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Gnatowski ER, Jurmain JL, Dozmorov MG, Wolstenholme JT, Miles MF. Ninein, a candidate gene for ethanol anxiolysis, shows complex exon-specific expression and alternative splicing differences between C57BL/6J and DBA/2J mice. Front Genet 2024; 15:1455616. [PMID: 39323865 PMCID: PMC11422218 DOI: 10.3389/fgene.2024.1455616] [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: 06/27/2024] [Accepted: 08/29/2024] [Indexed: 09/27/2024] Open
Abstract
Ethanol's anxiolytic actions contribute to increased consumption and the development of Alcohol Use Disorder (AUD). Our laboratory previously identified genetic loci contributing to the anxiolytic-like properties of ethanol in BXD recombinant inbred mice, derived from C57BL/6J (B6) and DBA/2J (D2) progenitor strains. That work identified Ninein (Nin) as a candidate gene underlying ethanol's acute anxiolytic-like properties in BXD mice. Nin has a complex exonic content with known alternative splicing events that alter cellular distribution of the NIN protein. We hypothesize that strain-specific differences in Nin alternative splicing contribute to changes in Nin gene expression and B6/D2 strain differences in ethanol anxiolysis. Using quantitative reverse-transcriptase PCR to target specific Nin splice variants, we identified isoform-specific exon expression differences between B6 and D2 mice in prefrontal cortex, nucleus accumbens and amygdala. We extended this analysis using deep RNA sequencing in B6 and D2 nucleus accumbens samples and found that total Nin expression was significantly higher in D2 mice. Furthermore, exon utilization and alternative splicing analyses identified eight differentially utilized exons and significant exon-skipping events between the strains, including three novel splicing events in the 3' end of the Nin gene that were specific to the D2 strain. Additionally, we document multiple single nucleotide polymorphisms in D2 Nin exons that are predicted to have deleterious effects on protein function. Our studies provide the first in-depth analysis of Nin alternative splicing in brain and identify a potential genetic mechanism altering Nin expression and function between B6 and D2 mice, thus possibly contributing to differences in the anxiolytic-like properties of ethanol between these strains. This work adds novel information to our understanding of genetic differences modulating ethanol actions on anxiety that may contribute to the risk for alcohol use disorder.
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Affiliation(s)
- E R Gnatowski
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, United States
- VCU Alcohol Research Center, Virginia Commonwealth University, Richmond, United States
| | - J L Jurmain
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, United States
| | - M G Dozmorov
- VCU Alcohol Research Center, Virginia Commonwealth University, Richmond, United States
- Department of Biostatistics, Virginia Commonwealth University, Richmond, United States
| | - J T Wolstenholme
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, United States
- VCU Alcohol Research Center, Virginia Commonwealth University, Richmond, United States
| | - M F Miles
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, United States
- VCU Alcohol Research Center, Virginia Commonwealth University, Richmond, United States
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2
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van Ingelgom T, Didone V, Godefroid L, Quertemont É. Effects of social housing conditions on ethanol-induced behavioral sensitization in Swiss mice. Psychopharmacology (Berl) 2024; 241:987-1000. [PMID: 38206359 DOI: 10.1007/s00213-024-06527-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 01/03/2024] [Indexed: 01/12/2024]
Abstract
RATIONALE In previous animal model studies, it was shown that drug sensitization is dependent upon physical environmental conditions. However, the effects of social housing conditions on drug sensitization is much less known. OBJECTIVE The aim of the present study was to investigate the effects of social conditions, through the size of housing groups, on ethanol stimulant effects and ethanol-induced behavioral sensitization in mice. MATERIALS AND METHODS Male and female Swiss mice were housed in groups of different sizes (isolated mice, two mice per cage, four mice per cage and eight mice per cage) during a six-week period. A standard paradigm of ethanol-induced locomotor sensitization was then started with one daily injection of 2.5 g/kg ethanol for 8 consecutive days. RESULTS The results show that social housing conditions affect the acute stimulant effects of ethanol. The highest stimulant effects were observed in socially isolated mice and then gradually decreased as the size of the group increased. Although the rate of ethanol sensitization did not differ between groups, the ultimate sensitized levels of ethanol-induced stimulant effects were significantly reduced in mice housed in groups of eight. CONCLUSIONS These results are consistent with the idea that higher levels of acute and sensitized ethanol stimulant effects are observed in mice housed in stressful housing conditions, such as social isolation.
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Affiliation(s)
- Théo van Ingelgom
- Psychologie et Neuroscience Cognitive (PsyNCog), Psychologie Quantitative, Université de Liège, Place des Orateurs 2 (B32), Liège, B-4000, Belgium
| | - Vincent Didone
- Psychologie et Neuroscience Cognitive (PsyNCog), Psychologie Quantitative, Université de Liège, Place des Orateurs 2 (B32), Liège, B-4000, Belgium
| | - Leeloo Godefroid
- Psychologie et Neuroscience Cognitive (PsyNCog), Psychologie Quantitative, Université de Liège, Place des Orateurs 2 (B32), Liège, B-4000, Belgium
| | - Étienne Quertemont
- Psychologie et Neuroscience Cognitive (PsyNCog), Psychologie Quantitative, Université de Liège, Place des Orateurs 2 (B32), Liège, B-4000, Belgium.
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3
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Carvalho L, Lasek AW. It is not just about transcription: involvement of brain RNA splicing in substance use disorders. J Neural Transm (Vienna) 2024; 131:495-503. [PMID: 38396082 PMCID: PMC11055753 DOI: 10.1007/s00702-024-02740-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] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 01/04/2024] [Indexed: 02/25/2024]
Abstract
Alternative splicing is a co-transcriptional process that significantly contributes to the molecular landscape of the cell. It plays a multifaceted role in shaping gene transcription, protein diversity, and functional adaptability in response to environmental cues. Recent studies demonstrate that drugs of abuse have a profound impact on alternative splicing patterns within different brain regions. Drugs like alcohol and cocaine modify the expression of genes responsible for encoding splicing factors, thereby influencing alternative splicing of crucial genes involved in neurotransmission, neurogenesis, and neuroinflammation. Notable examples of these alterations include alcohol-induced changes in splicing factors such as HSPA6 and PCBP1, as well as cocaine's impact on PTBP1 and SRSF11. Beyond the immediate effects of drug exposure, recent research has shed light on the role of alternative splicing in contributing to the risk of substance use disorders (SUDs). This is exemplified by exon skipping events in key genes like ELOVL7, which can elevate the risk of alcohol use disorder. Lastly, drugs of abuse can induce splicing alterations through epigenetic modifications. For example, cocaine exposure leads to alterations in levels of trimethylated lysine 36 of histone H3, which exhibits a robust association with alternative splicing and serves as a reliable predictor for exon exclusion. In summary, alternative splicing has emerged as a critical player in the complex interplay between drugs of abuse and the brain, offering insights into the molecular underpinnings of SUDs.
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Affiliation(s)
- Luana Carvalho
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, 1220 E. Broad ST, Box 980613, Richmond, VA, 23298, USA.
| | - Amy W Lasek
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, 1220 E. Broad ST, Box 980613, Richmond, VA, 23298, USA
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4
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Deyssenroth MA, Williams RP, Lesseur C, Jacobson SW, Jacobson JL, Cheng H, Bose P, Li Q, Wainwright H, Meintjes EM, Hao K, Chen J, Carter RC. Prenatal alcohol exposure is associated with changes in placental gene co-expression networks. Sci Rep 2024; 14:2687. [PMID: 38302628 PMCID: PMC10834523 DOI: 10.1038/s41598-024-52737-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 01/23/2024] [Indexed: 02/03/2024] Open
Abstract
Alcohol consumption during pregnancy can result in a range of adverse postnatal outcomes among exposed children. However, identifying at-risk children is challenging given the difficulty to confirm prenatal alcohol exposure and the lack of early diagnostic tools. Placental surveys present an important opportunity to uncover early biomarkers to identify those at risk. Here, we report the first transcriptome-wide evaluation to comprehensively evaluate human placental pathways altered by fetal alcohol exposure. In a prospective longitudinal birth cohort in Cape Town, South Africa, we performed bulk tissue RNAseq in placenta samples from 32 women reporting heavy drinking during pregnancy and 30 abstainers/light drinkers. Weighted gene co-expression network analysis (WGCNA) and differential gene expression analysis were performed to assess associations between fetal alcohol exposure and placental gene expression patterns at a network-wide and single gene level, respectively. The results revealed altered expression in genes related to erythropoiesis and angiogenesis, which are implicated in established postnatal phenotypes related to alcohol exposure, including disruptions in iron homeostasis, growth, and neurodevelopment. The reported findings provide insights into the molecular pathways affected by prenatal alcohol exposure and highlight the potential of placental biomarkers for detecting and understanding the effects of alcohol on fetal development.
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Affiliation(s)
- Maya A Deyssenroth
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Randy P Williams
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Corina Lesseur
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Sandra W Jacobson
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA
- Department of Human Biology, University of Cape Town Faculty of Health Sciences, Cape Town, South Africa
- Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Joseph L Jacobson
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA
- Department of Human Biology, University of Cape Town Faculty of Health Sciences, Cape Town, South Africa
| | - Haoxiang Cheng
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Promita Bose
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Qian Li
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Helen Wainwright
- Department of Pathology, National Health Laboratory Service, Cape Town, South Africa
| | - Ernesta M Meintjes
- Department of Human Biology, University of Cape Town Faculty of Health Sciences, Cape Town, South Africa
| | - Ke Hao
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jia Chen
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - R Colin Carter
- Department of Human Biology, University of Cape Town Faculty of Health Sciences, Cape Town, South Africa.
- Departments of Emergency Medicine and Pediatrics, Institute of Human Nutrition, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA.
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5
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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: 1] [Impact Index Per Article: 1.0] [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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6
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Transcranial direct current stimulation (tDCS) reduces motivation to drink ethanol and reacquisition of ethanol self-administration in female mice. Sci Rep 2022; 12:198. [PMID: 34997004 PMCID: PMC8741977 DOI: 10.1038/s41598-021-03940-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 11/24/2021] [Indexed: 12/02/2022] Open
Abstract
Transcranial direct current stimulation (tDCS) is an emerging noninvasive brain neuromodulation technique aimed at relieving symptoms associated with psychiatric disorders, including addiction. The goal of the present study was to better identify which phase of alcohol-related behavior (hedonic effect, behavioral sensitization, self-administration, or motivation to obtain the drug) might be modulated by repeated anodal tDCS over the frontal cortex (0.2 mA, 20 min, twice a day for 5 consecutive days), using female mice as a model. Our data showed that tDCS did not modulate the hedonic effects of ethanol as assessed by a conditioned place preference test (CPP) or the expression of ethanol-induced behavioral sensitization. Interestingly, tDCS robustly reduced reacquisition of ethanol consumption (50% decrease) following extinction of self-administration in an operant paradigm. Furthermore, tDCS significantly decreased motivation to drink ethanol on a progressive ratio schedule (30% decrease). Taken together, our results show a dissociation between the effects of tDCS on “liking” (hedonic aspect; no effect in the CPP) and “wanting” (motivation; decreased consumption on a progressive ratio schedule). Our tDCS procedure in rodents will allow us to better understand its mechanisms of action in order to accelerate its use as a complementary and innovative tool to help alcohol-dependent patients maintain abstinence or reduce ethanol intake.
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7
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Egervari G, Siciliano CA, Whiteley EL, Ron D. Alcohol and the brain: from genes to circuits. Trends Neurosci 2021; 44:1004-1015. [PMID: 34702580 DOI: 10.1016/j.tins.2021.09.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 09/08/2021] [Accepted: 09/30/2021] [Indexed: 01/27/2023]
Abstract
Alcohol use produces wide-ranging and diverse effects on the central nervous system. It influences intracellular signaling mechanisms, leading to changes in gene expression, chromatin remodeling, and translation. As a result of these molecular alterations, alcohol affects the activity of neuronal circuits. Together, these mechanisms produce long-lasting cellular adaptations in the brain that in turn can drive the development and maintenance of alcohol use disorder (AUD). We provide an update on alcohol research, focusing on multiple levels of alcohol-induced adaptations, from intracellular changes to changes in neural circuits. A better understanding of how alcohol affects these diverse and interlinked mechanisms may lead to the identification of novel therapeutic targets and to the development of much-needed novel and efficacious treatment options.
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Affiliation(s)
- Gabor Egervari
- Department of Cell and Developmental Biology, Epigenetics Institute, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Cody A Siciliano
- Department of Pharmacology, Vanderbilt Center for Addiction Research, Vanderbilt University, Nashville, TN 37203, USA.
| | - Ellanor L Whiteley
- Department of Neurology, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Dorit Ron
- Department of Neurology, University of California, San Francisco, San Francisco, CA 94143, USA.
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8
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Zhang SN, Li XZ, Yang WD, Zhou Y. Sophorae tonkinensis radix et rhizome-induced pulmonary toxicity: A study on the toxic mechanism and material basis based on integrated omics and bioinformatics analyses. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1179:122868. [PMID: 34333216 DOI: 10.1016/j.jchromb.2021.122868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 06/05/2021] [Accepted: 07/20/2021] [Indexed: 12/24/2022]
Abstract
The root and rhizome of Sophora tonkinensis Gagnep. (ST) are widely used for the treatment of tonsillitis, sore throats, and heat-evil-induced diseases in traditional Chinese medicine. However, the clinical application of ST is relatively limited due to its toxicity. The mechanism and material basis of ST-induced pulmonary toxicity are still unclear. In the present research, integrated omics and bioinformatics analyses were used to investigate the toxic mechanism and material basis of ST in lung tissue. Proteomics and metabonomics were integrated to analyze the differentially expressed proteins and metabolites. Joint pathway analysis was used to analyze the significantly dysregulated pathways. PubChem and the Comparative Toxicogenomics Database were applied for the screen of toxic targets and compounds. Integrated omics revealed that 323 proteins and 50 metabolites were differentially expressed after treating with ST, out of which 19 proteins and 1 metabolite were significantly enriched in seven pathways. Bioinformatics showed that 15 compounds may indirectly affect the expression of 9 toxic targets of ST. Multiple toxic targets of ST-induced pulmonary injury were found in the study, whose dysregulation may trigger pulmonary cancer, dyspnea, and oxidative stress. Multiple compounds may be the toxic material basis in response to these effects.
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Affiliation(s)
- Shuai-Nan Zhang
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guian new area 550025, PR China
| | - Xu-Zhao Li
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guian new area 550025, PR China.
| | - Wu-de Yang
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guian new area 550025, PR China
| | - Ying Zhou
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guian new area 550025, PR China.
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9
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Zhang X, Yu H, Bai R, Ma C. Identification and Characterization of Biomarkers and Their Role in Opioid Addiction by Integrated Bioinformatics Analysis. Front Neurosci 2020; 14:608349. [PMID: 33328875 PMCID: PMC7729193 DOI: 10.3389/fnins.2020.608349] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 11/04/2020] [Indexed: 11/13/2022] Open
Abstract
Although numerous studies have confirmed that the mechanisms of opiate addiction include genetic and epigenetic aspects, the results of such studies are inconsistent. Here, we downloaded gene expression profiling information, GSE87823, from the Gene Expression Omnibus database. Samples from males between ages 19 and 35 were selected for analysis of differentially expressed genes (DEGs). Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway and Gene Ontology (GO) enrichment analyses were used to analyze the pathways associated with the DEGs. We further constructed protein-protein interaction (PPI) networks using the STRING database and used 10 different calculation methods to validate the hub genes. Finally, we utilized the Basic Local Alignment Search Tool (BLAST) to identify the DEG with the highest sequence similarity in mouse and detected the change in expression of the hub genes in this animal model using RT-qPCR. We identified three key genes, ADCY9, PECAM1, and IL4. ADCY9 expression decreased in the nucleus accumbens of opioid-addicted mice compared with control mice, which was consistent with the change seen in humans. The importance and originality of this study are provided by two aspects. Firstly, we used a variety of calculation methods to obtain hub genes; secondly, we exploited homology analysis to solve the difficult challenge that addiction-related experiments cannot be carried out in patients or healthy individuals. In short, this study not only explores potential biomarkers and therapeutic targets of opioid addiction but also provides new ideas for subsequent research on opioid addiction.
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Affiliation(s)
- Xiuning Zhang
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang, China.,Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang, China.,Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Hailei Yu
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang, China.,Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang, China
| | - Rui Bai
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang, China.,Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang, China
| | - Chunling Ma
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang, China.,Research Unit of Digestive Tract Microecosystem Pharmacology and Toxicology, Chinese Academy of Medical Sciences, Shijiazhuang, China
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10
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Radcliffe RA, Dowell R, Odell AT, Richmond PA, Bennett B, Larson C, Kechris K, Saba LM, Rudra P, Wen S. Systems genetics analysis of the LXS recombinant inbred mouse strains:Genetic and molecular insights into acute ethanol tolerance. PLoS One 2020; 15:e0240253. [PMID: 33095786 PMCID: PMC7584226 DOI: 10.1371/journal.pone.0240253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 09/22/2020] [Indexed: 11/18/2022] Open
Abstract
We have been using the Inbred Long- and Short-Sleep mouse strains (ILS, ISS) and a recombinant inbred panel derived from them, the LXS, to investigate the genetic underpinnings of acute ethanol tolerance which is considered to be a risk factor for alcohol use disorders (AUDs). Here, we have used RNA-seq to examine the transcriptome of whole brain in 40 of the LXS strains 8 hours after a saline or ethanol "pretreatment" as in previous behavioral studies. Approximately 1/3 of the 14,184 expressed genes were significantly heritable and many were unique to the pretreatment. Several thousand cis- and trans-eQTLs were mapped; a portion of these also were unique to pretreatment. Ethanol pretreatment caused differential expression (DE) of 1,230 genes. Gene Ontology (GO) enrichment analysis suggested involvement in numerous biological processes including astrocyte differentiation, histone acetylation, mRNA splicing, and neuron projection development. Genetic correlation analysis identified hundreds of genes that were correlated to the behaviors. GO analysis indicated that these genes are involved in gene expression, chromosome organization, and protein transport, among others. The expression profiles of the DE genes and genes correlated to AFT in the ethanol pretreatment group (AFT-Et) were found to be similar to profiles of HDAC inhibitors. Hdac1, a cis-regulated gene that is located at the peak of a previously mapped QTL for AFT-Et, was correlated to 437 genes, most of which were also correlated to AFT-Et. GO analysis of these genes identified several enriched biological process terms including neuron-neuron synaptic transmission and potassium transport. In summary, the results suggest widespread genetic effects on gene expression, including effects that are pretreatment-specific. A number of candidate genes and biological functions were identified that could be mediating the behavioral responses. The most prominent of these was Hdac1 which may be regulating genes associated with glutamatergic signaling and potassium conductance.
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Affiliation(s)
- Richard A. Radcliffe
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, United States of America
- Institute for Behavioral Genetics, University of Colorado Boulder, Boulder CO, United States of America
| | - Robin Dowell
- BioFrontiers Institute, University of Colorado Boulder, Boulder, CO, United States of America
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado Boulder, Boulder, CO, United States of America
- Department of Computer Science, University of Colorado Boulder, Boulder, CO, United States of America
| | - Aaron T. Odell
- BioFrontiers Institute, University of Colorado Boulder, Boulder, CO, United States of America
| | - Phillip A. Richmond
- BioFrontiers Institute, University of Colorado Boulder, Boulder, CO, United States of America
| | - Beth Bennett
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, United States of America
| | - Colin Larson
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, United States of America
| | - Katerina Kechris
- Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, CO, United States of America
| | - Laura M. Saba
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, United States of America
| | - Pratyaydipta Rudra
- Department of Statistics, Oklahoma State University, Stillwater, OK, United States of America
| | - Shi Wen
- Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, CO, United States of America
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11
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Wu R, Liu J, Wang K, Huang Y, Zhang Y, Li JX. Effects of a trace amine-associated receptor 1 agonist RO 5263397 on ethanol-induced behavioral sensitization. Behav Brain Res 2020; 390:112641. [PMID: 32407821 DOI: 10.1016/j.bbr.2020.112641] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/29/2020] [Accepted: 04/01/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND Alcohol dependence is a chronic and severe health problem which puts a heavy burden on society. Alcohol activates mesolimbic dopamine circuity to achieve its reinforcing effect. While TAAR1 is critically involved in the modulation of dopamine, there is little evidence indicating that TAAR1 could play a role in behavioral effects of ethanol. METHODS By using the animal model of behavioral sensitization induced by ethanol in mice, the present study was performed to investigate whether the activation of TAAR1 would affect the behavioral plasticity of ethanol. RESULTS Repeated administration with ethanol induced a significant increased locomotion in WT mice with females showing higher level of sensitization to ethanol than male mice. The TAAR1 agonist RO5263397 significantly decreased the expression of ethanol-induced behavioral sensitization both in male and female WT mice (0.1 and 0.32 mg/kg). Repeated RO5263397 exposure also prevented the development of behavioral sensitization to ethanol both in male and female WT mice. Moreover, while TAAR1-KO mice developed normal levels of ethanol-induced behavioral sensitization, RO5263397 did not affect this behavior in TAAR1-KO mice. CONCLUSIONS These results indicated that the TAAR1 agonist RO5263397 negatively regulated the expression and development of ethanol-elicited behavioral sensitization in WT but not in TAAR1-KO mice. The present study suggests that TAAR1 is probably involved in certain addiction-like effects of alcohol and could be a useful drug target for the development of new medications to treat alcohol dependence.
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Affiliation(s)
- Ruyan Wu
- Department of Pharmacology and Toxicology, University at Buffalo, Buffalo, NY, United States; School of Medicine, Yangzhou University, Yangzhou, China
| | - Jianfeng Liu
- Department of Pharmacology and Toxicology, University at Buffalo, Buffalo, NY, United States
| | - Kaixuan Wang
- Department of Pharmacology and Toxicology, University at Buffalo, Buffalo, NY, United States
| | - Yufei Huang
- Department of Pharmacology and Toxicology, University at Buffalo, Buffalo, NY, United States
| | - Yanan Zhang
- Research Triangle Institute, NC, United States
| | - Jun-Xu Li
- Department of Pharmacology and Toxicology, University at Buffalo, Buffalo, NY, United States.
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Wolfe SA, Farris SP, Mayfield JE, Heaney CF, Erickson EK, Harris RA, Mayfield RD, Raab-Graham KF. Ethanol and a rapid-acting antidepressant produce overlapping changes in exon expression in the synaptic transcriptome. Neuropharmacology 2018; 146:289-299. [PMID: 30419244 DOI: 10.1016/j.neuropharm.2018.11.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 10/03/2018] [Accepted: 11/07/2018] [Indexed: 01/02/2023]
Abstract
Alcohol use disorder (AUD) and major depressive disorder (MDD) are prevalent, debilitating, and highly comorbid disorders. The molecular changes that underlie their comorbidity are beginning to emerge. For example, recent evidence showed that acute ethanol exposure produces rapid antidepressant-like biochemical and behavioral responses. Both ethanol and fast-acting antidepressants block N-methyl-D-aspartate receptor (NMDAR) activity, leading to synaptic changes and long-lasting antidepressant-like behavioral effects. We used RNA sequencing to analyze changes in the synaptic transcriptome after acute treatment with ethanol or the NMDAR antagonist, Ro 25-6981. Ethanol and Ro 25-6981 induced differential, independent changes in gene expression. In contrast with gene-level expression, ethanol and Ro 25-6981 produced overlapping changes in exons, as measured by analysis of differentially expressed exons (DEEs). A prominent overlap in genes with DEEs indicated that changes in exon usage were important for both ethanol and Ro 25-6981 action. Structural modeling provided evidence that ethanol-induced exon expression in the NMDAR1 amino-terminal domain could induce conformational changes and thus alter NMDAR function. These findings suggest that the rapid antidepressant effects of ethanol and NMDAR antagonists reported previously may depend on synaptic exon usage rather than gene expression.
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Affiliation(s)
- Sarah A Wolfe
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, 92037, United States
| | - Sean P Farris
- Waggoner Center for Alcohol and Addiction Research, Department of Neuroscience, University of Texas at Austin, 2500 Speedway, Austin, TX, 78712, United States
| | - Joshua E Mayfield
- Department of Molecular Biosciences, University of Texas at Austin, 2500 Speedway, Austin, TX, 78712, United States
| | - Chelcie F Heaney
- Department of Physiology and Pharmacology, Wake Forest University Health Sciences, Medical Center Boulevard, Winston-Salem, NC, 27157-1083, United States
| | - Emma K Erickson
- Waggoner Center for Alcohol and Addiction Research, Department of Neuroscience, University of Texas at Austin, 2500 Speedway, Austin, TX, 78712, United States
| | - R Adron Harris
- Waggoner Center for Alcohol and Addiction Research, Department of Neuroscience, University of Texas at Austin, 2500 Speedway, Austin, TX, 78712, United States
| | - R Dayne Mayfield
- Waggoner Center for Alcohol and Addiction Research, Department of Neuroscience, University of Texas at Austin, 2500 Speedway, Austin, TX, 78712, United States
| | - Kimberly F Raab-Graham
- Department of Physiology and Pharmacology, Wake Forest University Health Sciences, Medical Center Boulevard, Winston-Salem, NC, 27157-1083, United States.
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