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Liu H, Qu N, Gonzalez NV, Palma MA, Chen H, Xiong J, Choubey A, Li Y, Li X, Yu M, Liu H, Tu L, Zhang N, Yin N, Conde KM, Wang M, Bean JC, Han J, Scarcelli NA, Yang Y, Saito K, Cui H, Tong Q, Sun Z, Wang C, Cai X, Lu L, He Y, Xu Y. A Light-Responsive Neural Circuit Suppresses Feeding. J Neurosci 2024; 44:e2192232024. [PMID: 38897723 PMCID: PMC11270527 DOI: 10.1523/jneurosci.2192-23.2024] [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: 11/23/2023] [Revised: 05/22/2024] [Accepted: 05/24/2024] [Indexed: 06/21/2024] Open
Abstract
Light plays an essential role in a variety of physiological processes, including vision, mood, and glucose homeostasis. However, the intricate relationship between light and an animal's feeding behavior has remained elusive. Here, we found that light exposure suppresses food intake, whereas darkness amplifies it in male mice. Interestingly, this phenomenon extends its reach to diurnal male Nile grass rats and healthy humans. We further show that lateral habenula (LHb) neurons in mice respond to light exposure, which in turn activates 5-HT neurons in the dorsal Raphe nucleus (DRN). Activation of the LHb→5-HTDRN circuit in mice blunts darkness-induced hyperphagia, while inhibition of the circuit prevents light-induced anorexia. Together, we discovered a light-responsive neural circuit that relays the environmental light signals to regulate feeding behavior in mice.
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Affiliation(s)
- Hailan Liu
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030 .
| | - Na Qu
- Research Center for Mental Health and Neuroscience, Wuhan Mental Health Center, Wuhan 430012, China .
- Wuhan Hospital for Psychotherapy, Wuhan 430012, China
- Affiliated Wuhan Mental Health Center, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430012, China
- Research Center for Psychological and Health Sciences, China University of Geosciences, Wuhan 430012, China
- Affiliated Wuhan Mental Health Center, Jianghan University, Wuhan 430012, China
| | | | - Marco A Palma
- Human Behavior Laboratory, Texas A&M University, College Station, Texas 77843
| | - Huamin Chen
- Research Center for Mental Health and Neuroscience, Wuhan Mental Health Center, Wuhan 430012, China
- Wuhan Hospital for Psychotherapy, Wuhan 430012, China
- Affiliated Wuhan Mental Health Center, Jianghan University, Wuhan 430012, China
| | - Jiani Xiong
- Research Center for Mental Health and Neuroscience, Wuhan Mental Health Center, Wuhan 430012, China
- Wuhan Hospital for Psychotherapy, Wuhan 430012, China
- Research Center for Psychological and Health Sciences, China University of Geosciences, Wuhan 430012, China
| | - Abhinav Choubey
- Department of Medicine-Endocrinology, Baylor College of Medicine, Houston, Texas 77030
| | - Yongxiang Li
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Xin Li
- Department of Medicine-Endocrinology, Baylor College of Medicine, Houston, Texas 77030
| | - Meng Yu
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Hesong Liu
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Longlong Tu
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Nan Zhang
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Na Yin
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Kristine Marie Conde
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Mengjie Wang
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Jonathan Carter Bean
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Junying Han
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Nikolas Anthony Scarcelli
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Yongjie Yang
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Kenji Saito
- Department of Pharmacology and Neuroscience, University of Iowa Carver College of Medicine, Iowa City, Iowa 52242
| | - Huxing Cui
- Department of Pharmacology and Neuroscience, University of Iowa Carver College of Medicine, Iowa City, Iowa 52242
- Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, Iowa City, Iowa 52242
- F.O.E. Diabetes Research Center, University of Iowa Carver College of Medicine, Iowa City, Iowa 52242
| | - Qingchun Tong
- Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas 77030
| | - Zheng Sun
- Department of Medicine-Endocrinology, Baylor College of Medicine, Houston, Texas 77030
| | - Chunmei Wang
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Xing Cai
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650201, China
| | - Li Lu
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650201, China
| | - Yang He
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030
| | - Yong Xu
- Department of Pediatrics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas 77030 .
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas 77030
- Section of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Baylor College of Medicine, Houston, Texas 77030
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2
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Sancho-Alonso M, Sarriés-Serrano U, Miquel-Rio L, Yanes Castilla C, Paz V, Meana JJ, Perello M, Bortolozzi A. New insights into the effects of serotonin on Parkinson's disease and depression through its role in the gastrointestinal tract. SPANISH JOURNAL OF PSYCHIATRY AND MENTAL HEALTH 2024:S2950-2853(24)00039-5. [PMID: 38992345 DOI: 10.1016/j.sjpmh.2024.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 06/12/2024] [Accepted: 07/02/2024] [Indexed: 07/13/2024]
Abstract
Neuropsychiatric and neurodegenerative disorders are frequently associated with gastrointestinal (GI) co-pathologies. Although the central and enteric nervous systems (CNS and ENS, respectively) have been studied separately, there is increasing interest in factors that may contribute to conditions affecting both systems. There is compelling evidence that serotonin (5-HT) may play an important role in several gut-brain disorders. It is well known that 5-HT is essential for the development and functioning of the CNS. However, most of the body's 5-HT is produced in the GI tract. A deeper understanding of the specific effects of enteric 5-HT on gut-brain disorders may provide the basis for the development of new therapeutic targets. This review summarizes current data focusing on the important role of 5-HT in ENS development and motility, with particular emphasis on novel aspects of 5-HT signaling in conditions where CNS and ENS comorbidities are common, such as Parkinson's disease and depressive disorders.
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Affiliation(s)
- María Sancho-Alonso
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain; Systems Neuropharmacology Research Group, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain; Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain; Anatomy and Human Embryology Department, Faculty of Medicine, University of Valencia, 46010 Valencia, Spain
| | - Unai Sarriés-Serrano
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain; Systems Neuropharmacology Research Group, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain; Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain; University of the Basque Country UPV/EHU, E-48940 Leioa, Bizkaia, Spain
| | - Lluis Miquel-Rio
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain; Systems Neuropharmacology Research Group, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain; Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain
| | - Claudia Yanes Castilla
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain
| | - Verónica Paz
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain; Systems Neuropharmacology Research Group, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain; Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain
| | - José Javier Meana
- Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain; University of the Basque Country UPV/EHU, E-48940 Leioa, Bizkaia, Spain; Biobizkaia Health Research Institute, 48903 Barakaldo, Spain
| | - Mario Perello
- Grupo de Neurofisiología, Instituto Multidisciplinario de Biología Celular (IMBICE), Universidad Nacional La Plata (UNLP), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) y Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC-PBA), La Plata, Argentina
| | - Analia Bortolozzi
- Institute of Biomedical Research of Barcelona (IIBB), Spanish National Research Council (CSIC), 08036 Barcelona, Spain; Systems Neuropharmacology Research Group, August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain; Biomedical Research Networking Center for Mental Health (CIBERSAM), Institute of Health Carlos III (ISCIII), 28029 Madrid, Spain.
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Cheng J, Chen L, Zheng YN, Liu J, Zhang L, Zhang XM, Huang L, Yuan QL. Disfunction of dorsal raphe nucleus-hippocampus serotonergic-HTR3 transmission results in anxiety phenotype of Neuroplastin 65-deficient mice. Acta Pharmacol Sin 2024; 45:1393-1405. [PMID: 38528118 PMCID: PMC11192762 DOI: 10.1038/s41401-024-01252-5] [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: 11/10/2023] [Accepted: 02/26/2024] [Indexed: 03/27/2024] Open
Abstract
Anxiety disorders are the most common psychiatric condition, but the etiology of anxiety disorders remains largely unclear. Our previous studies have shown that neuroplastin 65 deficiency (NP65-/-) mice exhibit abnormal social and mental behaviors and decreased expression of tryptophan hydroxylase 2 (TPH2) protein. However, whether a causal relationship between TPH2 reduction and anxiety disorders exists needs to be determined. In present study, we found that replenishment of TPH2 in dorsal raphe nucleus (DRN) enhanced 5-HT level in the hippocampus and alleviated anxiety-like behaviors. In addition, injection of AAV-NP65 in DRN significantly increased TPH2 expression in DRN and hippocampus, and reduced anxiety-like behaviors. Acute administration of exogenous 5-HT or HTR3 agonist SR57227A in hippocampus mitigated anxiety-like behaviors in NP65-/- mice. Moreover, replenishment of TPH2 in DRN partly repaired the impairment of long-term potentiation (LTP) maintenance in hippocampus of NP65-/- mice. Finally, we found that loss of NP65 lowered transcription factors Lmx1b expression in postnatal stage and replenishment of NP65 in DRN reversed the decrease in Lmx1b expression of NP65-/- mice. Together, our findings reveal that NP65 deficiency induces anxiety phenotype by downregulating DRN-hippocampus serotonergic-HTR3 transmission. These studies provide a novel and insightful view about NP65 function, suggesting an attractive potential target for treatment of anxiety disorders.
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Affiliation(s)
- Jie Cheng
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China
- Department of Human Anatomy, Histology and Embryology, Tongji University School of Medicine, Shanghai, 200092, China
| | - Ling Chen
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China
- Department of Human Anatomy, Histology and Embryology, Tongji University School of Medicine, Shanghai, 200092, China
| | - Ya-Ni Zheng
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China
- Department of Human Anatomy, Histology and Embryology, Tongji University School of Medicine, Shanghai, 200092, China
| | - Juan Liu
- Chinese Institute for Brain Research, Beijing, 102206, China
| | - Lei Zhang
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China
- Department of Human Anatomy, Histology and Embryology, Tongji University School of Medicine, Shanghai, 200092, China
| | - Xiao-Ming Zhang
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China
- Department of Human Anatomy, Histology and Embryology, Tongji University School of Medicine, Shanghai, 200092, China
| | - Liang Huang
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China
- Department of Human Anatomy, Histology and Embryology, Tongji University School of Medicine, Shanghai, 200092, China
| | - Qiong-Lan Yuan
- Department of Neurology, Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China.
- Department of Human Anatomy, Histology and Embryology, Tongji University School of Medicine, Shanghai, 200092, China.
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4
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Gonzalez-Ramos A, Puigsasllosas-Pastor C, Arcas-Marquez A, Tornero D. Updated Toolbox for Assessing Neuronal Network Reconstruction after Cell Therapy. Bioengineering (Basel) 2024; 11:487. [PMID: 38790353 PMCID: PMC11118929 DOI: 10.3390/bioengineering11050487] [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: 03/30/2024] [Revised: 05/02/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
Cell therapy has proven to be a promising treatment for a range of neurological disorders, including Parkinson Disease, drug-resistant epilepsy, and stroke, by restoring function after brain damage. Nevertheless, evaluating the true effectiveness of these therapeutic interventions requires a deep understanding of the functional integration of grafted cells into existing neural networks. This review explores a powerful arsenal of molecular techniques revolutionizing our ability to unveil functional integration of grafted cells within the host brain. From precise manipulation of neuronal activity to pinpoint the functional contribution of transplanted cells by using opto- and chemo-genetics, to real-time monitoring of neuronal dynamics shedding light on functional connectivity within the reconstructed circuits by using genetically encoded (calcium) indicators in vivo. Finally, structural reconstruction and mapping communication pathways between grafted and host neurons can be achieved by monosynaptic tracing with viral vectors. The cutting-edge toolbox presented here holds immense promise for elucidating the impact of cell therapy on neural circuitry and guiding the development of more effective treatments for neurological disorders.
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Affiliation(s)
- Ana Gonzalez-Ramos
- Stanley Center for Psychiatric Research at Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Claudia Puigsasllosas-Pastor
- Laboratory of Neural Stem Cells and Brain Damage, Department of Biomedical Sciences, Institute of Neurosciences, University of Barcelona, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
| | - Ainhoa Arcas-Marquez
- Laboratory of Neural Stem Cells and Brain Damage, Department of Biomedical Sciences, Institute of Neurosciences, University of Barcelona, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
| | - Daniel Tornero
- Laboratory of Neural Stem Cells and Brain Damage, Department of Biomedical Sciences, Institute of Neurosciences, University of Barcelona, 08036 Barcelona, Spain
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28029 Madrid, Spain
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5
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Lemini C, García-Albor E, Cruz-López B, Matamoros-Trejo G, Márquez-Baltazar S, Herrera-Pérez JJ, Martínez-Mota L. Prolame produces anxiolytic- and antidepressant-like effects in middle-aged female rats with less uterotrophic effects than 17β-estradiol. Eur J Pharmacol 2024; 969:176454. [PMID: 38417607 DOI: 10.1016/j.ejphar.2024.176454] [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: 10/16/2023] [Revised: 01/29/2024] [Accepted: 02/20/2024] [Indexed: 03/01/2024]
Abstract
Estrogen hormone replacement therapy (EHRT), improving women's life quality at menopause, reduces anxiety and depression symptoms associated with ovarian hormonal decline. However, its potential adverse effects, like thromboembolism and cancer risk, limit its use. Prolame is a synthetic 17β-amino estrogen with antithrombotic actions that exerts anxiolytic- and antidepressant-like effects on young adult ovariectomized female rats. It is unknown if prolame's effects may be observed in age and endocrine conditions emulating menopause. This study aimed to identify the antidepressant- and anxiolytic-like effects of prolame and E2 (used as a reference estrogen treatment) in middle-aged female rats coursing with irregular cycles, in two different conditions: ovariectomized or gonadally intact. Results were compared with those from young adult ovariectomized rats. Prolame (60 or 120 μg/kg), 17β-estradiol (E2, 40 or 80 μg/kg), or vehicle were chronically administered, and their effects were evaluated in the elevated plus-maze, defensive burying behavior test, open field test, and forced swimming test. Uterotrophic actions were estimated by uterine weight related to body weight. Prolame and E2 produced robust anxiolytic- and antidepressant-like effects in young adult ovariectomized rats, but these effects were absent in gonadally intact middle-aged rats. Interestingly, only prolame induced anxiolytic- and antidepressant-like effects in middle-aged ovariectomized rats. Uterotrophic effects of prolame were weaker than E2 effects, notably in middle-aged females. Altogether, present data support the notion that prolame has the potential to be considered an EHRT with relevant psychoactive actions and with apparently lower adverse-side effects, especially in middle-aged populations.
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Affiliation(s)
- C Lemini
- Departamento de Farmacología, Facultad de Medicina. Universidad Nacional Autónoma de México. Av. Universidad No. 3000, Ciudad Universitaria, Coyoacán, 04360, Ciudad de México, México
| | - E García-Albor
- Laboratorio de Farmacología Conductual, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz. Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, Tlalpan, 14370, Ciudad de México, México
| | - B Cruz-López
- Laboratorio Integrativo para el Estudio de Sustancias Inhalables Adictivas, Dirección de Investigaciones en Neurociencias. Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz. Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, Tlalpan, 14370, Ciudad de México, México
| | - G Matamoros-Trejo
- Laboratorio de Neurofisiología Molecular, Dirección de Investigaciones en Neurociencias. Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz. Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, Tlalpan, 14370, Ciudad de México, México
| | - S Márquez-Baltazar
- Laboratorio de Farmacología Conductual, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz. Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, Tlalpan, 14370, Ciudad de México, México
| | - J J Herrera-Pérez
- Laboratorio de Farmacología Conductual, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz. Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, Tlalpan, 14370, Ciudad de México, México
| | - L Martínez-Mota
- Laboratorio de Farmacología Conductual, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz. Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, Tlalpan, 14370, Ciudad de México, México.
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6
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Chaves T, Török B, Fazekas CL, Correia P, Sipos E, Várkonyi D, Tóth ZE, Dóra F, Dobolyi Á, Zelena D. The Dopaminergic Cells in the Median Raphe Region Regulate Social Behavior in Male Mice. Int J Mol Sci 2024; 25:4315. [PMID: 38673899 PMCID: PMC11050709 DOI: 10.3390/ijms25084315] [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: 03/19/2024] [Revised: 04/08/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024] Open
Abstract
According to previous studies, the median raphe region (MRR) is known to contribute significantly to social behavior. Besides serotonin, there have also been reports of a small population of dopaminergic neurons in this region. Dopamine is linked to reward and locomotion, but very little is known about its role in the MRR. To address that, we first confirmed the presence of dopaminergic cells in the MRR of mice (immunohistochemistry, RT-PCR), and then also in humans (RT-PCR) using healthy donor samples to prove translational relevance. Next, we used chemogenetic technology in mice containing the Cre enzyme under the promoter of the dopamine transporter. With the help of an adeno-associated virus, designer receptors exclusively activated by designer drugs (DREADDs) were expressed in the dopaminergic cells of the MRR to manipulate their activity. Four weeks later, we performed an extensive behavioral characterization 30 min after the injection of the artificial ligand (Clozapine-N-Oxide). Stimulation of the dopaminergic cells in the MRR decreased social interest without influencing aggression and with an increase in social discrimination. Additionally, inhibition of the same cells increased the friendly social behavior during social interaction test. No behavioral changes were detected in anxiety, memory or locomotion. All in all, dopaminergic cells were present in both the mouse and human samples from the MRR, and the manipulation of the dopaminergic neurons in the MRR elicited a specific social response.
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Affiliation(s)
- Tiago Chaves
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (T.C.); (B.T.); (C.L.F.); (P.C.); (D.V.)
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, H1083 Budapest, Hungary;
- János Szentágothai School of Neurosciences, Semmelweis University, H1085 Budapest, Hungary
| | - Bibiána Török
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (T.C.); (B.T.); (C.L.F.); (P.C.); (D.V.)
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, H1083 Budapest, Hungary;
- János Szentágothai School of Neurosciences, Semmelweis University, H1085 Budapest, Hungary
| | - Csilla Lea Fazekas
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (T.C.); (B.T.); (C.L.F.); (P.C.); (D.V.)
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, H1083 Budapest, Hungary;
- János Szentágothai School of Neurosciences, Semmelweis University, H1085 Budapest, Hungary
| | - Pedro Correia
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (T.C.); (B.T.); (C.L.F.); (P.C.); (D.V.)
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, H1083 Budapest, Hungary;
- János Szentágothai School of Neurosciences, Semmelweis University, H1085 Budapest, Hungary
| | - Eszter Sipos
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, H1083 Budapest, Hungary;
| | - Dorottya Várkonyi
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (T.C.); (B.T.); (C.L.F.); (P.C.); (D.V.)
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, H1083 Budapest, Hungary;
| | - Zsuzsanna E. Tóth
- Laboratory of Neuroendocrinology and in Situ Hybridization, Department of Anatomy, Histology and Embryology, Semmelweis University, H1094 Budapest, Hungary;
| | - Fanni Dóra
- Human Brain Tissue Bank, Laboratory of Neuromorphology, Department of Anatomy, Histology and Embryology, Semmelweis University, H1094 Budapest, Hungary;
| | - Árpád Dobolyi
- Laboratory of Molecular and Systems Neurobiology, Department of Physiology and Neurobiology, Eötvös Loránd University, H1117 Budapest, Hungary;
| | - Dóra Zelena
- Institute of Physiology, Medical School, Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, H7624 Pécs, Hungary; (T.C.); (B.T.); (C.L.F.); (P.C.); (D.V.)
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, H1083 Budapest, Hungary;
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7
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Mitsui K, Takahashi A. Aggression modulator: Understanding the multifaceted role of the dorsal raphe nucleus. Bioessays 2024; 46:e2300213. [PMID: 38314963 DOI: 10.1002/bies.202300213] [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: 11/03/2023] [Revised: 01/17/2024] [Accepted: 01/18/2024] [Indexed: 02/07/2024]
Abstract
Aggressive behavior is instinctively driven behavior that helps animals to survive and reproduce and is closely related to multiple behavioral and physiological processes. The dorsal raphe nucleus (DRN) is an evolutionarily conserved midbrain structure that regulates aggressive behavior by integrating diverse brain inputs. The DRN consists predominantly of serotonergic (5-HT:5-hydroxytryptamine) neurons and decreased 5-HT activity was classically thought to increase aggression. However, recent studies challenge this 5-HT deficiency model, revealing a more complex role for the DRN 5-HT system in aggression. Furthermore, emerging evidence has shown that non-5-HT populations in the DRN and specific neural circuits contribute to the escalation of aggressive behavior. This review argues that the DRN serves as a multifaceted modulator of aggression, acting not only via 5-HT but also via other neurotransmitters and neural pathways, as well as different subsets of 5-HT neurons. In addition, we discuss the contribution of DRN neurons in the behavioral and physiological aspects implicated in aggressive behavior, such as arousal, reward, and impulsivity, to further our understanding of DRN-mediated aggression modulation.
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Affiliation(s)
- Koshiro Mitsui
- Laboratory of Behavioral Neurobiology, University of Tsukuba, Tsukuba, Ibaraki, Japan
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Aki Takahashi
- Laboratory of Behavioral Neurobiology, University of Tsukuba, Tsukuba, Ibaraki, Japan
- Institute of Human Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
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8
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Lee KKY, Chattopadhyaya B, do Nascimento ASF, Moquin L, Rosa-Neto P, Amilhon B, Di Cristo G. Neonatal hypoxia impairs serotonin release and cognitive functions in adult mice. Neurobiol Dis 2024; 193:106465. [PMID: 38460800 DOI: 10.1016/j.nbd.2024.106465] [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: 08/04/2023] [Revised: 03/03/2024] [Accepted: 03/04/2024] [Indexed: 03/11/2024] Open
Abstract
Children who experienced moderate perinatal asphyxia (MPA) are at risk of developing long lasting subtle cognitive and behavioral deficits, including learning disabilities and emotional problems. The prefrontal cortex (PFC) regulates cognitive flexibility and emotional behavior. Neurons that release serotonin (5-HT) project to the PFC, and compounds modulating 5-HT activity influence emotion and cognition. Whether 5-HT dysregulations contribute to MPA-induced cognitive problems is unknown. We established a MPA mouse model, which displays recognition and spatial memory impairments and dysfunctional cognitive flexibility. We found that 5-HT expression levels, quantified by immunohistochemistry, and 5-HT release, quantified by in vivo microdialysis in awake mice, are reduced in PFC of adult MPA mice. MPA mice also show impaired body temperature regulation following injection of the 5-HT1A receptor agonist 8-OH-DPAT, suggesting the presence of deficits in 5-HT auto-receptor function on raphe neurons. Finally, chronic treatment of adult MPA mice with fluoxetine, an inhibitor of 5-HT reuptake transporter, or the 5-HT1A receptor agonist tandospirone rescues cognitive flexibility and memory impairments. All together, these data demonstrate that the development of 5-HT system function is vulnerable to moderate perinatal asphyxia. 5-HT hypofunction might in turn contribute to long-term cognitive impairment in adulthood, indicating a potential target for pharmacological therapies.
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Affiliation(s)
- Karen Ka Yan Lee
- Neurosciences Department, Université de Montréal, Montréal, Canada; CHU Sainte-Justine Azrieli Research Center, Montréal, Canada
| | | | | | - Luc Moquin
- Department of Psychiatry, McGill University, Douglas Hospital Research Center, Canada
| | - Pedro Rosa-Neto
- Department of Psychiatry, McGill University, Douglas Hospital Research Center, Canada
| | - Bénédicte Amilhon
- Neurosciences Department, Université de Montréal, Montréal, Canada; CHU Sainte-Justine Azrieli Research Center, Montréal, Canada.
| | - Graziella Di Cristo
- Neurosciences Department, Université de Montréal, Montréal, Canada; CHU Sainte-Justine Azrieli Research Center, Montréal, Canada.
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9
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Bremshey S, Groß J, Renken K, Masseck OA. The role of serotonin in depression-A historical roundup and future directions. J Neurochem 2024. [PMID: 38477031 DOI: 10.1111/jnc.16097] [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: 10/30/2023] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 03/14/2024]
Abstract
Depression is one of the most common psychiatric disorders worldwide, affecting approximately 280 million people, with probably much higher unrecorded cases. Depression is associated with symptoms such as anhedonia, feelings of hopelessness, sleep disturbances, and even suicidal thoughts. Tragically, more than 700 000 people commit suicide each year. Although depression has been studied for many decades, the exact mechanisms that lead to depression are still unknown, and available treatments only help a fraction of patients. In the late 1960s, the serotonin hypothesis was published, suggesting that serotonin is the key player in depressive disorders. However, this hypothesis is being increasingly doubted as there is evidence for the influence of other neurotransmitters, such as noradrenaline, glutamate, and dopamine, as well as larger systemic causes such as altered activity in the limbic network or inflammatory processes. In this narrative review, we aim to contribute to the ongoing debate on the involvement of serotonin in depression. We will review the evolution of antidepressant treatments, systemic research on depression over the years, and future research applications that will help to bridge the gap between systemic research and neurotransmitter dynamics using biosensors. These new tools in combination with systemic applications, will in the future provide a deeper understanding of the serotonergic dynamics in depression.
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Affiliation(s)
- Svenja Bremshey
- Synthetic Biology, University of Bremen, Bremen, Germany
- Neuropharmacology, University of Bremen, Bremen, Germany
| | - Juliana Groß
- Synthetic Biology, University of Bremen, Bremen, Germany
| | - Kim Renken
- Synthetic Biology, University of Bremen, Bremen, Germany
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10
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Hou X, Jing J, Jiang Y, Huang X, Xian Q, Lei T, Zhu J, Wong KF, Zhao X, Su M, Li D, Liu L, Qiu Z, Sun L. Nanobubble-actuated ultrasound neuromodulation for selectively shaping behavior in mice. Nat Commun 2024; 15:2253. [PMID: 38480733 PMCID: PMC10937988 DOI: 10.1038/s41467-024-46461-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 02/28/2024] [Indexed: 03/17/2024] Open
Abstract
Ultrasound is an acoustic wave which can noninvasively penetrate the skull to deep brain regions, enabling neuromodulation. However, conventional ultrasound's spatial resolution is diffraction-limited and low-precision. Here, we report acoustic nanobubble-mediated ultrasound stimulation capable of localizing ultrasound's effects to only the desired brain region in male mice. By varying the delivery site of nanobubbles, ultrasound could activate specific regions of the mouse motor cortex, evoking EMG signaling and limb movement, and could also, separately, activate one of two nearby deep brain regions to elicit distinct behaviors (freezing or rotation). Sonicated neurons displayed reversible, low-latency calcium responses and increased c-Fos expression in the sub-millimeter-scale region with nanobubbles present. Ultrasound stimulation of the relevant region also modified depression-like behavior in a mouse model. We also provide evidence of a role for mechanosensitive ion channels. Altogether, our treatment scheme allows spatially-targetable, repeatable and temporally-precise activation of deep brain circuits for neuromodulation without needing genetic modification.
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Affiliation(s)
- Xuandi Hou
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China
| | - Jianing Jing
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China
| | - Yizhou Jiang
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China
| | - Xiaohui Huang
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China
| | - Quanxiang Xian
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China
| | - Ting Lei
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China
| | - Jiejun Zhu
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China
- Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, 519031, Guangdong, China
| | - Kin Fung Wong
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China
| | - Xinyi Zhao
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China
| | - Min Su
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China
| | - Danni Li
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China
| | - Langzhou Liu
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China
| | - Zhihai Qiu
- Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, 519031, Guangdong, China
| | - Lei Sun
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, 999077, Hong Kong SAR, PR China.
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11
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Shibayama K, Nakajo H, Tanimoto Y, Kakinuma H, Shiraki T, Tsuboi T, Okamoto H. The serotonergic neurons derived from rhombomere 2 are localized in the median raphe and project to the dorsal pallium in zebrafish. Neurosci Res 2024:S0168-0102(24)00039-7. [PMID: 38447890 DOI: 10.1016/j.neures.2024.03.001] [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: 02/08/2024] [Revised: 02/29/2024] [Accepted: 03/03/2024] [Indexed: 03/08/2024]
Abstract
The serotonergic neurons in the raphe nucleus are implicated in various cognitive functions such as learning and emotion. In vertebrates, the raphe nucleus is divided into the dorsal raphe and the median raphe. In contrast to the abundance of knowledge on the functions of the dorsal raphe, the roles of the serotonergic neurons in the median raphe are relatively unknown. The studies using zebrafish revealed that the median raphe serotonergic neurons receive input from the two distinct pathways from the habenula and the IPN. The use of zebrafish may reveal the function of the Hb-IPN-median raphe pathway. To clarify the functions of the median raphe serotonergic neurons, it is necessary to distinguish them from those in the dorsal raphe. Most median raphe serotonergic neurons originate from rhombomere 2 in mice, and we generated the transgenic zebrafish which can label the serotonergic neurons derived from rhombomere 2. In this study, we found the serotonergic neurons derived from rhombomere 2 are localized in the median raphe and project axons to the rostral dorsal pallium in zebrafish. This study suggests that this transgenic system has the potential to specifically reveal the function and information processing of the Hb-IPN-raphe-telencephalon circuit in learning.
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Affiliation(s)
- Kotaro Shibayama
- Laboratory for Neural Circuit Dynamics of Decision-making, RIKEN Center for Brain Science, Saitama 351-0198, Japan; Department of Life Sciences, Graduate School of Arts and Science, The University of Tokyo, Tokyo 153-8902, Japan
| | - Haruna Nakajo
- Laboratory for Neural Circuit Dynamics of Decision-making, RIKEN Center for Brain Science, Saitama 351-0198, Japan; Department of Life Sciences, Graduate School of Arts and Science, The University of Tokyo, Tokyo 153-8902, Japan
| | - Yuki Tanimoto
- Laboratory for Neural Circuit Dynamics of Decision-making, RIKEN Center for Brain Science, Saitama 351-0198, Japan
| | - Hisaya Kakinuma
- Laboratory for Neural Circuit Dynamics of Decision-making, RIKEN Center for Brain Science, Saitama 351-0198, Japan
| | - Toshiyuki Shiraki
- Research Resources Division, RIKEN Center for Brain Science, Saitama 351-0198, Japan
| | - Takashi Tsuboi
- Department of Life Sciences, Graduate School of Arts and Science, The University of Tokyo, Tokyo 153-8902, Japan
| | - Hitoshi Okamoto
- Laboratory for Neural Circuit Dynamics of Decision-making, RIKEN Center for Brain Science, Saitama 351-0198, Japan; Department of Life Sciences, Graduate School of Arts and Science, The University of Tokyo, Tokyo 153-8902, Japan; RIKEN CBS-Kao Collaboration Center, Saitama 351-0198, Japan; Lead contact.
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12
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Ogelman R, Gomez Wulschner LE, Hoelscher VM, Hwang IW, Chang VN, Oh WC. Serotonin modulates excitatory synapse maturation in the developing prefrontal cortex. Nat Commun 2024; 15:1368. [PMID: 38365905 PMCID: PMC10873381 DOI: 10.1038/s41467-024-45734-w] [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: 04/21/2023] [Accepted: 02/02/2024] [Indexed: 02/18/2024] Open
Abstract
Serotonin (5-HT) imbalances in the developing prefrontal cortex (PFC) are linked to long-term behavioral deficits. However, the synaptic mechanisms underlying 5-HT-mediated PFC development are unknown. We found that chemogenetic suppression and enhancement of 5-HT release in the PFC during the first two postnatal weeks decreased and increased the density and strength of excitatory spine synapses, respectively, on prefrontal layer 2/3 pyramidal neurons in mice. 5-HT release on single spines induced structural and functional long-term potentiation (LTP), requiring both 5-HT2A and 5-HT7 receptor signals, in a glutamatergic activity-independent manner. Notably, LTP-inducing 5-HT stimuli increased the long-term survival of newly formed spines ( ≥ 6 h) via 5-HT7 Gαs activation. Chronic treatment of mice with fluoxetine, a selective serotonin-reuptake inhibitor, during the first two weeks, but not the third week of postnatal development, increased the density and strength of excitatory synapses. The effect of fluoxetine on PFC synaptic alterations in vivo was abolished by 5-HT2A and 5-HT7 receptor antagonists. Our data describe a molecular basis of 5-HT-dependent excitatory synaptic plasticity at the level of single spines in the PFC during early postnatal development.
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Affiliation(s)
- Roberto Ogelman
- Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Luis E Gomez Wulschner
- Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Victoria M Hoelscher
- Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - In-Wook Hwang
- Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Victoria N Chang
- Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Won Chan Oh
- Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, 80045, USA.
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13
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Kang SJ, Kim JH, Kim DI, Roberts BZ, Han S. A pontomesencephalic PACAPergic pathway underlying panic-like behavioral and somatic symptoms in mice. Nat Neurosci 2024; 27:90-101. [PMID: 38177337 PMCID: PMC11195305 DOI: 10.1038/s41593-023-01504-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 10/19/2023] [Indexed: 01/06/2024]
Abstract
Panic disorder is characterized by uncontrollable fear accompanied by somatic symptoms that distinguish it from other anxiety disorders. Neural mechanisms underlying these unique symptoms are not completely understood. Here, we report that the pituitary adenylate cyclase-activating polypeptide (PACAP)-expressing neurons in the lateral parabrachial nucleus projecting to the dorsal raphe are crucial for panic-like behavioral and physiological alterations. These neurons are activated by panicogenic stimuli but inhibited in conditioned fear and anxiogenic conditions. Activating these neurons elicits strong defensive behaviors and rapid cardiorespiratory increase without creating aversive memory, whereas inhibiting them attenuates panic-associated symptoms. Chemogenetic or pharmacological inhibition of downstream PACAP receptor-expressing dorsal raphe neurons abolishes panic-like symptoms. The pontomesencephalic PACAPergic pathway is therefore a likely mediator of panicogenesis, and may be a promising therapeutic target for treating panic disorder.
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Affiliation(s)
- Sukjae J Kang
- Peptide Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Jong-Hyun Kim
- Peptide Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, USA
- Center for Cognition and Sociality, Institute for Basic Science, Daejeon, Republic of Korea
| | - Dong-Il Kim
- Peptide Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Benjamin Z Roberts
- Peptide Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, USA
- Neuroscience Graduate Program, University of California San Diego, La Jolla, CA, USA
| | - Sung Han
- Peptide Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, USA.
- Neuroscience Graduate Program, University of California San Diego, La Jolla, CA, USA.
- Center for Neuroscience Imaging Research, Institute for Basic Science, Suwon, Republic of Korea.
- Department of Biomedical Engineering, Sungkyunkwan University, Suwon, Republic of Korea.
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14
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Martin H, Coursan A, Lallement J, Di Miceli M, Kandiah J, Raho I, Buttler J, Guilloux JP, De Deurwaerdere P, Layé S, Routh VH, Guiard BP, Magnan C, Cruciani-Guglielmacci C, Fioramonti X. Serotonergic neurons are involved in the counter-regulatory response to hypoglycemia. J Neuroendocrinol 2023; 35:e13344. [PMID: 37857383 DOI: 10.1111/jne.13344] [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: 07/11/2023] [Revised: 08/30/2023] [Accepted: 09/12/2023] [Indexed: 10/21/2023]
Abstract
OBJECTIVES Intensive insulin therapy provides optimal glycemic control in patients with diabetes. However, intensive insulin therapy causes so-called iatrogenic hypoglycemia as a major adverse effect. The ventromedial hypothalamus (VMH) has been described as the primary brain area initiating the counter-regulatory response (CRR). Nevertheless, the VMH receives projections from other brain areas which could participate in the regulation of the CRR. In particular, studies suggest a potential role of the serotonin (5-HT) network. Thus, the objective of this study was to determine the contribution of 5-HT neurons in CRR control. METHODS Complementary approaches have been used to test this hypothesis in quantifying the level of 5-HT in several brain areas by HPLC in response to insulin-induced hypoglycemia, measuring the electrical activity of dorsal raphe (DR) 5-HT neurons in response to insulin or decreased glucose level by patch-clamp electrophysiology; and measuring the CRR hormone glucagon as an index of the CRR to the modulation of the activity of 5-HT neurons using pharmacological or pharmacogenetic approaches. RESULTS HPLC measurements show that the 5HIAA/5HT ratio is increased in several brain regions including the VMH in response to insulin-induced hypoglycemia. Patch-clamp electrophysiological recordings show that insulin, but not decreased glucose level, increases the firing frequency of DR 5-HT neurons in the DR. In vivo, both the pharmacological inhibition of 5-HT neurons by intraperitoneal injection of the 5-HT1A receptor agonist 8-OH-DPAT or the chemogenetic inhibition of these neurons reduce glucagon secretion, suggesting an impaired CRR. CONCLUSION Taken together, these data highlight a new neuronal network involved in the regulation of the CRR. In particular, this study shows that DR 5-HT neurons detect iatrogenic hypoglycemia in response to the increased insulin level and may play an important role in the regulation of CRR.
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Affiliation(s)
- Hugo Martin
- Université Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, Bordeaux, France
| | - Adeline Coursan
- Université Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, Bordeaux, France
| | | | - Mathieu Di Miceli
- Worcester Biomedical Research Group, School of Science and the Environment, University of Worcester, Worcester, UK
| | - Janany Kandiah
- Université Paris Cité, BFA, UMR 8251, CNRS, Paris, France
| | - Ilyès Raho
- Université Paris Cité, BFA, UMR 8251, CNRS, Paris, France
| | - Jasmine Buttler
- INCIA, UMR CNRS, Bordeaux University, Neurocampus, Bordeaux, France
| | | | | | - Sophie Layé
- Université Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, Bordeaux, France
| | - Vanessa H Routh
- Department of Pharmacology, Physiology and Neuroscience, Rutgers, New Jersey Medical School, The State University of New Jersey, Newark, New Jersey, USA
| | - Bruno P Guiard
- Centre de Recherches sur la Cognition Animale (CRCA), Centre de Biologie Intégrative (CBI), Toulouse, France
| | | | | | - Xavier Fioramonti
- Université Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, Bordeaux, France
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15
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Troconis EL, Seo C, Guru A, Warden MR. Serotonin neurons in mating female mice are activated by male ejaculation. Curr Biol 2023; 33:4926-4936.e4. [PMID: 37865094 PMCID: PMC10901455 DOI: 10.1016/j.cub.2023.09.071] [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: 05/17/2023] [Revised: 08/31/2023] [Accepted: 09/28/2023] [Indexed: 10/23/2023]
Abstract
Sexual stimulation triggers changes in female physiology and behavior, including sexual satiety and preparing the uterus for pregnancy. Serotonin (5-HT) is an important regulator of reproductive physiology and sexual receptivity, but the relationship between sexual stimulation and 5-HT neural activity in females is poorly understood. Here, we investigated dorsal raphe 5-HT neural activity in female mice during sexual behavior. We found that 5-HT neural activity in mating females peaked specifically upon male ejaculation and remained elevated above baseline until disengagement. Artificial intravaginal mechanical stimulation was sufficient to elicit increased 5-HT neural activity but the delivery of ejaculatory fluids was not. Distal penis expansion ("penile cupping") at ejaculation and forceful expulsion of ejaculatory fluid each provided sufficient mechanical stimulation to elicit 5-HT neuron activation. Our study identifies a female ejaculation-specific signal in a major neuromodulatory system and shows that intravaginal mechanosensory stimulation is necessary and sufficient to drive this signal.
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Affiliation(s)
- Eileen L Troconis
- Biological and Biomedical Sciences Program, Cornell University, Ithaca, NY 14853, USA
| | - Changwoo Seo
- Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853, USA; Cornell Neurotech, Cornell University, Ithaca, NY 14853, USA
| | - Akash Guru
- Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853, USA; Cornell Neurotech, Cornell University, Ithaca, NY 14853, USA
| | - Melissa R Warden
- Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853, USA; Cornell Neurotech, Cornell University, Ithaca, NY 14853, USA.
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16
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Collins SA, Stinson HE, Himes A, Nestor-Kalinoski A, Ninan I. Sex-specific modulation of the medial prefrontal cortex by glutamatergic median raphe neurons. SCIENCE ADVANCES 2023; 9:eadg4800. [PMID: 37948526 PMCID: PMC10637752 DOI: 10.1126/sciadv.adg4800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 10/13/2023] [Indexed: 11/12/2023]
Abstract
A substantial proportion of raphe neurons are glutamatergic. However, little is known about how these glutamatergic neurons modulate the forebrain. We investigated how glutamatergic median raphe nucleus (MRN) input modulates the medial prefrontal cortex (mPFC), a critical component of fear circuitry. We show that vesicular glutamate transporter 3 (VGLUT3)-expressing MRN neurons activate VGLUT3- and somatostatin-expressing neurons in the mPFC. Consistent with this modulation of mPFC GABAergic neurons, activation of MRN (VGLUT3) neurons enhances GABAergic transmission in mPFC pyramidal neurons and attenuates fear memory in female but not male mice. Serotonin plays a key role in MRN (VGLUT3) neuron-mediated GABAergic plasticity in the mPFC. In agreement with these female-specific effects, we observed sex differences in glutamatergic transmission onto MRN (VGLUT3) neurons and in mPFC (VGLUT3) neuron-mediated dual release of glutamate and GABA. Our results demonstrate a cell type-specific modulation of the mPFC by MRN (VGLUT3) neurons and reveal a sex-specific role of this neuromodulation in mPFC synaptic plasticity.
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Affiliation(s)
- Stuart A. Collins
- Department of Neurosciences, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Hannah E. Stinson
- Department of Neurosciences, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Amanda Himes
- Department of Neurosciences, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Andrea Nestor-Kalinoski
- Department of Surgery, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Ipe Ninan
- Department of Neurosciences, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
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17
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Collins SA, Stinson HE, Himes A, Ninan I. Sex-specific modulation of the medial prefrontal cortex by glutamatergic median raphe neurons. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.30.555555. [PMID: 37693545 PMCID: PMC10491205 DOI: 10.1101/2023.08.30.555555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
The current understanding of the neuromodulatory role of the median raphe nucleus (MRN) is primarily based on its putative serotonergic output. However, a significant proportion of raphe neurons are glutamatergic. The present study investigated how glutamatergic MRN input modulates the medial prefrontal cortex (mPFC), a critical component of the fear circuitry. Our studies show that VGLUT3-expressing MRN neurons modulate VGLUT3- and somatostatin-expressing neurons in the mPFC. Consistent with this modulation of mPFC GABAergic neurons, activation of MRN (VGLUT3) neurons suppresses mPFC pyramidal neuron activity and attenuates fear memory in female but not male mice. In agreement with these female-specific effects, we observed sex differences in glutamatergic transmission onto MRN (VGLUT3) neurons and mPFC (VGLUT3) neuron-mediated dual release of glutamate and GABA. Thus, our results demonstrate a cell type-specific modulation of the mPFC by MRN (VGLUT3) neurons and reveal a sex-specific role of this neuromodulation in mPFC synaptic plasticity and fear memory.
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Affiliation(s)
| | | | - Amanda Himes
- Department of Neurosciences, University of Toledo, Toledo, Ohio
| | - Ipe Ninan
- Department of Neurosciences, University of Toledo, Toledo, Ohio
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18
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Wallace ML, Sabatini BL. Synaptic and circuit functions of multitransmitter neurons in the mammalian brain. Neuron 2023; 111:2969-2983. [PMID: 37463580 PMCID: PMC10592565 DOI: 10.1016/j.neuron.2023.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/31/2023] [Accepted: 06/08/2023] [Indexed: 07/20/2023]
Abstract
Neurons in the mammalian brain are not limited to releasing a single neurotransmitter but often release multiple neurotransmitters onto postsynaptic cells. Here, we review recent findings of multitransmitter neurons found throughout the mammalian central nervous system. We highlight recent technological innovations that have made the identification of new multitransmitter neurons and the study of their synaptic properties possible. We also focus on mechanisms and molecular constituents required for neurotransmitter corelease at the axon terminal and synaptic vesicle, as well as some possible functions of multitransmitter neurons in diverse brain circuits. We expect that these approaches will lead to new insights into the mechanism and function of multitransmitter neurons, their role in circuits, and their contribution to normal and pathological brain function.
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Affiliation(s)
- Michael L Wallace
- Department of Anatomy and Neurobiology, Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA.
| | - Bernardo L Sabatini
- Howard Hughes Medical Institute, Department of Neurobiology, Harvard Medical School, Boston, MA, USA
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19
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Gribkova ED, Lee CA, Brown JW, Cui J, Liu Y, Norekian T, Gillette R. A common modular design of nervous systems originating in soft-bodied invertebrates. Front Physiol 2023; 14:1263453. [PMID: 37854468 PMCID: PMC10579582 DOI: 10.3389/fphys.2023.1263453] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 09/12/2023] [Indexed: 10/20/2023] Open
Abstract
Nervous systems of vertebrates and invertebrates show a common modular theme in the flow of information for cost-benefit decisions. Sensory inputs are incentivized by integrating stimulus qualities with motivation and memory to affect appetitive state, a system of homeostatic drives, and labelled for directionality. Appetitive state determines action responses from a repertory of possibles and transmits the decision to a premotor system that frames the selected action in motor arousal and appropriate postural and locomotion commands. These commands are then sent to the primary motor pattern generators controlling the motorneurons, with feedback at each stage. In the vertebrates, these stages are mediated by forebrain pallial derivatives for incentive and directionality (olfactory bulb, cerebral cortex, pallial amygdala, etc.) interacting with hypothalamus (homeostasis, motivation, and reward) for action selection in the forebrain basal ganglia, the mid/hindbrain reticular formation as a premotor translator for posture, locomotion, and arousal state, and the spinal cord and cranial nuclei as primary motor pattern generators. Gastropods, like the predatory sea slug Pleurobranchaea californica, show a similar organization but with differences that suggest how complex brains evolved from an ancestral soft-bodied bilaterian along with segmentation, jointed skeletons, and complex exteroceptors. Their premotor feeding network combines functions of hypothalamus and basal ganglia for homeostasis, motivation, presumed reward, and action selection for stimulus approach or avoidance. In Pleurobranchaea, the premotor analogy to the vertebrate reticular formation is the bilateral "A-cluster" of cerebral ganglion neurons that controls posture, locomotion, and serotonergic motor arousal. The A-cluster transmits motor commands to the pedal ganglia analogs of the spinal cord, for primary patterned motor output. Apparent pallial precursors are not immediately evident in Pleurobranchaea's central nervous system, but a notable candidate is a subepithelial nerve net in the peripheral head region that integrates chemotactile stimuli for incentive and directionality. Evolutionary centralization of its computational functions may have led to the olfaction-derived pallial forebrain in the ancestor's vertebrate descendants and their analogs in arthropods and annelids.
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Affiliation(s)
- Ekaterina D. Gribkova
- Coordinated Science Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Colin A. Lee
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Jeffrey W. Brown
- Stanson Toshok Center for Brain Function and Repair, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
| | - Jilai Cui
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Yichen Liu
- Department of Molecular & Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Tigran Norekian
- Whitney Laboratory for Marine Biosciences, University of Florida, St. Augustine, FL, United States
| | - Rhanor Gillette
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, United States
- Department of Molecular & Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
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20
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Troconis EL, Seo C, Guru A, Warden MR. Serotonin neurons in mating female mice are activated by male ejaculation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.14.540716. [PMID: 37645786 PMCID: PMC10461921 DOI: 10.1101/2023.05.14.540716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Sexual stimulation triggers changes in female physiology and behavior, including sexual satiety and preparing the uterus for pregnancy. Serotonin is an important regulator of reproductive physiology and sexual receptivity, but the relationship between sexual stimulation and serotonin neural activity in females is poorly understood. Here, we investigated dorsal raphe serotonin neural activity in females during sexual behavior. We found that serotonin neural activity in mating females peaked specifically upon male ejaculation, and remained elevated above baseline until disengagement. Artificial intravaginal mechanical stimulation was sufficient to elicit increased 5-HT neural activity but the delivery of ejaculatory fluids was not. Distal penis erectile enlargement ("penile cupping") at ejaculation and forceful expulsion of ejaculatory fluid each provided sufficient mechanical stimulation to elicit serotonin neuron activation. Our study identifies a female ejaculation-specific signal in a major neuromodulatory system and shows that intravaginal mechanosensory stimulation is necessary and sufficient to drive this signal.
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Affiliation(s)
- Eileen L. Troconis
- Department of Biological and Biomedical Sciences, Cornell University, Ithaca, NY 14853 USA
| | - Changwoo Seo
- Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853 USA
- Cornell Neurotech, Cornell University, Ithaca, NY 14853 USA
| | - Akash Guru
- Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853 USA
- Cornell Neurotech, Cornell University, Ithaca, NY 14853 USA
| | - Melissa R. Warden
- Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853 USA
- Cornell Neurotech, Cornell University, Ithaca, NY 14853 USA
- Lead Contact
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21
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Higuchi Y, Tada T, Nakachi T, Arakawa H. Serotonergic circuit dysregulation underlying autism-related phenotypes in BTBR mouse model of autism. Neuropharmacology 2023:109634. [PMID: 37301467 DOI: 10.1016/j.neuropharm.2023.109634] [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: 03/28/2023] [Revised: 06/05/2023] [Accepted: 06/08/2023] [Indexed: 06/12/2023]
Abstract
The inbred mouse strain, BTBR T+Itpr3tf/J (BTBR), possesses neuronal and circuit abnormalities that underlie atypical behavioral profiles resembling the major symptoms of human autism spectrum disorder (ASD). Forebrain serotonin (5-HT) transmission has been implicated in ASD-related behavioral alterations. In this study, we assessed 5-HT signals and the functional responsiveness in BTBR mice compared to standard C57BL/6J (B6) control mice to elucidate how 5-HT alterations contribute to behavioral abnormalities in BTBR mice. A lower number of 5-HT neurons in the median raphe, but not in the dorsal raphe, was observed in male and female BTBR mice. Acute systemic injection of buspirone, a 5-HT1A receptor agonist, induced c-Fos in several brain regions in both B6 and BTBR mice; however, blunted c-Fos induction in BTBR mice was documented in the cingulate cortex, basolateral amygdala (BLA), and ventral hippocampus (Hipp). Decreased c-Fos responses in these regions are associated with a lack of buspirone effects on anxiety-like behavior in BTBR mice. Analysis of mRNA expression following acute buspirone injection indicated that 5HTR1a gene downregulation (or upregulation) occurred in the BLA and Hipp of B6 mice, respectively, but not BTBR mice. The mRNA expression of factors associated with neurogenesis or the pro-inflammatory state was not consistently altered by acute buspirone injection. Therefore, 5-HT responsivity via 5-HT1A receptors in the BLA and Hipp are linked to anxiety-like behavior, in which circuits are disrupted in BTBR mice. Other distinct 5-HT circuits from the BLA and Hipp that regulate social behavior are restricted but preserved in BTBR mice.
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Affiliation(s)
- Yuki Higuchi
- Dept. Systems Physiology, Graduate School of Medicine, University of the Ryukyus, Japan
| | - Tomoaki Tada
- Dept. Systems Physiology, Faculty of Medicine, University of the Ryukyus, Japan
| | - Taiga Nakachi
- Dept. Systems Physiology, Faculty of Medicine, University of the Ryukyus, Japan
| | - Hiroyuki Arakawa
- Dept. Systems Physiology, Graduate School of Medicine, University of the Ryukyus, Japan.
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22
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Oubraim S, Shen RY, Haj-Dahmane S. Oxytocin excites dorsal raphe serotonin neurons and bidirectionally gates their glutamate synapses. iScience 2023; 26:106707. [PMID: 37250336 PMCID: PMC10214716 DOI: 10.1016/j.isci.2023.106707] [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: 02/20/2023] [Revised: 03/20/2023] [Accepted: 04/18/2023] [Indexed: 05/31/2023] Open
Abstract
Oxytocin (OXT) modulates wide spectrum of social and emotional behaviors via modulation of numerous neurotransmitter systems, including serotonin (5-HT). However, how OXT controls the function of dorsal raphe nucleus (DRN) 5-HT neurons remains unknown. Here, we reveal that OXT excites and alters the firing pattern of 5-HT neurons via activation of postsynaptic OXT receptors (OXTRs). In addition, OXT induces cell-type-specific depression and potentiation of DRN glutamate synapses by two retrograde lipid messengers, 2-arachidonoylglycerol (2-AG) and arachidonic acid (AA), respectively. Neuronal mapping demonstrates that OXT preferentially potentiates glutamate synapses of 5-HT neurons projecting to medial prefrontal cortex (mPFC) and depresses glutamatergic inputs to 5-HT neurons projecting to lateral habenula (LHb) and central amygdala (CeA). Thus, by engaging distinct retrograde lipid messengers, OXT exerts a target-specific gating of glutamate synapses on the DRN. As such, our data uncovers the neuronal mechanisms by which OXT modulates the function of DRN 5-HT neurons.
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Affiliation(s)
- Saida Oubraim
- Department of Pharmacology and Toxicology, University at Buffalo, Jacobs School of Medicine and Biomedical Sciences, State University of New York, 1021 Main Street, Buffalo, NY 14203, USA
| | - Roh-Yu Shen
- Department of Pharmacology and Toxicology, University at Buffalo, Jacobs School of Medicine and Biomedical Sciences, State University of New York, 1021 Main Street, Buffalo, NY 14203, USA
- University at Buffalo Neuroscience Program, University at Buffalo, Jacobs School of Medicine and Biomedical Sciences, State University of New York, 1021 Main Street, Buffalo, NY 14203, USA
| | - Samir Haj-Dahmane
- Department of Pharmacology and Toxicology, University at Buffalo, Jacobs School of Medicine and Biomedical Sciences, State University of New York, 1021 Main Street, Buffalo, NY 14203, USA
- University at Buffalo Neuroscience Program, University at Buffalo, Jacobs School of Medicine and Biomedical Sciences, State University of New York, 1021 Main Street, Buffalo, NY 14203, USA
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23
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Fortin-Houde J, Henderson F, Dumas S, Ducharme G, Amilhon B. Parallel streams of raphe VGLUT3-positive inputs target the dorsal and ventral hippocampus in each hemisphere. J Comp Neurol 2023; 531:702-719. [PMID: 36855269 DOI: 10.1002/cne.25452] [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: 08/29/2022] [Revised: 11/23/2022] [Accepted: 12/13/2022] [Indexed: 03/02/2023]
Abstract
The hippocampus (HP) receives neurochemically diverse inputs from the raphe nuclei, including glutamatergic axons characterized by the expression of the vesicular glutamate transporter type 3 (VGLUT3). These raphe-HP VGLUT3 projections have been suggested to play a critical role in HP functions, yet a complete anatomical overview of raphe VGLUT3 projections to the forebrain, and in particular to the HP, is lacking. Using anterograde viral tracing, we describe largely nonoverlapping VGLUT3-positive projections from the dorsal raphe (DR) and median raphe (MnR) to the forebrain, with the HP receiving inputs from the MnR. A limited subset of forebrain regions such as the amygdaloid complex, claustrum, and hypothalamus receives projections from both the DR and MnR that remain largely segregated. This highly complementary anatomical pattern suggests contrasting roles for DR and MnR VGLUT3 neurons. To further analyze the topography of VGLUT3 raphe projections to the HP, we used retrograde tracing and found that HP-projecting VGLUT3-positive neurons (VGLUT3HP ) distribute over several raphe subregions (including the MnR, paramedian raphe, and B9 cell group) and lack co-expression of serotonergic markers. Strikingly, double retrograde tracing experiments unraveled two parallel streams of VGLUT3-positive projections targeting the dorsal and ventral poles of the HP. These results demonstrate highly organized and segregated VGLUT3-positive projections to the HP, suggesting independent modulation of HP functions such as spatial memory and emotion-related behavior.
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Affiliation(s)
- Justine Fortin-Houde
- Département de Neuroscience, Université de Montréal, Montréal, Québec, Canada
- CHU Sainte-Justine Research Center, Montréal, Québec, Canada
| | - Fiona Henderson
- Département de Neuroscience, Université de Montréal, Montréal, Québec, Canada
- CHU Sainte-Justine Research Center, Montréal, Québec, Canada
| | | | | | - Bénédicte Amilhon
- Département de Neuroscience, Université de Montréal, Montréal, Québec, Canada
- CHU Sainte-Justine Research Center, Montréal, Québec, Canada
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24
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Morgan AA, Alves ND, Stevens GS, Yeasmin TT, Mackay A, Power S, Sargin D, Hanna C, Adib AL, Ziolkowski-Blake A, Lambe EK, Ansorge MS. Medial Prefrontal Cortex Serotonin Input Regulates Cognitive Flexibility in Mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.30.534775. [PMID: 37034804 PMCID: PMC10081203 DOI: 10.1101/2023.03.30.534775] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
The medial prefrontal cortex (mPFC) regulates cognitive flexibility and emotional behavior. Neurons that release serotonin project to the mPFC, and serotonergic drugs influence emotion and cognition. Yet, the specific roles of endogenous serotonin release in the mPFC on neurophysiology and behavior are unknown. We show that axonal serotonin release in the mPFC directly inhibits the major mPFC output neurons. In serotonergic neurons projecting from the dorsal raphe to the mPFC, we find endogenous activity signatures pre-reward retrieval and at reward retrieval during a cognitive flexibility task. In vivo optogenetic activation of this pathway during pre-reward retrieval selectively improved extradimensional rule shift performance while inhibition impaired it, demonstrating sufficiency and necessity for mPFC serotonin release in cognitive flexibility. Locomotor activity and anxiety-like behavior were not affected by either optogenetic manipulation. Collectively, our data reveal a powerful and specific modulatory role of endogenous serotonin release from dorsal raphe-to-mPFC projecting neurons in cognitive flexibility.
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25
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Dorsal raphe serotonergic neurons preferentially reactivate dorsal dentate gyrus cell ensembles associated with positive experience. Cell Rep 2023; 42:112149. [PMID: 36821440 DOI: 10.1016/j.celrep.2023.112149] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 11/24/2022] [Accepted: 02/06/2023] [Indexed: 02/24/2023] Open
Abstract
Major depressive disorder (MDD) is among the most common mental illnesses. Serotonergic (5-HT) neurons are central to the pathophysiology and treatment of MDD. Repeatedly recalling positive episodes is effective for MDD. Stimulating 5-HT neurons of the dorsal raphe nucleus (DRN) or neuronal ensembles in the dorsal dentate gyrus (dDG) associated with positive memories reverses the stress-induced behavioral abnormalities. Despite this phenotypic similarity, their causal relationship is unclear. This study revealed that the DRN 5-HT neurons activate dDG neurons; surprisingly, this activation was specifically observed in positive memory ensembles rather than neutral or negative ensembles. Furthermore, we revealed that dopaminergic signaling induced by activation of DRN 5-HT neurons projecting to the ventral tegmental area mediates an increase in active coping behavior and positive dDG ensemble reactivation. Our study identifies a role of DRN 5-HT neurons as specific reactivators of positive memories and provides insights into how serotonin elicits antidepressive effects.
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26
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Argañaraz CV, Adjimann TS, Perissinotti PP, Soiza-Reilly M. Selective refinement of glutamate and GABA synapses on dorsal raphe 5-HT neurons during postnatal life. Development 2022; 149:285818. [PMID: 36458556 DOI: 10.1242/dev.201121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 11/18/2022] [Indexed: 12/05/2022]
Abstract
Serotonin (5-hydroxytryptamine, 5-HT) neurons are implicated in the etiology and therapeutics of anxiety and depression. Critical periods of vulnerability during brain development enable maladaptive mechanisms to produce detrimental consequences on adult mood and emotional responses. 5-HT plays a crucial role in these mechanisms; however, little is known about how synaptic inputs and modulatory systems that shape the activity of early 5-HT networks mature during postnatal development. We investigated in mice the postnatal trajectory of glutamate and GABA synaptic inputs to dorsal raphe nucleus (DRN) 5-HT neurons, the main source of forebrain 5-HT. High-resolution quantitative analyses with array tomography and ex vivo electrophysiology indicate that cortical glutamate and subcortical GABA synapses undergo a profound refinement process after the third postnatal week, whereas subcortical glutamate inputs do not. This refinement of DRN inputs is not accompanied by changes in 5-HT1A receptor-mediated inhibition over 5-HT neurons. Our study reveals a precise developmental pattern of synaptic refinement of DRN excitatory and inhibitory afferents, when 5-HT-related inhibitory mechanisms are in place. These findings contribute to the understanding of neurodevelopmental vulnerability to psychiatric disorders. This article has an associated 'The people behind the papers' interview.
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Affiliation(s)
- Carla V Argañaraz
- Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos AiresC1428EGA, Argentina
| | - Tamara S Adjimann
- Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos AiresC1428EGA, Argentina
| | - Paula P Perissinotti
- Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos AiresC1428EGA, Argentina
| | - Mariano Soiza-Reilly
- Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos AiresC1428EGA, Argentina
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27
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Chowdhury A, Luchetti A, Fernandes G, Filho DA, Kastellakis G, Tzilivaki A, Ramirez EM, Tran MY, Poirazi P, Silva AJ. A locus coeruleus-dorsal CA1 dopaminergic circuit modulates memory linking. Neuron 2022; 110:3374-3388.e8. [PMID: 36041433 PMCID: PMC10508214 DOI: 10.1016/j.neuron.2022.08.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/07/2022] [Accepted: 07/31/2022] [Indexed: 11/20/2022]
Abstract
Individual memories are often linked so that the recall of one triggers the recall of another. For example, contextual memories acquired close in time can be linked, and this is known to depend on a temporary increase in excitability that drives the overlap between dorsal CA1 (dCA1) hippocampal ensembles that encode the linked memories. Here, we show that locus coeruleus (LC) cells projecting to dCA1 have a key permissive role in contextual memory linking, without affecting contextual memory formation, and that this effect is mediated by dopamine. Additionally, we found that LC-to-dCA1-projecting neurons modulate the excitability of dCA1 neurons and the extent of overlap between dCA1 memory ensembles as well as the stability of coactivity patterns within these ensembles. This discovery of a neuromodulatory system that specifically affects memory linking without affecting memory formation reveals a fundamental separation between the brain mechanisms modulating these two distinct processes.
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Affiliation(s)
- Ananya Chowdhury
- Departments of Neurobiology, Psychiatry & Biobehavioral Sciences, and Psychology, Integrative Center for Learning and Memory, and Brain Research Institute, UCLA, Los Angeles, CA 90095
| | - Alessandro Luchetti
- Departments of Neurobiology, Psychiatry & Biobehavioral Sciences, and Psychology, Integrative Center for Learning and Memory, and Brain Research Institute, UCLA, Los Angeles, CA 90095
| | - Giselle Fernandes
- Departments of Neurobiology, Psychiatry & Biobehavioral Sciences, and Psychology, Integrative Center for Learning and Memory, and Brain Research Institute, UCLA, Los Angeles, CA 90095
| | - Daniel Almeida Filho
- Departments of Neurobiology, Psychiatry & Biobehavioral Sciences, and Psychology, Integrative Center for Learning and Memory, and Brain Research Institute, UCLA, Los Angeles, CA 90095
| | - George Kastellakis
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, Hellas (FORTH), Vassilica Vouton, PO Box 1527, GR 711 10 Heraklion, Crete, Greece
| | - Alexandra Tzilivaki
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, Hellas (FORTH), Vassilica Vouton, PO Box 1527, GR 711 10 Heraklion, Crete, Greece
- Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health Charitéplatz 1, 10117 Berlin Germany
- Einstein Center for Neurosciences Berlin Charitéplatz 1, 10117 Berlin Germany
- Neurocure Cluster of Excellence Charitéplatz 1, 10117 Berlin, Germany
| | - Erica M Ramirez
- Departments of Neurobiology, Psychiatry & Biobehavioral Sciences, and Psychology, Integrative Center for Learning and Memory, and Brain Research Institute, UCLA, Los Angeles, CA 90095
| | - Mary Y Tran
- Departments of Neurobiology, Psychiatry & Biobehavioral Sciences, and Psychology, Integrative Center for Learning and Memory, and Brain Research Institute, UCLA, Los Angeles, CA 90095
| | - Panayiota Poirazi
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, Hellas (FORTH), Vassilica Vouton, PO Box 1527, GR 711 10 Heraklion, Crete, Greece
| | - Alcino J Silva
- Departments of Neurobiology, Psychiatry & Biobehavioral Sciences, and Psychology, Integrative Center for Learning and Memory, and Brain Research Institute, UCLA, Los Angeles, CA 90095
- Lead contact
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28
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Oubraim S, Wang R, Hausknecht K, Kaczocha M, Shen RY, Haj-Dahmane S. Prenatal ethanol exposure causes anxiety-like phenotype and alters synaptic nitric oxide and endocannabinoid signaling in dorsal raphe nucleus of adult male rats. Transl Psychiatry 2022; 12:440. [PMID: 36216807 PMCID: PMC9550821 DOI: 10.1038/s41398-022-02210-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 09/21/2022] [Accepted: 09/27/2022] [Indexed: 11/08/2022] Open
Abstract
Mood disorders, including anxiety and depression caused by prenatal ethanol exposure (PE) are prevalent conditions in fetal alcohol spectrum disorders (FASDs). Prenatal ethanol exposure is associated with persistent dysfunctions of several neurotransmitter systems, including the serotonin (5-HT) system, which plays a major role in mood regulation and stress homeostasis. While PE is known to disrupt the development of the 5-HT system, the cellular mechanisms by which it alters the function of dorsal raphe nucleus (DRn) 5-HT neurons and their synaptic inputs remain unknown. Here, we used a second-trimester binge-drinking pattern PE (two daily gavages of 15% w/v ethanol at 3 g/kg, 5-6 h apart) during gestational days 8 - 20 and measured anxiety-like behaviors of adult male rats using the elevated plus (EPM) and zero (ZM) mazes. We also employed ex-vivo electrophysiological and pharmacological approaches to unravel the mechanisms by which PE alters the excitability and synaptic transmission onto DRn 5-HT neurons. We found that PE enhanced anxiety-like behaviors in adult male rats and induced a persistent activation of DRn 5-HT neurons. The PE-induced activation of DRn 5-HT neurons was largely mediated by potentiation of DRn glutamate synapses, which was caused by activation of the nitrergic system and impaired endocannabinoid signaling. As such, the present study reveals "push-pull" effects of PE on nitrergic and eCB signaling, respectively, which mediate the enhanced activity of DRn 5-HT neurons and could contribute to anxiety-like behaviors observed in animal model of FASD.
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Affiliation(s)
- Saida Oubraim
- Department of Pharmacology and Toxicology, State University of New York, 1021 Main Street, Buffalo, NY, 14203, USA
| | - Ruixiang Wang
- Department of Pharmacology and Toxicology, State University of New York, 1021 Main Street, Buffalo, NY, 14203, USA
| | - Kathryn Hausknecht
- Department of Pharmacology and Toxicology, State University of New York, 1021 Main Street, Buffalo, NY, 14203, USA
| | - Martin Kaczocha
- Department of Anesthesiology, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Roh-Yu Shen
- Department of Pharmacology and Toxicology, State University of New York, 1021 Main Street, Buffalo, NY, 14203, USA
- University at Buffalo Neuroscience Program, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, State University of New York, 1021 Main Street, Buffalo, NY, 14203, USA
| | - Samir Haj-Dahmane
- Department of Pharmacology and Toxicology, State University of New York, 1021 Main Street, Buffalo, NY, 14203, USA.
- University at Buffalo Neuroscience Program, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, State University of New York, 1021 Main Street, Buffalo, NY, 14203, USA.
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29
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Paquelet GE, Carrion K, Lacefield CO, Zhou P, Hen R, Miller BR. Single-cell activity and network properties of dorsal raphe nucleus serotonin neurons during emotionally salient behaviors. Neuron 2022; 110:2664-2679.e8. [PMID: 35700737 PMCID: PMC9575686 DOI: 10.1016/j.neuron.2022.05.015] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 11/23/2021] [Accepted: 05/13/2022] [Indexed: 12/20/2022]
Abstract
The serotonin system modulates a wide variety of emotional behaviors and states, including reward processing, anxiety, and social interaction. To reveal the underlying patterns of neural activity, we visualized serotonergic neurons in the dorsal raphe nucleus (DRN5-HT) of mice using miniaturized microscopy during diverse emotional behaviors. We discovered ensembles of cells with highly correlated activity and found that DRN5-HT neurons are preferentially recruited by emotionally salient stimuli as opposed to neutral stimuli. Individual DRN5-HT neurons responded to diverse combinations of salient stimuli, with some preference for valence and sensory modality. Anatomically defined subpopulations projecting to either a reward-related structure (the ventral tegmental area) or an anxiety-related structure (the bed nucleus of the stria terminalis) contained all response types but were enriched in reward- and anxiety-responsive cells, respectively. Our results suggest that the DRN serotonin system responds to emotional salience using ensembles with mixed selectivity and biases in downstream connectivity.
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Affiliation(s)
- Grace E Paquelet
- Department of Neuroscience, Columbia University, New York, NY 10032, USA
| | - Kassandra Carrion
- Division of Systems Neuroscience, New York State Psychiatric Institute, New York, NY 10032, USA
| | - Clay O Lacefield
- Division of Systems Neuroscience, New York State Psychiatric Institute, New York, NY 10032, USA; Department of Psychiatry, Columbia University Medical Center, New York, NY 10032, USA
| | - Pengcheng Zhou
- Department of Neuroscience, Columbia University, New York, NY 10032, USA; Department of Statistics, Columbia University, New York, NY 10027, USA; Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY 10027
| | - René Hen
- Department of Neuroscience, Columbia University, New York, NY 10032, USA; Division of Systems Neuroscience, New York State Psychiatric Institute, New York, NY 10032, USA; Department of Psychiatry, Columbia University Medical Center, New York, NY 10032, USA
| | - Bradley R Miller
- Division of Systems Neuroscience, New York State Psychiatric Institute, New York, NY 10032, USA; Department of Psychiatry, Columbia University Medical Center, New York, NY 10032, USA.
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30
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Lin S, Huang L, Luo ZC, Li X, Jin SY, Du ZJ, Wu DY, Xiong WC, Huang L, Luo ZY, Song YL, Wang Q, Liu XW, Ma RJ, Wang ML, Ren CR, Yang JM, Gao TM. The ATP Level in the Medial Prefrontal Cortex Regulates Depressive-like Behavior via the Medial Prefrontal Cortex-Lateral Habenula Pathway. Biol Psychiatry 2022; 92:179-192. [PMID: 35489874 DOI: 10.1016/j.biopsych.2022.02.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 01/27/2022] [Accepted: 02/15/2022] [Indexed: 12/27/2022]
Abstract
BACKGROUND Depression is the most common mental illness. Mounting evidence suggests that dysregulation of extracellular ATP (adenosine triphosphate) is involved in the pathophysiology of depression. However, the cellular and neural circuit mechanisms through which ATP modulates depressive-like behavior remain elusive. METHODS By use of ex vivo slice electrophysiology, chemogenetic manipulations, RNA interference, gene knockout, behavioral testing, and two depression mouse models, one induced by chronic social defeat stress and one caused by a IP3R2-null mutation, we systematically investigated the cellular and neural circuit mechanisms underlying ATP deficiency-induced depressive-like behavior. RESULTS Deficiency of extracellular ATP in both defeated susceptible mice and IP3R2-null mutation mice led to reduced GABAergic (gamma-aminobutyric acidergic) inhibition and elevated excitability in lateral habenula-projecting, but not dorsal raphe-projecting, medial prefrontal cortex (mPFC) neurons. Furthermore, the P2X2 receptor in GABAergic interneurons mediated ATP modulation of lateral habenula-projecting mPFC neurons and depressive-like behavior. Remarkably, chemogenetic activation of the mPFC-lateral habenula pathway induced depressive-like behavior in C57BL/6J mice, while inhibition of this pathway was sufficient to alleviate the behavioral impairment in both defeated susceptible and IP3R2-null mutant mice. CONCLUSIONS Overall, our study provides compelling evidence that ATP level in the mPFC is critically involved in regulating depressive-like behavior in a pathway-specific manner. These results shed new light on the mechanisms underlying depression and the antidepressant effect of ATP.
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Affiliation(s)
- Song Lin
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China; Physiology Department and Guangdong-Hongkong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, China
| | - Lang Huang
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Zhou-Cai Luo
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Xin Li
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Shi-Yang Jin
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Zhuo-Jun Du
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Ding-Yu Wu
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Wen-Chao Xiong
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Lu Huang
- Physiology Department and Guangdong-Hongkong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, China
| | - Zheng-Yi Luo
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Yun-Long Song
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Qian Wang
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Xian-Wei Liu
- Physiology Department and Guangdong-Hongkong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, China
| | - Rui-Jia Ma
- Physiology Department and Guangdong-Hongkong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, China
| | - Meng-Ling Wang
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Chao-Ran Ren
- Physiology Department and Guangdong-Hongkong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, China
| | - Jian-Ming Yang
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Tian-Ming Gao
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China.
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31
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Shine JM, O’Callaghan C, Walpola IC, Wainstein G, Taylor N, Aru J, Huebner B, John YJ. Understanding the effects of serotonin in the brain through its role in the gastrointestinal tract. Brain 2022; 145:2967-2981. [DOI: 10.1093/brain/awac256] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 06/12/2022] [Accepted: 06/14/2022] [Indexed: 11/12/2022] Open
Abstract
Abstract
The neuromodulatory arousal system imbues the nervous system with the flexibility and robustness required to facilitate adaptive behaviour. While there are well-understood mechanisms linking dopamine, noradrenaline and acetylcholine to distinct behavioural states, similar conclusions have not been as readily available for serotonin. Fascinatingly, despite clear links between serotonergic function and cognitive capacities as diverse as reward processing, exploration, and the psychedelic experience, over 95% of the serotonin in the body is released in the gastrointestinal tract, where it controls digestive muscle contractions (peristalsis). Here, we argue that framing neural serotonin as a rostral extension of the gastrointestinal serotonergic system dissolves much of the mystery associated with the central serotonergic system. Specifically, we outline that central serotonin activity mimics the effects of a digestion/satiety circuit mediated by hypothalamic control over descending serotonergic nuclei in the brainstem. We review commonalities and differences between these two circuits, with a focus on the heterogeneous expression of different classes of serotonin receptors in the brain. Much in the way that serotonin-induced peristalsis facilitates the work of digestion, serotonergic influences over cognition can be reframed as performing the work of cognition. Extending this analogy, we argue that the central serotonergic system allows the brain to arbitrate between different cognitive modes as a function of serotonergic tone: low activity facilitates cognitive automaticity, whereas higher activity helps to identify flexible solutions to problems, particularly if and when the initial responses fail. This perspective sheds light on otherwise disparate capacities mediated by serotonin, and also helps to understand why there are such pervasive links between serotonergic pathology and the symptoms of psychiatric disorders.
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Affiliation(s)
| | | | - Ishan C Walpola
- Prince of Wales Hospital , Randwick, New South Wales , Australia
| | | | | | - Jaan Aru
- University of Tartu , Tartu , Estonia
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32
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Souza R, Bueno D, Lima LB, Muchon MJ, Gonçalves L, Donato J, Shammah-Lagnado SJ, Metzger M. Top-down projections of the prefrontal cortex to the ventral tegmental area, laterodorsal tegmental nucleus, and median raphe nucleus. Brain Struct Funct 2022; 227:2465-2487. [DOI: 10.1007/s00429-022-02538-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 07/05/2022] [Indexed: 11/30/2022]
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33
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Rahaman SM, Chowdhury S, Mukai Y, Ono D, Yamaguchi H, Yamanaka A. Functional Interaction Between GABAergic Neurons in the Ventral Tegmental Area and Serotonergic Neurons in the Dorsal Raphe Nucleus. Front Neurosci 2022; 16:877054. [PMID: 35663550 PMCID: PMC9160575 DOI: 10.3389/fnins.2022.877054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 04/21/2022] [Indexed: 12/02/2022] Open
Abstract
GABAergic neurons in the ventral tegmental area (VTA) have brain-wide projections and are involved in multiple behavioral and physiological functions. Here, we revealed the responsiveness of Gad67+ neurons in VTA (VTAGad67+) to various neurotransmitters involved in the regulation of sleep/wakefulness by slice patch clamp recording. Among the substances tested, a cholinergic agonist activated, but serotonin, dopamine and histamine inhibited these neurons. Dense VTAGad67+ neuronal projections were observed in brain areas regulating sleep/wakefulness, including the central amygdala (CeA), dorsal raphe nucleus (DRN), and locus coeruleus (LC). Using a combination of electrophysiology and optogenetic studies, we showed that VTAGad67+ neurons inhibited all neurons recorded in the DRN, but did not inhibit randomly recorded neurons in the CeA and LC. Further examination revealed that the serotonergic neurons in the DRN (DRN5–HT) were monosynaptically innervated and inhibited by VTAGad67+ neurons. All recorded DRN5–HT neurons received inhibitory input from VTAGad67+ neurons, while only one quarter of them received inhibitory input from local GABAergic neurons. Gad67+ neurons in the DRN (DRNGad67+) also received monosynaptic inhibitory input from VTAGad67+ neurons. Taken together, we found that VTAGad67+ neurons were integrated in many inputs, and their output inhibits DRN5–HT neurons, which may regulate physiological functions including sleep/wakefulness.
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Affiliation(s)
- Sheikh Mizanur Rahaman
- Department of Neuroscience II, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
- Department of Neural Regulation, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Srikanta Chowdhury
- Department of Neuroscience II, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
- Department of Neural Regulation, Nagoya University Graduate School of Medicine, Nagoya, Japan
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, United States
| | - Yasutaka Mukai
- Department of Neuroscience II, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
- Department of Neural Regulation, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Daisuke Ono
- Department of Neuroscience II, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
- Department of Neural Regulation, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroshi Yamaguchi
- Department of Neuroscience II, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
- Department of Neural Regulation, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Akihiro Yamanaka
- Department of Neuroscience II, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
- Department of Neural Regulation, Nagoya University Graduate School of Medicine, Nagoya, Japan
- *Correspondence: Akihiro Yamanaka,
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34
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Stress decreases serotonin tone in the nucleus accumbens in male mice to promote aversion and potentiate cocaine preference via decreased stimulation of 5-HT 1B receptors. Neuropsychopharmacology 2022; 47:891-901. [PMID: 34564712 PMCID: PMC8882182 DOI: 10.1038/s41386-021-01178-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 08/25/2021] [Accepted: 09/01/2021] [Indexed: 02/08/2023]
Abstract
Stress-induced release of dynorphins (Dyn) activates kappa opioid receptors (KOR) in serotonergic neurons to produce dysphoria and potentiate drug reward; however, the circuit mechanisms responsible for this effect are not known. In male mice, we found that conditional deletion of KOR from Slc6a4 (SERT)-expressing neurons blocked stress-induced potentiation of cocaine conditioned place preference (CPP). Within the dorsal raphe nucleus (DRN), two overlapping populations of KOR-expressing neurons: Slc17a8 (VGluT3) and SERT, were distinguished functionally and anatomically. Optogenetic inhibition of these SERT+ neurons potentiated subsequent cocaine CPP, whereas optical inhibition of the VGluT3+ neurons blocked subsequent cocaine CPP. SERT+/VGluT3- expressing neurons were concentrated in the lateral aspect of the DRN. SERT projections from the DRN were observed in the medial nucleus accumbens (mNAc), but VGluT3 projections were not. Optical inhibition of SERT+ neurons produced place aversion, whereas optical stimulation of SERT+ terminals in the mNAc attenuated stress-induced increases in forced swim immobility and subsequent cocaine CPP. KOR neurons projecting to mNAc were confined to the lateral aspect of the DRN, and the principal source of dynorphinergic (Pdyn) afferents in the mNAc was from local neurons. Excision of Pdyn from the mNAc blocked stress-potentiation of cocaine CPP. Prior studies suggested that stress-induced dynorphin release within the mNAc activates KOR to potentiate cocaine preference by a reduction in 5-HT tone. Consistent with this hypothesis, a transient pharmacological blockade of mNAc 5-HT1B receptors potentiated subsequent cocaine CPP. 5-HT1B is known to be expressed on 5-HT terminals in NAc, and 5-HT1B transcript was also detected in Pdyn+, Adora2a+ and ChAT+ (markers for direct pathway, indirect pathway, and cholinergic interneurons, respectively). Following stress exposure, 5-HT1B transcript was selectively elevated in Pdyn+ cells of the mNAc. These findings suggest that Dyn/KOR regulates serotonin activation of 5HT1B receptors within the mNAc and dynamically controls stress response, affect, and drug reward.
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35
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Grossman CD, Bari BA, Cohen JY. Serotonin neurons modulate learning rate through uncertainty. Curr Biol 2022; 32:586-599.e7. [PMID: 34936883 PMCID: PMC8825708 DOI: 10.1016/j.cub.2021.12.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 10/11/2021] [Accepted: 12/03/2021] [Indexed: 12/20/2022]
Abstract
Regulating how fast to learn is critical for flexible behavior. Learning about the consequences of actions should be slow in stable environments, but accelerate when that environment changes. Recognizing stability and detecting change are difficult in environments with noisy relationships between actions and outcomes. Under these conditions, theories propose that uncertainty can be used to modulate learning rates ("meta-learning"). We show that mice behaving in a dynamic foraging task exhibit choice behavior that varied as a function of two forms of uncertainty estimated from a meta-learning model. The activity of dorsal raphe serotonin neurons tracked both types of uncertainty in the foraging task as well as in a dynamic Pavlovian task. Reversible inhibition of serotonin neurons in the foraging task reproduced changes in learning predicted by a simulated lesion of meta-learning in the model. We thus provide a quantitative link between serotonin neuron activity, learning, and decision making.
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Affiliation(s)
- Cooper D Grossman
- The Solomon H. Snyder Department of Neuroscience, Brain Science Institute, Kavli Neuroscience Discovery Institute, The Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Baltimore, MD 21205, USA
| | - Bilal A Bari
- The Solomon H. Snyder Department of Neuroscience, Brain Science Institute, Kavli Neuroscience Discovery Institute, The Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Baltimore, MD 21205, USA
| | - Jeremiah Y Cohen
- The Solomon H. Snyder Department of Neuroscience, Brain Science Institute, Kavli Neuroscience Discovery Institute, The Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Baltimore, MD 21205, USA.
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36
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Zhang J, Wang X, Bernardi RE, Ju J, Wei S, Gong Z. Activation of AMPA Receptors in the Lateral Habenula Produces Anxiolytic Effects in a Rat Model of Parkinson’s Disease. Front Pharmacol 2022; 13:821975. [PMID: 35145415 PMCID: PMC8822149 DOI: 10.3389/fphar.2022.821975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 01/07/2022] [Indexed: 11/21/2022] Open
Abstract
Background: Parkinson’s disease (PD) is commonly accompanied with anxiety disorder, however, the mechanisms underlying PD-mediated anxiety remain elusive. The lateral habenula (LHb) is a critical brain region that influences the activity of the monoaminergic system in the midbrain and consequently modulates anxiety. Most neurons in the LHb express AMPA receptors (AMPARs). The PD model for the pharmacological intervention of AMPA receptors was established by the unilateral lesion of the substantia nigra pars compacta (SNc) with 6-hydroxydopamine (6-OHDA). Methods: The AMPAR agonist (S)-AMPA and antagonist NBQX were microinjected into the LHb, respectively, to examine whether anxiety-like behaviors were altered in sham-operated and SNc-lesion rats, measured with the paradigms of the open-field test (OPT) and elevated plus maze (EPM). Furthermore, dopamine (DA) and 5-hydroxytryptamine (5-HT) levels in the basolateral amygdala (BLA) were measured using in vivo microdialysis immediately following the injections of (S)-AMPA and NBQX into the LHb. Results: Activation of LHb AMPA receptors by (S)-AMPA produced anxiolytic-like behaviors and enhanced the extracellular DA and 5-HT in the BLA. Conversely, NBQX induced anxiety-like effects and suppressed the extracellular DA and 5-HT in the BLA. In addition, the minimal doses inducing the effects in the SNc-lesion rats were lower than those in sham-operated rats. Conclusion: These findings suggest that the effects of AMPA receptors in the LHb on anxiety-like behaviors likely involve the extracellular levels of DA and 5-HT in the BLA. The present results may improve our understanding of the neuropathology and/or treatment of PD.
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Affiliation(s)
- Jin Zhang
- State Key Laboratory of Chemical Oncogenomics, Guangdong Provincial Key Laboratory of Chemical Genomics, Shenzhen Graduate School, Peking University, Shenzhen, China
| | - Xiaobing Wang
- Department of Anatomy, College of Preclinical Medicine, Dali University, Dali, China
| | - Rick E. Bernardi
- Institute of Psychopharmacology, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg, Germany
| | - Jun Ju
- Brain Research Centre and Department of Biology, Southern University of Science and Technology, Shenzhen, China
| | - Shoupeng Wei
- Tomas Lindahl Nobel Laureate Laboratory, Precision Medicine Research Centre, Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
- *Correspondence: Shoupeng Wei, ; Zhiting Gong,
| | - Zhiting Gong
- Department of Anatomy, College of Preclinical Medicine, Dali University, Dali, China
- *Correspondence: Shoupeng Wei, ; Zhiting Gong,
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37
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Chaves T, Török B, Fazekas CL, Correia P, Sipos E, Várkonyi D, Hellinger Á, Erk D, Zelena D. Median raphe region GABAergic neurons contribute to social interest in mouse. Life Sci 2022; 289:120223. [PMID: 34896160 DOI: 10.1016/j.lfs.2021.120223] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 11/28/2021] [Accepted: 12/06/2021] [Indexed: 10/19/2022]
Abstract
Gamma-aminobutyric acid (GABA) is a well-known inhibitory neurotransmitter implicated in numerous physiological and pathological behaviors including social interest. Dysregulation of the median raphe region (MRR), a main serotoninergic nucleus, is also characterized by increased social problems. As the majority of MRR cells are GABAergic, we aimed to reveal the social role of these cells. Chemogenetic techniques were used in vesicular GABA transporter Cre mice and with the help of adeno-associated virus vectors artificial receptors (DREADDs, stimulatory, inhibitory or control, containing only a fluorophore) were expressed in MRR GABAergic cells confirmed by immunohistochemistry. Four weeks after viral injection a behavioral test battery (sociability; social interaction; resident-intruder) was conducted. The artificial ligand (clozapine-N-oxide, 1 mg/10 ml/kg) was administrated 30 min before the tests. As possible confounding factors, locomotion (open field/OF), anxiety-like behavior (elevated plus maze/EPM), and short-term memory (Y-maze) were also evaluated. Stimulation of the GABAergic cells in MRR had no effect on locomotion or working and social memory; however, it increased social interest during sociability and social interaction but not in resident-intruder tests. Accordingly, c-Fos elevation in MRR-GABAergic cells was detected after sociability, but not resident-intruder tests. In the EPM test, the inhibitory group entered into the open arms later, suggesting an anxiogenic-like tendency. We confirmed the role of MRR-GABAergic cells in promoting social interest. However, different subpopulations (e.g. long vs short projecting, various neuropeptide containing) might have divergent roles, which might remain hidden and requires further studies.
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Affiliation(s)
- Tiago Chaves
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, Budapest, Hungary; János Szentágothai School of Neurosciences, Semmelweis University, Budapest, Hungary
| | - Bibiána Török
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, Budapest, Hungary; János Szentágothai School of Neurosciences, Semmelweis University, Budapest, Hungary
| | - Csilla Lea Fazekas
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, Budapest, Hungary; János Szentágothai School of Neurosciences, Semmelweis University, Budapest, Hungary
| | - Pedro Correia
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, Budapest, Hungary; János Szentágothai School of Neurosciences, Semmelweis University, Budapest, Hungary
| | - Eszter Sipos
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, Budapest, Hungary
| | - Dorottya Várkonyi
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, Budapest, Hungary
| | - Ákos Hellinger
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, Budapest, Hungary
| | - Dogu Erk
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, Budapest, Hungary
| | - Dóra Zelena
- Laboratory of Behavioral and Stress Studies, Institute of Experimental Medicine, Budapest, Hungary; Centre for Neuroscience, Szentágothai Research Centre, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary.
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Neural serotonergic circuits for controlling long-term voluntary alcohol consumption in mice. Mol Psychiatry 2022; 27:4599-4610. [PMID: 36195637 PMCID: PMC9531213 DOI: 10.1038/s41380-022-01789-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 09/05/2022] [Accepted: 09/09/2022] [Indexed: 12/14/2022]
Abstract
Alcohol-use-disorders are chronic relapsing illnesses, often co-morbid with anxiety. We have previously shown using the "drinking-in-the-dark" model in mice that the stimulation of the serotonin receptor 1A (5-HT1A) reduces ethanol binge-drinking behaviour and withdrawal-induced anxiety. The 5-HT1A receptor is located either on Raphe neurons as autoreceptors, or on target neurons as heteroreceptors. By combining a pharmacological approach with biased agonists targeting the 5-HT1A auto- or heteroreceptor and a chemogenetic approach (DREADDs), here we identified that ethanol-binge drinking behaviour is dependent on 5-HT1A autoreceptors and 5-HT neuronal function, with a transition from DRN-dependent regulation of short-term (6 weeks) ethanol intake, to MRN-dependent regulation after longer ethanol exposure (12 weeks). We further identified a serotonergic microcircuit (5-HTMRN→DG) originating from the MRN and projecting to the dentate gyrus (DG) of the hippocampus, that is specifically affected by, and modulates long-term ethanol consumption. The present study indicates that targeting Raphe nuclei 5-HT1A autoreceptors with agonists might represent an innovative pharmacotherapeutic strategy to combat alcohol abuse.
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Mantas I, Saarinen M, Xu ZQD, Svenningsson P. Update on GPCR-based targets for the development of novel antidepressants. Mol Psychiatry 2022; 27:534-558. [PMID: 33589739 PMCID: PMC8960420 DOI: 10.1038/s41380-021-01040-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 01/22/2021] [Accepted: 01/25/2021] [Indexed: 01/31/2023]
Abstract
Traditional antidepressants largely interfere with monoaminergic transport or degradation systems, taking several weeks to have their therapeutic actions. Moreover, a large proportion of depressed patients are resistant to these therapies. Several atypical antidepressants have been developed which interact with G protein coupled receptors (GPCRs) instead, as direct targeting of receptors may achieve more efficacious and faster antidepressant actions. The focus of this review is to provide an update on how distinct GPCRs mediate antidepressant actions and discuss recent insights into how GPCRs regulate the pathophysiology of Major Depressive Disorder (MDD). We also discuss the therapeutic potential of novel GPCR targets, which are appealing due to their ligand selectivity, expression pattern, or pharmacological profiles. Finally, we highlight recent advances in understanding GPCR pharmacology and structure, and how they may provide new avenues for drug development.
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Affiliation(s)
- Ioannis Mantas
- grid.4714.60000 0004 1937 0626Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - Marcus Saarinen
- grid.4714.60000 0004 1937 0626Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - Zhi-Qing David Xu
- grid.24696.3f0000 0004 0369 153XDepartment of Neurobiology, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - Per Svenningsson
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden.
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40
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Lin S, Du Y, Xia Y, Xie Y, Xiao L, Wang G. Advances in optogenetic studies of depressive-like behaviors and underlying neural circuit mechanisms. Front Psychiatry 2022; 13:950910. [PMID: 36159933 PMCID: PMC9492959 DOI: 10.3389/fpsyt.2022.950910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 08/17/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUNDS The neural circuit mechanisms underlying depression remain unclear. Recently optogenetics has gradually gained recognition as a novel technique to regulate the activity of neurons with light stimulation. Scientists are now transferring their focus to the function of brain regions and neural circuits in the pathogenic progress of depression. Deciphering the circuitry mechanism of depressive-like behaviors may help us better understand the symptomatology of depression. However, few studies have summarized current progress on optogenetic researches into the neural circuit mechanisms of depressive-like behaviors. AIMS This review aimed to introduce fundamental characteristics and methodologies of optogenetics, as well as how this technique achieves specific neuronal control with spatial and temporal accuracy. We mainly summarized recent progress in neural circuit discoveries in depressive-like behaviors using optogenetics and exhibited the potential of optogenetics as a tool to investigate the mechanism and possible optimization underlying antidepressant treatment such as ketamine and deep brain stimulation. METHODS A systematic review of the literature published in English mainly from 2010 to the present in databases was performed. The selected literature is then categorized and summarized according to their neural circuits and depressive-like behaviors. CONCLUSIONS Many important discoveries have been made utilizing optogenetics. These findings support optogenetics as a powerful and potential tool for studying depression. And our comprehension to the etiology of depression and other psychiatric disorders will also be more thorough with this rapidly developing technique in the near future.
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Affiliation(s)
- Shanshan Lin
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan, China.,Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yiwei Du
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan, China.,Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yujie Xia
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan, China.,Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yumeng Xie
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan, China.,Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Wuhan, China
| | - Ling Xiao
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan, China.,Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Wuhan, China
| | - Gaohua Wang
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan, China.,Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Wuhan, China
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Chronic hM4Di-DREADD-Mediated Chemogenetic Inhibition of Forebrain Excitatory Neurons in Postnatal or Juvenile Life Does Not Alter Adult Mood-Related Behavior. eNeuro 2022; 9:ENEURO.0381-21.2021. [PMID: 35115382 PMCID: PMC8856708 DOI: 10.1523/eneuro.0381-21.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 12/21/2021] [Accepted: 12/25/2021] [Indexed: 11/21/2022] Open
Abstract
G-protein-coupled receptors (GPCRs) coupled to Gi signaling, in particular downstream of monoaminergic neurotransmission, are posited to play a key role during developmental epochs (postnatal and juvenile) in shaping the emergence of adult anxiodepressive behaviors and sensorimotor gating. To address the role of Gi signaling in these developmental windows, we used a CaMKIIα-tTA::TRE hM4Di bigenic mouse line to express the hM4Di-DREADD (designer receptor exclusively activated by designer drugs) in forebrain excitatory neurons and enhanced Gi signaling via chronic administration of the DREADD agonist, clozapine-N-oxide (CNO) in the postnatal window (postnatal days 2–14) or the juvenile window (postnatal days 28–40). We confirmed that the expression of the HA-tagged hM4Di-DREADD was restricted to CaMKIIα-positive neurons in the forebrain, and that the administration of CNO in postnatal or juvenile windows evoked inhibition in forebrain circuits of the hippocampus and cortex, as indicated by a decline in expression of the neuronal activity marker c-Fos. hM4Di-DREADD-mediated inhibition of CaMKIIα-positive forebrain excitatory neurons in postnatal or juvenile life did not impact the weight profile of mouse pups, and also did not influence the normal ontogeny of sensory reflexes. Further, postnatal or juvenile hM4Di-DREADD-mediated inhibition of CaMKIIα-positive forebrain excitatory neurons did not alter anxiety- or despair-like behaviors in adulthood and did not impact sensorimotor gating. Collectively, these results indicate that chemogenetic induction of Gi signaling in CaMKIIα-positive forebrain excitatory neurons in postnatal and juvenile temporal windows does not appear to impinge on the programming of anxiodepressive behaviors in adulthood.
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Fazekas CL, Bellardie M, Török B, Sipos E, Tóth B, Baranyi M, Sperlágh B, Dobos-Kovács M, Chaillou E, Zelena D. Pharmacogenetic excitation of the median raphe region affects social and depressive-like behavior and core body temperature in male mice. Life Sci 2021; 286:120037. [PMID: 34637795 DOI: 10.1016/j.lfs.2021.120037] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 09/27/2021] [Accepted: 10/05/2021] [Indexed: 11/29/2022]
Abstract
AIMS Median raphe region (MRR) is an important bottom-up regulatory center for various behaviors as well as vegetative functions, but detailed descriptions and links between the two are still largely unexplored. METHODS Pharmacogenetics was used to study the role of MRR in social (sociability, social interaction, resident intruder test) and emotional behavior (forced swim test) parallel with some vegetative changes (biotelemetry: core body temperature). Additionally, to validate pharmacogenetics, the effect of clozapine-N-oxide (CNO), the ligand of the artificial receptor, was studied by measuring (i) serum and brainstem concentrations of CNO and clozapine; (ii) MRR stimulation induced neurotransmitter release in hippocampus; (iii) CNO induced changes in body temperature and locomotor activity. KEY FINDINGS MRR stimulation decreased locomotion, increased friendly social behavior in the resident intruder test and enhanced depressive-like behavior. The latter was accompanied by diminished decrease in core body temperature. Thirty minutes after CNO injection clozapine was predominant in the brainstem. Nonetheless, peripheral CNO injection was able to induce glutamate release in the hippocampus. CNO had no immediate (<30 min) or chronic (repeated injections) effect on the body temperature or locomotion. SIGNIFICANCE We confirmed the role of MRR in locomotion, social and depressive-like behavior. Most interestingly, only depressive-like behavior was accompanied by changed body temperature regulation, which was also observed in human depressive disorders previously. This indicates clinical relevance of our findings. Despite low penetration, CNO acts centrally, but does not influence the examined basic parameters, being suitable for repeated behavioral testing.
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Affiliation(s)
- Csilla Lea Fazekas
- Institute of Experimental Medicine, Budapest, Hungary; János Szentágothai Doctoral School of Neurosciences, Semmelweis University, Budapest, Hungary.
| | - Manon Bellardie
- Institute of Experimental Medicine, Budapest, Hungary; INRAE Centre Val de Loire, CNRS, IFCE, Université de Tours, UMR 85 Physiologie de la Reproduction et des Comportements, France
| | - Bibiána Török
- Institute of Experimental Medicine, Budapest, Hungary; János Szentágothai Doctoral School of Neurosciences, Semmelweis University, Budapest, Hungary
| | - Eszter Sipos
- Institute of Experimental Medicine, Budapest, Hungary
| | - Blanka Tóth
- Budapest University of Technology and Economics, Faculty of Chemical Technology and Biotechnology, Department of Inorganic and Analytical Chemistry, Budapest, Hungary
| | - Mária Baranyi
- Institute of Experimental Medicine, Budapest, Hungary
| | | | | | - Elodie Chaillou
- INRAE Centre Val de Loire, CNRS, IFCE, Université de Tours, UMR 85 Physiologie de la Reproduction et des Comportements, France
| | - Dóra Zelena
- Institute of Experimental Medicine, Budapest, Hungary; Centre for Neuroscience, Szentágothai Research Centre, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary
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Pekarskaya EA, Holt ES, Gingrich JA, Ansorge MS, Javitch JA, Canetta SE. Tianeptine, but not fluoxetine, decreases avoidant behavior in a mouse model of early developmental exposure to fluoxetine. Sci Rep 2021; 11:22852. [PMID: 34819526 PMCID: PMC8613176 DOI: 10.1038/s41598-021-02074-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 10/14/2021] [Indexed: 01/12/2023] Open
Abstract
Depression and anxiety, two of the most common mental health disorders, share common symptoms and treatments. Most pharmacological agents available to treat these disorders target monoamine systems. Currently, finding the most effective treatment for an individual is a process of trial and error. To better understand how disease etiology may predict treatment response, we studied mice exposed developmentally to the selective serotonin reuptake inhibitor (SSRI) fluoxetine (FLX). These mice show the murine equivalent of anxiety- and depression-like symptoms in adulthood and here we report that these mice are also behaviorally resistant to the antidepressant-like effects of adult SSRI administration. We investigated whether tianeptine (TIA), which exerts its therapeutic effects through agonism of the mu-opioid receptor instead of targeting monoaminergic systems, would be more effective in this model. We found that C57BL/6J pups exposed to FLX from postnatal day 2 to 11 (PNFLX, the mouse equivalent in terms of brain development to the human third trimester) showed increased avoidant behaviors as adults that failed to improve, or were even exacerbated, by chronic SSRI treatment. By contrast, avoidant behaviors in these same mice were drastically improved following chronic treatment with TIA. Overall, this demonstrates that TIA may be a promising alternative treatment for patients that fail to respond to typical antidepressants, especially in patients whose serotonergic system has been altered by in utero exposure to SSRIs.
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Affiliation(s)
- Elizabeth A Pekarskaya
- Department of Neuroscience, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
- Division of Molecular Therapeutics, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
| | - Emma S Holt
- Division of Molecular Therapeutics, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
- Division of Developmental Neuroscience, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
| | - Jay A Gingrich
- Division of Developmental Neuroscience, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
- Sackler Institute for Developmental Psychobiology, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
| | - Mark S Ansorge
- Division of Developmental Neuroscience, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
- Sackler Institute for Developmental Psychobiology, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA
| | - Jonathan A Javitch
- Division of Molecular Therapeutics, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA.
- Department of Molecular Pharmacology and Therapeutics, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA.
| | - Sarah E Canetta
- Division of Molecular Therapeutics, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA.
- Division of Developmental Neuroscience, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA.
- Sackler Institute for Developmental Psychobiology, Columbia University Vagelos College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY, USA.
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Xu Z, Feng Z, Zhao M, Sun Q, Deng L, Jia X, Jiang T, Luo P, Chen W, Tudi A, Yuan J, Li X, Gong H, Luo Q, Li A. Whole-brain connectivity atlas of glutamatergic and GABAergic neurons in the mouse dorsal and median raphe nuclei. eLife 2021; 10:65502. [PMID: 34792021 PMCID: PMC8626088 DOI: 10.7554/elife.65502] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 11/17/2021] [Indexed: 11/25/2022] Open
Abstract
The dorsal raphe nucleus (DR) and median raphe nucleus (MR) contain populations of glutamatergic and GABAergic neurons that regulate diverse behavioral functions. However, their whole-brain input-output circuits remain incompletely elucidated. We used viral tracing combined with fluorescence micro-optical sectioning tomography to generate a comprehensive whole-brain atlas of inputs and outputs of glutamatergic and GABAergic neurons in the DR and MR. We found that these neurons received inputs from similar upstream brain regions. The glutamatergic and GABAergic neurons in the same raphe nucleus had divergent projection patterns with differences in critical brain regions. Specifically, MR glutamatergic neurons projected to the lateral habenula through multiple pathways. Correlation and cluster analysis revealed that glutamatergic and GABAergic neurons in the same raphe nucleus received heterogeneous inputs and sent different collateral projections. This connectivity atlas further elucidates the anatomical architecture of the raphe nuclei, which could facilitate better understanding of their behavioral functions.
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Affiliation(s)
- Zhengchao Xu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Zhao Feng
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China.,HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China
| | - Mengting Zhao
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Qingtao Sun
- HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China
| | - Lei Deng
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Xueyan Jia
- HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China
| | - Tao Jiang
- HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China
| | - Pan Luo
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Wu Chen
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Ayizuohere Tudi
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Yuan
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China.,HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China
| | - Xiangning Li
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China.,HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China
| | - Hui Gong
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China.,HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China.,CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Science, Shanghai, China
| | - Qingming Luo
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China.,HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China.,School of Biomedical Engineering, Hainan University, Haikou, China
| | - Anan Li
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China.,HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China.,CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Science, Shanghai, China
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45
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Sekul AE, Ikuta T. The human raphe-hippocampal tract and affective sensitivity: a probabilistic tractography study. Brain Imaging Behav 2021; 16:1106-1112. [PMID: 34755292 DOI: 10.1007/s11682-021-00549-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/26/2021] [Indexed: 11/30/2022]
Abstract
Serotonergic system plays critical roles in modulating affective control. The raphe nucleus has been known to be the origin of forebrain 5-HT afferents. Specifically, the Raphe-Hippocampal projection has been shown to modulate affective sensitivity in rodents. However, the human Raphe-Hippocampal tract is not well studied. We aimed to segment the Raphe-Hippocampal tract using probabilistic tractography on diffusion tensor imaging data from 502 subjects. The Raphe-Hippocampal tracts were successfully isolated in 464 individuals. There was a significant association between integrity of the Raphe-Hippocampal tract and affective sensitivity. To our best knowledge, this is the first study that isolated the human Raphe-Hippocampal tract. The integrity of the tract showed consistent characteristics with rodent findings, where affective sensitivity is modulated by the Raphe-Hippocampal projection. This study provides a technique to segment the human Raphe-Hippocampal tract and a translational knowledge that the tract in a human possesses consistent characteristics that have been found in rodent studies.
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Affiliation(s)
- Ashley E Sekul
- Department of Chemistry and Biochemistry, University of Mississippi, Oxford, MS, USA
| | - Toshikazu Ikuta
- Department of Communication Sciences, University of Mississippi, Oxford, MS, 38655, USA.
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46
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Bhave VM, Nectow AR. The dorsal raphe nucleus in the control of energy balance. Trends Neurosci 2021; 44:946-960. [PMID: 34663507 DOI: 10.1016/j.tins.2021.09.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 09/04/2021] [Accepted: 09/23/2021] [Indexed: 01/07/2023]
Abstract
Energy balance is orchestrated by an extended network of highly interconnected nuclei across the central nervous system. While much is known about the hypothalamic circuits regulating energy homeostasis, the 'extra-hypothalamic' circuits involved are relatively poorly understood. In this review, we focus on the brainstem's dorsal raphe nucleus (DRN), integrating decades of research linking this structure to the physiologic and behavioral responses that maintain proper energy stores. DRN neurons sense and respond to interoceptive and exteroceptive cues related to energy imbalance and in turn induce appropriate alterations in energy intake and expenditure. The DRN is also molecularly differentiable, with different populations playing distinct and often opposing roles in controlling energy balance. These populations are integrated into the extended circuit known to regulate energy balance. Overall, this review summarizes the key evidence demonstrating an important role for the DRN in regulating energy balance.
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Affiliation(s)
- Varun M Bhave
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Alexander R Nectow
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA.
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47
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Moriya R, Kanamaru M, Okuma N, Yoshikawa A, Tanaka KF, Hokari S, Ohshima Y, Yamanaka A, Honma M, Onimaru H, Kikuchi T, Izumizaki M. Optogenetic activation of DRN 5-HT neurons induced active wakefulness, not quiet wakefulness. Brain Res Bull 2021; 177:129-142. [PMID: 34563634 DOI: 10.1016/j.brainresbull.2021.09.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 09/18/2021] [Accepted: 09/21/2021] [Indexed: 11/16/2022]
Abstract
There has been a long-standing controversy regarding the physiological role of serotonin (5-HT) neurons in the dorsal raphe nucleus (DRN) in sleep/wake architecture. Some studies have reported that 5-HT acts as a sleep-promoting agent, but several studies have suggested that DRN 5-HT neurons function predominantly to promote wakefulness and inhibit rapid eye movement (REM) sleep. Furthermore, recent studies have reported that there is a clear neurobiological difference between a waking state that includes alertness and active exploration (i.e., active wakefulness) and a waking state that is devoid of locomotion (i.e., quiet wakefulness). These states have also been shown to differ clinically in terms of memory consolidation. However, the effects of 5-HT neurons on the regulation of these two different waking states have not been fully elucidated. In the present study, we attempted to examine the physiological role of DRN 5-HT neurons in various sleep/wake states using optogenetic methods that allowed manipulation of cell-type specific neuronal activation with high temporal and anatomical precision. We crossed TPH2-tTA and TetO-ChR2(C128S) mice to obtain mice with channelrhodopsin-2 (ChR2) [C128S]-expressing central 5-HT neurons, and we activated DRN-5HT neurons or medullary 5-HT neurons. Optogenetic activation of DRN 5-HT neurons caused rapid transition from non-REM sleep to active wakefulness, not quiet wakefulness, whereas activation of medullary 5-HT neurons did not appear to affect sleep/wake states or locomotor activity. Our results may shed light on the physiological role of DRN 5-HT neurons in sleep/wake architecture and encourage further investigations of the cortical functional connectivity involved in sleep/wake state regulation.
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Affiliation(s)
- Rika Moriya
- Department of Physiology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan; Department of Respiratory Medicine and Infectious Diseases, Niigata University Graduate School of Medical and Dental Sciences, 757-1 Asahimachi-dori, Chuo-ku, Niigata, Niigata 951-8520, Japan
| | - Mitsuko Kanamaru
- Department of Physiology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Naoki Okuma
- Department of Physiology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Akira Yoshikawa
- Department of Physiology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Kenji F Tanaka
- Department of Neuropsychiatry, Keio University School of Medicine, 35 Shinanomachi, Shinjyuku-ku, Tokyo 160-8582, Japan
| | - Satoshi Hokari
- Department of Respiratory Medicine and Infectious Diseases, Niigata University Graduate School of Medical and Dental Sciences, 757-1 Asahimachi-dori, Chuo-ku, Niigata, Niigata 951-8520, Japan
| | - Yasuyoshi Ohshima
- Department of Respiratory Medicine and Infectious Diseases, Niigata University Graduate School of Medical and Dental Sciences, 757-1 Asahimachi-dori, Chuo-ku, Niigata, Niigata 951-8520, Japan
| | - Akihiro Yamanaka
- Department of Neuroscience II, Research Institute of Environmental Medicine, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Motoyasu Honma
- Department of Physiology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Hiroshi Onimaru
- Department of Physiology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Toshiaki Kikuchi
- Department of Respiratory Medicine and Infectious Diseases, Niigata University Graduate School of Medical and Dental Sciences, 757-1 Asahimachi-dori, Chuo-ku, Niigata, Niigata 951-8520, Japan
| | - Masahiko Izumizaki
- Department of Physiology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan.
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Orexin receptors 1 and 2 in serotonergic neurons differentially regulate peripheral glucose metabolism in obesity. Nat Commun 2021; 12:5249. [PMID: 34475397 PMCID: PMC8413382 DOI: 10.1038/s41467-021-25380-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 08/05/2021] [Indexed: 12/02/2022] Open
Abstract
The wake-active orexin system plays a central role in the dynamic regulation of glucose homeostasis. Here we show orexin receptor type 1 and 2 are predominantly expressed in dorsal raphe nucleus-dorsal and -ventral, respectively. Serotonergic neurons in ventral median raphe nucleus and raphe pallidus selectively express orexin receptor type 1. Inactivation of orexin receptor type 1 in serotonin transporter-expressing cells of mice reduced insulin sensitivity in diet-induced obesity, mainly by decreasing glucose utilization in brown adipose tissue and skeletal muscle. Selective inactivation of orexin receptor type 2 improved glucose tolerance and insulin sensitivity in obese mice, mainly through a decrease in hepatic gluconeogenesis. Optogenetic activation of orexin neurons in lateral hypothalamus or orexinergic fibers innervating raphe pallidus impaired or improved glucose tolerance, respectively. Collectively, the present study assigns orexin signaling in serotonergic neurons critical, yet differential orexin receptor type 1- and 2-dependent functions in the regulation of systemic glucose homeostasis. The wake-active orexin system plays a central role in the dynamic regulation of glucose homeostasis. Here the authors report that inactivation of the orexin receptor type 1 or 2 in serotonergic neurons differentially regulate systemic glucose homeostasis in the context of diet induced obesity.
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49
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Cunha C, Smiley JF, Chuhma N, Shah R, Bleiwas C, Menezes EC, Seal RP, Edwards RH, Rayport S, Ansorge MS, Castellanos FX, Teixeira CM. Perinatal interference with the serotonergic system affects VTA function in the adult via glutamate co-transmission. Mol Psychiatry 2021; 26:4795-4812. [PMID: 32398719 PMCID: PMC7657958 DOI: 10.1038/s41380-020-0763-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 04/07/2020] [Accepted: 04/27/2020] [Indexed: 11/29/2022]
Abstract
Serotonin and dopamine are associated with multiple psychiatric disorders. How they interact during development to affect subsequent behavior remains unknown. Knockout of the serotonin transporter or postnatal blockade with selective serotonin reuptake inhibitors (SSRIs) leads to novelty-induced exploration deficits in adulthood, potentially involving the dopamine system. Here, we show in the mouse that raphe nucleus serotonin neurons activate ventral tegmental area dopamine neurons via glutamate co-transmission and that this co-transmission is reduced in animals exposed postnatally to SSRIs. Blocking serotonin neuron glutamate co-transmission mimics this SSRI-induced hypolocomotion, while optogenetic activation of dopamine neurons reverses this hypolocomotor phenotype. Our data demonstrate that serotonin neurons modulate dopamine neuron activity via glutamate co-transmission and that this pathway is developmentally malleable, with high serotonin levels during early life reducing co-transmission, revealing the basis for the reduced novelty-induced exploration in adulthood due to postnatal SSRI exposure.
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Affiliation(s)
- Catarina Cunha
- Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, 10962, USA
- Department of Child and Adolescent Psychiatry, New York University Grossman School of Medicine, New York, NY, 10016, USA
| | - John F Smiley
- Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, 10962, USA
- Department of Child and Adolescent Psychiatry, New York University Grossman School of Medicine, New York, NY, 10016, USA
| | - Nao Chuhma
- Department of Psychiatry, Columbia University and New York State Psychiatric Institute, New York, NY, 10032, USA
- Department of Molecular Therapeutics, New York State Psychiatric Institute, New York, NY, 10032, USA
| | - Relish Shah
- Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, 10962, USA
| | - Cynthia Bleiwas
- Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, 10962, USA
| | - Edenia C Menezes
- Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, 10962, USA
| | - Rebecca P Seal
- Department of Neurobiology and Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15260, USA
| | - Robert H Edwards
- Departments of Neurology and Physiology, University of California, San Francisco School of Medicine, San Francisco, CA, 94143, USA
| | - Stephen Rayport
- Department of Psychiatry, Columbia University and New York State Psychiatric Institute, New York, NY, 10032, USA
- Department of Molecular Therapeutics, New York State Psychiatric Institute, New York, NY, 10032, USA
| | - Mark S Ansorge
- Department of Psychiatry, Columbia University and New York State Psychiatric Institute, New York, NY, 10032, USA
- Department of Developmental Neuroscience, New York State Psychiatric Institute, New York, NY, 10032, USA
| | - Francisco X Castellanos
- Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, 10962, USA
- Department of Child and Adolescent Psychiatry, New York University Grossman School of Medicine, New York, NY, 10016, USA
| | - Catia M Teixeira
- Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, 10962, USA.
- Department of Child and Adolescent Psychiatry, New York University Grossman School of Medicine, New York, NY, 10016, USA.
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50
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Xiu J, Han R, Liu Z, Li J, Liu S, Shen Y, Ding YQ, Xu Q. Hijacking Dorsal Raphe to Improve Metabolism and Depression-Like Behaviors via BDNF Gene Transfer in Mice. Diabetes 2021; 70:1780-1793. [PMID: 33962999 DOI: 10.2337/db20-1030] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 04/29/2021] [Indexed: 11/13/2022]
Abstract
Moods and metabolism modulate each other. High comorbidity of depression and metabolic disorders, such as diabetes and obesity, poses a great challenge to treat such conditions. Here we report the therapeutic efficacy of brain-derived neurotrophic factor (BDNF) by gene transfer in the dorsal raphe nucleus (DRN) in a chronic unpredictable mild stress model (CUMS) of depression and models of diabetes and obesity. In CUMS, BDNF-expressing mice displayed antidepressant- and anxiolytic-like behaviors, which are associated with augmented serotonergic activity. Both in the diet-induced obesity model (DIO) and in db/db mice, BDNF ameliorated obesity and diabetes, which may be mediated by enhanced sympathetic activity not involving DRN serotonin. Chronic activation of DRN neurons via chemogenetic tools produced similar effects as BDNF in DIO mice. These results established the DRN as a key nexus in regulating depression-like behaviors and metabolism, which can be exploited to combat comorbid depression and metabolic disorders via BDNF gene transfer.
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Affiliation(s)
- Jianbo Xiu
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
- Neuroscience Center, Chinese Academy of Medical Sciences, Beijing, China
| | - Rongrong Han
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
- Neuroscience Center, Chinese Academy of Medical Sciences, Beijing, China
| | - Zeyue Liu
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
- Neuroscience Center, Chinese Academy of Medical Sciences, Beijing, China
| | - Jiayu Li
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
- Neuroscience Center, Chinese Academy of Medical Sciences, Beijing, China
| | - Shu Liu
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
- Neuroscience Center, Chinese Academy of Medical Sciences, Beijing, China
| | - Yan Shen
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
- Neuroscience Center, Chinese Academy of Medical Sciences, Beijing, China
| | - Yu-Qiang Ding
- State Key Laboratory of Medical Neurobiology and Ministry of Education (MOE) Frontiers Center for Brain Science, Institutes of Brain Science, and Department of Laboratory Animal Science, Fudan University, Shanghai, China
| | - Qi Xu
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
- Neuroscience Center, Chinese Academy of Medical Sciences, Beijing, China
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