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Kolling LJ, Khan K, Wang R, Pierson SR, Hartman BD, Balasubramanian N, Guo DF, Rahmouni K, Marcinkiewcz CA. Interaction of serotonin/GLP-1 circuitry in a dual preclinical model for psychiatric disorders and metabolic dysfunction. Psychiatry Res 2024; 337:115951. [PMID: 38735240 DOI: 10.1016/j.psychres.2024.115951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 02/10/2024] [Accepted: 05/04/2024] [Indexed: 05/14/2024]
Abstract
Isolation of rodents throughout adolescence is known to induce many behavioral abnormalities which resemble neuropsychiatric disorders. Separately, this paradigm has also been shown to induce long-term metabolic changes consistent with a pre-diabetic state. Here, we investigate changes in central serotonin (5-HT) and glucagon-like peptide 1 (GLP-1) neurobiology that dually accompany behavioral and metabolic outcomes following social isolation stress throughout adolescence. We find that adolescent-isolation mice exhibit elevated blood glucose levels, impaired peripheral insulin signaling, altered pancreatic function, and fattier body composition without changes in bodyweight. These mice further exhibited disruptions in sleep and enhanced nociception. Using bulk and spatial transcriptomic techniques, we observe broad changes in neural 5-HT, GLP-1, and appetitive circuits. We find 5-HT neurons of adolescent-isolation mice to be more excitable, transcribe fewer copies of Glp1r (mRNA; GLP-1 receptor), and demonstrate resistance to the inhibitory effects of the GLP-1R agonist semaglutide on action potential thresholds. Surprisingly, we find that administration of semaglutide, commonly prescribed to treat metabolic syndrome, induced deficits in social interaction in group-housed mice and rescued social deficits in isolated mice. Overall, we find that central 5-HT circuitry may simultaneously influence mental well-being and metabolic health in this model, via interactions with GLP-1 and proopiomelanocortin circuitry.
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Affiliation(s)
- Louis J Kolling
- Department of Neuroscience and Pharmacology, University of Iowa, Iowa City, IA, USA
| | - Kanza Khan
- Psychological Sciences, Daemen University, Amherst, New York, USA
| | - Ruixiang Wang
- Department of Neuroscience and Pharmacology, University of Iowa, Iowa City, IA, USA
| | - Samantha R Pierson
- Department of Neuroscience and Pharmacology, University of Iowa, Iowa City, IA, USA
| | - Benjamin D Hartman
- Department of Neuroscience and Pharmacology, University of Iowa, Iowa City, IA, USA
| | | | - Deng-Fu Guo
- Department of Neuroscience and Pharmacology, University of Iowa, Iowa City, IA, USA
| | - Kamal Rahmouni
- Department of Neuroscience and Pharmacology, University of Iowa, Iowa City, IA, USA
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Bris ÁG, MacDowell KS, Ulecia-Morón C, Martín-Hernández D, Moreno B, Madrigal JLM, García-Bueno B, Caso JR, Leza JC. Differential regulation of innate immune system in frontal cortex and hippocampus in a "double-hit" neurodevelopmental model in rats. Neurotherapeutics 2024; 21:e00300. [PMID: 38241165 PMCID: PMC10903097 DOI: 10.1016/j.neurot.2023.10.010] [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: 10/17/2023] [Accepted: 10/28/2023] [Indexed: 01/21/2024] Open
Abstract
Neurodevelopmental disorders (NDs) are neuropsychiatric conditions affecting central nervous system development, characterized by cognitive and behavioural alterations. Inflammation has been recently linked to NDs. Animal models are essential for understanding their pathophysiology and identifying therapeutic targets. Double-hit models can reproduce neurodevelopmental and neuroinflammatory impairments. Sixty-seven newborn rats were assigned to four groups: Control, Maternal deprivation (MD, 24-h-deprivation), Isolation (Iso, 5 weeks), and Maternal deprivation + Isolation (MD + Iso, also known as double-hit). Cognitive dysfunction was assessed using behavioural tests. Inflammasome, MAPKs, and TLRs inflammatory elements expression in the frontal cortex (FC) and hippocampus (HP) was analysed through western blot and qRT-PCR. Oxidative/nitrosative (O/N) evaluation and corticosterone levels were measured in plasma samples. Double-hit group was affected in executive and working memory. Most inflammasomes and TLRs inflammatory responses were increased in FC compared to the control group, whilst MAPKs were downregulated. Conversely, hippocampal inflammasome and inflammatory components were reduced after the double-hit exposure, while MAPKs were elevated. Our findings reveal differential regulation of innate immune system components in FC and HP in the double-hit group. Further investigations on MAPKs are necessary to understand their role in regulating HP neuroinflammatory status, potentially linking our MAPKs results to cognitive impairments through their proliferative and anti-inflammatory activity.
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Affiliation(s)
- Álvaro G Bris
- Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid. Centro de Investigación Biomédica en Red de Salud Mental, Instituto de Salud Carlos III (CIBERSAM, ISCIII). Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12) e Instituto Universitario de Investigación en Neuroquímica (IUIN), Spain
| | - Karina S MacDowell
- Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid. Centro de Investigación Biomédica en Red de Salud Mental, Instituto de Salud Carlos III (CIBERSAM, ISCIII). Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12) e Instituto Universitario de Investigación en Neuroquímica (IUIN), Spain
| | - Cristina Ulecia-Morón
- Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid. Centro de Investigación Biomédica en Red de Salud Mental, Instituto de Salud Carlos III (CIBERSAM, ISCIII). Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12) e Instituto Universitario de Investigación en Neuroquímica (IUIN), Spain
| | - David Martín-Hernández
- Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid. Centro de Investigación Biomédica en Red de Salud Mental, Instituto de Salud Carlos III (CIBERSAM, ISCIII). Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12) e Instituto Universitario de Investigación en Neuroquímica (IUIN), Spain
| | - Beatriz Moreno
- Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid. Centro de Investigación Biomédica en Red de Salud Mental, Instituto de Salud Carlos III (CIBERSAM, ISCIII). Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12) e Instituto Universitario de Investigación en Neuroquímica (IUIN), Spain
| | - José L M Madrigal
- Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid. Centro de Investigación Biomédica en Red de Salud Mental, Instituto de Salud Carlos III (CIBERSAM, ISCIII). Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12) e Instituto Universitario de Investigación en Neuroquímica (IUIN), Spain
| | - Borja García-Bueno
- Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid. Centro de Investigación Biomédica en Red de Salud Mental, Instituto de Salud Carlos III (CIBERSAM, ISCIII). Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12) e Instituto Universitario de Investigación en Neuroquímica (IUIN), Spain
| | - Javier R Caso
- Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid. Centro de Investigación Biomédica en Red de Salud Mental, Instituto de Salud Carlos III (CIBERSAM, ISCIII). Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12) e Instituto Universitario de Investigación en Neuroquímica (IUIN), Spain
| | - Juan C Leza
- Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid. Centro de Investigación Biomédica en Red de Salud Mental, Instituto de Salud Carlos III (CIBERSAM, ISCIII). Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12) e Instituto Universitario de Investigación en Neuroquímica (IUIN), Spain.
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Dogra S, Aguayo C, Xiang Z, Putnam J, Smith J, Johnston C, Foster DJ, Lindsley CW, Niswender CM, Conn PJ. Activation of Metabotropic Glutamate Receptor 3 Modulates Thalamo-accumbal Transmission and Rescues Schizophrenia-like Physiological and Behavioral Deficits. Biol Psychiatry 2023:S0006-3223(23)01753-5. [PMID: 38061467 PMCID: PMC11150332 DOI: 10.1016/j.biopsych.2023.11.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 01/04/2024]
Abstract
BACKGROUND Polymorphisms in the gene encoding for metabotropic glutamate receptor 3 (mGlu3) are associated with an increased likelihood of schizophrenia diagnosis and can predict improvements in negative symptoms following treatment with antipsychotics. However, the mechanisms by which mGlu3 can regulate brain circuits involved in schizophrenia pathophysiology are not clear. METHODS We employed selective pharmacological tools and a variety of approaches including whole-cell patch-clamp electrophysiology, slice optogenetics, and fiber photometry to investigate the effects of mGlu3 activation on phencyclidine (PCP)-induced impairments in thalamo-accumbal transmission and sociability deficits. A chemogenetic approach was used to evaluate the role of thalamo-accumbal transmission in PCP-induced sociability deficits. RESULTS We first established that PCP treatment augmented excitatory transmission onto dopamine D1 receptor-expressing medium spiny neurons (D1-MSNs) in the nucleus accumbens (NAc) and induced sociability deficits. Our studies revealed a selective increase in glutamatergic synaptic transmission from thalamic afferents to D1-MSNs in the NAc shell. Chemogenetic silencing of thalamo-accumbal inputs rescued PCP-induced sociability deficits. Pharmacological activation of mGlu3 normalized PCP-induced impairments in thalamo-accumbal transmission and sociability deficits. Mechanistic studies revealed that mGlu3 activation induced robust long-term depression at synapses from the thalamic projections onto D1-MSNs in the NAc shell. CONCLUSIONS These data demonstrate that activation of mGlu3 decreases thalamo-accumbal transmission and thereby rescues sociability deficits in mouse modeling schizophrenia-like symptoms. These findings provide novel insights into the NAc-specific mechanisms and suggest that agents modulating glutamatergic signaling in the NAc may provide a promising approach for treating negative symptoms in schizophrenia.
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Affiliation(s)
- Shalini Dogra
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee; Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee.
| | - Caleb Aguayo
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee; Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee
| | - Zixiu Xiang
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee; Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee
| | - Jason Putnam
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee; Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee
| | - Joshua Smith
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee; Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee
| | - Curran Johnston
- Department of Pharmacology, Physiology and Neuroscience, University of South Carolina School of Medicine, Columbia, South Carolina
| | - Daniel J Foster
- Department of Pharmacology, Physiology and Neuroscience, University of South Carolina School of Medicine, Columbia, South Carolina
| | - Craig W Lindsley
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee; Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee; Department of Chemistry, Vanderbilt University, Nashville, Tennessee; Vanderbilt Institute for Chemical Biology, Vanderbilt University, Nashville, Tennessee
| | - Colleen M Niswender
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee; Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee; Vanderbilt Kennedy Center, Vanderbilt University, Nashville, Tennessee; Vanderbilt Institute for Chemical Biology, Vanderbilt University, Nashville, Tennessee
| | - P Jeffrey Conn
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee; Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee; Vanderbilt Kennedy Center, Vanderbilt University, Nashville, Tennessee; Vanderbilt Institute for Chemical Biology, Vanderbilt University, Nashville, Tennessee.
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Jimenez AM, Green MF. Understanding the Causal Pathway of Social Determinants of Psychosis: The Role of Social Functioning, Relevance of Animal Models, and Implications for Treatment. Schizophr Bull 2023; 49:1422-1424. [PMID: 37672342 PMCID: PMC10686331 DOI: 10.1093/schbul/sbad133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 08/25/2023] [Indexed: 09/08/2023]
Abstract
There is mounting evidence that the social determinants of psychosis operate via a long and circuitous route. Here, we comment on the striking findings from a recent study by Ku et al., that area-level social environmental factors yield social disability and increased risk for schizophrenia through intervening variables and over a long time course. We discuss the relevance of animal models of social isolation to understand how environmental factors interrelate with individual-level mechanisms. We also discuss treatment implications, including the search for novel psychopharmacological treatments for reduced social motivation, and the need for a comprehensive prediction and prevention model.
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Affiliation(s)
- Amy M Jimenez
- Department of Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA
- Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA
| | - Michael F Green
- Department of Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA
- Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA
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