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Tyler RE, Van Voorhies K, Blough BE, Landavazo A, Besheer J. mGlu 2 and mGlu 3 receptor negative allosteric modulators attenuate the interoceptive effects of alcohol in male and female rats. Pharmacol Biochem Behav 2024; 239:173767. [PMID: 38608960 PMCID: PMC11090252 DOI: 10.1016/j.pbb.2024.173767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/27/2024] [Accepted: 04/09/2024] [Indexed: 04/14/2024]
Abstract
RATIONALE The subjective effects of alcohol are associated with alcohol use disorder (AUD) vulnerability and treatment outcomes. The interoceptive effects of alcohol are part of these subjective effects and can be measured in animal models using drug discrimination procedures. The newly developed mGlu2 and mGlu3 negative allosteric modulators (NAMs) are potential therapeutics for AUD and may alter interoceptive sensitivity to alcohol. OBJECTIVES To determine the effects of mGlu2 and mGlu3 NAMs on the interoceptive effects of alcohol in rats. METHODS Long-Evans rats were trained to discriminate the interoceptive stimulus effects of alcohol (2.0 g/kg, i.g.) from water using both operant (males only) and Pavlovian (male and female) drug discrimination techniques. Following acquisition training, an alcohol dose-response (0, 0.5, 1.0, 2.0 g/kg) experiment was conducted to confirm stimulus control over behavior. Next, to test the involvement of mGlu2 and mGlu3, rats were pretreated with the mGlu2-NAM (VU6001966; 0, 3, 6, 12 mg/kg, i.p.) or the mGlu3-NAM (VU6010572; 0, 3, 6, 12 mg/kg, i.p.) before alcohol administration (2.0 g/kg, i.g.). RESULTS In Pavlovian discrimination, male rats showed greater interoceptive sensitivity to 1.0 and 2.0 g/kg alcohol compared to female rats. Both mGlu2-NAM and mGlu3-NAM attenuated the interoceptive effects of alcohol in male and female rats using Pavlovian and operant discrimination. There may be a potential sex difference in response to the mGlu2-NAM at the highest dose tested. CONCLUSIONS Male rats may be more sensitive to the interoceptive effects of the 2.0 g/kg alcohol training dose compared to female rats. Both mGlu2-and mGlu3-NAM attenuate the interoceptive effects of alcohol in male and female rats. These drugs may have potential for treatment of AUD in part by blunting the subjective effects of alcohol.
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Affiliation(s)
- Ryan E Tyler
- Neuroscience Curriculum, School of Medicine, University of North Carolina - Chapel Hill, Chapel Hill, NC, United States of America; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina, Chapel Hill, NC, United States of America
| | - Kalynn Van Voorhies
- Neuroscience Curriculum, School of Medicine, University of North Carolina - Chapel Hill, Chapel Hill, NC, United States of America; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina, Chapel Hill, NC, United States of America
| | - Bruce E Blough
- Center for Drug Discovery, RTI International, Research Triangle Park, NC, United States of America
| | - Antonio Landavazo
- Center for Drug Discovery, RTI International, Research Triangle Park, NC, United States of America
| | - Joyce Besheer
- Neuroscience Curriculum, School of Medicine, University of North Carolina - Chapel Hill, Chapel Hill, NC, United States of America; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina, Chapel Hill, NC, United States of America; Department of Psychiatry, School of Medicine, University of North Carolina, Chapel Hill, NC, United States of America.
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de Bejczy A, Addolorato G, Aubin HJ, Guiraud J, Korpi ER, John Nutt D, Witkiewitz K, Söderpalm B. AUD in perspective. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2024; 175:1-19. [PMID: 38555113 DOI: 10.1016/bs.irn.2024.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
Abstract
Alcohol is a major cause of pre-mature death and individual suffering worldwide, and the importance of diagnosing and treating AUD cannot be overstated. Given the global burden and the high attributable factor of alcohol in a vast number of diseases, the need for additional interventions and the development of new medicines is considered a priority by the World Health Organization (WHO). As of today, AUD is severely under-treated with a treatment gap nearing 90%, strikingly higher than that for other psychiatric disorders. Patients often seek treatment late in the progress of the disease and even among those who seek treatment only a minority receive medication, mirroring the still-prevailing stigma of the disease, and a lack of access to effective treatments, as well as a reluctance to total abstinence. To increase adherence, treatment goals should focus not only on maintaining abstinence, but also on harm reduction and psychosocial functioning. A personalised approach to AUD treatment, with a holistic view, and tailored therapy has the potential to improve AUD treatment outcomes by targeting the heterogeneity in genetics and pathophysiology, as well as reason for, and reaction to drinking. Also, the psychiatric co-morbidity rates are high in AUD and dual diagnosis can worsen symptoms and influence treatment response and should be considered in the treatment strategies.
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Affiliation(s)
- Andrea de Bejczy
- Addiction Biology Unit, Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Department of Addiction and Dependency, Sahlgrenska University Hospital, Gothenburg, Sweden.
| | - Giovanni Addolorato
- Department of Medical and Surgical Sciences, Università Cattolica di Roma, Rome, Italy; Internal Medicine and Alcohol Related Disease Unit, Columbus-Gemelli Hospital, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Henri-Jean Aubin
- Université Paris-Saclay, Inserm, CESP, Villejuif, France; AP-HP, Université Paris Saclay, Villejuif, France
| | - Julien Guiraud
- Amsterdam UMC, Location Academic Medical Center, University of Amsterdam, Department of Psychiatry, Amsterdam Neuroscience, Amsterdam, The Netherlands; Vergio, Clichy, France
| | - Esa R Korpi
- Department of Pharmacology, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - David John Nutt
- Imperial College London and GABA Labs, London, United Kingdom
| | - Katie Witkiewitz
- Department of Psychology and Center on Alcohol, Substance Use, and Addictions, University of New Mexico, Albuquerque, New Mexico, United States
| | - Bo Söderpalm
- Addiction Biology Unit, Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Department of Addiction and Dependency, Sahlgrenska University Hospital, Gothenburg, Sweden
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Kalinichenko LS, Kohl Z, Mühle C, Hassan Z, Hahn A, Schmitt EM, Macht K, Stoyanov L, Moghaddami S, Bilbao R, Eulenburg V, Winkler J, Kornhuber J, Müller CP. Sex-specific pleiotropic changes in emotional behavior and alcohol consumption in human α-synuclein A53T transgenic mice during early adulthood. J Neurochem 2024; 168:269-287. [PMID: 38284431 DOI: 10.1111/jnc.16051] [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: 07/18/2023] [Revised: 12/15/2023] [Accepted: 01/07/2024] [Indexed: 01/30/2024]
Abstract
Point mutations in the α-synuclein coding gene may lead to the development of Parkinson's disease (PD). PD is often accompanied by other psychiatric conditions, such as anxiety, depression, and drug use disorders, which typically emerge in adulthood. Some of these point mutations, such as SNCA and A30T, have been linked to behavioral effects that are not commonly associated with PD, especially regarding alcohol consumption patterns. In this study, we investigated whether the familial PD point mutation A53T is associated with changes in alcohol consumption behavior and emotional states at ages not yet characterized by α-synuclein accumulation. The affective and alcohol-drinking phenotypes remained unaltered in female PDGF-hA53T-synuclein-transgenic (A53T) mice during both early and late adulthood. Brain region-specific activation of ceramide-producing enzymes, acid sphingomyelinase (ASM), and neutral sphingomyelinase (NSM), known for their neuroprotective properties, was observed during early adulthood but not in late adulthood. In males, the A53T mutation was linked to a reduction in alcohol consumption in both early and late adulthood. However, male A53T mice displayed increased anxiety- and depression-like behaviors during both early and late adulthood. Enhanced ASM activity in the dorsal mesencephalon and ventral hippocampus may potentially contribute to these adverse behavioral effects of the mutation in males during late adulthood. In summary, the A53T gene mutation was associated with diverse changes in emotional states and alcohol consumption behavior long before the onset of PD, and these effects varied by sex. These alterations in behavior may be linked to changes in brain ceramide metabolism.
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Affiliation(s)
- Liubov S Kalinichenko
- Department of Psychiatry and Psychotherapy, University Clinic, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
| | - Zacharias Kohl
- Division of Molecular Neurology, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
- Center for Rare Diseases Erlangen (ZSEER), University Hospital Erlangen, Erlangen, Germany
- Department of Neurology, University of Regensburg, Regensburg, Germany
| | - Christiane Mühle
- Department of Psychiatry and Psychotherapy, University Clinic, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
| | - Zurina Hassan
- Centre for Drug Research, Universiti Sains Malaysia, Penang, Malaysia
| | - Agnes Hahn
- Department of Psychiatry and Psychotherapy, University Clinic, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
| | - Eva-Maria Schmitt
- Department of Psychiatry and Psychotherapy, University Clinic, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
| | - Kilian Macht
- Department of Psychiatry and Psychotherapy, University Clinic, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
| | - Lyubomir Stoyanov
- Department of Psychiatry and Psychotherapy, University Clinic, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
| | - Schayan Moghaddami
- Department of Psychiatry and Psychotherapy, University Clinic, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
| | - Roberto Bilbao
- Department of Psychiatry and Psychotherapy, University Clinic, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
| | - Volker Eulenburg
- Department for Anesthesiology and Intensive Care, Faculty of Medicine, University of Leipzig, Leipzig, Germany
| | - Jürgen Winkler
- Division of Molecular Neurology, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
- Center for Rare Diseases Erlangen (ZSEER), University Hospital Erlangen, Erlangen, Germany
| | - Johannes Kornhuber
- Department of Psychiatry and Psychotherapy, University Clinic, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
| | - Christian P Müller
- Department of Psychiatry and Psychotherapy, University Clinic, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
- Centre for Drug Research, Universiti Sains Malaysia, Penang, Malaysia
- Institute of Psychopharmacology, Central Institute of Mental Health, Faculty of Medicine Mannheim, University of Heidelberg, Heidelberg, Germany
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Pagano R, Salamian A, Skonieczna E, Wojtas B, Gielniewski B, Harda Z, Cały A, Havekes R, Abel T, Radwanska K. Molecular fingerprints in the hippocampus of alcohol seeking during withdrawal. RESEARCH SQUARE 2023:rs.3.rs-3337670. [PMID: 37841864 PMCID: PMC10571638 DOI: 10.21203/rs.3.rs-3337670/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
Alcohol use disorder (AUD) is characterized by pathological motivation to consume alcohol and cognitive inflexibility, leading to excessive alcohol seeking and use. Due to limited understanding of the molecular basis of the disease, there are few pharmacological interventions available to combat AUD. In this study, we aimed to investigate the molecular correlates of impaired extinction of alcohol seeking during alcohol withdrawal using a mouse model of AUD implemented in the automated IntelliCage social system. This model enabled us to distinguish between animals exhibiting AUD-prone and AUD-resistant phenotypes, based on the presence of ≥ 2 or < 2 criteria of AUD, respectively. We utilized new generation RNA sequencing to identify genes that were differentially expressed in the hippocampus and amygdala of mice meeting ≥ 2 or < 2 criteria, as these brain regions are implicated in alcohol motivation, seeking, consumption and the cognitive inflexibility characteristic of AUD. To complement the sequencing studies, we conducted ex vivo electrophysiology experiments. Our findings revealed significant dysregulation of the hippocampal genes associated with the actin cytoskeleton and synaptic function, including actin binding molecule cofilin, during alcohol withdrawal in mice meeting ≥ 2 criteria compared to those meeting < 2 criteria. Moreover, this dysregulation was accompanied by impaired synaptic transmission in the molecular layer of the hippocampal dentate gyrus (ML-DG). Additionally, we demonstrated that overexpression of cofilin in the polymorphic layer of the hippocampal dentate gyrus (PoDG) inhibited ML-DG synapses, increased motivation to seek alcohol, impaired extinction of alcohol seeking and increased correlation between AUD behaviors, resembling the phenotype observed in mice meeting ≥ 2 criteria. Overall, our study uncovers a novel mechanism linking increased hippocampal cofilin expression with the AUD phenotype.
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Affiliation(s)
- Roberto Pagano
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
| | - Ahmad Salamian
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
| | - Edyta Skonieczna
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
| | - Bartosz Wojtas
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
| | - Bartek Gielniewski
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
| | - Zofia Harda
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
- current address: Department Molecular Neuropharmacology, Maj Institute of Pharmacology of Polish Academy of Sciences, Krakow, Poland
| | - Anna Cały
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
| | - Robbert Havekes
- Neurobiology expertise group, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands
| | - Ted Abel
- Iowa Neuroscience Institute, Carver College of Medicine, University of Iowa, Iowa City, IA, USA; Department of Neuroscience and Pharmacology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Kasia Radwanska
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
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Pagano R, Salamian A, Skonieczna E, Wojtas B, Gielniewski B, Harda Z, Cały A, Havekes R, Abel T, Radwanska K. Molecular fingerprints in the hippocampus of alcohol seeking during withdrawal. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.24.554622. [PMID: 37662388 PMCID: PMC10473700 DOI: 10.1101/2023.08.24.554622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Alcohol use disorder (AUD) is characterized by excessive alcohol seeking and use. Here, we investigated the molecular correlates of impaired extinction of alcohol seeking using a multidimentional mouse model of AUD. We distinguished AUD-prone and AUD-resistant mice, based on the presence of ≥ 2 or < 2 criteria of AUD and utilized RNA sequencing to identify genes that were differentially expressed in the hippocampus and amygdala of mice meeting ≥ 2 or < 2 criteria, as these brain regions are implicated in alcohol motivation, seeking, consumption and the cognitive inflexibility characteristic of AUD. Our findings revealed dysregulation of the genes associated with the actin cytoskeleton, including actin binding molecule cofilin, and impaired synaptic transmission in the hippocampi of mice meeting ≥ 2 criteria. Overexpression of cofilin in the polymorphic layer of the dentate gyrus (PoDG) inhibited ML-DG synapses, increased motivation to seek alcohol and impaired extinction of alcohol seeking, resembling the phenotype observed in mice meeting ≥ 2 criteria. Overall, our study uncovers a novel mechanism linking increased hippocampal cofilin expression with the AUD phenotype.
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Affiliation(s)
- Roberto Pagano
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
| | - Ahmad Salamian
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
| | - Edyta Skonieczna
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
| | - Bartosz Wojtas
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
| | - Bartek Gielniewski
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
| | - Zofia Harda
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
- current address: Department Molecular Neuropharmacology, Maj Institute of Pharmacology of Polish Academy of Sciences, Krakow, Poland
| | - Anna Cały
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
| | - Robbert Havekes
- Neurobiology expertise group, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands
| | - Ted Abel
- Iowa Neuroscience Institute, Carver College of Medicine, University of Iowa, Iowa City, IA, USA; Department of Neuroscience and Pharmacology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Kasia Radwanska
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 3 Pasteur St., Warsaw 02-093, Poland
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Dogra S, Putnam J, Conn PJ. Metabotropic glutamate receptor 3 as a potential therapeutic target for psychiatric and neurological disorders. Pharmacol Biochem Behav 2022; 221:173493. [PMID: 36402243 PMCID: PMC9729465 DOI: 10.1016/j.pbb.2022.173493] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 11/08/2022] [Accepted: 11/12/2022] [Indexed: 11/18/2022]
Abstract
Glutamate is a major excitatory neurotransmitter in the central nervous system (CNS) and abnormalities in the glutamatergic system underlie various CNS disorders. As metabotropic glutamate receptor 3 (mGlu3 receptor) regulates glutamatergic transmission in various brain areas, emerging literature suggests that targeting mGlu3 receptors can be a novel approach to the treatment of psychiatric and neurological disorders. For example, mGlu3 receptor negative allosteric modulators (NAMs) induce rapid antidepressant-like effects in both acute and chronic stress models. Activation of mGlu3 receptors can enhance cognition in the rodents modeling schizophrenia-like pathophysiology. The mGlu3 receptors expressed in the astrocytes induce neuroprotective effects. Although polymorphisms in GRM3 have been shown to be associated with addiction, there is not significant evidence about the efficacy of mGlu3 receptor ligands in rodent models of addiction. Collectively, drugs targeting mGlu3 receptors may provide an alternative approach to fill the unmet clinical need for safer and more efficacious therapeutics for CNS disorders.
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Affiliation(s)
- Shalini Dogra
- Department of Pharmacology, Vanderbilt University, Nashville, TN 37232, USA; Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, TN 37232, USA
| | - Jason Putnam
- Department of Pharmacology, Vanderbilt University, Nashville, TN 37232, USA; Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, TN 37232, USA
| | - P Jeffrey Conn
- Department of Pharmacology, Vanderbilt University, Nashville, TN 37232, USA; Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, TN 37232, USA.
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Sex-Related Differences in Voluntary Alcohol Intake and mRNA Coding for Synucleins in the Brain of Adult Rats Prenatally Exposed to Alcohol. Biomedicines 2022; 10:biomedicines10092163. [PMID: 36140264 PMCID: PMC9496239 DOI: 10.3390/biomedicines10092163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 08/17/2022] [Accepted: 08/29/2022] [Indexed: 11/24/2022] Open
Abstract
Maternal alcohol consumption is one of the strong predictive factors of alcohol use and consequent abuse; however, investigations of sex differences in response to prenatal alcohol exposure (PAE) are limited. Here we compared the effects of PAE throughout gestation on alcohol preference, state anxiety and mRNA expression of presynaptic proteins α-, β- and γ-synucleins in the brain of adult (PND60) male and female Wistar rats. Total RNA was isolated from the hippocampus, midbrain and hypothalamus and mRNA levels were assessed with quantitative RT-PCR. Compared with naïve males, naïve female rats consumed more alcohol in “free choice” paradigm (10% ethanol vs. water). At the same time, PAE produced significant increase in alcohol consumption and preference in males but not in females compared to male and female naïve groups, correspondingly. We found significantly lower α-synuclein mRNA levels in the hippocampus and midbrain of females compared to males and significant decrease in α-synuclein mRNA in these brain areas in PAE males, but not in females compared to the same sex controls. These findings indicate that the impact of PAE on transcriptional regulation of synucleins may be sex-dependent, and in males’ disruption in α-synuclein mRNA expression may contribute to increased vulnerability to alcohol-associated behavior.
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Tyler RE, Bluitt MN, Engers JL, Lindsley CW, Besheer J. The effects of predator odor (TMT) exposure and mGlu 3 NAM pretreatment on behavioral and NMDA receptor adaptations in the brain. Neuropharmacology 2022; 207:108943. [PMID: 35007623 PMCID: PMC8844221 DOI: 10.1016/j.neuropharm.2022.108943] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 12/09/2021] [Accepted: 01/04/2022] [Indexed: 12/13/2022]
Abstract
A stressor can trigger lasting adaptations that contribute to neuropsychiatric disorders. Predator odor (TMT) exposure is an innate stressor that may activate the metabotropic glutamate receptor 3 (mGlu3) to produce stress adaptations. To evaluate functional involvement, the mGlu3 negative allosteric modulator (NAM, VU6010572; 3 mg/kg, i.p.) was administered before TMT exposure in male, Long Evans rats. Two weeks after, rats underwent context re-exposure, elevated zero maze (ZM), and acoustic startle (ASR) behavioral tests, followed by RT-PCR gene expression in the insular cortex and bed nucleus of the stria terminalis (BNST) to evaluate lasting behavioral and molecular adaptations from the stressor. Rats displayed stress-reactive behaviors in response to TMT exposure that were not affected by VU6010572. Freezing and hyperactivity were observed during the context re-exposure, and mGlu3-NAM pretreatment during stressor prevented the context freezing response. TMT exposure did not affect ZM or ASR measures, but VU6010572 increased time spent in the open arms of the ZM and ASR habituation regardless of stressor treatment. In the insular cortex, TMT exposure increased expression of mGlu (Grm3, Grm5) and NMDA (GriN2A, GriN2B, GriN2C, GriN3A, GriN3B) receptor transcripts, and mGlu3-NAM pretreatment blocked GriN3B upregulation. In the BNST, TMT exposure increased expression of GriN2B and GriN3B in vehicle-treated rats, but decreased expression in the mGlu3-NAM group. Similar to the insular cortex, mGlu3-NAM reversed the stressor-induced upregulation of GriN3B in the BNST. mGlu3-NAM also upregulated GriN2A, GriN2B, GriN3B and Grm2 in the control group, but not the TMT group. Together, these data implicate mGlu3 receptor signaling in some lasting adaptations of predator odor stressor and anxiolytic-like effects.
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Affiliation(s)
- Ryan E Tyler
- Neuroscience Curriculum, School of Medicine, University of North Carolina - Chapel Hill, Chapel Hill, NC, USA; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Maya N Bluitt
- Neuroscience Curriculum, School of Medicine, University of North Carolina - Chapel Hill, Chapel Hill, NC, USA; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Julie L Engers
- Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, TN, USA
| | - Craig W Lindsley
- Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, TN, USA
| | - Joyce Besheer
- Neuroscience Curriculum, School of Medicine, University of North Carolina - Chapel Hill, Chapel Hill, NC, USA; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina, Chapel Hill, NC, USA; Department of Psychiatry, School of Medicine, University of North Carolina, Chapel Hill, NC, USA.
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LaVallie C, Sasakamoose J. Promoting indigenous cultural responsivity in addiction treatment work: the call for neurodecolonization policy and practice. J Ethn Subst Abuse 2021:1-23. [PMID: 34348080 DOI: 10.1080/15332640.2021.1956392] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Addiction is a multidimensional issue affecting North American, Indigenous peoples. Most federal and provincial-funded treatment programs follow a Western model. We argue for more comprehensive culturally responsive training for workers, and the concept of neurodecolonization be covered. We also call for developing policy within education, licensing bodies, and front-line organizations for a working knowledge of the historical and racial contexts affecting Indigenous peoples. These policies must engage with the Kehte-ayak (Old Ones), while harmonizing Indigenous and Western knowledge systems that incorporate contemplative practices such as Indigenous ceremonies and neurodecolonzation approaches to healing.
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Affiliation(s)
- Carrie LaVallie
- First Nations University of Canada, Prince Albert, Saskatchewan, Canada
| | - JoLee Sasakamoose
- University of Regina, Regina, Saskatchewan, Canada.,Indigenous Wellness Research Community Network & Wellness Wheel Medical Clinic, Regina, Saskatchewan, Canada
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Stoychev K, Dilkov D, Naghavi E, Kamburova Z. Genetic Basis of Dual Diagnosis: A Review of Genome-Wide Association Studies (GWAS) Focusing on Patients with Mood or Anxiety Disorders and Co-Occurring Alcohol-Use Disorders. Diagnostics (Basel) 2021; 11:diagnostics11061055. [PMID: 34201295 PMCID: PMC8228390 DOI: 10.3390/diagnostics11061055] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/03/2021] [Accepted: 06/03/2021] [Indexed: 01/02/2023] Open
Abstract
(1) Background: Comorbidity between Alcohol Use Disorders (AUD), mood, and anxiety disorders represents a significant health burden, yet its neurobiological underpinnings are elusive. The current paper reviews all genome-wide association studies conducted in the past ten years, sampling patients with AUD and co-occurring mood or anxiety disorder(s). (2) Methods: In keeping with PRISMA guidelines, we searched EMBASE, Medline/PUBMED, and PsycINFO databases (January 2010 to December 2020), including references of enrolled studies. Study selection was based on predefined criteria and data underwent a multistep revision process. (3) Results: 15 studies were included. Some of them explored dual diagnoses phenotypes directly while others employed correlational analysis based on polygenic risk score approach. Their results support the significant overlap of genetic factors involved in AUDs and mood and anxiety disorders. Comorbidity risk seems to be conveyed by genes engaged in neuronal development, connectivity, and signaling although the precise neuronal pathways and mechanisms remain unclear. (4) Conclusion: given that genes associated with complex traits including comorbid clinical presentations are of small effect, and individually responsible for a very low proportion of the total variance, larger samples consisting of multiple refined comorbid combinations and confirmed by re-sequencing approaches will be necessary to disentangle the genetic architecture of dual diagnosis.
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Affiliation(s)
- Kaloyan Stoychev
- Department of Psychiatry, Medical University Pleven, 5800 Pleven, Bulgaria
- Correspondence: ; Tel.: +359-64-886-867
| | - Dancho Dilkov
- Department of Psychiatry, Military Medical Academy Sofia, 1606 Sofia, Bulgaria;
| | | | - Zornitsa Kamburova
- Department of Medical Genetics, Medical University Pleven, 5800 Pleven, Bulgaria;
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Aubin HJ, Dureau-Pournin C, Falissard B, Paille F, Rigaud A, Micon S, Pénichon M, Andersohn F, Truchi C, Blin P. Use of Nalmefene in Routine Practice: Results from a French Prospective Cohort Study and a National Database Analysis. Alcohol Alcohol 2021; 56:545-555. [PMID: 33969378 PMCID: PMC8406069 DOI: 10.1093/alcalc/agab029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/22/2021] [Accepted: 03/20/2021] [Indexed: 11/13/2022] Open
Abstract
Aims Two complementary studies were used to assess the real-life use of nalmefene in alcohol-dependent patients and its impact on alcohol use health status. Methods USE-PACT was a prospective cohort study designed to evaluate the real-life effectiveness of nalmefene in the management of alcohol dependence, as assessed by total alcohol consumption (TAC) and number of heavy drinking days (HDD) at 1 year. USE-AM was a cohort study using data from the French nationwide claims database and was used to evaluate the external validity of the population in the prospective study. Results Overall, 256 of 700 new nalmefene users enrolled in the USE-PACT study had valid data at 1 year. After 1 year, patients treated with nalmefene showed a mean ± SD reduction from baseline in TAC (−41.5 ± 57.4 g/day) and number of HDD (−10.7 ± 11.7 days/4 weeks). Patients took a mean ± SD of 20.0 ± 12.0 tablets/4 weeks (median of 1 tablet/day) for the first 3 months and then reduced the dose. The proportion of patients who no longer took nalmefene gradually increased from 5% at 1 month to 52% at 1 year. The USE-AM study identified 486 patients with a first reimbursement for nalmefene in 2016; baseline characteristics confirmed external validity of the USE-PACT study. Overall, 46.3% of initial USE-AM prescriptions were made by GPs; most (91.8%) patients stopped treatment during follow-up. However, 15.2% of patients resumed treatment after stopping. Conclusions In this analysis of French routine practice, patients with alcohol dependence treated with nalmefene showed reduced alcohol consumption, and nalmefene was generally well tolerated.
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Affiliation(s)
- Henri-Jean Aubin
- Université Paris-Saclay, Inserm, CESP, AP-HP. Université Paris Saclay, 12, avenue Paul-Vaillant-Couturier, 94804 Villejuif, France
| | - Caroline Dureau-Pournin
- Université de Bordeaux, INSERM CIC-P 1401, Bordeaux PharmacoEpi, Rue Eugène Jacquet, Bordeaux 33000, France
| | - Bruno Falissard
- CESP/INSERM U1018, Centre de Recherche en Epidémiologie et Santé des Populations, Hôpital Paul Brousse Bat 15/16, 16 av PV Couturier - 94807 Villejuif, France
| | - François Paille
- Université de Lorraine, 34 Cours Léopold, 54000 Nancy, France
| | - Alain Rigaud
- Ancien chef du pôle d'Addictologie de l'EPSM Marne, Psychiatre des hôpitaux honoraire, 28 bis, rue de Courcelles 51100 Reims, France
| | - Sophie Micon
- Université de Bordeaux, INSERM CIC-P 1401, Bordeaux PharmacoEpi, Rue Eugène Jacquet, Bordeaux 33000, France
| | - Marine Pénichon
- Université de Bordeaux, INSERM CIC-P 1401, Bordeaux PharmacoEpi, Rue Eugène Jacquet, Bordeaux 33000, France
| | - Frank Andersohn
- Frank Andersohn Consulting and Research Services, Mandelstrasse 16, 10409 Berlin, Germany
| | - Christine Truchi
- Lundbeck SAS, 102 Terrasse Boieldieu 92085 Paris La Défense, France
| | - Patrick Blin
- Université de Bordeaux, INSERM CIC-P 1401, Bordeaux PharmacoEpi, Rue Eugène Jacquet, Bordeaux 33000, France
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12
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Kamboj SK, Zhao H, Troebinger L, Piazza G, Cawley E, Hennessy V, Iskandar G, Das RK. Rewarding Subjective Effects of the NMDAR Antagonist Nitrous Oxide (Laughing Gas) Are Moderated by Impulsivity and Depressive Symptoms in Healthy Volunteers. Int J Neuropsychopharmacol 2021; 24:551-561. [PMID: 33667308 PMCID: PMC8299821 DOI: 10.1093/ijnp/pyab009] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 02/02/2021] [Accepted: 02/23/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Nitrous oxide (N2O) is an anesthetic gas with both therapeutic and abuse potential. Because N2O is an NMDA receptor (NMDAR) antagonist, its effects are expected to resemble those of the prototypical NMDAR antagonist, ketamine. In this study, we examined the subjective rewarding effects of N2O using measures previously employed in studies of ketamine. We also tested for moderation of these effects by bipolar phenotype, depressive symptoms, and impulsivity. METHODS Healthy volunteers were randomly assigned to either 50% N2O (n = 40) or medical air (n = 40). Self-reported rewarding (liking and wanting), and alcohol-like effects were assessed pre-, peri- and post inhalation. RESULTS Effect sizes for the various rewarding/alcohol-like effects of N2O were generally similar to those reported in studies of moderate-dose ketamine. Impulsivity moderated the subjective reinforcing (liking) effects of inhaled gas, while depressive symptoms moderated motivational (wanting [more]) effects. However, depression and impulsivity had opposite directional influences, such that higher impulsivity was associated with higher N2O liking, and higher depression, with lower N2O wanting. CONCLUSION To the extent that static (versus longitudinal) subjective rewarding effects are a reliable indicator of future problematic drug use, our findings suggests that impulsivity and depression may predispose and protect, respectively, against N2O abuse. Future studies should examine if these moderators are relevant for other NMDAR antagonists, including ketamine, and novel ketamine-like therapeutic and recreational drugs. Similarities between moderate-dose N2O and moderate-dose ketamine in the intensity of certain subjective effects suggest that N2O may, at least to some extent, serve as substitute for ketamine as a safe and easily implemented experimental tool for probing reward-related NMDAR function and dysfunction in humans.
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Affiliation(s)
- Sunjeev K Kamboj
- Clinical Psychopharmacology Unit, Research Department Clinical Educational and Health Psychology, University College London, London, United Kingdom,Correspondence: Sunjeev K. Kamboj, DClinPsy, PhD, ()
| | - Hannah Zhao
- Clinical Psychopharmacology Unit, Research Department Clinical Educational and Health Psychology, University College London, London, United Kingdom
| | - Luzia Troebinger
- Clinical Psychopharmacology Unit, Research Department Clinical Educational and Health Psychology, University College London, London, United Kingdom
| | - Giulia Piazza
- Clinical Psychopharmacology Unit, Research Department Clinical Educational and Health Psychology, University College London, London, United Kingdom
| | - Emma Cawley
- Clinical Psychopharmacology Unit, Research Department Clinical Educational and Health Psychology, University College London, London, United Kingdom
| | - Vanessa Hennessy
- Clinical Psychopharmacology Unit, Research Department Clinical Educational and Health Psychology, University College London, London, United Kingdom
| | - Georges Iskandar
- Department of Anaesthesia and Perioperative Medicine, University College London Hospital, London, United Kingdom
| | - Ravi K Das
- Clinical Psychopharmacology Unit, Research Department Clinical Educational and Health Psychology, University College London, London, United Kingdom
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13
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Cahill CM, Aleyadeh R, Gao J, Wang C, Rogers JT. Alpha-Synuclein in Alcohol Use Disorder, Connections with Parkinson's Disease and Potential Therapeutic Role of 5' Untranslated Region-Directed Small Molecules. Biomolecules 2020; 10:E1465. [PMID: 33096655 PMCID: PMC7589448 DOI: 10.3390/biom10101465] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/28/2020] [Accepted: 10/09/2020] [Indexed: 12/23/2022] Open
Abstract
Alpha-synuclein (α-Syn) is a 140-amino acid (aa) protein encoded by the Synuclein alpha SNCA gene. It is the synaptic protein associated with Parkinson's disease (PD) and is the most highly expressed protein in the Lewy bodies associated with PD and other alpha synucleopathies, including Lewy body dementia (LBD) and multiple system atrophy (MSA). Iron deposits are present in the core of Lewy bodies, and there are reports suggesting that divalent metal ions including Cu2+ and Fe2+ enhance the aggregation of α-Syn. Differential expression of α-Syn is associated with alcohol use disorder (AUD), and specific genetic variants contribute to the risk for alcoholism, including alcohol craving. Spliced variants of α-Syn, leading to the expression of several shorter forms which are more prone to aggregation, are associated with both PD and AUD, and common transcript variants may be able to predict at-risk populations for some movement disorders or subtypes of PD, including secondary Parkinsonism. Both PD and AUD are associated with liver and brain iron dyshomeostasis. Research over the past decade has shown that α-Syn has iron import functions with an ability to oxidize the Fe3+ form of iron to Fe2+ to facilitate its entry into cells. Our prior research has identified an iron-responsive element (IRE) in the 5' untranslated region (5'UTR) of α-Syn mRNA, and we have used the α-Syn 5'UTR to screen for small molecules that modulate its expression in the H4 neuronal cell line. These screens have led us to identify several interesting small molecules capable of both decreasing and increasing α-Syn expression and that may have the potential, together with the recently described mesenchymal stem cell therapies, to normalize α-Syn expression in different regions of the alcoholic and PD brain.
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Affiliation(s)
- Catherine M. Cahill
- Neurochemistry Laboratory, Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA;
| | | | - Jin Gao
- Department of Clinical Psychology, Qilu Hospital of Shandong University, Qingdao 266011, China;
| | - Changning Wang
- Athinoula A. Martinos Center for Biomedical Imaging Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA;
| | - Jack T. Rogers
- Neurochemistry Laboratory, Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA;
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Johnson KA, Lovinger DM. Allosteric modulation of metabotropic glutamate receptors in alcohol use disorder: Insights from preclinical investigations. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2020; 88:193-232. [PMID: 32416868 DOI: 10.1016/bs.apha.2020.02.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Metabotropic glutamate (mGlu) receptors are family C G protein-coupled receptors (GPCRs) that modulate neuronal excitability and synaptic transmission throughout the nervous system. Owing to recent advances in development of subtype-selective allosteric modulators of mGlu receptors, individual members of the mGlu receptor family have been proposed as targets for treating a variety of neurological and psychiatric disorders, including substance use disorders. In this chapter, we highlight preclinical evidence that allosteric modulators of mGlu receptors could be useful for reducing alcohol consumption and preventing relapse in alcohol use disorder (AUD). We begin with an overview of the preclinical models that are used to study mGlu receptor involvement in alcohol-related behaviors. Alcohol exposure causes adaptations in both expression and function of various mGlu receptor subtypes, and pharmacotherapies aimed at reversing these adaptations have the potential to reduce alcohol consumption and seeking. Positive allosteric modulators (PAMs) of mGlu2 and negative allosteric modulators of mGlu5 show particular promise for reducing alcohol intake and/or preventing relapse. Finally, this chapter discusses important considerations for translating preclinical findings toward the development of clinically useful drugs, including the potential for PAMs to avoid tolerance issues that are frequently observed with repeated administration of GPCR agonists.
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Affiliation(s)
- Kari A Johnson
- Department of Pharmacology, Uniformed Services University of the Health Sciences, Bethesda, MD, United States.
| | - David M Lovinger
- Laboratory for Integrative Neuroscience, National Institute on Alcohol Abuse and Alcoholism, US National Institutes of Health, Rockville, MD, United States
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Addiction by Any Other Name is Still Addiction: Embracing Molecular Neurogenetic/Epigenetic Basis of Reward Deficiency. JOURNAL OF ADDICTION SCIENCE 2020; 6:1-4. [PMID: 32432229 PMCID: PMC7236379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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16
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Schepers ST, Arndt DL, Rogers RD, Hedeker D, de Wit H. Subjective responses to amphetamine in young adults with previous mood elevation experiences. Psychopharmacology (Berl) 2019; 236:3363-3370. [PMID: 31209507 PMCID: PMC7053220 DOI: 10.1007/s00213-019-05295-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 06/02/2019] [Indexed: 12/17/2022]
Abstract
RATIONALE One risk factor for alcohol and substance misuse is hypomanic experiences, or periods of mood elevation. Young people who report hypomanic states are more likely to develop bipolar disorder (BP), and BP and other mood disorders increase the risk of addiction. We recently reported that young adults with a history of mood elevation experience less subjective effects from a low dose of alcohol, which may be predictive of future alcohol use. The finding with alcohol raised the question of whether this dampened response to a drug also applies to other drugs, such as amphetamine. OBJECTIVE This study assessed responses of d-amphetamine in healthy young adults with varying experiences of mood elevation, as measured by the Mood Disorders Questionnaire (MDQ). METHODS Healthy 18-19-year-olds (N = 30) with a range of MDQ scores participated in three 4-h laboratory sessions in which they received placebo, 10 mg, or 20 mg d-amphetamine. They completed mood questionnaires and cardiovascular measures. RESULTS Individuals with higher MDQ scores reported less stimulation and euphoria after 10 mg, but not 20 mg, d-amphetamine, than individuals with lower scores. MDQ scores were not related to cardiovascular responses to the drug. CONCLUSIONS A history of mood elevation experiences or hypomania states is related to dampened response to a low dose of a psychostimulant drug, extending previous findings with dampened response to alcohol. This phenotype for mood disorders of dampened responses to drugs may contribute to risk for subsequent drug use or misuse.
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Affiliation(s)
- Scott T. Schepers
- Department of Psychiatry and Behavioral Neuroscience, University of Chicago, 5841 S Maryland Ave, MC3077, Chicago, IL 60637, USA
| | - David L. Arndt
- Department of Psychiatry and Behavioral Neuroscience, University of Chicago, 5841 S Maryland Ave, MC3077, Chicago, IL 60637, USA
| | | | - Donald Hedeker
- Department of Public Health Sciences, University of Chicago, Chicago, IL, USA
| | - Harriet de Wit
- Department of Psychiatry and Behavioral Neuroscience, University of Chicago, 5841 S Maryland Ave, MC3077, Chicago, IL, 60637, USA.
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Forero DA, González-Giraldo Y. Convergent functional genomics of cocaine misuse in humans and animal models. THE AMERICAN JOURNAL OF DRUG AND ALCOHOL ABUSE 2019; 46:22-30. [DOI: 10.1080/00952990.2019.1636384] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Diego A. Forero
- Laboratory of NeuroPsychiatric Genetics, Biomedical Sciences Research Group, School of Medicine, Universidad Antonio Nariño, Bogotá, Colombia
- Health Sciences, School of Medicine, Universidad Antonio Nariño, Bogotá, Colombia
| | - Yeimy González-Giraldo
- Departamento de Nutrición y Bioquímica, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
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Lainiola M, Hietala L, Linden AM, Aitta-Aho T. The lack of conditioned place preference, but unaltered stimulatory and ataxic effects of alcohol in mGluR3-KO mice. J Psychopharmacol 2019; 33:855-864. [PMID: 31070489 DOI: 10.1177/0269881119844178] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND Alcohol use associates with environmental cues that can later reinstate drinking patterns without any alcohol exposure. Alcohol-induced reward, when combined with contextual signals of various sensory modalities in the central synapses of mesolimbic reward circuitries, can lead to the formation of conditioned responses. AIMS As the activation of glutamatergic synapses is pivotal in such processes, we aimed to investigate whether the metabotropic glutamate receptor subtype 3 plays a role in alcohol-induced behaviours including place preference. METHODS The metabotropic glutamate receptor subtype 3 knockout (mGluR3-KO) mouse line was used to study alcohol-induced place preference, locomotor activating and ataxic effects, limited access alcohol drinking, and preference for sucrose and saccharin. RESULTS Alcohol-induced horizontal locomotor stimulation and reduced rearing behaviour remained unchanged in the mGluR3-KO mice. However, alcohol-induced place conditioning in an unbiased paradigm setup was lacking in the mGluR3-KO mice, but clearly present in wildtype mice. Locomotor activity was not different between the mGluR3-KO and wildtype mice during the acquisition and expression trials. Alcohol consumption, studied through the 'drinking in the dark' model, remained unchanged in the mGluR3-KO mice, although low consumption in both wildtype and knockout mice hampers interpretation. The mGluR3-KO mice also showed normal sucrose and saccharin preference. CONCLUSIONS These studies indicate a role for metabotropic glutamate receptor subtype 3 in the conditioned contextual alcohol responses, but not in stimulatory, and ataxic alcohol effects.
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Affiliation(s)
- Mira Lainiola
- Department of Pharmacology, University of Helsinki, Helsinki, Finland
| | - Lana Hietala
- Department of Pharmacology, University of Helsinki, Helsinki, Finland
| | - Anni-Maija Linden
- Department of Pharmacology, University of Helsinki, Helsinki, Finland
| | - Teemu Aitta-Aho
- Department of Pharmacology, University of Helsinki, Helsinki, Finland
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Alpha-Synuclein RNA Expression is Increased in Major Depression. Int J Mol Sci 2019; 20:ijms20082029. [PMID: 31027150 PMCID: PMC6515395 DOI: 10.3390/ijms20082029] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 04/18/2019] [Accepted: 04/20/2019] [Indexed: 01/08/2023] Open
Abstract
Alpha-synuclein (SNCA) is a small membrane protein that plays an important role in neuro-psychiatric diseases. It is best known for its abnormal subcellular aggregation in Lewy bodies that serves as a hallmark of Parkinson’s disease (PD). Due to the high comorbidity of PD with depression, we investigated the role of SNCA in patients suffering from major depressive disorder (MDD). SNCA mRNA expression levels were analyzed in peripheral blood cells of MDD patients and a healthy control group. SNCA mRNA expression was positively correlated with severity of depression as indicated by psychometric assessment. We found a significant increase in SNCA mRNA expression levels in severely depressed patients compared with controls. Thus, SNCA analysis could be a helpful target in the search for biomarkers of MDD.
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20
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Persyn W, Houchi H, Papillon CA, Martinetti M, Antol J, Guillaumont C, Dervaux A, Naassila M. Ethanol (EtOH)-Related Behaviors in α-Synuclein Mutant Mice and Association of SNCA SNPs with Anxiety in EtOH-Dependent Patients. Alcohol Clin Exp Res 2018; 42:2172-2185. [PMID: 30120834 DOI: 10.1111/acer.13875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 08/10/2018] [Indexed: 12/25/2022]
Abstract
BACKGROUND Data have shown a role of α-synuclein in anxiety and also in addiction, particularly in alcohol use disorders (AUD). Since the comorbidity between AUD and anxiety is very high and because anxiety is an important factor in ethanol (EtOH) relapse, the aim of the present study was to investigate the role of α-synuclein in moderating EtOH intake, the anxiolytic effects of EtOH, and EtOH withdrawal-induced anxiety and convulsions in mice. The study aimed to determine whether SNCA variants moderated anxiety in EtOH-dependent patients. METHODS We analyzed the moderator effect of 3 SNCA Tag-single nucleotide polymorphisms (Tag-SNPs) rs356200, rs356219, and rs2119787 on the anxiety symptoms in 128 EtOH-dependent patients. We used the C57BL/6JOlaHsd Snca mutant mice to assess EtOH intake; sensitivity to the anxiolytic effects of EtOH in a test battery comprising the open field, the light-dark box, and the elevated plus maze; and both anxiety and convulsions induced by EtOH withdrawal. RESULTS Our results demonstrated a reduction in both EtOH intake and preference and also a lack of sensitivity to the anxiolytic effects of EtOH in α-synuclein mutant mice. Results on anxiety-like behavior were mixed, but mutant mice displayed increased anxiety when exposed to a low anxiogenic environment. Mutant mice also displayed an increase in handling-induced convulsion scores during withdrawal after EtOH inhalation, but did not differ in terms of EtOH withdrawal-induced anxiety. In humans, we found a significant association of the rs356219 SNP with a high level of anxiety (Beck Anxiety Inventory score >15) and the rs356200 SNP with a positive familial history of AUD. CONCLUSIONS Our translational study highlights a significant role of α-synuclein in components of AUD.
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Affiliation(s)
- Wolfgang Persyn
- Research Group on Alcohol & Pharmacodependences (GRAP), Centre Universitaire de Recherche en Santé (CURS) , INSERM U1247, University of Picardie Jules Verne, Amiens, France.,Unité d'alcoologie SESAME , Centre hospitalier Psychiatrique Philippe Pinel, Amiens, France
| | - Hakim Houchi
- Research Group on Alcohol & Pharmacodependences (GRAP), Centre Universitaire de Recherche en Santé (CURS) , INSERM U1247, University of Picardie Jules Verne, Amiens, France
| | - Charles-Antoine Papillon
- Research Group on Alcohol & Pharmacodependences (GRAP), Centre Universitaire de Recherche en Santé (CURS) , INSERM U1247, University of Picardie Jules Verne, Amiens, France
| | - Margaret Martinetti
- Research Group on Alcohol & Pharmacodependences (GRAP), Centre Universitaire de Recherche en Santé (CURS) , INSERM U1247, University of Picardie Jules Verne, Amiens, France.,Department of Psychology , The College of New Jersey, Ewing, New Jersey
| | - Johann Antol
- Research Group on Alcohol & Pharmacodependences (GRAP), Centre Universitaire de Recherche en Santé (CURS) , INSERM U1247, University of Picardie Jules Verne, Amiens, France
| | - Cyrille Guillaumont
- Research Group on Alcohol & Pharmacodependences (GRAP), Centre Universitaire de Recherche en Santé (CURS) , INSERM U1247, University of Picardie Jules Verne, Amiens, France.,Unité d'alcoologie SESAME , Centre hospitalier Psychiatrique Philippe Pinel, Amiens, France
| | - Alain Dervaux
- Research Group on Alcohol & Pharmacodependences (GRAP), Centre Universitaire de Recherche en Santé (CURS) , INSERM U1247, University of Picardie Jules Verne, Amiens, France.,CHU Sud , Service de consultations de Psychiatrie et Addictologie, Amiens Cedex, France
| | - Mickael Naassila
- Research Group on Alcohol & Pharmacodependences (GRAP), Centre Universitaire de Recherche en Santé (CURS) , INSERM U1247, University of Picardie Jules Verne, Amiens, France
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Ramoz N, Gorwood P. Aspects génétiques de l’alcoolo-dépendance. Presse Med 2018; 47:547-553. [DOI: 10.1016/j.lpm.2017.07.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 07/12/2017] [Indexed: 12/31/2022] Open
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Salvatore JE, Savage JE, Barr P, Wolen AR, Aliev F, Vuoksimaa E, Latvala A, Pulkkinen L, Rose RJ, Kaprio J, Dick DM. Incorporating Functional Genomic Information to Enhance Polygenic Signal and Identify Variants Involved in Gene-by-Environment Interaction for Young Adult Alcohol Problems. Alcohol Clin Exp Res 2018; 42:413-423. [PMID: 29121402 PMCID: PMC5785466 DOI: 10.1111/acer.13551] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 11/02/2017] [Indexed: 12/18/2022]
Abstract
BACKGROUND Characterizing aggregate genetic risk for alcohol misuse and identifying variants involved in gene-by-environment (G × E) interaction effects has so far been a major challenge. We hypothesized that functional genomic information could be used to enhance detection of polygenic signal underlying alcohol misuse and to prioritize identification of single nucleotide polymorphisms (SNPs) most likely to exhibit G × E effects. METHODS We examined these questions in the young adult FinnTwin12 sample (n = 1,170). We used genomewide association estimates from an independent sample to derive 2 types of polygenic scores for alcohol problems in FinnTwin12. Genomewide polygenic scores included all SNPs surpassing a designated p-value threshold. DNase polygenic scores were a subset of the genomewide polygenic scores including only variants in DNase I hypersensitive sites (DHSs), which are open chromatin marks likely to index regions with a regulatory function. We conducted parallel analyses using height as a nonpsychiatric model phenotype to evaluate the consistency of effects. For the G × E analyses, we examined whether SNPs in DHSs were overrepresented among SNPs demonstrating significant G × E effects in an interaction between romantic relationship status and intoxication frequency. RESULTS Contrary to our expectations, we found that DNase polygenic scores were not more strongly predictive of alcohol problems than conventional polygenic scores. However, variants in DNase polygenic scores had per-SNP effects that were up to 1.4 times larger than variants in conventional polygenic scores. This same pattern of effects was also observed in supplementary analyses with height. In G × E models, SNPs in DHSs were modestly overrepresented among SNPs with significant interaction effects for intoxication frequency. CONCLUSIONS These findings highlight the potential utility of integrating functional genomic annotation information to increase the signal-to-noise ratio in polygenic scores and identify genetic variants that may be most susceptible to environmental modification.
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Affiliation(s)
- Jessica E. Salvatore
- Department of Psychology, Virginia Commonwealth University, PO Box 842018, Richmond, VA 23284-2018, United States
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, PO Box 980126, Richmond, VA 23298, United States
| | - Jeanne E. Savage
- Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, PO Box 980126, Richmond, VA 23298, United States
| | - Peter Barr
- Department of Psychology, Virginia Commonwealth University, PO Box 842018, Richmond, VA 23284-2018, United States
| | - Aaron R. Wolen
- Center for Clinical and Translational Research, Virginia Commonwealth University, P.O. Box 980261, Richmond, VA 23298-0261, United States
| | - Fazil Aliev
- Department of Psychology, Virginia Commonwealth University, PO Box 842018, Richmond, VA 23284-2018, United States
- Faculty of Business, Karabuk University, 78050 Karabuk, Turkey
| | - Eero Vuoksimaa
- Institute for Molecular Medicine FIMM, University of Helsinki, PO Box 20 (Tukholmankatu 8), FI-00014 Helsinki, Finland
| | - Antti Latvala
- Institute for Molecular Medicine FIMM, University of Helsinki, PO Box 20 (Tukholmankatu 8), FI-00014 Helsinki, Finland
| | - Lea Pulkkinen
- Department of Psychology, University of Jyväskylä, PO Box 35, 40014 University of Jyväskylä, Jyväskylä, Finland
| | - Richard J. Rose
- Department of Psychological & Brain Sciences, Indiana University, 1101 E. 10th St., Bloomington, IN 47405, United States
| | - Jaakko Kaprio
- Institute for Molecular Medicine FIMM, University of Helsinki, PO Box 20 (Tukholmankatu 8), FI-00014 Helsinki, Finland
| | - Danielle M. Dick
- Department of Psychology, Virginia Commonwealth University, PO Box 842018, Richmond, VA 23284-2018, United States
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Xiao HW, Ge C, Feng GX, Li Y, Luo D, Dong JL, Li H, Wang H, Cui M, Fan SJ. Gut microbiota modulates alcohol withdrawal-induced anxiety in mice. Toxicol Lett 2018; 287:23-30. [PMID: 29391279 DOI: 10.1016/j.toxlet.2018.01.021] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 01/17/2018] [Accepted: 01/24/2018] [Indexed: 02/08/2023]
Abstract
Excessive alcohol consumption remains a major public health problem that affects millions of people worldwide. Accumulative experimental evidence has suggested an important involvement of gut microbiota in the modulation of host's immunological and neurological functions. However, it is previously unknown whether enteric microbiota is implicated in the formation of alcohol withdrawal-induced anxiety. Using a murine model of chronic alcoholism and withdrawal, we examined the impact of alcohol consumption on the possible alterations of gut microbiota as well as alcohol withdrawal-induced anxiety and behavior changes. The 16S rRNA sequencing revealed that alcohol consumption did not alter the abundance of bacteria, but markedly changed the composition of gut microbiota. Moreover, the transplantation of enteric microbes from alcohol-fed mice to normal healthy controls remarkably shaped the composition of gut bacteria, and elicited behavioral signs of alcohol withdrawal-induced anxiety. Using quantitative real-time polymerase chain reaction, we further confirmed that the expression of genes implicated in alcohol addiction, BDNF, CRHR1 and OPRM1, was also altered by transplantation of gut microbes from alcohol-exposed donors. Collectively, our findings suggested a possibility that the alterations of gut microbiota composition might contribute to the development of alcohol withdrawal-induced anxiety, and reveal potentially new etiologies for treating alcohol addiction.
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Affiliation(s)
- Hui-Wen Xiao
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, 238 Baidi Road, Tianjin 300192, China
| | - Chang Ge
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, 238 Baidi Road, Tianjin 300192, China
| | - Guo-Xing Feng
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, 238 Baidi Road, Tianjin 300192, China
| | - Yuan Li
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, 238 Baidi Road, Tianjin 300192, China
| | - Dan Luo
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, 238 Baidi Road, Tianjin 300192, China
| | - Jia-Li Dong
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, 238 Baidi Road, Tianjin 300192, China
| | - Hang Li
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, 238 Baidi Road, Tianjin 300192, China
| | - Haichao Wang
- Department of Emergency Medicine, North Shore University Hospital, Laboratory of Emergency Medicine, the Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY 11030, USA
| | - Ming Cui
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, 238 Baidi Road, Tianjin 300192, China.
| | - Sai-Jun Fan
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, 238 Baidi Road, Tianjin 300192, China.
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Blum K, Modestino EJ, Gondré-Lewis MC, Neary J, Siwicki D, Hauser M, Barh D, Steinberg B, Badgaiyan RD. GLOBAL OPIOID EPIDEMIC: DOOMED TO FAIL WITHOUT GENETICALLY BASED PRECISION ADDICTION MEDICINE (PAM ™): LESSONS LEARNED FROM AMERICA. PRECISION MEDICINE 2017; 2:17-22. [PMID: 29372187 PMCID: PMC5778881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
It is a reality that globally opioid deaths have soared for men and women of all social, economic status and age from heroin and fentanyl overdoses. Specifically, in the United States, deaths from narcotic overdoses have reached alarming metrics since 2010. In fact, the Fentanyl rise is driven by drug dealers who sell it as heroin or who use it to lace cocaine or to make illegal counterfeit prescription opioids. The President's Commission on the crisis has linked the death toll as equivalent to "September 11th every three weeks." In fact, The U.S. Centre for Disease Control (CDC) released data showing that opioid-related overdoses were up 15% in the first three quarters of 2016 compared to 2015. Various governmental organizations including NIDA, are actively seeking solutions. However, we argue that unless the scientific community embraces genetic addiction risk coupled with potential precision or personalized medicine to induce "dopamine homeostasis" it will fail. We now have evidence that a ten-gene and eleven single nucleotide polymorphism (SNP) panel predicts Addiction Severity Index (ASI) for both alcohol and drugs of abuse (e.g., Opioids). In a large multi-addiction centre study involving seven diverse treatment programs, the genetic addiction risk score (GARS™) was shown to have a predictive relationship with ASI-MV derived alcohol (≥ seven alleles), and other drugs (≥ 4 alleles) severity risk scores. In a number of neuroimaging studies, we also display that in both animal (bench) and abstinent Chinese severe heroin-dependent patients (bedside), BOLD dopamine activation across the brain reward circuitry revealed increases in resting state functional connectivity as well volume connectivity. It is also known that published nutrigenomic (coupling gene polymorphisms with altered KB220z) studies reveal improved clinical outcomes related to obesity.
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Affiliation(s)
- Kenneth Blum
- Department of Psychiatry, University of Florida & McKnight Brain
Institute, College of Florida, Gainesville, FL, USA
- Department of Psychiatry, Human Integrated Services Unit University
of Vermont Center for Clinical & Translational Science, College of Medicine,
Burlington, VT, USA
- Department of Clinical Neurology, Path Research Foundation, NY, NY,
USA
- Dominion Diagnostics, LLC, North Kingstown, RI, USA
- Department of Psychiatry, Wright State University, Boonshoft School
of Medicine, Dayton, OH USA
- Division of Genetic Testing, Geneus Health LLC, San Antonio, Texas,
USA
- Center for Genomics and Applied Gene Technology, Institute of
Integrative Omics and Applied Biotechnology (IIOAB), Nonakuri, Purba Medinipur, West
Bengal, India
- Institute of Psychology, Eötvös Loránd
University Budapest, Hungary
- Department of Psychiatry, University of Southern California, Keck
School of Medicine, Los Angeles, CA, USA
- Division of Neuroscience Based Addiction Research and Therapy, The
Shores Treatment & Recovery Center, Port t. Lucie, Fl. USA
| | | | - Marjorie C. Gondré-Lewis
- Departments of Anatomy, Psychiatry & Behavioral Sciences,
Howard University, Washington, DC, USA
| | - Jennifer Neary
- Division of Genetic Testing, Geneus Health LLC, San Antonio, Texas,
USA
| | - David Siwicki
- Division of Genetic Testing, Geneus Health LLC, San Antonio, Texas,
USA
| | - Mary Hauser
- Dominion Diagnostics, LLC, North Kingstown, RI, USA
| | - Debmalya Barh
- Center for Genomics and Applied Gene Technology, Institute of
Integrative Omics and Applied Biotechnology (IIOAB), Nonakuri, Purba Medinipur, West
Bengal, India
| | | | - Rajendra D. Badgaiyan
- Department of Psychiatry, Richmond University Hospital, Icahn
School of Medicine, New York, NY, USA
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25
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Rotermund C, Reolon GK, Leixner S, Boden C, Bilbao A, Kahle PJ. Enhanced motivation to alcohol in transgenic mice expressing human α-synuclein. J Neurochem 2017; 143:294-305. [PMID: 28833174 DOI: 10.1111/jnc.14151] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Revised: 07/20/2017] [Accepted: 08/14/2017] [Indexed: 12/17/2022]
Abstract
α-Synuclein (αSYN) is the neuropathological hallmark protein of Parkinson's disease (PD) and related neurodegenerative disorders. Moreover, the gene encoding αSYN (SNCA) is a major genetic contributor to PD. Interestingly, independent genome-wide association studies also identified SNCA as the most important candidate gene for alcoholism. Furthermore, single-nucleotide-polymorphisms have been associated with alcohol-craving behavior and alcohol-craving patients showed augmented αSYN expression in blood. To investigate the effect of αSYN on the addictive properties of chronic alcohol use, we examined consumption, motivation, and seeking responses induced by environmental stimuli and relapse behavior in transgenic mice expressing the human mutant [A30P]αSYN throughout the brain. The primary reinforcing effects of alcohol under operant self-administration conditions were increased, while consumption and the alcohol deprivation effect were not altered in the transgenic mice. The same mice were subjected to immunohistochemical measurements of immediate-early gene inductions in brain regions involved in addiction-related behaviors. Acute ethanol injection enhanced immunostaining for the phosphorylated form of cAMP response element binding protein in both amygdala and nucleus accumbens of αSYN transgenic mice, while in wild-type mice no effect was visible. However, at the same time, levels of cFos remain unchanged in both genotypes. These results provide experimental confirmation of SNCA as a candidate gene for alcoholism in addition to its known link to PD.
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Affiliation(s)
- Carola Rotermund
- Laboratory of Functional Neurogenetics, Department of Neurodegeneration, German Center of Neurodegenerative Diseases, Tübingen, Germany
| | - Gustavo K Reolon
- Laboratory of Functional Neurogenetics, Department of Neurodegeneration, Hertie Institute of Clinical Brain Research, Faculty of Medicine, University of Tübingen, Tübingen, Germany
| | - Sarah Leixner
- Behavioral Genetics Research Group, Institute of Psychopharmacology, Central Institute of Mental Health, Medical Faculty of Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Cindy Boden
- Laboratory of Functional Neurogenetics, Department of Neurodegeneration, German Center of Neurodegenerative Diseases, Tübingen, Germany
| | - Ainhoa Bilbao
- Behavioral Genetics Research Group, Institute of Psychopharmacology, Central Institute of Mental Health, Medical Faculty of Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Philipp J Kahle
- Laboratory of Functional Neurogenetics, Department of Neurodegeneration, German Center of Neurodegenerative Diseases, Tübingen, Germany.,Laboratory of Functional Neurogenetics, Department of Neurodegeneration, Hertie Institute of Clinical Brain Research, Faculty of Medicine, University of Tübingen, Tübingen, Germany
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Bell RL, Hauser SR, Liang T, Sari Y, Maldonado-Devincci A, Rodd ZA. Rat animal models for screening medications to treat alcohol use disorders. Neuropharmacology 2017; 122:201-243. [PMID: 28215999 PMCID: PMC5659204 DOI: 10.1016/j.neuropharm.2017.02.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Revised: 02/02/2017] [Accepted: 02/05/2017] [Indexed: 01/21/2023]
Abstract
The purpose of this review is to present animal research models that can be used to screen and/or repurpose medications for the treatment of alcohol abuse and dependence. The focus will be on rats and in particular selectively bred rats. Brief introductions discuss various aspects of the clinical picture, which provide characteristics of individuals with alcohol use disorders (AUDs) to model in animals. Following this, multiple selectively bred rat lines will be described and evaluated in the context of animal models used to screen medications to treat AUDs. Next, common behavioral tests for drug efficacy will be discussed particularly as they relate to stages in the addiction cycle. Tables highlighting studies that have tested the effects of compounds using the respective techniques are included. Wherever possible the Tables are organized chronologically in ascending order to describe changes in the focus of research on AUDs over time. In general, high ethanol-consuming selectively bred rats have been used to test a wide range of compounds. Older studies usually followed neurobiological findings in the selected lines that supported an association with a propensity for high ethanol intake. Most of these tests evaluated the compound's effects on the maintenance of ethanol drinking. Very few compounds have been tested during ethanol-seeking and/or relapse and fewer still have assessed their effects during the acquisition of AUDs. Overall, while a substantial number of neurotransmitter and neuromodulatory system targets have been assessed; the roles of sex- and age-of-animal, as well as the acquisition of AUDs, ethanol-seeking and relapse continue to be factors and behaviors needing further study. This article is part of the Special Issue entitled "Alcoholism".
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Affiliation(s)
- Richard L Bell
- Indiana University School of Medicine, Department of Psychiatry, Indianapolis, IN 46202, USA.
| | - Sheketha R Hauser
- Indiana University School of Medicine, Department of Psychiatry, Indianapolis, IN 46202, USA
| | - Tiebing Liang
- Indiana University School of Medicine, Department of Gastroenterology, Indianapolis, IN 46202, USA
| | - Youssef Sari
- University of Toledo, Department of Pharmacology, Toledo, OH 43614, USA
| | | | - Zachary A Rodd
- Indiana University School of Medicine, Department of Psychiatry, Indianapolis, IN 46202, USA
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Vassoler FM, Oliver DJ, Wyse C, Blau A, Shtutman M, Turner JR, Byrnes EM. Transgenerational attenuation of opioid self-administration as a consequence of adolescent morphine exposure. Neuropharmacology 2017; 113:271-280. [PMID: 27729240 PMCID: PMC5248554 DOI: 10.1016/j.neuropharm.2016.10.006] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 09/29/2016] [Accepted: 10/07/2016] [Indexed: 01/13/2023]
Abstract
The United States is in the midst of an opiate epidemic, with abuse of prescription and illegal opioids increasing steadily over the past decade. While it is clear that there is a genetic component to opioid addiction, there is a significant portion of heritability that cannot be explained by genetics alone. The current study was designed to test the hypothesis that maternal exposure to opioids prior to pregnancy alters abuse liability in subsequent generations. Female adolescent Sprague Dawley rats were administered morphine at increasing doses (5-25 mg/kg, s.c.) or saline for 10 days (P30-39). During adulthood, animals were bred with drug-naïve colony males. Male and female adult offspring (F1 animals) were tested for morphine self-administration acquisition, progressive ratio, extinction, and reinstatement at three doses of morphine (0.25, 0.75, 1.25 mg/kg/infusion). Grandoffspring (F2 animals, from the maternal line) were also examined. Additionally, gene expression changes within the nucleus accumbens were examined with RNA deep sequencing (PacBio) and qPCR. There were dose- and sex-dependent effects on all phases of the self-administration paradigm that indicate decreased morphine reinforcement and attenuated relapse-like behavior. Additionally, genes related to synaptic plasticity, as well as myelin basic protein (MBP), were dysregulated. Some, but not all, effects persisted into the subsequent (F2) generation. The results demonstrate that even limited opioid exposure during adolescence can have lasting effects across multiple generations, which has implications for mechanisms of the transmission of drug abuse liability in humans.
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Affiliation(s)
- Fair M Vassoler
- Cummings School at Tufts University, 200 Westboro Road, North Grafton, MA 01536, USA.
| | - David J Oliver
- University of South Carolina College of Pharmacy, 773 Sumter St, Columbia, SC 29208, USA
| | - Cristina Wyse
- Cummings School at Tufts University, 200 Westboro Road, North Grafton, MA 01536, USA
| | - Ashley Blau
- Cummings School at Tufts University, 200 Westboro Road, North Grafton, MA 01536, USA
| | - Michael Shtutman
- University of South Carolina College of Pharmacy, 773 Sumter St, Columbia, SC 29208, USA
| | - Jill R Turner
- University of South Carolina College of Pharmacy, 773 Sumter St, Columbia, SC 29208, USA
| | - Elizabeth M Byrnes
- Cummings School at Tufts University, 200 Westboro Road, North Grafton, MA 01536, USA
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Blum K, Febo M, Badgaiyan RD, Demetrovics Z, Simpatico T, Fahlke C, Li M, Dushaj K, Gold MS. Common Neurogenetic Diagnosis and Meso-Limbic Manipulation of Hypodopaminergic Function in Reward Deficiency Syndrome (RDS): Changing the Recovery Landscape. Curr Neuropharmacol 2017; 15:184-194. [PMID: 27174576 PMCID: PMC5327445 DOI: 10.2174/1570159x13666160512150918] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 04/11/2016] [Accepted: 04/21/2016] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND In 1990, Blum and associates provided the first confirmed genetic link between the DRD2 polymorphisms and alcoholism. This finding was based on an earlier conceptual framework, which served as a blueprint for their seminal genetic association discovery they termed "Brain Reward Cascade." These findings were followed by a new way of understanding all addictive behaviors (substance and non-substance) termed "Reward Deficiency Syndrome" (RDS). RDS incorporates a complex multifaceted array of inheritable behaviors that are polygenic. OBJECTIVE In this review article, we attempt to clarify these terms and provide a working model to accurately diagnose and treat these unwanted behaviors. METHOD We are hereby proposing the development of a translational model we term "Reward Deficiency Solution System™" that incorporates neurogenetic testing and meso-limbic manipulation of a "hypodopaminergic" trait/state, which provides dopamine agonistic therapy (DAT) as well as reduced "dopamine resistance," while embracing "dopamine homeostasis." RESULT The result is better recovery and relapse prevention, despite DNA antecedents, which could impact the recovery process and relapse. Understanding the commonality of mental illness will transform erroneous labeling based on symptomatology, into a genetic and anatomical etiology. WC: 184.
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Affiliation(s)
- Kenneth Blum
- Department of Psychiatry, University of Florida College of Medicine and McKnight Brain Institute, Gainesville, FL, USA
- Department of Nutrigenomics, RDSolutions, Inc., Salt Lake City, UT, USA
- Department of Psychology, Eotvos Lorand University, Budapest, Hungary
- PATH Foundation NY, New York, NY, USA
- Division of Neuroscience Research and Addiction Therapy, The Shores Treatment and Recovery, Port Saint Lucie, FL, USA
| | - Marcelo Febo
- Department of Psychiatry, University of Florida College of Medicine and McKnight Brain Institute, Gainesville, FL, USA
| | - Rajendra D. Badgaiyan
- Division of Neuroimaging, Department of Psychiatry, University of Minnesota College of Medicine, Minneapolis, MN, USA;
| | - Zsolt Demetrovics
- Department of Psychology, Eotvos Lorand University, Budapest, Hungary
| | - Thomas Simpatico
- Department of Psychiatry, University of Vermont, Burlington, VT, USA
| | - Claudia Fahlke
- Department of Psychology, University of Gothenburg, Göteborg, Sweden;
| | - Oscar-Berman M
- Departments of Psychiatry and Anatomy & Neurobiology, Boston University School of Medicine and Boston VA Healthcare System, Boston, MA, USA
| | - Mona Li
- PATH Foundation NY, New York, NY, USA
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Heilig M, Barbier E, Johnstone AL, Tapocik J, Meinhardt MW, Pfarr S, Wahlestedt C, Sommer WH. Reprogramming of mPFC transcriptome and function in alcohol dependence. GENES, BRAIN, AND BEHAVIOR 2017; 16:86-100. [PMID: 27657733 PMCID: PMC5555395 DOI: 10.1111/gbb.12344] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 08/30/2016] [Accepted: 09/19/2016] [Indexed: 01/07/2023]
Abstract
Despite its limited immediate reinforcement value, alcohol has a potent ability to induce neuroadaptations that promote its incentive salience, escalation of voluntary alcohol intake and aversion-resistant alcohol seeking. A constellation of these traits, collectively called 'post-dependent', emerges following brain exposure to repeated cycles of intoxication and withdrawal. The medial prefrontal cortex (mPFC) and its subdivisions exert top-down regulation of approach and avoidance behaviors, including those that lead to alcohol intake. Here, we review an emerging literature which indicates that a reprogramming of mPFC function occurs with prolonged exposure of the brain to cycles of alcohol intoxication and withdrawal. This reprogramming results in molecular dysregulations that contribute to the post-dependent syndrome. Convergent evidence has identified neuroadaptations resulting in altered glutamatergic and BDNF-mediated signaling, and for these pathways, direct evidence for a mechanistic role has been obtained. Additional evidence points to a dysregulation of pathways involving calcium homeostasis and neurotransmitter release. Recent findings indicate that global DNA hypermethylation is a key factor in reprogramming the mPFC genome after a history of dependence. As one of the results of this epigenetic remodeling, several histone modifying epigenetic enzymes are repressed. Among these, PR-domain zinc-finger protein 2, a methyltransferase that selectively mono-methylates histone H3 at lysine 9 has been functionally validated to drive several of the molecular and behavioral long-term consequences of alcohol dependence. Information processing within the mPFC involves formation of dynamic neuronal networks, or functional ensembles that are shaped by transcriptional responses. The epigenetic dysregulations identified by our molecular studies are likely to alter this dynamic processing in multiple ways. In summary, epigenetic molecular switches in the mPFC appear to be turned on as alcoholism develops. Strategies to reverse these processes may offer targets for disease-modifying treatments.
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Affiliation(s)
- M. Heilig
- Center for Social and Affective Neuroscience, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - E. Barbier
- Center for Social and Affective Neuroscience, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - A. L. Johnstone
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, USA
| | - J. Tapocik
- Center for Social and Affective Neuroscience, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - M. W. Meinhardt
- Department of Psychopharmacology, Central Institute of Mental Health, University of Heidelberg, Mannheim, Germany
| | - S. Pfarr
- Department of Psychopharmacology, Central Institute of Mental Health, University of Heidelberg, Mannheim, Germany
| | - C. Wahlestedt
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, USA
| | - W. H. Sommer
- Department of Psychopharmacology, Central Institute of Mental Health, University of Heidelberg, Mannheim, Germany
- Department of Addiction Medicine, Central Institute of Mental Health, University of Heidelberg, Mannheim, Germany
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Horiuchi Y, Kondo MA, Okada K, Takayanagi Y, Tanaka T, Ho T, Varvaris M, Tajinda K, Hiyama H, Ni K, Colantuoni C, Schretlen D, Cascella NG, Pevsner J, Ishizuka K, Sawa A. Molecular signatures associated with cognitive deficits in schizophrenia: a study of biopsied olfactory neural epithelium. Transl Psychiatry 2016; 6:e915. [PMID: 27727244 PMCID: PMC5315541 DOI: 10.1038/tp.2016.154] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 06/21/2016] [Accepted: 07/12/2016] [Indexed: 01/10/2023] Open
Abstract
Cognitive impairment is a key feature of schizophrenia (SZ) and determines functional outcome. Nonetheless, molecular signatures in neuronal tissues that associate with deficits are not well understood. We conducted nasal biopsy to obtain olfactory epithelium from patients with SZ and control subjects. The neural layers from the biopsied epithelium were enriched by laser-captured microdissection. We then performed an unbiased microarray expression study and implemented a systematic neuropsychological assessment on the same participants. The differentially regulated genes in SZ were further filtered based on correlation with neuropsychological traits. This strategy identified the SMAD 5 gene, and real-time quantitative PCR analysis also supports downregulation of the SMAD pathway in SZ. The SMAD pathway has been important in multiple tissues, including the role for neurodevelopment and bone formation. Here the involvement of the pathway in adult brain function is suggested. This exploratory study establishes a strategy to better identify neuronal molecular signatures that are potentially associated with mental illness and cognitive deficits. We propose that the SMAD pathway may be a novel target in addressing cognitive deficit of SZ in future studies.
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Affiliation(s)
- Y Horiuchi
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - M A Kondo
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - K Okada
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - Y Takayanagi
- Department of Mental Health, Johns Hopkins University, Baltimore, MD, USA
| | - T Tanaka
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - T Ho
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - M Varvaris
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - K Tajinda
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - H Hiyama
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - K Ni
- Pharmacology Research Labs, Astellas Pharma Inc., Tsukuba-shi, Ibaraki, Japan
| | - C Colantuoni
- Lieber Institute for Brain Development, Baltimore, MD, USA
| | - D Schretlen
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - N G Cascella
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - J Pevsner
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA,Hugo W Moser Research Institute at Kennedy Krieger, Baltimore, MD, USA
| | - K Ishizuka
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - A Sawa
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA,Department of Mental Health, Johns Hopkins University, Baltimore, MD, USA,Department of Psychiatry, Johns Hopkins School of Medicine, 600 North Wolfe Street, Meyer 3-166A, Baltimore, MD 21287, USA. E-mail:
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Blum K, Downs B, Dushaj K, Li M, Braverman ER, Fried L, Waite R, Demotrovics Z, Badgaiyan RD. THE BENEFITS OF CUSTOMIZED DNA DIRECTED NUTRITION TO BALANCE THE BRAIN REWARD CIRCUITRY AND REDUCE ADDICTIVE BEHAVIORS. PRECISION MEDICINE 2016; 1:18-33. [PMID: 28066828 PMCID: PMC5210211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
DNA Customization of nutraceutical products is here. In the truest sense, "Gene Guided Precision Nutrition™" and KB220 variants (a complex mixture of amino-acids, trace metals, and herbals) are the pioneers and standard-bearers for a state of the art DNA customization. Findings by both, Kenneth Blum, Ph.D. and Ernest Noble, Ph.D. concerning the role of genes in shaping cravings and pleasure- seeking, opened the doors to comprehension of how genetics control our actions and effect our mental and physical health. Moreover, technology that is related to KB220 variants in order to reduce or eradicate excessive cravings by influencing gene expression is a cornerstone in the pioneering of the practical applications of nutrigenomics. Continuing discoveries have been an important catalyst for the evolution, expansion, and scientific recognition of the significance of nutrigenomics and its remarkable contributions to human health. Neuro-Nutrigenomics is now a very important field of scientific investigation that offers great promise to improving the human condition. In the forefront is the development of the Genetic Addiction Risk Score (GARS™), which unlike 23andMe, has predictive value for the severity of drug and alcohol abuse as well as other non-substance related addictive behaviors. While customization of neuronutrients has not yet been commercialized, there is emerging evidence that in the future, the concept will be developed and could have a significant impact in addiction medicine.
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Affiliation(s)
- Kenneth Blum
- Department of Psychiatry & McKnight Brain Institute, University of Florida College of Medicine, Gainesville, FL, USA
- Departments of Psychiatry & Behavioral Sciences, Keck School of Medicine of USC, Los Angeles, CA, USA
- Department of Clinical Neurology, PATH Foundation NY, New York, NY, USA
- Human Integrated Services Unit, University of Vermont Centre for Clinical & Translational Science, College of Medicine, Burlington, VT, USA
- Division of Addiction Services, Dominion Diagnostics, LLC., North Kingstown, RI, USA
- Division of Neuroscience-based Therapy, Summit Estate Recovery Center, Los Gatos, CA, USA
- The Shores Treatment & Recovery, Port Saint Lucie, FL, USA
- Department of Precision Medicine, IGENE, LLC., Austin, TX, USA
- Division of Nutrigenomics, LaVitaRDS, Draper, UT, USA
- Institute of Psychology, Eötvös Loránd University Budapest, HUNGARY
| | - B.W. Downs
- Victory Nutrition International, Lederoch, PA, USA
| | - Kristina Dushaj
- Department of Clinical Neurology, PATH Foundation NY, New York, NY, USA
| | - Mona Li
- Department of Clinical Neurology, PATH Foundation NY, New York, NY, USA
| | - Eric R. Braverman
- Department of Clinical Neurology, PATH Foundation NY, New York, NY, USA
| | - Lyle Fried
- The Shores Treatment & Recovery, Port Saint Lucie, FL, USA
| | - Roger Waite
- Division of Nutrigenomics, LaVitaRDS, Draper, UT, USA
| | | | - Rajendra D. Badgaiyan
- Department of Psychiatry, Laboratory of Molecular and Functional Imaging, University at Minnesota, Minneapolis, MN, USA
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Mood, stress and longevity: convergence on ANK3. Mol Psychiatry 2016; 21:1037-49. [PMID: 27217151 PMCID: PMC9798616 DOI: 10.1038/mp.2016.65] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/10/2016] [Accepted: 03/14/2016] [Indexed: 01/01/2023]
Abstract
Antidepressants have been shown to improve longevity in C. elegans. It is plausible that orthologs of genes involved in mood regulation and stress response are involved in such an effect. We sought to understand the underlying biology. First, we analyzed the transcriptome from worms treated with the antidepressant mianserin, previously identified in a large-scale unbiased drug screen as promoting increased lifespan in worms. We identified the most robust treatment-related changes in gene expression, and identified the corresponding human orthologs. Our analysis uncovered a series of genes and biological pathways that may be at the interface between antidepressant effects and longevity, notably pathways involved in drug metabolism/degradation (nicotine and melatonin). Second, we examined which of these genes overlap with genes which may be involved in depressive symptoms in an aging non-psychiatric human population (n=3577), discovered using a genome-wide association study (GWAS) approach in a design with extremes of distribution of phenotype. Third, we used a convergent functional genomics (CFG) approach to prioritize these genes for relevance to mood disorders and stress. The top gene identified was ANK3. To validate our findings, we conducted genetic and gene-expression studies, in C. elegans and in humans. We studied C. elegans inactivating mutants for ANK3/unc-44, and show that they survive longer than wild-type, particularly in older worms, independently of mianserin treatment. We also show that some ANK3/unc-44 expression is necessary for the effects of mianserin on prolonging lifespan and survival in the face of oxidative stress, particularly in younger worms. Wild-type ANK3/unc-44 increases in expression with age in C. elegans, and is maintained at lower youthful levels by mianserin treatment. These lower levels may be optimal in terms of longevity, offering a favorable balance between sufficient oxidative stress resistance in younger worms and survival effects in older worms. Thus, ANK3/unc-44 may represent an example of antagonistic pleiotropy, in which low-expression level in young animals are beneficial, but the age-associated increase becomes detrimental. Inactivating mutations in ANK3/unc-44 reverse this effect and cause detrimental effects in young animals (sensitivity to oxidative stress) and beneficial effect in old animals (increased survival). In humans, we studied if the most significant single nucleotide polymorphism (SNP) for depressive symptoms in ANK3 from our GWAS has a relationship to lifespan, and show a trend towards longer lifespan in individuals with the risk allele for depressive symptoms in men (odds ratio (OR) 1.41, P=0.031) but not in women (OR 1.08, P=0.33). We also examined whether ANK3, by itself or in a panel with other top CFG-prioritized genes, acts as a blood gene-expression biomarker for biological age, in two independent cohorts, one of live psychiatric patients (n=737), and one of suicide completers from the coroner's office (n=45). We show significantly lower levels of ANK3 expression in chronologically younger individuals than in middle age individuals, with a diminution of that effect in suicide completers, who presumably have been exposed to more severe and acute negative mood and stress. Of note, ANK3 was previously reported to be overexpressed in fibroblasts from patients with Hutchinson-Gilford progeria syndrome, a form of accelerated aging. Taken together, these studies uncover ANK3 and other genes in our dataset as biological links between mood, stress and longevity/aging, that may be biomarkers as well as targets for preventive or therapeutic interventions. Drug repurposing bioinformatics analyses identified the relatively innocuous omega-3 fatty acid DHA (docosahexaenoic acid), piracetam, quercetin, vitamin D and resveratrol as potential longevity promoting compounds, along with a series of existing drugs, such as estrogen-like compounds, antidiabetics and sirolimus/rapamycin. Intriguingly, some of our top candidate genes for mood and stress-modulated longevity were changed in expression in opposite direction in previous studies in the Alzheimer disease. Additionally, a whole series of others were changed in expression in opposite direction in our previous studies on suicide, suggesting the possibility of a "life switch" actively controlled by mood and stress.
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Bell RL, Hauser SR, McClintick J, Rahman S, Edenberg HJ, Szumlinski KK, McBride WJ. Ethanol-Associated Changes in Glutamate Reward Neurocircuitry: A Minireview of Clinical and Preclinical Genetic Findings. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2015; 137:41-85. [PMID: 26809998 DOI: 10.1016/bs.pmbts.2015.10.018] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Herein, we have reviewed the role of glutamate, the major excitatory neurotransmitter in the brain, in a number of neurochemical, -physiological, and -behavioral processes mediating the development of alcohol dependence. The findings discussed include results from both preclinical as well as neuroimaging and postmortem clinical studies. Expression levels for a number of glutamate-associated genes and/or proteins are modulated by alcohol abuse and dependence. These changes in expression include metabotropic receptors and ionotropic receptor subunits as well as different glutamate transporters. Moreover, these changes in gene expression parallel the pharmacologic manipulation of these same receptors and transporters. Some of these gene expression changes may have predated alcohol abuse and dependence because a number of glutamate-associated polymorphisms are related to a genetic predisposition to develop alcohol dependence. Other glutamate-associated polymorphisms are linked to age at the onset of alcohol-dependence and initial level of response/sensitivity to alcohol. Finally, findings of innate and/or ethanol-induced glutamate-associated gene expression differences/changes observed in a genetic animal model of alcoholism, the P rat, are summarized. Overall, the existing literature indicates that changes in glutamate receptors, transporters, enzymes, and scaffolding proteins are crucial for the development of alcohol dependence and there is a substantial genetic component to these effects. This indicates that continued research into the genetic underpinnings of these glutamate-associated effects will provide important novel molecular targets for treating alcohol abuse and dependence.
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Affiliation(s)
- Richard L Bell
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, Indiana, USA.
| | - Sheketha R Hauser
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Jeanette McClintick
- Departments of Biochemistry and Molecular Biology and Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana , USA
| | - Shafiqur Rahman
- Department of Pharmaceutical Sciences, South Dakota State University, Brookings, South Dakota, USA
| | - Howard J Edenberg
- Departments of Biochemistry and Molecular Biology and Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana , USA
| | - Karen K Szumlinski
- Department of Psychological and Brain Sciences, University of California Santa Barbara, Santa Barbara, California, USA
| | - William J McBride
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, Indiana, USA
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Have we been ignoring the elephant in the room? Seven arguments for considering the cerebellum as part of addiction circuitry. Neurosci Biobehav Rev 2015; 60:1-11. [PMID: 26602022 DOI: 10.1016/j.neubiorev.2015.11.005] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 11/09/2015] [Accepted: 11/16/2015] [Indexed: 12/23/2022]
Abstract
Addiction involves alterations in multiple brain regions that are associated with functions such as memory, motivation and executive control. Indeed, it is now well accepted that addictive drugs produce long-lasting molecular and structural plasticity changes in corticostriatal-limbic loops. However, there are brain regions that might be relevant to addiction other than the prefrontal cortex, amygdala, hippocampus and basal ganglia. In addition to these circuits, a growing amount of data suggests the involvement of the cerebellum in many of the brain functions affected in addicts, though this region has been overlooked, traditionally, in the addiction field. Therefore, in the present review we provide seven arguments as to why we should consider the cerebellum in drug addiction. We present and discuss compelling evidence about the effects of drugs of abuse on cerebellar plasticity, the involvement of the cerebellum in drug-induced cue-related memories, and several findings showing that the instrumental memory and executive functions also recruit the cerebellar circuitry. In addition, a hypothetical model of the cerebellum's role relative to other areas within corticostriatal-limbic networks is also provided. Our goal is not to review animal and human studies exhaustively but to support the inclusion of cerebellar alterations as a part of the physiopathology of addiction disorder.
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Janeczek P, Brooker C, Dodd PR, Lewohl JM. Differential expression of α-synuclein splice variants in the brain of alcohol misusers: Influence of genotype. Drug Alcohol Depend 2015; 155:284-92. [PMID: 26297298 DOI: 10.1016/j.drugalcdep.2015.05.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 05/28/2015] [Accepted: 05/28/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND Chronic alcohol misuse causes damage in the central nervous system that may lead to tolerance, craving and dependence. These behavioural changes are likely the result of cellular adaptations that include changes in gene expression. α-Synuclein is involved in the dopaminergic reward pathway, where it regulates dopamine synthesis and release. Previous studies have found that the gene for α-synuclein, SNCA, is differentially expressed in alcohol misusers. METHODS The present study measured the expression of three α-synuclein variants, SNCA-140, SNCA-112, and SNCA-115 in the prefrontal cortex of controls and alcohol misusers with and without cirrhosis of the liver. In addition, eight SNPs located in the 5'- and 3'-UTRs were genotyped in a Caucasian population of 125 controls and 115 alcohol misusers. RESULTS The expression of SNCA-140 and SNCA-112 was significantly lower in alcohol misusers with cirrhosis than in controls. However, SNCA-115 expression was significantly greater in alcohol misusers with cirrhosis than in controls. Allele and genotype frequencies differed significantly between alcohol misusers and controls for three SNPs, rs356221, rs356219 and rs2736995. Two SNPs, rs356221 and rs356219, were in high linkage disequilibrium. There was no increased risk of alcoholism associated with specific genotypes or haplotypes. Our results suggest that the rs356219/356221 G-A haplotype may decrease the chance of having an alcohol misuse phenotype. CONCLUSION These findings suggest that alcohol misuse may alter the expression of the individual α-synuclein splice variants differently in human brain. There was no evidence of an effect of sequence variation on the expression of α-synuclein splice variants in this population.
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Affiliation(s)
- Paulina Janeczek
- Menzies Health Institute Queensland, School of Medical Sciences, Griffith University, Gold Coast Campus, Southport, Australia
| | - Corinne Brooker
- Menzies Health Institute Queensland, School of Medical Sciences, Griffith University, Gold Coast Campus, Southport, Australia
| | - Peter R Dodd
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Australia
| | - Joanne M Lewohl
- Menzies Health Institute Queensland, School of Medical Sciences, Griffith University, Gold Coast Campus, Southport, Australia.
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Blum K, Hauser M, Fratantonio J, Badgaiyan RD. Molecular Genetic Testing in Pain and Addiction: Facts, Fiction and Clinical Utility. ACTA ACUST UNITED AC 2015; 2:1-5. [PMID: 26807291 DOI: 10.1515/addge-2015-0001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The Brain Reward Cascade (BRC) is an interaction of neurotransmitters and their respective genes to control the amount of dopamine released within the brain. Any variations within this pathway, whether genetic or environmental (epigenetic), may result in addictive behaviors as well as altered pain tolerance. While there are many studies claiming a genetic association with addiction and other behavioral infractions, defined as Reward Deficiency Syndrome (RDS), not all are scientifically accurate and in some case just wrong. Albeit our bias, we discuss herein the facts and fictions behind molecular genetic testing in RDS (including pain and addiction) and the significance behind the development of the Genetic Addiction Risk Score (GARSPREDX™), the first test to accurately predict one's genetic risk for RDS.
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Affiliation(s)
- Kenneth Blum
- Department of Psychiatry, McKnight Brain Institute, University of Florida, Gainesville, FL, USA
| | - Mary Hauser
- Divisions of Addiction Services, Dominion Diagnostics,LLC, North Kingstown, RI, USA
| | - James Fratantonio
- Divisions of Applied Clinical Research & Education, Dominion Diagnostics, LLC, North Kingstown, RI, USA
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Hart AB, Kranzler HR. Alcohol Dependence Genetics: Lessons Learned From Genome-Wide Association Studies (GWAS) and Post-GWAS Analyses. Alcohol Clin Exp Res 2015; 39:1312-27. [PMID: 26110981 PMCID: PMC4515198 DOI: 10.1111/acer.12792] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 05/26/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND Alcohol dependence (AD) is a complex psychiatric disorder and a significant public health problem. Twin and family-based studies have consistently estimated its heritability to be approximately 50%, and many studies have sought to identify specific genetic variants associated with susceptibility to AD. These studies have been primarily linkage or candidate gene based and have been mostly unsuccessful in identifying replicable risk loci. Genome-wide association studies (GWAS) have improved the detection of specific loci associated with complex traits, including AD. However, findings from GWAS explain only a small proportion of phenotypic variance, and alternative methods have been proposed to investigate the associations that do not meet strict genome-wide significance criteria. METHODS This review summarizes all published AD GWAS and post-GWAS analyses that have sought to exploit GWAS data to identify AD-associated loci. RESULTS Findings from AD GWAS have been largely inconsistent, with the exception of variants encoding the alcohol-metabolizing enzymes. Analyses of GWAS data that go beyond standard association testing have demonstrated the polygenic nature of AD and the large contribution of common variants to risk, nominating novel genes and pathways for AD susceptibility. CONCLUSIONS Findings from AD GWAS and post-GWAS analyses have greatly increased our understanding of the genetic etiology of AD. However, it is clear that larger samples will be necessary to detect loci in addition to those that encode alcohol-metabolizing enzymes, which may only be possible through consortium-based efforts. Post-GWAS approaches to studying the genetic influences on AD are increasingly common and could greatly increase our knowledge of both the genetic architecture of AD and the specific genes and pathways that influence risk.
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Affiliation(s)
- Amy B. Hart
- Center for Studies of Addiction, Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104
| | - Henry R. Kranzler
- Center for Studies of Addiction, Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104
- VISN 4 MIRECC, Philadelphia VAMC, Philadelphia, PA 19104, USA
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Chitty KM, Lagopoulos J, Hickie IB, Hermens DF. Alcohol use in bipolar disorder: A neurobiological model to help predict susceptibility, select treatments and attenuate cortical insult. Neurosci Biobehav Rev 2015; 56:193-206. [PMID: 26192106 DOI: 10.1016/j.neubiorev.2015.07.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 06/12/2015] [Accepted: 07/09/2015] [Indexed: 02/06/2023]
Abstract
In a series of neurophysiological and neuroimaging studies we investigated the neurobiology related to alcohol use in young people with bipolar disorder. Impairments were identified across frontal and temporal representations of event-related potential and proton magnetic resonance spectroscopy markers; mismatch negativity and in vivo glutathione, respectively. We propose these findings reflect impairments in the N-methyl-D-aspartate receptor and antioxidant capacity. This review seeks to place these findings within the broader literature in the context of two propositions: 1. Pathophysiological impairments in N-methyl-D-aspartate receptor functioning in bipolar disorder contribute to susceptibility toward developing alcohol problems. 2. Alcohol aggravates bipolar disorder neuroprogression via oxidative stress. A neurobiological model that incorporates these propositions is presented, with a focus on the potential for N-methyl-D-aspartate receptor antagonism and glutathione augmentation as potential adjunctive pharmacotherapies to treat the comorbidity. While this review highlights the importance of alcohol monitoring and reduction strategies in the treatment of bipolar disorder, the clinical impact of the proposed model remains limited by the lack of controlled trials of novel pharmacological interventions.
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Affiliation(s)
- Kate M Chitty
- Clinical Research Unit, Brain and Mind Research Institute, University of Sydney, 94 Mallett Street, Camperdown, NSW 2050, Australia.
| | - Jim Lagopoulos
- Clinical Research Unit, Brain and Mind Research Institute, University of Sydney, 94 Mallett Street, Camperdown, NSW 2050, Australia.
| | - Ian B Hickie
- Clinical Research Unit, Brain and Mind Research Institute, University of Sydney, 94 Mallett Street, Camperdown, NSW 2050, Australia.
| | - Daniel F Hermens
- Clinical Research Unit, Brain and Mind Research Institute, University of Sydney, 94 Mallett Street, Camperdown, NSW 2050, Australia.
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The functional GRM3 Kozak sequence variant rs148754219 affects the risk of schizophrenia and alcohol dependence as well as bipolar disorder. Psychiatr Genet 2015; 24:277-8. [PMID: 25046171 PMCID: PMC4272221 DOI: 10.1097/ypg.0000000000000050] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Blum K, Thanos PK, Badgaiyan RD, Febo M, Oscar-Berman M, Fratantonio J, Demotrovics Z, Gold MS. Neurogenetics and gene therapy for reward deficiency syndrome: are we going to the Promised Land? Expert Opin Biol Ther 2015; 15:973-85. [PMID: 25974314 DOI: 10.1517/14712598.2015.1045871] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Addiction is a substantial health issue with limited treatment options approved by the FDA and as such currently available. The advent of neuroimaging techniques that link neurochemical and neurogenetic mechanisms to the reward circuitry brain function provides a framework for potential genomic-based therapies. AREAS COVERED Through candidate and genome-wide association studies approaches, many gene polymorphisms and clusters have been implicated in drug, food and behavioral dependence linked by the common rubric reward deficiency syndrome (RDS). The results of selective studies that include the role of epigenetics, noncoding micro RNAs in RDS behaviors especially drug abuse involving alcohol, opioids, cocaine, nicotine, pain and feeding are reviewed in this article. New targets for addiction treatment and relapse prevention, treatment alternatives such as gene therapy in animal models, and pharmacogenomics and nutrigenomics methods to manipulate transcription and gene expression are explored. EXPERT OPINION The recognition of the clinical benefit of early genetic testing to determine addiction risk stratification and dopaminergic agonistic, rather than antagonistic therapies are potentially the genomic-based wave of the future. In addition, further development, especially in gene transfer work and viral vector identification, could make gene therapy for RDS a possibility in the future.
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Affiliation(s)
- Kenneth Blum
- Department of Psychiatry & McKnight Brain Institute, University of Florida College of Medicine , Gainesville, FL , USA
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An α-synuclein gene (SNCA) polymorphism moderates the association of PTSD symptomatology with hazardous alcohol use, but not with aggression-related measures. J Anxiety Disord 2015; 30:41-7. [PMID: 25594371 PMCID: PMC4355301 DOI: 10.1016/j.janxdis.2014.12.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 11/30/2014] [Accepted: 12/15/2014] [Indexed: 01/25/2023]
Abstract
Posttraumatic stress disorder (PTSD) often precedes comorbid substance use disorder and has been associated with aggression. Prior research has evidenced that alcohol use and other externalizing behaviors share genetic factors with PTSD; however, few studies have examined if specific genes are associated with externalizing behaviors in PTSD. The purpose of the current study was to investigate whether an α-synuclein gene polymorphism (SNCA rs356195) moderates the association of PTSD symptomatology with externalizing behaviors. We examined the separate and combined effects of PTSD symptomatology and SNCA rs356195 on alcohol- and aggression-related measures in nonclinical participants (N=138 European Americans; 15 diagnosed with probable PTSD). Probable PTSD status and SNCA were both associated with externalizing measures. SNCA also moderated the association of PTSD symptomatology with hazardous alcohol use, but not with aggression-related measures. Current findings suggest that variations in SNCA may increase the likelihood that PTSD symptomatology results in excessive alcohol use.
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Transcriptional upregulation of myelin components in spontaneous myelin basic protein-deficient mice. Brain Res 2015; 1606:125-32. [PMID: 25708149 DOI: 10.1016/j.brainres.2015.02.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 02/10/2015] [Accepted: 02/12/2015] [Indexed: 11/21/2022]
Abstract
Myelin is essential for efficient signal transduction in the nervous system comprising of multiple proteins. The intricacies of the regulation of the formation of myelin, and its components, are not fully understood. Here, we describe the characterization of a novel myelin basic protein (Mbp) mutant mouse, mbp(jive), which spontaneously occurred in our mouse colony. These mice displayed the onset of a shaking gait before 3 weeks of age and seizure onset before 2 months of age. Due to a progressive increase of seizure intensity, mbp(jive) mice experienced premature lethality at around 3 months of age. Mbp mRNA transcript or protein was undetectable and, accordingly, genetic analysis demonstrated a homozygous loss of exons 3 to 6 of Mbp. Peripheral nerve conductance was mostly unimpaired. Additionally, we observed grave structural changes in white matter predominant structures were detected by T1, T2 and diffusion weighted magnetic resonance imaging. We additionally observed that Mbp-deficiency results in an upregulation of Qkl, Mag and Cnp, suggestive of a regulatory feedback mechanism whereby compensatory increases in Qkl have downstream effects on Mag and Cnp. Further research will clarify the role and specifications of this myelin feedback loop, as well as determine its potential role in therapeutic strategies for demyelinating disorders.
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A primate-specific functional GTTT-repeat in the core promoter of CYTH4 is linked to bipolar disorder in human. Prog Neuropsychopharmacol Biol Psychiatry 2015; 56:161-7. [PMID: 25240857 DOI: 10.1016/j.pnpbp.2014.09.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 09/10/2014] [Indexed: 12/20/2022]
Abstract
Evidence of primate-specific genes and gene regulatory mechanisms linked to bipolar disorder (BD) lend support to evolutionary/adaptive processes in the pathogenesis of this disorder. Following a genome-scale analysis of the entire protein coding genes annotated in the GeneCards database, we have recently reported that cytohesin-4 (CYTH4) contains the longest tetra-nucleotide short tandem repeat (STR) identified in a human protein-coding gene core promoter, which may be of adaptive advantage to this species. In the current study, we analyzed the evolutionary trend of this STR across evolution. We also analyzed the functional implication and distribution of this STR in a group of patients with type 1 BD (n=233) and controls (n=262). We found that this STR is exceptionally expanded in primates (Fisher exact p<0.00003). Association was observed between type I BD and the 6-repeat allele of this STR, (GTTT)₆ (Yates corrected Χ(2)=12.68, p<0.0001, OR: 1.68). This allele is the shortest length of the GTTT-repeat identified in the human subjects studied. Consistent with that finding, excess homozygosity was observed for the shorter alleles, (GTTT)₆ and (GTTT)₇, vs. the longer alleles, (GTTT)₈ and (GTTT)₉ in the BD group (Yates corrected Χ(2)=5.18, p<0.01, 1 df, OR: 1.96). Using Dual Glo luciferase system in HEK-293 cells, a trend for gene expression repression was observed from the 6- to the 9-repeat allele (p<0.003), and the GTTT-repeat significantly down-regulated gene expression, per se (p<0.0006). This is the first evidence of a link between a primate-specific STR and a major psychiatric disorder in human. It may be speculated that the CYTH4 GTTT-repeat in primates may have conferred selective advantage to this order, reflected in neural function and neurophenotypes. The role of the CYTH4 gene in the pathogenesis of type I BD remains to be clarified in the future studies.
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Blum K, Badgaiyan RD, Agan G, Fratantonio J, Simpatico T, Febo M, Haberstick BC, Smolen A, Gold MS. Molecular Genetic Testing in Reward Deficiency Syndrome (RDS): Facts and Fiction. ACTA ACUST UNITED AC 2015; 1:65-68. [PMID: 26052557 PMCID: PMC4455960 DOI: 10.17756/jrds.2015-009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Background The Brain Reward Cascade (BRC) is an interaction of neurotransmitters and their respective genes to control the amount of dopamine released within the brain. Any variations within this pathway, whether genetic or environmental (epigenetic), may result in addictive behaviors or RDS, which was coined to define addictive behaviors and their genetic components. Methods To carry out this review we searched a number of important databases including: Filtered: Cochrane Systematic reviews; DARE; Pubmed Central Clinical Quaries; National Guideline Clearinghouse and unfiltered resources: PsychINFO; ACP PIER; PsychSage; Pubmed/Medline. The major search terms included: dopamine agonist therapy for Addiction; dopamine agonist therapy for Reward dependence; dopamine antagonistic therapy for addiction; dopamine antagonistic therapy for reward dependence and neurogenetics of RDS. Results While there are many studies claiming a genetic association with RDS behavior, not all are scientifically accurate. Conclusion Albeit our bias, this Clinical Pearl discusses the facts and fictions behind molecular genetic testing in RDS and the significance behind the development of the Genetic Addiction Risk Score (GARSPREDX™), the first test to accurately predict one’s genetic risk for RDS.
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Affiliation(s)
- Kenneth Blum
- Department of Psychiatry, McKnight Brain Institute, University of Florida, Gainesville, FL, USA ; Department of Addiction Research & Therapy, Malibu Beach Recovery Center, Malibu Beach, CA, USA ; Divisions of Addiction Services, and Applied Clinical Research, Dominion Diagnostics, LLC, North Kingstown, RI, USA ; Department of Psychiatry, Human Integrated Services Unit University of Vermont Center for Clinical & Translational Science, College of Medicine, Burlington, VT, USA
| | - Rajendra D Badgaiyan
- Department of Psychiatry and Division of Neuroimaging, University of Minnesota College of Medicine, MN, USA
| | - Gozde Agan
- Divisions of Addiction Services, and Applied Clinical Research, Dominion Diagnostics, LLC, North Kingstown, RI, USA
| | - James Fratantonio
- Divisions of Addiction Services, and Applied Clinical Research, Dominion Diagnostics, LLC, North Kingstown, RI, USA
| | - Thomas Simpatico
- Department of Psychiatry, Human Integrated Services Unit University of Vermont Center for Clinical & Translational Science, College of Medicine, Burlington, VT, USA
| | - Marcelo Febo
- Department of Psychiatry, McKnight Brain Institute, University of Florida, Gainesville, FL, USA
| | - Brett C Haberstick
- Institute for Behavioral Genetics, University of Colorado Boulder, Boulder, CO, USA
| | - Andrew Smolen
- Institute for Behavioral Genetics, University of Colorado Boulder, Boulder, CO, USA
| | - Mark S Gold
- Departments of Psychiatry & Behavioral Sciences at the Keck, University of Southern California, School of Medicine, CA, USA ; Director of Research, Drug Enforcement Administration (DEA) Educational Foundation, Washington, D.C, USA
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Sivolap YP. [Maternal alcoholism and its impact on child health]. Zh Nevrol Psikhiatr Im S S Korsakova 2015; 115:133-136. [PMID: 27030835 DOI: 10.17116/jnevro2015115111133-136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Maternal alcoholism hinders the normal development of child and threatens his mental and physical health due to three factors: the hereditary transmission of predisposition to alcohol abuse; alcohol consumption during pregnancy; adverse family environment. The children of mothers suffering from alcoholism revealed are characterized by increased risk of depression, anxiety and other mental disorders, including alcohol and substance dependence. The adverse impact of maternal alcoholism (or, to speak more widely, parents' alcoholism) on the child health requires special preventive and treatment programs for both parents and children. Separation from the mother (even if the mother is addicted to alcohol) seriously injures the child, and therefore treatment programs for alcohol abusing women should be focused on the possible continuation of the parental rights of patients.
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Affiliation(s)
- Y P Sivolap
- Kafedra psihiatrii i narkologii Pervogo Moskovskogo gosudarstvennogo meditsinskogo universiteta im. I.M. Sechenova, Moskva, Rossija
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Pettorruso M, De Risio L, Di Nicola M, Martinotti G, Conte G, Janiri L. Allostasis as a conceptual framework linking bipolar disorder and addiction. Front Psychiatry 2014; 5:173. [PMID: 25520673 PMCID: PMC4253530 DOI: 10.3389/fpsyt.2014.00173] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 11/16/2014] [Indexed: 12/28/2022] Open
Abstract
Bipolar disorders (BDs) and addictions constitute reciprocal risk factors and are best considered under a unitary perspective. The concepts of allostasis and allostatic load (AL) may contribute to the understanding of the complex relationships between BD and addictive behaviors. Allostasis entails the safeguarding of reward function stability by recruitment of changes in the reward and stress system neurocircuitry and it may help to elucidate neurobiological underpinnings of vulnerability to addiction in BD patients. Conceptualizing BD as an illness involving the cumulative build-up of allostatic states, we hypothesize a progressive dysregulation of reward circuits clinically expressed as negative affective states (i.e., anhedonia). Such negative affective states may render BD patients more vulnerable to drug addiction, fostering a very rapid transition from occasional drug use to addiction, through mechanisms of negative reinforcement. The resulting addictive behavior-related ALs, in turn, may contribute to illness progression. This framework could have a heuristic value to enhance research on pathophysiology and treatment of BD and addiction comorbidity.
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Affiliation(s)
- Mauro Pettorruso
- Department of Neuroscience, Institute of Psychiatry and Clinical Psychology, Catholic University of Sacred Heart , Rome , Italy
| | - Luisa De Risio
- Department of Neuroscience, Institute of Psychiatry and Clinical Psychology, Catholic University of Sacred Heart , Rome , Italy
| | - Marco Di Nicola
- Department of Neuroscience, Institute of Psychiatry and Clinical Psychology, Catholic University of Sacred Heart , Rome , Italy
| | - Giovanni Martinotti
- Department of Neuroscience and Imaging, Institute of Psychiatry, "G. d'Annunzio" University of Chieti-Pescara , Chieti , Italy
| | - Gianluigi Conte
- Department of Neuroscience, Institute of Psychiatry and Clinical Psychology, Catholic University of Sacred Heart , Rome , Italy
| | - Luigi Janiri
- Department of Neuroscience, Institute of Psychiatry and Clinical Psychology, Catholic University of Sacred Heart , Rome , Italy
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