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Neel AI, Wang Y, Sun H, Liontis KE, McCormack MC, Mayer JC, Cervera Juanes RP, Davenport AT, Grant KA, Daunais JD, Chen R. Differential regulation of G protein-coupled receptor-associated proteins in the caudate and the putamen of cynomolgus macaques following chronic ethanol drinking. J Neurochem 2024. [PMID: 38783749 DOI: 10.1111/jnc.16134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 04/16/2024] [Accepted: 05/08/2024] [Indexed: 05/25/2024]
Abstract
The dorsal striatum is composed of the caudate nucleus and the putamen in human and non-human primates. These two regions receive different cortical projections and are functionally distinct. The caudate is involved in the control of goal-directed behaviors, while the putamen is implicated in habit learning and formation. Previous reports indicate that ethanol differentially influences neurotransmission in these two regions. Because neurotransmitters primarily signal through G protein-coupled receptors (GPCRs) to modulate neuronal activity, the present study aimed to determine whether ethanol had a region-dependent impact on the expression of proteins that are involved in the trafficking and function of GPCRs, including G protein subunits and their effectors, protein kinases, and elements of the cytoskeleton. Western blotting was performed to examine protein levels in the caudate and the putamen of male cynomolgus macaques that self-administered ethanol for 1 year under free access conditions, along with control animals that self-administered an isocaloric sweetened solution under identical operant conditions. Among the 18 proteins studied, we found that the levels of one protein (PKCβ) were increased, and 13 proteins (Gαi1/3, Gαi2, Gαo, Gβ1γ, PKCα, PKCε, CaMKII, GSK3β, β-actin, cofilin, α-tubulin, and tubulin polymerization promoting protein) were reduced in the caudate of alcohol-drinking macaques. However, ethanol did not alter the expression of any proteins examined in the putamen. These observations underscore the unique vulnerability of the caudate nucleus to changes in protein expression induced by chronic ethanol exposure. Whether these alterations are associated with ethanol-induced dysregulation of GPCR function and neurotransmission warrants future investigation.
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Affiliation(s)
- Anna I Neel
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Yutong Wang
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Haiguo Sun
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Katherine E Liontis
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Mary C McCormack
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Jonathan C Mayer
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Rita P Cervera Juanes
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - April T Davenport
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Kathleen A Grant
- Division of Neuroscience Oregon National Primate Research Center, Oregon Health & Science University, Portland, Oregon, USA
| | - James D Daunais
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Rong Chen
- Department of Translational Neuroscience, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
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2
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Yakovlev V, Lapato DM, Rana P, Ghosh P, Frye R, Roberson-Nay R. Neuron enriched extracellular vesicles' MicroRNA expression profiles as a marker of early life alcohol consumption. Transl Psychiatry 2024; 14:176. [PMID: 38575599 PMCID: PMC10994930 DOI: 10.1038/s41398-024-02874-3] [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: 08/14/2023] [Revised: 03/11/2024] [Accepted: 03/13/2024] [Indexed: 04/06/2024] Open
Abstract
Alcohol consumption may impact and shape brain development through perturbed biological pathways and impaired molecular functions. We investigated the relationship between alcohol consumption rates and neuron-enriched extracellular vesicles' (EVs') microRNA (miRNA) expression to better understand the impact of alcohol use on early life brain biology. Neuron-enriched EVs' miRNA expression was measured from plasma samples collected from young people using a commercially available microarray platform while alcohol consumption was measured using the Alcohol Use Disorders Identification Test. Linear regression and network analyses were used to identify significantly differentially expressed miRNAs and to characterize the implicated biological pathways, respectively. Compared to alcohol naïve controls, young people reporting high alcohol consumption exhibited significantly higher expression of three neuron-enriched EVs' miRNAs including miR-30a-5p, miR-194-5p, and miR-339-3p, although only miR-30a-5p and miR-194-5p survived multiple test correction. The miRNA-miRNA interaction network inferred by a network inference algorithm did not detect any differentially expressed miRNAs with a high cutoff on edge scores. However, when the cutoff of the algorithm was reduced, five miRNAs were identified as interacting with miR-194-5p and miR-30a-5p. These seven miRNAs were associated with 25 biological functions; miR-194-5p was the most highly connected node and was highly correlated with the other miRNAs in this cluster. Our observed association between neuron-enriched EVs' miRNAs and alcohol consumption concurs with results from experimental animal models of alcohol use and suggests that high rates of alcohol consumption during the adolescent/young adult years may impact brain functioning and development by modulating miRNA expression.
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Affiliation(s)
- Vasily Yakovlev
- Department of Radiation Oncology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA.
| | - Dana M Lapato
- Department of Human and Molecular Genetics, School of Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | - Pratip Rana
- Department of Computer Science, College of Engineering, Virginia Commonwealth University, Richmond, VA, USA
| | - Preetam Ghosh
- Department of Computer Science, College of Engineering, Virginia Commonwealth University, Richmond, VA, USA
| | - Rebekah Frye
- Neuroscience Program, School of Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | - Roxann Roberson-Nay
- Department of Psychiatry, School of Medicine, Virginia Commonwealth University, Richmond, VA, USA
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3
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Sanz-Martos AB, Fuentes-Verdugo E, Merino B, Morales L, Pérez V, Capellán R, Pellón R, Miguéns M, Del Olmo N. Schedule-induced alcohol intake during adolescence sex dependently impairs hippocampal synaptic plasticity and spatial memory. Behav Brain Res 2023; 452:114576. [PMID: 37423317 DOI: 10.1016/j.bbr.2023.114576] [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: 05/08/2023] [Revised: 06/16/2023] [Accepted: 07/06/2023] [Indexed: 07/11/2023]
Abstract
In a previous study, we demonstrated that intermittent ethanol administration in male adolescent animals impaired hippocampus-dependent spatial memory, particularly under conditions of excessive ethanol administration. In this current study, we subjected adolescent male and female Wistar rats an alcohol schedule-induced drinking (SID) procedure to obtain an elevated rate of alcohol self-administration and assessed their hippocampus-dependent spatial memory. We also studied hippocampal synaptic transmission and plasticity, as well as the expression levels of several genes involved in these mechanisms. Both male and female rats exhibited similar drinking patterns throughout the sessions of the SID protocol reaching similar blood alcohol levels in all the groups. However, only male rats that consumed alcohol showed spatial memory deficits which correlated with inhibition of hippocampal synaptic plasticity as long-term potentiation. In contrast, alcohol did not modify hippocampal gene expression of AMPA and NMDA glutamate receptor subunits, although there are differences in the expression levels of several genes relevant to synaptic plasticity mechanisms underlying learning and memory processes, related to alcohol consumption as Ephb2, sex differences as Pi3k or the interaction of both factors such as Pten. In conclusion, elevated alcohol intake during adolescence seems to have a negative impact on spatial memory and hippocampal synaptic plasticity in a sex dependent manner, even both sexes exhibit similar blood alcohol concentrations and drinking patterns.
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Affiliation(s)
- Ana Belén Sanz-Martos
- Department of Psychobiology, School of Psychology, UNED, C/Juan del Rosal 10, 28040 Madrid, Spain
| | - Esmeralda Fuentes-Verdugo
- Department of Basic Psychology I, School of Psychology, UNED, C/Juan del Rosal 10, 28040 Madrid, Spain
| | - Beatriz Merino
- Department of Pharmaceutical and Nutritional Sciences, School of Pharmacy, San Pablo-CEU University, Urb. Montepríncipe, Boadilla del Monte, Madrid, Spain
| | - Lidia Morales
- Department of Pharmaceutical and Nutritional Sciences, School of Pharmacy, San Pablo-CEU University, Urb. Montepríncipe, Boadilla del Monte, Madrid, Spain
| | - Vicente Pérez
- Department of Basic Psychology I, School of Psychology, UNED, C/Juan del Rosal 10, 28040 Madrid, Spain
| | - Roberto Capellán
- Department of Psychobiology, School of Psychology, UNED, C/Juan del Rosal 10, 28040 Madrid, Spain
| | - Ricardo Pellón
- Department of Basic Psychology I, School of Psychology, UNED, C/Juan del Rosal 10, 28040 Madrid, Spain
| | - Miguel Miguéns
- Department of Basic Psychology I, School of Psychology, UNED, C/Juan del Rosal 10, 28040 Madrid, Spain
| | - Nuria Del Olmo
- Department of Psychobiology, School of Psychology, UNED, C/Juan del Rosal 10, 28040 Madrid, Spain.
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Matthews DB, Scaletty S, Trapp S, Schreiber A, Rossmann G, Imhoff B, Petersilka Q, Kastner A, Pauly J, Nixon K. Chronic intermittent ethanol exposure during adolescence produces sex- and age-dependent changes in anxiety and cognition without changes in microglia reactivity late in life. Front Behav Neurosci 2023; 17:1223883. [PMID: 37589035 PMCID: PMC10427154 DOI: 10.3389/fnbeh.2023.1223883] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/18/2023] [Indexed: 08/18/2023] Open
Abstract
Binge-like ethanol exposure during adolescence has been shown to produce long lasting effects in animal models including anxiety-like behavior that can last into young adulthood and impairments in cognition that can last throughout most of the lifespan. However, little research has investigated if binge-like ethanol exposure during adolescence produces persistent anxiety-like behavior and concomitantly impairs cognition late in life. Furthermore, few studies have investigated such behavioral effects in both female and male rats over the lifespan. Finally, it is yet to be determined if binge-like ethanol exposure during adolescence alters microglia activation in relevant brain regions late in life. In the present study female and male adolescent rats were exposed to either 3.0 or 5.0 g/kg ethanol, or water control, in a chronic intermittent pattern before being tested in the elevated plus maze and open field task over the next ∼18 months. Animals were then trained in a spatial reference task via the Morris water maze before having their behavioral flexibility tested. Finally, brains were removed, sectioned and presumptive microglia activation determined using autoradiography for [3H]PK11195 binding. Males, but not females, displayed an anxiety-like phenotype initially following the chronic intermittent ethanol exposure paradigm which resolved in adulthood. Further, males but not females had altered spatial reference learning and impaired behavioral flexibility late in life. Conversely, [3H]PK11195 binding was significantly elevated in females compared to males late in life and the level of microglia activation interacted as a function of sex and brain regions, but there was no long-term outcome related to adolescent alcohol exposure. These data further confirm that binge-like ethanol exposure during adolescence produces alterations in behavior that can last throughout the lifespan. In addition, the data suggest that microglia activation late in life is not exacerbated by prior binge-like ethanol exposure during adolescence but the expression is sex- and brain region-dependent across the lifespan.
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Affiliation(s)
- Douglas B. Matthews
- Department of Psychology, University of Wisconsin–Eau Claire, Eau Claire, WI, United States
| | - Samantha Scaletty
- Department of Psychology, University of Wisconsin–Eau Claire, Eau Claire, WI, United States
| | - Sarah Trapp
- Department of Psychology, University of Wisconsin–Eau Claire, Eau Claire, WI, United States
| | - Areonna Schreiber
- Department of Psychology, University of Wisconsin–Eau Claire, Eau Claire, WI, United States
| | - Gillian Rossmann
- Department of Psychology, University of Wisconsin–Eau Claire, Eau Claire, WI, United States
| | - Bailey Imhoff
- Department of Psychology, University of Wisconsin–Eau Claire, Eau Claire, WI, United States
| | - Quinn Petersilka
- Department of Psychology, University of Wisconsin–Eau Claire, Eau Claire, WI, United States
| | - Abigail Kastner
- Department of Psychology, University of Wisconsin–Eau Claire, Eau Claire, WI, United States
| | - Jim Pauly
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, United States
| | - Kimberly Nixon
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Austin, TX, United States
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5
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Yakovlev V, Lapato DM, Rana P, Ghosh P, Frye R, Roberson-Nay R. Neuron Enriched Exosomal MicroRNA Expression Profiles as a Marker of Early Life Alcohol Consumption. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.09.544235. [PMID: 37333185 PMCID: PMC10274862 DOI: 10.1101/2023.06.09.544235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Background Alcohol consumption may impact and shape brain development through perturbed biological pathways and impaired molecular functions. We investigated the relationship between alcohol consumption rates and neuron-enriched exosomal microRNA (miRNA) expression to better understand the impact of alcohol use on early life brain biology. Methods Neuron-enriched exosomal miRNA expression was measured from plasma samples collected from young people using a commercially available microarray platform while alcohol consumption was measured using the Alcohol Use Disorders Identification Test. Linear regression and network analyses were used to identify significantly differentially expressed miRNAs and to characterize the implicated biological pathways, respectively. Results Compared to alcohol naïve controls, young people reporting high alcohol consumption exhibited significantly higher expression of four neuron-enriched exosomal miRNAs including miR-30a-5p, miR-194-5p, and miR-339-3p, although only miR-30a-5p and miR-194-5p survived multiple test correction. The miRNA-miRNA interaction network inferred by a network inference algorithm did not detect any differentially expressed miRNAs with a high cutoff on edge scores. However, when the cutoff of the algorithm was reduced, five miRNAs were identified as interacting with miR-194-5p and miR-30a-5p. These seven miRNAs were associated with 25 biological functions; miR-194-5p was the most highly connected node and was highly correlated with the other miRNAs in this cluster. Conclusions Our observed association between neuron-enriched exosomal miRNAs and alcohol consumption concurs with results from experimental animal models of alcohol use and suggests that high rates of alcohol consumption during the adolescent/young adult years may impact brain functioning and development by modulating miRNA expression.
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Affiliation(s)
- Vasily Yakovlev
- Department of Radiation Oncology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA
| | - Dana M Lapato
- Department of Human and Molecular Genetics, School of Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | | | - Preetam Ghosh
- Department of Computer Science, College of Engineering, Virginia Commonwealth University, Richmond, VA, USA
| | - Rebekah Frye
- Neuroscience Program, School of Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | - Roxann Roberson-Nay
- Department of Psychiatry, School of Medicine, Virginia Commonwealth University, Richmond, VA, USA
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Jiao Y, Zhao Z, Li X, Li L, Xiao D, Wan S, Wu T, Li T, Li P, Zhao R. Salidroside ameliorates memory impairment following long-term ethanol intake in rats by modulating the altered intestinal microbiota content and hippocampal gene expression. Front Microbiol 2023; 14:1172936. [PMID: 37362918 PMCID: PMC10288325 DOI: 10.3389/fmicb.2023.1172936] [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: 02/24/2023] [Accepted: 05/22/2023] [Indexed: 06/28/2023] Open
Abstract
Background Salidroside (Sal), the main component of a famous herb Rhodiola rosea L, enhances memory performance and reduces fatigue. Therefore, this study assessed the effect of Sal on memory impairment induced by a long-term intake of ethanol (EtOH) in rats and investigated its relevant mechanisms using gut microbiota metagenomic analysis and hippocampal transcriptomic analysis. Methods Eighteen male SD rats were divided into the normal control group (CON group), EtOH model group (Model group), and Sal treatment group (Sal group). The rats in the Model and Sal groups intragastrically (i.g.) received 2 g/kg EtOH for 30 consecutive days, whereas the CON group was given an equal volume of distilled water. Meanwhile, the rats in the Sal group were administered i.g. 30 mg/kg Sal 60 min after EtOH intake. All rats were tested in the eight-arm maze for their memory function every 3 days. On the 30th day, metagenomic analyses of gut microbiota and transcriptomic analyses of the hippocampus were performed. Results Compared with the Model group, Sal treatment reduced the total time to complete the eight-arm maze task, decreased the number of arm entries, and abated the working memory error that was significant from the 9th day. Additionally, Sal intervention improved the gut microbiota composition, such as the increased abundance of Actinobacteria and Bifidobacterium, which was related to the metabolism of amino acids and terpenoid carbohydrate, endocrine function, and signal transduction by neurotransmitters. In the hippocampus, the EtOH intake differentially expressed 68 genes (54 genes increased, whereas 14 genes decreased), compared with the CON group, whereas Sal intervention affected these changes: 15 genes increased whereas 11 genes decreased. And, enrichment analyses revealed these genes were related to the structural components of the ribosome, mRNA splicing process, protein translation, mitochondria function, and immunological reaction. Finally, a correlation analysis found the memory impairment was positively correlated with the abnormal upregulation of Tomm7 but negatively correlated with decreased abundance of gut Alistipes_indistinctus, Lactobacillus_taiwanensis, Lactobacillus_paragasseri, and Lactobacillus johnsonii. Conclusion Sal improved memory impairment caused by long-term EtOH intake in rats, which may be related to its regulation of gut dysbiosis and hippocampal dysfunction.
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Affiliation(s)
- Yu Jiao
- Department of Psychiatry, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Zhenglin Zhao
- Department of Biochemistry, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Xin Li
- Department of Psychiatry, The Fourth Affiliated Hospital of Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Lulu Li
- Department of Biochemistry, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Dan Xiao
- School of Medicine and Health, Harbin Institute of Technology, Harbin, Heilongjiang, China
- Department of Medicine and Health, Zhengzhou Research Institute of Harbin Institute of Technology, Zhengzhou, Henan, China
| | - Siyuan Wan
- Department of Preventive Medicine, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Tong Wu
- Department of Psychiatry, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Tong Li
- Department of Psychiatry, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Ping Li
- Department of Psychiatry, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Rongjie Zhao
- Department of Psychiatry, Qiqihar Medical University, Qiqihar, Heilongjiang, China
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7
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Brocato ER, Wolstenholme JT. Adolescent binge ethanol impacts H3K36me3 regulation of synaptic genes. Front Mol Neurosci 2023; 16:1082104. [PMID: 36937047 PMCID: PMC10020663 DOI: 10.3389/fnmol.2023.1082104] [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: 10/27/2022] [Accepted: 02/10/2023] [Indexed: 03/06/2023] Open
Abstract
Adolescence is marked in part by the ongoing development of the prefrontal cortex (PFC). Binge ethanol use during this critical stage in neurodevelopment induces significant structural changes to the PFC, as well as cognitive and behavioral deficits that can last into adulthood. Previous studies showed that adolescent binge ethanol causes lasting deficits in working memory, decreases in the expression of chromatin remodeling genes responsible for the methylation of histone 3 lysine 36 (H3K36), and global decreases in H3K36 in the PFC. H3K36me3 is present within the coding region of actively-transcribed genes, and safeguards against aberrant, cryptic transcription by RNA Polymerase II. We hypothesize that altered methylation of H3K36 could play a role in adolescent binge ethanol-induced memory deficits. To investigate this at the molecular level, ethanol (4 g/kg, i.g.) or water was administered intermittently to adolescent mice. RNA-and ChIP-sequencing were then performed within the same tissue to determine gene expression changes and identify genes and loci where H3K36me3 was disrupted by ethanol. We further assessed ethanol-induced changes at the transcription level with differential exon-use and cryptic transcription analysis - a hallmark of decreased H3K36me3. Here, we found ethanol-induced changes to the gene expression and H3K36me3-regulation of synaptic-related genes in all our analyses. Notably, H3K36me3 was differentially trimethylated between ethanol and control conditions at synaptic-related genes, and Snap25 and Cplx1 showed evidence of cryptic transcription in males and females treated with ethanol during adolescence. Our results provide preliminary evidence that ethanol-induced changes to H3K36me3 during adolescent neurodevelopment may be linked to synaptic dysregulation at the transcriptional level, which may explain the reported ethanol-induced changes to PFC synaptic function.
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Affiliation(s)
- Emily R. Brocato
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, United States
| | - Jennifer T. Wolstenholme
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, United States
- VCU Alcohol Research Center, Virginia Commonwealth University, Richmond, VA, United States
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8
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Gore-Langton JK, Varlinskaya EI, Werner DF. Ethanol-induced conditioned taste aversion and associated neural activation in male rats: Impact of age and adolescent intermittent ethanol exposure. PLoS One 2022; 17:e0279507. [PMID: 36548243 PMCID: PMC9778589 DOI: 10.1371/journal.pone.0279507] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 12/08/2022] [Indexed: 12/24/2022] Open
Abstract
Individuals that initiate alcohol use at younger ages and binge drink during adolescence are more susceptible to developing alcohol use disorder. Adolescents are relatively insensitive to the aversive effects of alcohol and tend to consume significantly more alcohol per occasion than adults, an effect that is conserved in rodent models. Adolescent typical insensitivity to the aversive effects of alcohol may promote greater alcohol intake by attenuating internal cues that curb its consumption. Attenuated sensitivity to the aversive effects of alcohol is also retained into adulthood following protracted abstinence from adolescent intermittent ethanol (AIE) exposure. Despite these effects, much remains unknown regarding the neural contributors. In the present study, we used a conditioned taste aversion (CTA) paradigm to investigate neuronal activation in late-developing forebrain structures of male adolescents and adult cFos-LacZ transgenic rats as well as in AIE adults following consumption of 0.9% sodium chloride previously paired with an intraperitoneal injection of 0, 1.5 or 2.5 g/kg of ethanol. Adults that were non-manipulated or received water exposure during adolescence showed CTA to both ethanol doses, whereas adolescents displayed CTA only to the 2.5 g/kg ethanol dose. Adults who experienced AIE did not show CTA. Adults displayed increased neuronal activation indexed via number of β-galactosidase positive (β-gal+) cells in the prefrontal and insular cortex that was absent in adolescents, whereas adolescents but not adults had a reduced number of β-gal+ cells in the central amygdala. Adults also displayed greater cortical-insular functional connectivity than adolescents as well as insular-amygdalar and prefrontal cortex-accumbens core functional connectivity. Like adolescents, adults previously exposed to AIE displayed reduced prefrontal-insular cortex and prefrontal-accumbal core functional connectivity. Taken together, these results suggest that attenuated sensitivity to the aversive effects of ethanol is related to a loss of an insular-prefrontal cortex-accumbens core circuit.
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Affiliation(s)
- Jonathan K. Gore-Langton
- Center for Development and Behavioral Neuroscience, Binghamton University, Binghamton, New York, United States of America
- Department of Psychology, Binghamton University, Binghamton, New York, United States of America
| | - Elena I. Varlinskaya
- Center for Development and Behavioral Neuroscience, Binghamton University, Binghamton, New York, United States of America
- Department of Psychology, Binghamton University, Binghamton, New York, United States of America
- Developmental Exposure Alcohol Research Center, Binghamton, New York, United States of America
| | - David F. Werner
- Center for Development and Behavioral Neuroscience, Binghamton University, Binghamton, New York, United States of America
- Department of Psychology, Binghamton University, Binghamton, New York, United States of America
- Developmental Exposure Alcohol Research Center, Binghamton, New York, United States of America
- * E-mail:
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9
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Ho AMC, Peyton MP, Scaletty SJ, Trapp S, Schreiber A, Madden BJ, Choi DS, Matthews DB. Chronic Intermittent Ethanol Exposure Alters Behavioral Flexibility in Aged Rats Compared to Adult Rats and Modifies Protein and Protein Pathways Related to Alzheimer's Disease. ACS OMEGA 2022; 7:46260-46276. [PMID: 36570296 PMCID: PMC9774340 DOI: 10.1021/acsomega.2c04528] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 11/17/2022] [Indexed: 05/13/2023]
Abstract
Repeated excessive alcohol consumption increases the risk of developing cognitive decline and dementia. Hazardous drinking among older adults further increases such vulnerabilities. To investigate whether alcohol induces cognitive deficits in older adults, we performed a chronic intermittent ethanol exposure paradigm (ethanol or water gavage every other day 10 times) in 8-week-old young adult and 70-week-old aged rats. While spatial memory retrieval ascertained by probe trials in the Morris water maze was not significantly different between ethanol-treated and water-treated rats in both age groups after the fifth and tenth gavages, behavioral flexibility was impaired in ethanol-treated rats compared to water-treated rats in the aged group but not in the young adult group. We then examined ethanol-treatment-associated hippocampal proteomic and phosphoproteomic differences distinct in the aged rats. We identified several ethanol-treatment-related proteins, including the upregulations of the Prkcd protein level, several of its phosphosites, and its kinase activity and downregulation in the Camk2a protein level. Our bioinformatic analysis revealed notable changes in pathways involved in neurotransmission regulation, synaptic plasticity, neuronal apoptosis, and insulin receptor signaling. In conclusion, our behavioral and proteomic results identified several candidate proteins and pathways potentially associated with alcohol-induced cognitive decline in aged adults.
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Affiliation(s)
- Ada Man-Choi Ho
- Department
of Psychiatry and Psychology, Mayo Clinic, Rochester, Minnesota55905, United States
| | - Mina P. Peyton
- Bioinformatics
and Computational Biology Program, University
of Minnesota, Minneapolis, Minnesota55455, United States
| | - Samantha J. Scaletty
- Department
of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota55905, United States
| | - Sarah Trapp
- Department
of Psychology, University of Wisconsin—Eau
Claire, Eau Claire, Wisconsin54701, United States
| | - Areonna Schreiber
- Department
of Psychology, University of Wisconsin—Eau
Claire, Eau Claire, Wisconsin54701, United States
| | - Benjamin J. Madden
- Mayo
Clinic Proteomics Core, Mayo Clinic, Rochester, Minnesota55905, United States
| | - Doo-Sup Choi
- Department
of Psychiatry and Psychology, Mayo Clinic, Rochester, Minnesota55905, United States
- Department
of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota55905, United States
| | - Douglas B. Matthews
- Department
of Psychology, University of Wisconsin—Eau
Claire, Eau Claire, Wisconsin54701, United States
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10
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Obray JD, Landin JD, Vaughan DT, Scofield MD, Chandler LJ. Adolescent alcohol exposure reduces dopamine 1 receptor modulation of prelimbic neurons projecting to the nucleus accumbens and basolateral amygdala. ADDICTION NEUROSCIENCE 2022; 4:100044. [PMID: 36643604 PMCID: PMC9836047 DOI: 10.1016/j.addicn.2022.100044] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Binge drinking during adolescence is highly prevalent despite increasing evidence of its long-term impact on behaviors associated with modulation of behavioral flexibility by the medial prefrontal cortex (mPFC). In the present study, male and female rats underwent adolescent intermittent ethanol (AIE) exposure by vapor inhalation. After aging to adulthood, retrograde bead labelling and viral tagging were used to identify populations of neurons in the prelimbic region (PrL) of the mPFC that project to specific subcortical targets. Electrophysiological recording from bead-labelled neurons in PrL slices revealed that AIE did not alter the intrinsic excitability of PrL neurons that projected to either the NAc or the BLA. Similarly, recordings of spontaneous inhibitory and excitatory post-synaptic currents revealed no AIE-induced changes in synaptic drive onto either population of projection neurons. In contrast, AIE exposure was associated with a loss of dopamine receptor 1 (D1), but no change in dopamine receptor 2 (D2), modulation of evoked firing of both populations of projection neurons. Lastly, confocal imaging of proximal and apical dendritic tufts of viral-labelled PrL neurons that projected to the nucleus accumbens (NAc) revealed AIE did not alter the density of dendritic spines. Together, these observations provide evidence that AIE exposure results in disruption of D1 receptor modulation of PrL inputs to at least two major subcortical target regions that have been implicated in AIE-induced long-term changes in behavioral control.
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Affiliation(s)
- J. Daniel Obray
- Department of Neuroscience, Medical University of South Carolina, 30 Courtenay Drive, Charleston SC 29425, USA
| | - Justine D. Landin
- Department of Neuroscience, Medical University of South Carolina, 30 Courtenay Drive, Charleston SC 29425, USA
| | - Dylan T. Vaughan
- Department of Neuroscience, Medical University of South Carolina, 30 Courtenay Drive, Charleston SC 29425, USA
| | - Michael D. Scofield
- Department of Neuroscience, Medical University of South Carolina, 30 Courtenay Drive, Charleston SC 29425, USA,Department of Anesthesiology, Medical University of South Carolina, Charleston SC, USA
| | - L. Judson Chandler
- Department of Neuroscience, Medical University of South Carolina, 30 Courtenay Drive, Charleston SC 29425, USA,Corresponding author. (L.J. Chandler)
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11
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Cognitive Sequelae and Hippocampal Dysfunction in Chronic Kidney Disease following 5/6 Nephrectomy. Brain Sci 2022; 12:brainsci12070905. [PMID: 35884712 PMCID: PMC9321175 DOI: 10.3390/brainsci12070905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 06/30/2022] [Accepted: 07/06/2022] [Indexed: 01/18/2023] Open
Abstract
Neurological disorders are prevalent in patients with chronic kidney disease (CKD). Vascular factors and uremic toxins are involved with cognitive impairment in CKD. In addition, vascular dementia-induced alterations in the structure and function of the hippocampus can lead to deficits in hippocampal synaptic plasticity and cognitive function. However, regardless of this clinical evidence, the pathophysiology of cognitive impairment in patients with CKD is not fully understood. We used male Sprague Dawley rats and performed 5/6 nephrectomy to observe the changes in behavior, field excitatory postsynaptic potential, and immunostaining of the hippocampus following CKD progression. We measured the hippocampus volume on magnetic resonance imaging scans in the controls (n = 34) and end-stage renal disease (ESRD) hemodialysis patients (n = 42). In four cognition-related behavior assays, including novel object recognition, Y-maze, Barnes maze, and classical contextual fear conditioning, we identified deficits in spatial working memory, learning and memory, and contextual memory, as well as the ability to distinguish familiar and new objects, in the rats with CKD. Immunohistochemical staining of Na+/H+ exchanger1 was increased in the hippocampus of the CKD rat models. We performed double immunofluorescent staining for aquaporin-4 and glial fibrillary acidic protein and then verified the high coexpression in the hippocampus of the CKD rat model. Furthermore, results from recoding of the field excitatory postsynaptic potential (fEPSP) in the hippocampus showed the reduced amplitude and slope of fEPSP in the CKD rats. ESRD patients with cognitive impairment showed a significant decrease in the hippocampus volume compared with ESRD patients without cognitive impairment or the controls. Our findings suggest that uremia resulting from decreased kidney function may cause the destruction of the blood–brain barrier and hippocampus-related cognitive impairment in CKD.
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12
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Chronic Intermittent Ethanol Administration during Adolescence Produces Sex Dependent Impairments in Behavioral Flexibility and Survivability. Brain Sci 2022; 12:brainsci12050606. [PMID: 35624993 PMCID: PMC9139058 DOI: 10.3390/brainsci12050606] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/23/2022] [Accepted: 04/24/2022] [Indexed: 12/10/2022] Open
Abstract
Chronic intermittent ethanol exposure during adolescence produces behavioral impairments and neurobiological changes that can last into young adulthood. One such behavioral impairment is reduced behavioral flexibility, a behavioral impairment that has been correlated with the risk for increased ethanol intake. In the current study, we investigated if chronic intermittent ethanol exposure during adolescence alters cognition, including behavioral flexibility, over a 22-month testing period. Female and male rats were treated with either 3.0 g/kg or 5.0 g/kg ethanol via gavage in a chronic intermittent fashion during adolescence and then tested every 4 to 5 months on a series of cognitive measures in the Morris water maze. Chronic intermittent ethanol selectively impaired behavioral flexibility in both female and male rats, although the pattern of results was different as a function of sex. In addition, female, but not male, rats were impaired in a short-term relearning test. Finally, male rats administered ethanol during adolescence were significantly more likely to not survive the 22-month experiment compared to female rats administered ethanol during adolescence. The current results demonstrate that adolescence is a unique period of development where chronic intermittent ethanol exposure produces long-lasting, selective cognitive impairments across the lifespan.
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13
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Sampedro‐Piquero P, Moreno‐Fernández RD, Begega A, López M, Santín LJ. Long-term consequences of alcohol use in early adolescent mice: Focus on neuroadaptations in GR, CRF and BDNF. Addict Biol 2022; 27:e13158. [PMID: 35229955 DOI: 10.1111/adb.13158] [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: 09/15/2021] [Revised: 01/11/2022] [Accepted: 01/26/2022] [Indexed: 01/04/2023]
Abstract
Our aim was to assess the cognitive and emotional state, as well as related-changes in the glucocorticoid receptor (GR), the corticotropin-releasing factor (CRF) and the brain-derived neurotrophic factor (BDNF) expression of adolescent C57BL/6J male mice after a 5-week two-bottle choice protocol (postnatal day [pd]21 to pd52). Additionally, we wanted to analyse whether the behavioural and neurobiological effects observed in late adolescence (pd62) lasted until adulthood (pd84). Behavioural testing revealed that alcohol during early adolescence increased anxiety-like and compulsive-related behaviours, which was maintained in adulthood. Concerning cognition, working memory was only altered in late adolescent mice, whereas object location test performance was impaired in both ages. In contrast, novel object recognition remained unaltered. Immunohistochemical analysis showed that alcohol during adolescence diminished BDNF+ cells in the cingulate cortex, the hippocampal CA1 layer and the central amygdala. Regarding hypothalamic-pituitary-adrenal axis (HPA) functioning, alcohol abuse increased the GR and CRF expression in the hypothalamic paraventricular nucleus and the central amygdala. Besides this, GR density was also higher in the prelimbic cortex and the basolateral amygdala, regardless of the animals' age. Our findings suggest that adolescent alcohol exposure led to long-term behavioural alterations, along with changes in BDNF, GR and CRF expression in limbic brain areas involved in stress response, emotional regulation and cognition.
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Affiliation(s)
- Patricia Sampedro‐Piquero
- Departamento de Psicología Biológica y de la Salud, Facultad de Psicología Universidad Autónoma de Madrid Madrid Spain
| | | | - Azucena Begega
- Departamento de Psicología, Facultad de Psicología Universidad de Oviedo Oviedo Spain
| | - Matías López
- Departamento de Psicología, Facultad de Psicología Universidad de Oviedo Oviedo Spain
| | - Luis J. Santín
- Departamento de Psicobiología y Metodología de las Ciencias del Comportamiento, Facultad de Psicología Universidad de Málaga Málaga Spain
- Neuroimmunology and NeuroInflammation Department Instituto de Investigación Biomédica de Málaga‐IBIMA Málaga Spain
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14
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Li X, Chen LM, Kumar G, Zhang SJ, Zhong QH, Zhang HY, Gui G, Wu LL, Fan HZ, Sheng JW. Therapeutic Interventions of Gut-Brain Axis as Novel Strategies for Treatment of Alcohol Use Disorder Associated Cognitive and Mood Dysfunction. Front Neurosci 2022; 16:820106. [PMID: 35185459 PMCID: PMC8847450 DOI: 10.3389/fnins.2022.820106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 01/10/2022] [Indexed: 11/25/2022] Open
Abstract
Alcohol use disorders (AUD) is characterized by persistent or intermittent alcohol cravings and compulsive drinking. The functional changes in the central nervous system (CNS) after alcohol consumption are alcohol-associated cognitive impairment and mood disorders, which are major health issues reported in AUDs. Studies have shown that transferring the intestinal microbiota from AUDs patients to germ-free animals causes learning and memory dysfunction, depression and anxiety-like behavior, indicating the vital role of intestinal microbiota in development of neuropsychiatric disorders in AUD. Intestinal flora composition of AUD patients are significantly different from normal people, suggesting that intestinal flora imbalance orchestrate the development of neuropsychiatric disorders in AUD. Studies suggests that gut microbiome links bidirectional signaling network of the enteric nervous system (ENS) to central nervous system (CNS), forming gut-microbe-brain axis (brain-gut axis). In this review, we discussed pathogenesis and possible treatment of AUD-induced cognitive deficits, anxiety, and depression disorders. Further, we described the mechanism of intestinal flora imbalance and dysfunction of hippocampus-amygdala-frontal cortex (gut-limbic circuit system dysfunction). Therefore, we postulate therapeutic interventions of gut-brain axis as novel strategies for treatment of AUD-induced neuropsychiatric disorders.
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Affiliation(s)
- Xin Li
- Department of Gastroenterology, The People’s Hospital of Zhangshu City, Jiangxi, China
| | - Le-Mei Chen
- Department of Pharmacy, Guangdong Provincial People’s Hospital Ganzhou Hospital, Ganzhou Municipal Hospital, Jiangxi, China
| | - Gajendra Kumar
- Department of Neuroscience, City University of Hong Kong, Kowloon Tong, Hong Kong SAR, China
| | - Shan-Jin Zhang
- Department of Gastroenterology, The People’s Hospital of Yichun City, Jiangxi, China
| | - Quan-hai Zhong
- School of Chemistry and Bioengineering, Yichun University, Jiangxi, China
| | - Hong-Yan Zhang
- School of Chemistry and Bioengineering, Yichun University, Jiangxi, China
| | - Guan Gui
- Department of Gastroenterology, The People’s Hospital of Yichun City, Jiangxi, China
| | - Lv-Le Wu
- Department of Gastroenterology, The People’s Hospital of Yichun City, Jiangxi, China
| | - Hui-Zhen Fan
- Department of Gastroenterology, The People’s Hospital of Yichun City, Jiangxi, China
- School of Chemistry and Bioengineering, Yichun University, Jiangxi, China
- *Correspondence: Hui-Zhen Fan,
| | - Jian-Wen Sheng
- Department of Gastroenterology, The People’s Hospital of Yichun City, Jiangxi, China
- Jian-Wen Sheng,
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15
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Monleón S, Gómez J, Duque A, Vinader-Caerols C. Effects of binge drinking and the anti-inflammatory drug indomethacin on spatial memory and cognitive flexibility in mice. Behav Brain Res 2022; 417:113619. [PMID: 34619248 DOI: 10.1016/j.bbr.2021.113619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/28/2021] [Accepted: 10/01/2021] [Indexed: 01/15/2023]
Abstract
In previous research, we found that chronic-intermittent ethanol administration (CIEA), a model of binge drinking, impaired emotional memory in mice, and this impairment was counteracted by the anti-inflammatory drug indomethacin. In the present study, we evaluated the effects of CIEA on spatial memory and cognitive flexibility in adolescent mice of both sexes. Animals were randomly assigned to one of four groups for each sex: SS (saline + saline), SA (saline + alcohol), SI (saline + indomethacin), and AI (alcohol + indomethacin). They were injected with saline, ethanol (3 g/kg) or indomethacin (10 mg/kg) for the first three days of each week, throughout three weeks. 96 h after treatment, subjects learnt a standard water maze task on five consecutive days (4-day training and 1-day probe trial). One day later, mice underwent a reversal task for evaluating spatial cognitive flexibility. Animals receiving alcohol (SA and AI groups) did not differ from controls (SS groups) during the standard task, but animals treated with indomethacin performed better than controls, both in the acquisition trials and the probe trial. During the reversal task, no significant differences between alcohol groups and controls were observed, but the indomethacin group showed significant lower escape latencies than controls. No sex differences were found in either task. In conclusion, binge drinking does not impair spatial memory or spatial cognitive flexibility, while the anti-inflammatory indomethacin improves both, showing that the effects of alcohol and indomethacin on spatial memory (dependent on hippocampus) are different to those they exert on emotional memory (dependent on amygdala).
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Affiliation(s)
- Santiago Monleón
- Department of Psychobiology, University of Valencia, Valencia, Spain.
| | - Javier Gómez
- Department of Psychobiology, University of Valencia, Valencia, Spain
| | - Aránzazu Duque
- Department of Psychology, Universidad Internacional de Valencia, Valencia, Spain
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16
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Matthews DB, Imhoff BM. Age modifies the effect of ethanol on behavior: Investigations in adolescent, adult and aged rats. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2021; 161:251-275. [PMID: 34801171 DOI: 10.1016/bs.irn.2021.06.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The number of older people is increasing in most if not all countries in the world. In addition, the amount of alcohol consumption in the aged population is increasing and the consumption pattern is often in a binge fashion. However, little is known if the effects of alcohol, either acute or chronic exposure, vary in the older population compared to younger populations. The current mini-review will provide an overview of the effects of acute and chronic ethanol exposure at three different periods of development: adolescent, adult and aged on multiple different commonly studied behaviors. The overall conclusion is that biological age of the subject is a critical factor in understanding the effects of ethanol across the lifespan.
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Affiliation(s)
- D B Matthews
- Department of Psychology, University of Wisconsin - Eau Claire, Eau Claire, WI, United States.
| | - B M Imhoff
- Department of Psychology, University of Wisconsin - Eau Claire, Eau Claire, WI, United States
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17
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Saturated and unsaturated fat diets impair hippocampal glutamatergic transmission in adolescent mice. Psychoneuroendocrinology 2021; 133:105429. [PMID: 34624673 DOI: 10.1016/j.psyneuen.2021.105429] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 09/10/2021] [Accepted: 09/20/2021] [Indexed: 11/22/2022]
Abstract
Consumption of high-fat diets (HFD) has been associated with neuronal plasticity deficits and cognitive disorders linked to the alteration of glutamatergic disorders in the hippocampus. As young individuals are especially vulnerable to the effects of nutrients and xenobiotics on cognition, we studied the effect of chronic consumption of saturated (SOLF) and unsaturated oil-enriched foods (UOLF) on: i) spatial memory; ii) hippocampal synaptic transmission and plasticity; and iii) gene expression of glutamatergic receptors and hormone receptors in the hippocampus of adolescent and adult mice. Our results show that both SOLF and UOLF impair spatial short-term memory. Accordingly, hippocampal synaptic plasticity mechanisms underlying memory, and gene expression of NMDA receptor subunits are modulated by both diets. On the other hand, PPARγ gene expression is specifically down-regulated in adolescent SOLF individuals and up-regulated in adult UOLF mice.
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18
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Robinson DL, Amodeo LR, Chandler LJ, Crews FT, Ehlers CL, Gómez-A A, Healey KL, Kuhn CM, Macht VA, Marshall SA, Swartzwelder HS, Varlinskaya EI, Werner DF. The role of sex in the persistent effects of adolescent alcohol exposure on behavior and neurobiology in rodents. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2021; 160:305-340. [PMID: 34696877 DOI: 10.1016/bs.irn.2021.07.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Alcohol drinking is often initiated during adolescence, and this frequently escalates to binge drinking. As adolescence is also a period of dynamic neurodevelopment, preclinical evidence has highlighted that some of the consequences of binge drinking can be long lasting with deficits persisting into adulthood in a variety of cognitive-behavioral tasks. However, while the majority of preclinical work to date has been performed in male rodents, the rapid increase in binge drinking in adolescent female humans has re-emphasized the importance of addressing alcohol effects in the context of sex as a biological variable. Here we review several of the consequences of adolescent ethanol exposure in light of sex as a critical biological variable. While some alcohol-induced outcomes, such as non-social approach/avoidance behavior and sleep disruption, are generally consistent across sex, others are variable across sex, such as alcohol drinking, sensitivity to ethanol, social anxiety-like behavior, and induction of proinflammatory markers.
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Affiliation(s)
- Donita L Robinson
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.
| | - Leslie R Amodeo
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Department of Psychology, California State University, San Bernardino, CA, United States
| | - L Judson Chandler
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Department of Neuroscience, Medical University of South Carolina, Charleston, SC, United States
| | - Fulton T Crews
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Cindy L Ehlers
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Department of Neuroscience, Scripps Research, La Jolla, CA, United States
| | - Alexander Gómez-A
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Kati L Healey
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Department of Psychiatry and Behavioral Sciences, School of Medicine, Duke University, Durham, NC, United States
| | - Cynthia M Kuhn
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Department of Pharmacology and Cancer Biology, School of Medicine, Duke University, Durham, NC, United States
| | - Victoria A Macht
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - S Alexander Marshall
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Biological and Biomedical Sciences Department, North Carolina Central University, Durham, NC, United States
| | - H Scott Swartzwelder
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Department of Psychiatry and Behavioral Sciences, School of Medicine, Duke University, Durham, NC, United States
| | - Elena I Varlinskaya
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Center for Development and Behavioral Neuroscience, Department of Psychology, Binghamton University, Binghamton, NY, United States
| | - David F Werner
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Center for Development and Behavioral Neuroscience, Department of Psychology, Binghamton University, Binghamton, NY, United States
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19
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Towner TT, Spear LP. Rats exposed to intermittent ethanol during late adolescence exhibit enhanced habitual behavior following reward devaluation. Alcohol 2021; 91:11-20. [PMID: 33031883 DOI: 10.1016/j.alcohol.2020.09.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 09/15/2020] [Accepted: 09/28/2020] [Indexed: 12/29/2022]
Abstract
The brain undergoes substantial maturation during adolescence, and repeated exposure to ethanol at this time has been shown to result in long-lasting behavioral and neural consequences. During the broad period of adolescence, different neuronal populations and circuits are refined between early and late adolescence, suggesting the possibility that ethanol exposure at these differing times may lead to differential outcomes. The goal of the current study was to evaluate the impact of adolescent intermittent ethanol (AIE) during early and late adolescence on the formation of goal-directed and habitual behavior in adulthood. Male and female Sprague-Dawley rats were exposed to ethanol via intragastric gavage (4.0 g/kg, 25% v/v) every other day from postnatal day (P) 25-45 or P45-65, considered early and late adolescence, respectively. In adulthood (~P70 early or ~ P90 late), rats were gradually food-restricted and began operant training on a fixed ratio 1 schedule. Rats were then transitioned onto random interval schedules and eventually underwent a sensory-specific satiation procedure as a model of reward devaluation. Few differences as a result of adolescent ethanol exposure were found during instrumental training. Following reward devaluation, rats exposed to water and ethanol during early adolescence exhibited reductions in lever pressing, suggestive of a goal-directed response pattern. In contrast, late AIE males and females demonstrated persistent responding following both devalued and non-devalued trials, findings representative of a habitual behavior pattern. The shifts from goal-directed to habitual behavior noted only following late AIE contribute to the growing literature identifying specific behavioral consequences as a result of ethanol exposure during distinct developmental periods within adolescence. More work is needed to determine whether the greater habit formation following late AIE is also associated with elevated habitual ethanol consumption.
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Affiliation(s)
- Trevor Theodore Towner
- Neurobiology of Adolescent Drinking in Adulthood Consortium, Center for Development and Behavioral Neuroscience, Department of Psychology, Binghamton University, Binghamton, NY, 13902-6000, United States.
| | - Linda Patia Spear
- Neurobiology of Adolescent Drinking in Adulthood Consortium, Center for Development and Behavioral Neuroscience, Department of Psychology, Binghamton University, Binghamton, NY, 13902-6000, United States
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20
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Suhaimi FW, Hassan Z, Mansor SM, Müller CP. The effects of chronic mitragynine (Kratom) exposure on the EEG in rats. Neurosci Lett 2021; 745:135632. [PMID: 33444671 DOI: 10.1016/j.neulet.2021.135632] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 01/04/2021] [Accepted: 01/05/2021] [Indexed: 02/06/2023]
Abstract
Mitragynine is the main alkaloid isolated from the leaves of Mitragyna speciosa Korth (Kratom). Kratom has been widely used to relieve pain and opioid withdrawal symptoms in humans but may also cause memory deficits. Here we investigated the changes in brain electroencephalogram (EEG) activity after acute and chronic exposure to mitragynine in freely moving rats. Vehicle, morphine (5 mg/kg) or mitragynine (1, 5 and 10 mg/kg) were administered for 28 days, and EEG activity was repeatedly recorded from the frontal cortex, neocortex and hippocampus. Repeated exposure to mitragynine increased delta, but decreased alpha powers in both cortical regions. It further decreased delta power in the hippocampus. These findings suggest that acute and chronic mitragynine can have profound effects on EEG activity, which may underlie effects on behavioral activity and cognition, particularly learning and memory function.
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Affiliation(s)
- Farah Wahida Suhaimi
- Centre for Drug Research, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia.
| | - Zurina Hassan
- Centre for Drug Research, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia
| | - Sharif Mahsufi Mansor
- Centre for Drug Research, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia
| | - Christian P Müller
- Department of Psychiatry and Psychotherapy, University Clinic, Friedrich-Alexander-University of Erlangen-Nuremberg, Schwabachanlage 6, 91054, Erlangen, Germany.
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21
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Pascual M, López‐Hidalgo R, Montagud‐Romero S, Ureña‐Peralta JR, Rodríguez‐Arias M, Guerri C. Role of mTOR-regulated autophagy in spine pruning defects and memory impairments induced by binge-like ethanol treatment in adolescent mice. Brain Pathol 2021; 31:174-188. [PMID: 32876364 PMCID: PMC8018167 DOI: 10.1111/bpa.12896] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 08/14/2020] [Accepted: 08/24/2020] [Indexed: 12/11/2022] Open
Abstract
Adolescence is a brain maturation developmental period during which remodeling and changes in synaptic plasticity and neural connectivity take place in some brain regions. Different mechanism participates in adolescent brain maturation, including autophagy that plays a role in synaptic development and plasticity. Alcohol is a neurotoxic compound and its abuse in adolescence induces neuroinflammation, synaptic and myelin alterations, neural damage and behavioral impairments. Changes in synaptic plasticity and its regulation by mTOR have also been suggested to play a role in the behavioral dysfunction of binge ethanol drinking in adolescence. Therefore, by considering the critical role of mTOR in both autophagy and synaptic plasticity in the developing brain, the present study aims to evaluate whether binge ethanol treatment in adolescence would induce dysfunctions in synaptic plasticity and cognitive functions and if mTOR inhibition with rapamycin is capable of restoring both effects. Using C57BL/6 adolescent female and male mice (PND30) treated with ethanol (3 g/kg) on two consecutive days at 48-hour intervals over 2 weeks, we show that binge ethanol treatment alters the density and morphology of dendritic spines, effects that are associated with learning and memory impairments and changes in the levels of both transcription factor CREB phosphorylation and miRNAs. Rapamycin administration (3 mg/kg) prior to ethanol administration restores ethanol-induced changes in both plasticity and behavior dysfunctions in adolescent mice. These results support the critical role of mTOR/autophagy dysfunctions in the dendritic spines alterations and cognitive alterations induced by binge alcohol in adolescence.
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Affiliation(s)
- María Pascual
- Department of Molecular and Cellular Pathology of AlcoholPríncipe Felipe Research CenterValenciaSpain
- Department of PhysiologySchool of Medicine and DentistryUniversity of ValenciaValenciaSpain
| | - Rosa López‐Hidalgo
- Department of Molecular and Cellular Pathology of AlcoholPríncipe Felipe Research CenterValenciaSpain
| | | | - Juan R. Ureña‐Peralta
- Department of Molecular and Cellular Pathology of AlcoholPríncipe Felipe Research CenterValenciaSpain
| | | | - Consuelo Guerri
- Department of Molecular and Cellular Pathology of AlcoholPríncipe Felipe Research CenterValenciaSpain
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22
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Healey KL, Kibble S, Hodges S, Reissner KJ, Testen A, Wills TA, Acheson SK, Siemsen BM, McFaddin JA, Scofield MD, Swartzwelder HS. Enduring alterations in hippocampal astrocytesynaptic proximity following adolescent alcohol exposure: reversal by gabapentin. Neural Regen Res 2020; 15:1496-1501. [PMID: 31997814 PMCID: PMC7059577 DOI: 10.4103/1673-5374.274339] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 09/29/2019] [Accepted: 10/07/2019] [Indexed: 11/27/2022] Open
Abstract
Adolescent alcohol abuse is a substantive public health problem that has been the subject of intensive study in recent years. Despite reports of a wide range of effects of adolescent intermittent ethanol (AIE) exposure on brain and behavior, little is known about the mechanisms that may underlie those effects, and even less about treatments that might reverse them. Recent studies from our laboratory have indicated that AIE produced enduring changes in astrocyte function and synaptic activity in the hippocampal formation, suggesting the possibility of an alteration in astrocyte-neuronal connectivity and function. We utilized astrocyte-specific, membrane restricted viral labeling paired with immunohistochemistry to perform confocal single cell astrocyte imaging, three-dimensional reconstruction, and quantification of astrocyte morphology in hippocampal area CA1 from adult rats after AIE. Additionally, we assessed the colocalization of astrocyte plasma membrane labeling with immunoreactivity for AMPA-(α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid) glutamate receptor 1, an AMPA receptor subunit and established neuronal marker of excitatory synapses, as a metric of astrocyte-synapse proximity. AIE significantly reduced the colocalization of the astrocyte plasma membrane with synaptic marker puncta in adulthood. This is striking in that it suggests not only an alteration of the physical association of astrocytes with synapses by AIE, but one that lasts into adulthood - well after the termination of alcohol exposure. Perhaps even more notable, the AIE-induced reduction of astrocyte-synapse interaction was reversed by sub-chronic treatment with the clinically used agent, gabapentin (Neurontin), in adulthood. This suggests that a medication in common clinical use may have the potential to reverse some of the enduring effects of adolescent alcohol exposure on brain function. All animal experiments conducted were approved by the Duke University Institutional Animal Care and Use Committee (Protocol Registry Number A159-18-07) on July 27, 2018.
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Affiliation(s)
- Kati L. Healey
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA
| | - Sandra Kibble
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA
| | - Sierra Hodges
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA
| | - Kathryn J. Reissner
- Department of Psychology and Neuroscience, University of North Carolina, Chapel Hill, NC, USA
| | - Anze Testen
- Department of Psychology and Neuroscience, University of North Carolina, Chapel Hill, NC, USA
| | - Tiffany A. Wills
- Department of Cell Biology and Anatomy, LSU School of Medicine, New Orleans, LA, USA
| | - Shawn K. Acheson
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA
| | - Benjamin M. Siemsen
- Department of Anesthesia and Perioperative Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - John A. McFaddin
- Department of Anesthesia and Perioperative Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Michael D. Scofield
- Department of Anesthesia and Perioperative Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - H. Scott Swartzwelder
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA
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Monleón S, Duque A, Vinader-Caerols C. Emotional memory impairment produced by binge drinking in mice is counteracted by the anti-inflammatory indomethacin. Behav Brain Res 2020; 381:112457. [PMID: 31891744 DOI: 10.1016/j.bbr.2019.112457] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 12/13/2019] [Accepted: 12/27/2019] [Indexed: 01/13/2023]
Abstract
The Binge Drinking (BD) pattern of alcohol consumption, prevalent in adolescents and young adults, has been associated with memory impairment. In addition, evidence shows that alcohol abuse causes neuroinflammation, which may contribute to the brain damage produced by alcohol and explain its cognitive consequences. In this study, we evaluated the effectiveness of the anti-inflammatory indomethacin in counteracting the memory impairment produced by alcohol (ethanol) in adolescent mice of both sexes. Animals were randomly assigned to one of four groups for each sex: SS (saline + saline), SA (saline + alcohol), SI (saline + indomethacin) and AI (alcohol + indomethacin). They were injected acutely (Experiment 1) or chronically intermittent (Experiment 2) with saline, ethanol (3 g/kg) and indomethacin (10 mg/kg). All subjects were evaluated in an inhibitory avoidance task 96 h after treatment. With acute administration, SA groups showed significantly lower Test latencies than SS groups, while AI groups had similar latencies to controls. The chronic-intermittent administration of alcohol, an animal model of BD, produced significant emotional memory impairment -blocking learning in males- which was counteracted by indomethacin, as the AI groups had similar latencies to the SS groups. No significant differences were observed in locomotor activity or analgesia. In conclusion, alcohol BD (one or several episodes) impairs emotional memory in mice. This impairment is not secondary to the effects of alcohol BD on locomotor activity or pain sensitivity, and it is counteracted by indomethacin. Therefore, the memory impairment produced by alcohol BD seems to be mediated, in part, by neuroinflammatory processes. These findings open a window for new treatments for alcohol use disorders.
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Affiliation(s)
- Santiago Monleón
- Department of Psychobiology, University of Valencia, Valencia, Spain.
| | - Aranzazu Duque
- Department of Psychology, Universidad Internacional de Valencia, Valencia, Spain
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Menezes J, Souto das Neves BH, Gonçalves R, Benetti F, Mello-Carpes PB. Maternal deprivation impairs memory and cognitive flexibility, effect that is avoided by environmental enrichment. Behav Brain Res 2020; 381:112468. [DOI: 10.1016/j.bbr.2020.112468] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 01/03/2020] [Accepted: 01/03/2020] [Indexed: 11/24/2022]
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Contreras A, Morales L, Del Olmo N, Pérez-García C. Effects of Intermittent versus Chronic-Moderate Ethanol Administration during Adolescence in the Adult Hippocampal Phosphoproteome. Chem Res Toxicol 2020; 33:448-460. [PMID: 31944673 DOI: 10.1021/acs.chemrestox.9b00359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Alcohol consumption during adolescence is known to cause different impairments in the hippocampus that could lead to persistent deficits in adulthood. A common pattern of alcohol use in adolescents consists of excessive and intermittent alcohol consumption over a very short period of time (binge drinking). Protein phosphorylation is a mechanism underlying memory processes and we have previously demonstrated changes in the rat hippocampal phosphoproteome after a single dose of ethanol; however, studies showing the phosphoprotein alterations in the hippocampus after repeated exposition to alcohol are limited. This study focuses on the identification of the phosphoproteins differentially regulated in the adolescent rat hippocampus after repeated ethanol administration by comparing different patterns of alcohol treatments according to dose and frequency of administration ((i) moderate dose-chronic use, (ii) low dose-intermittent use, and (iii) high dose-intermittent use). We have used a proteomic approach, including phosphoprotein enrichment by immobilized metal affinity chromatography, which revealed 21 proteins differentially affected depending on the pattern of alcohol treatment used. Many of these proteins are included in glycolysis and glucagon signaling pathways and are also involved in neurodegeneration, which could reinforce the role of metabolic alterations in the neural damage induced by repeated alcohol exposure during adolescence.
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Affiliation(s)
- Ana Contreras
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia , Universidad CEU-San Pablo , Madrid 28003 , Spain
| | - Lidia Morales
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia , Universidad CEU-San Pablo , Madrid 28003 , Spain
| | - Nuria Del Olmo
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia , Universidad CEU-San Pablo , Madrid 28003 , Spain
| | - Carmen Pérez-García
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia , Universidad CEU-San Pablo , Madrid 28003 , Spain
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Neurochemical Evidence of Preclinical and Clinical Reports on Target-Based Therapy in Alcohol Used Disorder. Neurochem Res 2020; 45:491-507. [PMID: 31898084 DOI: 10.1007/s11064-019-02944-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 12/13/2019] [Accepted: 12/20/2019] [Indexed: 10/25/2022]
Abstract
Alcohol use disorder (AUD) is a chronic relapsing disorder, which enforces a person to compulsively seek alcohol, restricting control over alcohol intake leads to emergence of an undesired emotional state during abstinence. There are recent advances for better understanding of neurocircuitry involved in the pathophysiology of AUD. Alcohol interaction with neuronal membrane proteins results in changes in neuronal circuits. It is also linked with the potential medication and their clinical validation concerning their pharmacological targets for alcoholic abstinence. This review covers research work from the past few decades on the therapeutic advances on treatment of alcohol dependence; further detailing the fundamental neurochemical mechanisms after alcohol administration. It also covers interaction of alcohol with GABAergic, glutaminergic, dopaminergic, serotonergic and opioid systems. This review further elaborated the neurobiology of noradrenergic, cholinergic and cannabinoid systems and their interaction with AUD. Elaborative information of potential drug targets under current exploration for AUD treatment with their mechanisms are reported here along with clinical outcomes and the associated side effects.
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