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Neel AI, Wang Y, Sun H, Liontis KE, McCormack MC, Mayer JC, Cervera Juanes RP, Davenport AT, Grant KA, Daunais JD, Chen R. Differential regulation of G protein-coupled receptor-associated proteins in the caudate and the putamen of cynomolgus macaques following chronic ethanol drinking. J Neurochem 2024. [PMID: 38783749 DOI: 10.1111/jnc.16134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 04/16/2024] [Accepted: 05/08/2024] [Indexed: 05/25/2024]
Abstract
The dorsal striatum is composed of the caudate nucleus and the putamen in human and non-human primates. These two regions receive different cortical projections and are functionally distinct. The caudate is involved in the control of goal-directed behaviors, while the putamen is implicated in habit learning and formation. Previous reports indicate that ethanol differentially influences neurotransmission in these two regions. Because neurotransmitters primarily signal through G protein-coupled receptors (GPCRs) to modulate neuronal activity, the present study aimed to determine whether ethanol had a region-dependent impact on the expression of proteins that are involved in the trafficking and function of GPCRs, including G protein subunits and their effectors, protein kinases, and elements of the cytoskeleton. Western blotting was performed to examine protein levels in the caudate and the putamen of male cynomolgus macaques that self-administered ethanol for 1 year under free access conditions, along with control animals that self-administered an isocaloric sweetened solution under identical operant conditions. Among the 18 proteins studied, we found that the levels of one protein (PKCβ) were increased, and 13 proteins (Gαi1/3, Gαi2, Gαo, Gβ1γ, PKCα, PKCε, CaMKII, GSK3β, β-actin, cofilin, α-tubulin, and tubulin polymerization promoting protein) were reduced in the caudate of alcohol-drinking macaques. However, ethanol did not alter the expression of any proteins examined in the putamen. These observations underscore the unique vulnerability of the caudate nucleus to changes in protein expression induced by chronic ethanol exposure. Whether these alterations are associated with ethanol-induced dysregulation of GPCR function and neurotransmission warrants future investigation.
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Affiliation(s)
- Anna I Neel
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Yutong Wang
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Haiguo Sun
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Katherine E Liontis
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Mary C McCormack
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Jonathan C Mayer
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Rita P Cervera Juanes
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - April T Davenport
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Kathleen A Grant
- Division of Neuroscience Oregon National Primate Research Center, Oregon Health & Science University, Portland, Oregon, USA
| | - James D Daunais
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Rong Chen
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
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Oka M, Yoshino R, Kitanaka N, Hall FS, Uhl GR, Kitanaka J. Role of glycogen synthase kinase-3β in dependence and abuse liability of alcohol. Alcohol Alcohol 2024; 59:agad086. [PMID: 38145944 DOI: 10.1093/alcalc/agad086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 11/25/2023] [Accepted: 11/28/2023] [Indexed: 12/27/2023] Open
Abstract
BACKGROUND Alcohol is a major abused drug worldwide that contributes substantially to health and social problems. These problems result from acute alcohol overuse as well as chronic use, leading to alcohol use disorder (AUD). A major goal of this field is to establish a treatment for alcohol abuse and dependence in patients with AUD. The central molecular mechanisms of acute alcohol actions have been extensively investigated in rodent models. AIMS One of the central mechanisms that may be involved is glycogen synthase kinase-3β (GSK-3β) activity, a key enzyme involved in glycogen metabolism but which has crucial roles in numerous cellular processes. Although the exact mechanisms leading from acute alcohol actions to these chronic changes in GSK-3β function are not yet clear, GSK-3β nonetheless constitutes a potential therapeutic target for AUD by reducing its function using GSK-3β inhibitors. This review is focused on the correlation between GSK-3β activity and the degree of alcohol consumption. METHODS Research articles regarding investigation of effect of GSK-3β on alcohol consumption in rodents were searched on PubMed, Embase, and Scopus databases using keywords "glycogen synthase kinase," "alcohol (or ethanol)," "intake (or consumption)," and evaluated by changes in ratios of pGSK-3βSer9/pGSK-3β. RESULTS In animal experiments, GSK-3β activity decreases in the brain under forced and voluntary alcohol consumption while GSK-3β activity increases under alcohol-seeking behavior. CONCLUSIONS Several pieces of evidence suggest that alterations in GSK-3β function are important mediators of chronic ethanol actions, including those related to alcohol dependence and the adverse effects of chronic ethanol exposure.
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Affiliation(s)
- Masahiro Oka
- Laboratory of Drug Addiction and Experimental Therapeutics, Department of Pharmacy, School of Pharmacy, Hyogo Medical University, 1-3-6 Minatojima, Chuo-ku, Kobe, Hyogo 650-8530, Japan
| | - Rui Yoshino
- Laboratory of Drug Addiction and Experimental Therapeutics, Department of Pharmacy, School of Pharmacy, Hyogo Medical University, 1-3-6 Minatojima, Chuo-ku, Kobe, Hyogo 650-8530, Japan
| | - Nobue Kitanaka
- Department of Pharmacology, School of Medicine, Hyogo Medical University, Nishinomiya, Hyogo 663-8501, Japan
| | - F Scott Hall
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Frederic and Mary Wolfe Center HEB 282D, Mail Stop 1015, 3000 Arlington Avenue,Toledo, OH 43614, United States
| | - George R Uhl
- Neurology Service, VA Maryland Healthcare System, 10 North Greene Street, Baltimore, MD 21201, United States
- Departments of Neurology and Pharmacology, University of Maryland School of Medicine, 655 W. Baltimore Street, Baltimore, MD 21201, United States
| | - Junichi Kitanaka
- Laboratory of Drug Addiction and Experimental Therapeutics, Department of Pharmacy, School of Pharmacy, Hyogo Medical University, 1-3-6 Minatojima, Chuo-ku, Kobe, Hyogo 650-8530, Japan
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Sun Y, Jiang H, Pan L, Han Y, Chen Y, Jiang Y, Wang Y. LncRNA OIP5-AS1/miR-410-3p/Wnt7b axis promotes the proliferation of rheumatoid arthritis fibroblast-like synoviocytes via regulating the Wnt/β-catenin pathway. Autoimmunity 2023; 56:2189136. [PMID: 36942896 DOI: 10.1080/08916934.2023.2189136] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
LncRNA OIP5-AS1 has a common gene imbalance in various cancers and tumours, which plays an important role in regulating its biological function. However, there are few studies on lncRNA OIP5-AS1 in rheumatoid arthritis (RA). The purpose of the present study was to investigate the role of lncRNA OIP5-AS1 in the pathogenesis of RA. In the present study, we established an adjuvant arthritis (AA) rat model to obtain primary fibroblast-like synoviocytes (FLSs);The subcellular localisation of lncRNA OIP5-AS1 was detected by fluorescence in situ hybridisation (FISH) assay; Cell proliferation of FLSs was determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT) assay;IL-1β, IL-6 and TNF-α concentrations were measured by enzyme-linked immunosorbent assay (ELISA);Quantitative real-time PCR (qRT-PCR), Western blots(WB) and immunofluorescence were used to detect the expression of lncRNA OIP5-AS1/miR-410-3p/wnt7b signal axis and Wnt/β-catenin signal pathway related indicators in FLSs. FISH assay confirmed the presence of lncRNA OIP5-AS1 in the cytoplasm, suggesting that it acts as a competing endogenous RNA (ceRNA). qRT-PCR showed that the expression of lncRNA OIP5-AS1 was upregulated in FLSs, while the expression of miR-410-3p was downregulated in FLSs. We also found that lncRNA OIP5-AS1 knockdown inhibited the proliferation and inflammation of FLSs. Moreover, the expression of Wnt7b, the downstream target gene of miR-410-3p, and the activation of the Wnt/β-catenin signalling pathway were also inhibited by lncRNA OIP5-AS1 knockdown. These results suggested that lncRNA OIP5-AS1 promotes the activation of the Wnt/β-catenin signalling pathway by regulating the miR-410-3p/Wnt7b signalling axis, thereby participating in the occurrence and development of RA.
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Affiliation(s)
- Yuan Sun
- Pharmacy Department, The First Affiliated Hospital of Anhui University of Traditional Chinese Medicine, Hefei, Anhui, P.R. China
- School of Pharmacy, Anhui University of Traditional Chinese Medicine, Hefei, Anhui, P.R. China
- Pharmacy Department, ShangHai East Hospital, Shanghai, P.R. China
| | - Hui Jiang
- Pharmacy Department, The First Affiliated Hospital of Anhui University of Traditional Chinese Medicine, Hefei, Anhui, P.R. China
| | - LingYu Pan
- Pharmacy Department, The First Affiliated Hospital of Anhui University of Traditional Chinese Medicine, Hefei, Anhui, P.R. China
| | - YanQuan Han
- Pharmacy Department, The First Affiliated Hospital of Anhui University of Traditional Chinese Medicine, Hefei, Anhui, P.R. China
| | - Yan Chen
- School of Pharmacy, Anhui University of Traditional Chinese Medicine, Hefei, Anhui, P.R. China
| | - Yeke Jiang
- School of Pharmacy, Anhui University of Traditional Chinese Medicine, Hefei, Anhui, P.R. China
| | - Yongzhong Wang
- Pharmacy Department, The First Affiliated Hospital of Anhui University of Traditional Chinese Medicine, Hefei, Anhui, P.R. China
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Hoffman JL, Faccidomo SP, Taylor SM, DeMiceli KG, May AM, Smith EN, Whindleton CM, Hodge CW. Negative modulation of AMPA receptors bound to transmembrane AMPA receptor regulatory protein γ-8 blunts the positive reinforcing properties of alcohol and sucrose in a brain region-dependent manner in male mice. Psychopharmacology (Berl) 2023; 240:1261-1273. [PMID: 37055596 PMCID: PMC10698495 DOI: 10.1007/s00213-023-06365-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: 12/12/2022] [Accepted: 04/06/2023] [Indexed: 04/15/2023]
Abstract
RATIONALE The development and progression of alcohol use disorder (AUD) are widely viewed as maladaptive neuroplasticity. The transmembrane alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptor (AMPAR) regulatory protein γ8 (TARP γ-8) is a molecular mechanism of neuroplasticity that has not been evaluated in AUD or other addictions. OBJECTIVE To address this gap in knowledge, we evaluated the mechanistic role of TARP γ-8 bound AMPAR activity in the basolateral amygdala (BLA) and ventral hippocampus (vHPC) in the positive reinforcing effects of alcohol, which drive repetitive alcohol use throughout the course of AUD, in male C57BL/6 J mice. These brain regions were selected because they exhibit high levels of TARP γ-8 expression and send glutamate projections to the nucleus accumbens (NAc), which is a key nucleus in the brain reward pathway. METHODS AND RESULTS Site-specific pharmacological inhibition of AMPARs bound to TARP γ-8 in the BLA via bilateral infusion of the selective negative modulator JNJ-55511118 (0-2 µg/µl/side) significantly decreased operant alcohol self-administration with no effect on sucrose self-administration in behavior-matched controls. Temporal analysis showed that reductions in alcohol-reinforced response rate occurred > 25 min after the onset of responding, consistent with a blunting of the positive reinforcing effects of alcohol in the absence of nonspecific behavioral effects. In contrast, inhibition of TARP γ-8 bound AMPARs in the vHPC selectively decreased sucrose self-administration with no effect on alcohol. CONCLUSIONS This study reveals a novel brain region-specific role of TARP γ-8 bound AMPARs as a molecular mechanism of the positive reinforcing effects of alcohol and non-drug rewards.
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Affiliation(s)
- Jessica L Hoffman
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Thurston-Bowles Building, CB#7178, Chapel Hill, NC, 27599, USA
| | - Sara P Faccidomo
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Thurston-Bowles Building, CB#7178, Chapel Hill, NC, 27599, USA
- Department of Psychiatry, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Seth M Taylor
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Thurston-Bowles Building, CB#7178, Chapel Hill, NC, 27599, USA
| | - Kristina G DeMiceli
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Thurston-Bowles Building, CB#7178, Chapel Hill, NC, 27599, USA
| | - Ashley M May
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Thurston-Bowles Building, CB#7178, Chapel Hill, NC, 27599, USA
| | - Evan N Smith
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Thurston-Bowles Building, CB#7178, Chapel Hill, NC, 27599, USA
| | - Ciarra M Whindleton
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Thurston-Bowles Building, CB#7178, Chapel Hill, NC, 27599, USA
| | - Clyde W Hodge
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Thurston-Bowles Building, CB#7178, Chapel Hill, NC, 27599, USA.
- Department of Psychiatry, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
- Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
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Total Saponins of Radix Clematis Regulate Fibroblast-Like Synoviocyte Proliferation in Rheumatoid Arthritis via the LncRNA OIP5-AS1/MiR-410-3p/Wnt7b Signaling Pathway. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:8393949. [PMID: 35668775 PMCID: PMC9166986 DOI: 10.1155/2022/8393949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Revised: 04/20/2022] [Accepted: 05/09/2022] [Indexed: 11/17/2022]
Abstract
Background Rheumatoid arthritis (RA) is the most common autoimmune disease and affects multiple joints. Previous studies have shown that total saponins of Radix clematidis (TSC) have a clear therapeutic effect on RA, but the specific mechanism has not yet been clarified. Literature screening and previous research suggest that the lncRNA OIP5-AS1/miR-410-3p/Wnt7b signaling pathway exerts a regulatory effect on the pathogenesis of RA. In this study, we examined whether the TSC treatment of RA affects the lncRNA OIP5-AS1/miR-410-3p/Wnt7b pathway. Materials and Methods Freund's complete adjuvant was used to create an adjuvant arthritis (AA) rat model with rat synovial cells being harvested and cultured. The experiment comprises a normal group, model group, TSC optimal-dose group, TSC optimal-dose group + lncRNA OIP5-AS1siRNA group, lncRNA OIP5-AS1 siRNA group, and lncRNA OIP5-AS1 siRNA + NC group. MMT was used to screen the optimal concentration of TSC. The level of lncRNA OIP5-AS1, miR-410-3p, Wnt7b, β-catenin, c-Myc, cyclin D1, GSK-3β, and SFRP4 mRNA were detected by real-time-qPCR, the expression of Wnt7b, β-catenin, c-Myc, cyclin D1, GSK-3β, and p-GSK-3β (Ser9) protein were detected by immunofluorescence and Western blot. Results We found that TSC inhibits the proliferation of RA FLS, TSC significantly reduced lncRNA OIP5-AS1, Wnt7b, β-catenin, c-Myc, cyclin D1, and p-GSK-3β/GSK-3β mRNA/protein expression, whereas the miR-410-3p and SFRP4 mRNA/protein expression levels were significantly upregulated. Our data suggest that TSC can inhibit the excessive proliferation of FLS to treat RA, the mechanism of which may be closely related to regulation of the lncRNA OIP5-AS1/miR-410-3p /Wnt7b signaling axis and the Wnt signaling pathway.
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Zhang X, Wang J, Ran R, Peng Y, Xiao Y. FSC231 alleviates paclitaxel-induced neuralgia by inhibiting the interactions between PICK1 and GluA2 and activates GSK-3β and ERK1/2. Brain Behav 2021; 11:e2380. [PMID: 34582111 PMCID: PMC8613442 DOI: 10.1002/brb3.2380] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 07/27/2021] [Accepted: 08/31/2021] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND FSC231, a PSD-95/DLG/ZO-1 (PDZ) domain inhibitor of protein kinase Cα interacting protein 1 (PICK1), has analgesic effects, but the mechanism remains unclear. METHODS The expression level of PICK1 in dorsal root ganglion (DRG) of rats was changed by vector plasmid, and the effect of PICK1 on paclitaxel (PTL)-induced neuralgia of rats was observed in collaboration with FSC231 treatment. The possible molecular mechanisms were explored by quantitative real-time polymerase chain reaction (qRT-PCR), Western Blot and co-immunoprecipitation (Co-IP) techniques. RESULTS PTL treatment can significantly reduce mechanical withdrawal threshold (MWT), shorten thermal withdrawal latency (TWL), promote DRG inflammation and release of substance P (SP), stimulate PICK1 expression, decrease α-amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid receptor 2 (AMPAR, GluA2) level and increase glycogen synthase kinase-3β (GSK-3β) and extracellular regulated protein kinases1/2 (ERK1/2) phosphorylation in rats, while FSC231 treatment can alleviate the above effects induced by PTL. Overexpression of PICK1 can counteract reduced PICK1 level, increased GluA2 level and decreased GSK-3β and ERK1/2 phosphorylation levels caused by FSC231 treatment. The results of Co-IP confirmed the interactions between PICK1 and GluA2. Both FSC231 treatment and silent PICK1 improved PTL-induced MWT reduction, TWL shortening, inflammation, SP release and related gene expression changes, with cumulative effect. CONCLUSION FSC231 activates GSK-3β/ERK1/2 by inhibiting the interaction between PICK1 and GluA2 and alleviates PTL-induced DRG neuralgia in rats.
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Affiliation(s)
- Xi Zhang
- Department of Anesthesiology, Renmin Hospital, Hubei University of Medicine, Shiyan, P. R. China
| | - Jiagao Wang
- Department of Anesthesiology, Renmin Hospital, Hubei University of Medicine, Shiyan, P. R. China
| | - Ran Ran
- Department of Anesthesiology, Renmin Hospital, Hubei University of Medicine, Shiyan, P. R. China
| | - Yuchuan Peng
- Department of Anesthesiology, Renmin Hospital, Hubei University of Medicine, Shiyan, P. R. China
| | - Yun Xiao
- Department of Anesthesiology, Renmin Hospital, Hubei University of Medicine, Shiyan, P. R. China
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Faccidomo S, Cogan ES, Hon OJ, Hoffman JL, Saunders BL, Eastman VR, Kim M, Taylor SM, McElligott ZA, Hodge CW. Calcium-permeable AMPA receptor activity and GluA1 trafficking in the basolateral amygdala regulate operant alcohol self-administration. Addict Biol 2021; 26:e13049. [PMID: 33955100 DOI: 10.1111/adb.13049] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 04/16/2021] [Indexed: 12/22/2022]
Abstract
Addiction is viewed as maladaptive glutamate-mediated neuroplasticity that is regulated, in part, by calcium-permeable AMPA receptor (CP-AMPAR) activity. However, the contribution of CP-AMPARs to alcohol-seeking behavior remains to be elucidated. We evaluated CP-AMPAR activity in the basolateral amygdala (BLA) as a potential target of alcohol that also regulates alcohol self-administration in C57BL/6J mice. Operant self-administration of sweetened alcohol increased spontaneous EPSC frequency in BLA neurons that project to the nucleus accumbens as compared with behavior-matched sucrose controls indicating an alcohol-specific upregulation of synaptic activity. Bath application of the CP-AMPAR antagonist NASPM decreased evoked EPSC amplitude only in alcohol self-administering mice indicating alcohol-induced synaptic insertion of CP-AMPARs in BLA projection neurons. Moreover, NASPM infusion in the BLA dose-dependently decreased the rate of operant alcohol self-administration providing direct evidence for CP-AMPAR regulation of alcohol reinforcement. As most CP-AMPARs are GluA1-containing, we asked if alcohol alters the activation state of GluA1-containing AMPARs. Immunocytochemistry results showed elevated GluA1-S831 phosphorylation in the BLA of alcohol as compared with sucrose mice. To investigate mechanistic regulation of alcohol self-administration by GluA1-containing AMPARs, we evaluated the necessity of GluA1 trafficking using a TET-ON AAV encoding a dominant-negative GluA1 c-terminus (GluA1ct) that blocks activity-dependent synaptic delivery of native GluA1-containing AMPARs. GluA1ct expression in the BLA reduced alcohol self-administration with no effect on sucrose controls. These results show that CP-AMPAR activity and GluA1 trafficking in the BLA mechanistically regulate the reinforcing effects of sweetened alcohol. Pharmacotherapeutic targeting these mechanisms of maladaptive neuroplasticity may aid medical management of alcohol use disorder.
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Affiliation(s)
- Sara Faccidomo
- Bowles Center for Alcohol Studies The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
- Department of Psychiatry The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
| | - Elizabeth S. Cogan
- Bowles Center for Alcohol Studies The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
| | - Olivia J. Hon
- Bowles Center for Alcohol Studies The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
- Neuroscience Curriculum The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
| | - Jessica L. Hoffman
- Bowles Center for Alcohol Studies The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
| | - Briana L. Saunders
- Bowles Center for Alcohol Studies The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
| | - Vallari R. Eastman
- Bowles Center for Alcohol Studies The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
| | - Michelle Kim
- Bowles Center for Alcohol Studies The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
| | - Seth M. Taylor
- Bowles Center for Alcohol Studies The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
| | - Zoe A. McElligott
- Bowles Center for Alcohol Studies The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
- Department of Psychiatry The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
- Department of Pharmacology The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
| | - Clyde W. Hodge
- Bowles Center for Alcohol Studies The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
- Department of Psychiatry The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
- Department of Pharmacology The University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
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Hoffman JL, Faccidomo S, Saunders BL, Taylor SM, Kim M, Hodge CW. Inhibition of AMPA receptors (AMPARs) containing transmembrane AMPAR regulatory protein γ-8 with JNJ-55511118 shows preclinical efficacy in reducing chronic repetitive alcohol self-administration. Alcohol Clin Exp Res 2021; 45:1424-1435. [PMID: 34086361 DOI: 10.1111/acer.14639] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 04/27/2021] [Accepted: 05/14/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND A prominent therapeutic indication for alcohol use disorder (AUD) is reduction in chronic repetitive alcohol use. Glutamate α-Amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA) receptors (AMPARs) regulate chronic alcohol self-administration in preclinical models. Recent evidence indicates that the expression and function of AMPARs require the transmembrane AMPAR regulatory protein γ-8 (TARP γ-8). This study evaluated the preclinical efficacy of JNJ-55511118, a novel, selective, high-affinity inhibitor of TARP γ-8-bound AMPARs, in reducing chronic operant alcohol self-administration. METHODS Separate groups of male and female C57BL/6J mice (n = 8/sex/group) were trained to lever press for sweetened alcohol (9% v/v + sucrose 2% w/v) or sucrose only (2% w/v) in operant conditioning chambers using an FR-4 schedule of reinforcement. After a 40-day baseline, JNJ-55511118 (0, 1, and 10 mg/kg, p.o.) was administered in randomized order 1 h before self-administration sessions. Parameters of operant behavior including response rate, total reinforcers, and head entries in the drinking troughs were computer recorded. RESULTS During baseline, responding to alcohol, but not sucrose, was greater in female than male mice. In male mice, both doses of JNJ-55511118 decreased multiple parameters of alcohol self-administration but did not reduce behavior-matched sucrose-only self-administration. JNJ-55511118 had no effect on sweetened alcohol or sucrose self-administration in female mice. Subsequent tests of motor function showed that the lowest effective dose of JNJ-55511118 (1 mg/kg) had no effect on open-field activity in male mice. CONCLUSIONS This study shows for the first time that TARP γ-8-bound AMPARs regulate a behavioral pathology associated with addiction. The preclinical efficacy of JNJ-55511118 in reducing alcohol self-administration in male mice suggests that inhibition of TARP γ-8-bound AMPARs is a novel and highly significant neural target for developing medications to treat AUD and other forms of addiction.
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Affiliation(s)
- Jessica L Hoffman
- Bowles Center for Alcohol Studies, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Sara Faccidomo
- Bowles Center for Alcohol Studies, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,Department of Psychiatry, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Briana L Saunders
- Bowles Center for Alcohol Studies, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Seth M Taylor
- Bowles Center for Alcohol Studies, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Michelle Kim
- Bowles Center for Alcohol Studies, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Clyde W Hodge
- Bowles Center for Alcohol Studies, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,Department of Psychiatry, School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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Hoffman JL, Faccidomo S, Kim M, Taylor SM, Agoglia AE, May AM, Smith EN, Wong LC, Hodge CW. Alcohol drinking exacerbates neural and behavioral pathology in the 3xTg-AD mouse model of Alzheimer's disease. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2019; 148:169-230. [PMID: 31733664 PMCID: PMC6939615 DOI: 10.1016/bs.irn.2019.10.017] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disorder that represents the most common cause of dementia in the United States. Although the link between alcohol use and AD has been studied, preclinical research has potential to elucidate neurobiological mechanisms that underlie this interaction. This study was designed to test the hypothesis that nondependent alcohol drinking exacerbates the onset and magnitude of AD-like neural and behavioral pathology. We first evaluated the impact of voluntary 24-h, two-bottle choice home-cage alcohol drinking on the prefrontal cortex and amygdala neuroproteome in C57BL/6J mice and found a striking association between alcohol drinking and AD-like pathology. Bioinformatics identified the AD-associated proteins MAPT (Tau), amyloid beta precursor protein (APP), and presenilin-1 (PSEN-1) as the main modulators of alcohol-sensitive protein networks that included AD-related proteins that regulate energy metabolism (ATP5D, HK1, AK1, PGAM1, CKB), cytoskeletal development (BASP1, CAP1, DPYSL2 [CRMP2], ALDOA, TUBA1A, CFL2, ACTG1), cellular/oxidative stress (HSPA5, HSPA8, ENO1, ENO2), and DNA regulation (PURA, YWHAZ). To address the impact of alcohol drinking on AD, studies were conducted using 3xTg-AD mice that express human MAPT, APP, and PSEN-1 transgenes and develop AD-like brain and behavioral pathology. 3xTg-AD and wild-type mice consumed alcohol or saccharin for 4 months. Behavioral tests were administered during a 1-month alcohol-free period. Alcohol intake induced AD-like behavioral pathologies in 3xTg-AD mice including impaired spatial memory in the Morris Water Maze, diminished sensorimotor gating as measured by prepulse inhibition, and exacerbated conditioned fear. Multiplex immunoassay conducted on brain lysates showed that alcohol drinking upregulated primary markers of AD pathology in 3xTg-AD mice: Aβ 42/40 ratio in the lateral entorhinal and prefrontal cortex and total Tau expression in the lateral entorhinal cortex, medial prefrontal cortex, and amygdala at 1-month post alcohol exposure. Immunocytochemistry showed that alcohol use upregulated expression of pTau (Ser199/Ser202) in the hippocampus, which is consistent with late-stage AD. According to the NIA-AA Research Framework, these results suggest that alcohol use is associated with Alzheimer's pathology. Results also showed that alcohol use was associated with a general reduction in Akt/mTOR signaling via several phosphoproteins (IR, IRS1, IGF1R, PTEN, ERK, mTOR, p70S6K, RPS6) in multiple brain regions including hippocampus and entorhinal cortex. Dysregulation of Akt/mTOR phosphoproteins suggests alcohol may target this pathway in AD progression. These results suggest that nondependent alcohol drinking increases the onset and magnitude of AD-like neural and behavioral pathology in 3xTg-AD mice.
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Affiliation(s)
- Jessica L Hoffman
- Department of Psychiatry, Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Sara Faccidomo
- Department of Psychiatry, Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Michelle Kim
- Department of Psychiatry, Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Seth M Taylor
- Department of Psychiatry, Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Abigail E Agoglia
- Department of Psychiatry, Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Ashley M May
- Department of Psychiatry, Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Evan N Smith
- Department of Psychiatry, Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - L C Wong
- Department of Psychiatry, Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Clyde W Hodge
- Department of Psychiatry, Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.
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