underlying the long-term effects of neonatal nociceptive stimulation. For this, noxious stimulation was induced by intra-plantar injection of Complete Freund´s adjuvant (CFA) on the postnatal day 1 (P1) or 8 (P8). Control animals were not stimulated. On P75 the behavioral tests were conducted (hotplate and elevated plus maze), followed by sacrifice and molecular studies. Our results showed that neonatal nociceptive stimulation alters pain sensitization specially in females, while stimulation on P1 increases pain threshold, P8-stimulated animals respond with reduced pain threshold (P < 0.001). Hippocampal expression of 5-HT1A receptor and p-CREB were reduced in P8 F group (P < 0.001) in opposition to the increased utilization rate of dopamine and serotonin in this group (P < 0.05). This study shows sex- and age-specific responses of signaling pathways within the hippocampus accompanied by altered behavioral repertoire, at long-term after neonatal painful stimulation.
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Affiliation(s)
- Jackeline Malheiros
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil
| | - Cristiane Amaral
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil
| | - Luiz Severino da Silva
- Departamento de Micro Imuno Parasitologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil
| | - Ruth Guinsburg
- Disciplina de Pediatria Neonatal, Departamento de Pediatria, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil
| | - Luciene Covolan
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, SP 04023-062, Brazil.
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15
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Cheng Y, Kou Y, Wang J, Wang Y, Rong W, Han H, Zhang G. 5-Hydroxytryptamine 4 Receptor Agonist Attenuates Diabetic Enteric Neuropathy through Inhibition of the Receptor-Interacting Protein Kinase 3 Pathway. THE AMERICAN JOURNAL OF PATHOLOGY 2024; 194:785-795. [PMID: 38311118 DOI: 10.1016/j.ajpath.2024.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 01/09/2024] [Accepted: 01/19/2024] [Indexed: 02/06/2024]
Abstract
Necroptosis, considered as a form of programmed cell death, contributes to neural loss. The 5-hydroxytryptamine 4 receptor (5-HT4R) is involved in neurogenesis in the enteric nervous system. However, whether the activation of 5-HT4R can alleviate diabetic enteric neuropathy by inhibiting receptor-interacting protein kinase 3 (RIPK3)-mediated necroptosis is unclear. This study aimed to explore the beneficial effects of 5-HT4R agonist on enteric neuropathy in a mouse model of diabetes and the mechanisms underlying these effects. Diabetes developed neural loss in the colon of mice. 5-HT4Rs localized in submucosal and myenteric plexuses were confirmed. Administration of 5-HT4R agonist attenuated diabetes-induced colonic hypomotility and neural loss of the colon in mice. Remarkably, RIPK3, phosphorylated RIPK3, and its downstream target mixed lineage kinase domain-like protein (MLKL), two key proteins regulating necroptosis, were significantly up-regulated in the colon of diabetic mice. Treatment with 5-HT4R agonist appeared to inhibit diabetes-induced elevation of RIPK3, phosphorylated RIPK3, and MLKL in the colon of mice. Diabetes-induced up-regulation of MLKL in both the mucosa and the muscularis of the colon was prevented by Ripk3 deletion. Moreover, diabetes-evoked neural loss and delayed colonic transit were significantly inhibited by Ripk3 removal. These findings suggest that activation of 5-HT4Rs could potentially provide a protective effect against diabetic enteric neuropathy by suppressing RIPK3-mediated necroptosis.
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Affiliation(s)
- Yingying Cheng
- Songjiang Research Institute, Shanghai Songjing District Central Hospital, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yueting Kou
- Songjiang Research Institute, Shanghai Songjing District Central Hospital, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Juan Wang
- Songjiang Research Institute, Shanghai Songjing District Central Hospital, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yue Wang
- Songjiang Research Institute, Shanghai Songjing District Central Hospital, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Weifang Rong
- Songjiang Research Institute, Shanghai Songjing District Central Hospital, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hongxiu Han
- Department of Pathology, Tongji Hospital, Tongji University, Shanghai, China.
| | - Guohua Zhang
- Songjiang Research Institute, Shanghai Songjing District Central Hospital, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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16
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Wright NJD. A review of the direct targets of the cannabinoids cannabidiol, Δ9-tetrahydrocannabinol, N-arachidonoylethanolamine and 2-arachidonoylglycerol. AIMS Neurosci 2024; 11:144-165. [PMID: 38988890 PMCID: PMC11230856 DOI: 10.3934/neuroscience.2024009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 04/17/2024] [Accepted: 04/19/2024] [Indexed: 07/12/2024] Open
Abstract
Marijuana has been used by humans for thousands of years for both medicinal and recreational purposes. This included the treatment of pain, inflammation, seizures, and nausea. In the 1960s, the structure of the principal psychoactive ingredient Δ9-tetrahydrocannabinol was determined, and over the next few decades, two cannabinoid receptors were characterized along with the human endocannabinoid system and what it affects. This includes metabolism, the cardiovascular and reproductive systems, and it is involved in such conditions as inflammation, cancer, glaucoma, and liver and musculoskeletal disorders. In the central nervous system, the endocannabinoid system has been linked to appetite, learning, memory, and conditions such as depression, anxiety, schizophrenia, stroke, multiple sclerosis, neurodegeneration, addiction, and epilepsy. It was the profound effectiveness of cannabidiol, a non-psychoactive ingredient of marijuana, to relieve the symptoms of Dravet syndrome, a severe form of childhood epilepsy, that recently helped spur marijuana research. This has helped substantially to change society's attitude towards this potential source of useful drugs. However, research has also revealed that the actions of endocannabinoids, such as anandamide and 2-arachidonoylglycerol, and the phytocannabinoids, tetrahydrocannabinol and cannabidiol, were not just due to interactions with the two cannabinoid receptors but by acting directly on many other targets including various G-protein receptors and cation channels, such as the transient receptor potential channels for example. This mini-review attempts to survey the effects of these 4 important cannabinoids on these currently identified targets.
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17
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Saednia S, Emami S, Moslehi M, Hosseinimehr SJ. Insights into the development of 99mTc-radioligands for serotonergic receptors imaging: Synthesis, labeling, In vitro, and In vivo studies. Eur J Med Chem 2024; 270:116349. [PMID: 38555856 DOI: 10.1016/j.ejmech.2024.116349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 04/02/2024]
Abstract
Serotonergic (5-hydroxytryptamine; 5-HT) receptors play critical roles in neurological and psychological disorders such as schizophrenia, anxiety, depression, and Alzheimer's diseases. Therefore, it is particularly important to develop novel radioligands or modify the existing ones to identify the serotonergic receptors involved in psychiatric disorders. Among the 16 subtypes of serotonergic systems, only technetium-99m based radiopharmaceuticals have been evaluated for serotonin-1A (5-HT1A), serotonin-2A (5-HT2A), 5-HT1A/7 heterodimers and serotonin receptor neurotransmitter (SERT). This review focuses on recent efforts in the design, synthesis and evaluation of 99mTc-radioligands used for single photon emission computerized tomography (SPECT) imaging of serotonergic (5-HT) receptors. Additionally, the discussion will cover aspects such as chemical structure, in vitro/vivo stability, affinity toward serotonin receptors, blood-brain barrier permeation (BBB), and biodistribution study.
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Affiliation(s)
- Shahnaz Saednia
- Farabi Hospital, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Radiopharmacy, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Saeed Emami
- Department of Medicinal Chemistry and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Masoud Moslehi
- Department of Medical Physics, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Seyed Jalal Hosseinimehr
- Department of Radiopharmacy, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran.
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18
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Huang X, Choi S, Wu W, Shahi PK, Lee JH, Hong C, Jun JY. 5-Hydroxytryptamine Enhances the Pacemaker Activity of Interstitial Cells of Cajal in Mouse Colon. Int J Mol Sci 2024; 25:3997. [PMID: 38612808 PMCID: PMC11012597 DOI: 10.3390/ijms25073997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 04/02/2024] [Accepted: 04/02/2024] [Indexed: 04/14/2024] Open
Abstract
We examined the localization of the 5-hydroxytryptamine (5-HT) receptor and its effects on mouse colonic interstitial cells of Cajal (ICCs) using electrophysiological techniques. Treatment with 5-HT increased the pacemaker activity in colonic ICCs with depolarization of membrane potentials in a dose-dependent manner. Hyperpolarization-activated cyclic nucleotide-gated (HCN) channel blockers blocked pacemaker activity and 5-HT-induced effects. Moreover, an adenylate cyclase inhibitor inhibited 5-HT-induced effects, and cell-permeable 8-bromo-cAMP increased the pacemaker activity. Various agonists of the 5-HT receptor subtype were working in colonic ICCs, including the 5-HT4 receptor. In small intestinal ICCs, 5-HT depolarized the membrane potentials transiently. Adenylate cyclase inhibitors or HCN blockers did not show any influence on 5-HT-induced effects. Anoctamin-1 (ANO1) or T-type Ca2+ channel blockers inhibited the pacemaker activity of colonic ICCs and blocked 5-HT-induced effects. A tyrosine protein kinase inhibitor inhibited pacemaker activity in colonic ICCs under controlled conditions but did not show any influence on 5-HT-induced effects. Among mitogen-activated protein kinase (MAPK) inhibitors, a p38 MAPK inhibitor inhibited 5-HT-induced effects on colonic ICCs. Thus, 5-HT's effect on pacemaker activity in small intestinal and colonic ICCs has excitatory but variable patterns. ANO1, T-type Ca2+, and HCN channels are involved in 5-HT-induced effects, and MAPKs are involved in 5-HT effects in colonic ICCs.
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Affiliation(s)
- Xingyou Huang
- Department of Physiology, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea; (X.H.); (S.C.); (W.W.); (P.K.S.); (C.H.)
| | - Seok Choi
- Department of Physiology, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea; (X.H.); (S.C.); (W.W.); (P.K.S.); (C.H.)
| | - Wenhao Wu
- Department of Physiology, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea; (X.H.); (S.C.); (W.W.); (P.K.S.); (C.H.)
| | - Pawan Kumar Shahi
- Department of Physiology, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea; (X.H.); (S.C.); (W.W.); (P.K.S.); (C.H.)
| | - Jun Hyung Lee
- Department of Internal Medicine, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea;
| | - Chansik Hong
- Department of Physiology, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea; (X.H.); (S.C.); (W.W.); (P.K.S.); (C.H.)
| | - Jae Yeoul Jun
- Department of Physiology, College of Medicine, Chosun University, Gwangju 61452, Republic of Korea; (X.H.); (S.C.); (W.W.); (P.K.S.); (C.H.)
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19
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Matheson GJ, Zanderigo F, Miller JM, Bartlett EA, Mann JJ, Ogden RT. PET Imaging of the Serotonin 1A Receptor in Major Depressive Disorder: Hierarchical Multivariate Analysis of [ 11C]WAY100635 Overcomes Outcome Measure Discrepancies. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.12.584569. [PMID: 38559101 PMCID: PMC10980040 DOI: 10.1101/2024.03.12.584569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The serotonin 1A receptor has been linked to both the pathophysiology of major depressive disorder (MDD) and the antidepressant action of serotonin reuptake inhibitors. Most PET studies of the serotonin 1A receptor in MDD used the receptor antagonist radioligand, [carbonyl-11C]WAY100635; however the interpretation of the combined results has been contentious owing to reports of higher or lower binding in MDD with different outcome measures. The reasons for these divergent results originate from several sources, including properties of the radiotracer itself, which complicate its quantification and interpretation; as well as from previously reported differences between MDD and healthy volunteers in both reference tissue binding and plasma free fraction, which are typically assumed not to differ. Recently, we have developed two novel hierarchical multivariate methods which we validated for the quantification and analysis of [11C]WAY100635, which show better accuracy and inferential efficiency compared to standard analysis approaches. Importantly, these new methods should theoretically be more resilient to many of the factors thought to have caused the discrepancies observed in previous studies. We sought to apply these methods in the largest [11C]WAY100635 sample to date, consisting of 160 individuals, including 103 MDD patients, of whom 50 were not-recently-medicated and 53 were antidepressant-exposed, as well as 57 healthy volunteers. While the outcome measure discrepancies were substantial using conventional univariate analysis, our multivariate analysis techniques instead yielded highly consistent results across PET outcome measures and across pharmacokinetic models, with all approaches showing higher serotonin 1A autoreceptor binding potential in the raphe nuclei of not-recently-medicated MDD patients relative to both healthy volunteers and antidepressant-exposed MDD patients. Moreover, with the additional precision of estimates afforded by this approach, we can show that while binding is also higher in projection areas in this group, these group differences are approximately half of those in the raphe nuclei, which are statistically distinguishable from one another. These results are consistent with the biological role of the serotonin 1A autoreceptor in the raphe nuclei in regulating serotonin neuron firing and release, and with preclinical and clinical evidence of deficient serotonin activity in MDD due to over expression of autoreceptors resulting from genetic and/or epigenetic effects. These results are also consistent with downregulation of autoreceptors as a mechanism of action of selective serotonin reuptake inhibitors. In summary, the results using multivariate analysis approaches therefore demonstrate both face and convergent validity, and may serve to provide a resolution and consensus interpretation for the disparate results of previous studies examining the serotonin 1A receptor in MDD.
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Affiliation(s)
- Granville J. Matheson
- Department of Psychiatry, Columbia University, New York, 10032 NY, USA
- Department of Biostatistics, Columbia University Mailman School of Public Health, New York, 10032 NY, USA
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, 10032 NY, USA
- Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet and Stockholm County Council, Stockholm, SE-171 76, Sweden
| | - Francesca Zanderigo
- Department of Psychiatry, Columbia University, New York, 10032 NY, USA
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, 10032 NY, USA
| | - Jeffrey M. Miller
- Department of Psychiatry, Columbia University, New York, 10032 NY, USA
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, 10032 NY, USA
| | - Elizabeth A. Bartlett
- Department of Psychiatry, Columbia University, New York, 10032 NY, USA
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, 10032 NY, USA
| | - J. John Mann
- Department of Psychiatry, Columbia University, New York, 10032 NY, USA
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, 10032 NY, USA
| | - R. Todd Ogden
- Department of Psychiatry, Columbia University, New York, 10032 NY, USA
- Department of Biostatistics, Columbia University Mailman School of Public Health, New York, 10032 NY, USA
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, 10032 NY, USA
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20
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Raouf Z, Steinway SN, Scheese D, Lopez CM, Duess JW, Tsuboi K, Sampah M, Klerk D, El Baassiri M, Moore H, Tragesser C, Prindle T, Wang S, Wang M, Jang HS, Fulton WB, Sodhi CP, Hackam DJ. Colitis-Induced Small Intestinal Hypomotility Is Dependent on Enteroendocrine Cell Loss in Mice. Cell Mol Gastroenterol Hepatol 2024; 18:53-70. [PMID: 38438014 PMCID: PMC11127033 DOI: 10.1016/j.jcmgh.2024.02.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 03/06/2024]
Abstract
BACKGROUND & AIMS The abdominal discomfort experienced by patients with colitis may be attributable in part to the presence of small intestinal dysmotility, yet mechanisms linking colonic inflammation with small-bowel motility remain largely unexplored. We hypothesize that colitis results in small intestinal hypomotility owing to a loss of enteroendocrine cells (EECs) within the small intestine that can be rescued using serotonergic-modulating agents. METHODS Male C57BL/6J mice, as well as mice that overexpress (EECOVER) or lack (EECDEL) NeuroD1+ enteroendocrine cells, were exposed to dextran sulfate sodium (DSS) colitis (2.5% or 5% for 7 days) and small intestinal motility was assessed by 70-kilodalton fluorescein isothiocyanate-dextran fluorescence transit. EEC number and differentiation were evaluated by immunohistochemistry, terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick-end labeling staining, and quantitative reverse-transcriptase polymerase chain reaction. Mice were treated with the 5-hydroxytryptamine receptor 4 agonist prucalopride (5 mg/kg orally, daily) to restore serotonin signaling. RESULTS DSS-induced colitis was associated with a significant small-bowel hypomotility that developed in the absence of significant inflammation in the small intestine and was associated with a significant reduction in EEC density. EEC loss occurred in conjunction with alterations in the expression of key serotonin synthesis and transporter genes, including Tph1, Ddc, and Slc6a4. Importantly, mice overexpressing EECs revealed improved small intestinal motility, whereas mice lacking EECs had worse intestinal motility when exposed to DSS. Finally, treatment of DSS-exposed mice with the 5-hydroxytryptamine receptor 4 agonist prucalopride restored small intestinal motility and attenuated colitis. CONCLUSIONS Experimental DSS colitis induces significant small-bowel dysmotility in mice owing to enteroendocrine loss that can be reversed by genetic modulation of EEC or administering serotonin analogs, suggesting novel therapeutic approaches for patients with symptomatic colitis.
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Affiliation(s)
- Zachariah Raouf
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Steve N Steinway
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Daniel Scheese
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Carla M Lopez
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Johannes W Duess
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Koichi Tsuboi
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Maame Sampah
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Daphne Klerk
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Mahmoud El Baassiri
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Hannah Moore
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Cody Tragesser
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Thomas Prindle
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Sanxia Wang
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Menghan Wang
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Hee-Seong Jang
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - William B Fulton
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Chhinder P Sodhi
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.
| | - David J Hackam
- Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.
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21
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Biswas M, Vanwong N, Sukasem C. Pharmacogenomics and non-genetic factors affecting drug response in autism spectrum disorder in Thai and other populations: current evidence and future implications. Front Pharmacol 2024; 14:1285967. [PMID: 38375208 PMCID: PMC10875059 DOI: 10.3389/fphar.2023.1285967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 12/26/2023] [Indexed: 02/21/2024] Open
Abstract
Autism spectrum disorder (ASD) may affect family and social life profoundly. Although there is no selective pharmacotherapy for ASD, the Food and Drug Administration (FDA) has recommended risperidone/aripiprazole to treat the associated symptoms of ASD, such as agitation/irritability. Strong associations of some pharmacokinetic/pharmacodynamic gene variants, e.g., CYP2D6 and DRD2, with risperidone-induced hyperprolactinemia have been found in children with ASD, but such strong genetic associations have not been found directly for aripiprazole in ASD. In addition to pharmacogenomic (PGx) factors, drug-drug interactions (DDIs) and possibly cumulative effects of DDIs and PGx may affect the safety or effectiveness of risperidone/aripiprazole, which should be assessed in future clinical studies in children with ASD. Reimbursement, knowledge, and education of healthcare professionals are the key obstacles preventing the successful implementation of ASD pharmacogenomics into routine clinical practice. The preparation of national and international PGx-based dosing guidelines for risperidone/aripiprazole based on robust evidence may advance precision medicine for ASD.
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Affiliation(s)
- Mohitosh Biswas
- Department of Pharmacy, University of Rajshahi, Rajshahi, Bangladesh
- Division of Pharmacogenomics and Personalized Medicine, Department of Pathology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
- Laboratory for Pharmacogenomics, Ramathibodi Hospital, Somdech Phra Debaratana Medical Center SDMC, Bangkok, Thailand
| | - Natchaya Vanwong
- Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand
- Cardiovascular Precision Medicine Research Group, Special Task Force of Activating Research (STAR), Chulalongkorn University, Bangkok, Thailand
| | - Chonlaphat Sukasem
- Division of Pharmacogenomics and Personalized Medicine, Department of Pathology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
- Laboratory for Pharmacogenomics, Ramathibodi Hospital, Somdech Phra Debaratana Medical Center SDMC, Bangkok, Thailand
- Pharmacogenomics and Precision Medicine Clinic, Bumrungrad Genomic Medicine Institute (BGMI), Bumrungrad International Hospital, Bangkok, Thailand
- Faculty of Pharmaceutical Sciences, Burapha University, Mueang, Thailand
- Department of Pharmacology and Therapeutics, MRC Centre for Drug Safety Science, Institute of Systems, Molecular, and Integrative Biology, University of Liverpool, Liverpool, United Kingdom
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22
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Mardanshahi A, Vaseghi S, Hosseinimehr SJ, Abedi SM, Molavipordanjani S. 99mTc(CO) 3-labeled 1-(2-Pyridyl)piperazine derivatives as radioligands for 5-HT 7 receptors. Ann Nucl Med 2024; 38:139-153. [PMID: 38032496 DOI: 10.1007/s12149-023-01885-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 10/30/2023] [Indexed: 12/01/2023]
Abstract
BACKGROUND The 5-hydroxytryptamine receptor (5-HTR) family includes seven classes of receptors. The 5-HT7R is the newest member of this family and contributes to different physiological and pathological processes. As a pathology, glioblastoma multiform (GBM) overexpresses 5-HT7R; hence, this study aims to develop radiolabeled aryl piperazine derivatives as 5-HT7R imaging agents. METHODS: Compounds 6 and 7 as 1-(3-nitropyridin-2-yl)piperazine derivatives were radiolabeled with fac-[99mTc(CO)3(H2O)3]+ and 99mTc(CO)3-[6] and 99mTc(CO)3-[7] were obtained with high radiochemical purity (RCP > 94%). The stability of the radiotracers was evaluated in both saline and mouse serum. Specific binding on different cell lines including U-87 MG, MCF-7, SKBR3, and HT-29 was performed. The biodistribution of these radiotracers was evaluated in normal and U-87 MG Xenografted models. Finally, 99mTc(CO)3-[6] and 99mTc(CO)3-[7] were applied for in vivo imaging in U-87 MG Xenografted models. RESULTS Specific binding study indicates that 99mTc(CO)3-[6] and 99mTc(CO)3-[7] can recognize 5-HT7R of U87-MG cell line. The biodistribution study in normal mice indicates that the brain uptake of 99mTc(CO)3-[6] and 99mTc(CO)3-[7] is the highest at 30 min post-injection (0.8 ± 0.25 and 0.64 ± 0.18%ID/g, respectively). The data of the biodistribution study in the U87-MG xenograft model revealed that these radiotracers could accumulate in the tumor site, and the highest tumor uptake was observed at 60 min post-injection (3.38 ± 0.65 and 3.27 ± 0.5%ID/g, respectively). The injection of pimozide can block the tumor's radiotracer uptake, indicating the binding of these radiotracers to the 5-HT7R. The imaging study in the xenograft model also confirms the biodistribution data. The acquired images clearly show the tumor site, and the tumor-to-muscle ratio for 99mTc(CO)3-[6] and 99mTc(CO)3-[7] at 60 min was 3.33 and 3.88, respectively. CONCLUSIONS: 99mTc(CO)3-[6] and 99mTc(CO)3-[7] can visualize tumor in the U87-MG xenograft model due to their affinity toward 5-HT7R.
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Affiliation(s)
- Alireza Mardanshahi
- Department of Radiology and Nuclear Medicine, Faculty of Medicine, Cardiovascular Research Center, Mazandaran University of Medical Sciences, Sari, Iran
| | - Samaneh Vaseghi
- Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Seyed Jalal Hosseinimehr
- Department of Radiopharmacy, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Seyed Mohammad Abedi
- Department of Radiology and Nuclear Medicine, Faculty of Medicine, Cardiovascular Research Center, Mazandaran University of Medical Sciences, Sari, Iran
| | - Sajjad Molavipordanjani
- Pharmaceutical Sciences Research Center, Hemoglobinopathy Institute, Mazandaran University of Medical Sciences, Sari, Iran.
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Mostafa T, Albeir M, Wober J, Abadi A, Salama I, Ahmed NS. Design, synthesis, and in-silico study of novel triarylethylene analogs with dual anti-estrogenic and serotonergic activity. Drug Dev Res 2024; 85:e22127. [PMID: 37877739 DOI: 10.1002/ddr.22127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/08/2023] [Accepted: 10/15/2023] [Indexed: 10/26/2023]
Abstract
Estrogen receptor is an important target in breast cancer. Serotonin receptors (5-HT2A and 5-HT2C , in particular) were investigated for a potential role in development and progression of breast cancer. Ligands that interact with estrogenic receptors influence the emotional state of females. Thus, designing selective estrogen receptor modulator (SERM) analogs with potential serotonergic activity is a plausible approach. The dual ligands can augment cytotoxic effect of SERMs, help in both physical and emotional menopausal symptom relief, enhance cognitive function and support bone health. Herein, we report triarylethylene analogs as potential candidates for treatment of breast cancer. Compound 2e showed (ERα relative β- galactosidase activity = 0.70), 5-HT2A (Ki = 0.97 µM), and 5-HT2C (Ki = 3.86 µM). It was more potent on both MCF-7 (GI50 = 0.27 µM) and on MDA-MB-231 (GI50 = 1.86 µM) compared to tamoxifen (TAM). Compound 4e showed 40 times higher antiproliferative activity on MCF-7 and 15 times on MDA-MBA compared to TAM. Compound 4e had higher average potency than TAM on all nine tested cell line panels. Our in-silico model revealed the binding interactions of compounds 2 and 2e in the three receptors; further structural modifications are suggested to optimize binding to the ERα, 5-HT2A , and 5-HT2C .
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Affiliation(s)
- Tammy Mostafa
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo, Egypt
| | - Miriam Albeir
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo, Egypt
| | - Jannette Wober
- Institute of Zoology, Faculty of Biology, Technische Universität Dresden, Dresden, Germany
| | - Ashraf Abadi
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo, Egypt
| | - Ismail Salama
- Department of Pharmaceutical Medicinal Chemistry, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt
| | - Nermin S Ahmed
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo, Egypt
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Chaturvedi S, Singh H, Agarwal V, Jaiswal A, Prasad N. Unravelling the role of Sildenafil and SB204741 in suppressing fibrotic potential of peritoneal fibroblasts obtained from PD patients. Front Pharmacol 2024; 14:1279330. [PMID: 38322704 PMCID: PMC10844479 DOI: 10.3389/fphar.2023.1279330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 12/20/2023] [Indexed: 02/08/2024] Open
Abstract
Introduction: Peritoneal fibrosis (PF) results in technique failure in peritoneal dialysis (PD) patients. Peritoneal fibroblasts are characterized by increase in the ACTA2 gene, responsible for alpha smooth muscle actin (α-SΜΑ), extracellular matrix (ECM) production, and inflammatory cytokines production, which are the are key mediators in the pathogenesis of PF. 5-hydroxytryptamine (5-HT; serotonin) induces ECM synthesis in fibroblasts in a transforming growth factor-beta 1 (TGF-β1) dependent manner. The purpose of our study was to identify the potential mechanism and role of sildenafil and 5HT2B receptor inhibitor (SB204741) combination in attenuating PD-associated peritoneal fibrosis. Methods: Studies were performed to determine the effect of TGF-β1, sildenafil, and SB204741 on human peritoneal fibroblasts (HPFBs) isolated from the parietal peritoneum of patients in long-term PD patients (n = 6) and controls (n = 6). HPFBs were incubated with TGF-β1 (10 ng/mL) for 1 h and later with TGF-β1 (10 ng/mL)/[sildenafil (10 µM) or SB204741 (1 µM)] and their combination for 24 h (post-treatment strategy). In the pre-treatment strategy, HPFBs were pre-treated with sildenafil (10 µM) or SB204741 (1 µM) and a combination of the two for 1 h and later with only TGF-β1 (10 ng/mL) for 24 h. Results: The anti-fibrotic effects of the combination of sildenafil and SB204741 were greater than that of each drug alone. In TGF-β1-stimulated HPFBs, pro-fibrotic genes (COL1A1, COL1A2, ACTA2, CTGF, FN1, and TGFB1) exhibited higher expression than in controls, which are crucial targets of sildenafil and SB204741 against peritoneal fibrosis. The synergistic approach played an anti-fibrotic role by regulating the pro- and anti-fibrotic gene responses as well as inflammatory cytokine responses. The combination treatment significantly attenuated peritoneal fibrosis, as evident by the almost complete amelioration of ACTA2 expression, restoration of anti-fibrotic genes (MMP2/TIMP1), and, at least, by reducing the expression of pro-inflammatory cytokines (IFN-γ, IL-4, IL-17, IL-1β, IL-6, TNF-α, and TGF-β1) along with an increase in IL-10 levels. Discussion: Taken together, the above research evidences that the combination of sildenafil and SB204741 may have therapeutic potential in suppressing peritoneal fibrosis due to peritoneal dialysis.
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Affiliation(s)
- Saurabh Chaturvedi
- Department of Clinical Immunology and Rheumatology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
- Department of Medical Laboratory Technology, School of Allied Health Sciences, Delhi Pharmaceutical Sciences and Research University, New Delhi, India
| | - Harshit Singh
- Department of Clinical Immunology and Rheumatology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
- Immuno Biology Lab, Translational Health Science and Technology Institute, Faridabad, Haryana, India
| | - Vikas Agarwal
- Department of Clinical Immunology and Rheumatology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Akhilesh Jaiswal
- Department of Nephrology and Renal Transplantation, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Narayan Prasad
- Department of Nephrology and Renal Transplantation, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
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O’Connell CJ, Brown RS, Peach TM, Traubert OD, Schwierling HC, Notorgiacomo GA, Robson MJ. Strain in the Midbrain: Impact of Traumatic Brain Injury on the Central Serotonin System. Brain Sci 2024; 14:51. [PMID: 38248266 PMCID: PMC10813794 DOI: 10.3390/brainsci14010051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/20/2023] [Accepted: 01/02/2024] [Indexed: 01/23/2024] Open
Abstract
Traumatic brain injury (TBI) is a pervasive public health crisis that severely impacts the quality of life of affected individuals. Like peripheral forms of trauma, TBI results from extraordinarily heterogeneous environmental forces being imparted on the cranial space, resulting in heterogeneous disease pathologies. This has made therapies for TBI notoriously difficult to develop, and currently, there are no FDA-approved pharmacotherapies specifically for the acute or chronic treatment of TBI. TBI is associated with changes in cognition and can precipitate the onset of debilitating psychiatric disorders like major depressive disorder (MDD), generalized anxiety disorder (GAD), and post-traumatic stress disorder (PTSD). Complicating these effects of TBI, FDA-approved pharmacotherapies utilized to treat these disorders often fail to reach the desired level of efficacy in the context of neurotrauma. Although a complicated association, decades of work have linked central serotonin (5-HT) neurotransmission as being involved in the etiology of a myriad of neuropsychiatric disorders, including MDD and GAD. 5-HT is a biogenic monoamine neurotransmitter that is highly conserved across scales of biology. Though the majority of 5-HT is isolated to peripheral sites such as the gastrointestinal (GI) tract, 5-HT neurotransmission within the CNS exerts exquisite control over diverse biological functions, including sleep, appetite and respiration, while simultaneously establishing normal mood, perception, and attention. Although several key studies have begun to elucidate how various forms of neurotrauma impact central 5-HT neurotransmission, a full determination of precisely how TBI disrupts the highly regulated dynamics of 5-HT neuron function and/or 5-HT neurotransmission has yet to be conceptually or experimentally resolved. The purpose of the current review is, therefore, to integrate the disparate bodies of 5-HT and TBI research and synthesize insight into how new combinatorial research regarding 5-HT neurotransmission and TBI may offer an informed perspective into the nature of TBI-induced neuropsychiatric complications.
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Affiliation(s)
- Christopher J. O’Connell
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, 231 Albert Sabin Way, Cincinnati, OH 45267, USA; (C.J.O.); (R.S.B.); (T.M.P.)
| | - Ryan S. Brown
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, 231 Albert Sabin Way, Cincinnati, OH 45267, USA; (C.J.O.); (R.S.B.); (T.M.P.)
| | - Taylor M. Peach
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, 231 Albert Sabin Way, Cincinnati, OH 45267, USA; (C.J.O.); (R.S.B.); (T.M.P.)
| | - Owen D. Traubert
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA;
| | - Hana C. Schwierling
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, 231 Albert Sabin Way, Cincinnati, OH 45267, USA; (C.J.O.); (R.S.B.); (T.M.P.)
| | | | - Matthew J. Robson
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, 231 Albert Sabin Way, Cincinnati, OH 45267, USA; (C.J.O.); (R.S.B.); (T.M.P.)
- Neuroscience Graduate Program, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA
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Sharma R, Kumarasamy M, Parihar VK, Ravichandiran V, Kumar N. Monoamine Oxidase: A Potential Link in Papez Circuit to Generalized Anxiety Disorders. CNS & NEUROLOGICAL DISORDERS DRUG TARGETS 2024; 23:638-655. [PMID: 37055898 DOI: 10.2174/1871527322666230412105711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 02/01/2023] [Accepted: 02/09/2023] [Indexed: 04/15/2023]
Abstract
Anxiety is a common mental illness that affects a large number of people around the world, and its treatment is often based on the use of pharmacological substances such as benzodiazepines, serotonin, and 5-hydroxytyrosine (MAO) neurotransmitters. MAO neurotransmitters levels are deciding factors in the biological effects. This review summarizes the current understanding of the MAO system and its role in the modulation of anxiety-related brain circuits and behavior. The MAO-A polymorphisms have been implicated in the susceptibility to generalized anxiety disorder (GAD) in several investigations. The 5-HT system is involved in a wide range of physiological and behavioral processes, involving anxiety, aggressiveness, stress reactions, and other elements of emotional intensity. Among these, 5-HT, NA, and DA are the traditional 5-HT neurons that govern a range of biological activities, including sleep, alertness, eating, thermoregulation, pains, emotion, and memory, as anticipated considering their broad projection distribution in distinct brain locations. The DNMTs (DNA methyltransferase) protein family, which increasingly leads a prominent role in epigenetics, is connected with lower transcriptional activity and activates DNA methylation. In this paper, we provide an overview of the current state of the art in the elucidation of the brain's complex functions in the regulation of anxiety.
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Affiliation(s)
- Ravikant Sharma
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, Hajipur, Vaishali- 844102, Bihar, India
| | - Murali Kumarasamy
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, Hajipur, Vaishali- 844102, Bihar, India
| | - Vipan Kumar Parihar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Hajipur, Vaishali-844102, Bihar, India
| | - V Ravichandiran
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, Hajipur, Vaishali- 844102, Bihar, India
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Hajipur, Vaishali-844102, Bihar, India
| | - Nitesh Kumar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Hajipur, Vaishali-844102, Bihar, India
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Mitroshina EV, Marasanova EA, Vedunova MV. Functional Dimerization of Serotonin Receptors: Role in Health and Depressive Disorders. Int J Mol Sci 2023; 24:16416. [PMID: 38003611 PMCID: PMC10671093 DOI: 10.3390/ijms242216416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/11/2023] [Accepted: 11/13/2023] [Indexed: 11/26/2023] Open
Abstract
Understanding the neurobiological underpinnings of depressive disorder constitutes a pressing challenge in the fields of psychiatry and neurobiology. Depression represents one of the most prevalent forms of mental and behavioral disorders globally. Alterations in dimerization capacity can influence the functional characteristics of serotonin receptors and may constitute a contributing factor to the onset of depressive disorders. The objective of this review is to consolidate the current understanding of interactions within the 5-HT receptor family and between 5-HT receptors and members of other receptor families. Furthermore, it aims to elucidate the role of such complexes in depressive disorders and delineate the mechanisms through which antidepressants exert their effects.
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Affiliation(s)
- Elena V. Mitroshina
- Institute of Biology and Biomedicine, Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Avenue, 603022 Nizhny Novgorod, Russia; (E.A.M.)
| | - Ekaterina A. Marasanova
- Institute of Biology and Biomedicine, Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Avenue, 603022 Nizhny Novgorod, Russia; (E.A.M.)
| | - Maria V. Vedunova
- Institute of Biology and Biomedicine, Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Avenue, 603022 Nizhny Novgorod, Russia; (E.A.M.)
- Faculty of Biology and Biotechnology, HSE University, St. Profsoyuznaya, 33, 117418 Moscow, Russia
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Kim H, Park KT, Jo H, Shin Y, Chung G, Ko SG, Jin YH, Kim W. The effect of ginger extract on cisplatin-induced acute anorexia in rats. Front Pharmacol 2023; 14:1267254. [PMID: 38026983 PMCID: PMC10665510 DOI: 10.3389/fphar.2023.1267254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 10/30/2023] [Indexed: 12/01/2023] Open
Abstract
Cisplatin is a platinum-based chemotherapeutic agent widely used to treat various cancers. However, several side effects have been reported in treated patients. Among these, acute anorexia is one of the most severe secondary effects. In this study, a single oral administration of 100 or 500 mg/kg ginger extract (GE) significantly alleviated the cisplatin-induced decrease in food intake in rats. However, these body weight and water intake decreases were reversed in the 100 mg/kg group rats. To elucidate the underlying mechanism of action, serotonin (5-HT) and 5-HT2C, 3A, and 4 receptors in the nodose ganglion of the vagus nerve were investigated. The results showed that cisplatin-induced increases in serotonin levels in both the blood and nodose ganglion tissues were significantly decreased by100 and 500 mg/kg of GE administration. On 5-HT receptors, 5-HT3A and 4, but not 2C receptors, were affected by cisplatin, and GE 100 and 500 mg/kg succeeded in downregulating the evoked upregulated gene of these receptors. Protein expression of 5-HT3A and 4 receptors were also reduced in the 100 mg/kg group. Furthermore, the injection of 5-HT3A, and 4 receptors antagonists (palonostron, 0.1 mg/kg, i.p.; piboserod, 1 mg/kg, i.p., respectively) in cisplatin treated rats prevented the decrease in food intake. Using high-performance liquid chromatography (HPLC) analysis, [6]-gingerol and [6]-shogaol were identified and quantified as the major components of GE, comprising 4.12% and 2.15% of the GE, respectively. Although [6]-gingerol or [6]-shogaol alone failed to alleviate the evoked anorexia, when treated together, the effect was significant on the cisplatin-induced decrease in food intake. These results show that GE can be considered a treatment option to alleviate cisplatin-induced anorexia.
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Affiliation(s)
- Hyeonah Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Keun-Tae Park
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Heejoon Jo
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Yuchan Shin
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Geehoon Chung
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Seong-Gyu Ko
- Korean Medicine-Based Drug Repositioning Cancer Research Center, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Young-Ho Jin
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Woojin Kim
- Department of Physiology, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
- Korean Medicine-Based Drug Repositioning Cancer Research Center, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
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Jin Y, Chen F, Zhao J, Jiang Y, Jin G, Zhang Z, Li Q. A randomized trial evaluating the association between related gene polymorphism and nausea and vomiting induced by cisplatin multi-day chemotherapy. BMC Med Genomics 2023; 16:276. [PMID: 37924126 PMCID: PMC10625179 DOI: 10.1186/s12920-023-01719-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 10/28/2023] [Indexed: 11/06/2023] Open
Abstract
PURPOSE We aim to investigate the correlation between gene polymorphisms and cisplatin chemotherapy-induced nausea and vomiting (CINV), which was prevented by olanzapine or aprepitant triple antiemetic regimen. METHODS Before chemotherapy, the blood samples of 89 malignant tumor patients who received multi-day chemotherapy with cisplatin were collected for sequencing and typing. As there were duplicate patients enrolled in different chemotherapy cycles, there were a total of 190 cases. The patients were divided into two groups randomly, who received the triple antiemetic regimen of olanzapine or aprepitant combined with 5-HT3RA and dexamethasone. The main evaluation indicators were the total protection (TP) rate in the acute phase (0-24 h), the delayed phase (25-120 h) and the overall phase (0-120 h). RESULTS Univariate analysis was performed on genetic loci that reached H-W balance with TP. In the olanzapine group, increased TP in the acute phase was associated with HTR3A rs1176719 non-GG (P < 0.05) genotype etc. Increased TP in the delayed phase was associated with HTR3A rs1176719 non-GG (P < 0.05) genotype etc. In the aprepitant group, increased TP in the acute phase was associated with the MTHFR rs1801131 TT (P < 0.05) genotype etc. Increased TP in the delayed phase was associated with HTR3A rs1062613 CC (P < 0.05) genetype ect. Multivariate Logistic regression analysis showed that HTR3B rs7943062GG (P < 0.05) genotype etc. were correlated with increased TP in the delayed phase. MTHFR rs1801131TT genotype was associated with increased TP in the acute phase (P < 0.05) and delayed phase (P < 0.05). CONCLUSION This study found that gene polymorphisms, including HTR3B (rs1062613, rs1176719, rs2276303), HTR3B (rs45460698, rs7943062), HTR3C (rs6766410), ERCC1 (rs3212986), ERCC4 (rs744154) and MTHFR(rs1801131), may be independent prognostic factors for CINV.
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Affiliation(s)
- Yilan Jin
- Department of Infectious diseases Department, Inner Mongolia People's Hospital, Hohhot, 010017, China
| | - Feng Chen
- Department of Medical Oncology, Ordos Central Hospital, 23th Yijinhuoluo Western Road, Ordos, 017000, China
| | - Juan Zhao
- Department of Medical Oncology, Ordos Central Hospital, 23th Yijinhuoluo Western Road, Ordos, 017000, China
| | - Ying Jiang
- Department of Medical Oncology, Ordos Central Hospital, 23th Yijinhuoluo Western Road, Ordos, 017000, China
| | - Gaowa Jin
- Department of Medical Oncology, Ordos Central Hospital, 23th Yijinhuoluo Western Road, Ordos, 017000, China
| | - Zewei Zhang
- Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Dongfeng East Road, Guangzhou, 510060, China.
| | - Quanfu Li
- Department of Medical Oncology, Ordos Central Hospital, 23th Yijinhuoluo Western Road, Ordos, 017000, China.
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Zhao J, Zhao F, Yuan J, Liu H, Wang Y. Gut microbiota metabolites, redox status, and the related regulatory effects of probiotics. Heliyon 2023; 9:e21431. [PMID: 38027795 PMCID: PMC10643359 DOI: 10.1016/j.heliyon.2023.e21431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 09/29/2023] [Accepted: 10/20/2023] [Indexed: 12/01/2023] Open
Abstract
Oxidative stress is a state of imbalance between oxidation and antioxidation. It is caused by excess levels of free radicals and leads to the damage of DNA, proteins, and lipids. The crucial role of gut microbiota in regulating oxidative stress has been widely demonstrated. Studies have suggested that the redox regulatory effects of gut microbiota are related to gut microbiota metabolites, including fatty acids, lipopolysaccharides, tryptophan metabolites, trimethylamine-N-oxide and polyphenolic metabolites. In recent years, the potential benefits of probiotics have been gaining increasing scientific interest owing to their ability to modulate gut microbiota and oxidative stress. In this review, we summarise the adverse health effects of oxidative stress and discuss the role of the gut microbiota and its metabolites in redox regulation. Based on the influence of gut microbiota metabolites, the roles of probiotics in preventing oxidative stress are highlighted.
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Affiliation(s)
| | | | - Junmeng Yuan
- College of Animal Science and Technology, Qingdao Agricultural University, 266109, Qingdao, China
| | - Huawei Liu
- College of Animal Science and Technology, Qingdao Agricultural University, 266109, Qingdao, China
| | - Yang Wang
- College of Animal Science and Technology, Qingdao Agricultural University, 266109, Qingdao, China
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Omote M, Wakimoto Y, Shibahara H. Possible Role of 5-Hydroxytryptamine (5-HT) Receptor on Human Sperm Motility Regulation. Cureus 2023; 15:e49530. [PMID: 38033435 PMCID: PMC10682562 DOI: 10.7759/cureus.49530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2023] [Indexed: 12/02/2023] Open
Abstract
The purpose of this study is to examine whether 5-hydroxytryptamine (5-HT, also known as serotonin) regulates human sperm motility, focusing on 5-HT receptors. Immunofluorescent staining revealed the existence of seven types of 5-HT receptors with a heterogeneous pattern of reactive sites. In detail, 5-HT1B, 5-HT6, and 5-HT7 were detected in the post-acrosomal and mid-piece regions. The 5-HT2A and 5-HT5A receptors were mainly localized in the equatorial segment. 5-HT3A and 5-HT4 receptors were present in the neck and post-acrosomal regions. When examining the effects of 5-HT receptor antagonists on sperm motility, only the 5-HT2A receptor antagonist significantly reduced sperm motility. This suggests that the 5-HT2A receptor may have a regulatory function in sperm motility. Eventually, progressive motility should be attenuated to penetrate the oocyte for fertilization. The current study indicated heterogenous expression patterns and plausible functions of 5-HT receptors in human sperm.
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Affiliation(s)
- Maya Omote
- Obstetrics and Gynecology, Hyogo Medical University School of Medicine, Nishinomiya, JPN
| | - Yu Wakimoto
- Obstetrics and Gynecology, Hyogo Medical University School of Medicine, Nishinomiya, JPN
| | - Hiroaki Shibahara
- Obstetrics and Gynecology, Hyogo Medical University School of Medicine, Nishinomiya, JPN
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Custodio RJP, Ortiz DM, Lee HJ, Sayson LV, Kim M, Lee YS, Kim KM, Cheong JH, Kim HJ. Serotonin 2C receptors are also important in head-twitch responses in male mice. Psychopharmacology (Berl) 2023:10.1007/s00213-023-06482-9. [PMID: 37882810 DOI: 10.1007/s00213-023-06482-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 10/05/2023] [Indexed: 10/27/2023]
Abstract
RATIONALE Serotonergic psychedelics exert their effects via their high affinity for serotonin (5-HT) receptors, particularly through activating 5-HT2A receptors (5-HT2AR), employing the frontal cortex-dependent head-twitch response (HTR). Although universally believed to be so, studies have not yet fully ascertained whether 5-HT2AR activation is the sole initiator of these psychedelic effects. This is because not all 5-HT2AR agonists exhibit similar pharmacologic properties. OBJECTIVE This study aims to identify and discriminate the roles of 5-HT2AR and 5-HT2CR in the HTR induced by Methallylescaline (MAL) and 4-Methyl-2,5,β-trimethoxyphenethylamine (BOD) in male mice. Also, an analysis of their potential neurotoxic properties was evaluated. METHODS Male mice treated with MAL and BOD were evaluated in different behavioral paradigms targeting HTR and neurotoxicity effects. Drug affinity, pharmacological blocking, and molecular analysis were also conducted to support the behavioral findings. The HTR induced by DOI has been extensively characterized in male mice, making it a good positive control for this study, specifically for comparing the pharmacological effects of our test compounds. RESULTS The activation of 5-HT2CR, alone or in concert with 5-HT2AR, produces a comparable degree of HTRs (at a dose of 1 mg·kg-1), with divergent 5-HT2CR- and 5-HT2AR-Gqα11-mediated signaling and enhanced neurotoxic properties (at a dose of 30 mg·kg-1) coupled with activated pro-inflammatory cytokines. These findings show these compounds' potential psychedelic and neurotoxic effects in male mice. CONCLUSION These findings showed that while 5-HT2AR is the main initiator of HTR, the 5-HT2CR also has a distinct property that renders it effective in inducing HTR in male mice.
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Affiliation(s)
- Raly James Perez Custodio
- Networking Group Aging, Department of Ergonomics, Leibniz Research Centre for Working Environment and Human Factors - IfADo, Ardeystrasse 67, Dortmund, 44139, Germany.
| | - Darlene Mae Ortiz
- Uimyung Research Institute for Neuroscience, Department of Pharmacy, Sahmyook University, 815 Hwarang-ro, Nowon-gu, Seoul, 01795, Republic of Korea
| | - Hyun Jun Lee
- Uimyung Research Institute for Neuroscience, Department of Pharmacy, Sahmyook University, 815 Hwarang-ro, Nowon-gu, Seoul, 01795, Republic of Korea
| | - Leandro Val Sayson
- Uimyung Research Institute for Neuroscience, Department of Pharmacy, Sahmyook University, 815 Hwarang-ro, Nowon-gu, Seoul, 01795, Republic of Korea
| | - Mikyung Kim
- Department of Chemistry & Life Science, Sahmyook University, 815 Hwarang-ro, Nowon-gu, Seoul, 01795, Republic of Korea
| | - Yong Sup Lee
- Medicinal Chemistry Laboratory, Department of Pharmacy & Department of Life and Nanopharmaceutical Sciences, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Seoul, 02447, Republic of Korea
| | - Kyeong-Man Kim
- Department of Pharmacology, College of Pharmacy, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Republic of Korea
| | - Jae Hoon Cheong
- Institute for New Drug Development, College of Pharmacy, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea.
| | - Hee Jin Kim
- Uimyung Research Institute for Neuroscience, Department of Pharmacy, Sahmyook University, 815 Hwarang-ro, Nowon-gu, Seoul, 01795, Republic of Korea.
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Sathe PK, Ramdasi GR, Giammatteo K, Beauzile H, Wang S, Zhang H, Kulkarni P, Booth RG, Ferris C. Effects of (-)-MBP, a novel 5-HT 2C agonist and 5-HT 2A/2B antagonist/inverse agonist on brain activity: A phMRI study on awake mice. Pharmacol Res Perspect 2023; 11:e01144. [PMID: 37837184 PMCID: PMC10576165 DOI: 10.1002/prp2.1144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/10/2023] [Accepted: 09/14/2023] [Indexed: 10/15/2023] Open
Abstract
A novel serotonin ligand (-)-MBP was developed for the treatment of schizophrenia that has 5-HT2A/2B antagonist activity together with 5-HT2C agonist activity. The multi-functional activity of this novel drug candidate was characterized using pharmacological magnetic resonance imaging. It was hypothesized (-)-MBP would affect activity in brain areas associated with sensory perception. Adult male mice were given one of three doses of (-)-MBP (3.0, 10, 18 mg/kg) or vehicle while fully awake during the MRI scanning session and imaged for 15 min post I.P. injection. BOLD functional imaging was used to follow changes in global brain activity. Data for each treatment were registered to a 3D MRI mouse brain atlas providing site-specific information on 132 different brain areas. There was a dose-dependent decrease in positive BOLD signal in numerous brain regions, especially thalamus, cerebrum, and limbic cortex. The 3.0 mg/kg dose had the greatest effect on positive BOLD while the 18 mg/kg dose was less effective. Conversely, the 18 mg/kg dose showed the greatest negative BOLD response while the 3.0 mg/kg showed the least. The prominent activation of the thalamus and cerebrum included the neural circuitry associated with Papez circuit of emotional experience. When compared to vehicle, the 3.0 mg dose affected all sensory modalities, for example, olfactory, somatosensory, motor, and auditory except for the visual cortex. These findings show that (-)-MBP, a ligand with both 5-HT2A/2B antagonist and 5-HT2C agonist activities, interacts with thalamocortical circuitry and impacts areas involved in sensory perception.
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Affiliation(s)
- Preeti K. Sathe
- Department Pharmaceutical SciencesNortheastern UniversityBostonMassachusettsUSA
| | - Gargi R. Ramdasi
- Department Pharmaceutical SciencesNortheastern UniversityBostonMassachusettsUSA
| | - Kaylie Giammatteo
- Department Pharmaceutical SciencesNortheastern UniversityBostonMassachusettsUSA
| | - Harvens Beauzile
- Department Pharmaceutical SciencesNortheastern UniversityBostonMassachusettsUSA
| | - Shuyue Wang
- Department Pharmaceutical SciencesNortheastern UniversityBostonMassachusettsUSA
| | - Heng Zhang
- Department Pharmaceutical SciencesNortheastern UniversityBostonMassachusettsUSA
| | - Praveen Kulkarni
- Center for Translational NeuroscienceNortheastern UniversityBostonMassachusettsUSA
| | - Raymond G. Booth
- Department Pharmaceutical SciencesNortheastern UniversityBostonMassachusettsUSA
| | - Craig F. Ferris
- Department Pharmaceutical SciencesNortheastern UniversityBostonMassachusettsUSA
- Center for Translational NeuroscienceNortheastern UniversityBostonMassachusettsUSA
- Department PsychologyNortheastern UniversityBostonMassachusettsUSA
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Ng AJ, Vincelette LK, Li J, Brady BH, Christianson JP. Serotonin modulates social responses to stressed conspecifics via insular 5-HT 2C receptors in rat. Neuropharmacology 2023; 236:109598. [PMID: 37230216 PMCID: PMC10330840 DOI: 10.1016/j.neuropharm.2023.109598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 05/04/2023] [Accepted: 05/14/2023] [Indexed: 05/27/2023]
Abstract
Behaviors associated with distress can affect the anxiety-like states in observers and this social transfer of affect shapes social interactions among stressed individuals. We hypothesized that social reactions to stressed individuals engage the serotonergic dorsal raphe nucleus (DRN) which promotes anxiety-like behavior via postsynaptic action of serotonin at serotonin 2C (5-HT2C) receptors in the forebrain. First, we inhibited the DRN by administering an agonist (8-OH-DPAT, 1 μg in 0.5 μL) for the inhibitory 5-HT1A autoreceptors which silences 5-HT neuronal activity. 8-OH-DPAT prevented the approach and avoidance, respectively, of stressed juvenile (PN30) or stressed adult (PN60) conspecifics in the social affective preference (SAP) test in rats. Similarly, systemic administration of a 5-HT2C receptor antagonist (SB242084, 1 mg/kg, i.p.) prevented approach and avoidance of stressed juvenile or adult conspecifics, respectively. Seeking a locus of 5-HT2C action, we considered the posterior insular cortex which is critical for social affective behaviors and rich with 5-HT2C receptors. SB242084 administered directly into the insular cortex (5 μM in 0.5 μL bilaterally) interfered with the typical approach and avoidance behaviors observed in the SAP test. Finally, using fluorescent in situ hybridization, we found that 5-HT2C receptor mRNA (htr2c) is primarily colocalized with mRNA associated with excitatory glutamatergic neurons (vglut1) in the posterior insula. Importantly, the results of these treatments were the same in male and female rats. These data suggest that interactions with stressed others require the serotonergic DRN and that serotonin modulates social affective decision-making via action at insular 5-HT2C receptors.
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Affiliation(s)
- Alexandra J Ng
- Department of Psychology & Neuroscience, Boston College, 140 Commonwealth Ave, Chestnut Hill, MA, 02467, USA.
| | - Lindsay K Vincelette
- Department of Psychology & Neuroscience, Boston College, 140 Commonwealth Ave, Chestnut Hill, MA, 02467, USA
| | - Jiayi Li
- Department of Psychology & Neuroscience, Boston College, 140 Commonwealth Ave, Chestnut Hill, MA, 02467, USA
| | - Bridget H Brady
- Department of Psychology & Neuroscience, Boston College, 140 Commonwealth Ave, Chestnut Hill, MA, 02467, USA
| | - John P Christianson
- Department of Psychology & Neuroscience, Boston College, 140 Commonwealth Ave, Chestnut Hill, MA, 02467, USA
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Kunioku Y, Kimura M, Ouchi T, Fukuda K, Shibukawa Y. Intracellular cAMP Signaling Pathway via G s Protein-Coupled Receptor Activation in Rat Primary Cultured Trigeminal Ganglion Cells. Biomedicines 2023; 11:2347. [PMID: 37760789 PMCID: PMC10525138 DOI: 10.3390/biomedicines11092347] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/13/2023] [Accepted: 08/17/2023] [Indexed: 09/29/2023] Open
Abstract
G protein-coupled receptors in trigeminal ganglion (TG) neurons are often associated with sensory mechanisms, including nociception. We have previously reported the expression of P2Y12 receptors, which are Gi protein-coupled receptors, in TG cells. Activating P2Y12 receptors decreased the intracellular free Ca2+ concentration ([Ca2+]i). This indicated that intracellular adenosine 3',5'-cyclic monophosphate (cAMP) levels can mediate Ca2+ signaling in TG cells. Here, we report more extensive-expression patterns of Gs protein-coupled receptors in primary cultured TG neurons isolated from 7-day-old newborn Wistar rats and further examine the roles of these receptors in cAMP signaling using the BacMam sensor in these neurons. To identify TG neurons, we also measured [Ca2+]i using fura-2 in TG cells and measured intracellular cAMP levels. TG neurons were positive for Gαs protein-coupled receptors, beta-2 adrenergic (β2), calcitonin gene-related peptide (CGRP), adenosine A2A (A2A), dopamine 1 (D1), prostaglandin I2 (IP), and 5-hydroxytriptamine 4 (5-HT4) receptor. Application of forskolin (FSK), an activator of adenylyl cyclase, transiently increased intracellular cAMP levels in TG neurons. The application of a phosphodiesterase inhibitor augmented the FSK-elicited intracellular cAMP level increase. These increases were significantly suppressed by the application of SQ22536, an adenylyl cyclase inhibitor, in TG neurons. Application of agonists for β2, CGRP, A2A, D1-like, IP, and 5-HT4 receptors increased intracellular cAMP levels. These increases were SQ22536-sensitive. These results suggested that TG neurons express β2, CGRP, A2A, D1, IP, and 5-HT4 receptors, and the activations of these Gαs protein-coupled receptors increase intracellular cAMP levels by activating adenylyl cyclase.
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Affiliation(s)
- Yuki Kunioku
- Department of Physiology, Tokyo Dental College, 2-9-18, Kanda-Misaki-cho, Chiyoda-ku, Tokyo 101-0061, Japan; (Y.K.); (T.O.); (Y.S.)
- Division of Special Needs Dentistry and Orofacial Pain, Department of Oral Health and Clinical Science, Tokyo Dental College, 2-9-18, Kanda-Misaki-cho, Chiyoda-ku, Tokyo 101-0061, Japan;
| | - Maki Kimura
- Department of Physiology, Tokyo Dental College, 2-9-18, Kanda-Misaki-cho, Chiyoda-ku, Tokyo 101-0061, Japan; (Y.K.); (T.O.); (Y.S.)
| | - Takehito Ouchi
- Department of Physiology, Tokyo Dental College, 2-9-18, Kanda-Misaki-cho, Chiyoda-ku, Tokyo 101-0061, Japan; (Y.K.); (T.O.); (Y.S.)
| | - Kenichi Fukuda
- Division of Special Needs Dentistry and Orofacial Pain, Department of Oral Health and Clinical Science, Tokyo Dental College, 2-9-18, Kanda-Misaki-cho, Chiyoda-ku, Tokyo 101-0061, Japan;
| | - Yoshiyuki Shibukawa
- Department of Physiology, Tokyo Dental College, 2-9-18, Kanda-Misaki-cho, Chiyoda-ku, Tokyo 101-0061, Japan; (Y.K.); (T.O.); (Y.S.)
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Conde K, Fang S, Xu Y. Unraveling the serotonin saga: from discovery to weight regulation and beyond - a comprehensive scientific review. Cell Biosci 2023; 13:143. [PMID: 37550777 PMCID: PMC10408233 DOI: 10.1186/s13578-023-01091-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 07/21/2023] [Indexed: 08/09/2023] Open
Abstract
The prevalence of obesity is rapidly increasing worldwide, while the development of effective obesity therapies lags behind. Although new therapeutic targets to alleviate obesity are identified every day, and drug efficacy is improving, adverse side effects and increased health risks remain serious issues facing the weight-loss industry. Serotonin, also known as 5-HT, has been extensively studied in relation to appetite reduction and weight loss. As a result, dozens of upstream and downstream neural targets of 5-HT have been identified, revealing a multitude of neural circuits involved in mediating the anorexigenic effect of 5-HT. Despite the rise and fall of several 5-HT therapeutics in recent decades, the future of 5-HT as a therapeutic target for weight-loss therapy looks promising. This review focuses on the history of serotonin, the state of current central serotonin research, previous serotonergic therapies, and the future of serotonin for treating individuals with obesity.
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Affiliation(s)
- Kristine Conde
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, USA.
| | - Shuzheng Fang
- College of Art and Sciences, Washington University in St. Louis, St. Louis, MO, USA
| | - Yong Xu
- USDA/ARS Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, USA.
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, USA.
- Section of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Houston, TX, 77030, USA.
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Wang H, Gu Y, Khalid R, Chen X, Han T. Herbal medicines for insomnia through regulating 5-hydroxytryptamine receptors: a systematic review. Chin J Nat Med 2023; 21:483-498. [PMID: 37517817 DOI: 10.1016/s1875-5364(23)60405-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Indexed: 08/01/2023]
Abstract
Insomnia is a common sleep disorder without effective therapy and can affect a person's life. The mechanism of the disease is not completely understood. Hence, there is a need to understand the targets related to insomnia, in order to develop innovative therapies and new compounds. Recently, increasing interest has been focused on complementary and alternative medicines for treating or preventing insomnia. Research into their molecular components has revealed that their sedative and sleep-promoting properties rely on the interactions with various neurotransmitter systems in the brain. In this review, the role of 5-hydroxytryptamine (5-HT) in insomnia development is summarized, while a systematic analysis of studies is conducted to assess the mechanisms of herbal medicines on different 5-HT receptors subtypes, in order to provide reference for subsequent research.
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Affiliation(s)
- Haoran Wang
- School of Pharmacy, Naval Medical University (Second Military Medical University), Shanghai 200433, China; School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Yanqiu Gu
- Department of Pharmacy, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai 201999, China
| | - Rahman Khalid
- Faculty of Science, School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool, England
| | - Xiaofei Chen
- School of Pharmacy, Naval Medical University (Second Military Medical University), Shanghai 200433, China.
| | - Ting Han
- School of Pharmacy, Naval Medical University (Second Military Medical University), Shanghai 200433, China.
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Zhou H, Wang K, Xu Z, Liu D, Wang Y, Guo M. Chronic unpredictable stress induces depression/anxiety-related behaviors and alterations of hippocampal monoamine receptor mRNA expression in female mice at different ages. Heliyon 2023; 9:e18369. [PMID: 37539192 PMCID: PMC10393760 DOI: 10.1016/j.heliyon.2023.e18369] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 07/11/2023] [Accepted: 07/14/2023] [Indexed: 08/05/2023] Open
Abstract
Depression and anxiety are the most common mental health disorders. Though they affect people at any age and occur more often in females, the pathophysiological changes under these conditions are less investigated. In the present study, we examined the effects of age and stress on depression- and anxiety-related behaviors in female mice. Saccharin preference and the open field test were carried out before and after chronic unpredictable stress in 4-, 14- and 25-month-old female mice. After behavioral tests, mRNA levels of monoamine receptors in the hippocampus were measured by real-time RT-PCR. Chronic unpredictable stress decreased saccharin preference in 4-, 14- and 25-month-old mice and the time spent in the center in the open field test in 25-month-old mice. For monoamine receptors, analysis of variance revealed significant effects of age on mRNA levels of Htr1a, Htr2a, Htr6, Adra1a, Adrb2, and Adrb3, significant effects of stress on mRNA levels of Htr4, Adra2c, Adrb1, and Adrb2, and interactions of age × stress on mRNA levels of Htr1a, Htr5b, Adra1d, Adra2a, Adra2c, and Adrb1. Chronic unpredictable stress decreased mRNA levels of Htr4, Htr5b, Adra2c, and Adrb1 in 4-month-old female mice. Correlations were observed between saccharin preference and mRNA levels of Htr4, Htr5b, Htr6, Adra1d, Adra2a, and Adra2c in 4-month-old mice and between the time spent in the center in the open field test and mRNA levels of Htr1b in 4-month-old mice, Htr3a, Htr7, and Adrb2 in 14-month-old mice, and Drd2 in 4- and 14-month-old mice. Our findings support that stress induces depression- and anxiety-related behaviors and the expression of hippocampal monoamine receptors in an age-dependent manner in female mice.
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Affiliation(s)
- Han Zhou
- Department of Psychology, Binzhou Medical University Hospital, The First School of Clinical Medicine of Binzhou Medical University, Binzhou, Shandong, 256603, China
- Medical Research Center, Binzhou Medical University Hospital, The First School of Clinical Medicine of Binzhou Medical University, Binzhou, Shandong, 256603, China
| | - Kaixin Wang
- Medical Research Center, Binzhou Medical University Hospital, The First School of Clinical Medicine of Binzhou Medical University, Binzhou, Shandong, 256603, China
| | - Zhicheng Xu
- Medical Research Center, Binzhou Medical University Hospital, The First School of Clinical Medicine of Binzhou Medical University, Binzhou, Shandong, 256603, China
| | - Dunjiang Liu
- Medical Research Center, Binzhou Medical University Hospital, The First School of Clinical Medicine of Binzhou Medical University, Binzhou, Shandong, 256603, China
| | - Yameng Wang
- Medical Research Center, Binzhou Medical University Hospital, The First School of Clinical Medicine of Binzhou Medical University, Binzhou, Shandong, 256603, China
| | - Ming Guo
- Department of Psychology, Binzhou Medical University Hospital, The First School of Clinical Medicine of Binzhou Medical University, Binzhou, Shandong, 256603, China
- Medical Research Center, Binzhou Medical University Hospital, The First School of Clinical Medicine of Binzhou Medical University, Binzhou, Shandong, 256603, China
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González-Hernández A, Marichal-Cancino BA, MaassenVanDenBrink A, Villalón CM. Serotonergic Modulation of Neurovascular Transmission: A Focus on Prejunctional 5-HT Receptors/Mechanisms. Biomedicines 2023; 11:1864. [PMID: 37509503 PMCID: PMC10377335 DOI: 10.3390/biomedicines11071864] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/17/2023] [Accepted: 06/23/2023] [Indexed: 07/30/2023] Open
Abstract
5-Hydroxytryptamine (5-HT), or serotonin, plays a crucial role as a neuromodulator and/or neurotransmitter of several nervous system functions. Its actions are complex, and depend on multiple factors, including the type of effector or receptor activated. Briefly, 5-HT can activate: (i) metabotropic (G-protein-coupled) receptors to promote inhibition (5-HT1, 5-HT5) or activation (5-HT4, 5-HT6, 5-HT7) of adenylate cyclase, as well as activation (5-HT2) of phospholipase C; and (ii) ionotropic receptor (5-HT3), a ligand-gated Na+/K+ channel. Regarding blood pressure regulation (and beyond the intricacy of central 5-HT effects), this monoamine also exerts direct postjunctional (on vascular smooth muscle and endothelium) or indirect prejunctional (on autonomic and sensory perivascular nerves) effects. At the prejunctional level, 5-HT can facilitate or preclude the release of autonomic (e.g., noradrenaline and acetylcholine) or sensory (e.g., calcitonin gene-related peptide) neurotransmitters facilitating hypertensive or hypotensive effects. Hence, we cannot formulate a specific impact of 5-HT on blood pressure level, since an increase or decrease in neurotransmitter release would be favoured, depending on the type of prejunctional receptor involved. This review summarizes and discusses the current knowledge on the prejunctional mechanisms involved in blood pressure regulation by 5-HT and its impact on some vascular-related diseases.
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Affiliation(s)
- Abimael González-Hernández
- Instituto de Neurobiología, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Queretaro 76230, Mexico
| | - Bruno A Marichal-Cancino
- Departamento de Fisiología y Farmacología, Universidad Autónoma de Aguascalientes, Mexico City 20100, Mexico
| | - Antoinette MaassenVanDenBrink
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, Erasmus MC University Medical Center, 3000 CA Rotterdam, The Netherlands
| | - Carlos M Villalón
- Departamento de Farmacobiología, Cinvestav-Coapa, Calzada de los Tenorios 235, Colonia Granjas-Coapa, Delegación Tlalpan, Mexico City 14330, Mexico
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Tylš F, Vejmola Č, Koudelka V, Piorecká V, Kadeřábek L, Bochin M, Novák T, Kuchař M, Bendová Z, Brunovský M, Horáček J, Pálení ček T. Underlying pharmacological mechanisms of psilocin-induced broadband desynchronization and disconnection of EEG in rats. Front Neurosci 2023; 17:1152578. [PMID: 37425017 PMCID: PMC10325866 DOI: 10.3389/fnins.2023.1152578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 05/30/2023] [Indexed: 07/11/2023] Open
Abstract
Introduction Psilocybin is one of the most extensively studied psychedelic drugs with a broad therapeutic potential. Despite the fact that its psychoactivity is mainly attributed to the agonism at 5-HT2A receptors, it has high binding affinity also to 5-HT2C and 5-HT1A receptors and indirectly modulates the dopaminergic system. Psilocybin and its active metabolite psilocin, as well as other serotonergic psychedelics, induce broadband desynchronization and disconnection in EEG in humans as well as in animals. The contribution of serotonergic and dopaminergic mechanisms underlying these changes is not clear. The present study thus aims to elucidate the pharmacological mechanisms underlying psilocin-induced broadband desynchronization and disconnection in an animal model. Methods Selective antagonists of serotonin receptors (5-HT1A WAY100635, 5-HT2A MDL100907, 5-HT2C SB242084) and antipsychotics haloperidol, a D2 antagonist, and clozapine, a mixed D2 and 5-HT receptor antagonist, were used in order to clarify the underlying pharmacology. Results Psilocin-induced broadband decrease in the mean absolute EEG power was normalized by all antagonists and antipsychotics used within the frequency range 1-25 Hz; however, decreases in 25-40 Hz were influenced only by clozapine. Psilocin-induced decrease in global functional connectivity and, specifically, fronto-temporal disconnection were reversed by the 5-HT2A antagonist while other drugs had no effect. Discussion These findings suggest the involvement of all three serotonergic receptors studied as well as the role of dopaminergic mechanisms in power spectra/current density with only the 5-HT2A receptor being effective in both studied metrics. This opens an important discussion on the role of other than 5-HT2A-dependent mechanisms underlying the neurobiology of psychedelics.
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Affiliation(s)
- Filip Tylš
- Psychedelic Research Centre, National Institute of Mental Health, Klecany, Czechia
- 3rd Faculty of Medicine, Charles University in Prague, Prague, Czechia
| | - Čestmír Vejmola
- Psychedelic Research Centre, National Institute of Mental Health, Klecany, Czechia
- 3rd Faculty of Medicine, Charles University in Prague, Prague, Czechia
| | - Vlastimil Koudelka
- Psychedelic Research Centre, National Institute of Mental Health, Klecany, Czechia
| | - Václava Piorecká
- Psychedelic Research Centre, National Institute of Mental Health, Klecany, Czechia
- Faculty of Biomedical Engineering, Czech Technical University in Prague, Kladno, Czechia
| | - Lukáš Kadeřábek
- Psychedelic Research Centre, National Institute of Mental Health, Klecany, Czechia
| | - Marcel Bochin
- Psychedelic Research Centre, National Institute of Mental Health, Klecany, Czechia
- 3rd Faculty of Medicine, Charles University in Prague, Prague, Czechia
| | - Tomáš Novák
- Psychedelic Research Centre, National Institute of Mental Health, Klecany, Czechia
- 3rd Faculty of Medicine, Charles University in Prague, Prague, Czechia
| | - Martin Kuchař
- Psychedelic Research Centre, National Institute of Mental Health, Klecany, Czechia
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, Prague, Czechia
| | - Zdeňka Bendová
- Psychedelic Research Centre, National Institute of Mental Health, Klecany, Czechia
| | - Martin Brunovský
- Psychedelic Research Centre, National Institute of Mental Health, Klecany, Czechia
- 3rd Faculty of Medicine, Charles University in Prague, Prague, Czechia
| | - Jiří Horáček
- Psychedelic Research Centre, National Institute of Mental Health, Klecany, Czechia
- 3rd Faculty of Medicine, Charles University in Prague, Prague, Czechia
| | - Tomáš Pálení ček
- Psychedelic Research Centre, National Institute of Mental Health, Klecany, Czechia
- 3rd Faculty of Medicine, Charles University in Prague, Prague, Czechia
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Bricker B, Voshavar C, Onyameh EK, Gonela UM, Lin X, Swanson TL, Kozell LB, Schmachtenberg JL, Bloom SH, Janowsky AJ, Ablordeppey SY. Enantiomeric Separation, Absolute Configuration by X-ray Crystallographic Analysis, and Functional Evaluation of Enantiomers of the Dual Ligand, SYA0340 at 5-HT 1A and 5-HT 7A Receptors. ACS OMEGA 2023; 8:21736-21744. [PMID: 37360419 PMCID: PMC10285950 DOI: 10.1021/acsomega.3c01283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 05/25/2023] [Indexed: 06/28/2023]
Abstract
We have previously identified 5-chloro-2-methyl-2-(3-(4-(pyridin-2-yl)piperazin-1-yl)propyl)-2,3-dihydro-1H-inden-1-one (SYA0340) as a dual 5-HT1A and 5-HT7 receptor ligand, and we posited such ligands might find utility in the treatment of various CNS related illnesses including cognitive and anxiolytic impairments. However, SYA0340 has a chiral center and its enantiomers may confound the readouts for their functional characteristics. Thus, in this study, we resynthesized SYA0340, separated the enantiomers, identified the absolute configurations, and evaluated their binding affinities and functional characteristics at both the 5-HT1A and 5-HT7A receptors. The results of this study show that the (+)-SYA0340-P1 [specific rotation [α] = +18.4 (deg.mL)/(g.dm)] has a binding affinity constant, Ki = 1.73 ± 0.55 nM at 5-HT1AR and Ki = 2.20 ± 0.33 nM at 5-HT7AR and (-)-SYA0340-P2 [specific rotation [α] = -18.2 (deg.mL)/(g.dm)] has Ki = 1.06 ± 0.32 nM (5-HT1AR) and 4.7 ± 1.1 nM (5-HT7AR). Using X-ray crystallographic techniques, the absolute configuration of the P2 isomer was identified as the S-enantiomer and, therefore, the P1 isomer as the R-enantiomer. Functionally, both SYA0340-P1 (EC50 = 1.12 ± 0.41 nM; Emax = 94.6 ± 3.1%) and SYA0340-P2 (EC50 = 2.21 ± 0.59 nM; Emax = 96.8 ± 5.1%) display similar agonist properties at the 5-HT1AR while both enantiomers display antagonist properties at the 5-HT7AR with P1 (IC50 = 32.1 ± 9.2 nM) displaying over 8 times greater potency as P2 (IC50 = 277 ± 46 nM). Thus, based on the functional evaluation results, SYA0340-P1 is considered as the eutomer of the pair of enantiomers of SYA0340. It is expected that these enantiomers will serve as new pharmacological probes for the 5-HT1A and 5-HT7A receptors.
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Affiliation(s)
- Barbara
A. Bricker
- Division
of Basic Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical
Sciences, Institute of Public Health, Florida
A&M University, Tallahassee, Florida 32307, United States
| | - Chandrashekhar Voshavar
- Division
of Basic Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical
Sciences, Institute of Public Health, Florida
A&M University, Tallahassee, Florida 32307, United States
| | - Edem K. Onyameh
- Division
of Basic Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical
Sciences, Institute of Public Health, Florida
A&M University, Tallahassee, Florida 32307, United States
| | - Uma M. Gonela
- Division
of Basic Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical
Sciences, Institute of Public Health, Florida
A&M University, Tallahassee, Florida 32307, United States
| | - Xinsong Lin
- Department
of Chemistry and Biochemistry, Florida State
University, 95 Chieftan Way Room 118 DLC, Tallahassee, Florida 32306-4390, United States
| | - Tracy L. Swanson
- Research
Service, VA Portland Health Care System, and Department of Psychiatry, Oregon Health and Science University, Portland Oregon 97239, United States
| | - Laura B. Kozell
- Research
Service, VA Portland Health Care System, and Department of Psychiatry, Oregon Health and Science University, Portland Oregon 97239, United States
| | - Jennifer L. Schmachtenberg
- Research
Service, VA Portland Health Care System, and Department of Psychiatry, Oregon Health and Science University, Portland Oregon 97239, United States
| | - Shelley H. Bloom
- Research
Service, VA Portland Health Care System, and Department of Psychiatry, Oregon Health and Science University, Portland Oregon 97239, United States
| | - Aaron J. Janowsky
- Research
Service, VA Portland Health Care System, and Department of Psychiatry, Oregon Health and Science University, Portland Oregon 97239, United States
| | - Seth Y. Ablordeppey
- Division
of Basic Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical
Sciences, Institute of Public Health, Florida
A&M University, Tallahassee, Florida 32307, United States
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42
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Merecz K, Hirsa M, Biniszewska O, Fichna J, Tarasiuk A. An overview of 5-HT 3 receptor antagonists as a treatment option for irritable bowel syndrome with diarrhea. Expert Opin Pharmacother 2023:1-10. [PMID: 37173833 DOI: 10.1080/14656566.2023.2214314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
INTRODUCTION Irritable bowel syndrome (IBS) is a functional gastrointestinal disorder characterized by abdominal pain, discomfort, and altered bowel habits, which affects the quality of life of approximately 10% of the worldwide population. IBS is classified into three types: IBS-D (diarrhea-predominant), IBS-C (constipation-predominant), and mixed or alternating IBS (IBS-M). Among potential interventions for IBS-D, the antagonism of the serotonin 5-HT3 receptor has recently emerged as an effective treatment option. Serotonin (5-HT) is a neurotransmitter and an immunoregulatory factor which plays a key role in physiological and pathological processes of the human body, having an impact on intestinal motility and gland secretion, which assist in maintaining intestinal homeostasis. AREAS COVERED In this paper, the concept of 5-HT3 antagonists in the treatment of individuals with IBS-D is discussed, with particular focus on mechanism of action and pre-clinical and clinical data. This study is based on pertinent papers that were retrieved by a selective search using relevant keywords in PubMed and ScienceDirect databases. EXPERT OPINION Recent clinical trial data has confirmed beyond doubt the value of 5-HT3 antagonists. As for future directions, weak partial 5-HT3 receptor agonism appears to be an appealing alternative to a silent antagonist for the treatment of IBS-D.
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Affiliation(s)
- Karolina Merecz
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka, Poland
| | - Mikołaj Hirsa
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka, Poland
| | - Olga Biniszewska
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka, Poland
| | - Jakub Fichna
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka, Poland
| | - Aleksandra Tarasiuk
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Mazowiecka, Poland
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Ambrogini P, Lattanzi D, Pagliarini M, Di Palma M, Sartini S, Cuppini R, Fuxe K, Borroto-Escuela DO. 5HT1AR-FGFR1 Heteroreceptor Complexes Differently Modulate GIRK Currents in the Dorsal Hippocampus and the Dorsal Raphe Serotonin Nucleus of Control Rats and of a Genetic Rat Model of Depression. Int J Mol Sci 2023; 24:ijms24087467. [PMID: 37108630 PMCID: PMC10144171 DOI: 10.3390/ijms24087467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/14/2023] [Accepted: 04/15/2023] [Indexed: 04/29/2023] Open
Abstract
The midbrain raphe serotonin (5HT) neurons provide the main ascending serotonergic projection to the forebrain, including hippocampus, which has a role in the pathophysiology of depressive disorder. Serotonin 5HT1A receptor (R) activation at the soma-dendritic level of serotonergic raphe neurons and glutamatergic hippocampal pyramidal neurons leads to a decrease in neuronal firing by activation of G protein-coupled inwardly-rectifying potassium (GIRK) channels. In this raphe-hippocampal serotonin neuron system, the existence of 5HT1AR-FGFR1 heteroreceptor complexes has been proven, but the functional receptor-receptor interactions in the heterocomplexes have only been investigated in CA1 pyramidal neurons of control Sprague Dawley (SD) rats. In the current study, considering the impact of the receptor interplay in developing new antidepressant drugs, the effects of 5HT1AR-FGFR1 complex activation were investigated in hippocampal pyramidal neurons and in midbrain dorsal raphe serotonergic neurons of SD rats and of a genetic rat model of depression (the Flinders Sensitive Line (FSL) rats of SD origin) using an electrophysiological approach. The results showed that in the raphe-hippocampal 5HT system of SD rats, 5HT1AR-FGFR1 heteroreceptor activation by specific agonists reduced the ability of the 5HT1AR protomer to open the GIRK channels through the allosteric inhibitory interplay produced by the activation of the FGFR1 protomer, leading to increased neuronal firing. On the contrary, in FSL rats, FGFR1 agonist-induced inhibitory allosteric action at the 5HT1AR protomer was not able to induce this effect on GIRK channels, except in CA2 neurons where we demonstrated that the functional receptor-receptor interaction is needed for producing the effect on GIRK. In keeping with this evidence, hippocampal plasticity, evaluated as long-term potentiation induction ability in the CA1 field, was impaired by 5HT1AR activation both in SD and in FSL rats, which did not develop after combined 5HT1AR-FGFR1 heterocomplex activation in SD rats. It is therefore proposed that in the genetic FSL model of depression, there is a significant reduction in the allosteric inhibition exerted by the FGFR1 protomer on the 5HT1A protomer-mediated opening of the GIRK channels in the 5HT1AR-FGFR1 heterocomplex located in the raphe-hippocampal serotonin system. This may result in an enhanced inhibition of the dorsal raphe 5HT nerve cell and glutamatergic hippocampal CA1 pyramidal nerve cell firing, which we propose may have a role in depression.
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Affiliation(s)
- Patrizia Ambrogini
- Department of Biomolecular Sciences, Università di Urbino Carlo Bo, I-61029 Urbino, Italy
| | - Davide Lattanzi
- Department of Biomolecular Sciences, Università di Urbino Carlo Bo, I-61029 Urbino, Italy
| | - Marica Pagliarini
- Department of Biomolecular Sciences, Università di Urbino Carlo Bo, I-61029 Urbino, Italy
| | - Michael Di Palma
- Department of Experimental and Clinical Medicine, Faculty of Medicine and Surgery, Università Politecnica delle Marche, I-60121 Ancona, Italy
| | - Stefano Sartini
- Department of Biomolecular Sciences, Università di Urbino Carlo Bo, I-61029 Urbino, Italy
| | - Riccardo Cuppini
- Department of Biomolecular Sciences, Università di Urbino Carlo Bo, I-61029 Urbino, Italy
| | - Kjell Fuxe
- Department of Neuroscience, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Dasiel Oscar Borroto-Escuela
- Department of Neuroscience, Karolinska Institutet, 171 77 Stockholm, Sweden
- Department of Human Physiology, Physical Education and Sport, Faculty of Medicine, University of Malaga, 29017 Malaga, Spain
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Aguiar DD, da Costa Oliveira C, Fonseca FCS, de Almeida DL, Campos Pereira WV, Guimarães FS, Perez AC, Duarte IDG, Romero TRL. Peripherally injected canabidiol reduces neuropathic pain in mice: Role of the 5-HT 1A and TRPV1 receptors. Biochem Biophys Res Commun 2023; 660:58-64. [PMID: 37068389 DOI: 10.1016/j.bbrc.2023.04.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 04/10/2023] [Indexed: 04/19/2023]
Abstract
Cannabidiol (CBD) is the most abundant non-psychoactive component found in plants of the genus Cannabis. Its analgesic effect for the treatment of neuropathy has been widely studied. However, little is known about its effects in the acute treatment when Cannabidiol is administered peripherally. Because of that, this research was aimed to evaluate the antinociceptive effects of the CBD when administered peripherally for the treatment of acute neuropathic pain and check the involvement of the 5-HT1A and the TRPV1 receptors in this event. Neuropathic pain was induced with the constriction of the sciatic nerve while the nociceptive threshold was measured using the pressure test of the mouse paw. The technique used proved to be efficient to induce neuropathy, and the CBD (5, 10 and 30 μg/paw) induced the antinociception in a dosage-dependent manner. The dosage used that induced a more potent effect (30 μg/paw), did not induce a systemic response, as demonstrated by both the motor coordination assessment test (RotaRod) and the antinociceptive effect restricted to the paw treated with CBD. The administration of NAN-190 (10 μg/paw), a selective 5-HT1A receptor antagonist, and SB-366791 (16 μg/paw), a selective TRPV1 antagonist, partially reversed the CBD-induced antinociception. The results of the research suggest that the CBD produces the peripheral antinociception during the acute treatment of the neuropathic pain and it partially involved the participation of the 5-HT1A and TRPV1 receptors.
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Affiliation(s)
- Danielle Diniz Aguiar
- Department of Pharmacology, Institute of Biological Sciences, UFMG, Belo Horizonte, MG, Brazil
| | | | | | | | | | | | - Andrea Castro Perez
- Department of Pharmacology, Institute of Biological Sciences, UFMG, Belo Horizonte, MG, Brazil
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Castillo-Arellano J, Canseco-Alba A, Cutler SJ, León F. The Polypharmacological Effects of Cannabidiol. Molecules 2023; 28:3271. [PMID: 37050032 PMCID: PMC10096752 DOI: 10.3390/molecules28073271] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/23/2023] [Accepted: 03/30/2023] [Indexed: 04/09/2023] Open
Abstract
Cannabidiol (CBD) is a major phytocannabinoid present in Cannabis sativa (Linneo, 1753). This naturally occurring secondary metabolite does not induce intoxication or exhibit the characteristic profile of drugs of abuse from cannabis like Δ9-tetrahydrocannabinol (∆9-THC) does. In contrast to ∆9-THC, our knowledge of the neuro-molecular mechanisms of CBD is limited, and its pharmacology, which appears to be complex, has not yet been fully elucidated. The study of the pharmacological effects of CBD has grown exponentially in recent years, making it necessary to generate frequently updated reports on this important metabolite. In this article, a rationalized integration of the mechanisms of action of CBD on molecular targets and pharmacological implications in animal models and human diseases, such as epilepsy, pain, neuropsychiatric disorders, Alzheimer's disease, and inflammatory diseases, are presented. We identify around 56 different molecular targets for CBD, including enzymes and ion channels/metabotropic receptors involved in neurologic conditions. Herein, we compiled the knowledge found in the scientific literature on the multiple mechanisms of actions of CBD. The in vitro and in vivo findings are essential for fully understanding the polypharmacological nature of this natural product.
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Affiliation(s)
- Jorge Castillo-Arellano
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29208, USA
| | - Ana Canseco-Alba
- Laboratory of Reticular Formation Physiology, National Institute of Neurology and Neurosurgery of Mexico (INNN), Mexico City 14269, Mexico
| | - Stephen J. Cutler
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29208, USA
| | - Francisco León
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29208, USA
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He L, Zhao Q, Qi J, Wang Y, Han W, Chen Z, Cong Y, Wang S. Structural insights into constitutive activity of 5-HT 6 receptor. Proc Natl Acad Sci U S A 2023; 120:e2209917120. [PMID: 36989299 PMCID: PMC10083584 DOI: 10.1073/pnas.2209917120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 02/16/2023] [Indexed: 03/30/2023] Open
Abstract
While most therapeutic research on G-protein-coupled receptors (GPCRs) focuses on receptor activation by (endogenous) agonists, significant therapeutic potential exists through agonist-independent intrinsic constitutive activity that can occur in various physiological and pathophysiological settings. For example, inhibiting the constitutive activity of 5-HT6R-a receptor that is found almost exclusively in the brain and mediates excitatory neurotransmission-has demonstrated a therapeutic effect on cognitive/memory impairment associated with several neuropsychiatric disorders. However, the structural basis of such constitutive activity remains unclear. Here, we present a cryo-EM structure of serotonin-bound human 5-HT6R-Gs heterotrimer at 3.0-Å resolution. Detailed analyses of the structure complemented by comprehensive interrogation of signaling illuminate key structural determinants essential for constitutive 5-HT6R activity. Additional structure-guided mutagenesis leads to a nanobody mimic Gαs for 5-HT6R that can reduce its constitutive activity. Given the importance of 5-HT6R for a large number of neuropsychiatric disorders, insights derived from these studies will accelerate the design of more effective medications, and shed light on the molecular basis of constitutive activity.
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Affiliation(s)
- Licong He
- 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, Shanghai200031, China
| | - Qiaoyu Zhao
- 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, Shanghai200031, China
| | - Jianzhong Qi
- 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, Shanghai200031, China
| | - Yifan 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, Shanghai200031, China
| | - Wenyu Han
- 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, Shanghai200031, China
| | - Zhangcheng Chen
- 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, Shanghai200031, China
| | - Yao Cong
- 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, Shanghai200031, 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, Shanghai200031, China
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Karimi M, Mardanshahi A, Irannejad H, Mohammad Abedi S, Molavipordanjani S. Synthesis and evaluation of 99mTc-labeled 1-(2-Pyridyl)piperazine derivatives as radioligands for 5HT 7 receptors. Bioorg Chem 2023; 135:106486. [PMID: 36965286 DOI: 10.1016/j.bioorg.2023.106486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/07/2023] [Accepted: 03/17/2023] [Indexed: 03/27/2023]
Abstract
Glioblastoma multiform (GBM) is one of the most aggressive tumors of the central nervous system in humans. GBM overexpresses serotonin-7 receptors (5-HT7Rs); hence, this study aims to develop 5-HT7R targeted radiotracers. Aryl piperazine derivatives can act as ligands for 5-HT7R. Therefore, compounds 6 and 7 as 1-(3-nitropyridin-2-yl)piperazine derivatives were synthesized and radiolabeled with 99mTcN2+ core. Radiolabeled 6 and 7 (99mTcN-[6] and 99mTcN-[7]) were prepared with high radiochemical purity (RCP > 96%). They displayed high affinity toward U-87 MG cell line 5-HT7R. The calculated Ki for 99mTcN-[7] was lower than that of 99mTcN-[6] (14.85 ± 0.32 vs 22.57 ± 0.73 nM) which indicates the higher affinity of 99mTcN-[7] toward 5-HT7R. A molecular docking study also confirmed the binding of these radiotracers to 5-HT7R. The biodistribution study in normal mice revealed that 99mTcN-[7] has the highest brain accumulation at 30 min post-injection (0.54 ± 0.12 %ID/g) while the uptake of 99mTcN-[6] is much lower (0.14 ± 0.02 %ID/g). The biodistribution study in the xenograft model confirms that the radiotracers recognize the tumor site. 99mTcN-[6], and 99mTcN-[7] showed the highest tumor uptake at 1-hour post-injection (5.44 ± 0.58 vs 4.94 ± 1.65 %ID/g) and tumor-to-muscle ratios were (4.61 vs. 5.61). The injection of pimozide blocks the receptors and significantly reduces the tumor-to-muscle ratios at 1-hour post-injection to 0.81 and 0.31, respectively. In correlation with in vitro study, 99mTcN-[6] and 99mTcN-[7] visualize the tumor site in U-87 MG glioma xenografted nude mice and display the tumor-to-muscle ratios of 7.05 and 6.03.
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Affiliation(s)
- Maryam Karimi
- Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Alireza Mardanshahi
- Department of Radiology and Nuclear Medicine, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Hamid Irannejad
- Department of Medicinal Chemistry and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Seyed Mohammad Abedi
- Department of Radiology and Nuclear Medicine, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Sajjad Molavipordanjani
- Pharmaceutical Sciences Research Center, Hemoglobinopathy Institute, Mazandaran University of Medical Sciences, Sari, Iran.
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48
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Neumann J, Hofmann B, Dhein S, Gergs U. Cardiac Roles of Serotonin (5-HT) and 5-HT-Receptors in Health and Disease. Int J Mol Sci 2023; 24:ijms24054765. [PMID: 36902195 PMCID: PMC10003731 DOI: 10.3390/ijms24054765] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 02/20/2023] [Accepted: 02/22/2023] [Indexed: 03/06/2023] Open
Abstract
Serotonin acts solely via 5-HT4-receptors to control human cardiac contractile function. The effects of serotonin via 5-HT4-receptors lead to positive inotropic and chronotropic effects, as well as arrhythmias, in the human heart. In addition, 5-HT4-receptors may play a role in sepsis, ischaemia, and reperfusion. These presumptive effects of 5-HT4-receptors are the focus of the present review. We also discuss the formation and inactivation of serotonin in the body, namely, in the heart. We identify cardiovascular diseases where serotonin might play a causative or additional role. We address the mechanisms which 5-HT4-receptors can use for cardiac signal transduction and their possible roles in cardiac diseases. We define areas where further research in this regard should be directed in the future, and identify animal models that might be generated to this end. Finally, we discuss in what regard 5-HT4-receptor agonists or antagonists might be useful drugs that could enter clinical practice. Serotonin has been the target of many studies for decades; thus, we found it timely to summarise our current knowledge here.
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Affiliation(s)
- Joachim Neumann
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, D-06097 Halle, Germany
- Correspondence:
| | - Britt Hofmann
- Cardiac Surgery, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, D-06097 Halle, Germany
| | - Stefan Dhein
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Universität Leipzig, D-04109 Leipzig, Germany
| | - Ulrich Gergs
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, D-06097 Halle, Germany
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Phylogenetic analyses of 5-hydroxytryptamine 3 (5-HT3) receptors in Metazoa. PLoS One 2023; 18:e0281507. [PMID: 36857360 PMCID: PMC9977066 DOI: 10.1371/journal.pone.0281507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 01/24/2023] [Indexed: 03/02/2023] Open
Abstract
The 5-hydroxytrptamine 3 (5-HT3) receptor is a member of the 'Cys-loop' family and the only pentameric ligand gated ion channel among the serotonin receptors. 5-HT3 receptors play an important role in controlling growth, development, and behaviour in animals. Several 5-HT3 receptor antagonists are used to treat diseases (e.g., irritable bowel syndrome, nausea and emesis). Humans express five different subunits (A-E) enabling a variety of heteromeric receptors to form but all contain 5HT3A subunits. However, the information available about the 5-HT3 receptor subunit occurrence among the metazoan lineages is minimal. In the present article we searched for 5-HT3 receptor subunit homologs from different phyla in Metazoa. We identified more than 1000 5-HT3 receptor subunits in Metazoa in different phyla and undertook simultaneous phylogenetic analysis of 526 5HT3A, 358 5HT3B, 239 5HT3C, 70 5HT3D, and 173 5HT3E sequences. 5-HT3 receptor subunits were present in species belonging to 11 phyla: Annelida, Arthropoda, Chordata, Cnidaria, Echinodermata, Mollusca, Nematoda, Orthonectida, Platyhelminthes, Rotifera and Tardigrada. All subunits were most often identified in Chordata phylum which was strongly represented in searches. Using multiple sequence alignment, we investigated variations in the ligand binding region of the 5HT3A subunit protein sequences in the metazoan lineage. Several critical amino acid residues important for ligand binding (common structural features) are commonly present in species from Nematoda and Platyhelminth gut parasites through to Chordata. Collectively, this better understanding of the 5-HT3 receptor evolutionary patterns raises possibilities of future pharmacological challenges facing Metazoa including effects on parasitic and other species in ecosystems that contain 5-HT3 receptor ligands.
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Ng AJ, Vincelette LK, Li J, Brady BH, Christianson JP. Serotonin modulates social responses to stressed conspecifics via insular 5-HT 2C receptors in rat. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.18.529065. [PMID: 36824837 PMCID: PMC9949146 DOI: 10.1101/2023.02.18.529065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Social interaction allows for the transfer of affective states among individuals, and the behaviors and expressions associated with pain and fear can evoke anxiety-like states in observers which shape subsequent social interactions. We hypothesized that social reactions to stressed individuals engage the serotonergic dorsal raphe nucleus (DRN) which promotes anxiety-like behavior via postsynaptic action of serotonin at serotonin 2C (5-HT 2C ) receptors in the forebrain. First, we inhibited the DRN by administering an agonist (8-OH-DPAT, 1µg in 0.5µL) for the inhibitory 5-HT 1A autoreceptors which silences 5-HT neuronal activity via G-protein coupled inward rectifying potassium channels. 8-OH-DPAT prevented the approach and avoidance, respectively, of stressed juvenile (PN30) or stressed adult (PN50) conspecifics in the social affective preference (SAP) test in rats. Similarly, systemic administration of a 5-HT 2C receptor antagonist (SB242084, 1mg/kg, i.p.) prevented approach and avoidance of stressed juvenile or adult conspecifics, respectively. Seeking a locus of 5-HT 2C action, we considered the posterior insular cortex which is critical for social affective behaviors and rich with 5-HT 2C receptors. SB242084 administered directly into the insular cortex (5µM bilaterally in 0.5µL ) interfered with the typical approach and avoidance behaviors observed in the SAP test. Finally, using fluorescent in situ hybridization, we found that 5-HT 2C receptor mRNA ( htr2c) is primarily colocalized with mRNA associated with excitatory glutamatergic neurons ( vglut1 ) in the posterior insula. Importantly, the results of these treatments were the same in male and female rats. These data suggest that interactions with stressed others require the serotonergic DRN and that serotonin modulates social affective decision-making via action at insular 5-HT 2C receptors.
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