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Kipp BT, Savage LM. Modulation of the p75NTR during Adolescent Alcohol Exposure Prevents Cholinergic Neuronal Atrophy and Associated Acetylcholine Activity and Behavioral Dysfunction. Int J Mol Sci 2024; 25:5792. [PMID: 38891978 PMCID: PMC11172149 DOI: 10.3390/ijms25115792] [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: 03/31/2024] [Revised: 05/16/2024] [Accepted: 05/17/2024] [Indexed: 06/21/2024] Open
Abstract
Binge alcohol consumption during adolescence can produce lasting deficits in learning and memory while also increasing the susceptibility to substance use disorders. The adolescent intermittent ethanol (AIE) rodent model mimics human adolescent binge drinking and has identified the nucleus basalis magnocellularis (NbM) as a key site of pathology. The NbM is a critical regulator of prefrontal cortical (PFC) cholinergic function and attention. The cholinergic phenotype is controlled pro/mature neurotrophin receptor activation. We sought to determine if p75NTR activity contributes to the loss of cholinergic phenotype in AIE by using a p75NTR modulator (LM11A-31) to inhibit prodegenerative signaling during ethanol exposure. Male and female rats underwent 5 g/kg ethanol (AIE) or water (CON) exposure following 2-day-on 2-day-off cycles from postnatal day 25-57. A subset of these groups also received a protective dose of LM11A-31 (50 mg/kg) during adolescence. Rats were trained on a sustained attention task (SAT) and behaviorally relevant acetylcholine (ACh) activity was recorded in the PFC with a fluorescent indicator (AChGRAB 3.0). AIE produced learning deficits on the SAT, which were spared with LM11A-31. In addition, PFC ACh activity was blunted by AIE, which LM11A-31 corrected. Investigation of NbM ChAT+ and TrkA+ neuronal expression found that AIE led to a reduction of ChAT+TrkA+ neurons, which again LM11A-31 protected. Taken together, these findings demonstrate the p75NTR activity during AIE treatment is a key regulator of cholinergic degeneration.
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Affiliation(s)
| | - Lisa M. Savage
- Department of Psychology, Binghamton University-State University of New York, Binghamton, NY 13902, USA;
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Kipp BT, Lisa MS. Modulation of the p75NTR during adolescent alcohol exposure prevents cholinergic neuronal atrophy and associated acetylcholine activity and behavioral dysfunction. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.03.587970. [PMID: 38617368 PMCID: PMC11014512 DOI: 10.1101/2024.04.03.587970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
Binge alcohol consumption during adolescence produces lasting deficits in learning and memory, while also increasing the susceptibility to substance use disorders. The adolescent intermittent ethanol (AIE) rodent model mimics human adolescent binge drinking and has identified the Nucleus Basalis Magnocellularis (NbM) as a key site of pathology. The NbM is a critical regulator of prefrontal cortical (PFC) cholinergic function and attention. The cholinergic phenotype is controlled pro/mature neurotrophin receptor activation. We sought to determine if p75NTR activity contributes to the loss of cholinergic phenotype in AIE by using a p75NTR modulator (LM11A-31) to inhibit prodegenerative signaling during ethanol exposure. Male and female rats underwent 5g/kg ethanol (AIE) or water (CON) exposure following 2-day-on 2-day-off cycles from PND 25-57. A subset of these groups also received a protective dose of LM11A-31 (50mg/kg) during adolescence. Rats were trained on a sustained attention task (SAT) while recording activity with a fluorescent acetylcholine indicator (AChGRAB 3.0). AIE produced learning deficits on the SAT, which were spared with LM11A-31. In addition, mPFC ACh activity was blunted by AIE, which LM11A-31 corrected. Investigation of NbM ChAT+ and TrkA+ neuronal expression found that AIE led to a reduction of ChAT+TrkA+ neurons, which again LM11A-31 protected. Taken together these findings demonstrate the p75NTR activity during AIE treatment is a key regulator of cholinergic degeneration.
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3
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Bauer MR, McVey MM, Boehm SL. Drinking history dependent functionality of the dorsolateral striatum on gating alcohol and quinine-adulterated alcohol front-loading and binge drinking. Alcohol 2022; 105:43-51. [PMID: 36240946 PMCID: PMC9835618 DOI: 10.1016/j.alcohol.2022.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 09/13/2022] [Accepted: 09/29/2022] [Indexed: 01/26/2023]
Abstract
After an extended alcohol-drinking history, alcohol use can transition from controlled to compulsive, causing deleterious consequences. Alcohol use can be segregated into two distinct behaviors, alcohol seeking and alcohol taking. Expression of habitual and compulsive alcohol seeking depends on the dorsolateral striatum (DLS), a brain region thought to engage after extended alcohol access. However, it is unknown whether the DLS is also involved in compulsive-like alcohol taking. The purpose of this experiment was to identify whether the DLS gates compulsive-like binge alcohol drinking. To ask this question, we gave adult male and female C57BL/6J mice a binge-like alcohol-drinking history, which we have previously demonstrated to produce compulsive-like alcohol drinking (Bauer, McVey, & Boehm, 2021), or a water-drinking history. We then tested the involvement of the DLS on gating binge-like alcohol drinking and compulsive-like quinine-adulterated alcohol drinking via intra-DLS AMPA receptor antagonism. We hypothesized that pharmacological lesioning of the DLS would reduce compulsive-like quinine-adulterated alcohol (QuA) drinking, but not non-adulterated alcohol drinking, in male and female C57BL/6J mice. Three important findings were made. First, compulsive-like alcohol drinking is significantly blunted in cannulated mice. Because of this, we conclude that we were not able to adequately assess the effect of intra-DLS lesioning on compulsive-like alcohol drinking. Second, we found that the DLS gates binge-like alcohol drinking initially, which replicates findings in our previous work (Bauer, McVey, Germano, Zhang, & Boehm, 2022). However, following an extended alcohol history, the DLS no longer drives this behavior. Finally, alcohol and QuA front-loading is DLS-dependent in alcohol-history mice. Intra-DLS NBQX altered these drinking behaviors without altering ambulatory locomotor activity. These data demonstrate the necessity of the DLS in binge-like alcohol drinking before, but not following, an extended binge-like alcohol-drinking history and in alcohol front-loading in alcohol-history mice.
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Affiliation(s)
- Meredith R Bauer
- Indiana Alcohol Research Center and Department of Psychology, Indiana University - Purdue University Indianapolis, Indianapolis, IN 46202, United States
| | - Megan M McVey
- Indiana Alcohol Research Center and Department of Psychology, Indiana University - Purdue University Indianapolis, Indianapolis, IN 46202, United States
| | - Stephen L Boehm
- Indiana Alcohol Research Center and Department of Psychology, Indiana University - Purdue University Indianapolis, Indianapolis, IN 46202, United States.
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Bauer MR, McVey MM, Germano DM, Zhang Y, Boehm SL. Intra-dorsolateral striatal AMPA receptor antagonism reduces binge-like alcohol drinking in male and female C57BL/6J mice. Behav Brain Res 2022; 418:113631. [PMID: 34715146 PMCID: PMC8671209 DOI: 10.1016/j.bbr.2021.113631] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 09/15/2021] [Accepted: 10/11/2021] [Indexed: 12/27/2022]
Abstract
The dorsolateral striatum (DLS) is involved in addiction, reward, and alcohol related behaviors. The DLS primarily receives excitatory inputs which are gated by post-synaptic AMPA receptors. We antagonized AMPA receptors in the DLS to investigate how such modulation affects binge-like alcohol drinking in male and female C57BL/6J mice and whether an associated alcohol drinking history alters dorsomedial striatum (DMS) and DLS AMPA receptor expression. We also investigated the effect of intra-DLS NBQX on locomotor activity and saccharin drinking in mice. Mice were allowed free access to 20% alcohol for two hours each day for a total of seven days. Mice received an intra-DLS infusion of one of four concentrations of NBQX (saline, 0.15, 0.5, or 1.5 μg/side), an AMPA receptor antagonist, immediately prior to alcohol access on day 7. Two-hour binge alcohol intakes, locomotor activity, and blood alcohol concentrations were determined. Intra-DLS NBQX reduced binge-like alcohol drinking in a U-shaped manner in male and female mice. Intake predicted blood alcohol concentration, and locomotor activity was not affected. In a follow up experiment, we assessed whether the most effective NBQX concentration for reducing alcohol consumption also reduced saccharin drinking, finding intra-DLS NBQX did not alter saccharin drinking in male and female mice. These data suggest that AMPA receptors in the DLS play a role in the modulation of binge-like alcohol drinking. These findings further validate the importance of the DLS for alcohol related behaviors and alcohol use disorder.
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Affiliation(s)
- Meredith R Bauer
- Indiana Alcohol Research Center and Department of Psychology, Indiana University - Purdue University Indianapolis, Indianapolis, IN 46202, USA
| | - Megan M McVey
- Indiana Alcohol Research Center and Department of Psychology, Indiana University - Purdue University Indianapolis, Indianapolis, IN 46202, USA
| | - Damon M Germano
- Indiana Alcohol Research Center and Department of Psychology, Indiana University - Purdue University Indianapolis, Indianapolis, IN 46202, USA
| | - Yanping Zhang
- Indiana Alcohol Research Center and Department of Psychology, Indiana University - Purdue University Indianapolis, Indianapolis, IN 46202, USA
| | - Stephen L Boehm
- Indiana Alcohol Research Center and Department of Psychology, Indiana University - Purdue University Indianapolis, Indianapolis, IN 46202, USA.
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Quadir SG, Arleth GM, Jahad JV, Echeveste Sanchez M, Effinger DP, Herman MA. Sex differences in affective states and association with voluntary ethanol intake in Sprague-Dawley rats. Psychopharmacology (Berl) 2022; 239:589-604. [PMID: 35044485 DOI: 10.1007/s00213-021-06052-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/27/2021] [Indexed: 01/11/2023]
Abstract
Alcohol use disorders (AUDs) are a major problem across the USA. While AUD remains a complex human condition, it is difficult to isolate the directionality of anxiety and ethanol (EtOH) drinking from outside influences. The present study sought to investigate the relationship between affective states and EtOH intake using male and female Sprague-Dawley rats. Using complementary tests of anxiety- and depressive-like behavior, we found sex- and test-specific differences in basal affective behavior such that females displayed enhanced anxiety-like behavior in the splash test and males displayed enhanced anxiety-like behavior in the novelty-suppressed feeding test. Although, there were no sex differences in EtOH intake and no correlation between baseline anxiety-like behavior and subsequent EtOH intake, we did find that depressive-like behavior predicted future EtOH intake in female rats only. In addition, we observed an increase in depressive-like behavior is male rats in both the water and EtOH drinking groups (compared to baseline levels). Furthermore, post-drinking anxiety-like behavior, but not depressive-like behavior predicted subsequent EtOH intake in female rats. Lastly, we found a history of EtOH intake decreased pain thresholds in male and female rats, but increased anxiety-like and depressive-like behavior was associated with decreased thermal sensitivity only in EtOH-drinking males. Together, these experiments provide important information on the complex interaction between negative affect and EtOH intake and how these two contexts reciprocally do, or do not, influence each other in a sex-specific manner.
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Affiliation(s)
- S G Quadir
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - G M Arleth
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - J V Jahad
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - M Echeveste Sanchez
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - D P Effinger
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - M A Herman
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
- Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
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Zhang D, Zhao S, Zhang Z, Xu D, Lian D, Wu J, He D, Sun K, Li L. Regulation of the p75 neurotrophin receptor attenuates neuroinflammation and stimulates hippocampal neurogenesis in experimental Streptococcus pneumoniae meningitis. J Neuroinflammation 2021; 18:253. [PMID: 34727939 PMCID: PMC8561879 DOI: 10.1186/s12974-021-02294-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 10/09/2021] [Indexed: 12/12/2022] Open
Abstract
Background Streptococcus pneumoniae meningitis is a destructive central nervous system (CNS) infection with acute and long-term neurological disorders. Previous studies suggest that p75NTR signaling influences cell survival, apoptosis, and proliferation in brain-injured conditions. However, the role of p75NTR signaling in regulating pneumococcal meningitis (PM)-induced neuroinflammation and altered neurogenesis remains largely to be elucidated. Methods p75NTR signaling activation in the pathological process of PM was assessed. During acute PM, a small-molecule p75NTR modulator LM11A-31 or vehicle was intranasally administered for 3 days prior to S. pneumoniae exposure. At 24 h post-infection, clinical severity, histopathology, astrocytes/microglia activation, neuronal apoptosis and necrosis, inflammation-related transcription factors and proinflammatory cytokines/mediators were evaluated. Additionally, p75NTR was knocked down by the adenovirus-mediated short-hairpin RNA (shRNA) to ascertain the role of p75NTR in PM. During long-term PM, the intranasal administration of LM11A-31 or vehicle was continued for 7 days after successfully establishing the PM model. Dynamic changes in inflammation and hippocampal neurogenesis were assessed. Results Our results revealed that both 24 h (acute) and 7, 14, 28 day (long-term) groups of infected rats showed increased p75NTR expression in the brain. During acute PM, modulation of p75NTR through pretreatment of PM model with LM11A-31 significantly alleviated S. pneumoniae-induced clinical severity, histopathological injury and the activation of astrocytes and microglia. LM11A-31 pretreatment also significantly ameliorated neuronal apoptosis and necrosis. Moreover, we found that blocking p75NTR with LM11A-31 decreased the expression of inflammation-related transcription factors (NF-κBp65, C/EBPβ) and proinflammatory cytokines/mediators (IL-1β, TNF-α, IL-6 and iNOS). Furthermore, p75NTR knockdown induced significant changes in histopathology and inflammation-related transcription factors expression. Importantly, long-term LM11A-31 treatment accelerated the resolution of PM-induced inflammation and significantly improved hippocampal neurogenesis. Conclusion Our findings suggest that the p75NTR signaling plays an essential role in the pathogenesis of PM. Targeting p75NTR has beneficial effects on PM rats by alleviating neuroinflammation and promoting hippocampal neurogenesis. Thus, the p75NTR signaling may be a potential therapeutic target to improve the outcome of PM. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-021-02294-w.
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Affiliation(s)
- Dandan Zhang
- Department of Pediatric Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Kongjiang Road 1665, Shanghai, 200092, China
| | - Shengnan Zhao
- Department of Pediatric Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Kongjiang Road 1665, Shanghai, 200092, China
| | - Zhijie Zhang
- Department of Pediatric Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Kongjiang Road 1665, Shanghai, 200092, China
| | - Danfeng Xu
- Department of Pediatric Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Kongjiang Road 1665, Shanghai, 200092, China
| | - Di Lian
- Department of Pediatric Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Kongjiang Road 1665, Shanghai, 200092, China
| | - Jing Wu
- Department of Pediatric Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Kongjiang Road 1665, Shanghai, 200092, China
| | - Dake He
- Department of Pediatric Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Kongjiang Road 1665, Shanghai, 200092, China
| | - Kun Sun
- Department of Pediatric Cardiology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Kongjiang Road 1665, Shanghai, 200092, China.
| | - Ling Li
- Department of Pediatric Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Kongjiang Road 1665, Shanghai, 200092, China.
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Dremencov E, Jezova D, Barak S, Gaburjakova J, Gaburjakova M, Kutna V, Ovsepian SV. Trophic factors as potential therapies for treatment of major mental disorders. Neurosci Lett 2021; 764:136194. [PMID: 34433100 DOI: 10.1016/j.neulet.2021.136194] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 08/02/2021] [Accepted: 08/20/2021] [Indexed: 12/20/2022]
Abstract
Notwithstanding major advances in psychotherapeutics, their efficacy and specificity remain limited. The slow onset of beneficial outcomes and numerous adverse effects of widely used medications remain of chief concern, warranting in-depth studies. The majority of frontline therapies are thought to enhance the endogenous monoaminergic drive, to initiate a cascade of molecular events leading to lasting functional and structural plasticity. They also involve alterations in trophic factor signalling, including brain-derived neurotrophic factor (BDNF), VGF (non-acronymic), vascular endothelial growth factor (VEGF), fibroblast growth factor 2 (FGF2), glial cell-derived neurotrophic factor (GDNF), and others. In several major mental disorders, emerging data suggest protective and restorative effects of trophic factors in preclinical models, when applied on their own. Antidepressant outcomes of VGF and FGF2, for instance, were shown in experimental animals, while BDNF and GDNF prove useful in the treatment of addiction, schizophrenia, and autism spectrum disorders. The main challenge with the effective translation of these and other findings in the clinic is the knowledge gap in action mechanisms with potential risks, as well as the lack of effective platforms for validation under clinical settings. Herein, we review the state-of-the-art and advances in the therapeutic use of trophic factors in several major neuropsychiatric disorders.
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Affiliation(s)
- Eliyahu Dremencov
- Institute of Molecular Physiology and Genetics, Center of Biosciences, Slovak Academy of Sciences, Bratislava, Slovakia.
| | - Daniela Jezova
- Institute of Experimental Endocrinology, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Segev Barak
- School of Psychological Sciences and the Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
| | - Jana Gaburjakova
- Institute of Molecular Physiology and Genetics, Center of Biosciences, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Marta Gaburjakova
- Institute of Molecular Physiology and Genetics, Center of Biosciences, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Viera Kutna
- Department of Experimental Neurobiology, National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic
| | - Saak V Ovsepian
- Department of Experimental Neurobiology, National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic
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Yang* J, Wang* L, Huang L, Che X, Zhang Z, Wang C, Bai L, Liu P, Zhao Y, Hu X, Shi B, Shen Y, Liang X, Wu C, Xue X. Receptor-targeting nanomaterials alleviate binge drinking-induced neurodegeneration as artificial neurotrophins. EXPLORATION (BEIJING, CHINA) 2021; 1:61-74. [PMID: 37366469 PMCID: PMC10291571 DOI: 10.1002/exp.20210004] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 07/07/2021] [Indexed: 06/28/2023]
Abstract
The distinguished properties of nanomaterials promote us to explore whether their intrinsic activities would be beneficial to disease treatment. Furthermore, understanding the molecular mechanism is thereby crucial for biomedical applications. Here, we investigate the therapeutic effects of single-walled carbon nanotubes (SWNTs) in a rat model of binge alcohol-induced neurodegeneration. With selection from four types of SWNT structures, bundled SWNTs (bSWNTs) facilitated the recovery of learning and memory via enhancing neuroprotection and neuroregeneration. We screened the potential target for bSWNTs, and found that bSWNTs have the abilities to directly interact with neurotrophic receptors, especially tropomyosin-related kinase B (TrkB). Moreover, similar to the actions of endogenous neurotrophins, bSWNTs could trigger the dimerization and phosphorylation of TrkB, while these conformational changes resulted in activating their downstream signals involved in neuroprotection and neuroregeneration. With relatively clear mechanisms, these "artificial neurotrophins" provide a proof-of-concept example as an efficiently therapeutic strategy for the treatment of neurodegenerative diseases.
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Affiliation(s)
- Jingyu Yang*
- Department of PharmacologyShenyang Pharmaceutical UniversityShenyangP. R. China
| | - Lirong Wang*
- CAS Key Laboratory of Standardization and Measurement for NanotechnologyNational Center for Nanoscience and Technology of ChinaBeijingP. R. China
| | - Liwen Huang
- State Key Laboratory of Medicinal Chemical BiologyCollege of PharmacyNankai UniversityTianjinP. R. China
| | - Xiaohang Che
- Department of PharmacologyShenyang Pharmaceutical UniversityShenyangP. R. China
| | - Zhen Zhang
- Department of PharmacologyShenyang Pharmaceutical UniversityShenyangP. R. China
| | - Chunxiao Wang
- State Key Laboratory of Medicinal Chemical BiologyCollege of PharmacyNankai UniversityTianjinP. R. China
| | - Lihuan Bai
- State Key Laboratory of Medicinal Chemical BiologyCollege of PharmacyNankai UniversityTianjinP. R. China
| | - Ping Liu
- Department of PharmacologyShenyang Pharmaceutical UniversityShenyangP. R. China
| | - Yanan Zhao
- Department of PharmacologyShenyang Pharmaceutical UniversityShenyangP. R. China
| | - Xiaomei Hu
- Department of PharmacologyShenyang Pharmaceutical UniversityShenyangP. R. China
- CAS Center for Excellence in NanoscienceCAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyNational Center for Nanoscience and Technology of ChinaBeijingP. R. China
| | - Bingyang Shi
- International Joint Center for Biomedical InnovationSchool of Life SciencesHenan UniversityKaifengHenanP. R. China
| | - Yuequan Shen
- State Key Laboratory of Medicinal Chemical BiologyCollege of PharmacyNankai UniversityTianjinP. R. China
| | - Xing‐Jie Liang
- CAS Center for Excellence in NanoscienceCAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyNational Center for Nanoscience and Technology of ChinaBeijingP. R. China
| | - Chunfu Wu
- Department of PharmacologyShenyang Pharmaceutical UniversityShenyangP. R. China
| | - Xue Xue
- State Key Laboratory of Medicinal Chemical BiologyCollege of PharmacyNankai UniversityTianjinP. R. China
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Liu Z, Yan A, Zhao J, Yang S, Song L, Liu Z. The p75 neurotrophin receptor as a novel intermediate in L-dopa-induced dyskinesia in experimental Parkinson's disease. Exp Neurol 2021; 342:113740. [PMID: 33971218 DOI: 10.1016/j.expneurol.2021.113740] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 04/14/2021] [Accepted: 05/04/2021] [Indexed: 12/15/2022]
Abstract
In Parkinson's disease (PD), long-term administration of L-dopa often leads to L-dopa-induced dyskinesia (LID), a debilitating motor complication. The p75 neurotrophin receptor (p75NTR) is likely to play a critical role in the regulation of dendritic spine density and morphology and appears to be associated with neuroinflammation, which previously has been identified as a crucial mechanism in LID. While aberrant modifications of p75NTR in neurological diseases have been extensively documented, only a few studies report p75NTR dysfunction in PD, and no data are available in LID. Here, we explored the functional role of p75NTR in LID. In LID rats, we identified that p75NTR was significantly increased in the lesioned striatum. In 6-hydroxydopamine (6-OHDA)-hemilesioned rats, specific knockdown of striatal p75NTR levels achieved by viral vector injection into the striatum prevented the development of LID and increased striatal structural plasticity. By contrast, we found that in 6-OHDA-hemilesioned rats, striatal p75NTR overexpression exacerbated LID and facilitated striatal dendritic spine losses. Moreover, we observed that the immunomodulatory drug fingolimod attenuated LID without lessening the therapeutic efficacy of L-dopa and normalized p75NTR levels. Together, these data demonstrate for the first time that p75NTR plays a pivotal role in the development of LID and that p75NTR may act as a potential novel target for the management of LID.
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Affiliation(s)
- Zhihua Liu
- Department of Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200082, China
| | - Aijuan Yan
- Department of Neurology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Jiahao Zhao
- Department of Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200082, China
| | - Shuyuan Yang
- Department of Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200082, China
| | - Lu Song
- Department of Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200082, China
| | - Zhenguo Liu
- Department of Neurology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200082, China.
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10
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Ehinger Y, Phamluong K, Darevesky D, Welman M, Moffat JJ, Sakhai SA, Whiteley EL, Berger AL, Laguesse S, Farokhnia M, Leggio L, Lordkipanidzé M, Ron D. Differential correlation of serum BDNF and microRNA content in rats with rapid or late onset of heavy alcohol use. Addict Biol 2021; 26:e12890. [PMID: 32135570 DOI: 10.1111/adb.12890] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 02/13/2020] [Accepted: 02/15/2020] [Indexed: 12/22/2022]
Abstract
Heavy alcohol use reduces the levels of the brain-derived neurotrophic factor (BDNF) in the prefrontal cortex of rodents through the upregulation of microRNAs (miRs) targeting BDNF mRNA. In humans, an inverse correlation exists between circulating blood levels of BDNF and the severity of psychiatric disorders including alcohol abuse. Here, we set out to determine whether a history of heavy alcohol use produces comparable alterations in the blood of rats. We used an intermittent access to 20% alcohol using the two-bottle choice paradigm (IA20%2BC) and measured circulating levels of BDNF protein and miRs targeting BDNF in the serum of Long-Evans rats before and after 8 weeks of excessive alcohol intake. We observed that the drinking profile of heavy alcohol users is not unified, whereas 70% of the rats gradually escalate their alcohol intake (late onset), and 30% of alcohol users exhibit a very rapid onset of drinking (rapid onset). We found that serum BDNF levels are negatively correlated with alcohol intake in both rapid onset and late onset rats. In contrast, increased expression of the miRs targeting BDNF, miR30a-5p, miR-195-5p, miR191-5p and miR206-3p, was detected only in the rapid onset rats. Finally, we report that the alcohol-dependent molecular changes are not due to alterations in platelet number. Together, these data suggest that rats exhibit both late and rapid onset of alcohol intake. We further show that heavy alcohol use produces comparable changes in BDNF protein levels in both groups. However, circulating microRNAs are responsive to alcohol only in the rapid onset rats.
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Affiliation(s)
- Yann Ehinger
- Department of Neurology University of California, San Francisco San Francisco California
| | - Khanhky Phamluong
- Department of Neurology University of California, San Francisco San Francisco California
| | - David Darevesky
- Department of Neurology University of California, San Francisco San Francisco California
| | - Melanie Welman
- Research Center Montreal Heart Institute Montreal Quebec Canada
| | - Jeffrey J. Moffat
- Department of Neurology University of California, San Francisco San Francisco California
| | - Samuel A. Sakhai
- Department of Neurology University of California, San Francisco San Francisco California
| | - Ellanor L. Whiteley
- Department of Neurology University of California, San Francisco San Francisco California
| | - Anthony L. Berger
- Department of Neurology University of California, San Francisco San Francisco California
| | - Sophie Laguesse
- Department of Neurology University of California, San Francisco San Francisco California
| | - Mehdi Farokhnia
- Clinical Psychoneuroendocrinology and Neuropsychopharmacology Section National Institute on Drug Abuse Intramural Research Program Baltimore Maryland
- Medication Development Program, National Institute on Drug Abuse Intramural Research Program National Institutes of Health Baltimore Maryland
- National Institute on Alcohol Abuse and Alcoholism Division of Intramural Clinical and Biological Research National Institutes of Health Bethesda Maryland
| | - Lorenzo Leggio
- Clinical Psychoneuroendocrinology and Neuropsychopharmacology Section National Institute on Drug Abuse Intramural Research Program Baltimore Maryland
- Medication Development Program, National Institute on Drug Abuse Intramural Research Program National Institutes of Health Baltimore Maryland
- Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences Brown University Providence Rhode Island
- National Institute on Alcohol Abuse and Alcoholism Division of Intramural Clinical and Biological Research National Institutes of Health Bethesda Maryland
| | - Marie Lordkipanidzé
- Research Center Montreal Heart Institute Montreal Quebec Canada
- Faculty of Pharmacy University of Montreal Montreal Quebec Canada
| | - Dorit Ron
- Department of Neurology University of California, San Francisco San Francisco California
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11
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Liran M, Rahamim N, Ron D, Barak S. Growth Factors and Alcohol Use Disorder. Cold Spring Harb Perspect Med 2020; 10:cshperspect.a039271. [PMID: 31964648 DOI: 10.1101/cshperspect.a039271] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Neurotrophic growth factors were originally characterized for their support in neuronal differentiation, outgrowth, and survival during development. However, it has been acknowledged that they also play a vital role in the adult brain. Abnormalities in growth factors have been implicated in a variety of neurological and psychiatric disorders, including alcohol use disorder (AUD). This work focuses on the interaction between alcohol and growth factors. We review literature suggesting that several growth factors play a unique role in the regulation of alcohol consumption, and that breakdown in these growth factor systems is linked to the development of AUD. Specifically, we focus on the brain-derived neurotrophic factor (BDNF), glial cell line-derived neurotrophic factor (GDNF), fibroblast growth factor 2 (FGF2), and insulin growth factor 1 (IGF-1). We also review the literature on the potential role of midkine (MDK) and pleiotrophin (PTN) and their receptor, anaplastic lymphoma kinase (ALK), in AUD. We show that alcohol alters the expression of these growth factors or their receptors in brain regions previously implicated in addiction, and that manipulations on these growth factors and their downstream signaling can affect alcohol-drinking behaviors in animal models. We conclude that there is a need for translational and clinical research to assess the therapeutic potential of new pharmacotherapies targeting these systems.
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Affiliation(s)
- Mirit Liran
- Department of Neurobiology, Tel Aviv University, 69978 Tel Aviv, Israel
| | - Nofar Rahamim
- Sagol School of Neuroscience, Tel Aviv University, 69978 Tel Aviv, Israel
| | - Dorit Ron
- Department of Neurology, University of California, 675 Nelson Rising Lane, San Francisco, California 94143-0663, USA
| | - Segev Barak
- Department of Neurobiology, Tel Aviv University, 69978 Tel Aviv, Israel.,Sagol School of Neuroscience, Tel Aviv University, 69978 Tel Aviv, Israel.,School of Psychological Sciences, Tel Aviv University, 69978 Tel Aviv, Israel
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12
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Up-regulation of the p75 neurotrophin receptor is an essential mechanism for HIV-gp120 mediated synaptic loss in the striatum. Brain Behav Immun 2020; 89:371-379. [PMID: 32717404 PMCID: PMC7572812 DOI: 10.1016/j.bbi.2020.07.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 07/10/2020] [Accepted: 07/19/2020] [Indexed: 12/11/2022] Open
Abstract
Reduced synaptodendritic complexity appears to be a key feature in human immunodeficiency virus (HIV)-associated neurological disorder (HAND). Viral proteins, and in particular the envelope protein gp120, play a role in the pathology of synapses. Gp120 has been shown to increase both in vitro and in vivo the proneurotrophin brain-derived neurotrophic factor, which promotes synaptic simplification through the activation of the p75 neurotrophin receptor (p75NTR). To provide evidence that p75NTR plays a role in gp120-mediated loss of synapses in vivo, we intercrossed gp120tg mice with p75NTR null mice and used molecular, histological and behavioral analyses to establish a link between p75NTR and gp120-mediated synaptic simplification. Synaptosomes obtained from the striatum of gp120tg mice exhibited a significant increase in p75NTR levels concomitantly to a decrease in synaptic markers such as TrkB and PSD95. Analysis of striatal dendritic spines by Golgi staining revealed that gp120tg mice display a reduced proportion of mushroom-type spines in addition to fewer spines overall, when compared to wild type or gp120tg lacking one or two p75NTR alleles. Moreover, removal of one p75NTR allele in gp120 transgenic mice abolished the gp120-driven impairment on a task of striatal-dependent motor learning. These data indicate that p75NTR could be a key player in HIV-mediated synaptic simplification in the striatum.
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13
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Popova NK, Ilchibaeva TV, Antonov EV, Pershina AV, Bazovkina DV, Naumenko VS. On the interaction between BDNF and serotonin systems: The effects of long-term ethanol consumption in mice. Alcohol 2020; 87:1-15. [PMID: 32330588 DOI: 10.1016/j.alcohol.2020.04.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/14/2020] [Accepted: 04/14/2020] [Indexed: 01/02/2023]
Abstract
We investigated the effect of chronic (6 weeks) consumption of 10% alcohol on the principal elements of BDNF (BDNF, proBDNF, p75, and TrkB receptors) and 5-HT (5-HT, 5-HIAA, tryptophan hydroxylase-2 [Tph-2], 5-HT transporter [5-HTT], 5-HT1A, 5-HT2A, and 5-HT7 receptors) systems in the brain of C57Bl/6 mice. BDNF mRNA level in the raphe nuclei area and BDNF protein level in the hippocampus were lowered in ethanol-treated mice. The increase in proBDNF protein level in the raphe nuclei area, cortex, and amygdala and the increase of p75 receptor protein levels in the raphe nuclei area were revealed after ethanol exposure. Alcohol intake reduced the protein level and increased the activity of Tph-2, the key enzyme for serotonin biosynthesis in the brain, and increased the main 5-HT metabolite 5-HIAA level and 5-HIAA/5-НТ ratio as well as the 5-HT7 receptor mRNA level in the raphe nuclei area. In the cortex, 5-HT2A receptor protein level was reduced, and 5-HIAA/5-HT ratio was increased. These data showed considerable impact of alcoholization on the BDNF system, resulting in proBDNF and p75 receptor expression enhancement. Alcohol-induced changes in BDNF and 5-HT systems were revealed in the raphe nuclei area where the majority of the cell bodies of the 5-HT neurons are localized, as well as in the cortex, hippocampus, and amygdala. Our data suggest that the BDNF/5-HT interaction contributes to the mechanism underlying chronic alcohol-induced neurodegenerative disorders.
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14
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Blanco AM, Bertucci JI, Hatef A, Unniappan S. Feeding and food availability modulate brain-derived neurotrophic factor, an orexigen with metabolic roles in zebrafish. Sci Rep 2020; 10:10727. [PMID: 32612127 PMCID: PMC7329848 DOI: 10.1038/s41598-020-67535-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 06/10/2020] [Indexed: 12/13/2022] Open
Abstract
Emerging findings point to a role for brain-derived neurotrophic factor (BDNF) on feeding in mammals. However, its role on energy balance is unclear. Moreover, whether BDNF regulates energy homeostasis in non-mammals remain unknown. This research aimed to determine whether BDNF is a metabolic peptide in zebrafish. Our results demonstrate that BDNF mRNAs and protein, as well as mRNAs encoding its receptors trkb2, p75ntra and p75ntrb, are detectable in the zebrafish brain, foregut and liver. Intraperitoneal injection of BDNF increased food intake at 1, 2 and 6 h post-administration, and caused an upregulation of brain npy, agrp and orexin, foregut ghrelin, and hepatic leptin mRNAs, and a reduction in brain nucb2. Fasting for 7 days increased bdnf and p75ntrb mRNAs in the foregut, while decreased bdnf, trkb2, p75ntra and p75ntrb mRNAs in the brain and liver. Additionally, the expression of bdnf and its receptors increased preprandially, and decreased after a meal in the foregut and liver. Finally, we observed BDNF-induced changes in the expression and/or activity of enzymes involved in glucose and lipid metabolism in the liver. Overall, present results indicate that BDNF is a novel regulator of appetite and metabolism in fish, which is modulated by energy intake and food availability.
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Affiliation(s)
- Ayelén Melisa Blanco
- Laboratory of Integrative Neuroendocrinology, Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, Vigo, Pontevedra, Spain
| | - Juan Ignacio Bertucci
- Laboratory of Integrative Neuroendocrinology, Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada
| | - Azadeh Hatef
- Laboratory of Integrative Neuroendocrinology, Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada
| | - Suraj Unniappan
- Laboratory of Integrative Neuroendocrinology, Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, S7N 5B4, Canada.
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15
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Abstract
The receptor tyrosine kinases (RTKs) are a large family of proteins that transduce extracellular signals to the inside of the cell to ultimately affect important cellular functions such as cell proliferation, survival, apoptosis, differentiation, and migration. They are expressed in the nervous system and can regulate behavior through modulation of neuronal and glial function. As a result, RTKs are implicated in neurodegenerative and psychiatric disorders such as depression and addiction. Evidence has emerged that 5 RTKs (tropomyosin-related kinase B (TrkB), RET proto-oncogene (RET), anaplastic lymphoma kinase (ALK), fibroblast growth factor receptor (FGFR), and epidermal growth factor receptor (EGFR)) modulate alcohol drinking and other behaviors related to alcohol addiction. RTKs are considered highly "druggable" targets and small-molecule inhibitors of RTKs have been developed for the treatment of various conditions, particularly cancer. These kinases are therefore attractive targets for the development of new pharmacotherapies to treat alcohol use disorder (AUD). This review will examine the preclinical evidence describing TrkB, RET, ALK, FGFR, and EGFR modulation of alcohol drinking and other behaviors relevant to alcohol abuse.
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Affiliation(s)
- Kana Hamada
- Department of Psychiatry and Center for Alcohol Research in Epigenetics, University of Illinois at Chicago, 1601 West Taylor Street, MC 912, Chicago, Illinois, 60612, USA
| | - Amy W Lasek
- Department of Psychiatry and Center for Alcohol Research in Epigenetics, University of Illinois at Chicago, 1601 West Taylor Street, MC 912, Chicago, Illinois, 60612, USA.
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16
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Olsen D, Kaas M, Lundhede J, Molgaard S, Nykjær A, Kjolby M, Østergaard SD, Glerup S. Reduced Alcohol Seeking and Withdrawal Symptoms in Mice Lacking the BDNF Receptor SorCS2. Front Pharmacol 2019; 10:499. [PMID: 31156431 PMCID: PMC6533533 DOI: 10.3389/fphar.2019.00499] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 04/18/2019] [Indexed: 11/13/2022] Open
Abstract
Alcohol use disorder (AUD) is characterized by repetitive and uncontrolled intake of alcohol with severe consequences for affected individuals, their families and society as a whole. Numerous studies have implicated brain-derived neurotrophic factor (BDNF) activity in the neurobiology underlying AUD. The BDNF signaling mechanism is complex and depends on two receptor systems, TrkB and p75NTR, which appear to have opposite effects on alcohol seeking behavior in animal models. We recently discovered that the sortilin-related receptor SorCS2 forms complexes with both TrkB and p75NTR and is important for BDNF activity in the developing and adult CNS. Moreover, the SORCS2 gene was recently identified as the top association signal for severity of alcohol withdrawal symptoms. Hence, we speculated that SorCS2 deficient mice would have an altered response to alcohol. The role of SorCS2 in the acute and adapted response to alcohol was therefore investigated by comparing SorCS2 knockout (Sorcs2-/- ) mice to wild type (WT) mice in three paradigms modeling alcohol sensitivity and consumption; alcohol-induced conditioned place preference, two-bottle choice test as well as the behavioral response to alcohol withdrawal. We found that, when compared to the WT mice, (I) Sorcs2-/- mice displayed complete lack of alcohol-induced place preference, (II) when given free choice between water and alcohol, Sorcs2-/- mice consumed less alcohol, and (III) Sorcs2-/- mice showed no handling-induced convulsion in response to alcohol withdrawal following extended alcohol exposure. Taken together, these results show that lack of the alcohol withdrawal risk gene Sorcs2 results in abnormal behavioral response to alcohol in mice. Consequently, SorCS2 may play an important role in the molecular pathways underlying AUD and complications associated with alcohol withdrawal.
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Affiliation(s)
- Ditte Olsen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Mathias Kaas
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Jesper Lundhede
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Simon Molgaard
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Anders Nykjær
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Biomedicine, Nordic EMBL Partnership for Molecular Medicine, DANDRITE - Danish Research Institute of Translational Neuroscience, Aarhus University, Aarhus, Denmark.,Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark.,The Danish National Research Foundation Center PROMEMO, Aarhus University, Aarhus, Denmark
| | - Mads Kjolby
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Biomedicine, Nordic EMBL Partnership for Molecular Medicine, DANDRITE - Danish Research Institute of Translational Neuroscience, Aarhus University, Aarhus, Denmark.,Danish Diabetes Academy, Novo Nordisk Foundation, Aarhus, Denmark
| | - Søren D Østergaard
- Department of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark.,Department of Affective Disorders, Aarhus University Hospital - Psychiatry, Aarhus, Denmark.,The Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, Aarhus, Denmark
| | - Simon Glerup
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
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17
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Cadet JL, Patel R, Jayanthi S. Compulsive methamphetamine taking and abstinence in the presence of adverse consequences: Epigenetic and transcriptional consequences in the rat brain. Pharmacol Biochem Behav 2019; 179:98-108. [PMID: 30797763 DOI: 10.1016/j.pbb.2019.02.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/04/2019] [Accepted: 02/20/2019] [Indexed: 02/06/2023]
Abstract
Methamphetamine addiction is characterized by compulsive binges of drug intake despite adverse life consequences. A model of methamphetamine self-administration that includes contingent footshocks to constitute adverse consequences has helped to segregate rats that reduce or stop lever pressing for methamphetamine (sensitive) from those that continue to lever press for the drug (resistant) in the presence of negative outcomes. We have observed differential DNA hydroxymethylation and increased expression of potassium channel mRNAs in the nucleus accumbens of sensitive compared to resistant rats, suggesting a role of these channels in suppressing methamphetamine intake. There were also significant increases in nerve growth factor (NGF) expression and activation of its downstream signaling pathway (NGF-TrkA and p75NTR/MAPK signaling) in only the dorsal striatum of sensitive rats after a month of abstinence. In contrast, oxytocin mRNA expression was increased in only the nucleus accumbens of resistant rats compared to sensitive rats euthanized after that time. These results indicate that footshocks can differentiate two behavioral phenotypes with differential biochemical and epigenetic consequences in the ventral and dorsal striatum.
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Affiliation(s)
- Jean Lud Cadet
- Molecular Neuropsychiatry Research Branch, NIDA Intramural Research Program, Baltimore, MD, USA.
| | - Ravish Patel
- Molecular Neuropsychiatry Research Branch, NIDA Intramural Research Program, Baltimore, MD, USA
| | - Subramaniam Jayanthi
- Molecular Neuropsychiatry Research Branch, NIDA Intramural Research Program, Baltimore, MD, USA
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18
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Mitra S, Behbahani H, Eriksdotter M. Innovative Therapy for Alzheimer's Disease-With Focus on Biodelivery of NGF. Front Neurosci 2019; 13:38. [PMID: 30804738 PMCID: PMC6370742 DOI: 10.3389/fnins.2019.00038] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 01/15/2019] [Indexed: 12/31/2022] Open
Abstract
Alzheimer’s disease (AD) is a progressive neurodegenerative disorder associated with abnormal protein modification, inflammation and memory impairment. Aggregated amyloid beta (Aβ) and phosphorylated tau proteins are medical diagnostic features. Loss of memory in AD has been associated with central cholinergic dysfunction in basal forebrain, from where the cholinergic circuitry projects to cerebral cortex and hippocampus. Various reports link AD progression with declining activity of cholinergic neurons in basal forebrain. The neurotrophic molecule, nerve growth factor (NGF), plays a major role in the maintenance of cholinergic neurons integrity and function, both during development and adulthood. Numerous studies have also shown that NGF contributes to the survival and regeneration of neurons during aging and in age-related diseases such as AD. Changes in neurotrophic signaling pathways are involved in the aging process and contribute to cholinergic and cognitive decline as observed in AD. Further, gradual dysregulation of neurotrophic factors like NGF and brain derived neurotrophic factor (BDNF) have been reported during AD development thus intensifying further research in targeting these factors as disease modifying therapies against AD. Today, there is no cure available for AD and the effects of the symptomatic treatment like cholinesterase inhibitors (ChEIs) and memantine are transient and moderate. Although many AD treatment studies are being carried out, there has not been any breakthrough and new therapies are thus highly needed. Long-term effective therapy for alleviating cognitive impairment is a major unmet need. Discussion and summarizing the new advancements of using NGF as a potential therapeutic implication in AD are important. In summary, the intent of this review is describing available experimental and clinical data related to AD therapy, priming to gain additional facts associated with the importance of NGF for AD treatment, and encapsulated cell biodelivery (ECB) as an efficient tool for NGF delivery.
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Affiliation(s)
- Sumonto Mitra
- Division of Clinical Geriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Huddinge, Sweden
| | - Homira Behbahani
- Division of Neurogeriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Solna, Sweden
| | - Maria Eriksdotter
- Division of Clinical Geriatrics, Center for Alzheimer Research, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Huddinge, Sweden.,Aging Theme, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
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19
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Colville AM, Iancu OD, Lockwood DR, Darakjian P, McWeeney SK, Searles R, Zheng C, Hitzemann R. Regional Differences and Similarities in the Brain Transcriptome for Mice Selected for Ethanol Preference From HS-CC Founders. Front Genet 2018; 9:300. [PMID: 30210525 PMCID: PMC6120986 DOI: 10.3389/fgene.2018.00300] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 07/17/2018] [Indexed: 12/16/2022] Open
Abstract
The high genetic complexity found in heterogeneous stock (HS-CC) mice, together with selective breeding, can be used to detect new pathways and mechanisms associated with ethanol preference and excessive ethanol consumption. We predicted that these pathways would provide new targets for therapeutic manipulation. Previously (Colville et al., 2017), we observed that preference selection strongly affected the accumbens shell (SH) genes associated with synaptic function and in particular genes associated with synaptic tethering. Here we expand our analyses to include substantially larger sample sizes and samples from two additional components of the “addiction circuit,” the central nucleus of the amygdala (CeA) and the prelimbic cortex (PL). At the level of differential expression (DE), the majority of affected genes are region-specific; only in the CeA did the DE genes show a significant enrichment in GO annotation categories, e.g., neuron part. In all three brain regions the differentially variable genes were significantly enriched in a single network module characterized by genes associated with cell-to-cell signaling. The data point to glutamate plasticity as being a key feature of selection for ethanol preference. In this context the expression of Dlg2 which encodes for PSD-93 appears to have a key role. It was also observed that the expression of the clustered protocadherins was strongly associated with preference selection.
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Affiliation(s)
- Alexandre M Colville
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, United States
| | - Ovidiu D Iancu
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, United States
| | - Denesa R Lockwood
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, United States
| | - Priscila Darakjian
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, United States
| | - Shannon K McWeeney
- Department of Medical Informatics and Clinical Epidemiology, Oregon Health & Science University, Portland, OR, United States
| | - Robert Searles
- Integrated Genomics Laboratory, Oregon Health & Science University, Portland, OR, United States
| | - Christina Zheng
- Department of Medical Informatics and Clinical Epidemiology, Oregon Health & Science University, Portland, OR, United States.,Knight Cancer Institute, Oregon Health & Science University, Portland, OR, United States
| | - Robert Hitzemann
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, United States
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20
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Li X, Carreria MB, Witonsky KF, Zeric T, Lofaro OM, Bossert JM, Zhang J, Surjono F, Richie CT, Harvey BK, Son H, Cowan CW, Nestler EJ, Shaham Y. Role of Dorsal Striatum Histone Deacetylase 5 in Incubation of Methamphetamine Craving. Biol Psychiatry 2018; 84:213-222. [PMID: 29397902 PMCID: PMC6026084 DOI: 10.1016/j.biopsych.2017.12.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 11/28/2017] [Accepted: 12/08/2017] [Indexed: 12/12/2022]
Abstract
BACKGROUND Methamphetamine (meth) seeking progressively increases after withdrawal (incubation of meth craving). We previously demonstrated an association between histone deacetylase 5 (HDAC5) gene expression in the rat dorsal striatum and incubation of meth craving. Here we used viral constructs to study the causal role of dorsal striatum HDAC5 in this incubation. METHODS In experiment 1 (overexpression), we injected an adeno-associated virus bilaterally into dorsal striatum to express either green fluorescent protein (control) or a mutant form of HDAC5, which strongly localized to the nucleus. After training rats to self-administer meth (10 days, 9 hours/day), we tested the rats for relapse to meth seeking on withdrawal days 2 and 30. In experiment 2 (knockdown), we injected an adeno-associated virus bilaterally into the dorsal striatum to express a short hairpin RNA either against luciferase (control) or against HDAC5. After training rats to self-administer meth, we tested the rats for relapse on withdrawal days 2 and 30. We also measured gene expression of other HDACs and potential HDAC5 downstream targets. RESULTS We found that HDAC5 overexpression in dorsal striatum increased meth seeking on withdrawal day 30 but not day 2. In contrast, HDAC5 knockdown in the dorsal striatum decreased meth seeking on withdrawal day 30 but not on day 2; this manipulation also altered other HDACs (Hdac1 and Hdac4) and potential HDAC5 targets (Gnb4 and Suv39h1). CONCLUSIONS Results demonstrate a novel role of dorsal striatum HDAC5 in incubation of meth craving. These findings also set up future work to identify HDAC5 targets that mediate this incubation.
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Affiliation(s)
- Xuan Li
- Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Department of Health and Human Services, Baltimore, Maryland.
| | - Maria B. Carreria
- Neuroscience Graduate Program, University of Texas Southwestern Medical Center, Dallas, TX
| | | | - Tamara Zeric
- Intramural Research Program, NIDA, NIH, DHHS, Baltimore, MD
| | | | | | - Jianjun Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China
| | | | | | | | - Hyeon Son
- Department of Biochemistry and Molecular Biology, College of Medicine, Hanyang University, Korea
| | - Christopher W. Cowan
- Department of Neuroscience, Medical University of South Carolina, Charleston, MA
| | - Eric J. Nestler
- Fishberg Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Yavin Shaham
- Intramural Research Program, NIDA, NIH, DHHS, Baltimore, MD
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21
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Increasing Brain-Derived Neurotrophic Factor (BDNF) in medial prefrontal cortex selectively reduces excessive drinking in ethanol dependent mice. Neuropharmacology 2018; 140:35-42. [PMID: 30056122 DOI: 10.1016/j.neuropharm.2018.07.031] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 07/05/2018] [Accepted: 07/26/2018] [Indexed: 01/18/2023]
Abstract
The neurotrophin Brain-Derived Neurotrophic Factor (BDNF) has been implicated in a number of neuropsychiatric disorders, including alcohol use disorder. Studies have shown that BDNF activity in cortical regions, such as the medial prefrontal cortex (mPFC) mediates various ethanol-related behaviors. We previously reported a significant down-regulation in Bdnf mRNA in mPFC following chronic ethanol exposure compared to control mice. The present study was conducted to extend these findings by examining whether chronic ethanol treatment reduces BDNF protein expression in mPFC and whether reversing this deficit via direct injection of BDNF or viral-mediated overexpression of BDNF in mPFC alters voluntary ethanol consumption in dependent and nondependent mice. Repeated cycles of chronic intermittent ethanol (CIE) exposure was employed to model ethanol dependence, which produces robust escalation of ethanol intake. Results indicated that CIE treatment significantly increased ethanol intake and this was accompanied by a significant decrease in BDNF protein in mPFC that lasted at least 72 h after CIE exposure. In a separate study, once dependence-related increased drinking was established, bilateral infusion of BDNF (0, 0.25, 0.50 μg) into mPFC significantly decreased ethanol intake in a dose-related manner in dependent mice but did not affect moderate drinking in nondependent mice. In a third study, viral-mediated overexpression of BDNF in mPFC prevented escalation of drinking in dependent mice but did not alter intake in nondependent mice. Collectively, these results provide evidence that adaptations in cortical (mPFC) BDNF activity resulting from chronic ethanol exposure play a role in mediating excessive ethanol drinking associated with dependence.
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22
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Animal models of binge drinking, current challenges to improve face validity. Neurosci Biobehav Rev 2018; 106:112-121. [PMID: 29738795 DOI: 10.1016/j.neubiorev.2018.05.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 03/29/2018] [Accepted: 05/01/2018] [Indexed: 01/08/2023]
Abstract
Binge drinking (BD), i.e., consuming a large amount of alcohol in a short period of time, is an increasing public health issue. Though no clear definition has been adopted worldwide the speed of drinking seems to be a keystone of this behavior. Developing relevant animal models of BD is a priority for gaining a better characterization of the neurobiological and psychobiological mechanisms underlying this dangerous and harmful behavior. Until recently, preclinical research on BD has been conducted mostly using forced administration of alcohol, but more recent studies used scheduled access to alcohol, to model more voluntary excessive intakes, and to achieve signs of intoxications that mimic the human behavior. The main challenges for future research are discussed regarding the need of good face validity, construct validity and predictive validity of animal models of BD.
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23
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The neurokinin-1 receptor mediates escalated alcohol intake induced by multiple drinking models. Neuropharmacology 2018; 137:194-201. [PMID: 29758386 DOI: 10.1016/j.neuropharm.2018.05.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 04/30/2018] [Accepted: 05/02/2018] [Indexed: 12/16/2022]
Abstract
We have previously demonstrated that the neurokinin-1 receptor (NK1R) is upregulated in the central nucleus of the amygdala of alcohol preferring (P) rats and that this receptor mediates escalated alcohol consumption in this strain. However, it is unclear if non-genetic models of escalated consumption are also mediated by NK1R signaling, and if so, what brain regions govern this effect. In the experiments presented here, we use two methods of inducing escalated alcohol intake in outbred Wistar rats: yohimbine pretreatment and intermittent alcohol access (Monday, Wednesday, and Friday availability; 20% alcohol). We found that escalated alcohol consumption induced by both yohimbine injection and intermittent access is attenuated by systemic administration of the NK1R antagonist L822429. Also, when compared to continuous alcohol access or access to water alone, NK1R expression was increased in the nucleus accumbens (NAC) and dorsal striatum, but not the amygdala. Escalated consumption induced by intermittent access was attenuated when the NK1R antagonist L822429 was infused directly into the dorsal striatum, but not when infused into the NAC. Taken together, these results suggest that NK1R upregulation contributes to escalated alcohol consumption that is induced by genetic selection, yohimbine injection, and intermittent access. However there is a dissociation between the regions involved in these behaviors with amygdalar upregulation contributing to genetic predisposition to escalated consumption and striatal upregulation driving escalation that is induced by environmental exposures.
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Campbell EJ, Flanagan JPM, Marchant NJ, Lawrence AJ. Reduced alcohol-seeking in male offspring of sires exposed to alcohol self-administration followed by punishment-imposed abstinence. Pharmacol Res Perspect 2018; 6:e00384. [PMID: 29468070 PMCID: PMC5813436 DOI: 10.1002/prp2.384] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 01/03/2018] [Indexed: 01/24/2023] Open
Abstract
Emerging evidence has demonstrated that paternal alcohol use can modify the behavior of offspring, particularly male offspring. However, preclinical studies to date have not used voluntary self-administration of alcohol to examine alcohol-related behaviors in offspring. Here, we tested the hypothesis that paternal alcohol self-administration followed by punishment-imposed abstinence alters alcohol consumption and seeking in male offspring. Male inbred alcohol preferring iP rats were trained to self-administer alcohol in one context followed by punishment-imposed suppression of alcohol-seeking in a different context using contingent footshock. Following this, all rats were bred with alcohol naïve female iP rats. F1 offspring were then trained to self-administer alcohol in an identical operant paradigm as sires. Alcohol intake and self-administration behaviors of alcohol-sired offspring were compared to control-sired offspring whose fathers had not been exposed to the alcohol operant conditioning experience. We found that paternal alcohol self-administration reduced context-induced relapse to alcohol-seeking in male offspring. These findings indicate that voluntary paternal alcohol experience, operant conditioning, and punishment can result in intergenerational changes in offspring behavior, and that this effect may protect against the vulnerability to relapse after alcohol use. We also noted reduced alcohol responding in the punishment-associated context in alcohol-sired offspring, suggesting altered perception of punishment sensitivity or the anxiogenic response to footshock. Collectively, these findings provide evidence that paternal alcohol abuse can impact alcohol-related behaviors in male offspring.
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Affiliation(s)
- Erin J. Campbell
- The Florey Institute of Neuroscience and Mental HealthParkvilleVictoriaAustralia
- Florey Department of Neuroscience and Mental HealthThe University of MelbourneVictoriaAustralia
| | - Jeremy P. M. Flanagan
- The Florey Institute of Neuroscience and Mental HealthParkvilleVictoriaAustralia
- Florey Department of Neuroscience and Mental HealthThe University of MelbourneVictoriaAustralia
| | - Nathan J. Marchant
- The Florey Institute of Neuroscience and Mental HealthParkvilleVictoriaAustralia
- Florey Department of Neuroscience and Mental HealthThe University of MelbourneVictoriaAustralia
- Department of Anatomy & NeurosciencesVU University Medical CenterAmsterdamThe Netherlands
| | - Andrew J. Lawrence
- The Florey Institute of Neuroscience and Mental HealthParkvilleVictoriaAustralia
- Florey Department of Neuroscience and Mental HealthThe University of MelbourneVictoriaAustralia
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Abstract
Alcohol dependence is a worldwide problem with a great social and economic burden in many countries. A number of studies have suggested that BDNF (mature BDNF) and its precursor (proBDNF) play important roles in the alcohol dependence. However, what roles of the mBDNF/proBDNF pathways play during the pathological process of alcohol dependence are not clearly understood. In our clinical study, peripheral blood was sampled from 30 male patients with alcohol dependence and 50 healthy males (as control). The protein levels of proBDNF, p75NTR, sortilin, mBDNF, TrkB and mRNA levels of BDNF, p75NTR, sortilin, and TrkB were detected in the peripheral blood in our study. We found that the protein levels of proBDNF and p75NTR were increased, but not the sortilin protein level; while the TrkB protein level was decreased in the alcohol dependence patients compared with healthy controls. Moreover, the mRNA levels of p75NTR and sortilin from the lymphocytes were slightly increased; while BDNF and TrkB were significantly decreased. The ELISA results of mBDNF and TrkB were declined in the alcohol dependence group. The levels of mBDNF and TrkB were negatively correlated with the average amount of daily ethanol consumption, and the levels of proBDNF, p75NTR and sortilin were positively correlated with the average amount of ethanol consumption per day. The ratio of proBDNF to mBDNF was altered in alcohol dependence patients. The balance between the proBDNF/p75NTR and mBDNF/TrkB signalling pathways appeared dysregulated in alcohol dependence. Our results suggested that both pathways may participate in the complex processes of alcohol dependence.
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Brain-derived neurotrophic factor (BDNF) determines a sex difference in cue-conditioned alcohol seeking in rats. Behav Brain Res 2018; 339:73-78. [DOI: 10.1016/j.bbr.2017.11.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 11/14/2017] [Accepted: 11/16/2017] [Indexed: 11/23/2022]
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Robins MT, Chiang T, Mores KL, Alongkronrusmee D, van Rijn RM. Critical Role for G i/o-Protein Activity in the Dorsal Striatum in the Reduction of Voluntary Alcohol Intake in C57Bl/6 Mice. Front Psychiatry 2018; 9:112. [PMID: 29686629 PMCID: PMC5900748 DOI: 10.3389/fpsyt.2018.00112] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 03/19/2018] [Indexed: 12/21/2022] Open
Abstract
The transition from non-dependent alcohol use to alcohol dependence involves increased activity of the dorsal striatum. Interestingly, the dorsal striatum expresses a large number of inhibitory G-protein-coupled receptors (GPCRs), which when activated may inhibit alcohol-induced increased activity and can decrease alcohol consumption. Here, we explore the hypothesis that dorsal striatal Gi/o-protein activation is sufficient to reduce voluntary alcohol intake. Using a voluntary, limited-access, two-bottle choice, drink-in-the-dark model of alcohol (10%) consumption, we validated the importance of Gi/o signaling in this region by locally expressing neuron-specific, adeno-associated-virus encoded Gi/o-coupled muscarinic M4 designer receptors exclusively activated by designer drugs (DREADD) in the dorsal striatum and observed a decrease in alcohol intake upon DREADD activation. We validated our findings by activating Gi/o-coupled delta-opioid receptors (DORs), which are natively expressed in the dorsal striatum, using either a G-protein biased agonist or a β-arrestin-biased agonist. Local infusion of TAN-67, an in vitro-determined Gi/o-protein biased DOR agonist, decreased voluntary alcohol intake in wild-type and β-arrestin-2 knockout (KO) mice. SNC80, a β-arrestin-2 biased DOR agonist, increased alcohol intake in wild-type mice; however, SNC80 decreased alcohol intake in β-arrestin-2 KO mice, thus resulting in a behavioral outcome generally observed for Gi/o-biased agonists and suggesting that β-arrestin recruitment is required for SNC80-increased alcohol intake. Overall, these results suggest that activation Gi/o-coupled GPCRs expressed in the dorsal striatum, such as the DOR, by G-protein biased agonists may be a potential strategy to decrease voluntary alcohol consumption and β-arrestin recruitment is to be avoided.
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Affiliation(s)
- Meridith T Robins
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, United States.,Purdue University Institute for Integrative Neuroscience, Purdue University, West Lafayette, IN, United States
| | - Terrance Chiang
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, United States.,Purdue University Institute for Integrative Neuroscience, Purdue University, West Lafayette, IN, United States
| | - Kendall L Mores
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, United States
| | - Doungkamol Alongkronrusmee
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, United States.,Purdue University Institute for Integrative Neuroscience, Purdue University, West Lafayette, IN, United States
| | - Richard M van Rijn
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, United States.,Purdue University Institute for Integrative Neuroscience, Purdue University, West Lafayette, IN, United States
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Targeting the intracellular signaling "STOP" and "GO" pathways for the treatment of alcohol use disorders. Psychopharmacology (Berl) 2018; 235:1727-1743. [PMID: 29654346 PMCID: PMC5949137 DOI: 10.1007/s00213-018-4882-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 03/12/2018] [Indexed: 12/12/2022]
Abstract
In recent years, research has identified the molecular and neural substrates underlying the transition of moderate "social" consumption of alcohol to the characteristic alcohol use disorder (AUD) phenotypes including excessive and compulsive alcohol use which we define in the review as the GO signaling pathways. In addition, growing evidence points to the existence of molecular mechanisms that keep alcohol consumption in check and that confer resilience for the development of AUD which we define herein as the STOP signaling pathways. In this review, we focus on examples of the GO and the STOP intracellular signaling pathways and discuss our current knowledge of how manipulations of these pathways may be used for the treatment of AUD.
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Torres OV, Jayanthi S, McCoy MT, Cadet JL. Selective Activation of Striatal NGF-TrkA/p75NTR/MAPK Intracellular Signaling in Rats That Show Suppression of Methamphetamine Intake 30 Days following Drug Abstinence. Int J Neuropsychopharmacol 2017; 21:281-290. [PMID: 29165617 PMCID: PMC5838829 DOI: 10.1093/ijnp/pyx105] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 11/16/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND The continuing epidemic of methamphetamine addiction has prompted research aimed at understanding striatal dysfunctions potentially associated with long-term methamphetamine use. METHODS Here, we investigated transcriptional and translational alterations in the expression of neurotrophic factors in the rat striatum at 30 days following methamphetamine self-administration and footshock punishment. Male Sprague-Dawley rats were trained to self-administer methamphetamine (0.1 mg/kg/injection, i.v.) or saline during twenty-two 9-hour sessions. Subsequently, rats were subjected to incremental footshocks for 13 additional methamphetamine self-administration sessions. This paradigm led to the identification of rats with shock-resistant and shock-sensitive phenotypes. Thirty days following the last footshock session, the dorsal striatum was dissected and processed for gene expression and protein analyses. RESULTS PCR arrays revealed significant differences in neurotrophins and their receptors between the 2 phenotypes. Brain-derived neurotrophic factor and nerve growth factor protein levels were increased in the dorsal striatum of both shock-resistant and shock-sensitive rats. However, neurotrophic receptor tyrosine kinase 1 phosphorylation and nerve growth factor receptor protein expression were increased only in the shock-sensitive phenotype. Moreover, shock-sensitive rats showed increased abundance of several phosphorylated proteins known to participate in Ras/Raf/MEK/ERK signaling cascade including cRaf, ERK1/2, MSK1, and CREB. CONCLUSIONS These findings support the notion that animals with distinct phenotypes for methamphetamine intake in the presence of adverse consequences also display differential changes in an intracellular signaling cascade activated by nerve growth factor-TrkA/p75NTR interactions. Thus, the development of pharmacological agents that can activate nerve growth factor-dependent pathways may be a promising therapeutic approach to combat methamphetamine addiction.
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Affiliation(s)
- Oscar V Torres
- Molecular Neuropsychiatry Research Branch, DHHS/NIH/NIDA Intramural Research Program, Baltimore, Maryland
| | - Subramaniam Jayanthi
- Molecular Neuropsychiatry Research Branch, DHHS/NIH/NIDA Intramural Research Program, Baltimore, Maryland
| | - Michael T McCoy
- Molecular Neuropsychiatry Research Branch, DHHS/NIH/NIDA Intramural Research Program, Baltimore, Maryland
| | - Jean Lud Cadet
- Molecular Neuropsychiatry Research Branch, DHHS/NIH/NIDA Intramural Research Program, Baltimore, Maryland,Correspondence: Jean Lud Cadet, MD, Chief, Molecular Neuropsychiatry Research Branch, DHHS/NIH/NIDA IRP, 251 Bayview Boulevard, Baltimore, MD 21224 ()
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McGraw JJ, Zona LC, Cromwell HC. The effects of ethanol on diverse components of choice in the rat: reward discrimination, preference and relative valuation. Eur J Neurosci 2017. [PMID: 28639261 DOI: 10.1111/ejn.13627] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Alcohol consumption impairs judgment and choice. How alcohol alters these crucial processes is primarily unknown. Choice can be fractionated into different components including reward discrimination, preference and relative valuation that can function together or in isolation depending upon diverse factors including choice context. We examined the diverse components and contextual effects by analyzing the effects of alcohol drinking on choice behavior in a task with a reduced level of temporal and spatial constraints. Rats were trained to drink 10% ethanol during 6 weeks of behavior testing using a combined sucrose-fade and two-bottle free-choice procedure. Two different sucrose pellet outcomes (e.g., constant vs. variable) were presented each week to examine the impact of voluntary drinking on reward-based decision-making. Behavioral contexts of single option, free choice and extinction were examined for each outcome set. Comparisons were made between alcohol and control groups and within the alcohol group over time to inspect choice profiles. Between-group results showed alcohol drinking animals expressed altered place preference and modified sucrose reward approach latencies. The within-group profile showed that alcohol drinking animals can express adequate reward discrimination, preference and incentive contrast during free choice. All of these components were significantly reduced during the context of extinction. Control animals were also impacted by extinction but not as severely. The findings point to a need for a greater focus on the context and the diverse components of choice when examining external and internal factors influencing decision-making during alcohol or other substance of abuse exposure.
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Affiliation(s)
- Justin J McGraw
- J.P. Scott Center for Neuroscience, Mind and Behavior and Department of Psychology, Bowling Green State University, Bowling Green, OH, USA
| | - Luke C Zona
- J.P. Scott Center for Neuroscience, Mind and Behavior and Department of Psychology, Bowling Green State University, Bowling Green, OH, USA
| | - Howard C Cromwell
- J.P. Scott Center for Neuroscience, Mind and Behavior and Department of Psychology, Bowling Green State University, Bowling Green, OH, USA
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Kimbrough A, Kim S, Cole M, Brennan M, George O. Intermittent Access to Ethanol Drinking Facilitates the Transition to Excessive Drinking After Chronic Intermittent Ethanol Vapor Exposure. Alcohol Clin Exp Res 2017; 41:1502-1509. [PMID: 28679148 DOI: 10.1111/acer.13434] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 06/06/2017] [Indexed: 01/03/2023]
Abstract
BACKGROUND Alcohol binge drinking in humans is thought to increase the risk for alcohol use disorder (AUD). Unclear is whether drinking patterns (e.g., bingelike or stable drinking) differentially affect the transition to compulsive-like drinking in dependent individuals. We examined whether chronic bingelike drinking facilitates the transition to compulsive-like drinking in rats. METHODS Male Wistar rats were given 5 months of intermittent access to ethanol (EtOH) (IAE) or continuous access to EtOH (CAE) in a 2-bottle choice paradigm. Then, rats were given chronic intermittent EtOH (CIE) vapor exposure. Escalation of EtOH intake and compulsive-like responding for EtOH, using a progressive-ratio schedule of reinforcement and quinine-adulterated EtOH, were measured. RESULTS IAE rats escalated EtOH drinking after 2 weeks of 2-bottle choice, whereas CAE rats exhibited stable EtOH drinking for 5 months. After 8 weeks of CIE, both IAE + CIE and CAE + CIE rats escalated their EtOH intake. However, IAE rats escalated their EtOH intake weeks sooner than CAE rats and exhibited greater EtOH intake. No differences in compulsive-like responding were found between IAE + CIE and CAE + CIE rats. However, both IAE + CIE and CAE + CIE rats showed strong compulsive-like responding compared with rats without prior IAE or CAE. CONCLUSIONS Chronic EtOH drinking at stable or escalated levels for several months is associated with more compulsive-like responding for EtOH in rats that are exposed to CIE compared with rats without a prior history of EtOH drinking. Moreover, IAE facilitated the transition to compulsive-like responding for EtOH after CIE exposure, reflected by the escalation of EtOH intake. These results suggest that IAE may facilitate the transition to AUD. This study indicates that despite a moderate level of EtOH drinking, the IAE animal model is highly relevant to early stages of alcohol abuse and suggests that it may be associated with neuroadaptations that produce a faster transition to alcohol dependence.
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Affiliation(s)
- Adam Kimbrough
- Department of Neuroscience, The Scripps Research Institute, La Jolla, California
| | - Sarah Kim
- Department of Neuroscience, The Scripps Research Institute, La Jolla, California
| | - Maury Cole
- Department of Neuroscience, The Scripps Research Institute, La Jolla, California
| | - Molly Brennan
- Department of Neuroscience, The Scripps Research Institute, La Jolla, California
| | - Olivier George
- Department of Neuroscience, The Scripps Research Institute, La Jolla, California
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