1
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Oliva HNP, Prudente TP, Nunes EJ, Cosgrove KP, Radhakrishnan R, Potenza MN, Angarita GA. Substance use and spine density: a systematic review and meta-analysis of preclinical studies. Mol Psychiatry 2024; 29:2873-2885. [PMID: 38561468 DOI: 10.1038/s41380-024-02519-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 02/28/2024] [Accepted: 03/04/2024] [Indexed: 04/04/2024]
Abstract
The elucidation of synaptic density changes provides valuable insights into the underlying brain mechanisms of substance use. In preclinical studies, synaptic density markers, like spine density, are altered by substances of abuse (e.g., alcohol, amphetamine, cannabis, cocaine, opioids, nicotine). These changes could be linked to phenomena including behavioral sensitization and drug self-administration in rodents. However, studies have produced heterogeneous results for spine density across substances and brain regions. Identifying patterns will inform translational studies given tools that now exist to measure in vivo synaptic density in humans. We performed a meta-analysis of preclinical studies to identify consistent findings across studies. PubMed, ScienceDirect, Scopus, and EBSCO were searched between September 2022 and September 2023, based on a protocol (PROSPERO: CRD42022354006). We screened 6083 publications and included 70 for meta-analysis. The meta-analysis revealed drug-specific patterns in spine density changes. Hippocampal spine density increased after amphetamine. Amphetamine, cocaine, and nicotine increased spine density in the nucleus accumbens. Alcohol and amphetamine increased, and cannabis reduced, spine density in the prefrontal cortex. There was no convergence of findings for morphine's effects. The effects of cocaine on the prefrontal cortex presented contrasting results compared to human studies, warranting further investigation. Publication bias was small for alcohol or morphine and substantial for the other substances. Heterogeneity was moderate-to-high across all substances. Nonetheless, these findings inform current translational efforts examining spine density in humans with substance use disorders.
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Affiliation(s)
- Henrique Nunes Pereira Oliva
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
- Clinical Neuroscience Research Unit, Connecticut Mental Health Center, New Haven, CT, USA
| | - Tiago Paiva Prudente
- Faculdade de Medicina, Universidade Federal de Goiás (UFG), Goiânia, Goiás, Brazil
| | - Eric J Nunes
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
- Yale Tobacco Center of Regulatory Science, Yale University School of Medicine, New Haven, CT, USA
| | - Kelly P Cosgrove
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - Rajiv Radhakrishnan
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - Marc N Potenza
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
- Clinical Neuroscience Research Unit, Connecticut Mental Health Center, New Haven, CT, USA
- Child Study Center, Yale University School of Medicine, New Haven, CT, USA
- Department of Neuroscience, Yale University, New Haven, CT, USA
- Connecticut Council on Problem Gambling, Wethersfield, CT, USA
- Wu Tsai Institute, Yale University, New Haven, CT, USA
| | - Gustavo A Angarita
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA.
- Clinical Neuroscience Research Unit, Connecticut Mental Health Center, New Haven, CT, USA.
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2
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Mangutov E, Pradhan AA. Tiam1 is part of a novel mechanism for morphine tolerance and hyperalgesia. Brain 2024; 147:2264-2266. [PMID: 38805748 PMCID: PMC11224590 DOI: 10.1093/brain/awae170] [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: 05/20/2024] [Accepted: 05/20/2024] [Indexed: 05/30/2024] Open
Abstract
This scientific commentary refers to ‘Tiam1-mediated maladaptive plasticity underlying morphine tolerance and hyperalgesia’ by Yao et al. (https://doi.org/10.1093/brain/awae106).
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Affiliation(s)
- Elizaveta Mangutov
- Center for Clinical Pharmacology, Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Amynah A Pradhan
- Center for Clinical Pharmacology, Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, USA
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3
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Markovic T, Higginbotham J, Ruyle B, Massaly N, Yoon HJ, Kuo CC, Kim JR, Yi J, Garcia JJ, Sze E, Abt J, Teich RH, Dearman JJ, McCall JG, Morón JA. A locus coeruleus to dorsal hippocampus pathway mediates cue-induced reinstatement of opioid self-administration in male and female rats. Neuropsychopharmacology 2024; 49:915-923. [PMID: 38374364 PMCID: PMC11039689 DOI: 10.1038/s41386-024-01828-z] [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: 07/03/2023] [Revised: 02/06/2024] [Accepted: 02/07/2024] [Indexed: 02/21/2024]
Abstract
Opioid use disorder is a chronic relapsing disorder encompassing misuse, dependence, and addiction to opioid drugs. Long term maintenance of associations between the reinforcing effects of the drug and the cues associated with its intake are a leading cause of relapse. Indeed, exposure to the salient drug-associated cues can lead to drug cravings and drug seeking behavior. The dorsal hippocampus (dHPC) and locus coeruleus (LC) have emerged as important structures for linking the subjective rewarding effects of opioids with environmental cues. However, their role in cue-induced reinstatement of opioid use remains to be further elucidated. In this study, we showed that chemogenetic inhibition of excitatory dHPC neurons during re-exposure to drug-associated cues significantly attenuates cue-induced reinstatement of morphine-seeking behavior. In addition, the same manipulation reduced reinstatement of sucrose-seeking behavior but failed to alter memory recall in the object location task. Finally, intact activity of tyrosine hydroxylase (TH) LC-dHPCTh afferents is necessary to drive cue induced reinstatement of morphine-seeking as inhibition of this pathway blunts cue-induced drug-seeking behavior. Altogether, these studies show an important role of the dHPC and LC-dHPCTh pathway in mediating cue-induced reinstatement of opioid seeking.
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Affiliation(s)
- Tamara Markovic
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, USA
| | - Jessica Higginbotham
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, USA
| | - Brian Ruyle
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, USA
| | - Nicolas Massaly
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, USA
| | - Hye Jean Yoon
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, USA
| | - Chao-Cheng Kuo
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Pharmaceutical and Administrative Sciences, St. Louis College of Pharmacy, St. Louis, MO, USA
- Center for Clinical Pharmacology, St. Louis College of Pharmacy and Washington University in St. Louis, St. Louis, MO, USA
| | - Jenny R Kim
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Pharmaceutical and Administrative Sciences, St. Louis College of Pharmacy, St. Louis, MO, USA
- Center for Clinical Pharmacology, St. Louis College of Pharmacy and Washington University in St. Louis, St. Louis, MO, USA
| | - Jiwon Yi
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, USA
| | - Jeniffer J Garcia
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, USA
| | - Eric Sze
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, USA
| | - Julian Abt
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, USA
| | - Rachel H Teich
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, USA
| | - Joanna J Dearman
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, USA
| | - Jordan G McCall
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA
- Pain Center, Washington University in St Louis, St. Louis, MO, USA
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA
- Department of Pharmaceutical and Administrative Sciences, St. Louis College of Pharmacy, St. Louis, MO, USA
- Center for Clinical Pharmacology, St. Louis College of Pharmacy and Washington University in St. Louis, St. Louis, MO, USA
| | - Jose A Morón
- Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO, USA.
- Pain Center, Washington University in St Louis, St. Louis, MO, USA.
- School of Medicine, Washington University in St Louis, St. Louis, MO, USA.
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, USA.
- Department of Psychiatry, Washington University in St. Louis, St. Louis, MO, USA.
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4
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Nejad GG, Mottarlini F, Tavassoli Z, Caffino L, Fumagalli F, Homberg JR, Fathollahi Y. Conditioned morphine tolerance promotes neurogenesis, dendritic remodelling and pro-plasticity molecules in the adult rat hippocampus. Addict Biol 2024; 29:e13377. [PMID: 38506630 PMCID: PMC11061850 DOI: 10.1111/adb.13377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 01/16/2024] [Accepted: 01/16/2024] [Indexed: 03/21/2024]
Abstract
Structural neuroplasticity of the hippocampus in the form of neurogenesis and dendritic remodelling underlying morphine tolerance is still less known. Therefore, in this study, we aimed to assess whether unconditioned- and conditioned-morphine tolerance can trigger structural neuroplasticity in the dorsal and ventral parts of the adult male rat hippocampus. Evaluation of the levels of neurogenesis markers (Ki67 and DCX) by immunohistochemistry shows that conditioned morphine tolerance is sufficient to increase the baseline topographic level of hippocampal neurogenesis in adult rats. Dendritic spine visualization by Golgi staining shows that the behavioural testing paradigms themselves are sufficient to trigger the hippocampus subregion-specific changes in the dendritic remodelling along the apical dendrites of hippocampal CA1 pyramidal neurons and dentate granule cells in adult rats. Quantitative reverse transcription polymerase chain reaction of Bdnf, Trkb, Rac-1 and RhoA mRNA levels as pro-plasticity molecules, shows that the conditioned morphine tolerance is effective in changing Bdnf and RhoA mRNA levels in the ventral hippocampus of adult rats. In summary, we demonstrate that the acquisition of morphine tolerance promotes adult neurogenesis, dendritic remodelling and pro-plasticity molecules such as Bdnf/Trkb in the rat hippocampus. Indeed, the structural neuroplasticity of the hippocampus may underlie the newly formed aberrant memory and could provide the initial basis for understanding the neurobiological mechanisms of morphine-tolerance plasticity in the hippocampus.
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Affiliation(s)
- Ghazaleh Ghamkhari Nejad
- Department of Physiology, Faculty of Medical SciencesTarbiat Modares UniversityTehranIran
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and BehaviourRadboud University Medical CentreNijmegenthe Netherlands
| | - Francesca Mottarlini
- Department of Pharmacological and Biomolecular Sciences “Rodolfo Paoletti”Università degli Studi di MilanoMilanItaly
| | - Zohreh Tavassoli
- Department of Physiology, Faculty of Medical SciencesTarbiat Modares UniversityTehranIran
| | - Lucia Caffino
- Department of Pharmacological and Biomolecular Sciences “Rodolfo Paoletti”Università degli Studi di MilanoMilanItaly
| | - Fabio Fumagalli
- Department of Pharmacological and Biomolecular Sciences “Rodolfo Paoletti”Università degli Studi di MilanoMilanItaly
| | - Judith R. Homberg
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and BehaviourRadboud University Medical CentreNijmegenthe Netherlands
| | - Yaghoub Fathollahi
- Department of Physiology, Faculty of Medical SciencesTarbiat Modares UniversityTehranIran
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5
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Ibrahim KM, Massaly N, Yoon HJ, Sandoval R, Widman AJ, Heuermann RJ, Williams S, Post W, Pathiranage S, Lintz T, Zec A, Park A, Yu W, Kash TL, Gereau RW, Morón JA. Dorsal hippocampus to nucleus accumbens projections drive reinforcement via activation of accumbal dynorphin neurons. Nat Commun 2024; 15:750. [PMID: 38286800 PMCID: PMC10825206 DOI: 10.1038/s41467-024-44836-9] [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: 08/02/2022] [Accepted: 01/04/2024] [Indexed: 01/31/2024] Open
Abstract
The hippocampus is pivotal in integrating emotional processing, learning, memory, and reward-related behaviors. The dorsal hippocampus (dHPC) is particularly crucial for episodic, spatial, and associative memory, and has been shown to be necessary for context- and cue-associated reward behaviors. The nucleus accumbens (NAc), a central structure in the mesolimbic reward pathway, integrates the salience of aversive and rewarding stimuli. Despite extensive research on dHPC→NAc direct projections, their sufficiency in driving reinforcement and reward-related behavior remains to be determined. Our study establishes that activating excitatory neurons in the dHPC is sufficient to induce reinforcing behaviors through its direct projections to the dorso-medial subregion of the NAc shell (dmNAcSh). Notably, dynorphin-containing neurons specifically contribute to dHPC-driven reinforcing behavior, even though both dmNAcSh dynorphin- and enkephalin-containing neurons are activated with dHPC stimulation. Our findings unveil a pathway governing reinforcement, advancing our understanding of the hippocampal circuity's role in reward-seeking behaviors.
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Affiliation(s)
- Khairunisa Mohamad Ibrahim
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
| | - Nicolas Massaly
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
- Department of Anesthesiology and Perioperative Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Hye-Jean Yoon
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
| | - Rossana Sandoval
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
| | - Allie J Widman
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
| | - Robert J Heuermann
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
- Department of Neurology, Washington University Pain Center, St. Louis, MO, 63110, USA
| | - Sidney Williams
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
| | - William Post
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
| | - Sulan Pathiranage
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
| | - Tania Lintz
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
| | - Azra Zec
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
| | - Ashley Park
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
| | - Waylin Yu
- Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, 27599, USA
- Department of Pharmacology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, 27599, USA
| | - Thomas L Kash
- Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, 27599, USA
- Department of Pharmacology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, 27599, USA
| | - Robert W Gereau
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, 63110, USA
| | - Jose A Morón
- Department of Anesthesiology, Washington University Pain Center, St. Louis, MO, 63110, USA.
- Washington University in St. Louis, School of Medicine, St. Louis, MO, 63110, USA.
- Department of Neuroscience, Washington University in St. Louis, St. Louis, MO, 63110, USA.
- Department of Psychiatry, Washington University in St. Louis, St. Louis, MO, 63110, USA.
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6
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Akbari M, Parsaei H, Sedaghat K, Mousavi F. Attenuation of morphine conditioned place preference and reinstatement by vitamin D. Behav Pharmacol 2023; 34:404-410. [PMID: 37581227 DOI: 10.1097/fbp.0000000000000747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
Opioid action in the brain involves the dopamine-reward system as well as non-dopamine pathways. Since vitamin D also modulates the brain's dopamine system, the question of this study was how vitamin D might affect the opioid influences on the reward system. Therefore, the objective of this study was to investigate the possible effect of vitamin D on the conditioned place preference (CPP) induced by morphine, as a valuable model of assessment of the reinforcing properties of opioids by associating the context to the rewarding properties of the addictive drugs. Male Wistar rats were randomly divided into two main groups that either received saline (morphine vehicle) or morphine (5 mg/kg, intraperitoneally) for CPP. Each of the main groups was divided into three vitamin D treatment subgroups: vitamin D vehicle and vitamin D (5 and 10 μg/kg, intraperitoneally). Vitamin D injections were started 1 week ahead of the experiment (two injections) or immediately after post-conditioning and in both cases, it was continued twice weekly throughout the CPP. Administration of vitamin D (10 μg/kg) before conditioning in CPP markedly attenuated morphine expression in the post-conditioning test. Receiving vitamin D (5 or 10 μg/kg) before or after conditioning significantly attenuated morphine reinstatement. Administration of vitamin D after opioid conditioning facilitated morphine memory extinction and attenuated morphine reinstatement. Vitamin D is probably a valuable addition to be considered as a part of the treatment for prevention or minimizing the dependency or relapse to opioids.
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Affiliation(s)
- Mahdieh Akbari
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan
| | - Houman Parsaei
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Katayoun Sedaghat
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan
| | - Fatemeh Mousavi
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan
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7
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Fadaei-Kenarsary M, Esmaeilpour K, Shabani M, Sheibani V. Chronic maternal morphine exposure and early-life adversity induce impairment in synaptic plasticity of adolescent male rats. Neurosci Lett 2023; 812:137365. [PMID: 37393006 DOI: 10.1016/j.neulet.2023.137365] [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: 05/03/2023] [Revised: 06/26/2023] [Accepted: 06/28/2023] [Indexed: 07/03/2023]
Abstract
Maternal morphine exposure has negative consequences for learning and memory in the offspring. Interaction between mothers and pups has a crucial effect on the mammal's development. Maternal Separation (MS) can cause behavioral and neuropsychiatric problems later in life. It seems that adolescents are more susceptible to the effects of early life stress; evidence for the combinatory effects of oral chronic maternal morphine exposure and MS in the CA1 area of the hippocampus in the male adolescent offspring is not found. Therefore, this study aimed to evaluate the effects of chronic maternal morphine consumption (21 days before and after mating, and gestation), and MS (180 min/day from postnatal day (PND) 1-21) on the synaptic plasticity of male offspring in mid-adolescence. Control, MS, Vehicle (V), Morphine, V + MS, and Morphine + MS groups were tested for in vivo field potential recording from the CA1 area of the hippocampus. The current results demonstrated that chronic maternal morphine exposure impaired the induction of early long-term potentiation (LTP). MS impaired average fEPSPs, induction of early-LTP and maintenance. Chronic maternal morphine exposure in combination with MS impaired the induction of early LTP but didn't deteriorate maintenance and the average field excitatory post-synaptic potentials (fEPSPs) measured in two hours. Prepulse facilitation ratios remained undisturbed and I/O curves showed decreased fEPSP slopes at high stimulus intensities in combinatory group. We concluded that chronic maternal morphine exposure in combination with MS negatively affects synaptic plasticity in the CA1 area in male adolescent offspring.
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Affiliation(s)
- Maysam Fadaei-Kenarsary
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Khadijeh Esmaeilpour
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran; Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario, Canada
| | - Mohammad Shabani
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Vahid Sheibani
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.
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8
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Ru Q, Wang Y, Zhou E, Chen L, Wu Y. The potential therapeutic roles of Rho GTPases in substance dependence. Front Mol Neurosci 2023; 16:1125277. [PMID: 37063367 PMCID: PMC10097952 DOI: 10.3389/fnmol.2023.1125277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 03/14/2023] [Indexed: 04/03/2023] Open
Abstract
Rho GTPases family are considered to be molecular switches that regulate various cellular processes, including cytoskeleton remodeling, cell polarity, synaptic development and maintenance. Accumulating evidence shows that Rho GTPases are involved in neuronal development and brain diseases, including substance dependence. However, the functions of Rho GTPases in substance dependence are divergent and cerebral nuclei-dependent. Thereby, comprehensive integration of their roles and correlated mechanisms are urgently needed. In this review, the molecular functions and regulatory mechanisms of Rho GTPases and their regulators such as GTPase-activating proteins (GAPs) and guanine nucleotide exchange factors (GEFs) in substance dependence have been reviewed, and this is of great significance for understanding their spatiotemporal roles in addictions induced by different addictive substances and in different stages of substance dependence.
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Affiliation(s)
| | | | | | - Lin Chen
- *Correspondence: Lin Chen, ; Yuxiang Wu,
| | - Yuxiang Wu
- *Correspondence: Lin Chen, ; Yuxiang Wu,
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9
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Mulvey B, Frye HE, Lintz T, Fass S, Tycksen E, Nelson EC, Morón JA, Dougherty JD. Cnih3 Deletion Dysregulates Dorsal Hippocampal Transcription across the Estrous Cycle. eNeuro 2023; 10:ENEURO.0153-22.2023. [PMID: 36849260 PMCID: PMC10027183 DOI: 10.1523/eneuro.0153-22.2023] [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: 04/08/2022] [Revised: 02/14/2023] [Accepted: 02/17/2023] [Indexed: 03/01/2023] Open
Abstract
In females, the hippocampus, a critical brain region for coordination of learning, memory, and behavior, displays altered physiology and behavioral output across the estrous or menstrual cycle. However, the molecular effectors and cell types underlying these observed cyclic changes have only been partially characterized to date. Recently, profiling of mice null for the AMPA receptor trafficking gene Cnih3 have demonstrated estrous-dependent phenotypes in dorsal hippocampal synaptic plasticity, composition, and learning/memory. We therefore profiled dorsal hippocampal transcriptomes from female mice in each estrous cycle stage, and contrasted it with that of males, across wild-type (WT) and Cnih3 mutants. In wild types, we identified only subtle differences in gene expression between the sexes, while comparing estrous stages to one another revealed up to >1000 differentially expressed genes (DEGs). These estrous-responsive genes are especially enriched in gene markers of oligodendrocytes and the dentate gyrus, and in functional gene sets relating to estrogen response, potassium channels, and synaptic gene splicing. Surprisingly, Cnih3 knock-outs (KOs) showed far broader transcriptomic differences between estrous cycle stages and males. Moreover, Cnih3 knock-out drove subtle but extensive expression changes accentuating sex differential expression at diestrus and estrus. Altogether, our profiling highlights cell types and molecular systems potentially impacted by estrous-specific gene expression patterns in the adult dorsal hippocampus, enabling mechanistic hypothesis generation for future studies of sex-differential neuropsychiatric function and dysfunction. Moreover, these findings suggest an unrecognized role of Cnih3 in buffering against transcriptional effects of estrous, providing a candidate molecular mechanism to explain estrous-dependent phenotypes observed with Cnih3 loss.
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Affiliation(s)
- Bernard Mulvey
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110
| | - Hannah E Frye
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO 63110
| | - Tania Lintz
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO 63110
| | - Stuart Fass
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110
| | - Eric Tycksen
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110
- McDonnell Genome Institute, Washington University School of Medicine, St. Louis, MO 63110
| | - Elliot C Nelson
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110
| | - Jose A Morón
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO 63110
| | - Joseph D Dougherty
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110
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10
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Jamali S, Dezfouli MP, Kalbasi A, Daliri MR, Haghparast A. Selective Modulation of Hippocampal Theta Oscillations in Response to Morphine versus Natural Reward. Brain Sci 2023; 13:322. [PMID: 36831866 PMCID: PMC9953863 DOI: 10.3390/brainsci13020322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/08/2023] [Accepted: 02/09/2023] [Indexed: 02/16/2023] Open
Abstract
Despite the overlapping neural circuits underlying natural and drug rewards, several studies have suggested different behavioral and neurochemical mechanisms in response to drug vs. natural rewards. The strong link between hippocampal theta oscillations (4-12 Hz) and reward-associated learning and memory has raised the hypothesis that this rhythm in hippocampal CA1 might be differently modulated by drug- and natural-conditioned place preference (CPP). Time-frequency analysis of recorded local field potentials (LFPs) from the CA1 of freely moving male rats previously exposed to a natural (in this case, food), drug (in this case, morphine), or saline (control) reward cue in the CPP paradigm showed that the hippocampal CA1 theta activity represents a different pattern for entrance to the rewarded compared to unrewarded compartment during the post-test session of morphine- and natural-CPP. Comparing LFP activity in the CA1 between the saline and morphine/natural groups showed that the maximum theta power occurred before entering the unrewarded compartment and after the entrance to the rewarded compartment in morphine and natural groups, respectively. In conclusion, our findings suggest that drug and natural rewards could differently affect the theta dynamic in the hippocampal CA1 region during reward-associated learning and contextual cueing in the CPP paradigm.
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Affiliation(s)
- Shole Jamali
- Neuroscience Research Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran P.O. Box 19615-1178, Iran
| | - Mohsen Parto Dezfouli
- School of Cognitive Sciences, Institute for Research in Fundamental Sciences, Tehran P.O. Box 19395-5531, Iran
| | - AmirAli Kalbasi
- Department of Mechatronics, Faculty of Electrical Engineering, K. N. Toosi University of Technology, Tehran P.O. Box 16315-1355, Iran
| | - Mohammad Reza Daliri
- School of Cognitive Sciences, Institute for Research in Fundamental Sciences, Tehran P.O. Box 19395-5531, Iran
- Biomedical Engineering Department, School of Electrical Engineering, Iran University of Science and Technology, Tehran P.O. Box 16846-13114, Iran
| | - Abbas Haghparast
- Neuroscience Research Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran P.O. Box 19615-1178, Iran
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11
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Li H, Chen R, Zhou Y, Wang H, Sun L, Yang Z, Bai L, Zhang J. Endocannabinoids regulate cocaine-associated memory through brain AEA-CB1R signalling activation. Mol Metab 2022; 65:101597. [PMID: 36096452 PMCID: PMC9508352 DOI: 10.1016/j.molmet.2022.101597] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/06/2022] [Accepted: 09/06/2022] [Indexed: 11/25/2022] Open
Abstract
Objective Contextual drug-associated memory precipitates craving and relapse in substance users, and the risk of relapse is a major challenge in the treatment of substance use disorders. Thus, understanding the neurobiological underpinnings of how this association memory is formed and maintained will inform future advances in the treatment of drug addiction. Brain endocannabinoids (eCBs) signalling has been associated with drug-induced neuroadaptations, but the role of lipases that mediate small lipid ligand biosynthesis and metabolism in regulating drug-associated memory has not been examined. Here, we explored how manipulation of the lipase fatty acid amide hydrolase (FAAH), which is involved in mediating the level of the lipid ligand anandamide (AEA), affects cocaine-associated memory formation. Methods We applied behavioural, pharmacological and biochemical methods to detect cocaine-associated memory formation, eCBs in the dorsal dentate gyrus (dDG), and the activity of related enzymes. We further examined the roles of abnormal FAAH activity and AEA–CB1R signalling in the regulation of cocaine-associated memory formation and granule neuron dendritic structure alterations in the dDG through Western blotting, electron microscopy and immunofluorescence. Results In the present study, we found that cocaine induced a decrease in the level of FAAH in the dDG and increased the level of AEA. A high level of AEA activated cannabinoid type 1 receptors (CB1Rs) and further triggered CB1R signalling activation and granule neuron dendritic remodelling, and these effects were reversed by blockade of CB1Rs in the brain. Furthermore, inhibition of FAAH in the dDG markedly increased AEA levels and promoted cocaine-associated memory formation through CB1R signalling activation. Conclusions Together, our findings demonstrate that the lipase FAAH influences CB1R signalling activation and granule neuron dendritic structure alteration in the dDG by regulating AEA levels and that AEA and AEA metabolism play a key role in cocaine-associated memory formation. Manipulation of AEA production may serve as a potential therapeutic strategy for drug addiction and relapse prevention. AEA plays an important role in the cocaine-associated memory formation through triggering CB1Rs. Cocaine decreases FAAH level and leads to AEA increasing, which activate CB1R signaling and remodel dendritic spines structure of granule neurons. Regulating AEA degradation through manipulation of FAAH, governs the cocaine-associated memory formation.
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Affiliation(s)
- Hongchun Li
- National Chengdu Center for Safety Evaluation of Drugs, State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, China.
| | - Rong Chen
- National Chengdu Center for Safety Evaluation of Drugs, State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Yuanyi Zhou
- National Chengdu Center for Safety Evaluation of Drugs, State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Haichuan Wang
- Department of Pediatrics, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Luqiang Sun
- Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Zhen Yang
- Histology and Imaging Platform, Core Facilities of West China Hospital, Sichuan University, Chengdu 610041, China
| | - Lin Bai
- Histology and Imaging Platform, Core Facilities of West China Hospital, Sichuan University, Chengdu 610041, China
| | - Jie Zhang
- Histology and Imaging Platform, Core Facilities of West China Hospital, Sichuan University, Chengdu 610041, China
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12
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Cai WT, Kim WY, Kwak MJ, Rim H, Lee SE, Riecken LB, Morrison H, Kim J. Disruption of amphetamine sensitization by alteration of dendritic thin spines in the nucleus accumbens core. J Neurochem 2022; 161:266-280. [DOI: 10.1111/jnc.15582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/17/2022] [Accepted: 01/20/2022] [Indexed: 11/28/2022]
Affiliation(s)
- Wen Ting Cai
- Department of Physiology Yonsei University College of Medicine Seoul Republic of Korea
| | - Wha Young Kim
- Department of Physiology Yonsei University College of Medicine Seoul Republic of Korea
| | - Myung Ji Kwak
- Department of Medical Sciences Yonsei University College of Medicine Seoul Republic of Korea
| | - Haeun Rim
- Department of Medical Sciences Yonsei University College of Medicine Seoul Republic of Korea
| | - Seung Eun Lee
- Virus Facility, Research Animal Source Center Korea Institute of Science and Technology Seoul Republic of Korea
| | | | - Helen Morrison
- Leibniz Institute on Aging Fritz Lipmann Institute Jena Germany
| | - Jeong‐Hoon Kim
- Department of Physiology Yonsei University College of Medicine Seoul Republic of Korea
- Department of Medical Sciences Yonsei University College of Medicine Seoul Republic of Korea
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13
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A short period of early life oxytocin treatment rescues social behavior dysfunction via suppression of hippocampal hyperactivity in male mice. Mol Psychiatry 2022; 27:4157-4171. [PMID: 35840800 PMCID: PMC9718675 DOI: 10.1038/s41380-022-01692-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/22/2022] [Accepted: 06/29/2022] [Indexed: 02/07/2023]
Abstract
Early sensory experiences interact with genes to shape precise neural circuits during development. This process is vital for proper brain function in adulthood. Neurological dysfunctions caused by environmental alterations and/or genetic mutation may share the same molecular or cellular mechanisms. Here, we show that early life bilateral whisker trimming (BWT) subsequently affects social discrimination in adult male mice. Enhanced activation of the hippocampal dorsal CA3 (dCA3) in BWT mice was observed during social preference tests. Optogenetic activation of dCA3 in naive mice impaired social discrimination, whereas chemogenetic silencing of dCA3 rescued social discrimination deficit in BWT mice. Hippocampal oxytocin (OXT) is reduced after whisker trimming. Neonatal intraventricular compensation of OXT relieved dCA3 over-activation and prevented social dysfunction. Neonatal knockdown of OXT receptor in dCA3 mimics the effects of BWT, and cannot be rescued by OXT treatment. Social behavior deficits in a fragile X syndrome mouse model (Fmr1 KO mice) could also be recovered by early life OXT treatment, through negating dCA3 over-activation. Here, a possible avenue to prevent social dysfunction is uncovered.
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14
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Duman JG, Blanco FA, Cronkite CA, Ru Q, Erikson KC, Mulherkar S, Saifullah AB, Firozi K, Tolias KF. Rac-maninoff and Rho-vel: The symphony of Rho-GTPase signaling at excitatory synapses. Small GTPases 2022; 13:14-47. [PMID: 33955328 PMCID: PMC9707551 DOI: 10.1080/21541248.2021.1885264] [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] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 01/22/2021] [Accepted: 01/28/2021] [Indexed: 01/15/2023] Open
Abstract
Synaptic connections between neurons are essential for every facet of human cognition and are thus regulated with extreme precision. Rho-family GTPases, molecular switches that cycle between an active GTP-bound state and an inactive GDP-bound state, comprise a critical feature of synaptic regulation. Rho-GTPases are exquisitely controlled by an extensive suite of activators (GEFs) and inhibitors (GAPs and GDIs) and interact with many different signalling pathways to fulfill their roles in orchestrating the development, maintenance, and plasticity of excitatory synapses of the central nervous system. Among the mechanisms that control Rho-GTPase activity and signalling are cell surface receptors, GEF/GAP complexes that tightly regulate single Rho-GTPase dynamics, GEF/GAP and GEF/GEF functional complexes that coordinate multiple Rho-family GTPase activities, effector positive feedback loops, and mutual antagonism of opposing Rho-GTPase pathways. These complex regulatory mechanisms are employed by the cells of the nervous system in almost every step of development, and prominently figure into the processes of synaptic plasticity that underlie learning and memory. Finally, misregulation of Rho-GTPases plays critical roles in responses to neuronal injury, such as traumatic brain injury and neuropathic pain, and in neurodevelopmental and neurodegenerative disorders, including intellectual disability, autism spectrum disorder, schizophrenia, and Alzheimer's Disease. Thus, decoding the mechanisms of Rho-GTPase regulation and function at excitatory synapses has great potential for combatting many of the biggest current challenges in mental health.
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Affiliation(s)
- Joseph G. Duman
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA
| | - Francisco A. Blanco
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA
- Integrative Molecular and Biomedical Science Graduate Program, Baylor College of Medicine, Houston, TX, USA
| | - Christopher A. Cronkite
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, USA
| | - Qin Ru
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA
| | - Kelly C. Erikson
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA
| | - Shalaka Mulherkar
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA
| | - Ali Bin Saifullah
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA
| | - Karen Firozi
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA
| | - Kimberley F. Tolias
- Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA
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15
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Frye HE, Izumi Y, Harris AN, Williams SB, Trousdale CR, Sun MY, Sauerbeck AD, Kummer TT, Mennerick S, Zorumski CF, Nelson EC, Dougherty JD, Morón JA. Sex Differences in the Role of CNIH3 on Spatial Memory and Synaptic Plasticity. Biol Psychiatry 2021; 90:766-780. [PMID: 34548146 PMCID: PMC8571071 DOI: 10.1016/j.biopsych.2021.07.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 07/12/2021] [Accepted: 07/12/2021] [Indexed: 01/23/2023]
Abstract
BACKGROUND CNIH3 is an AMPA receptor (AMPAR) auxiliary protein prominently expressed in the dorsal hippocampus (dHPC), a region that plays a critical role in spatial memory and synaptic plasticity. However, the effects of CNIH3 on AMPAR-dependent synaptic function and behavior have not been investigated. METHODS We assessed a gain-of-function model of Cnih3 overexpression in the dHPC and generated and characterized a line of Cnih3-/- C57BL/6 mice. We assessed spatial memory through behavioral assays, protein levels of AMPAR subunits and synaptic proteins by immunoblotting, and long-term potentiation in electrophysiological recordings. We also utilized a super-resolution imaging workflow, SEQUIN (Synaptic Evaluation and Quantification by Imaging of Nanostructure), for analysis of nanoscale synaptic connectivity in the dHPC. RESULTS Overexpression of Cnih3 in the dHPC improved short-term spatial memory in female mice but not in male mice. Cnih3-/- female mice exhibited weakened short-term spatial memory, reduced dHPC synapse density, enhanced expression of calcium-impermeable AMPAR (GluA2-containing) subunits in synaptosomes, and attenuated long-term potentiation maintenance compared with Cnih3+/+ control mice; Cnih3-/- males were unaffected. Further investigation revealed that deficiencies in spatial memory and changes in AMPAR composition and synaptic plasticity were most pronounced during the metestrus phase of the estrous cycle in female Cnih3-/- mice. CONCLUSIONS This study identified a novel effect of sex and estrous on CNIH3's role in spatial memory and synaptic plasticity. Manipulation of CNIH3 unmasked sexually dimorphic effects on spatial memory, synaptic function, AMPAR composition, and hippocampal plasticity. These findings reinforce the importance of considering sex as a biological variable in studies of memory and hippocampal synaptic function.
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Affiliation(s)
- Hannah E Frye
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri; Pain Center, Washington University School of Medicine, St. Louis, Missouri; Program in Neuroscience, Washington University in St. Louis, St. Louis, Missouri
| | - Yukitoshi Izumi
- Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri; Department of Neuroscience, Washington University School of Medicine, St. Louis, Missouri; Taylor Family Institute for Innovative Psychiatric Research, Washington University School of Medicine, St. Louis, Missouri
| | - Alexis N Harris
- Department of Genetics, Washington University School of Medicine, St. Louis, Missouri
| | - Sidney B Williams
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri; Pain Center, Washington University School of Medicine, St. Louis, Missouri
| | - Christopher R Trousdale
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri; Pain Center, Washington University School of Medicine, St. Louis, Missouri
| | - Min-Yu Sun
- Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri
| | - Andrew D Sauerbeck
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri
| | - Terrance T Kummer
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri
| | - Steven Mennerick
- Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri; Department of Neuroscience, Washington University School of Medicine, St. Louis, Missouri; Taylor Family Institute for Innovative Psychiatric Research, Washington University School of Medicine, St. Louis, Missouri
| | - Charles F Zorumski
- Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri; Department of Neuroscience, Washington University School of Medicine, St. Louis, Missouri; Taylor Family Institute for Innovative Psychiatric Research, Washington University School of Medicine, St. Louis, Missouri
| | - Elliot C Nelson
- Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri
| | - Joseph D Dougherty
- Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri; Department of Genetics, Washington University School of Medicine, St. Louis, Missouri
| | - Jose A Morón
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri; Pain Center, Washington University School of Medicine, St. Louis, Missouri; Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri; Department of Neuroscience, Washington University School of Medicine, St. Louis, Missouri.
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16
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Zhang H, Ben Zablah Y, Zhang H, Jia Z. Rho Signaling in Synaptic Plasticity, Memory, and Brain Disorders. Front Cell Dev Biol 2021; 9:729076. [PMID: 34671600 PMCID: PMC8520953 DOI: 10.3389/fcell.2021.729076] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 09/03/2021] [Indexed: 12/12/2022] Open
Abstract
Memory impairments are associated with many brain disorders such as autism, Alzheimer's disease, and depression. Forming memories involves modifications of synaptic transmission and spine morphology. The Rho family small GTPases are key regulators of synaptic plasticity by affecting various downstream molecules to remodel the actin cytoskeleton. In this paper, we will review recent studies on the roles of Rho proteins in the regulation of hippocampal long-term potentiation (LTP) and long-term depression (LTD), the most extensively studied forms of synaptic plasticity widely regarded as cellular mechanisms for learning and memory. We will also discuss the involvement of Rho signaling in spine morphology, the structural basis of synaptic plasticity and memory formation. Finally, we will review the association between brain disorders and abnormalities of Rho function. It is expected that studying Rho signaling at the synapse will contribute to the understanding of how memory is formed and disrupted in diseases.
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Affiliation(s)
- Haorui Zhang
- Program in Neurosciences and Mental Health, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, Toronto, ON, Canada
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Youssif Ben Zablah
- Program in Neurosciences and Mental Health, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, Toronto, ON, Canada
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Haiwang Zhang
- Program in Neurosciences and Mental Health, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, Toronto, ON, Canada
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Zhengping Jia
- Program in Neurosciences and Mental Health, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, Toronto, ON, Canada
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
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17
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Kou X, Xian J, Huang Z, Tao Y, Lin Y, Qin C, Wu H, Chang L, Luo C, Zhu D. Disrupting the Interaction of nNOS with CAPON Prevents the Reinstatement of Morphine Conditioned Place Preference. Cereb Cortex 2021; 32:569-582. [PMID: 34297798 DOI: 10.1093/cercor/bhab234] [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: 02/08/2021] [Revised: 06/19/2021] [Accepted: 06/21/2021] [Indexed: 11/12/2022] Open
Abstract
Drug abuse is a dramatic challenge for the whole society because of high relapse rate. Environmental cues are crucial for the preference memory of drug abuse. Extinction therapy has been developed to inhibit the motivational effect of drug cues to prevent the reinstatement of morphine abuse. However, extinction therapy alone only forms a new kind of unstable inhibitory memory. We found that morphine conditioned place preference (CPP) extinction training increased the association of nitric oxide synthase (nNOS) with its carboxy-terminal PDZ ligand (CAPON) in the dorsal hippocampus (dHPC) significantly and blocking the morphine-induced nNOS-CAPON association using Tat-CAPON-12C during and after extinction training reversed morphine-induced hippocampal neuroplasticity defect and prevented the reinstatement and spontaneous recovery of morphine CPP. Moreover, in the hippocampal selective ERK2 knock-out or nNOS knockout mice, the effect of Tat-CAPON-12C on the reinstatement of morphine CPP and hippocampal neuroplasticity disappeared, suggesting ERK2 is necessary for the effects of Tat-CAPON-12C. Together, our findings suggest that nNOS-CAPON interaction in the dHPC may affect the consolidation of morphine CPP extinction and dissociating nNOS-CAPON prevents the reinstatement and spontaneous recovery of morphine CPP, possibly through ERK2-mediated neuroplasticity and extinction memory consolidation, offering a new target to prevent the reinstatement of drug abuse.
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Affiliation(s)
- Xiaolin Kou
- Department of Pharmacology, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China.,Jiangsu Simovay Pharmaceutical Co., Ltd., Nanjing 210042, China
| | - Jiayun Xian
- Department of Pharmacology, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Zhenquan Huang
- Department of Pharmacology, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Yan Tao
- Department of Pharmacology, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Yuhui Lin
- Department of Pharmacology, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Cheng Qin
- Department of Pharmacology, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Haiyin Wu
- Department of Pharmacology, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Lei Chang
- Department of Pharmacology, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Chunxia Luo
- Department of Pharmacology, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Dongya Zhu
- Department of Pharmacology, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China.,Institution of Stem Cells and Neuroregeneration, Nanjing Medical University, Nanjing 211166, China.,Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangzhou 510507, China
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18
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Uncovering the analgesic effects of a pH-dependent mu-opioid receptor agonist using a model of nonevoked ongoing pain. Pain 2021; 161:2798-2804. [PMID: 32639370 DOI: 10.1097/j.pain.0000000000001968] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Currently, opioids targeting mu-opioid receptors are the most potent drugs for acute and cancer pain. However, opioids produce adverse side effects such as constipation, respiratory depression, or addiction potential. We recently developed (±)-N-(3-fluoro-1-phenethylpiperidine-4-yl)-N-phenyl propionamide (NFEPP), a compound that does not evoke central or intestinal side effects due to its selective activation of mu-opioid receptors at low pH in peripheral injured tissues. Although we demonstrated that NFEPP effectively abolishes injury-induced pain, hyperalgesia, and allodynia in rodents, the efficacy of NFEPP in nonevoked ongoing pain remains to be established. Here, we examined reward, locomotor activity, and defecation in rats with complete Freund's adjuvant-induced paw inflammation to compare fentanyl's and NFEPP's potentials to induce side effects and to inhibit spontaneous pain. We demonstrate that low, but not higher, doses of NFEPP produce conditioned place preference but not constipation or motor disturbance, in contrast to fentanyl. Using a peripherally restricted antagonist, we provide evidence that NFEPP-induced place preference is mediated by peripheral opioid receptors. Our results indicate that a low dose of NFEPP produces reward by abolishing spontaneous inflammatory pain.
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19
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Nazari-Serenjeh F, Zarrabian S, Azizbeigi R, Haghparast A. Effects of dopamine D1- and D2-like receptors in the CA1 region of the hippocampus on expression and extinction of morphine-induced conditioned place preference in rats. Behav Brain Res 2020; 397:112924. [PMID: 32976861 DOI: 10.1016/j.bbr.2020.112924] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 08/22/2020] [Accepted: 09/17/2020] [Indexed: 12/31/2022]
Abstract
Considering the extent of drug use and its relapse rate worldwide, in the present study, we explored the role of intra-CA1 administration of D1-like and D2-like receptor antagonists on the expression and extinction of morphine-induced CPP. To induce morphine CPP, adult male Wistar rats received a daily subcutaneous injection of morphine (5 mg/kg) during a 3-day conditioning phase. Different doses of SCH23390 (0.25, 1 or 4 μg/0.5 μl saline), as a selective D1-like receptor antagonist, and sulpiride (0.25, 1, or 4 μg/0.5 μl DMSO), as a selective D2-like receptor antagonist, were bilaterally microinjected into the CA1 region in the expression and extinction phases 1 h before CPP evaluation. Conditioning scores and locomotor activities were recorded during the tests. Results indicated that the injection of the antagonists into the CA1 region dose-dependently attenuated the expression of the morphine-induced CPP and sulpiride revealed prominent behavioral results compared to SCH23390 in the expression phases. Furthermore, microinjections of SCH23390 and sulpiride shortened the extinction phase of the morphine-induced CPP without changing the locomotor activity. The results indicated the involvement of D1- and D2-like receptors within the CA1 region in the expression and extinction of rewarding properties of morphine.
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Affiliation(s)
| | - Shahram Zarrabian
- Cognitive and Neuroscience Research Center (CNRC), Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Ronak Azizbeigi
- Department of Physiology, Faculty of Veterinary Medicine, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran
| | - Abbas Haghparast
- Neuroscience Research Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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20
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Nam MH, Han KS, Lee J, Won W, Koh W, Bae JY, Woo J, Kim J, Kwong E, Choi TY, Chun H, Lee SE, Kim SB, Park KD, Choi SY, Bae YC, Lee CJ. Activation of Astrocytic μ-Opioid Receptor Causes Conditioned Place Preference. Cell Rep 2020; 28:1154-1166.e5. [PMID: 31365861 DOI: 10.1016/j.celrep.2019.06.071] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 05/22/2019] [Accepted: 06/20/2019] [Indexed: 11/19/2022] Open
Abstract
The underlying mechanisms of how positive emotional valence (e.g., pleasure) causes preference of an associated context is poorly understood. Here, we show that activation of astrocytic μ-opioid receptor (MOR) drives conditioned place preference (CPP) by means of specific modulation of astrocytic MOR, an exemplar endogenous Gi protein-coupled receptor (Gi-GPCR), in the CA1 hippocampus. Long-term potentiation (LTP) induced by a subthreshold stimulation with the activation of astrocytic MOR at the Schaffer collateral pathway accounts for the memory acquisition to induce CPP. This astrocytic MOR-mediated LTP induction is dependent on astrocytic glutamate released upon activation of the astrocytic MOR and the consequent activation of the presynaptic mGluR1. The astrocytic MOR-dependent LTP and CPP were recapitulated by a chemogenetic activation of astrocyte-specifically expressed Gi-DREADD hM4Di. Our study reveals that the transduction of inhibitory Gi-signaling into augmented excitatory synaptic transmission through astrocytic glutamate is critical for the acquisition of contextual memory for CPP.
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MESH Headings
- Animals
- Astrocytes/metabolism
- CA1 Region, Hippocampal/metabolism
- GTP-Binding Protein alpha Subunits, Gi-Go/genetics
- GTP-Binding Protein alpha Subunits, Gi-Go/metabolism
- Memory
- Mice
- Mice, Knockout
- Receptors, Metabotropic Glutamate/genetics
- Receptors, Metabotropic Glutamate/metabolism
- Receptors, Opioid, mu/genetics
- Receptors, Opioid, mu/metabolism
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Affiliation(s)
- Min-Ho Nam
- Center for Neuroscience, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Kyung-Seok Han
- Center for Neuroscience, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; Department of Neuroscience, Division of Bio-Medical Science & Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Korea
| | - Jaekwang Lee
- Center for Neuroscience, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Woojin Won
- Center for Neuroscience, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea; Center for Cognition and Sociality, Institute for Basic Science, Daejeon 34126, Korea
| | - Wuhyun Koh
- Center for Neuroscience, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; Department of Neuroscience, Division of Bio-Medical Science & Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Korea; Center for Cognition and Sociality, Institute for Basic Science, Daejeon 34126, Korea
| | - Jin Young Bae
- Department of Anatomy and Neurobiology, School of Dentistry, Kyungpook National University, Daegu 41940, Korea
| | - Junsung Woo
- Center for Neuroscience, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; Department of Neuroscience, Division of Bio-Medical Science & Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Korea
| | - Jayoung Kim
- Center for Neuroscience, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Elliot Kwong
- Center for Neuroscience, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Tae-Yong Choi
- Department of Physiology and Dental Research Institute, Seoul National University School of Dentistry, Seoul 03080, Korea
| | - Heejung Chun
- Center for Neuroscience, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; Center for Cognition and Sociality, Institute for Basic Science, Daejeon 34126, Korea
| | - Seung Eun Lee
- Virus Facility, Research Animal Resource Center, KIST, Seoul 02792, Korea
| | - Sang-Bum Kim
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 41061, Korea
| | - Ki Duk Park
- Department of Neuroscience, Division of Bio-Medical Science & Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Korea; KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Korea; Convergence Research Center for Diagnosis, Treatment and Care System of Dementia, KIST, Seoul 02792, Korea
| | - Se-Young Choi
- Department of Physiology and Dental Research Institute, Seoul National University School of Dentistry, Seoul 03080, Korea
| | - Yong Chul Bae
- Department of Anatomy and Neurobiology, School of Dentistry, Kyungpook National University, Daegu 41940, Korea.
| | - C Justin Lee
- Center for Neuroscience, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; Department of Neuroscience, Division of Bio-Medical Science & Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Korea; Center for Cognition and Sociality, Institute for Basic Science, Daejeon 34126, Korea.
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21
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Fakira AK, Peck EG, Liu Y, Lueptow LM, Trimbake NA, Han MH, Calipari ES, Devi LA. The role of the neuropeptide PEN receptor, GPR83, in the reward pathway: Relationship to sex-differences. Neuropharmacology 2019; 157:107666. [PMID: 31199956 DOI: 10.1016/j.neuropharm.2019.107666] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 05/22/2019] [Accepted: 06/06/2019] [Indexed: 12/16/2022]
Abstract
GPR83, the receptor for the neuropeptide PEN, exhibits high expression in the nucleus accumbens of the human and rodent brain, suggesting that it plays a role in modulating the mesolimbic reward pathway. However, the cell-type specific expression of GPR83, its functional impact in the reward pathway, and in drug reward-learning has not been fully explored. Using GPR83/eGFP mice, we show high GPR83 expression on cholinergic interneurons in the nucleus accumbens and moderate expression on ventral tegmental area dopamine neurons. In GPR83 knockout mice, baseline dopamine release in the nucleus accumbens is enhanced which disrupts the ratio of tonic vs phasic release. Additionally, GPR83 knockout leads to changes in the expression of dopamine-related genes. Using the morphine conditioned place preference model, we identify sex differences in morphine reward-learning, show that GPR83 is upregulated in the nucleus accumbens following morphine conditioned place preference, and show that shRNA-mediated knockdown of GPR83 in the nucleus accumbens leads to attenuation morphine reward. Together, these findings detect GPR83 expression in the reward-pathway, and show its involvement in dopamine release and morphine reward-learning.
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Affiliation(s)
- Amanda K Fakira
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, NY, NY, USA
| | - Emily G Peck
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Yutong Liu
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, NY, NY, USA; Nash Family Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, NY, NY, USA
| | - Lindsay M Lueptow
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, NY, NY, USA
| | - Nikita A Trimbake
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, NY, NY, USA
| | - Ming-Hu Han
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, NY, NY, USA; Nash Family Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, NY, NY, USA
| | - Erin S Calipari
- Department of Pharmacology, Vanderbilt Center for Addiction Research, Vanderbilt Brain Institute, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Lakshmi A Devi
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, NY, NY, USA; Nash Family Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, NY, NY, USA.
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22
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Cai WT, Yoon HS, Lee S, Kim JH. Repeated exposure to methiopropamine increases dendritic spine density in the rat nucleus accumbens core. Neurochem Int 2019; 129:104487. [PMID: 31176680 DOI: 10.1016/j.neuint.2019.104487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 05/25/2019] [Accepted: 06/06/2019] [Indexed: 10/26/2022]
Abstract
Repeated exposure to classical psychomotor stimulants, like amphetamine (AMPH), produces locomotor sensitization and accompanied structural plasticity of dendritic spines in the nucleus accumbens (NAcc). Following our previous report that repeated administration of methiopropamine (MPA), a structural analog to meth-AMPH, produces locomotor sensitization, it was examined in the present study whether this behavioral change also accompanies with structural plasticity in the NAcc in a similar way to AMPH. A week after adeno-associated viral vectors containing enhanced green fluorescent protein (eGFP) were microinjected into the NAcc core, rats were repeatedly injected with saline, AMPH (1 mg/kg, IP), or MPA (5 mg/kg, IP) once every 2-3 days for a total of 4 times. Two weeks after last injection, all rats were perfused and their brains were processed for immunohistochemical staining. The image stacks for dendrite segments of medium spiny neuronal cells in the NAcc core were obtained and dendritic spines were quantitatively analyzed. Interestingly, it was found that the number of total spine density, with thin spine as a major contributor, was significantly increased in MPA compared to saline pre-exposed group, in a similar way to AMPH. These results indicate that MPA, a novel psychoactive substance, has similar characteristics with AMPH in that they both produce structural as well as behavioral changes, further supporting MPA's dependence and abuse potential.
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Affiliation(s)
- Wen Ting Cai
- Department of Physiology, Brain Korea 21 Plus Project for Medical Science, Brain Research Institute, Yonsei University College of Medicine, Seoul, 03722, South Korea
| | - Hyung Shin Yoon
- Department of Physiology, Brain Korea 21 Plus Project for Medical Science, Brain Research Institute, Yonsei University College of Medicine, Seoul, 03722, South Korea
| | - Sooyeun Lee
- College of Pharmacy, Keimyung University, Daegu, 42601, South Korea
| | - Jeong-Hoon Kim
- Department of Physiology, Brain Korea 21 Plus Project for Medical Science, Brain Research Institute, Yonsei University College of Medicine, Seoul, 03722, South Korea.
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23
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Formation of a morphine-conditioned place preference does not change the size of evoked potentials in the ventral hippocampus-nucleus accumbens projection. Sci Rep 2019; 9:5206. [PMID: 30914714 PMCID: PMC6435809 DOI: 10.1038/s41598-019-41568-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 02/27/2019] [Indexed: 12/26/2022] Open
Abstract
In opioid addiction, cues and contexts associated with drug reward can be powerful triggers for drug craving and relapse. The synapses linking ventral hippocampal outputs to medium spiny neurons of the accumbens may be key sites for the formation and storage of associations between place or context and reward, both drug-related and natural. To assess this, we implanted rats with electrodes in the accumbens shell to record synaptic potentials evoked by electrical stimulation of the ventral hippocampus, as well as continuous local-field-potential activity. Rats then underwent morphine-induced (10 mg/kg) conditioned-place-preference training, followed by extinction. Morphine caused an acute increase in the slope and amplitude of accumbens evoked responses, but no long-term changes were evident after conditioning or extinction of the place preference, suggesting that the formation of this type of memory does not lead to a net change in synaptic strength in the ventral hippocampal output to the accumbens. However, analysis of the local field potential revealed a marked sensitization of theta- and high-gamma-frequency activity with repeated morphine administration. This phenomenon may be linked to the behavioral changes—such as psychomotor sensitization and the development of drug craving—that are associated with chronic use of addictive drugs.
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24
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Cahill ME, Browne CJ, Wang J, Hamilton PJ, Dong Y, Nestler EJ. Withdrawal from repeated morphine administration augments expression of the RhoA network in the nucleus accumbens to control synaptic structure. J Neurochem 2018; 147:84-98. [PMID: 30071134 DOI: 10.1111/jnc.14563] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 07/26/2018] [Accepted: 07/27/2018] [Indexed: 12/18/2022]
Abstract
The nucleus accumbens (NAc) is a critical brain reward region that mediates the rewarding effects of drugs of abuse, including those of morphine and other opiates. Drugs of abuse induce widespread alterations in gene transcription and dendritic spine morphology in medium spiny neurons (MSNs) of the NAc that ultimately influence NAc excitability and hence reward-related behavioral responses. Growing evidence indicates that within the NAc small GTPases are common intracellular targets of drugs of abuse where these molecules regulate drug-mediated transcriptional and spine morphogenic effects. The RhoA small GTPase is among the most well-characterized members of the Ras superfamily of small GTPases, and recent work highlights an important role for hippocampal RhoA in morphine-facilitated reward behavior. Despite this, it remains unclear how RhoA pathway signaling in the NAc is affected by withdrawal from morphine. To investigate this question, using subcellular fractionation and subsequent protein profiling we examined the expression of key components of the RhoA pathway in NAc nuclear, cytoplasmic, and synaptosomal compartments during multiple withdrawal periods from repeated morphine administration. Furthermore, using in vivo viral-mediated gene transfer, we determined the consequences of revealed RhoA pathway alterations on NAc MSN dendritic spine morphology. Our findings reveal an important role for RhoA signaling cascades in mediating the effects of long-term morphine withdrawal on NAc MSN dendritic spine elimination. OPEN PRACTICES Open Science: This manuscript was awarded with the Open Materials Badge. For more information see: https://cos.io/our-services/open-science-badges/.
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Affiliation(s)
- Michael E Cahill
- Fishberg Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Caleb J Browne
- Fishberg Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Junshi Wang
- Department of Neuroscience, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Peter J Hamilton
- Fishberg Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Yan Dong
- Department of Neuroscience, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Eric J Nestler
- Fishberg Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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