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Allard RL, Mayfield J, Barchiesi R, Salem NA, Mayfield RD. Toll-like receptor 7: A novel neuroimmune target to reduce excessive alcohol consumption. Neurobiol Stress 2024; 31:100639. [PMID: 38765062 PMCID: PMC11101708 DOI: 10.1016/j.ynstr.2024.100639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/30/2024] [Accepted: 05/03/2024] [Indexed: 05/21/2024] Open
Abstract
Toll-like receptors (TLRs) are a family of innate immune receptors that recognize molecular patterns in foreign pathogens and intrinsic danger/damage signals from cells. TLR7 is a nucleic acid sensing endosomal TLR that is activated by single-stranded RNAs from microbes or by small noncoding RNAs that act as endogenous ligands. TLR7 signals through the MyD88 adaptor protein and activates the transcription factor interferon regulatory factor 7 (IRF7). TLR7 is found throughout the brain and is highly expressed in microglia, the main immune cells of the brain that have also been implicated in alcohol drinking in mice. Upregulation of TLR7 mRNA and protein has been identified in postmortem hippocampus and cortex from AUD subjects that correlated positively with lifetime consumption of alcohol. Similarly, Tlr7 and downstream signaling genes were upregulated in rat hippocampal and cortical slice cultures after chronic alcohol exposure and in these regions after chronic binge-like alcohol treatment in mice. In addition, repeated administration of the synthetic TLR7 agonists imiquimod (R837) or resiquimod (R848) increased voluntary alcohol drinking in different rodent models and produced sustained upregulation of IRF7 in the brain. These findings suggest that chronic TLR7 activation may drive excessive alcohol drinking. In the brain, this could occur through increased levels of endogenous TLR7 activators, like microRNAs and Y RNAs. This review explores chronic TLR7 activation as a pathway of dysregulated neuroimmune signaling in AUD and the endogenous small RNA ligands in the brain that could perpetuate innate immune responses and escalate alcohol drinking.
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Affiliation(s)
- Ruth L. Allard
- Waggoner Center for Alcohol and Addiction Research and The University of Texas at Austin, Austin, TX, 78712, USA
| | - Jody Mayfield
- Waggoner Center for Alcohol and Addiction Research and The University of Texas at Austin, Austin, TX, 78712, USA
| | - Riccardo Barchiesi
- Waggoner Center for Alcohol and Addiction Research and The University of Texas at Austin, Austin, TX, 78712, USA
| | - Nihal A. Salem
- Waggoner Center for Alcohol and Addiction Research and The University of Texas at Austin, Austin, TX, 78712, USA
| | - R. Dayne Mayfield
- Waggoner Center for Alcohol and Addiction Research and The University of Texas at Austin, Austin, TX, 78712, USA
- Department of Neuroscience, The University of Texas at Austin, Austin, TX, 78712, USA
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2
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Heilig M, Witkiewitz K, Ray LA, Leggio L. Novel medications for problematic alcohol use. J Clin Invest 2024; 134:e172889. [PMID: 38828724 DOI: 10.1172/jci172889] [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: 06/05/2024] Open
Abstract
Alcohol-related harm, a major cause of disease burden globally, affects people along a spectrum of use. When a harmful pattern of drinking is present in the absence of significant behavioral pathology, low-intensity brief interventions that provide information about health consequences of continued use provide large health benefits. At the other end of the spectrum, profound behavioral pathology, including continued use despite knowledge of potentially fatal consequences, warrants a medical diagnosis, and treatment is strongly indicated. Available behavioral and pharmacological treatments are supported by scientific evidence but are vastly underutilized. Discovery of additional medications, with a favorable balance of efficacy versus safety and tolerability can improve clinical uptake of treatment, allow personalized treatment, and improve outcomes. Here, we delineate the clinical conditions when pharmacotherapy should be considered in relation to the main diagnostic systems in use and discuss clinical endpoints that represent meaningful clinical benefits. We then review specific developments in three categories of targets that show promise for expanding the treatment toolkit. GPCRs remain the largest category of successful drug targets across contemporary medicine, and several GPCR targets are currently pursued for alcohol-related indications. Endocrine systems are another established category, and several promising targets have emerged for alcohol indications. Finally, immune modulators have revolutionized treatment of multiple medical conditions, and they may also hold potential to produce benefits in patients with alcohol problems.
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Affiliation(s)
- Markus Heilig
- Center for Social and Affective Neuroscience, Linköping University, and Department of Psychiatry, Linköping University Hospital, Linköping, Sweden
| | - Katie Witkiewitz
- Department of Psychology and Center on Alcohol, Substance Use and Addictions, University of New Mexico, Albuquerque, New Mexico, USA
| | - Lara A Ray
- Department of Psychology, UCLA, Los Angeles, California, USA
| | - Lorenzo Leggio
- Clinical Psychoneuroendocrinology and Neuropsychopharmacology Section, Translational Addiction Medicine Branch, National Institute on Drug Abuse Intramural Research Program and National Institute on Alcohol Abuse and Alcoholism Division of Intramural Clinical and Biological Research, NIH, Baltimore and Bethesda, Maryland, USA
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3
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Gano A, Wojcik H, Danseglio NC, Kelliher K, Varlinskaya EI, Deak T. Adolescent intermittent ethanol (AIE) sensitized fever in male Sprague Dawley rats exposed to poly I:C in adulthood. Brain Behav Immun 2024; 120:82-97. [PMID: 38777284 DOI: 10.1016/j.bbi.2024.05.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 05/13/2024] [Accepted: 05/19/2024] [Indexed: 05/25/2024] Open
Abstract
Fever plays an indispensable role in host defense processes and is used as a rapid index of infection severity. Unfortunately, there are also substantial individual differences in fever reactions with biological sex, immunological history, and other demographic variables contributing to adverse outcomes of infection. The present series of studies were designed to test the hypothesis that a history of adolescent alcohol misuse may be a latent experiential variable that determines fever severity using polyinosinic:polycytidylic acid (poly I:C), a synthetic form of double-stranded RNA that mimics a viral challenge. Adult male and female Sprague Dawley rats were injected with 0 (saline) or 4 mg/kg poly I:C to first establish sex differences in fever sensitivity in Experiment 1 using implanted radiotelemetry devices for remote tracking. In Experiments 2 and 3, adolescent males and females were exposed to either water or ethanol (0 or 4 g/kg intragastrically, 3 days on, 2 days off, ∼P30-P50, 4 cycles/12 exposures total). After a period of abstinence, adult rats (∼P80-96) were then challenged with saline or poly I:C, and fever induction and maintenance were examined across a prolonged time course of 8 h using implanted probes. In Experiments 4 and 5, adult male and female subjects with a prior history of adolescent water or adolescent intermittent ethanol (AIE) were given saline or poly I:C, with tissue collected for protein and gene expression analysis at 5 h post-injection. Initial sex differences in fever sensitivity were minimal in response to the 4 mg/kg dose of poly I:C in ethanol-naïve rats. AIE exposed males injected with poly I:C showed a sensitized fever response as well as enhanced TLR3, IκBα, and IL-1β expression in the nucleus of the solitary tract. Other brain regions related to thermoregulation and peripheral organs such as spleen, liver, and blood showed generalized immune responses to poly I:C, with no differences evident between AIE and water-exposed males. In contrast, AIE did not affect responsiveness to poly I:C in females. Thus, the present findings suggest that adolescent binge drinking may produce sex-specific and long-lasting effects on fever reactivity to viral infection, with preliminary evidence suggesting that these effects may be due to centrally-mediated changes in fever regulation rather than peripheral immunological mechanisms.
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Affiliation(s)
- Anny Gano
- Developmental Exposure Alcohol Research Center (DEARC), Behavioral Neuroscience Program, Department of Psychology, Binghamton University, Binghamton, NY, 13902-6000, USA
| | - Hannah Wojcik
- Developmental Exposure Alcohol Research Center (DEARC), Behavioral Neuroscience Program, Department of Psychology, Binghamton University, Binghamton, NY, 13902-6000, USA
| | - Nina C Danseglio
- Developmental Exposure Alcohol Research Center (DEARC), Behavioral Neuroscience Program, Department of Psychology, Binghamton University, Binghamton, NY, 13902-6000, USA
| | - Kaitlyn Kelliher
- Developmental Exposure Alcohol Research Center (DEARC), Behavioral Neuroscience Program, Department of Psychology, Binghamton University, Binghamton, NY, 13902-6000, USA
| | - Elena I Varlinskaya
- Developmental Exposure Alcohol Research Center (DEARC), Behavioral Neuroscience Program, Department of Psychology, Binghamton University, Binghamton, NY, 13902-6000, USA
| | - Terrence Deak
- Developmental Exposure Alcohol Research Center (DEARC), Behavioral Neuroscience Program, Department of Psychology, Binghamton University, Binghamton, NY, 13902-6000, USA.
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4
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Kirsch DE, Grodin EN, Nieto SJ, Kady A, Ray LA. Early life stress is associated with greater negative emotionality and peripheral inflammation in alcohol use disorder. Neuropsychopharmacology 2024:10.1038/s41386-024-01877-4. [PMID: 38740901 DOI: 10.1038/s41386-024-01877-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 04/18/2024] [Accepted: 04/23/2024] [Indexed: 05/16/2024]
Abstract
Early life stress (ELS) increases risk for psychiatric illness, including alcohol use disorder (AUD). Researchers have hypothesized that individuals with and without a history of ELS who have the same primary DSM-5 diagnosis are clinically and biologically distinct. While there is strong support for this hypothesis in the context of mood disorders, the hypothesis remains largely untested in the context of AUD. This study investigated the impact of ELS on the neuroclinical phenomenology and inflammatory profile of individuals with AUD. Treatment-seeking adults with AUD (N = 163) completed the Adverse Childhood Experiences (ACE) Questionnaire and phenotypic battery as part of a pharmacotherapy trial for AUD (NCT03594435). Participants were classified as having "no-ELS," (ACE = 0) "moderate-ELS," (ACE = 1, 2 or 3) or "high-ELS" (ACE = 4 + ). The Addictions Neuroclinical Assessment domains incentive salience and negative emotionality were derived and used to assess the neuroclinical phenomenology of AUD. We tested (1) cumulative ELS as a predictor of ANA domains and (2) ELS group differences in ANA domains. A subset of participants (N = 98) provided blood samples for a biomarker of peripheral inflammation (C-reactive protein; CRP); analyses were repeated with CRP as the outcome variable. Greater ELS predicted higher negative emotionality and elevated CRP, but not incentive salience. The high-ELS group exhibited greater negative emotionality compared with the no-ELS and moderate-ELS groups, with no difference between the latter two groups. The high-ELS group exhibited elevated CRP compared with the no/moderate-ELS group. Findings suggest that high-ELS exposure is associated with a unique AUD neuroclinical presentation marked by greater negative emotionality, and inflammatory profile characterized by elevated peripheral CRP.
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Affiliation(s)
- Dylan E Kirsch
- Department of Psychology, University of California, Los Angeles, 1285 Franz Hall, Box 951563, Los Angeles, CA, 90095-1563, USA
| | - Erica N Grodin
- Department of Psychology, University of California, Los Angeles, 1285 Franz Hall, Box 951563, Los Angeles, CA, 90095-1563, USA
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, Los Angeles, CA, USA
| | - Steven J Nieto
- Department of Psychology, University of California, Los Angeles, 1285 Franz Hall, Box 951563, Los Angeles, CA, 90095-1563, USA
| | - Annabel Kady
- Department of Psychology, University of California, Los Angeles, 1285 Franz Hall, Box 951563, Los Angeles, CA, 90095-1563, USA
| | - Lara A Ray
- Department of Psychology, University of California, Los Angeles, 1285 Franz Hall, Box 951563, Los Angeles, CA, 90095-1563, USA.
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, Los Angeles, CA, USA.
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5
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Dilly GA, Blednov YA, Warden AS, Ezerskiy L, Fleischer C, Plotkin JD, Patil S, Osterndorff-Kahanek EA, Mayfield J, Mayfield RD, Homanics GE, Messing RO. Knockdown of Tlr3 in dorsal striatum reduces ethanol consumption and acute functional tolerance in male mice. Brain Behav Immun 2024; 118:437-448. [PMID: 38499210 PMCID: PMC11007683 DOI: 10.1016/j.bbi.2024.03.021] [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: 08/16/2023] [Revised: 03/05/2024] [Accepted: 03/15/2024] [Indexed: 03/20/2024] Open
Abstract
Systemic activation of toll-like receptor 3 (TLR3) signaling using poly(I:C), a TLR3 agonist, drives ethanol consumption in several rodent models, while global knockout of Tlr3 reduces drinking in C57BL/6J male mice. To determine if brain TLR3 pathways are involved in drinking behavior, we used CRISPR/Cas9 genome editing to generate a Tlr3 floxed (Tlr3F/F) mouse line. After sequence confirmation and functional validation of Tlr3 brain transcripts, we injected Tlr3F/F male mice with an adeno-associated virus expressing Cre recombinase (AAV5-CMV-Cre-GFP) to knockdown Tlr3 in the medial prefrontal cortex, nucleus accumbens, or dorsal striatum (DS). Only Tlr3 knockdown in the DS decreased two-bottle choice, every-other-day (2BC-EOD) ethanol consumption. DS-specific deletion of Tlr3 also increased intoxication and prevented acute functional tolerance to ethanol. In contrast, poly(I:C)-induced activation of TLR3 signaling decreased intoxication in male C57BL/6J mice, consistent with its ability to increase 2BC-EOD ethanol consumption in these mice. We also found that TLR3 was highly colocalized with DS neurons. AAV5-Cre transfection occurred predominantly in neurons, but there was minimal transfection in astrocytes and microglia. Collectively, our previous and current studies show that activating or inhibiting TLR3 signaling produces opposite effects on acute responses to ethanol and on ethanol consumption. While previous studies, however, used global knockout or systemic TLR3 activation (which alter peripheral and brain innate immune responses), the current results provide new evidence that brain TLR3 signaling regulates ethanol drinking. We propose that activation of TLR3 signaling in DS neurons increases ethanol consumption and that a striatal TLR3 pathway is a potential target to reduce excessive drinking.
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Affiliation(s)
- Geoffrey A Dilly
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States; Institute for Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neurology, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, United States
| | - Yuri A Blednov
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States
| | - Anna S Warden
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States
| | - Lubov Ezerskiy
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States
| | - Caleb Fleischer
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States
| | - Jesse D Plotkin
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States
| | - Shruti Patil
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States
| | | | - Jody Mayfield
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States
| | - R Dayne Mayfield
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States
| | - Gregg E Homanics
- Departments of Anesthesiology & Perioperative Medicine, Neurobiology, and Pharmacology & Chemical Biology, University of Pittsburgh, Pittsburgh, PA 15261, United States
| | - Robert O Messing
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, Austin, TX 78712, United States; Institute for Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neuroscience, The University of Texas at Austin, Austin, TX 78712, United States; Department of Neurology, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, United States.
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6
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He YX, Liu MN, Wang YY, Wu H, Wei M, Xue JY, Zou Y, Zhou X, Chen H, Li Z. Hovenia dulcis: a Chinese medicine that plays an essential role in alcohol-associated liver disease. Front Pharmacol 2024; 15:1337633. [PMID: 38650630 PMCID: PMC11033337 DOI: 10.3389/fphar.2024.1337633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 03/18/2024] [Indexed: 04/25/2024] Open
Abstract
Globally, alcohol-associated liver disease (ALD) has become an increased burden for society. Disulfirams, Benzodiazepines (BZDs), and corticosteroids are commonly used to treat ALD. However, the occurrence of side effects such as hepatotoxicity and dependence, impedes the achievement of desirable and optimal therapeutic efficacy. Therefore, there is an urgent need for more effective and safer treatments. Hovenia dulcis is an herbal medicine promoting alcohol removal clearance, lipid-lowering, anti-inflammatory, and hepatoprotective properties. Hovenia dulcis has a variety of chemical components such as dihydromyricetin, quercetin and beta-sitosterol, which can affect ALD through multiple pathways, including ethanol metabolism, immune response, hepatic fibrosis, oxidative stress, autophagy, lipid metabolism, and intestinal barrier, suggesting its promising role in the treatment of ALD. Thus, this work aims to comprehensively review the chemical composition of Hovenia dulcis and the molecular mechanisms involved in the process of ALD treatment.
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Affiliation(s)
- Yi-Xiang He
- The Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Digestive System Diseases of Luzhou City, Affiliated Traditional Medicine Hospital of Southwest Medical University, Luzhou, Sichuan, China
- College of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Meng-Nan Liu
- College of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Yang-Yang Wang
- The Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Digestive System Diseases of Luzhou City, Affiliated Traditional Medicine Hospital of Southwest Medical University, Luzhou, Sichuan, China
- College of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Hao Wu
- College of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Mei Wei
- The Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Digestive System Diseases of Luzhou City, Affiliated Traditional Medicine Hospital of Southwest Medical University, Luzhou, Sichuan, China
- College of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Jin-Yi Xue
- College of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Yuan Zou
- College of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Xin Zhou
- The Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Digestive System Diseases of Luzhou City, Affiliated Traditional Medicine Hospital of Southwest Medical University, Luzhou, Sichuan, China
- College of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou, Sichuan, China
- Department of Spleen and Stomach Diseases, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Hui Chen
- The Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Digestive System Diseases of Luzhou City, Affiliated Traditional Medicine Hospital of Southwest Medical University, Luzhou, Sichuan, China
- College of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou, Sichuan, China
- Department of Spleen and Stomach Diseases, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Zhi Li
- The Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Digestive System Diseases of Luzhou City, Affiliated Traditional Medicine Hospital of Southwest Medical University, Luzhou, Sichuan, China
- College of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou, Sichuan, China
- Department of Spleen and Stomach Diseases, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou, Sichuan, China
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7
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Ho MF, Zhang C, Moon I, Tuncturk M, Coombes BJ, Biernacka J, Skime M, Oesterle TS, Karpyak VM, Li H, Weinshilboum R. Molecular mechanisms involved in alcohol craving, IRF3, and endoplasmic reticulum stress: a multi-omics study. Transl Psychiatry 2024; 14:165. [PMID: 38531832 DOI: 10.1038/s41398-024-02880-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 03/13/2024] [Accepted: 03/15/2024] [Indexed: 03/28/2024] Open
Abstract
Alcohol use disorder (AUD) is the most prevalent substance use disorder worldwide. Acamprosate and naltrexone are anti-craving drugs used in AUD pharmacotherapy. However, molecular mechanisms underlying their anti-craving effect remain unclear. This study utilized a patient-derived induced pluripotent stem cell (iPSC)-based model system and anti-craving drugs that are used to treat AUD as "molecular probes" to identify possible mechanisms associated with alcohol craving. We examined the pathophysiology of craving and anti-craving drugs by performing functional genomics studies using iPSC-derived astrocytes and next-generation sequencing. Specifically, RNA sequencing performed using peripheral blood mononuclear cells from AUD patients with extreme values for alcohol craving intensity prior to treatment showed that inflammation-related pathways were highly associated with alcohol cravings. We then performed a genome-wide assessment of chromatin accessibility and gene expression profiles of induced iPSC-derived astrocytes in response to ethanol or anti-craving drugs. Those experiments identified drug-dependent epigenomic signatures, with IRF3 as the most significantly enriched motif in chromatin accessible regions. Furthermore, the activation of IRF3 was associated with ethanol-induced endoplasmic reticulum (ER) stress which could be attenuated by anti-craving drugs, suggesting that ER stress attenuation might be a target for anti-craving agents. In conclusion, we found that craving intensity was associated with alcohol consumption and treatment outcomes. Our functional genomic studies suggest possible relationships among craving, ER stress, IRF3 and the actions of anti-craving drugs.
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Affiliation(s)
- Ming-Fen Ho
- Department of Psychiatry and Psychology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
| | - Cheng Zhang
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Irene Moon
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Mustafa Tuncturk
- Department of Psychiatry and Psychology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Brandon J Coombes
- Department of Health Sciences Research, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Joanna Biernacka
- Department of Health Sciences Research, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Michelle Skime
- Department of Psychiatry and Psychology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Tyler S Oesterle
- Department of Psychiatry and Psychology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Victor M Karpyak
- Department of Psychiatry and Psychology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Hu Li
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Richard Weinshilboum
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
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8
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Naidu C, Cox AJ, Lewohl JM. Influence of sex and liver cirrhosis on the expression of miR-146a-5p and its target genes, IRAK1 and TRAF6. Brain Res 2024; 1827:148763. [PMID: 38215866 DOI: 10.1016/j.brainres.2024.148763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/06/2024] [Accepted: 01/08/2024] [Indexed: 01/14/2024]
Abstract
Long-term alcohol misuse triggers cellular adaptions in susceptible regions of the human brain, resulting in neurodegeneration, neuroinflammation and altered gene expression. Previous studies have identified ∼35 miRNAs, including miR-146a-5p, which are up-regulated in the frontal cortex of males with alcohol use disorder (AUD), but the influence of liver cirrhosis and sex is unknown. The expression of miR-146a-5p, IRAK1, and TRAF6 was measured in the prefrontal cortex of controls and individuals with AUD with and without cirrhosis of the liver. Further, individuals were genotyped for two SNPs, rs2910164 and rs57095329. The expression of miR-146a-5p was significantly different between sexes. In males the expression of miR-146a-5p was increased in individuals with AUD with and without liver cirrhosis compared with controls. In females miR-146a-5p expression was significantly lower in individuals with AUD compared with both controls and those with AUD and cirrhosis, suggesting that both the severity of alcohol misuse and the sex of the individual influences the expression of miR-146a-5p. The expression of TRAF6 was significantly lower in individuals with uncomplicated AUD compared with those with AUD and cirrhosis. The expression of IRAK1 did not differ between groups or sexes. There was no influence of genotype on expression. Increased expression of miR-146a-5p did not correlate with decreased IRAK1 or TRAF6 expression suggesting a loss of regulatory control of the TLR4 pathway. Understanding sex-specific differences in the regulation of gene expression in AUD is key to determine which inflammatory pathways could be targeted for therapeutic intervention.
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Affiliation(s)
- Carol Naidu
- School of Pharmacy and Medical Sciences, Griffith University Gold Coast Campus, Southport, Brisbane, Australia
| | - Amanda J Cox
- School of Pharmacy and Medical Sciences, Griffith University Gold Coast Campus, Southport, Brisbane, Australia
| | - Joanne M Lewohl
- School of Pharmacy and Medical Sciences, Griffith University Gold Coast Campus, Southport, Brisbane, Australia.
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9
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Xiao T, Roland A, Chen Y, Guffey S, Kash T, Kimbrough A. A role for circuitry of the cortical amygdala in excessive alcohol drinking, withdrawal, and alcohol use disorder. Alcohol 2024:S0741-8329(24)00034-X. [PMID: 38447789 DOI: 10.1016/j.alcohol.2024.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 01/30/2024] [Accepted: 02/26/2024] [Indexed: 03/08/2024]
Abstract
Alcohol use disorder (AUD) poses a significant public health challenge. Individuals with AUD engage in chronic and excessive alcohol consumption, leading to cycles of intoxication, withdrawal, and craving behaviors. This review explores the involvement of the cortical amygdala (CoA), a cortical brain region that has primarily been examined in relation to olfactory behavior, in the expression of alcohol dependence and excessive alcohol drinking. While extensive research has identified the involvement of numerous brain regions in AUD, the CoA has emerged as a relatively understudied yet promising candidate for future study. The CoA plays a vital role in rewarding and aversive signaling and olfactory-related behaviors and has recently been shown to be involved in alcohol-dependent drinking in mice. The CoA projects directly to brain regions that are critically important for AUD, such as the central amygdala, bed nucleus of the stria terminalis, and basolateral amygdala. These projections may convey key modulatory signaling that drives excessive alcohol drinking in alcohol-dependent subjects. This review summarizes existing knowledge on the structure and connectivity of the CoA and its potential involvement in AUD. Understanding the contribution of this region to excessive drinking behavior could offer novel insights into the etiology of AUD and potential therapeutic targets.
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Affiliation(s)
- Tiange Xiao
- Purdue University, Department of Basic Medical Sciences, College of Veterinary Medicine
| | - Alison Roland
- Bowles Center for Alcohol Studies, University of North Carolina School of Medicine, Chapel Hill, NC, USA; Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Yueyi Chen
- Purdue University, Department of Basic Medical Sciences, College of Veterinary Medicine
| | - Skylar Guffey
- Purdue University, Department of Basic Medical Sciences, College of Veterinary Medicine
| | - Thomas Kash
- Bowles Center for Alcohol Studies, University of North Carolina School of Medicine, Chapel Hill, NC, USA; Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Adam Kimbrough
- Purdue University, Department of Basic Medical Sciences, College of Veterinary Medicine; Purdue Institute for Integrative Neuroscience; Purdue University, Weldon School of Biomedical Engineering; Purdue Institute of Inflammation, Immunology, and Infectious Disease.
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10
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Rasool AE, Furlong T, Prasad AA. Microglia activity in the human basal ganglia is altered in alcohol use disorder and reversed with remission from alcohol. Addict Biol 2024; 29:e13374. [PMID: 38380734 PMCID: PMC10898843 DOI: 10.1111/adb.13374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 11/10/2023] [Accepted: 01/15/2024] [Indexed: 02/22/2024]
Abstract
Alcohol use disorder (AUD) is characterized by cycles of abuse, withdrawal, and relapse. Neuroadaptations in the basal ganglia are observed in AUD; specifically in the putamen, globus pallidus (GP), and ventral pallidum (VP). These regions are associated with habit formation, drug-seeking behaviors, and reward processing. While previous studies have shown the crucial role of glial cells in drug seeking, it remains unknown whether glial cells in the basal ganglia are altered in AUD. Glial cells in the putamen, GP, and VP were examined in human post-mortem tissue of AUD and alcohol remission cases. Immunohistochemistry was performed to analyze cell count, staining intensity, and morphology of microglia and astrocytes, using markers Iba-1 and GFAP. Morphological analysis revealed a significant decrease in microglia cell size and process retraction, indicating activation or a dystrophic microglia phenotype in individuals with AUD compared to controls. Microglia staining intensity was also higher in the GP and VP in AUD cases, whereas microglia staining intensity and cell size in remission cases were not different to control cases. In contrast, no astrocyte changes were observed in examined brain regions for both AUD and remission cases compared to controls. These results suggest alcohol exposure alters microglia, potentially contributing to dysfunctions in the basal ganglia that maintain addiction, and abstinence from alcohol may reverse microglia changes and associated dysfunctions. Overall, this study further characterizes AUD neuropathology and implicates microglia in the putamen, GP, and VP as a potential target for therapy.
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Affiliation(s)
- Ameer Elena Rasool
- School of Medical Sciences, Faculty of Medicine and HealthUniversity of SydneySydneyNew South WalesAustralia
| | - Teri Furlong
- School of MedicineUniversity of New SouthSydneyNew South WalesAustralia
| | - Asheeta A. Prasad
- School of Medical Sciences, Faculty of Medicine and HealthUniversity of SydneySydneyNew South WalesAustralia
- School of PsychologyUniversity of New SouthSydneyNew South WalesAustralia
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Getachew B, Hauser SR, Bennani S, El Kouhen N, Sari Y, Tizabi Y. Adolescent alcohol drinking interaction with the gut microbiome: implications for adult alcohol use disorder. ADVANCES IN DRUG AND ALCOHOL RESEARCH 2024; 4:11881. [PMID: 38322648 PMCID: PMC10846679 DOI: 10.3389/adar.2024.11881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Reciprocal communication between the gut microbiota and the brain, commonly referred to as the "gut-brain-axis" is crucial in maintaining overall physiological homeostasis. Gut microbiota development and brain maturation (neuronal connectivity and plasticity) appear to be synchronized and to follow the same timeline during childhood (immature), adolescence (expansion) and adulthood (completion). It is important to note that the mesolimbic reward circuitry develops early on, whereas the maturation of the inhibitory frontal cortical neurons is delayed. This imbalance can lead to increased acquirement of reward-seeking and risk-taking behaviors during adolescence, and consequently eventuate in heightened risk for substance abuse. Thus, there is high initiation of alcohol drinking in early adolescence that significantly increases the risk of alcohol use disorder (AUD) in adulthood. The underlying causes for heightened AUD risk are not well understood. It is suggested that alcohol-associated gut microbiota impairment during adolescence plays a key role in AUD neurodevelopment in adulthood. Furthermore, alcohol-induced dysregulation of microglia, either directly or indirectly through interaction with gut microbiota, may be a critical neuroinflammatory pathway leading to neurodevelopmental impairments and AUD. In this review article, we highlight the influence of adolescent alcohol drinking on gut microbiota, gut-brain axis and microglia, and eventual manifestation of AUD. Furthermore, novel therapeutic interventions via gut microbiota manipulations are discussed briefly.
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Affiliation(s)
- Bruk Getachew
- Department of Pharmacology, Howard University College of Medicine, Washington, DC, United States
| | - Sheketha R. Hauser
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Samia Bennani
- Faculty of Medicine and Pharmacy of Casablanca, Hassan II University, Casablanca, Morocco
| | - Nacer El Kouhen
- Faculty of Medicine and Pharmacy of Casablanca, Hassan II University, Casablanca, Morocco
| | - Youssef Sari
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, OH, United States
| | - Yousef Tizabi
- Department of Pharmacology, Howard University College of Medicine, Washington, DC, United States
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Ugiliweneza B, Wang D, Rood B, Boakye M, Castillo C, Hetman M. Increased Incidence of Depression and Chronic Pain in Traumatic Spinal Cord Injury Patients With Pre-Injury Alcohol Use Disorder: Longitudinal Analysis of Insurance Claim Database. Neurotrauma Rep 2024; 5:28-36. [PMID: 38249325 PMCID: PMC10797174 DOI: 10.1089/neur.2023.0096] [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] [Indexed: 01/23/2024] Open
Abstract
Alcohol use disorder (AUD) increases risk of traumatic spinal cord injury (SCI) and is associated with depression, anxiety, and chronic pain. Given that these neuropsychiatric morbidities are frequently observed in SCI patients, the effects of pre-injury AUD on risk of depression, anxiety, or chronic pain were analyzed using an insurance claim database. Of 10,591 traumatic SCI patients, 507 had AUD-associated claims in a 12-month period before injury. Those AUD-positive SCI patients showed distinct demographic characteristics, including greater representation of men, younger age, more comorbidities, lower coverage by commercial insurance, and more cervical-level injuries. The AUD group also showed elevated pre-injury comorbidity of depression, anxiety, and chronic pain. However, multi-regression analysis revealed an increased odds ratio (OR) of de novo diagnosis of post-SCI depression in AUD patients 6 months (1.671; 95% confidence interval [CI]: 1.124, 2.483) and 1 year post-injury (1.511; 95% CI: 1.071, 2.131). The OR of de novo post-SCI anxiety was unaffected by pre-injury AUD. Finally, 1 year after SCI, pre-injury AUD increased the OR of de novo diagnosis of post-injury chronic pain (1.545; 95% CI: 1.223, 1.951). Thus, pre-injury AUD may be a risk factor for development of depression and chronic pain after traumatic SCI.
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Affiliation(s)
- Beatrice Ugiliweneza
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, Kentucky, USA
- Department of Neurological Surgery, University of Louisville, Louisville, Kentucky, USA
| | - Dengzhi Wang
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, Kentucky, USA
- Department of Neurological Surgery, University of Louisville, Louisville, Kentucky, USA
| | - Benjamin Rood
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, Kentucky, USA
- Department of Neurological Surgery, University of Louisville, Louisville, Kentucky, USA
- Graduate Program in Biochemistry and Molecular Genetics, University of Louisville, Louisville, Kentucky, USA
| | - Maxwell Boakye
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, Kentucky, USA
- Department of Neurological Surgery, University of Louisville, Louisville, Kentucky, USA
| | - Camilo Castillo
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, Kentucky, USA
- Department of Neurological Surgery, University of Louisville, Louisville, Kentucky, USA
| | - Michal Hetman
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, Kentucky, USA
- Department of Neurological Surgery, University of Louisville, Louisville, Kentucky, USA
- Department of Anatomical Sciences and Neurobiology, University of Louisville, Louisville, Kentucky, USA
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, University of Louisville, Louisville, Kentucky, USA
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Tsermpini EE, Goričar K, Kores Plesničar B, Plemenitaš Ilješ A, Dolžan V. The Disease Model of Addiction: The Impact of Genetic Variability in the Oxidative Stress and Inflammation Pathways on Alcohol Dependance and Comorbid Psychosymptomatology. Antioxidants (Basel) 2023; 13:20. [PMID: 38275640 PMCID: PMC10812813 DOI: 10.3390/antiox13010020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 12/15/2023] [Accepted: 12/19/2023] [Indexed: 01/27/2024] Open
Abstract
Oxidative stress and neuroinflammation are involved in the pathogenesis of alcohol addiction. However, little is known regarding the effect of genetic, behavioral, psychological, and environmental sources of origin on the inflammation and oxidative stress pathways of patients with alcohol addiction. Our study aimed to evaluate the impact of selected common functional single-nucleotide polymorphisms in inflammation and oxidative stress genes on alcohol addiction, and common comorbid psychosymptomatology. Our study included 89 hospitalized alcohol-addicted patients and 93 healthy individuals, all Slovenian males. Their DNA was isolated from peripheral blood and patients were genotyped for PON1 rs705379, rs705381, rs854560, and rs662, SOD2 rs4880, GPX1 rs1050450, IL1B rs1143623, rs16944, and rs1071676, IL6 rs1800795, IL6R rs2228145, and miR146a rs2910164. Kruskal-Wallis and Mann-Whitney tests were used for the additive and dominant genetic models, respectively. Our findings suggested the involvement of IL6 rs1800795 in alcohol addiction. Moreover, our data indicated that the genetic variability of SOD2 and PON1, as well as IL1B and IL6R, may be related to comorbid psychosymptomatology, revealing a potential indirect means of association of both the oxidative stress and inflammation pathways.
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Affiliation(s)
- Evangelia Eirini Tsermpini
- Pharmacogenetics Laboratory, Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia; (E.E.T.); (K.G.)
| | - Katja Goričar
- Pharmacogenetics Laboratory, Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia; (E.E.T.); (K.G.)
| | - Blanka Kores Plesničar
- University Psychiatric Clinic, 1000 Ljubljana, Slovenia;
- Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Anja Plemenitaš Ilješ
- Department of Psychiatry, University Clinical Centre Maribor, 2000 Maribor, Slovenia
| | - Vita Dolžan
- Pharmacogenetics Laboratory, Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia; (E.E.T.); (K.G.)
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Kang S, Lee J, Choi S, Nesbitt J, Min PH, Trushina E, Choi DS. Moderate ethanol exposure reduces astrocyte-induced neuroinflammatorysignaling and cognitive decline in presymptomatic APP/PS1 mice. RESEARCH SQUARE 2023:rs.3.rs-3627637. [PMID: 38077051 PMCID: PMC10705690 DOI: 10.21203/rs.3.rs-3627637/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Background Alcohol use disorder (AUD) has been associated with the development of neurodegenerative diseases, including Alzheimer's disease (AD). However, recent studies demonstrate that moderate alcohol consumption may be protective against dementia and cognitive decline. Methods We examined astrocyte function, low-density lipoprotein (LDL) receptor-related protein 1 (LRP1), and the NF-κB p65 and IKK-α/β signaling pathways in modulating neuroinflammation and amyloid beta (Aβ) deposition. We assessed apolipoprotein E (ApoE) in the mouse brain using IHC and ELISA in response to moderate ethanol exposure (MEE). First, to confirm the intracerebral distribution of ApoE, we co-stained with GFAP, a marker for astrocytes that biosynthesize ApoE. We sought to investigate whether the ethanol-induced upregulation of LRP1 could potentially inhibit the activity of IL-1β and TNF-α induced IKK-α/β towards NF-κB p65, resulting in a reduction of pro-inflammatory cytokines. To evaluate the actual Aβ load in the brains of APP/PS1 mice, we performed with a specific antibody Aβ (Thioflavin S) on both air- and ethanol-exposed groups, subsequently analyzing Aβ levels. We also measured glucose uptake activity using 18F-FDG in APP/PS1 mice. Finally, we investigated whether MEE induced cognitive and memory changes using the Y maze, noble objective recognition (NOR) test, and Morris water maze (MWM). Results Our findings demonstrate that MEE reduced astrocytic glial fibrillary acidic protein (GFAP) and ApoE levels in the cortex and hippocampus in presymptomatic APP/PS1 mice. Interestingly, increased LRP1 protein expression is accompanied by dampening the IKK-α/β-NF-κB p65 pathway, resulting in decreased IL-1β and TNF-α levels in male mice. Notably, female mice show reduced anti-inflammatory cytokines, IL-4, and IL-10 levels without altering IL-1β and TNF-α concentrations. In both males and females, Aβ plaques, a hallmark of AD, were reduced in the cortex and hippocampus of ethanol-exposed presymptomatic APP/PS1 mice. Consistently, MEE increased fluorodeoxyglucose (FDG)-positron emission tomography (PET)-based brain activities and normalized cognitive and memory deficits in the APP/PS1 mice. Conclusions Our findings suggest that MEE may benefit AD pathology via modulating LRP1 expression, potentially reducing neuroinflammation and attenuating Aβ deposition. Our study implies that reduced astrocyte derived ApoE and LDL cholesterol levels are critical for attenuating AD pathology.
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Affiliation(s)
| | - Jeyeon Lee
- Mayo Clinic College of Medicine, and Science
| | - Sun Choi
- Mayo Clinic College of Medicine, and Science
| | | | - Paul H Min
- Mayo Clinic College of Medicine, and Science
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Zhang Y, Liu J, Chen L, Yang T, Luo X, Cui X, Wu S, He Y, Lu J. Prevalence of co-occurring severe depression and psychotic symptoms in college students and its relationship with childhood maltreatment. CHILD ABUSE & NEGLECT 2023; 146:106470. [PMID: 37748208 DOI: 10.1016/j.chiabu.2023.106470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 07/17/2023] [Accepted: 09/13/2023] [Indexed: 09/27/2023]
Abstract
BACKGROUND It has been demonstrated that childhood maltreatment (CM) is associated with an increased risk of depression and psychotic symptoms. However, there is still a lack of studies on the prevalence of co-occurring severe depression and psychotic symptoms (CSDPS) and the association between CM and CSDPS among college students. OBJECTIVE We aim to investigate the prevalence and demographic distribution of CSDPS among Chinese college students and to examine its relationship with CM. PARTICIPANTS AND SETTING A total of 7351 college students aged 18 and above completed the survey. Finally, 6854 valid questionnaires were included for further analysis. METHODS The Childhood Trauma Questionnaire and the item for witnessing domestic violence were used to assess the CM. The Prodromal Questionnaire-16 and the depression subscale of the Depression Anxiety and Stress-21 scale were used to assess psychotic symptoms and depressive symptoms. RESULTS The prevalence of CSDPS was 1.47 % among the college students. The multivariate logistic regression analysis showed that emotional abuse and emotional neglect were associated with an increased risk of CSDPS (all p < 0.05). The risk of CSDPS was dramatically increased for individuals who had experienced ≥3 types of CM (OR = 22.929, p < 0.001), as compared to those who had experienced 1-2 types of CM (OR = 4.452, p < 0.001) and those without the experience of CM. CONCLUSION CM was found to be associated with an increased risk of CSDPS among the college students. Notably, experiencing more types of CM was also associated with a higher risk of CSDPS.
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Affiliation(s)
- Yaru Zhang
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, and National Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
| | - Jianbo Liu
- Department of Child Psychiatry of Shenzhen Kangning Hospital, Shenzhen Mental Health Center, Shenzhen 518003, China
| | - Lin Chen
- The First Clinical College, Changsha Medical University, Changsha, Hunan, China
| | - Tingyu Yang
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, and National Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
| | - Xuerong Luo
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, and National Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
| | - Xilong Cui
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, and National Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
| | - Shuxian Wu
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, and National Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
| | - Yuqiong He
- Department of Psychiatry, National Clinical Research Center for Mental Disorders, and National Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China.
| | - Jianping Lu
- Department of Child Psychiatry of Shenzhen Kangning Hospital, Shenzhen Mental Health Center, Shenzhen 518003, China.
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Chaturvedi A, Rao G, Praharaj SK, Guruprasad KP, Pais V, Sadacharan CM. Decreased expression of CD200 on peripheral blood leukocytes in alcohol dependence. Alcohol 2023; 113:21-25. [PMID: 37595696 DOI: 10.1016/j.alcohol.2023.08.003] [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: 05/01/2023] [Revised: 08/08/2023] [Accepted: 08/14/2023] [Indexed: 08/20/2023]
Abstract
Chronic alcohol use induces innate immune genes, which activate the innate immune system. Neuroimmune regulatory proteins [e.g., Cluster of Differentiation 200 (CD200)] are immune response regulators and are involved in balancing the immune response. This study aimed to investigate the expression of CD200 on the surface of peripheral blood leukocytes in patients with alcohol use disorder and compare them with controls. Fifty male patients with alcohol use disorder were included in the study. A baseline assessment was done, and alcohol use history, craving, and withdrawal scores were collected. A 2-mL venous blood sample was collected from cases and controls for immunophenotyping of CD200. The control group consisted of 50 participants with similar socio-economic backgrounds. The cellular expression of CD200 on total leukocytes (median ± IQR) [39.94 (28.85, 50.01)] in cases was significantly lower compared to controls [45.07 (37.70, 51.69)] (U = 896, p = 0.015). Expression of CD200 on lymphocytes in cases was negatively correlated with years of heavy drinking and this was statistically significant (r = -0.321, p = 0.023). The study indicates that cellular expression of CD200 on the surface of peripheral blood leukocytes is reduced in alcohol-dependent patients. This reduction can contribute to exaggerated immune activity, release of pro-inflammatory cytokines, chronic microglial activation, neuroinflammation, and neurodegeneration in alcohol dependence.
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Affiliation(s)
- Abhishek Chaturvedi
- Division of Biochemistry, Department of Basic Medical Sciences (DBMS), Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Guruprasad Rao
- Division of Biochemistry, Department of Basic Medical Sciences (DBMS), Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.
| | - Samir Kumar Praharaj
- Department of Psychiatry, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India; Clinical Research Centre for Neuromodulation in Psychiatry, Department of Psychiatry, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.
| | - Kanive Parashiva Guruprasad
- Department of Ageing Research, Manipal School of Life Sciences ((MSLS), Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Vivek Pais
- Akhila Karnataka Jana Jagruthi Vedike, Shree Kshethra Dharmasthala Complex, Belthangady, 574214, Dakshina Kannada District, Karnataka, India
| | - Chakravarthy Marx Sadacharan
- Department of Biomedical Sciences, Tilman J. Fertitta Family College of Medicine, University of Houston, 5055 Medical Circle, Houston, TX, 77204, United States
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Zhou C, Ruiz HH, Ling L, Maurizi G, Sakamoto K, Liberini CG, Wang L, Stanley A, Egritag HE, Sanz SM, Lindtner C, Butera MA, Buettner C. Sympathetic overdrive and unrestrained adipose lipolysis drive alcohol-induced hepatic steatosis in rodents. Mol Metab 2023; 78:101813. [PMID: 37777008 PMCID: PMC10590866 DOI: 10.1016/j.molmet.2023.101813] [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: 06/12/2023] [Revised: 09/26/2023] [Accepted: 09/27/2023] [Indexed: 10/02/2023] Open
Abstract
OBJECTIVE Hepatic steatosis is a key initiating event in the pathogenesis of alcohol-associated liver disease (ALD), the most detrimental organ damage resulting from alcohol use disorder. However, the mechanisms by which alcohol induces steatosis remain incompletely understood. We have previously found that alcohol binging impairs brain insulin action, resulting in increased adipose tissue lipolysis by unrestraining sympathetic nervous system (SNS) outflow. Here, we examined whether an impaired brain-SNS-adipose tissue axis drives hepatic steatosis through unrestrained adipose tissue lipolysis and increased lipid flux to the liver. METHODS We examined the role of lipolysis, and the brain-SNS-adipose tissue axis and stress in alcohol induced hepatic triglyceride accumulation in a series of rodent models: pharmacological inhibition of the negative regulator of insulin signaling protein-tyrosine phosphatase 1β (PTP1b) in the rat brain, tyrosine hydroxylase (TH) knockout mice as a pharmacogenetic model of sympathectomy, adipocyte specific adipose triglyceride lipase (ATGL) knockout mice, wildtype (WT) mice treated with β3 adrenergic agonist or undergoing restraint stress. RESULTS Intracerebral administration of a PTP1b inhibitor, inhibition of adipose tissue lipolysis and reduction of sympathetic outflow ameliorated alcohol induced steatosis. Conversely, induction of adipose tissue lipolysis through β3 adrenergic agonism or by restraint stress worsened alcohol induced steatosis. CONCLUSIONS Brain insulin resistance through upregulation of PTP1b, increased sympathetic activity, and unrestrained adipose tissue lipolysis are key drivers of alcoholic steatosis. Targeting these drivers of steatosis may provide effective therapeutic strategies to ameliorate ALD.
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Affiliation(s)
- Chunxue Zhou
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Henry H Ruiz
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Li Ling
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Giulia Maurizi
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Kenichi Sakamoto
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Division of Endocrinology, Department of Medicine, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Claudia G Liberini
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ling Wang
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Adrien Stanley
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Hale E Egritag
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Sofia M Sanz
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Claudia Lindtner
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Mary A Butera
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Division of Endocrinology, Department of Medicine, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Christoph Buettner
- Department of Medicine and Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Division of Endocrinology, Department of Medicine, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA.
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Munshi S, Albrechet-Souza L, Dos-Santos RC, Stelly CE, Secci ME, Gilpin NW, Tasker JG. Acute Ethanol Modulates Synaptic Inhibition in the Basolateral Amygdala via Rapid NLRP3 Inflammasome Activation and Regulates Anxiety-Like Behavior in Rats. J Neurosci 2023; 43:7902-7912. [PMID: 37739795 PMCID: PMC10669756 DOI: 10.1523/jneurosci.1744-22.2023] [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: 09/13/2022] [Revised: 08/22/2023] [Accepted: 09/14/2023] [Indexed: 09/24/2023] Open
Abstract
Chronic alcohol exposure leads to a neuroinflammatory response involving activation of the nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) inflammasome and proinflammatory cytokine production. Acute ethanol (EtOH) exposure activates GABAergic synapses in the central and basolateral amygdala (BLA) ex vivo, but whether this rapid modulation of synaptic inhibition is because of an acute inflammatory response and alters anxiety-like behavior in male and female animals is not known. Here, we tested the hypotheses that acute EtOH facilitates inhibitory synaptic transmission in the BLA by activating the NLRP3 inflammasome-dependent acute inflammatory response, that the alcohol-induced increase in inhibition is cell type and sex dependent, and that acute EtOH in the BLA reduces anxiety-like behavior. Acute EtOH application at a binge-like concentration (22-44 mm) stimulated synaptic GABA release from putative parvalbumin (PV) interneurons onto BLA principal neurons in ex vivo brain slices from male, but not female, rats. The EtOH facilitation of synaptic inhibition was blocked by antagonists of the Toll-like receptor 4 (TLR4), the NLRP3 inflammasome, and interleukin-1 receptors, suggesting it was mediated by a rapid local neuroinflammatory response in the BLA. In vivo, bilateral injection of EtOH directly into the BLA produced an acute concentration-dependent reduction in anxiety-like behavior in male but not female rats. These findings demonstrate that acute EtOH in the BLA regulates anxiety-like behavior in a sex-dependent manner and suggest that this effect is associated with presynaptic facilitation of parvalbumin-expressing interneuron inputs to BLA principal neurons via a local NLRP3 inflammasome-dependent neuroimmune response.SIGNIFICANCE STATEMENT Chronic alcohol exposure produces a neuroinflammatory response, which contributes to alcohol-associated pathologies. Acute alcohol administration increases inhibitory synaptic signaling in the brain, but the mechanism for the rapid alcohol facilitation of inhibitory circuits is unknown. We found that acute ethanol at binge-like concentrations in the basolateral amygdala (BLA) facilitates GABA release from parvalbumin-expressing (PV) interneuron synapses onto principal neurons in ex vivo brain slices from male rats and that intra-BLA ethanol reduces anxiety-like behavior in vivo in male rats, but not female rats. The ethanol (EtOH) facilitation of inhibition in the BLA is mediated by Toll-like receptor 4 (TLR4) and nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) inflammasome activation and proinflammatory IL-1β signaling, which suggests a rapid NLRP3 inflammasome-dependent neuroimmune cascade that plays a critical role in acute alcohol intoxication.
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Affiliation(s)
- Soumyabrata Munshi
- Department of Cell and Molecular Biology, Tulane University, New Orleans, Louisiana 70118
| | - Lucas Albrechet-Souza
- Department of Cell Biology and Anatomy, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112
- Alcohol and Drug Center of Excellence, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112
| | | | - Claire E Stelly
- Department of Cell and Molecular Biology, Tulane University, New Orleans, Louisiana 70118
| | - Maria E Secci
- Department of Physiology, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112
- Alcohol and Drug Center of Excellence, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112
- Southeast Louisiana Veterans Affairs Healthcare System (SLVHCS), New Orleans, Louisiana 70119
| | - Nicholas W Gilpin
- Department of Physiology, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112
- Alcohol and Drug Center of Excellence, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112
- Neuroscience Center of Excellence, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112
- Southeast Louisiana Veterans Affairs Healthcare System (SLVHCS), New Orleans, Louisiana 70119
| | - Jeffrey G Tasker
- Department of Cell and Molecular Biology, Tulane University, New Orleans, Louisiana 70118
- Tulane Brain Institute, Tulane University, New Orleans, Louisiana 70118
- Southeast Louisiana Veterans Affairs Healthcare System (SLVHCS), New Orleans, Louisiana 70119
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19
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Hitzemann R, Ozburn AR, Lockwood D, Phillips TJ. Modeling Brain Gene Expression in Alcohol Use Disorder with Genetic Animal Models. Curr Top Behav Neurosci 2023. [PMID: 37982929 DOI: 10.1007/7854_2023_455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2023]
Abstract
Animal genetic models have and will continue to provide important new information about the behavioral and physiological adaptations associated with alcohol use disorder (AUD). This chapter focuses on two models, ethanol preference and drinking in the dark (DID), their usefulness in interrogating brain gene expression data and the relevance of the data obtained to interpret AUD-related GWAS and TWAS studies. Both the animal and human data point to the importance for AUD of changes in synaptic transmission (particularly glutamate and GABA transmission), of changes in the extracellular matrix (specifically including collagens, cadherins and protocadherins) and of changes in neuroimmune processes. The implementation of new technologies (e.g., cell type-specific gene expression) is expected to further enhance the value of genetic animal models in understanding AUD.
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Affiliation(s)
- Robert Hitzemann
- Department of Behavioral Neuroscience, Portland Alcohol Research Center, Oregon Health and Science University, Portland, OR, USA.
| | - Angela R Ozburn
- Department of Behavioral Neuroscience, Portland Alcohol Research Center, Oregon Health and Science University, Portland, OR, USA
| | - Denesa Lockwood
- Department of Behavioral Neuroscience, Portland Alcohol Research Center, Oregon Health and Science University, Portland, OR, USA
| | - Tamara J Phillips
- Department of Behavioral Neuroscience, Portland Alcohol Research Center, Oregon Health and Science University, Portland, OR, USA
- Veterans Affairs Portland Health Care System, Portland, OR, USA
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20
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Diaz LA, Winder GS, Leggio L, Bajaj JS, Bataller R, Arab JP. New insights into the molecular basis of alcohol abstinence and relapse in alcohol-associated liver disease. Hepatology 2023:01515467-990000000-00605. [PMID: 37862466 DOI: 10.1097/hep.0000000000000645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 10/11/2023] [Indexed: 10/22/2023]
Abstract
Alcohol use disorder remains a significant public health concern, affecting around 5% of adults worldwide. Novel pathways of damage have been described during the last years, providing insight into the mechanism of injury due to alcohol misuse beyond the direct effect of ethanol byproducts on the liver parenchyma and neurobehavioral mechanisms. Thus, the gut-liver-brain axis and immune system involvement could be therapeutic targets for alcohol use disorder. In particular, changes in gut microbiota composition and function, and bile acid homeostasis, have been shown with alcohol consumption and cessation. Alcohol can also directly disrupt intestinal and blood-brain barriers. Activation of the immune system can be triggered by intestinal barrier dysfunction and translocation of bacteria, pathogen-associated molecular patterns (such as lipopolysaccharide), cytokines, and damage-associated molecular patterns. These factors, in turn, promote liver and brain inflammation and the progression of liver fibrosis. Other involved mechanisms include oxidative stress, apoptosis, autophagy, and the release of extracellular vesicles and miRNA from hepatocytes. Potential therapeutic targets include gut microbiota (probiotics and fecal microbiota transplantation), neuroinflammatory pathways, as well as neuroendocrine pathways, for example, the ghrelin system (ghrelin receptor blockade), incretin mimetics (glucagon-like peptide-1 analogs), and the mineralocorticoid receptor system (spironolactone). In addition, support with psychological and behavioral treatments is essential to address the multiple dimensions of alcohol use disorder. In the future, a personalized approach considering these novel targets can contribute to significantly decreasing the alcohol-associated burden of disease.
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Affiliation(s)
- Luis Antonio Diaz
- Departamento de Gastroenterología, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | - Lorenzo Leggio
- Clinical Psychoneuroendocrinology and Neuropsychopharmacology Section, Translational Addiction Medicine Branch, National Institutes of Health, NIDA and NIAAA, Baltimore, Maryland, USA
| | - Jasmohan S Bajaj
- Division of Gastroenterology, Hepatology, and Nutrition, Virginia Commonwealth University and Central Virginia Veterans Health Care System, Richmond, Virginia, USA
| | - Ramon Bataller
- Liver Unit, Hospital Clinic, Institut d'Investigacions August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Juan Pablo Arab
- Departamento de Gastroenterología, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
- Department of Medicine, Division of Gastroenterology, Schulich School of Medicine, Western University, London, Ontario, Canada
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21
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Teng PN, Barakat W, Tran SM, Tran ZM, Bateman NW, Conrads KA, Wilson KN, Oliver J, Gist G, Hood BL, Zhou M, Maxwell GL, Leggio L, Conrads TP, Lee MR. Brain proteomic atlas of alcohol use disorder in adult males. Transl Psychiatry 2023; 13:318. [PMID: 37833300 PMCID: PMC10575941 DOI: 10.1038/s41398-023-02605-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 09/16/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023] Open
Abstract
Alcohol use disorder (AUD) affects transcriptomic, epigenetic and proteomic expression in several organs, including the brain. There has not been a comprehensive analysis of altered protein abundance focusing on the multiple brain regions that undergo neuroadaptations occurring in AUD. We performed a quantitative proteomic analysis using a liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis of human postmortem tissue from brain regions that play key roles in the development and maintenance of AUD, the amygdala (AMG), hippocampus (HIPP), hypothalamus (HYP), nucleus accumbens (NAc), prefrontal cortex (PFC) and ventral tegmental area (VTA). Brain tissues were from adult males with AUD (n = 11) and matched controls (n = 16). Across the two groups, there were >6000 proteins quantified with differential protein abundance in AUD compared to controls in each of the six brain regions. The region with the greatest number of differentially expressed proteins was the AMG, followed by the HYP. Pathways associated with differentially expressed proteins between groups (fold change > 1.5 and LIMMA p < 0.01) were analyzed by Ingenuity Pathway Analysis (IPA). In the AMG, adrenergic, opioid, oxytocin, GABA receptor and cytokine pathways were among the most enriched. In the HYP, dopaminergic signaling pathways were the most enriched. Proteins with differential abundance in AUD highlight potential therapeutic targets such as oxytocin, CSNK1D (PF-670462), GABAB receptor and opioid receptors and may lead to the identification of other potential targets. These results improve our understanding of the molecular alterations of AUD across brain regions that are associated with the development and maintenance of AUD. Proteomic data from this study is publicly available at www.lmdomics.org/AUDBrainProteomeAtlas/ .
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Affiliation(s)
- Pang-Ning Teng
- Women's Health Integrated Research Center, Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, USA
| | - Waleed Barakat
- Women's Health Integrated Research Center, Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, USA
| | - Sophie M Tran
- Women's Health Integrated Research Center, Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, USA
| | - Zoe M Tran
- Women's Health Integrated Research Center, Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, USA
| | - Nicholas W Bateman
- Women's Health Integrated Research Center, Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, USA
| | - Kelly A Conrads
- Women's Health Integrated Research Center, Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, USA
| | - Katlin N Wilson
- Women's Health Integrated Research Center, Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, USA
| | - Julie Oliver
- Women's Health Integrated Research Center, Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, USA
| | - Glenn Gist
- Women's Health Integrated Research Center, Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, USA
| | - Brian L Hood
- Women's Health Integrated Research Center, Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, USA
| | - Ming Zhou
- Women's Health Integrated Research Center, Women's Service Line, Inova Health System, Falls Church, VA, USA
| | - G Larry Maxwell
- Women's Health Integrated Research Center, Women's Service Line, Inova Health System, Falls Church, VA, USA
| | - Lorenzo Leggio
- Clinical Psychoneuroendocrinology and Neuropsychopharmacology Section, Translational Addiction Medicine Branch, National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Baltimore, Bethesda, Maryland, USA
- Medication Development Program, National Institute on Drug Abuse Intramural Research Program, National Institutes of Health, Baltimore, Maryland, USA
- Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, School of Public Health, Brown University, Providence, Rhode Island, USA
- Division of Addiction Medicine, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC, USA
| | - Thomas P Conrads
- Women's Health Integrated Research Center, Women's Service Line, Inova Health System, Falls Church, VA, USA.
| | - Mary R Lee
- Veterans Affairs Medical Center, Washington, DC, USA.
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22
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Carvalho L, Chen H, Maienschein-Cline M, Glover EJ, Pandey SC, Lasek AW. Conserved role for PCBP1 in altered RNA splicing in the hippocampus after chronic alcohol exposure. Mol Psychiatry 2023; 28:4215-4224. [PMID: 37537282 PMCID: PMC10827656 DOI: 10.1038/s41380-023-02184-y] [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: 12/14/2022] [Revised: 07/04/2023] [Accepted: 07/07/2023] [Indexed: 08/05/2023]
Abstract
We previously discovered using transcriptomics that rats undergoing withdrawal after chronic ethanol exposure had increased expression of several genes encoding RNA splicing factors in the hippocampus. Here, we examined RNA splicing in the rat hippocampus during withdrawal from chronic ethanol exposure and in postmortem hippocampus of human subjects diagnosed with alcohol use disorder (AUD). We found that expression of the gene encoding the splicing factor, poly r(C) binding protein 1 (PCBP1), was elevated in the hippocampus of rats during withdrawal after chronic ethanol exposure and AUD subjects. We next analyzed the rat RNA-Seq data for differentially expressed (DE) exon junctions. One gene, Hapln2, had increased usage of a novel 3' splice site in exon 4 during withdrawal. This splice site was conserved in human HAPLN2 and was used more frequently in the hippocampus of AUD compared to control subjects. To establish a functional role for PCBP1 in HAPLN2 splicing, we performed RNA immunoprecipitation (RIP) with a PCBP1 antibody in rat and human hippocampus, which showed enriched PCBP1 association near the HAPLN2 exon 4 3' splice site in the hippocampus of rats during ethanol withdrawal and AUD subjects. Our results indicate a conserved role for the splicing factor PCBP1 in aberrant splicing of HAPLN2 after chronic ethanol exposure. As the HAPLN2 gene encodes an extracellular matrix protein involved in nerve conduction velocity, use of this alternative splice site is predicted to result in loss of protein function that could negatively impact hippocampal function in AUD.
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Affiliation(s)
- Luana Carvalho
- Center for Alcohol Research in Epigenetics, Department of Psychiatry, University of Illinois at Chicago, Chicago, IL, 60612, USA.
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, 23298, USA.
| | - Hu Chen
- Center for Alcohol Research in Epigenetics, Department of Psychiatry, University of Illinois at Chicago, Chicago, IL, 60612, USA
| | - Mark Maienschein-Cline
- Center for Alcohol Research in Epigenetics, Department of Psychiatry, University of Illinois at Chicago, Chicago, IL, 60612, USA
- Research Informatics Core, University of Illinois at Chicago, Chicago, IL, 60612, USA
| | - Elizabeth J Glover
- Center for Alcohol Research in Epigenetics, Department of Psychiatry, University of Illinois at Chicago, Chicago, IL, 60612, USA
| | - Subhash C Pandey
- Center for Alcohol Research in Epigenetics, Department of Psychiatry, University of Illinois at Chicago, Chicago, IL, 60612, USA
- Jesse Brown VA Medical Center, Chicago, IL, 60612, USA
| | - Amy W Lasek
- Center for Alcohol Research in Epigenetics, Department of Psychiatry, University of Illinois at Chicago, Chicago, IL, 60612, USA
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, 23298, USA
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23
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Gruol DL, Calderon D, Huitron-Resendiz S, Cates-Gatto C, Roberts AJ. Impact of Elevated Brain IL-6 in Transgenic Mice on the Behavioral and Neurochemical Consequences of Chronic Alcohol Exposure. Cells 2023; 12:2306. [PMID: 37759527 PMCID: PMC10527024 DOI: 10.3390/cells12182306] [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: 04/11/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 09/29/2023] Open
Abstract
Alcohol consumption activates the neuroimmune system of the brain, a system in which brain astrocytes and microglia play dominant roles. These glial cells normally produce low levels of neuroimmune factors, which are important signaling factors and regulators of brain function. Alcohol activation of the neuroimmune system is known to dysregulate the production of neuroimmune factors, such as the cytokine IL-6, thereby changing the neuroimmune status of the brain, which could impact the actions of alcohol. The consequences of neuroimmune-alcohol interactions are not fully known. In the current studies we investigated this issue in transgenic (TG) mice with altered neuroimmune status relative to IL-6. The TG mice express elevated levels of astrocyte-produced IL-6, a condition known to occur with alcohol exposure. Standard behavioral tests of alcohol drinking and negative affect/emotionality were carried out in homozygous and heterozygous TG mice and control mice to assess the impact of neuroimmune status on the actions of chronic intermittent alcohol (ethanol) (CIE) exposure on these behaviors. The expressions of signal transduction and synaptic proteins were also assessed by Western blot to identify the impact of alcohol-neuroimmune interactions on brain neurochemistry. The results from these studies show that neuroimmune status with respect to IL-6 significantly impacts the effects of alcohol on multiple levels.
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Affiliation(s)
- Donna L. Gruol
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Delilah Calderon
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA 92037, USA
| | | | - Chelsea Cates-Gatto
- Animal Models Core Facility, The Scripps Research Institute, La Jolla, CA 92037, USA (A.J.R.)
| | - Amanda J. Roberts
- Animal Models Core Facility, The Scripps Research Institute, La Jolla, CA 92037, USA (A.J.R.)
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24
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Cruz B, Borgonetti V, Bajo M, Roberto M. Sex-dependent factors of alcohol and neuroimmune mechanisms. Neurobiol Stress 2023; 26:100562. [PMID: 37601537 PMCID: PMC10432974 DOI: 10.1016/j.ynstr.2023.100562] [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: 05/12/2023] [Revised: 07/25/2023] [Accepted: 08/02/2023] [Indexed: 08/22/2023] Open
Abstract
Excessive alcohol use disrupts neuroimmune signaling across various cell types, including neurons, microglia, and astrocytes. The present review focuses on recent, albeit limited, evidence of sex differences in biological factors that mediate neuroimmune responses to alcohol and underlying neuroimmune systems that may influence alcohol drinking behaviors. Females are more vulnerable than males to the neurotoxic and negative consequences of chronic alcohol drinking, reflected by elevations of pro-inflammatory cytokines and inflammatory mediators. Differences in cytokine, microglial, astrocytic, genomic, and transcriptomic evidence suggest females are more reactive than males to neuroinflammatory changes after chronic alcohol exposure. The growing body of evidence supports that innate immune factors modulate synaptic transmission, providing a mechanistic framework to examine sex differences across neurocircuitry. Targeting neuroimmune signaling may be a viable strategy for treating AUD, but more research is needed to understand sex-specific differences in alcohol drinking and neuroimmune mechanisms.
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Affiliation(s)
- Bryan Cruz
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA, 92073
| | - Vittoria Borgonetti
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA, 92073
| | - Michal Bajo
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA, 92073
| | - Marisa Roberto
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA, 92073
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25
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Marsland P, Trapp S, Vore A, Lutzke A, Varlinskaya EI, Deak T. Intermittent Exposure to a Single Bottle of Ethanol Modulates Stress Sensitivity: Impact of Age at Exposure Initiation. Cells 2023; 12:1991. [PMID: 37566070 PMCID: PMC10417636 DOI: 10.3390/cells12151991] [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: 06/20/2023] [Revised: 07/28/2023] [Accepted: 07/31/2023] [Indexed: 08/12/2023] Open
Abstract
Alcohol use during adolescence is a serious public health problem, with binge drinking and high-intensity drinking being particularly harmful to the developing adolescent brain. To investigate the adverse consequences of binge drinking and high-intensity adolescent drinking, adolescent rodents were intermittently exposed to ethanol through intragastric gavage, intraperitoneal injection, or vapor inhalation. These models revealed the long-lasting behavioral and neural consequences of adolescent intermittent ethanol (AIE) exposure. The present study was designed to characterize a different AIE model, namely, intermittent exposure to a single bottle of 10% ethanol as the only source of fluids on a 2 days on/2 days off (water days) schedule, and to determine whether this AIE exposure model would produce changes in hormonal and neuroimmune responsiveness to challenges of differing modalities. Assessments of ethanol intake as well as blood and brain ethanol concentrations (BECs and BrECs, respectively) in adult male and female rats (Experiment 1) revealed that BECs and BrECs peaked following access to ethanol for a 2 h period when assessed 1 h into the dark cycle. Experiment 2 revealed age differences in ethanol intake, BECs, and BrECs following a 2 h access to ethanol (1 h into the dark cycle), with adolescents ingesting more ethanol and reaching higher BECs as well as BrECs than adults. In Experiment 3, intermittent exposure to a single bottle of 10% ethanol for 10 cycles of 2 days on/2 days off was initiated either in early or late adolescence, followed by an acute systemic immune challenge with lipopolysaccharide (LPS) in adulthood. LPS increased corticosterone and progesterone levels regardless of sex and prior ethanol history, whereas an LPS-induced increase in cytokine gene expression in the hippocampus was evident only in ethanol-exposed males and females, with females who underwent early exposure to ethanol being more affected than their later-exposed counterparts. In Experiment 4, intermittent ethanol exposure in females was initiated either in adolescence or adulthood and lasted for 12 ethanol exposure cycles. Then, behavioral (freezing behavior), hormonal (corticosterone and progesterone levels), and neuroimmune (cytokine gene expression in the PVN, amygdala, and hippocampus) responses to novel environments (mild stressors) and shock (intense stressors) were assessed. More pronounced behavioral and hormonal changes, as well as changes in cytokine gene expression, were evident in the shock condition than following placement in the novel environment, with prior history of ethanol exposure not playing a substantial role. Interleukin (IL)-1β gene expression was enhanced by shock in the PVN, whereas shock-induced increases in IL-6 gene expression were evident in the hippocampus. Together, these findings demonstrate that our intermittent adolescent exposure model enhances responsiveness to immune but not stress challenges, with females being more vulnerable to this AIE effect than males.
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Affiliation(s)
| | | | | | | | | | - Terrence Deak
- Behavioral Neuroscience Program, Department of Psychology, Binghamton University, Binghamton, NY 13902-6000, USA
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26
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Raval NR, Angarita G, Matuskey D, Miller R, Drake LR, Kapinos M, Nabulsi N, Huang Y, Carson RE, O'Malley SS, Cosgrove KP, Hillmer AT. Imaging the brain's immune response to alcohol with [ 11C]PBR28 TSPO Positron Emission Tomography. Mol Psychiatry 2023; 28:3384-3390. [PMID: 37532797 PMCID: PMC10743097 DOI: 10.1038/s41380-023-02198-6] [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: 02/06/2023] [Revised: 07/18/2023] [Accepted: 07/20/2023] [Indexed: 08/04/2023]
Abstract
In humans, the negative effects of alcohol are linked to immune dysfunction in both the periphery and the brain. Yet acute effects of alcohol on the neuroimmune system and its relationships with peripheral immune function are not fully understood. To address this gap, immune response to an alcohol challenge was measured with positron emission tomography (PET) using the radiotracer [11C]PBR28, which targets the 18-kDa translocator protein, a marker sensitive to immune challenges. Participants (n = 12; 5 F; 25-45 years) who reported consuming binge levels of alcohol (>3 drinks for females; >4 drinks for males) 1-3 months before scan day were enrolled. Imaging featured a baseline [11C]PBR28 scan followed by an oral laboratory alcohol challenge over 90 min. An hour later, a second [11C]PBR28 scan was acquired. Dynamic PET data were acquired for at least 90 min with arterial blood sampling to measure the metabolite-corrected input function. [11C]PBR28 volume of distributions (VT) was estimated in the brain using multilinear analysis 1. Subjective effects, blood alcohol levels (BAL), and plasma cytokines were measured during the paradigm. Full completion of the alcohol challenge and data acquisition occurred for n = 8 (2 F) participants. Mean peak BAL was 101 ± 15 mg/dL. Alcohol significantly increased brain [11C]PBR28 VT (n = 8; F(1,49) = 34.72, p > 0.0001; Cohen's d'=0.8-1.7) throughout brain by 9-16%. Alcohol significantly altered plasma cytokines TNF-α (F(2,22) = 17.49, p < 0.0001), IL-6 (F(2,22) = 18.00, p > 0.0001), and MCP-1 (F(2,22) = 7.02, p = 0.004). Exploratory analyses identified a negative association between the subjective degree of alcohol intoxication and changes in [11C]PBR28 VT. These findings provide, to our knowledge, the first in vivo human evidence for an acute brain immune response to alcohol.
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Affiliation(s)
- Nakul R Raval
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
- Yale PET Center, Yale University, New Haven, CT, USA
| | - Gustavo Angarita
- Yale PET Center, Yale University, New Haven, CT, USA
- Department of Psychiatry, Yale University, New Haven, CT, USA
| | - David Matuskey
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
- Yale PET Center, Yale University, New Haven, CT, USA
- Department of Psychiatry, Yale University, New Haven, CT, USA
- Department of Neurology, Yale University New Haven, New Haven, CT, USA
| | - Rachel Miller
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
| | - Lindsey R Drake
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
- Yale PET Center, Yale University, New Haven, CT, USA
| | - Michael Kapinos
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
- Yale PET Center, Yale University, New Haven, CT, USA
| | - Nabeel Nabulsi
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
- Yale PET Center, Yale University, New Haven, CT, USA
| | - Yiyun Huang
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
- Yale PET Center, Yale University, New Haven, CT, USA
| | - Richard E Carson
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
- Yale PET Center, Yale University, New Haven, CT, USA
- Department of Biomedical Engineering, Yale School of Engineering and Applied Science, New Haven, CT, USA
| | | | - Kelly P Cosgrove
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
- Yale PET Center, Yale University, New Haven, CT, USA
- Department of Psychiatry, Yale University, New Haven, CT, USA
| | - Ansel T Hillmer
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA.
- Yale PET Center, Yale University, New Haven, CT, USA.
- Department of Psychiatry, Yale University, New Haven, CT, USA.
- Department of Biomedical Engineering, Yale School of Engineering and Applied Science, New Haven, CT, USA.
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27
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McGregor R, Matzeu A, Thannickal TC, Wu F, Cornford M, Martin-Fardon R, Siegel JM. Sensitivity of Hypocretin System to Chronic Alcohol Exposure: A Human and Animal Study. Neuroscience 2023; 522:1-10. [PMID: 37121379 PMCID: PMC10681027 DOI: 10.1016/j.neuroscience.2023.04.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 03/31/2023] [Accepted: 04/22/2023] [Indexed: 05/02/2023]
Abstract
Human heroin addicts and mice administered morphine for a 2 week period show a greatly increased number of hypothalamic hypocretin (Hcrt or orexin) producing neurons with a concomitant reduction in Hcrt cell size. Male rats addicted to cocaine similarly show an increased number of detectable Hcrt neurons. These findings led us to hypothesize that humans with alcohol use disorder (AUD) would show similar changes. We now report that humans with AUD have a decreased number and size of detectable Hcrt neurons. In addition, the intermingled melanin concentrating hormone (MCH) neurons are reduced in size. We saw no change in the size and number of tuberomammillary histamine neurons in AUD. Within the Hcrt/MCH neuronal field we found that microglia cell size was increased in AUD brains. In contrast, male rats with 2 week alcohol exposure, sufficient to elicit withdrawal symptoms, show no change in the number or size of Hcrt, MCH and histamine neurons, and no change in the size of microglia. The present study indicates major differences between the response of Hcrt neurons to opioids and that to alcohol in human subjects with a history of substance abuse.
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Affiliation(s)
- Ronald McGregor
- Neuropsychiatric Institute and Brain Research Institute, University of California, Los Angeles, 90095, USA; Neurobiology Research, VA Greater Los Angeles Healthcare System, North Hills, Los Angele, California 91343, USA.
| | - Alessandra Matzeu
- The Scripps Research Institute, Department of Molecular Medicine, 10550 North Torrey Pines Road, SR-107, La Jolla, CA 92037, USA
| | - Thomas C Thannickal
- Neuropsychiatric Institute and Brain Research Institute, University of California, Los Angeles, 90095, USA; Neurobiology Research, VA Greater Los Angeles Healthcare System, North Hills, Los Angele, California 91343, USA
| | - Frank Wu
- Neuropsychiatric Institute and Brain Research Institute, University of California, Los Angeles, 90095, USA; Neurobiology Research, VA Greater Los Angeles Healthcare System, North Hills, Los Angele, California 91343, USA
| | - Marcia Cornford
- Department of Pathology, Harbor University of California, Los Angeles, Medical, Center, Torrance, CA 90509, USA
| | - Rémi Martin-Fardon
- The Scripps Research Institute, Department of Molecular Medicine, 10550 North Torrey Pines Road, SR-107, La Jolla, CA 92037, USA
| | - Jerome M Siegel
- Neuropsychiatric Institute and Brain Research Institute, University of California, Los Angeles, 90095, USA; Neurobiology Research, VA Greater Los Angeles Healthcare System, North Hills, Los Angele, California 91343, USA
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28
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Li R, Reiter JL, Chen AB, Chen SX, Foroud T, Edenberg HJ, Lai D, Liu Y. RNA alternative splicing impacts the risk for alcohol use disorder. Mol Psychiatry 2023; 28:2922-2933. [PMID: 37217680 PMCID: PMC10615768 DOI: 10.1038/s41380-023-02111-1] [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: 11/10/2022] [Revised: 04/28/2023] [Accepted: 05/05/2023] [Indexed: 05/24/2023]
Abstract
Alcohol use disorder (AUD) is a complex genetic disorder characterized by problems arising from excessive alcohol consumption. Identifying functional genetic variations that contribute to risk for AUD is a major goal. Alternative splicing of RNA mediates the flow of genetic information from DNA to gene expression and expands proteome diversity. We asked whether alternative splicing could be a risk factor for AUD. Herein, we used a Mendelian randomization (MR)-based approach to identify skipped exons (the predominant splicing event in brain) that contribute to AUD risk. Genotypes and RNA-seq data from the CommonMind Consortium were used as the training dataset to develop predictive models linking individual genotypes to exon skipping in the prefrontal cortex. We applied these models to data from the Collaborative Studies on Genetics of Alcoholism to examine the association between the imputed cis-regulated splicing outcome and the AUD-related traits. We identified 27 exon skipping events that were predicted to affect AUD risk; six of these were replicated in the Australian Twin-family Study of Alcohol Use Disorder. Their host genes are DRC1, ELOVL7, LINC00665, NSUN4, SRRM2 and TBC1D5. The genes downstream of these splicing events are enriched in neuroimmune pathways. The MR-inferred impacts of the ELOVL7 skipped exon on AUD risk was further supported in four additional large-scale genome-wide association studies. Additionally, this exon contributed to changes of gray matter volumes in multiple brain regions, including the visual cortex known to be involved in AUD. In conclusion, this study provides strong evidence that RNA alternative splicing impacts the susceptibility to AUD and adds new information on AUD-relevant genes and pathways. Our framework is also applicable to other types of splicing events and to other complex genetic disorders.
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Affiliation(s)
- Rudong Li
- Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Jill L Reiter
- Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Andy B Chen
- Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Steven X Chen
- Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Tatiana Foroud
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Howard J Edenberg
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Dongbing Lai
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Yunlong Liu
- Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
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Carvajal F, Sánchez-Gil A, Cardona D, Rincón-Cervera MA, Lerma-Cabrera JM. The Effect of Very-Long-Chain n-3 Polyunsaturated Fatty Acids in the Central Nervous System and Their Potential Benefits for Treating Alcohol Use Disorder: Reviewing Pre-Clinical and Clinical Data. Nutrients 2023; 15:2993. [PMID: 37447319 DOI: 10.3390/nu15132993] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/28/2023] [Accepted: 06/28/2023] [Indexed: 07/15/2023] Open
Abstract
Alcohol use poses a significant global health concern, leading to serious physical and socioeconomic issues worldwide. The current treatment options for problematic alcohol consumption are limited, leading to the exploration of alternative approaches, such as nutraceuticals. One promising target is very-long-chain n-3 polyunsaturated fatty acids (VLC n-3 PUFAs). This review aims to compile the most relevant pre-clinical and clinical evidence on the effect of VLC n-3 PUFAs on alcohol use disorders and related outcomes. The findings suggest that VLC n-3 PUFAs may alleviate the physiological changes induced by alcohol consumption, including neuroinflammation and neurotransmitter dysregulation. Additionally, they can reduce withdrawal symptoms, improve mood, and reduce stress level, all of which are closely associated with problematic alcohol consumption. However, more research is required to fully understand the precise mechanisms by which VLC n-3 PUFAs exert their function. Furthermore, PUFAs should not be considered a standalone solution, but as a complement to other therapeutic approaches. Although preliminary evidence supports the potential therapeutic effect of VLC n-3 PUFAs on problematic alcohol consumption, additional research is needed to validate these findings and determine the optimal use of PUFAs as part of a comprehensive approach to the treatment of alcohol use disorders.
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Affiliation(s)
- Francisca Carvajal
- Department of Psychology, University of Almeria, 04120 Almeria, Spain
- Health Research Center, University of Almeria, 04120 Almeria, Spain
| | - Ainhoa Sánchez-Gil
- Department of Psychology, University of Almeria, 04120 Almeria, Spain
- Health Research Center, University of Almeria, 04120 Almeria, Spain
| | - Diana Cardona
- Health Research Center, University of Almeria, 04120 Almeria, Spain
- Department of Nursing, Physiotherapy and Medicine, University of Almeria, 04120 Almeria, Spain
| | - Miguel Angel Rincón-Cervera
- Food Technology Division, ceiA3, CIAMBITAL, University of Almeria, 04120 Almeria, Spain
- Institute of Nutrition and Food Technology, University of Chile, Santiago 830490, Chile
| | - Jose Manuel Lerma-Cabrera
- Department of Psychology, University of Almeria, 04120 Almeria, Spain
- Health Research Center, University of Almeria, 04120 Almeria, Spain
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Guo ML, Roodsari SK, Cheng Y, Dempsey RE, Hu W. Microglia NLRP3 Inflammasome and Neuroimmune Signaling in Substance Use Disorders. Biomolecules 2023; 13:922. [PMID: 37371502 DOI: 10.3390/biom13060922] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/22/2023] [Accepted: 05/29/2023] [Indexed: 06/29/2023] Open
Abstract
During the last decade, substance use disorders (SUDs) have been increasingly recognized as neuroinflammation-related brain diseases. Various types of abused drugs (cocaine, methamphetamine, alcohol, opiate-like drugs, marijuana, etc.) can modulate the activation status of microglia and neuroinflammation levels which are involved in the pathogenesis of SUDs. Several neuroimmune signaling pathways, including TLR/NF-кB, reactive oxygen species, mitochondria dysfunction, as well as autophagy defection, etc., have been implicated in promoting SUDs. Recently, inflammasome-mediated signaling has been identified as playing critical roles in the microglia activation induced by abused drugs. Among the family of inflammasomes, NOD-, LRR-, and pyrin-domain-containing protein 3 (NLRP3) serves the primary research target due to its abundant expression in microglia. NLRP3 has the capability of integrating multiple external and internal inputs and coordinately determining the intensity of microglia activation under various pathological conditions. Here, we summarize the effects of abused drugs on NLRP3 inflammasomes, as well as others, if any. The research on this topic is still at an infant stage; however, the readily available findings suggest that NLRP3 inflammasome could be a common downstream effector stimulated by various types of abused drugs and play critical roles in determining abused-drug-mediated biological effects through enhancing glia-neuron communications. NLRP3 inflammasome might serve as a novel target for ameliorating the development of SUDs.
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Affiliation(s)
- Ming-Lei Guo
- Drug Addiction Laboratory, Department of Pathology and Anatomy, Eastern Virginia Medical School, Norfolk, VA 23507, USA
- Center for Integrative Neuroscience and Inflammatory Diseases, Eastern Virginia Medical School, Norfolk, VA 23507, USA
| | - Soheil Kazemi Roodsari
- Drug Addiction Laboratory, Department of Pathology and Anatomy, Eastern Virginia Medical School, Norfolk, VA 23507, USA
| | - Yan Cheng
- Drug Addiction Laboratory, Department of Pathology and Anatomy, Eastern Virginia Medical School, Norfolk, VA 23507, USA
| | - Rachael Elizabeth Dempsey
- Drug Addiction Laboratory, Department of Pathology and Anatomy, Eastern Virginia Medical School, Norfolk, VA 23507, USA
| | - Wenhui Hu
- Center for Metabolic Disease Research, Department of Pathology and Laboratory Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
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Nwachukwu KN, Mohammed HE, Mebane DR, Barber AW, Swartzwelder HS, Marshall SA. Acute and Chronic Ethanol Effects during Adolescence on Neuroimmune Responses: Consequences and Potential Pharmacologic Interventions. Cells 2023; 12:1423. [PMID: 37408257 PMCID: PMC10217092 DOI: 10.3390/cells12101423] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/12/2023] [Accepted: 05/16/2023] [Indexed: 07/07/2023] Open
Abstract
Heavy ethanol consumption during adolescence has been linked to neuroimmune response dysregulation and cognitive deficits in the developing adolescent brain. During adolescence, the brain is particularly susceptible to the pharmacological effects of ethanol that are induced by acute and chronic bouts of exposure. Numerous preclinical rodent model studies have used different ethanol administration techniques, such as intragastric gavage, self-administration, vapor, intraperitoneal, and free access, and while most models indicated proinflammatory neuroimmune responses in the adolescent brain, there are various factors that appear to influence this observation. This review synthesizes the most recent findings of the effects of adolescent alcohol use on toll-like receptors, cytokines, and chemokines, as well as the activation of astrocytes and microglia with an emphasis on differences associated with the duration of ethanol exposure (acute vs. chronic), the amount of exposure (e.g., dose or blood ethanol concentrations), sex differences, and the timing of the neuroimmune observation (immediate vs. persistent). Finally, this review discusses new therapeutics and interventions that may ameliorate the dysregulation of neuroimmune maladaptations after ethanol exposure.
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Affiliation(s)
- Kala N. Nwachukwu
- Department of Biological & Biomedical Sciences, North Carolina Central University, Durham, NC 27707, USA
- Integrated Biosciences PhD Program, North Carolina Central University, Durham, NC 27707, USA
| | - Hassan E. Mohammed
- Department of Biological & Biomedical Sciences, North Carolina Central University, Durham, NC 27707, USA
| | - DaQuan R. Mebane
- Department of Biological & Biomedical Sciences, North Carolina Central University, Durham, NC 27707, USA
| | - Andrew W. Barber
- Department of Biological & Biomedical Sciences, North Carolina Central University, Durham, NC 27707, USA
| | - H. Scott Swartzwelder
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC 27708, USA
| | - S. Alex Marshall
- Department of Biological & Biomedical Sciences, North Carolina Central University, Durham, NC 27707, USA
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Gano A, Deak T, Pautassi RM. A review on the reciprocal interactions between neuroinflammatory processes and substance use and misuse, with a focus on alcohol misuse. THE AMERICAN JOURNAL OF DRUG AND ALCOHOL ABUSE 2023; 49:269-282. [PMID: 37148274 PMCID: PMC10524510 DOI: 10.1080/00952990.2023.2201944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/06/2023] [Accepted: 04/08/2023] [Indexed: 05/08/2023]
Abstract
Background: The last decade has witnessed a surge of findings implicating neuroinflammatory processes as pivotal players in substance use disorders. The directionality of effects began with the expectation that the neuroinflammation associated with prolonged substance misuse contributes to long-term neuropathological consequences. As the literature grew, however, it became evident that the interactions between neuroinflammatory processes and alcohol and drug intake were reciprocal and part of a pernicious cycle in which disease-relevant signaling pathways contributed to an escalation of drug intake, provoking further inflammation-signaling and thereby exacerbating the neuropathological effects of drug misuse.Objectives: The goal of this review and its associated special issue is to provide an overview of the emergent findings relevant to understanding these reciprocal interactions. The review highlights the importance of preclinical and clinical studies in testing and validation of immunotherapeutics as viable targets for curtailing substance use and misuse, with a focus on alcohol misuse.Methods: A narrative review of the literature on drug and neuroinflammation was conducted, as well as articles published in this Special Issue on Alcohol- and Drug-induced Neuroinflammation: Insights from Pre-clinical Models and Clinical Research.Results: We argue that (a) demographic variables and genetic background contribute unique sensitivity to drug-related neuroinflammation; (b) co-morbidities between substance use disorders and affect dysfunction may share common inflammation-related signatures that predict the efficacy of immunotherapeutic drugs; and (c) examination of polydrug interactions with neuroinflammation is a critical area where greater research emphasis is needed.Conclusions: This review provides an accessible and example-driven review of the relationship between drug misuse, neuroinflammatory processes, and their resultant neuropathological outcomes.
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Affiliation(s)
- Anny Gano
- Developmental Exposure Alcohol Research Center, Behavioral Neuroscience Program, Department of Psychology, Binghamton, NY 13902-6000, United States of America
| | - Terrence Deak
- Developmental Exposure Alcohol Research Center, Behavioral Neuroscience Program, Department of Psychology, Binghamton, NY 13902-6000, United States of America
| | - Ricardo Marcos Pautassi
- Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, Argentina
- Instituto de Investigación Médica M. y M. Ferreyra (INIMEC – CONICET-Universidad Nacional de Córdoba), Córdoba, 5000, Argentina
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Gruol DL, Calderon D, French K, Melkonian C, Huitron-Resendiz S, Cates-Gatto C, Roberts AJ. Neuroimmune interactions with binge alcohol drinking in the cerebellum of IL-6 transgenic mice. Neuropharmacology 2023; 228:109455. [PMID: 36775097 PMCID: PMC10029700 DOI: 10.1016/j.neuropharm.2023.109455] [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: 06/08/2022] [Revised: 01/20/2023] [Accepted: 02/03/2023] [Indexed: 02/12/2023]
Abstract
The neuroimmune system of the brain, which is comprised primarily of astrocytes and microglia, regulates a variety of homeostatic mechanisms that underlie normal brain function. Numerous conditions, including alcohol consumption, can disrupt this regulatory process by altering brain levels of neuroimmune factors. Alcohol and neuroimmune factors, such as proinflammatory cytokines IL-6 and TNF-alpha, act at similar targets in the brain, including excitatory and inhibitory synaptic transmission. Thus, alcohol-induced production of IL-6 and/or TNF-alpha could be important contributing factors to the effects of alcohol on the brain. Recent studies indicate that IL-6 plays a role in alcohol drinking and the effects of alcohol on the brain activity following the cessation of alcohol consumption (post-alcohol period), however information on these topics is limited. Here we used homozygous and heterozygous female and male transgenic mice with increased astrocyte expression of IL-6 to examined further the interactions between alcohol and IL-6 with respect to voluntary alcohol drinking, brain activity during the post-alcohol period, IL-6 signal transduction, and expression of synaptic proteins. Wildtype littermates (WT) served as controls. The transgenic mice model brain neuroimmune status with respect to IL-6 in subjects with a history of persistent alcohol use. Results showed a genotype dependent reduction in voluntary alcohol consumption in the Drinking in the Dark protocol and in frequency-dependent relationships between brain activity in EEG recordings during the post-alcohol period and alcohol consumption. IL-6, TNF-alpha, IL-6 signal transduction partners pSTAT3 and c/EBP beta, and synaptic proteins were shown to play a role in these genotypic effects.
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Affiliation(s)
- Donna L Gruol
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA, 92037, USA.
| | - Delilah Calderon
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Katharine French
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Claudia Melkonian
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | | | - Chelsea Cates-Gatto
- Animal Models Core Facility, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Amanda J Roberts
- Animal Models Core Facility, The Scripps Research Institute, La Jolla, CA, 92037, USA
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Dugan MP, Ferguson LB, Hertz NT, Chalkley RJ, Burlingame AL, Shokat KM, Parker PJ, Messing RO. Chemical Genetic Identification of PKC Epsilon Substrates in Mouse Brain. Mol Cell Proteomics 2023; 22:100522. [PMID: 36863607 PMCID: PMC10105488 DOI: 10.1016/j.mcpro.2023.100522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 01/25/2023] [Accepted: 02/27/2023] [Indexed: 03/04/2023] Open
Abstract
PKC epsilon (PKCε) plays important roles in behavioral responses to alcohol and in anxiety-like behavior in rodents, making it a potential drug target for reducing alcohol consumption and anxiety. Identifying signals downstream of PKCε could reveal additional targets and strategies for interfering with PKCε signaling. We used a chemical genetic screen combined with mass spectrometry to identify direct substrates of PKCε in mouse brain and validated findings for 39 of them using peptide arrays and in vitro kinase assays. Prioritizing substrates with several public databases such as LINCS-L1000, STRING, GeneFriends, and GeneMAINA predicted interactions between these putative substrates and PKCε and identified substrates associated with alcohol-related behaviors, actions of benzodiazepines, and chronic stress. The 39 substrates could be broadly classified in three functional categories: cytoskeletal regulation, morphogenesis, and synaptic function. These results provide a list of brain PKCε substrates, many of which are novel, for future investigation to determine the role of PKCε signaling in alcohol responses, anxiety, responses to stress, and other related behaviors.
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Affiliation(s)
- Michael P Dugan
- Department of Neuroscience, The University of Texas at Austin, Austin, Texas, USA
| | - Laura B Ferguson
- Department of Neuroscience, The University of Texas at Austin, Austin, Texas, USA
| | - Nicholas T Hertz
- Department of Cellular and Molecular Pharmacology and Howard Hughes Medical Institute at the University of California San Francisco, San Francisco, California, USA; Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California, USA
| | - Robert J Chalkley
- Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California, USA
| | - Alma L Burlingame
- Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California, USA
| | - Kevan M Shokat
- Department of Cellular and Molecular Pharmacology and Howard Hughes Medical Institute at the University of California San Francisco, San Francisco, California, USA
| | - Peter J Parker
- The Francis Crick Institute, London, United Kingdom; School of Cancer and Pharmaceutical Sciences, King's College London, London, United Kingdom
| | - Robert O Messing
- Department of Neuroscience, The University of Texas at Austin, Austin, Texas, USA.
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Moreira-Júnior RE, Guimarães MADF, Etcheverria da Silva M, Maioli TU, Faria AMC, Brunialti-Godard AL. Animal model for high consumption and preference of ethanol and its interplay with high sugar and butter diet, behavior, and neuroimmune system. Front Nutr 2023; 10:1141655. [PMID: 37063320 PMCID: PMC10097969 DOI: 10.3389/fnut.2023.1141655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/10/2023] [Indexed: 03/31/2023] Open
Abstract
IntroductionMechanisms that dictate the preference for ethanol and its addiction are not only restricted to the central nervous system (CNS). An increasing body of evidence has suggested that abusive ethanol consumption directly affects the immune system, which in turn interacts with the CNS, triggering neuronal responses and changes, resulting in dependence on the drug. It is known that neuroinflammation and greater immune system reactivity are observed in behavioral disorders and that these can regulate gene transcription. However, there is little information about these findings of the transcriptional profile of reward system genes in high consumption and alcohol preference. In this regard, there is a belief that, in the striatum, an integrating region of the brain reward system, the interaction of the immune response and the transcriptional profile of the Lrrk2 gene that is associated with loss of control and addiction to ethanol may influence the alcohol consumption and preference. Given this information, this study aimed to assess whether problematic alcohol consumption affects the transcriptional profile of the Lrrk2 gene, neuroinflammation, and behavior and whether these changes are interconnected.MethodsAn animal model developed by our research group has been used in which male C57BL/6 mice and knockouts for the Il6 and Nfat genes were subjected to a protocol of high fat and sugar diet intake and free choice of ethanol in the following stages: Stage 1 (T1)—Dietary treatment, for 8 weeks, in which the animals receive high-calorie diet, High Sugar and Butter (HSB group), or standard diet, American Institute of Nutrition 93-Growth (AIN93G group); and Stage 2 (T2)—Ethanol consumption, in which the animals are submitted, for 4 weeks, to alcohol within the free choice paradigm, being each of them divided into 10 groups, four groups continued with the same diet and in the other six the HSB diet is substituted by the AIN93G diet. Five groups had access to only water, while the five others had a free choice between water and a 10% ethanol solution. The weight of the animals was evaluated weekly and the consumption of water and ethanol daily. At the end of the 12-week experiment, anxiety-like behavior was evaluated by the light/dark box test; compulsive-like behavior by Marble burying, transcriptional regulation of genes Lrrk2, Tlr4, Nfat, Drd1, Drd2, Il6, Il1β, Il10, and iNOS by RT-qPCR; and inflammatory markers by flow cytometry. Animals that the diet was replaced had an ethanol high preference and consumption.Results and discussionWe observed that high consumption and preference for ethanol resulted in (1) elevation of inflammatory cells in the brain, (2) upregulation of genes associated with cytokines (Il6 and Il1β) and pro-inflammatory signals (iNOS and Nfat), downregulation of anti-inflammatory cytokine (Il10), dopamine receptor (Drd2), and the Lrrk2 gene in the striatum, and (3) behavioral changes such as decreased anxiety-like behavior, and increased compulsive-like behavior. Our findings suggest that interactions between the immune system, behavior, and transcriptional profile of the Lrrk2 gene influence the ethanol preferential and abusive consumption.
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Affiliation(s)
- Renato Elias Moreira-Júnior
- Laboratório de Genética Animal e Humana, Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Mauro Andrade de Freitas Guimarães
- Laboratório de Imunobiologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Miguel Etcheverria da Silva
- Laboratório de Genética Animal e Humana, Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Tatiani Uceli Maioli
- Laboratório de Imunobiologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ana Maria Caetano Faria
- Laboratório de Imunobiologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ana Lúcia Brunialti-Godard
- Laboratório de Genética Animal e Humana, Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- *Correspondence: Ana Lúcia Brunialti Godard,
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Liou YJ, Wang TY, Lee SY, Chang YH, Tsai TY, Chen PS, Huang SY, Tzeng NS, Lee IH, Chen KC, Yang YK, Hong JS, Lu RB. Effects of comorbid alcohol use disorder on bipolar disorder: Focusing on neurocognitive function and inflammatory markers. Psychoneuroendocrinology 2023; 152:106083. [PMID: 36934699 DOI: 10.1016/j.psyneuen.2023.106083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 02/13/2023] [Accepted: 03/11/2023] [Indexed: 03/21/2023]
Abstract
BACKGROUND Alcohol use disorder (AUD) is a highly prevalent comorbid disorder in patients with bipolar disorder (BD). Both BD and AUD were found to be associated with inflammation and cognitive deficits, but few study has been done on BD comorbid with AUD (BD+AUD). We aimed to investigate the impacts of comorbid AUD and BD on cognitive function, inflammatory and neurotrophic markers. METHOD We recruited 641 BD patients, 150 patients with BD+AUD, and 185 healthy controls (HC). Neuropsychological tests [Wisconsin card sorting test (WCST), continuous performance test (CPT), and Wechsler memory scale - third edition (WMS-III)] and cytokine plasma levels [tumor necrosis factor-α (TNF-α), C-reactive protein (CRP), interleukin-8 (IL-8), transforming growth factor-β1 (TGF-β1), and brain-derived neurotrophic factor (BDNF)] were assessed. RESULTS BD+AUD patients had worse cognitive performance than those without AUD. There was a significant difference in the plasma levels of TNF-α, IL-8, and BDNF (P < 0.001, <0.001, and 0.01, respectively) between the patients and the HC groups. Post hoc analysis showed that BD+AUD patients had higher levels of TNF-α and IL-8 than BD-only patients (P < 0.001). Additionally, plasma IL-8 levels were negatively associated with number of completed categories in WCST (P = 0.02), and TNF-α levels were negatively associated with visual immediate index in WMS-III (P = 0.05). CONCLUSION Our results suggest that comorbid AUD and BD might worsen cognitive impairments and inflammatory processes. Further longitudinal studies on BD+AUD may be needed.
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Affiliation(s)
- Yen-Ju Liou
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Tzu-Yun Wang
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
| | - Sheng-Yu Lee
- Department of Psychiatry, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Yun-Hsuan Chang
- Institute of Gerontology, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Institute of Behavioral Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Institute of Genomics and Bioinformatics, College of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Tsung-Yu Tsai
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Po See Chen
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Institute of Behavioral Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - San-Yuan Huang
- Department of Psychiatry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Nian-Sheng Tzeng
- Department of Psychiatry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan; Student Counseling Center, National Defense Medical Center, Taipei, Taiwan
| | - I Hui Lee
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Kao Chin Chen
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yen Kuang Yang
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Institute of Behavioral Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Psychiatry, Tainan Hospital, Ministry of Health and Welfare, Tainan, Taiwan
| | - Jau-Shyong Hong
- Neurobiology Laboratory, NIH/NIEHS, Research Triangle Park, NC, USA
| | - Ru-Band Lu
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Yanjiao Furen Hospital, Hebei, China
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Crews FT, Coleman LG, Macht VA, Vetreno RP. Targeting Persistent Changes in Neuroimmune and Epigenetic Signaling in Adolescent Drinking to Treat Alcohol Use Disorder in Adulthood. Pharmacol Rev 2023; 75:380-396. [PMID: 36781218 PMCID: PMC9969522 DOI: 10.1124/pharmrev.122.000710] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 10/24/2022] [Accepted: 10/28/2022] [Indexed: 12/15/2022] Open
Abstract
Studies universally find early age of drinking onset is linked to lifelong risks of alcohol problems and alcohol use disorder (AUD). Assessment of the lasting effect of drinking during adolescent development in humans is confounded by the diversity of environmental and genetic factors that affect adolescent development, including emerging personality disorders and progressive increases in drinking trajectories into adulthood. Preclinical studies using an adolescent intermittent ethanol (AIE) exposure rat model of underage binge drinking avoid the human confounds and support lifelong changes that increase risks. AIE increases adult alcohol drinking, risky decision-making, reward-seeking, and anxiety as well as reductions in executive function that all increase risks for the development of an AUD. AIE causes persistent increases in brain neuroimmune signaling high-mobility group box 1 (HMGB1), Toll-like receptor, receptor for advanced glycation end products, and innate immune genes that are also found to be increased in human AUD brain. HMGB1 is released from cells by ethanol, both free and within extracellular vesicles, that act on neurons and glia, shifting transcription and cellular phenotype. AIE-induced decreases in adult hippocampal neurogenesis and loss of basal forebrain cholinergic neurons are reviewed as examples of persistent AIE-induced pathology. Both are prevented and reversed by anti-inflammatory and epigenetic drugs. Findings suggest AIE-increased HMGB1 signaling induces the RE-1 silencing transcript blunting cholinergic gene expression, shifting neuronal phenotype. Inhibition of HMGB1 neuroimmune signaling, histone methylation enzymes, and galantamine, the cholinesterase inhibitor, both prevent and reverse AIE pathology. These findings provide new targets that may reverse AUD neuropathology as well as other brain diseases linked to neuroimmune signaling. SIGNIFICANCE STATEMENT: Adolescent underage binge drinking studies find that earlier adolescent drinking is associated with lifelong alcohol problems including high levels of lifetime alcohol use disorder (AUD). Preclinical studies find the underage binge drinking adolescent intermittent ethanol (AIE) model causes lasting changes in adults that increase risks of developing adult alcohol problems. Loss of hippocampal neurogenesis and loss of basal forebrain cholinergic neurons provide examples of how AIE-induced epigenetic and neuroimmune signaling provide novel therapeutic targets for adult AUD.
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Affiliation(s)
- Fulton T Crews
- Bowles Center for Alcohol Studies and Departments of Pharmacology and Psychiatry, School of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina
| | - Leon G Coleman
- Bowles Center for Alcohol Studies and Departments of Pharmacology and Psychiatry, School of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina
| | - Victoria A Macht
- Bowles Center for Alcohol Studies and Departments of Pharmacology and Psychiatry, School of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina
| | - Ryan P Vetreno
- Bowles Center for Alcohol Studies and Departments of Pharmacology and Psychiatry, School of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina
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Alexander SN, Jeong HS, Szabo-Pardi TA, Burton MD. Sex-specific differences in alcohol-induced pain sensitization. Neuropharmacology 2023; 225:109354. [PMID: 36460082 DOI: 10.1016/j.neuropharm.2022.109354] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 11/20/2022] [Accepted: 11/23/2022] [Indexed: 12/02/2022]
Abstract
Pain sensitization is a phenomenon that occurs to protect tissues from damage and recent studies have shown how a variety of non-noxious stimuli included in our everyday lives can lead to pain sensitization. Consumption of large amounts of alcohol over a long period of time invokes alcohol use disorder (AUD), a complex pathological state that has many manifestations, including alcohol peripheral neuropathy (neuropathic pain). We asked if 'non-pathological' alcohol consumption can cause pain sensitization in the absence of other pathology? Studies have pointed to glia and other immune cells and their role in pain sensitization that results in cell and sex-specific responses. Using a low-dose and short-term ethanol exposure model, we investigated whether this exposure would sensitize mice to a subthreshold dose of an inflammatory mediator that normally does not induce pain. We observed female mice exhibited specific mechanical and higher thermal sensitivity than males. We also observed an increase in CD68+ macrophages in the ipsilateral dorsal root ganglia (DRG) and Iba1+ microglia in the ipsilateral spinal dorsal horn of animals that were exposed to ethanol and injected with subthreshold inflammatory prostaglandin E2. Our findings suggest that short-term ethanol exposure stimulates peripheral and central, immune and glial activation, respectively to induce pain sensitization. This work begins to reveal a possible mechanism behind the development of alcoholic peripheral neuropathy.
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Affiliation(s)
- Shevon N Alexander
- Neuroimmunology and Behavior Lab (NIB), Department of Neuroscience, School of Behavioral and Brain Science, Center for Advanced Pain Studies (CAPS), University of Texas at Dallas, Richardson, TX, USA
| | - Han S Jeong
- Neuroimmunology and Behavior Lab (NIB), Department of Neuroscience, School of Behavioral and Brain Science, Center for Advanced Pain Studies (CAPS), University of Texas at Dallas, Richardson, TX, USA
| | - Thomas A Szabo-Pardi
- Neuroimmunology and Behavior Lab (NIB), Department of Neuroscience, School of Behavioral and Brain Science, Center for Advanced Pain Studies (CAPS), University of Texas at Dallas, Richardson, TX, USA
| | - Michael D Burton
- Neuroimmunology and Behavior Lab (NIB), Department of Neuroscience, School of Behavioral and Brain Science, Center for Advanced Pain Studies (CAPS), University of Texas at Dallas, Richardson, TX, USA.
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Carlson ER, Guerin SP, Nixon K, Fonken LK. The neuroimmune system - Where aging and excess alcohol intersect. Alcohol 2023; 107:153-167. [PMID: 36150610 PMCID: PMC10023388 DOI: 10.1016/j.alcohol.2022.08.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 08/21/2022] [Accepted: 08/31/2022] [Indexed: 01/05/2023]
Abstract
As the percentage of the global population over age 65 grows, and with it a subpopulation of individuals with alcohol use disorder (AUD), understanding the effect of alcohol on the aged brain is of utmost importance. Neuroinflammation is implicated in both natural aging as well as alcohol use, and its role in alterations to brain morphology and function may be exacerbated in aging individuals who drink alcohol to excess. The neuroimmune response to alcohol in aging is complex. The few studies investigating this issue have reported heightened basal activity and either hypo- or hyper-reactivity to an alcohol challenge. This review of preclinical research will first introduce key players of the immune system, then explore changes in neuroimmune function with aging or alcohol alone, with discussion of vulnerable brain regions, changes in cytokines, and varied reactions of microglia and astrocytes. We will then consider different levels of alcohol exposure, relevant animal models of AUD, and neuroimmune activation by alcohol across the lifespan. By identifying key findings, challenges, and targets for future research, we hope to bring more attention and resources to this underexplored area of inquiry.
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Affiliation(s)
- Erika R Carlson
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, United States
| | - Steven P Guerin
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, United States
| | - Kimberly Nixon
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, United States
| | - Laura K Fonken
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, United States.
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40
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Randall CA, Sun D, Randall PA. Differential Effects of Nicotine, Alcohol, and Coexposure on Neuroimmune-Related Protein and Gene Expression in Corticolimbic Brain Regions of Rats. ACS Chem Neurosci 2023; 14:628-644. [PMID: 36705334 DOI: 10.1021/acschemneuro.2c00413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Nicotine and alcohol co-use is extremely common and their use constitutes two of the most common causes of preventable death, yet the underlying biological mechanisms are largely understudied. Activation of neuroimmune toll-like receptors (TLRs) promotes the induction of proinflammatory cascades and increases alcohol intake in rodents, which further promotes TLRs in the brain; nicotine may decrease central proinflammatory signaling. The current studies sought to determine the effects of nicotine ± alcohol (alone or in combination) on circulating blood plasma and TLR protein/gene expression in addiction-associated corticolimbic brain regions, including the prefrontal cortex-prelimbic (mPFC-PL) and nucleus accumbens core (AcbC). Adult rats were treated with alcohol (0 or 2 g/kg, IG) and exposed to nicotine vapor (0 or 30 mg/mL solution) daily for 2, 14, or 28 days. Plasma studies indicated no effects of independent exposure or coexposure in males. Coexposure decreased plasma nicotine levels versus nicotine-only treated females, yet alcohol and cotinine concentrations were unchanged. By 28 days, the anti-inflammatory cytokine IL-13 was decreased in alcohol-only females. Divergent changes in TLR3 (but not TLR4) protein occurred for independent-drug exposed males (but not coexposure), with reductions in the mPFC-PL after 14 days and increases in the AcbC by 28 days. Gene expression following chronic coexposure suggests nicotine may regionally counteract alcohol-induced inflammation, including increased AcbC-TLR3/4/7 and several downstream markers in females and increased mPFC-PL-TLR3 and -STAT3 (but not IRF3) evident in males with exposure to either drug alone. These findings give further insight into the role of sex and the neuroimmune system in independent exposure and coexposure to nicotine ± alcohol.
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Affiliation(s)
- Christie A Randall
- Department of Anesthesiology and Perioperative Medicine, College of Medicine, Pennsylvania State University, 500 University Drive, Hershey, Pennsylvania 17033, United States
| | - Dongxiao Sun
- Department of Pharmacology, College of Medicine, Pennsylvania State University, Hershey, Pennsylvania 17033 United States
| | - Patrick A Randall
- Department of Anesthesiology and Perioperative Medicine, College of Medicine, Pennsylvania State University, 500 University Drive, Hershey, Pennsylvania 17033, United States.,Department of Pharmacology, College of Medicine, Pennsylvania State University, Hershey, Pennsylvania 17033 United States
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Giffin KA, Lovelock DF, Besheer J. Toll-like receptor 3 neuroimmune signaling and behavior change: A strain comparison between Lewis and Wistar rats. Behav Brain Res 2023; 438:114200. [PMID: 36334783 PMCID: PMC10123804 DOI: 10.1016/j.bbr.2022.114200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 10/18/2022] [Accepted: 11/01/2022] [Indexed: 11/05/2022]
Abstract
There are many unanswered questions about the interaction between the immune system and behavior change, including the contributions of individual differences. The present study modeled individual differences in the immune system by comparing inbred Lewis rats, which have dysregulated stress and immune systems, to their genetically diverse parent strain, Wistar rats. The objective was to examine the consequences of an immune challenge on behavior and neuroimmune signaling in both strains. Peripheral administration of the toll-like receptor 3 (TLR3) agonist and viral memetic polyinosinic-polycytidylic acid (poly(I:C)) induced behavior changes in both strains, reducing locomotor activity and increasing avoidance behavior (time on the dark side of the light-dark box). Furthermore, poly(I:C) induced hyperarousal and increased avoidance behavior more in female Lewis than female Wistar rats. Baseline strain differences were also observed: Lewis rats had higher avoidance behavior and lower startle response than Wistars. Lewis rats also had lower levels of peripheral inflammation, as measured by spleen weight. Finally, poly(I:C) increased expression of genes in the TLR3 pathway, cytokine genes, and CD11b, a gene associated with proinflammatory actions of microglia, in the prelimbic cortex and central amygdala, with greater expression of cytokine genes in male rats. Lewis rats had lower baseline expression of some neuroimmune genes, particularly CD11b. Overall, we found constitutive strain differences in immune profiles and baseline differences in behavior, yet poly(I:C) generally induced similar behavior changes in males while hyperarousal and avoidance behavior were heightened in female Lewis rats.
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Affiliation(s)
| | | | - Joyce Besheer
- Bowles Center for Alcohol Studies, USA; Department of Psychiatry, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
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Wilson A, Periandri EM, Sievers M, Petruccelli E. Drosophila Stat92E Signaling Following Pre-exposure to Ethanol. Neurosci Insights 2023; 18:26331055221146755. [PMID: 36643884 PMCID: PMC9834942 DOI: 10.1177/26331055221146755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 12/06/2022] [Indexed: 01/11/2023] Open
Abstract
Repeated exposure to alcohol alters neuromolecular signaling that influences acute and long-lasting behaviors underlying Alcohol Use Disorder (AUD). Recent animal model research has implicated changes in the conserved JAK/STAT pathway, a signaling pathway classically associated with development and the innate immune system. How ethanol exposure impacts STAT signaling within neural cells is currently unclear. Here, we investigated the role of Drosophila Stat92E in ethanol-induced locomotion, signaling activity, and downstream transcriptional responses. Findings suggest that expressing Stat92E-RNAi causes enhanced ethanol-induced hyperactivity in flies previously exposed to ethanol. Furthermore, alternative splicing of Stat92E itself was detected after repeated ethanol exposure, although no changes were found in downstream transcriptional activity. This work adds to our growing understanding of altered neuromolecular signaling following ethanol exposure and suggests that STAT signaling may be a relevant target to consider for AUD treatment.
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Affiliation(s)
| | | | | | - Emily Petruccelli
- Emily Petruccelli, Southern Illinois University Edwardsville College of Arts and Sciences, 44 Circle Dr, Edwardsville, IL 62026, USA.
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Wang X, Li L, Bian C, Bai M, Yu H, Gao H, Zhao J, Zhang C, Zhao R. Alterations and correlations of gut microbiota, fecal, and serum metabolome characteristics in a rat model of alcohol use disorder. Front Microbiol 2023; 13:1068825. [PMID: 36687619 PMCID: PMC9846065 DOI: 10.3389/fmicb.2022.1068825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 11/22/2022] [Indexed: 01/05/2023] Open
Abstract
Background Growing evidence suggests the gut microbiota and metabolites in serum or fecal may play a key role in the process of alcohol use disorder (AUD). However, the correlations of gut microbiota and metabolites in both feces and serum in AUD subjects are not well understood. Methods We established a rat model of AUD by a chronic intermittent ethanol voluntary drinking procedure, then the AUD syndromes, the gut microbiota, metabolomic profiling in feces and serum of the rats were examined, and correlations between gut microbiota and metabolites were analyzed. Results Ethanol intake preference increased and maintained at a high level in experimental rats. Anxiety-like behaviors was observed by open field test and elevated plus maze test after ethanol withdraw, indicating that the AUD rat model was successfully developed. The full length 16S rRNA gene sequencing showed AUD significantly changed the β-diversity of gut microbial communities, and significantly decreased the microbial diversity but did not distinctly impact the microbial richness. Microbiota composition significantly changed in AUD rats, such as the abundance of Romboutsia and Turicibacter were significantly increased, whereas uncultured_bacterium_o_Mollicutes_RF39 was decreased. In addition, the untargeted metabolome analysis revealed that many metabolites in both feces and serum were altered in the AUD rats, especially involved in sphingolipid metabolism and glycerophospholipid metabolism pathways. Finally, multiple correlations among AUD behavior, gut microbiota and co-changed metabolites were identified, and the metabolites were directly correlated with the gut microbiota and alcohol preference. Conclusion The altered metabolites in feces and serum are important links between the gut microbiota dysbiosis and alcohol preference in AUD rats, and the altered gut microbiota and metabolites can be potentially new targets for treating AUD.
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Affiliation(s)
- Xiaolong Wang
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Lin Li
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Cong Bian
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Mingjian Bai
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Haitao Yu
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Han Gao
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Jiaxin Zhao
- National and Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, School of Life Sciences, Jilin University, Changchun, China
| | - Chunjing Zhang
- Department of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, China,*Correspondence: Chunjing Zhang,
| | - Rongjie Zhao
- Department of Psychiatry, Qiqihar Medical University, Qiqihar, Heilongjiang, China,Rongjie Zhao,
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44
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Ray SK, Mukherjee S. Neuropharmacology of Alcohol Addiction with Special Emphasis on Proteomic Approaches for Identification of Novel Therapeutic Targets. Curr Neuropharmacol 2023; 21:119-132. [PMID: 35959616 PMCID: PMC10193758 DOI: 10.2174/1570159x20666220811092906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 07/01/2022] [Accepted: 07/10/2022] [Indexed: 02/04/2023] Open
Abstract
Alcohol is a generic pharmacological agent with only a few recognized primary targets. Nmethyl- D-aspartate, gamma-aminobutyric acid, glycine, 5-hydroxytryptamine 3 (serotonin), nicotinic acetylcholine receptors, and L-type Ca2+ channels and G-protein-activated inwardly rectifying K channels are all involved. Following the first hit of alcohol on specific brain targets, the second wave of indirect effects on various neurotransmitter/neuropeptide systems begins, leading to the typical acute behavioral effects of alcohol, which range from disinhibition to sedation and even hypnosis as alcohol concentrations rise. Recent research has revealed that gene regulation is significantly more complex than previously thought and does not fully explain changes in protein levels. As a result, studying the proteome directly, which differs from the genome/transcriptome in terms of complexity and dynamicity, has provided unique insights into extraordinary advances in proteomic techniques that have changed the way we can analyze the composition, regulation, and function of protein complexes and pathways underlying altered neurobiological conditions. Neuroproteomics has the potential to revolutionize alcohol research by allowing researchers to gain a better knowledge of how alcohol impacts protein structure, function, connections, and networks on a global scale. The amount of information collected from these breakthroughs can aid in identifying valuable biomarkers for early detection and improved prognosis of an alcohol use disorder and future pharmaceutical targets for the treatment of alcoholism.
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Affiliation(s)
- Suman Kumar Ray
- Independent Researcher, Bhopal, Madhya Pradesh 462020, India
| | - Sukhes Mukherjee
- Department of Biochemistry, All India Institute of Medical Science, Bhopal, Madhya Pradesh 462020, India
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45
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Grantham EK, Barchiesi R, Salem NA, Mayfield RD. Neuroimmune pathways as targets to reduce alcohol consumption. Pharmacol Biochem Behav 2023; 222:173491. [PMID: 36400266 PMCID: PMC9906983 DOI: 10.1016/j.pbb.2022.173491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 10/04/2022] [Accepted: 11/09/2022] [Indexed: 11/17/2022]
Affiliation(s)
| | - Riccardo Barchiesi
- Waggoner Center for Alcohol and Addiction Research and the Department of Neuroscience, The University of Texas at Austin, Austin, TX, 78712, United States.
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Sodium Butyrate Supplementation Modulates Neuroinflammatory Response Aggravated by Antibiotic Treatment in a Mouse Model of Binge-like Ethanol Drinking. Int J Mol Sci 2022; 23:ijms232415688. [PMID: 36555338 PMCID: PMC9778941 DOI: 10.3390/ijms232415688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 12/06/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
Growing evidence supports the pivotal role of the bidirectional interplay between the gut microbiota and the central nervous system during the progression of alcohol use disorder (AUD). In our previous study, supplementation with sodium butyrate (SB) in C57BL/6J mice prevented increased ethanol consumption in a binge-like drinking paradigm (DID) as a result of treatment with a non-absorbable antibiotic cocktail (ABX). In this study, we tested the hypothesis that SB protection against enhanced ABX-induced ethanol consumption in mice is partially due to modulation of neuroinflammatory responses. Pro- and anti-inflammatory cytokines, as well as changes in microglia and astrocytes were analyzed in hippocampus tissues from ABX-, SB-, ABX+SB-treated mice subjected to 4-week DID. We found that ethanol without or with ABX treatment increased mRNA levels of key brain cytokines (MCP-1, TNF-α, IL-1β, IL-6 and IL-10) while SB supplementation prevented these changes. Additionally, SB supplementation prevented changes in microglia, i.e., increase in Iba-1 positive cell number and morphology, and in astrocytes, i.e., decrease in GFAP-positive cell number, induced by combination of ethanol and ABX treatments. Our results suggest that gut microbiota metabolites can influence drinking behavior by modulation of neuroinflammation, highlighting the potential for microbiome-targeting strategies for treatment or prevention of AUD.
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Barkell GA, Parekh SV, Paniccia JE, Martin AJ, Reissner KJ, Knapp DJ, Robinson SL, Thiele TE, Lysle DT. Chronic ethanol consumption exacerbates future stress-enhanced fear learning, an effect mediated by dorsal hippocampal astrocytes. Alcohol Clin Exp Res 2022; 46:2177-2190. [PMID: 36349797 PMCID: PMC10187052 DOI: 10.1111/acer.14963] [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: 06/23/2022] [Revised: 09/23/2022] [Accepted: 10/21/2022] [Indexed: 11/11/2022]
Abstract
BACKGROUND Alcohol use disorder (AUD) and post-traumatic stress disorder (PTSD) are highly comorbid, yet there is a lack of preclinical research investigating how prior ethanol (EtOH) dependence influences the development of a PTSD-like phenotype. Furthermore, the neuroimmune system has been implicated in the development of both AUD and PTSD, but the extent of glial involvement in this context remains unclear. A rodent model was developed to address this gap in the literature. METHODS We used a 15-day exposure to the 5% w/v EtOH low-fat Lieber-DeCarli liquid diet in combination with the stress-enhanced fear learning (SEFL) paradigm to investigate the effects of chronic EtOH consumption on the development of a PTSD-like phenotype. Next, we used a reverse transcription quantitative real-time polymerase chain reaction to quantify mRNA expression of glial cell markers GFAP (astrocytes) and CD68 (microglia) following severe footshock stress in EtOH-withdrawn rats. Finally, we tested the functional contribution of dorsal hippocampal (DH) astrocytes in the development of SEFL in EtOH-dependent rats using astrocyte-specific Gi designer receptors exclusively activated by designer drugs (Gi -DREADD). RESULTS Results demonstrate that chronic EtOH consumption and withdrawal exacerbate future SEFL. Additionally, we found significantly increased GFAP mRNA expression in the dorsal and ventral hippocampus and amygdalar complex following the severe stressor in EtOH-withdrawn animals. Finally, the stimulation of the astroglial Gi -DREADD during EtOH withdrawal prevented the EtOH-induced enhancement of SEFL. CONCLUSIONS Collectively, results indicate that prior EtOH dependence and withdrawal combined with a severe stressor potentiate future enhanced fear learning. Furthermore, DH astrocytes significantly contribute to this change in behavior. Overall, these studies provide insight into the comorbidity of AUD and PTSD and the potential neurobiological mechanisms behind increased susceptibility to a PTSD-like phenotype in individuals with AUD.
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Affiliation(s)
- Gillian A Barkell
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Shveta V Parekh
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Jacqueline E Paniccia
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Alia J Martin
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Kathryn J Reissner
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Darin J Knapp
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Stacey L Robinson
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Todd E Thiele
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Donald T Lysle
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
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48
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Ferguson LB, Mayfield RD, Messing RO. RNA biomarkers for alcohol use disorder. Front Mol Neurosci 2022; 15:1032362. [PMID: 36407766 PMCID: PMC9673015 DOI: 10.3389/fnmol.2022.1032362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022] Open
Abstract
Alcohol use disorder (AUD) is highly prevalent and one of the leading causes of disability in the US and around the world. There are some molecular biomarkers of heavy alcohol use and liver damage which can suggest AUD, but these are lacking in sensitivity and specificity. AUD treatment involves psychosocial interventions and medications for managing alcohol withdrawal, assisting in abstinence and reduced drinking (naltrexone, acamprosate, disulfiram, and some off-label medications), and treating comorbid psychiatric conditions (e.g., depression and anxiety). It has been suggested that various patient groups within the heterogeneous AUD population would respond more favorably to specific treatment approaches. For example, there is some evidence that so-called reward-drinkers respond better to naltrexone than acamprosate. However, there are currently no objective molecular markers to separate patients into optimal treatment groups or any markers of treatment response. Objective molecular biomarkers could aid in AUD diagnosis and patient stratification, which could personalize treatment and improve outcomes through more targeted interventions. Biomarkers of treatment response could also improve AUD management and treatment development. Systems biology considers complex diseases and emergent behaviors as the outcome of interactions and crosstalk between biomolecular networks. A systems approach that uses transcriptomic (or other -omic data, e.g., methylome, proteome, metabolome) can capture genetic and environmental factors associated with AUD and potentially provide sensitive, specific, and objective biomarkers to guide patient stratification, prognosis of treatment response or relapse, and predict optimal treatments. This Review describes and highlights state-of-the-art research on employing transcriptomic data and artificial intelligence (AI) methods to serve as molecular biomarkers with the goal of improving the clinical management of AUD. Considerations about future directions are also discussed.
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Affiliation(s)
- Laura B. Ferguson
- Waggoner Center for Alcohol and Addiction Research, University of Texas at Austin, Austin, TX, United States,Department of Neurology, Dell Medical School, University of Texas at Austin, Austin, TX, United States,Department of Neuroscience, University of Texas at Austin, Austin, TX, United States,*Correspondence: Laura B. Ferguson,
| | - R. Dayne Mayfield
- Waggoner Center for Alcohol and Addiction Research, University of Texas at Austin, Austin, TX, United States,Department of Neuroscience, University of Texas at Austin, Austin, TX, United States
| | - Robert O. Messing
- Waggoner Center for Alcohol and Addiction Research, University of Texas at Austin, Austin, TX, United States,Department of Neurology, Dell Medical School, University of Texas at Austin, Austin, TX, United States,Department of Neuroscience, University of Texas at Austin, Austin, TX, United States
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Clergue-Duval V, Vrillon A, Jeanblanc J, Questel F, Azuar J, Fouquet G, Mouton-Liger F, Rollet D, Hispard E, Bouaziz-Amar E, Bloch V, Dereux A, Cognat E, Marie-Claire C, Laplanche JL, Bellivier F, Paquet C, Naassila M, Vorspan F. Plasma tau, NfL, GFAP and UCHL1 as candidate biomarkers of alcohol withdrawal-associated brain damage: A pilot study. Addict Biol 2022; 27:e13232. [PMID: 36301211 DOI: 10.1111/adb.13232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 08/24/2022] [Accepted: 08/26/2022] [Indexed: 01/24/2023]
Abstract
In this translational study, we investigated the plasma tau protein, neurofilament light chain (NfL), glial fibrillary acidic protein (GFAP) and ubiquitin carboxy-terminal hydrolase L1 (UCHL1), which are established biomarkers of neurological injury, as predictive biomarkers of alcohol withdrawal-associated brain toxicity. In the clinical study, patients with severe alcohol use disorder (AUD) on D1 of hospitalization for alcohol cessation (AC) (N = 36) were compared to severe AUD patients with at least 3 months of abstinence (N = 16). Overall, patients were 40 men (76.9%), aged 49.8 years [SD ±9.9]. Tau, NfL, GFAP and UCHL1 levels were measured using SIMOA and analysed with a quasipoisson regression model adjusted for age and sex. The NfL level was higher in the AC group (p = 0.013). In the AC group, the tau (p = 0.021) and UCHL1 (p = 0.021) levels were positively associated with the dose of diazepam per weight, and the tau (p = 0.045), NfL (p = 4.9 × 10-3 ) and UCHL1 (p = 0.036) levels were higher in the presence of signs of Wernicke's encephalopathy (n = 9). In the preclinical study, NfL and GFAP levels were assessed in the alcohol deprivation effect (ADE) procedure (N = 17) and control Wistar rats (N = 15). Furthermore, ADE rats were prospectively assessed: after 24 h (T1) and 3 weeks of AC (T2) (paired-samples Wilcoxon and Mann-Whitney tests). The NfL level was higher in the ADE model than in the control rats at both T1 and T2 (p = 0.033 and p = 1.3 × 10-3 ) and higher at T2 than at T1 (p = 0.040). Plasma tau, NfL and UCHL1 are potential biomarkers of brain suffering during alcohol withdrawal.
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Affiliation(s)
- Virgile Clergue-Duval
- Département de Psychiatrie et de Médecine Addictologique, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France.,Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,UFR de Médecine, Université Paris Cité, Paris, France.,Resalcog (Réseau pour la prise en charge des troubles cognitifs liés à l'alcool), Paris, France
| | - Agathe Vrillon
- Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,UFR de Médecine, Université Paris Cité, Paris, France.,Centre de Neurologie Cognitive, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France
| | - Jérôme Jeanblanc
- Inserm UMRS-1247 Groupe de recherche sur l'alcool et les pharmacodépendances, Université de Picardie Jules Verne, Amiens, France.,FHU Améliorer le pronostic des troubles Addictifs et Mentaux par une Médecine Personnalisée (A2M2P), Amiens, France
| | - Frank Questel
- Département de Psychiatrie et de Médecine Addictologique, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France.,Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,Resalcog (Réseau pour la prise en charge des troubles cognitifs liés à l'alcool), Paris, France
| | - Julien Azuar
- Département de Psychiatrie et de Médecine Addictologique, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France.,Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,Resalcog (Réseau pour la prise en charge des troubles cognitifs liés à l'alcool), Paris, France
| | - Grégory Fouquet
- Inserm UMRS-1247 Groupe de recherche sur l'alcool et les pharmacodépendances, Université de Picardie Jules Verne, Amiens, France.,FHU Améliorer le pronostic des troubles Addictifs et Mentaux par une Médecine Personnalisée (A2M2P), Amiens, France
| | - François Mouton-Liger
- Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,UFR de Médecine, Université Paris Cité, Paris, France.,Centre de Neurologie Cognitive, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France
| | - Dorian Rollet
- Département de Psychiatrie et de Médecine Addictologique, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,Resalcog (Réseau pour la prise en charge des troubles cognitifs liés à l'alcool), Paris, France
| | - Eric Hispard
- Département de Psychiatrie et de Médecine Addictologique, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,Resalcog (Réseau pour la prise en charge des troubles cognitifs liés à l'alcool), Paris, France
| | - Elodie Bouaziz-Amar
- Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,Département de Biochimie et Biologie Moléculaire, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France.,UFR de Pharmacie, Université Paris Cité, Paris, France
| | - Vanessa Bloch
- Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,UFR de Pharmacie, Université Paris Cité, Paris, France.,Service de Pharmacie, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France
| | - Alexandra Dereux
- Département de Psychiatrie et de Médecine Addictologique, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France.,Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,Resalcog (Réseau pour la prise en charge des troubles cognitifs liés à l'alcool), Paris, France
| | - Emmanuel Cognat
- Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,UFR de Médecine, Université Paris Cité, Paris, France.,Centre de Neurologie Cognitive, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France
| | - Cynthia Marie-Claire
- Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France
| | - Jean-Louis Laplanche
- Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,Département de Biochimie et Biologie Moléculaire, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France.,UFR de Pharmacie, Université Paris Cité, Paris, France
| | - Frank Bellivier
- Département de Psychiatrie et de Médecine Addictologique, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France.,Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,UFR de Médecine, Université Paris Cité, Paris, France
| | - Claire Paquet
- Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,UFR de Médecine, Université Paris Cité, Paris, France.,Centre de Neurologie Cognitive, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France
| | - Mickael Naassila
- Inserm UMRS-1247 Groupe de recherche sur l'alcool et les pharmacodépendances, Université de Picardie Jules Verne, Amiens, France.,FHU Améliorer le pronostic des troubles Addictifs et Mentaux par une Médecine Personnalisée (A2M2P), Amiens, France.,UFR de Pharmacie, Université de Picardie Jules Verne, Amiens, France
| | - Florence Vorspan
- Département de Psychiatrie et de Médecine Addictologique, APHP GHU Nord, Site Lariboisière Fernand-Widal, Paris, France.,Inserm UMRS-1144 Optimisation thérapeutique en neuropsychopharmacologie, Université Paris Cité, Paris, France.,FHU Network of Research in Substance Use Disorders (NOR-SUD), Paris, France.,UFR de Médecine, Université Paris Cité, Paris, France
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Meredith LR, Green R, Grodin EN, Chorpita M, Miotto K, Ray LA. Ibudilast moderates the effect of mood on alcohol craving during stress exposure. Exp Clin Psychopharmacol 2022; 30:620-631. [PMID: 36102596 PMCID: PMC9484034 DOI: 10.1037/pha0000458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Neuroinflammation is implicated in the development and maintenance of alcohol use disorder (AUD) and neuroimmune therapeutics show promise in treating AUD. Proinflammatory signaling contributes to progressive elevations in the dysfunction of mood and alcohol craving. The current study sought to examine potential biobehavioral mechanisms of neuroimmune modulation in AUD under experimental conditions. In a community sample of individuals with AUD who completed a placebo-controlled crossover trial of ibudilast, we tested the effect of ibudilast on the relationship between mood states and alcohol craving. Multilevel modeling analyses tested the hypothesis that ibudilast would moderate the effect of positive and negative mood states on alcohol craving during stress and cue exposures. Results revealed that after stress-induction, participants' feelings of depression and happiness were more strongly predictive of their craving for alcohol while taking ibudilast as compared with placebo (ps < .03). These results suggest that with neuroimmune modulation, positive and negative mood states may have a stronger influence on one's desire to drink, such that craving may be more mood dependent. No moderating effect of ibudilast on mood states and craving were observed after alcohol cue exposure. Given the potential of anti-inflammatory treatments to reduce depressive symptomatology, this strengthened relationship between mood and craving under ibudilast might reduce the likelihood of stress-related craving and subsequent drinking over time. Moreover, ibudilast may enhance the benefits of happiness, such that maintaining positive mood in the face of acute stress may attenuate craving. Future trials directly testing the clinical implications of these mechanistic findings are warranted. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
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Affiliation(s)
| | - ReJoyce Green
- Department of Psychology, University of California, Los Angeles, CA, USA
| | - Erica N. Grodin
- Department of Psychology, University of California, Los Angeles, CA, USA
| | - Marie Chorpita
- Department of Psychology, University of California, Los Angeles, CA, USA
| | - Karen Miotto
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA, USA
| | - Lara A. Ray
- Department of Psychology, University of California, Los Angeles, CA, USA
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA, USA
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