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Han M, Zeng D, Tan W, Chen X, Bai S, Wu Q, Chen Y, Wei Z, Mei Y, Zeng Y. Brain region-specific roles of brain-derived neurotrophic factor in social stress-induced depressive-like behavior. Neural Regen Res 2025; 20:159-173. [PMID: 38767484 PMCID: PMC11246125 DOI: 10.4103/nrr.nrr-d-23-01419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 01/19/2024] [Indexed: 05/22/2024] Open
Abstract
Brain-derived neurotrophic factor is a key factor in stress adaptation and avoidance of a social stress behavioral response. Recent studies have shown that brain-derived neurotrophic factor expression in stressed mice is brain region-specific, particularly involving the corticolimbic system, including the ventral tegmental area, nucleus accumbens, prefrontal cortex, amygdala, and hippocampus. Determining how brain-derived neurotrophic factor participates in stress processing in different brain regions will deepen our understanding of social stress psychopathology. In this review, we discuss the expression and regulation of brain-derived neurotrophic factor in stress-sensitive brain regions closely related to the pathophysiology of depression. We focused on associated molecular pathways and neural circuits, with special attention to the brain-derived neurotrophic factor-tropomyosin receptor kinase B signaling pathway and the ventral tegmental area-nucleus accumbens dopamine circuit. We determined that stress-induced alterations in brain-derived neurotrophic factor levels are likely related to the nature, severity, and duration of stress, especially in the above-mentioned brain regions of the corticolimbic system. Therefore, BDNF might be a biological indicator regulating stress-related processes in various brain regions.
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Affiliation(s)
- Man Han
- Brain Science and Advanced Technology Institute, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- Geriatric Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- School of Public Health, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
| | - Deyang Zeng
- Brain Science and Advanced Technology Institute, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- Geriatric Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- School of Public Health, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
| | - Wei Tan
- Geriatric Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei Province, China
| | - Xingxing Chen
- Brain Science and Advanced Technology Institute, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- Geriatric Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- School of Public Health, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
| | - Shuyuan Bai
- Brain Science and Advanced Technology Institute, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- Geriatric Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- School of Public Health, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
| | - Qiong Wu
- Brain Science and Advanced Technology Institute, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- Geriatric Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- School of Public Health, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
| | - Yushan Chen
- Brain Science and Advanced Technology Institute, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- Geriatric Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- School of Public Health, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
| | - Zhen Wei
- Brain Science and Advanced Technology Institute, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- Geriatric Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- School of Public Health, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
| | - Yufei Mei
- Brain Science and Advanced Technology Institute, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- Geriatric Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- School of Public Health, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
| | - Yan Zeng
- Brain Science and Advanced Technology Institute, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- Geriatric Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei Province, China
- School of Public Health, Wuhan University of Science and Technology, Wuhan, Hubei Province, China
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2
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Lei L, Wang YT, Hu D, Gai C, Zhang Y. Astroglial Connexin 43-Mediated Gap Junctions and Hemichannels: Potential Antidepressant Mechanisms and the Link to Neuroinflammation. Cell Mol Neurobiol 2023; 43:4023-4040. [PMID: 37875763 DOI: 10.1007/s10571-023-01426-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 10/14/2023] [Indexed: 10/26/2023]
Abstract
Major depression disorder (MDD) is a neuropsychiatric disorder associated with a high suicide rate and a higher disability rate than any other disease. Evidence suggests that the pathological mechanism of MDD is related to astrocyte dysfunction. Depression is mainly associated with the expression of connexin 43 (Cx43) and the function of Cx43-mediated gap junctions and hemichannels in astrocytes. Moreover, neuroinflammation has been a hotspot in research on the pathology of depression, and Cx43-mediated functions are thought to be involved in neuroinflammation-related depression. However, the specific mechanism of Cx43-mediated functions in neuroinflammation-related depression pathology remains unclear. Therefore, this review summarizes and discusses Cx43 expression, the role of gap junction intercellular communication, and its relationship with neuroinflammation in depression. This review also focuses on the effects of antidepressant drugs (e.g., monoamine antidepressants, psychotropic drugs, and N-methyl-D-aspartate receptor antagonists) on Cx43-mediated function and provides evidence for Cx43 as a novel target for the treatment of MDD. The pathogenesis of MDD is related to astrocyte dysfunction, with reduced Cx43 expression, GJ dysfunction, decreased GJIC and reduced BDNF expression in the depressed brain. The effect of Cx43 on neuroinflammation-related depression involving inflammatory cytokines, glutamate excitotoxicity, and HPA axis dysregulation. Antidepressant drugs targeting Cx43 can effectively relieve depressive symptoms.
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Affiliation(s)
- Lan Lei
- Department of Anatomy, School of Chinese Medicine, Beijing University of Chinese Medicine, Sunshine Southern Avenue, Fang-Shan District, Beijing, 102488, China
| | - Ya-Ting Wang
- Department of Anatomy, School of Chinese Medicine, Beijing University of Chinese Medicine, Sunshine Southern Avenue, Fang-Shan District, Beijing, 102488, China
| | - Die Hu
- Department of Anatomy, School of Chinese Medicine, Beijing University of Chinese Medicine, Sunshine Southern Avenue, Fang-Shan District, Beijing, 102488, China
| | - Cong Gai
- Department of Anatomy, School of Chinese Medicine, Beijing University of Chinese Medicine, Sunshine Southern Avenue, Fang-Shan District, Beijing, 102488, China
| | - Yi Zhang
- Department of Anatomy, School of Chinese Medicine, Beijing University of Chinese Medicine, Sunshine Southern Avenue, Fang-Shan District, Beijing, 102488, China.
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The Interaction Effect of Parental Rejection and Oxytocin Receptor Gene Polymorphism on Depression: A Cross-Cultural Study in Non-Clinical Samples. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19095566. [PMID: 35564961 PMCID: PMC9105151 DOI: 10.3390/ijerph19095566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/28/2022] [Accepted: 04/29/2022] [Indexed: 12/10/2022]
Abstract
Parental rejection has been consistently empirically implicated in a wide array of developmental, behavioural and psychological problems worldwide. However, the interaction effect between parental rejection in childhood and the oxytocin receptor genotype on psychological adjustment has yet to be investigated. The present study aimed to investigate gene–environment interaction effects between parental rejection (maternal and paternal) and oxytocin receptor (OXTR) gene polymorphisms (rs53576 and rs2254298) on depressive symptoms in adults in different cultural contexts. Adults from Italy and Japan (N = 133, age = 18–27 years, females = 68) were preliminarily genotyped and then completed the Parental Acceptance-Rejection Questionnaire for mothers and fathers and the Beck Depression Inventory. Hierarchical multiple regression analysis showed that paternal rejection was related to self-reported depression and that the effect of parental rejection was moderated by OXTR gene polymorphisms and nationality. Among Italians, OXTR rs2254298 A-carriers showed resilience to negative early parental care, whereas among Japanese, OXTR rs53576 non-A-carriers showed resistance to negative early paternal care. These findings align with expected relations between perceived acceptance–rejection and an individual’s psychological adjustment, as proposed by interpersonal acceptance–rejection theory, and indicate the need for future studies adopting a multicultural and multilevel approach to better understand how the effects of parental rejection extend into adulthood.
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El-Sayed A, Aleya L, Kamel M. The link among microbiota, epigenetics, and disease development. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:28926-28964. [PMID: 33860421 DOI: 10.1007/s11356-021-13862-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 04/06/2021] [Indexed: 06/12/2023]
Abstract
The microbiome is a community of various microorganisms that inhabit or live on the skin of humans/animals, sharing the body space with their hosts. It is a sort of complex ecosystem of trillions of commensals, symbiotic, and pathogenic microorganisms, including trillions of bacteria, archaea, protozoa, fungi, and viruses. The microbiota plays a role in the health and disease status of the host. Their number, species dominance, and viability are dynamic. Their long-term disturbance is usually accompanied by serious diseases such as metabolic disorders, cardiovascular diseases, or even cancer. While epigenetics is a term that refers to different stimuli that induce modifications in gene expression patterns without structural changes in the inherited DNA sequence, these changes can be reversible or even persist for several generations. Epigenetics can be described as cell memory that stores experience against internal and external factors. Results from multiple institutions have contributed to the role and close interaction of both microbiota and epigenetics in disease induction. Understanding the mechanisms of both players enables a better understanding of disease induction and development and also opens the horizon to revolutionary therapeutic approaches. The present review illustrates the roles of diet, microbiome, and epigenetics in the induction of several chronic diseases. In addition, it discusses the application of epigenetic data to develop diagnostic biomarkers and therapeutics and evaluate their safety for patients. Understanding the interaction among all these elements enables the development of innovative preventive/therapeutic approaches for disease control.
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Affiliation(s)
- Amr El-Sayed
- Department of Medicine and Infectious Diseases, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Lotfi Aleya
- Chrono-Environnement Laboratory, UMR CNRS 6249, Bourgogne Franche-Comté University, F-25030, Besançon Cedex, France
| | - Mohamed Kamel
- Department of Medicine and Infectious Diseases, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt.
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Ershadi ASB, Amini-Khoei H, Hosseini MJ, Dehpour AR. SAHA Improves Depressive Symptoms, Cognitive Impairment and Oxidative Stress: Rise of a New Antidepressant Class. Neurochem Res 2021; 46:1252-1263. [PMID: 33576938 DOI: 10.1007/s11064-021-03263-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 12/30/2020] [Accepted: 01/30/2021] [Indexed: 12/28/2022]
Abstract
Depression is a disabling psychiatric disorder affecting millions of people all around the world. Under current therapeutic choices, a portion of patients are not responsive, have relapses, or experience cognitive side effects. Hence, the present study aimed to find other antidepressant compounds lacking the mentioned deficiency. Since epigenetic regulations have attracted more attention in etiology of depression, histone deacetylase (HDAC) inhibitors have gained more importance due to their possible antidepressant activity. We selected a promising member of HDAC inhibitors named suberanilohydroxamic acid (SAHA) to evaluate its antidepressant properties. Early life stress disarrays many neurodevelopmental factors and consequently, leads to the destruction of hippocampus and prefrontal cortex synapses as areas highly related to emotion and memory so that any destruction on them can cause lasting impairments. For that reason, we used maternal separation (MS) paradigm to investigate depression in male mice. To compare the efficacy of SAHA with current treatment options, we also treated a group of MS mice with fluoxetine (FLX) as first-line pharmacological drugs of depression. The results demonstrated that depressive-like behavior, cognitive function and inflammatory response of MS mice were attenuated with SAHA. Our data showed that, besides anti-depressant and cognition-boosting effects similar to FLX, SAHA counteracted inflammatory response caused by depression and reversed the coenzyme Q10 (CoQ10) level in hippocampus. SAHA's effect on alleviating depressive behavior was accompanied with memory enhancement and hippocampus biochemical tests. These findings may propose SAHA as another therapeutic option for depressive symptoms, especially with comorbid cognitive impairment.
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Affiliation(s)
- Amir Sasan Bayani Ershadi
- Zanjan Applied Pharmacology Research Center, Zanjan University of Medical Sciences, Zanjan, Iran.,Departments of Pharmacology and Toxicology, School of Pharmacy, Zanjan University of Medical Sciences, P. O. Box: 45139-56184, Zanjan, Iran
| | - Hossein Amini-Khoei
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, P. O. Box: 88138-33435, Shahrekord, Iran
| | - Mir-Jamal Hosseini
- Zanjan Applied Pharmacology Research Center, Zanjan University of Medical Sciences, Zanjan, Iran. .,Departments of Pharmacology and Toxicology, School of Pharmacy, Zanjan University of Medical Sciences, P. O. Box: 45139-56184, Zanjan, Iran.
| | - Ahmad Reza Dehpour
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran. .,Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, P.O. Box: 13145-784, Tehran, Iran.
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6
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Dong E, Pandey SC. Prenatal stress induced chromatin remodeling and risk of psychopathology in adulthood. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2020; 156:185-215. [PMID: 33461663 PMCID: PMC7864549 DOI: 10.1016/bs.irn.2020.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
New insights into the pathophysiology of psychiatric disorders suggest the existence of a complex interplay between genetics and environment. This notion is supported by evidence suggesting that exposure to stress during pregnancy exerts profound effects on the neurodevelopment and behavior of the offspring and predisposes them to psychiatric disorders later in life. Accumulated evidence suggests that vulnerability to psychiatric disorders may result from permanent negative effects of long-term changes in synaptic plasticity due to altered epigenetic mechanisms (histone modifications and DNA methylation) that lead to condensed chromatin architecture, thereby decreasing the expression of candidate genes during early brain development. In this chapter, we have summarized the literature of clinical studies on psychiatric disorders induced by maternal stress during pregnancy. We also discussed the epigenetic alterations of gene regulations induced by prenatal stress. Because the clinical manifestations of psychiatric disorders are complex, it is obvious that the biological progression of these diseases cannot be studied only in postmortem brains of patients and the use of animal models is required. Therefore, in this chapter, we have introduced a well-established mouse model of prenatal stress (PRS) generated in restrained pregnant dams. The behavioral phenotypes of the offspring (PRS mice) born to the stressed dam and underlying epigenetic changes in key molecules related to synaptic activity were described and highlighted. PRS mice may serve as a useful model for investigating the pathogenesis of psychiatric disorders and may be a useful tool for screening for the potential compounds that may normalize aberrant epigenetic mechanisms induced by prenatal stress.
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Affiliation(s)
- Erbo Dong
- Center for Alcohol Research in Epigenetics, Department of Psychiatry, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States.
| | - Subhash C Pandey
- Center for Alcohol Research in Epigenetics, Department of Psychiatry, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States; Jesse Brown VA Medical Center, Chicago, IL, United States
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8
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Hayes C, Palmer V, Hamilton B, Simons C, Hopwood M. What nonpharmacological therapeutic interventions are provided to adolescents admitted to general mental health inpatient units? A descriptive review. Int J Ment Health Nurs 2019; 28:671-686. [PMID: 30756470 DOI: 10.1111/inm.12575] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/02/2019] [Indexed: 01/23/2023]
Abstract
Limited research exists regarding the therapeutic operations of adolescent mental health inpatient units, particularly in terms of nonpharmacological therapeutic interventions. This review collates what is known about reported nonpharmacological therapeutic interventions for young people admitted to general or non-disorder-specific adolescent mental health inpatient settings. A descriptive review of this nature was not located in the literature. The aim was to identify what is currently known about reported nonpharmacological therapeutic interventions. The purpose was to consider gaps and contribute to further work being undertaken in describing an exemplary inpatient model of care for adolescents. Sources included CINAHL, MEDLINE, ERIC, EMBASE, and PsycINFO. Studies included were those published in English, between the years 2000 and 2018. Exclusions included residential, community, outpatient, forensic settings, and studies detailing pharmacological interventions. Ten studies were identified. This descriptive review provides an objective foundation to inform an exemplary inpatient model of care currently being investigated. There is a critical need to understand these interventions to identify key components of an inpatient model of care. Such knowledge will provide guidance for future services seeking to create an exemplary model of care. Furthermore, these results can influence current practice by improving quality and delivery of inpatient care.
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Affiliation(s)
- Claire Hayes
- Department of Psychiatry, Melbourne, Vic., Australia.,The Albert Road Clinic, Melbourne, Melbourne, Vic., Australia
| | | | - Bridget Hamilton
- Centre for Psychiatric Nursing, University of Melbourne, Melbourne, Vic., Australia
| | - Christine Simons
- Department of Psychiatry, Melbourne, Vic., Australia.,The Albert Road Clinic, Melbourne, Melbourne, Vic., Australia
| | - Malcolm Hopwood
- Department of Psychiatry, Melbourne, Vic., Australia.,The Albert Road Clinic, Melbourne, Melbourne, Vic., Australia
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9
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Humo M, Lu H, Yalcin I. The molecular neurobiology of chronic pain-induced depression. Cell Tissue Res 2019; 377:21-43. [PMID: 30778732 DOI: 10.1007/s00441-019-03003-z] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 02/01/2019] [Indexed: 12/18/2022]
Abstract
The increasing number of individuals with comorbidities poses an urgent need to improve the management of patients with multiple co-existing diseases. Among these comorbidities, chronic pain and mood disorders, two long-lasting disabling conditions that significantly reduce the quality of life, could be cited first. The recent development of animal models accelerated the studies focusing on the underlying mechanisms of the chronic pain and depression/anxiety comorbidity. This review provides an overview of clinical and pre-clinical studies performed over the past two decades addressing the molecular aspects of the comorbid relationship of chronic pain and depression. We thus focused on the studies that investigated the molecular characteristics of the comorbid relationship between chronic pain and mood disorders, especially major depressive disorders, from the genetic and epigenetic point of view to key neuromodulators which have been shown to play an important role in this comorbidity.
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Affiliation(s)
- Muris Humo
- Institut des Neurosciences Cellulaires et Intégratives, Centre National de la Recherche Scientifique et Université de Strasbourg, 67000, Strasbourg, France
| | - Han Lu
- Institut des Neurosciences Cellulaires et Intégratives, Centre National de la Recherche Scientifique et Université de Strasbourg, 67000, Strasbourg, France.,Faculty of Biology and Bernstein Center Freiburg, University of Freiburg, D-79104, Freiburg, Germany
| | - Ipek Yalcin
- Institut des Neurosciences Cellulaires et Intégratives, Centre National de la Recherche Scientifique et Université de Strasbourg, 67000, Strasbourg, France.
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10
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Kraaijenvanger EJ, He Y, Spencer H, Smith AK, Bos PA, Boks MP. Epigenetic variability in the human oxytocin receptor (OXTR) gene: A possible pathway from early life experiences to psychopathologies. Neurosci Biobehav Rev 2019; 96:127-142. [DOI: 10.1016/j.neubiorev.2018.11.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 11/23/2018] [Accepted: 11/24/2018] [Indexed: 02/09/2023]
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11
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Does the Stress of Laboratory Life and Experimentation on Animals Adversely Affect Research Data? A Critical Review. Altern Lab Anim 2018; 46:291-305. [DOI: 10.1177/026119291804600501] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Recurrent acute and/or chronic stress can affect all vertebrate species, and can have serious consequences. It is increasingly and widely appreciated that laboratory animals experience significant and repeated stress, which is unavoidable and is caused by many aspects of laboratory life, such as captivity, transport, noise, handling, restraint and other procedures, as well as the experimental procedures applied to them. Such stress is difficult to mitigate, and lack of significant desensitisation/habituation can result in considerable psychological and physiological welfare problems, which are mediated by the activation of various neuroendocrine networks that have numerous and pervasive effects. Psychological damage can be reflected in stereotypical behaviours, including repetitive pacing and circling, and even self-harm. Physical consequences include adverse effects on immune function, inflammatory responses, metabolism, and disease susceptibility and progression. Further, some of these effects are epigenetic, and are therefore potentially transgenerational: the biology of animals whose parents/grandparents were wild-caught and/or have experienced chronic stress in laboratories could be altered, as compared to free-living individuals. It is argued that these effects must have consequences for the reliability of experimental data and their extrapolation to humans, and this may not be recognised sufficiently among those who use animals in experiments.
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12
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Cataldo I, Azhari A, Lepri B, Esposito G. Oxytocin receptors (OXTR) and early parental care: An interaction that modulates psychiatric disorders. RESEARCH IN DEVELOPMENTAL DISABILITIES 2018; 82:27-38. [PMID: 29033100 DOI: 10.1016/j.ridd.2017.10.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 09/21/2017] [Accepted: 10/05/2017] [Indexed: 05/12/2023]
Abstract
Oxytocin plays an important role in the modulation of social behavior in both typical and atypical contexts. Also, the quality of early parental care sets the foundation for long-term psychosocial development. Here, we review studies that investigated how oxytocin receptor (OXTR) interacts with early parental care experiences to influence the development of psychiatric disorders. Using Pubmed, Scopus and PsycInfo databases, we utilized the keyword "OXTR" before subsequently searching for specific OXTR single nucleotide polymorphisms (SNPs), generating a list of 598 studies in total. The papers were catalogued in a database and filtered for gene-environment interaction, psychiatric disorders and involvement of parental care. In particular, rs53576 and rs2254298 were found to be significantly involved in gene-environment interactions that modulated risk for psychopathology and the following psychiatric disorders: disruptive behavior, depression, anxiety, eating disorder and borderline personality disorder. These results illustrate the importance of OXTR in mediating the impact of parental care on the emergence of psychopathology.
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Affiliation(s)
- Ilaria Cataldo
- Department of Psychology and Cognitive Science, University of Trento, Italy; Mobile and Social Computing Lab, Fondazione Bruno Kessler, Trento, Italy
| | - Atiqah Azhari
- Division of Psychology, School of Social Sciences, Nanyang Technological University, Singapore
| | - Bruno Lepri
- Mobile and Social Computing Lab, Fondazione Bruno Kessler, Trento, Italy
| | - Gianluca Esposito
- Department of Psychology and Cognitive Science, University of Trento, Italy; Division of Psychology, School of Social Sciences, Nanyang Technological University, Singapore.
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14
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Abstract
PURPOSE OF REVIEW We review the existing literature on gene-environment interactions (G×E) and epigenetic changes primarily in borderline personality disorder (BPD) but also in antisocial, schizotypal, and avoidant personality disorders. RECENT FINDINGS Research supports that susceptibility genes to BPD or its underlying traits may be expressed under certain environmental conditions such as physical or childhood sexual abuse. Epigenetic modifications of neurodevelopment- and stress-related genes are suggested to underlie the relationship between early life adversary and borderline personality disorder. Only limited studies have investigated the role of gene-environment interactions and epigenetic changes in the genesis of antisocial, schizotypal, and avoidant personality disorders. Considering the lack of pharmacological treatment for most personality disorders, the emerging evidence on the critical role of G×E and epigenetic changes in the genesis of personality disorders could help develop more biologically oriented therapeutic approaches. Future studies should explore the potential of this new therapeutic dimension.
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15
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Zaletel I, Filipović D, Puškaš N. Hippocampal BDNF in physiological conditions and social isolation. Rev Neurosci 2017; 28:675-692. [DOI: 10.1515/revneuro-2016-0072] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Accepted: 02/16/2017] [Indexed: 12/19/2022]
Abstract
AbstractExposure of an organism to chronic psychosocial stress may affect brain-derived neurotrophic factor (BDNF) expression that has been implicated in the etiology of psychiatric disorders, such as depression. Given that depression in humans has been linked with social stress, the chronic social stress paradigms for modeling psychiatric disorders in animals have thus been developed. Chronic social isolation in animal models generally causes changes in hypothalamic-pituitary-adrenal axis functioning, associated with anxiety- and depressive-like behaviors. Also, this chronic stress causes downregulation of BDNF protein and mRNA in the hippocampus, a stress-sensitive brain region closely related to the pathophysiology of depression. In this review, we discuss the current knowledge regarding the structure, function, intracellular signaling, inter-individual differences and epigenetic regulation of BDNF in both physiological conditions and depression and changes in corticosterone levels, as a marker of stress response. Since BDNF levels are age dependent in humans and rodents, this review will also highlight the effects of adolescent and adult chronic social isolation models of both genders on the BDNF expression.
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Affiliation(s)
- Ivan Zaletel
- Institute of Histology and Embryology “Aleksandar Ð. Kostić”, School of Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | - Dragana Filipović
- Laboratory of Molecular Biology and Endocrinology, Institute of Nuclear Sciences “Vinča”, University of Belgrade, 11000 Belgrade, Serbia
| | - Nela Puškaš
- Institute of Histology and Embryology “Aleksandar Ð. Kostić”, School of Medicine, University of Belgrade, Višegradska 26, 11000 Belgrade, Serbia
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16
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Naik AA, Patro N, Seth P, Patro IK. Intra-generational protein malnutrition impairs temporal astrogenesis in rat brain. Biol Open 2017; 6:931-942. [PMID: 28546341 PMCID: PMC5550907 DOI: 10.1242/bio.023432] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The lack of information on astrogenesis following stressor effect, notwithstanding the imperative roles of astroglia in normal physiology and pathophysiology, incited us to assess temporal astrogenesis and astrocyte density in an intra-generational protein malnutrition (PMN) rat model. Standard immunohistochemical procedures for glial lineage markers and their intensity measurements, and qRT-PCR studies, were performed to reveal the spatio-temporal origin and density of astrocytes. Reduced A2B5+ glia restricted precursor population in ventricles and caused poor dissemination to cortex at embryonic days (E)11-14, and low BLBP+ secondary radial glia in the subventricular zone (SVZ) of E16 low protein (LP) brains reflect compromised progenitor pooling. Contrary to large-sized BLBP+ gliospheres in high protein (HP) brains at E16, small gliospheres and discrete BLBP+ cells in LP brains evidence loss of colonization and low proliferative potential. Delayed emergence of GFAP expression, precocious astrocyte maturation and significantly reduced astrocyte number suggest impaired temporal and compromised astrogenesis within LP-F1 brains. Our findings of protein deprivation induced impairments in temporal astrogenesis, compromised density and astrocytic dysfunction, strengthen the hypothesis of astrocytes as possible drivers of neurodevelopmental disorders. This study may increase our understanding of stressor-associated brain development, opening up windows for effective therapeutic interventions against debilitating neurodevelopmental disorders. Summary: Maternal protein deprivation results in low progenitor pooling, and delayed and compromised astrogenesis, suggesting astrocyte impairment as a driver of neurological diseases owing to their imperative roles in normal and pathological situations.
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Affiliation(s)
- Aijaz Ahmad Naik
- School of Studies in Neuroscience, Jiwaji University, Gwalior 474011, India.,School of Studies in Zoology, Jiwaji University, Gwalior 474011, India
| | - Nisha Patro
- School of Studies in Neuroscience, Jiwaji University, Gwalior 474011, India
| | - Pankaj Seth
- National Brain Research Centre, Manesar, Haryana 122051, India
| | - Ishan K Patro
- School of Studies in Neuroscience, Jiwaji University, Gwalior 474011, India .,School of Studies in Zoology, Jiwaji University, Gwalior 474011, India
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17
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Tajbakhsh A, Mokhtari-Zaer A, Rezaee M, Afzaljavan F, Rivandi M, Hassanian SM, Ferns GA, Pasdar A, Avan A. Therapeutic Potentials of BDNF/TrkB in Breast Cancer; Current Status and Perspectives. J Cell Biochem 2017; 118:2502-2515. [PMID: 28230291 DOI: 10.1002/jcb.25943] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 02/21/2017] [Indexed: 12/14/2022]
Abstract
Brain-derived neurotrophic factor (BDNF) is a potent neurotrophic factor that has been shown to stimulate breast cancer cell growth and metastasis via tyrosine kinase receptors TrkA, TrkB, and the p75NTR death receptor. The aberrant activation of BDNF/TrkB pathways can modulate several signaling pathways, including Akt/PI3K, Jak/STAT, NF-kB, UPAR/UPA, Wnt/β-catenin, and VEGF pathways as well as the ER receptor. Several microRNAs have been identified that are involved in the modulation of BDNF/TrkB pathways. These include miR-206, miR-204, MiR-200a/c, MiR-210, MiR-134, and MiR-191; and these may be of value as prognostic and predictive biomarkers for detecting patients at high risk of developing breast cancer. It has been also been demonstrated that a high expression of genes involved in the BDNF pathway in breast cancer is associated with poor clinical outcome and reduced survival of patients. Several approaches have been developed for targeting this pathway, for example TKr inhibitors (AZD6918, CEP-701) and RNA interference. The aim of the current review was to provide an overview of the role of BDNF/TrkB pathways in the pathogenesis of breast cancer and its value as a potential therapeutic target. J. Cell. Biochem. 118: 2502-2515, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Amir Tajbakhsh
- Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amin Mokhtari-Zaer
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Neurogenic Inflammation Research Centre and Department of Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mehdi Rezaee
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Medical Biotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fahimeh Afzaljavan
- Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mehdi Rivandi
- Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Mahdi Hassanian
- Department of Medical Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Metabolic Syndrome Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Gordon A Ferns
- Brighton & Sussex Medical School, Division of Medical Education, Falmer, Brighton, UK
| | - Alireza Pasdar
- Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Division of Applied Medicine, Medical School, University of Aberdeen, Foresterhill, Aberdeen, UK.,Medical Genetics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amir Avan
- Metabolic Syndrome Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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18
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Matosin N, Cruceanu C, Binder EB. Preclinical and Clinical Evidence of DNA Methylation Changes in Response to Trauma and Chronic Stress. CHRONIC STRESS (THOUSAND OAKS, CALIF.) 2017; 1:2470547017710764. [PMID: 29503977 PMCID: PMC5831952 DOI: 10.1177/2470547017710764] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 05/01/2017] [Indexed: 12/13/2022]
Abstract
Exposure to chronic stress, either repeated severe acute or moderate sustained stress, is one of the strongest risk factors for the development of psychopathologies such as post-traumatic stress disorder and depression. Chronic stress is linked with several lasting biological consequences, particularly to the stress endocrine system but also affecting intermediate phenotypes such as brain structure and function, immune function, and behavior. Although genetic predisposition confers a proportion of the risk, the most relevant molecular mechanisms determining those susceptible and resilient to the effects of stress and trauma may be epigenetic. Epigenetics refers to the mechanisms that regulate genomic information by dynamically changing the patterns of transcription and translation of genes. Mounting evidence from preclinical rodent and clinical population studies strongly support that epigenetic modifications can occur in response to traumatic and chronic stress. Here, we discuss this literature examining stress-induced epigenetic changes in preclinical models and clinical cohorts of stress and trauma occurring early in life or in adulthood. We highlight that a complex relationship between the timing of environmental stressors and genetic predispositions likely mediate the response to chronic stress over time, and that a better understanding of epigenetic changes is needed by further investigations in longitudinal and postmortem brain clinical cohorts.
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Affiliation(s)
- Natalie Matosin
- Department of Translational Research in
Psychiatry, Max-Planck Institute of Psychiatry, Munich, Germany
- School of Psychiatry, Faculty of Medicine,
University of New South Wales, Sydney, Australia
| | - Cristiana Cruceanu
- Department of Translational Research in
Psychiatry, Max-Planck Institute of Psychiatry, Munich, Germany
| | - Elisabeth B. Binder
- Department of Translational Research in
Psychiatry, Max-Planck Institute of Psychiatry, Munich, Germany
- Department of Psychiatry and Behavioral
Sciences, Emory University School of Medicine, Atlanta, USA
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19
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Padayachey U, Ramlall S, Chipps J. Depression in older adults: prevalence and risk factors in a primary health care sample. S Afr Fam Pract (2004) 2017. [DOI: 10.1080/20786190.2016.1272250] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- U Padayachey
- Department of Psychiatry, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - S Ramlall
- Department of Psychiatry, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - J Chipps
- Faculty of Community Health, University of the Western Cape, Cape Town, South Africa
- Honorary, Sydney School of Nursing, University of Sydney, Sydney, Australia
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20
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HDAC Inhibitors as Epigenetic Regulators of the Immune System: Impacts on Cancer Therapy and Inflammatory Diseases. BIOMED RESEARCH INTERNATIONAL 2016; 2016:8797206. [PMID: 27556043 PMCID: PMC4983322 DOI: 10.1155/2016/8797206] [Citation(s) in RCA: 202] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 06/08/2016] [Accepted: 06/29/2016] [Indexed: 01/13/2023]
Abstract
Histone deacetylase (HDAC) inhibitors are powerful epigenetic regulators that have enormous therapeutic potential and have pleiotropic effects at the cellular and systemic levels. To date, HDAC inhibitors are used clinically for a wide variety of disorders ranging from hematopoietic malignancies to psychiatric disorders, are known to have anti-inflammatory properties, and are in clinical trials for several other diseases. In addition to influencing gene expression, HDAC enzymes also function as part of large, multisubunit complexes which have many nonhistone targets, alter signaling at the cellular and systemic levels, and result in divergent and cell-type specific effects. Thus, the effects of HDAC inhibitor treatment are too intricate to completely understand with current knowledge but the ability of HDAC inhibitors to modulate the immune system presents intriguing therapeutic possibilities. This review will explore the complexity of HDAC inhibitor treatment at the cellular and systemic levels and suggest strategies for effective use of HDAC inhibitors in biomedical research, focusing on the ability of HDAC inhibitors to modulate the immune system. The possibility of combining the documented anticancer effects and newly emerging immunomodulatory effects of HDAC inhibitors represents a promising new combinatorial therapeutic approach for HDAC inhibitor treatments.
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21
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Malki K, Koritskaya E, Harris F, Bryson K, Herbster M, Tosto MG. Epigenetic differences in monozygotic twins discordant for major depressive disorder. Transl Psychiatry 2016; 6:e839. [PMID: 27300265 PMCID: PMC4931599 DOI: 10.1038/tp.2016.101] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 04/05/2016] [Accepted: 04/20/2016] [Indexed: 12/22/2022] Open
Abstract
Although monozygotic (MZ) twins share the majority of their genetic makeup, they can be phenotypically discordant on several traits and diseases. DNA methylation is an epigenetic mechanism that can be influenced by genetic, environmental and stochastic events and may have an important impact on individual variability. In this study we explored epigenetic differences in peripheral blood samples in three MZ twin studies on major depressive disorder (MDD). Epigenetic data for twin pairs were collected as part of a previous study using 8.1-K-CpG microarrays tagging DNA modification in white blood cells from MZ twins discordant for MDD. Data originated from three geographical regions: UK, Australia and the Netherlands. Ninety-seven MZ pairs (194 individuals) discordant for MDD were included. Different methods to address non independently-and-identically distributed (non-i.i.d.) data were evaluated. Machine-learning methods with feature selection centered on support vector machine and random forest were used to build a classifier to predict cases and controls based on epivariations. The most informative variants were mapped to genes and carried forward for network analysis. A mixture approach using principal component analysis (PCA) and Bayes methods allowed to combine the three studies and to leverage the increased predictive power provided by the larger sample. A machine-learning algorithm with feature reduction classified affected from non-affected twins above chance levels in an independent training-testing design. Network analysis revealed gene networks centered on the PPAR-γ (NR1C3) and C-MYC gene hubs interacting through the AP-1 (c-Jun) transcription factor. PPAR-γ (NR1C3) is a drug target for pioglitazone, which has been shown to reduce depression symptoms in patients with MDD. Using a data-driven approach we were able to overcome challenges of non-i.i.d. data when combining epigenetic studies from MZ twins discordant for MDD. Individually, the studies yielded negative results but when combined classification of the disease state from blood epigenome alone was possible. Network analysis revealed genes and gene networks that support the inflammation hypothesis of MDD.
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Affiliation(s)
- K Malki
- King's College London, MRC Social, Genetic and Developmental Psychiatry Centre at the Institute of Psychiatry, Psychology and Neuroscience, London, UK,King's College London, MRC Social, Genetic and Developmental Psychiatry Centre at the Institute of Psychiatry, Psychology and Neuroscience, SGDP Research Centre (PO80), De Crespigny Park, Denmark Hill, London SE5 8AF, UK. E-mail:
| | - E Koritskaya
- Department of Computer Science, University College London, London, UK
| | - F Harris
- King's College London, MRC Social, Genetic and Developmental Psychiatry Centre at the Institute of Psychiatry, Psychology and Neuroscience, London, UK
| | - K Bryson
- Department of Computer Science, University College London, London, UK
| | - M Herbster
- Department of Computer Science, University College London, London, UK
| | - M G Tosto
- King's College London, MRC Social, Genetic and Developmental Psychiatry Centre at the Institute of Psychiatry, Psychology and Neuroscience, London, UK,Laboratory for Cognitive Investigations and Behavioural Genetics Tomsk State University, Tomsk, Russia
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22
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Fisher PA, Beauchamp KG, Roos LE, Noll LK, Flannery J, Delker BC. The Neurobiology of Intervention and Prevention in Early Adversity. Annu Rev Clin Psychol 2016; 12:331-57. [DOI: 10.1146/annurev-clinpsy-032814-112855] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Philip A. Fisher
- Department of Psychology, University of Oregon, Eugene, Oregon 97403;
| | - Kate G. Beauchamp
- Department of Psychology, University of Oregon, Eugene, Oregon 97403;
| | - Leslie E. Roos
- Department of Psychology, University of Oregon, Eugene, Oregon 97403;
| | - Laura K. Noll
- Department of Psychology, University of Oregon, Eugene, Oregon 97403;
| | - Jessica Flannery
- Department of Psychology, University of Oregon, Eugene, Oregon 97403;
| | - Brianna C. Delker
- Department of Psychology, University of Oregon, Eugene, Oregon 97403;
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23
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Kang HJ, Kim JM, Kim SY, Kim SW, Shin IS, Kim HR, Park MH, Shin MG, Yoon JH, Yoon JS. A Longitudinal Study of BDNF Promoter Methylation and Depression in Breast Cancer. Psychiatry Investig 2015; 12:523-31. [PMID: 26508964 PMCID: PMC4620310 DOI: 10.4306/pi.2015.12.4.523] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 12/02/2014] [Accepted: 11/02/2014] [Indexed: 01/19/2023] Open
Abstract
OBJECTIVE Brain-derived neurotrophic factor (BDNF) is investigated in depression related to medical disorders and its secretion is influenced by epigenetic factors. We investigated the association between BDNF promoter methylation and depression following mastectomy for breast cancer. METHODS In total, 309 patients with breast cancer were evaluated 1 week after mastectomy, and 244 (79%) were followed up 1 year later. Depression was diagnosed (major or minor depressive disorder) according to DSM-IV criteria and depression severity was estimated by Montgomery-Asberg Depression Rating Scale (MADRS). We assessed BDNF promoter methylation using leukocyte DNA. The effects of BDNF methylation on depression diagnosis and severity were investigated using multivariate logistic and linear regression models, respectively. The two-way interaction between BDNF methylation and the val66met polymorphism on depression was also evaluated using multivariate logistic regression models. RESULTS Higher BDNF methylation was independently associated with depression diagnosis and with more severe symptoms at both 1 week and 1 year after mastectomy. No significant methylation-genotype interactions were found. CONCLUSION A role for BDNF in depression related to breast cancer was supported. Indeed, the association between depression and BDNF methylation may be useful for identifying patients who are at high risk for depression and for suggesting directions for promising drug research.
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Affiliation(s)
- Hee-Ju Kang
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Jae-Min Kim
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Seon-Young Kim
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Sung-Wan Kim
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Il-Seon Shin
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Hye-Ran Kim
- Brain Korea 21 Project, Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Min-Ho Park
- Breast and Endocrine Tumor Clinic, Chonnam National University Hwasun Hospital, Hwasun, Republic of Korea
| | - Myung-Geun Shin
- Department of Laboratory Medicine, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Jung-Han Yoon
- Breast and Endocrine Tumor Clinic, Chonnam National University Hwasun Hospital, Hwasun, Republic of Korea
| | - Jin-Sang Yoon
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
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24
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Jing LL, Zhu XX, Lv ZP, Sun XG. Effect of Xiaoyaosan on major depressive disorder. Chin Med 2015; 10:18. [PMID: 26191079 PMCID: PMC4506593 DOI: 10.1186/s13020-015-0050-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 07/01/2015] [Indexed: 12/21/2022] Open
Abstract
Background This study aims to evaluate the efficacy of Xiaoyaosan (XYS) for treatment of major depressive disorder (MDD) and to review the studies on antidepressant mechanisms of XYS. Methods The China Knowledge Resource Integrated Database (1998–2014), VIP Journal Integration Platform (1989–2009), and PubMed (1950–2014) were used to search for and collect scientific publications related to XYS and MDD. Clinical trials for “MDD” and “xiaoyao” were screened. Papers that used the original prescription of XYS for treatment and in combination with Western medicines were included, while papers describing modified XYS were excluded. Four investigators read and screened the resulting publications independently, evaluated the associated scientific results and evidence. Results There were no conclusive results to support the efficacy of XYS for treatment of MDD, owing to limited sample sizes, flaws in blinding and randomization, and lack of multi-centered clinical trials. Among the experimental studies on the effects of XYS possible involvement of 5-hydroxytryptamine, hypothalamic–pituitary–adrenal axis function, and neuroinflammation were possibly involved demonstrated. Conclusions The effectiveness of XYS for treatment of MDD is uncertain.
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Affiliation(s)
- Lin-Lin Jing
- Traditional Chinese Medicine Integrated Hospital, Southern Medical University, Guangzhou, Guangdong China
| | - Xiao-Xia Zhu
- The Key Laboratory of Molecular Biology, State Administration of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515 China
| | - Zhi-Ping Lv
- The Key Laboratory of Molecular Biology, State Administration of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515 China
| | - Xue-Gang Sun
- The Key Laboratory of Molecular Biology, State Administration of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong 510515 China ; Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong China
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25
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Early Life Stress, Nicotinic Acetylcholine Receptors and Alcohol Use Disorders. Brain Sci 2015; 5:258-74. [PMID: 26136145 PMCID: PMC4588139 DOI: 10.3390/brainsci5030258] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 06/11/2015] [Accepted: 06/18/2015] [Indexed: 01/01/2023] Open
Abstract
Stress is a major driving force in alcohol use disorders (AUDs). It influences how much one consumes, craving intensity and whether an abstinent individual will return to harmful alcohol consumption. We are most vulnerable to the effects of stress during early development, and exposure to multiple traumatic early life events dramatically increases the risk for AUDs. However, not everyone exposed to early life stress will develop an AUD. The mechanisms determining whether an individual’s brain adapts and becomes resilient to the effects of stress or succumbs and is unable to cope with stress remain elusive. Emerging evidence suggests that neuroplastic changes in the nucleus accumbens (NAc) following early life stress underlie the development of AUDs. This review discusses the impact of early life stress on NAc structure and function, how these changes affect cholinergic signaling within the mesolimbic reward pathway and the role nicotinic acetylcholine receptors (nAChRs) play in this process. Understanding the neural pathways and mechanism determining stress resilience or susceptibility will improve our ability to identify individuals susceptible to developing AUDs, formulate cognitive interventions to prevent AUDs in susceptible individuals and to elucidate and enhance potential therapeutic targets, such as the nAChRs, for those struggling to overcome an AUD.
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26
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Reiner I, Van IJzendoorn MH, Bakermans-Kranenburg MJ, Bleich S, Beutel M, Frieling H. Methylation of the oxytocin receptor gene in clinically depressed patients compared to controls: The role of OXTR rs53576 genotype. J Psychiatr Res 2015; 65:9-15. [PMID: 25890851 DOI: 10.1016/j.jpsychires.2015.03.012] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 03/16/2015] [Accepted: 03/17/2015] [Indexed: 01/31/2023]
Abstract
The emerging field of epigenetics provides a biological basis for gene-environment interactions relevant to depression. We focus on DNA methylation of exon 1 and 2 of the oxytocin receptor gene (OXTR) promoter. The research aims of the current study were to compare OXTR DNA methylation of depressed patients with healthy control subjects and to investigate possible influences of the OXTR rs53576 genotype. The sample of the present study consisted of 43 clinically depressed women recruited from a psychosomatic inpatient unit and 42 healthy, female control subjects - mean age 30 years (SD = 9). DNA methylation profiles of the OXTR gene were assessed from leukocyte DNA by means of bisulfite sequencing. Depressed female patients had decreased OXTR exon 1 DNA methylation compared to non-depressed women. The association between depression and methylation level was moderated by OXTR rs53576 genotype. Exon 2 methylation was associated with OXTR rs53576 genotype but not with depression. Our findings suggest exon-specific methylation mechanisms. Exon 1 methylation appears to be associated with depressive phenotypes whereas exon 2 methylation is influenced by genotype. Previously reported divergent associations between OXTR genotype and depression might be explained by varying exon 1 methylation. In order to further understand the etiology of depression, research on the interplay between genotype, environmental influences and exon-specific methylation patterns is needed.
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Affiliation(s)
- I Reiner
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Center, Mainz, Germany.
| | - M H Van IJzendoorn
- Center for Child and Family Studies, Rommert Casimir Institute for Developmental Psychopathology, Leiden University, Leiden, The Netherlands
| | - M J Bakermans-Kranenburg
- Center for Child and Family Studies, Rommert Casimir Institute for Developmental Psychopathology, Leiden University, Leiden, The Netherlands
| | - S Bleich
- Molecular Neuroscience Laboratory, Department of Psychiatry, Social Psychiatry and Psychotherapy, Hannover Medical School (MHH), Hannover, Germany
| | - M Beutel
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Center, Mainz, Germany
| | - H Frieling
- Molecular Neuroscience Laboratory, Department of Psychiatry, Social Psychiatry and Psychotherapy, Hannover Medical School (MHH), Hannover, Germany
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27
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Abstract
Many patients with major depressive disorder (MDD) only partially respond, and some have no clinically meaningful response, to current widely used antidepressant drugs. Due to the purported role of dopamine in the pathophysiology of depression, triple-reuptake inhibitors (TRIs) that simultaneously inhibit serotonin (5-HT), norepinephrine (NE) and dopamine reuptake could be a useful addition to the armamentarium of treatments for MDD. A TRI should more effectively activate mesolimbic dopamine-related reward-networks, restore positive mood and reduce potent 5-HT reuptake blockade associated "hypodopaminergic" adverse effects of decreased libido, weight gain and "blunting" of emotions. On the other hand, dopaminergic effects raise concern over abuse liability and TRIs may have many of the cardiovascular effects associated with NET inhibition. Several clinical development programs for potential TRI antidepressants have failed to demonstrate significantly greater efficacy than placebo or standard of care. Successful late-stage clinical development of a TRI is more likely if experimental research studies in the target population of depressed patients have demonstrated target engagement that differentially and dose-dependently improves assessments of reward-network dysfunction relative to existing antidepressants. TRI treatment could be individualized on the basis of predictive markers such as the burden of decreased positive mood symptoms and/or neuroimaging evidence of reward network dysfunction. This review focuses on how the next generation of monoamine-based treatments could be efficiently developed to address unmet medical need in MDD.
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28
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Asaoka N, Nagayasu K, Nishitani N, Yamashiro M, Shirakawa H, Nakagawa T, Kaneko S. Inhibition of histone deacetylases enhances the function of serotoninergic neurons in organotypic raphe slice cultures. Neurosci Lett 2015; 593:72-7. [PMID: 25796177 DOI: 10.1016/j.neulet.2015.03.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/10/2015] [Accepted: 03/16/2015] [Indexed: 10/23/2022]
Abstract
Inhibition of histone deacetylases (HDACs) is a promising approach for the treatment of mood disorders. However, the effects of HDAC inhibition on the serotonin (5-HT) system, a common target for psychiatric disorders, are poorly understood. Here, we show that a broad-spectrum HDAC inhibitor, trichostatin A (TSA), enhances the function of 5-HT neurons in organotypic raphe slice cultures. Sustained treatment with TSA (1μM) for 2 or 4 days significantly increased the 5-HT tissue content and tryptophan hydroxylase 2 (TPH2) expression, which were accompanied by hyper-acetylation of histone H3 in the promoter region of the TPH2 gene. TSA treatment for 4 days increased the extracellular 5-HT level, which was significantly suppressed in the presence of the selective AMPA receptor (AMPAR) antagonist NBQX. Moreover, the expression of both the AMPAR subunit GluA2 and Ca(2+)/calmodulin-dependent kinase II α (CaMKIIα) mRNAs were significantly increased by TSA treatment. Co-treatment with the CaMKII inhibitors KN-62 and KN-93 prevented the TSA-induced increase in 5-HT release, but had no effect on the increases in 5-HT tissue content. These results suggest that inhibition of HDACs increases 5-HT synthesis and release by epigenetic mechanisms, and that 5-HT release is mediated by the enhancement of AMPAR-mediated excitatory inputs and CaMKII signaling.
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Affiliation(s)
- Nozomi Asaoka
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Kazuki Nagayasu
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan; Drug Innovation Center, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan; Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Naoya Nishitani
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Mayumi Yamashiro
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Hisashi Shirakawa
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Takayuki Nakagawa
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan; Department of Clinical Pharmacology and Therapeutics, Kyoto University Hospital, Kyoto, Japan.
| | - Shuji Kaneko
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
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29
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Kang HJ, Kim JM, Bae KY, Kim SW, Shin IS, Kim HR, Shin MG, Yoon JS. Longitudinal associations between BDNF promoter methylation and late-life depression. Neurobiol Aging 2015; 36:1764.e1-1764.e7. [DOI: 10.1016/j.neurobiolaging.2014.12.035] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 11/01/2014] [Accepted: 12/26/2014] [Indexed: 01/19/2023]
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30
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Jentsch MC, Van Buel EM, Bosker FJ, Gladkevich AV, Klein HC, Oude Voshaar RC, Ruhé HG, Eisel ULM, Schoevers RA. Biomarker approaches in major depressive disorder evaluated in the context of current hypotheses. Biomark Med 2015; 9:277-97. [DOI: 10.2217/bmm.14.114] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Major depressive disorder is a heterogeneous disorder, mostly diagnosed on the basis of symptomatic criteria alone. It would be of great help when specific biomarkers for various subtypes and symptom clusters of depression become available to assist in diagnosis and subtyping of depression, and to enable monitoring and prognosis of treatment response. However, currently known biomarkers do not reach sufficient sensitivity and specificity, and often the relation to underlying pathophysiology is unclear. In this review, we evaluate various biomarker approaches in terms of scientific merit and clinical applicability. Finally, we discuss how combined biomarker approaches in both preclinical and clinical studies can help to make the connection between the clinical manifestations of depression and the underlying pathophysiology.
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Affiliation(s)
- Mike C Jentsch
- University of Groningen, University Medical Centre of Groningen, University Centre of Psychiatry, Groningen, The Netherlands
| | - Erin M Van Buel
- Department of Molecular Neurobiology, Behavioural & Cognitive Neuroscience, University of Groningen, Groningen, The Netherlands
| | - Fokko J Bosker
- University of Groningen, University Medical Centre of Groningen, University Centre of Psychiatry, Groningen, The Netherlands
- Department of Nuclear Medicine & Molecular Imaging, University of Groningen, Groningen, The Netherlands
| | - Anatoliy V Gladkevich
- University of Groningen, University Medical Centre of Groningen, University Centre of Psychiatry, Groningen, The Netherlands
| | - Hans C Klein
- University of Groningen, University Medical Centre of Groningen, University Centre of Psychiatry, Groningen, The Netherlands
- Department of Nuclear Medicine & Molecular Imaging, University of Groningen, Groningen, The Netherlands
| | - Richard C Oude Voshaar
- University of Groningen, University Medical Centre of Groningen, University Centre of Psychiatry, Groningen, The Netherlands
| | - Henricus G Ruhé
- University of Groningen, University Medical Centre of Groningen, University Centre of Psychiatry, Groningen, The Netherlands
| | - Uli LM Eisel
- Department of Molecular Neurobiology, Behavioural & Cognitive Neuroscience, University of Groningen, Groningen, The Netherlands
| | - Robert A Schoevers
- University of Groningen, University Medical Centre of Groningen, University Centre of Psychiatry, Groningen, The Netherlands
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31
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Neuroplasticity underlying the comorbidity of pain and depression. Neural Plast 2015; 2015:504691. [PMID: 25810926 PMCID: PMC4355564 DOI: 10.1155/2015/504691] [Citation(s) in RCA: 156] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 02/10/2015] [Indexed: 02/07/2023] Open
Abstract
Acute pain induces depressed mood, and chronic pain is known to cause depression. Depression, meanwhile, can also adversely affect pain behaviors ranging from symptomology to treatment response. Pain and depression independently induce long-term plasticity in the central nervous system (CNS). Comorbid conditions, however, have distinct patterns of neural activation. We performed a review of the changes in neural circuitry and molecular signaling pathways that may underlie this complex relationship between pain and depression. We also discussed some of the current and future therapies that are based on this understanding of the CNS plasticity that occurs with pain and depression.
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Dempster EL, Wong CC, Lester KJ, Burrage J, Gregory AM, Mill J, Eley TC. Genome-wide methylomic analysis of monozygotic twins discordant for adolescent depression. Biol Psychiatry 2014; 76:977-83. [PMID: 24929637 PMCID: PMC4252163 DOI: 10.1016/j.biopsych.2014.04.013] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 03/14/2014] [Accepted: 04/13/2014] [Indexed: 12/25/2022]
Abstract
BACKGROUND Adolescent depression is a common neuropsychiatric disorder that often continues into adulthood and is associated with a wide range of poor outcomes including suicide. Although numerous studies have looked at genetic markers associated with depression, the role of epigenetic variation remains relatively unexplored. METHODS Monozygotic (MZ) twins were selected from an adolescent twin study designed to investigate the interplay of genetic and environmental factors in the development of emotional and behavioral difficulties. There were 18 pairs of MZ twins identified in which one member scored consistently higher (group mean within the clinically significant range) on self-rated depression than the other. We assessed genome-wide patterns of DNA methylation in twin buccal cell DNA using the Infinium HumanMethylation450 BeadChip from Illumina. Quality control and data preprocessing was undertaken using the wateRmelon package. Differentially methylated probes (DMPs) were identified using an analysis strategy taking into account both the significance and the magnitude of DNA methylation differences. The top differentially methylated DMP was successfully validated by bisulfite-pyrosequencing, and identified DMPs were tested in postmortem brain samples obtained from patients with major depressive disorder (n = 14) and matched control subjects (n = 15). RESULTS Two reproducible depression-associated DMPs were identified, including the top-ranked DMP that was located within STK32C, which encodes a serine/threonine kinase, of unknown function. CONCLUSIONS Our data indicate that DNA methylation differences are apparent in MZ twins discordant for adolescent depression and that some of the disease-associated variation observed in buccal cell DNA is mirrored in adult brain tissue obtained from individuals with clinical depression.
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Affiliation(s)
- Emma L. Dempster
- University of Exeter Medical School, Exeter University, Exeter,Address correspondence to Emma L. Dempster, Ph.D., University of Exeter Medical School, Exeter University, RILD-Medical Research, Level 4, Royal Devon and Exeter Hospital, Barrack Rd, Exeter EX2 5DW, United Kingdom
| | - Chloe C.Y. Wong
- Social Genetic Developmental Psychiatry Centre, Institute of Psychiatry, King’s College London
| | - Kathryn J. Lester
- Social Genetic Developmental Psychiatry Centre, Institute of Psychiatry, King’s College London
| | - Joe Burrage
- University of Exeter Medical School, Exeter University, Exeter
| | - Alice M. Gregory
- Department of Psychology, Goldsmiths, University of London, London, United Kingdom
| | - Jonathan Mill
- University of Exeter Medical School, Exeter University, Exeter,Social Genetic Developmental Psychiatry Centre, Institute of Psychiatry, King’s College London
| | - Thalia C. Eley
- Social Genetic Developmental Psychiatry Centre, Institute of Psychiatry, King’s College London
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Schraut KG, Jakob SB, Weidner MT, Schmitt AG, Scholz CJ, Strekalova T, El Hajj N, Eijssen LMT, Domschke K, Reif A, Haaf T, Ortega G, Steinbusch HWM, Lesch KP, Van den Hove DL. Prenatal stress-induced programming of genome-wide promoter DNA methylation in 5-HTT-deficient mice. Transl Psychiatry 2014; 4:e473. [PMID: 25335169 PMCID: PMC4350514 DOI: 10.1038/tp.2014.107] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 08/25/2014] [Indexed: 12/12/2022] Open
Abstract
The serotonin transporter gene (5-HTT/SLC6A4)-linked polymorphic region has been suggested to have a modulatory role in mediating effects of early-life stress exposure on psychopathology rendering carriers of the low-expression short (s)-variant more vulnerable to environmental adversity in later life. The underlying molecular mechanisms of this gene-by-environment interaction are not well understood, but epigenetic regulation including differential DNA methylation has been postulated to have a critical role. Recently, we used a maternal restraint stress paradigm of prenatal stress (PS) in 5-HTT-deficient mice and showed that the effects on behavior and gene expression were particularly marked in the hippocampus of female 5-Htt+/- offspring. Here, we examined to which extent these effects are mediated by differential methylation of DNA. For this purpose, we performed a genome-wide hippocampal DNA methylation screening using methylated-DNA immunoprecipitation (MeDIP) on Affymetrix GeneChip Mouse Promoter 1.0 R arrays. Using hippocampal DNA from the same mice as assessed before enabled us to correlate gene-specific DNA methylation, mRNA expression and behavior. We found that 5-Htt genotype, PS and their interaction differentially affected the DNA methylation signature of numerous genes, a subset of which showed overlap with the expression profiles of the corresponding transcripts. For example, a differentially methylated region in the gene encoding myelin basic protein (Mbp) was associated with its expression in a 5-Htt-, PS- and 5-Htt × PS-dependent manner. Subsequent fine-mapping of this Mbp locus linked the methylation status of two specific CpG sites to Mbp expression and anxiety-related behavior. In conclusion, hippocampal DNA methylation patterns and expression profiles of female prenatally stressed 5-Htt+/- mice suggest that distinct molecular mechanisms, some of which are promoter methylation-dependent, contribute to the behavioral effects of the 5-Htt genotype, PS exposure and their interaction.
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Affiliation(s)
- K G Schraut
- Division of Molecular Psychiatry, Laboratory of Translational Neuroscience, Center of Mental Health, Department of Psychiatry, University of Wuerzburg, Wuerzburg, Germany
| | - S B Jakob
- Division of Molecular Psychiatry, Laboratory of Translational Neuroscience, Center of Mental Health, Department of Psychiatry, University of Wuerzburg, Wuerzburg, Germany
| | - M T Weidner
- Division of Molecular Psychiatry, Laboratory of Translational Neuroscience, Center of Mental Health, Department of Psychiatry, University of Wuerzburg, Wuerzburg, Germany,Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, The Netherlands
| | - A G Schmitt
- Department of Psychiatry, Psychosomatics and Psychotherapy, Center of Mental Health, University of Wuerzburg, Wuerzburg, Germany
| | - C J Scholz
- Laboratory for Microarray Applications, Interdisciplinary Center for Clinical Research, University of Wuerzburg, Wuerzburg, Germany
| | - T Strekalova
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, The Netherlands,Institute for Hygiene and Tropical Medicine, New University of Lisbon, Lisbon, Portugal
| | - N El Hajj
- Institute of Human Genetics, University of Wuerzburg, Wuerzburg, Germany
| | - L M T Eijssen
- Department of Bioinformatics-BiGCaT, Maastricht University, Maastricht, The Netherlands
| | - K Domschke
- Department of Psychiatry, Psychosomatics and Psychotherapy, Center of Mental Health, University of Wuerzburg, Wuerzburg, Germany
| | - A Reif
- Department of Psychiatry, Psychosomatics and Psychotherapy, Center of Mental Health, University of Wuerzburg, Wuerzburg, Germany
| | - T Haaf
- Institute of Human Genetics, University of Wuerzburg, Wuerzburg, Germany
| | - G Ortega
- Division of Molecular Psychiatry, Laboratory of Translational Neuroscience, Center of Mental Health, Department of Psychiatry, University of Wuerzburg, Wuerzburg, Germany
| | - H W M Steinbusch
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, The Netherlands
| | - K P Lesch
- Division of Molecular Psychiatry, Laboratory of Translational Neuroscience, Center of Mental Health, Department of Psychiatry, University of Wuerzburg, Wuerzburg, Germany,Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, The Netherlands,Division of Molecular Psychiatry, Laboratory of Translational Neuroscience, Department of Psychiatry, University of Wuerzburg, 97080 Wuerzburg, Germany. E-mail:
| | - D L Van den Hove
- Division of Molecular Psychiatry, Laboratory of Translational Neuroscience, Center of Mental Health, Department of Psychiatry, University of Wuerzburg, Wuerzburg, Germany,Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, The Netherlands
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Dell'Osso B, D'Addario C, Carlotta Palazzo M, Benatti B, Camuri G, Galimberti D, Fenoglio C, Scarpini E, Di Francesco A, Maccarrone M, Altamura AC. Epigenetic modulation of BDNF gene: differences in DNA methylation between unipolar and bipolar patients. J Affect Disord 2014; 166:330-3. [PMID: 25012449 DOI: 10.1016/j.jad.2014.05.020] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 05/09/2014] [Accepted: 05/15/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND The brain derived neurotrophic factor (BDNF) gene and its epigenetic regulation have been repeatedly implicated in the pathophysiology of mood disorders. Following previous investigation in the field, we further investigated differences in BDNF promoter gene methylation in patients with mood disorders, comparing unipolar and bipolar subjects, on the basis of illness phase, gender, age and psychotropic prescription. METHODS 154 patients (43 MDD; 61 BD I; 50 BD II), on stable pharmacological treatment, and 44 age-matched, healthy controls were recruited. BDNF methylation levels from peripheral blood mononuclear cells (PBMCs) were compared by analysis of variance followed by Bonferroni׳s post-hoc test. RESULTS Similar, higher levels of BDNF gene promoter methylation were found in BD II and MDD patients, compared to BD I subjects (P<0.01). When stratified on the basis of mood status, methylation levels of depressed patients were significantly higher, compared to the levels of manic/mixed patients (P<0.01). While gender and age did not seem to influence methylation levels of BDNF gene promoter, patients on lithium and valproate showed overall lower levels. LIMITATIONS Cross-sectional analysis using PBMCs with further investigation with larger samples, including drug-naïve patients, needed to replicate findings in neuronal cells. CONCLUSIONS Present data confirm our previous results of higher methylation levels in BD II (compared to BD I) and MDD patients (compared to controls). A closer relationship between BD II and MDD, compared to BD I patients as well an association of lower methylation levels with the presence of mania/mixed state, compared to the depressive phase, was observed.
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Affiliation(s)
- Bernardo Dell'Osso
- Dipartimento di Fisiopatologia medico-chirurgica e dei trapianti, Università degli Studi di Milano, Dipartimento di Salute Mentale, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milano, Italy.
| | - Claudio D'Addario
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Italy; Karolinska Institutet, Department of Clinical Neuroscience, Stockholm, Sweden
| | - Maria Carlotta Palazzo
- Dipartimento di Fisiopatologia medico-chirurgica e dei trapianti, Università degli Studi di Milano, Dipartimento di Salute Mentale, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milano, Italy
| | - Beatrice Benatti
- Dipartimento di Fisiopatologia medico-chirurgica e dei trapianti, Università degli Studi di Milano, Dipartimento di Salute Mentale, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milano, Italy
| | - Giulia Camuri
- Dipartimento di Fisiopatologia medico-chirurgica e dei trapianti, Università degli Studi di Milano, Dipartimento di Salute Mentale, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milano, Italy
| | - Daniela Galimberti
- Department of Neurological Sciences, Università degli Studi di Milano, Fondazione IRRCS Cà Granda, Ospedale Maggiore Policlinico, Department of Neurology, Milano, Italy
| | - Chiara Fenoglio
- Department of Neurological Sciences, Università degli Studi di Milano, Fondazione IRRCS Cà Granda, Ospedale Maggiore Policlinico, Department of Neurology, Milano, Italy
| | - Elio Scarpini
- Department of Neurological Sciences, Università degli Studi di Milano, Fondazione IRRCS Cà Granda, Ospedale Maggiore Policlinico, Department of Neurology, Milano, Italy
| | - Andrea Di Francesco
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Italy
| | - Mauro Maccarrone
- Center of Integrated Research, Campus Bio-Medico University of Rome, Italy; European Center for Brain Research (CERC)/Santa Lucia Foundation, Rome, Italy
| | - A Carlo Altamura
- Dipartimento di Fisiopatologia medico-chirurgica e dei trapianti, Università degli Studi di Milano, Dipartimento di Salute Mentale, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milano, Italy
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Perez-Cornago A, Mansego ML, Zulet MA, Martinez JA. DNA hypermethylation of the serotonin receptor type-2A gene is associated with a worse response to a weight loss intervention in subjects with metabolic syndrome. Nutrients 2014; 6:2387-403. [PMID: 24959950 PMCID: PMC4073158 DOI: 10.3390/nu6062387] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 06/11/2014] [Accepted: 06/16/2014] [Indexed: 01/30/2023] Open
Abstract
Understanding the regulation of gene activities depending on DNA methylation has been the subject of much recent study. However, although polymorphisms of the HTR2A gene have been associated with both obesity and psychiatric disorders, the role of HTR2A gene methylation in these illnesses remains uncertain. The aim of this study was to evaluate the association of HTR2A gene promoter methylation levels in white blood cells (WBC) with obesity traits and depressive symptoms in individuals with metabolic syndrome (MetS) enrolled in a behavioural weight loss programme. Analyses were based on 41 volunteers (mean age 49 ± 1 year) recruited within the RESMENA study. Depressive symptoms (as determined using the Beck Depression Inventory), anthropometric and biochemical measurements were analysed at the beginning and after six months of weight loss treatment. At baseline, DNA from WBC was isolated and cytosine methylation in the HTR2A gene promoter was quantified by a microarray approach. In the whole-study sample, a positive association of HTR2A gene methylation with waist circumference and insulin levels was detected at baseline. Obesity measures significantly improved after six months of dietary treatment, where a lower mean HTR2A gene methylation at baseline was associated with major reductions in body weight, BMI and fat mass after the treatment. Moreover, mean HTR2A gene methylation at baseline significantly predicted the decrease in depressive symptoms after the weight loss treatment. In conclusion, this study provides newer evidence that hypermethylation of the HTR2A gene in WBC at baseline is significantly associated with a worse response to a weight-loss intervention and with a lower decrease in depressive symptoms after the dietary treatment in subjects with MetS.
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Affiliation(s)
- Aurora Perez-Cornago
- Department of Nutrition, Food Science and Physiology, Center for Nutrition Research, University of Navarra, C/Irunlarrea 1, 31008-Pamplona, Spain.
| | - Maria L Mansego
- Department of Nutrition, Food Science and Physiology, Center for Nutrition Research, University of Navarra, C/Irunlarrea 1, 31008-Pamplona, Spain.
| | - María Angeles Zulet
- Department of Nutrition, Food Science and Physiology, Center for Nutrition Research, University of Navarra, C/Irunlarrea 1, 31008-Pamplona, Spain.
| | - José Alfredo Martinez
- Department of Nutrition, Food Science and Physiology, Center for Nutrition Research, University of Navarra, C/Irunlarrea 1, 31008-Pamplona, Spain.
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Pharmacoepigenetics of depression: no major influence of MAO-A DNA methylation on treatment response. J Neural Transm (Vienna) 2014; 122:99-108. [PMID: 24809685 DOI: 10.1007/s00702-014-1227-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Accepted: 04/21/2014] [Indexed: 01/13/2023]
Abstract
The monoamine oxidase A (MAO-A) gene has been suggested to be involved in the pathogenesis as well as the pharmacological treatment of major depressive disorder. In the present analysis, for the first time a pharmacoepigenetic approach was applied investigating the influence of DNA methylation patterns in the MAO-A regulatory and exon1/intron1 region on antidepressant treatment response. 94 patients of Caucasian descent with major depressive disorder (f = 61; DSM-IV) were analyzed for DNA methylation status at 43 MAO-A CpG sites via direct sequencing of sodium bisulfite treated DNA extracted from blood cells. Patients were also genotyped for the functional MAO-A VNTR. Clinical response to antidepressant treatment with escitalopram was assessed by intra-individual changes of HAM-D-21 scores after 6 weeks of treatment. Apart from two CpG sites, male subjects showed no or only very minor methylation. In female patients, lower methylation at two individual CpG sites in the MAO-A promoter region was nominally associated with impaired response to antidepressant treatment after 6 weeks (GRCh37/hg19: CpG 43.514.063, p = 0.04; CpG 43.514.684, p = 0.009), not, however, withstanding correction for multiple testing. MAO-A VNTR genotypes did not influence MAO-A methylation status. The present pilot data do not suggest a major influence of MAO-A DNA methylation on antidepressant treatment response. However, the presently observed trend towards CpG-specific MAO-A gene hypomethylation-possibly via increased gene expression and consecutively decreased serotonin and/or norepinephrine availability-to potentially drive impaired antidepressant treatment response in female patients might be worthwhile to be followed up in larger pharmacoepigenetic studies.
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Antidepressants share the ability to increase catecholamine output in the bed nucleus of stria terminalis: a possible role in antidepressant therapy? Psychopharmacology (Berl) 2014; 231:1925-33. [PMID: 24221827 DOI: 10.1007/s00213-013-3335-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Accepted: 10/12/2013] [Indexed: 02/08/2023]
Abstract
RATIONALE Antidepressants include a relatively wide spectrum of drugs that increase the synaptic concentration of monoamines, mostly through neurotransmitter reuptake blockade. The bed nucleus of stria teminalis (BNST) is considered a relay station in mediating the activation of stress response but also in the acquisition and expression of emotions. BNST is richly innervated by monoamines and sends back projections to the nucleus of origin. We previously showed that the administration of selective blockers of norepinephrine transporter (NET) increases the extracellular concentration (output) of dopamine, suggesting that dopamine could be captured by NET in the BNST. OBJECTIVES The aim of this study, carried out by means of in vivo microdialysis, was to ascertain the acute effects that antidepressants with varying mechanisms of action have on dopamine and norepinephrine output in the BNST. RESULTS We observed that all the antidepressants tested (5-20 mg/kg i.p.) increased the output of catecholamines, dose dependently. In particular, the maximum increases (as a percent of basal) for norepinephrine and dopamine respectively, were as follows: desipramine, 239 and 137; reboxetine, 185 and 128; imipramine, 512 and 359; citalopram, 95 and 122; fluoxetine, 122 and 68; bupropion, 255 and 164. CONCLUSIONS These results suggest that catecholamine transmission in the BNST may be part of a common downstream pathway that is involved in the action mechanism of antidepressants. Consequently, it is hypothesized that a dysfunction of neuronal transmission in this brain area may have a role in the etiology of affective disorders.
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Gene × environment effects of serotonin transporter, dopamine receptor D4, and monoamine oxidase A genes with contextual and parenting risk factors on symptoms of oppositional defiant disorder, anxiety, and depression in a community sample of 4-year-old children. Dev Psychopathol 2013; 25:555-75. [PMID: 23627963 DOI: 10.1017/s0954579412001241] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Genetic factors can play a key role in the multiple level of analyses approach to understanding the development of child psychopathology. The present study examined gene-environment correlations and gene × environment interactions for polymorphisms of three target genes, the serotonin transporter gene, the D4 dopamine receptor gene, and the monoamine oxidase A gene in relation to symptoms of anxiety, depression, and oppositional behavior. Saliva samples were collected from 175 non-Hispanic White, 4-year-old children. Psychosocial risk factors included socioeconomic status, life stress, caretaker depression, parental support, hostility, and scaffolding skills. In comparison with the short forms (s/s, s/l) of the serotonin transporter linked polymorphic repeat, the long form (l/l) was associated with greater increases in symptoms of oppositional defiant disorder in interaction with family stress and with greater increases in symptoms of child depression and anxiety in interaction with caretaker depression, family conflict, and socioeconomic status. In boys, low-activity monoamine oxidase A gene was associated with increases in child anxiety and depression in interaction with caretaker depression, hostility, family conflict, and family stress. The results highlight the important of gene-environment interplay in the development of symptoms of child psychopathology in young children.
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Kang HJ, Kim JM, Lee JY, Kim SY, Bae KY, Kim SW, Shin IS, Kim HR, Shin MG, Yoon JS. BDNF promoter methylation and suicidal behavior in depressive patients. J Affect Disord 2013; 151:679-685. [PMID: 23992681 DOI: 10.1016/j.jad.2013.08.001] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 07/29/2013] [Accepted: 08/01/2013] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Suicide is a major health problem, and depression is a major psychiatric cause of suicide. Suicide is influenced by the multifactorial interaction of many risk factors. Therefore, epigenetic research may lead to understandings that are applicable to suicide. This study investigated whether epigenetic changes are associated with suicidal behavior and evaluated the treatment outcome of suicidal ideation in depressive patients. METHODS In 108 patients with major depression, the promoter methylation of the gene encoding brain-derived neurotrophic factor (BDNF) was measured. Sociodemographic and clinical characteristics including a history of previous depressive episodes, age at onset, duration of illnesses, family history of depression, and number of stressful life events as well as subjective perception of stress and assessment scales for depression (HAMD), anxiety (HAMA), function (SOFAS), disability (WHODAS-12), and quality of life (WHOQOL-BREF) were evaluated at baseline. Suicidal behavior was ascertained using a semistructured clinical interview with questions about severity and intent. Beck Scale for Suicide Ideation (BSS) was administered during 12 weeks of treatment with antidepressants. RESULTS A higher BDNF promoter methylation status was significantly associated with a previous suicidal attempt history, suicidal ideation during treatment, and suicidal ideation at last evaluation as well as with higher BSS scores and poor treatment outcomes for suicidal ideation. LIMITATIONS Methylation status was investigated with limited area of the BDNF gene and sample size was relatively small. CONCLUSIONS BDNF methylation status could be a proxy marker for previous suicidal attempts and a clinical biomarker for poor treatment outcomes of suicidal ideation in depression.
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Affiliation(s)
- Hee-Ju Kang
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Jae-Min Kim
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea.
| | - Ju-Yeon Lee
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Seon-Young Kim
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Kyung-Yeol Bae
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Sung-Wan Kim
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Il-Seon Shin
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Hye-Ran Kim
- Brain Korea 21 Project, Center for Biomedical Human Resources, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Myung-Geun Shin
- Department of Laboratory Medicine, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Jin-Sang Yoon
- Department of Psychiatry, Chonnam National University Medical School, Gwangju, Republic of Korea
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Individual differences in novelty seeking predict subsequent vulnerability to social defeat through a differential epigenetic regulation of brain-derived neurotrophic factor expression. J Neurosci 2013; 33:11048-60. [PMID: 23825410 DOI: 10.1523/jneurosci.0199-13.2013] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Some personality traits, including novelty seeking, are good predictors of vulnerability to stress-related mood disorders in both humans and rodents. While high-novelty-seeking rats [high responders (HRs)] are vulnerable to the induction of depressive-like symptoms by social defeat stress, low-novelty-seeking rats [low responders (LRs)] are not. Here, we show that such individual differences are critically regulated by hippocampal BDNF. While LR animals exhibited an increase in BDNF levels following social defeat, HR individuals did not. This difference in hippocampal BDNF expression promoted the vulnerability of HR and the resilience of LR rats. Indeed, preventing activation of BDNF signaling by infusing the BDNF scavenger TrkB-Fc into the dentate gyrus of the hippocampus of LR rats led to social defeat-induced social avoidance, whereas its activation in HR rats by the TrkB agonist 7,8-dihydroxyflavone promoted social approach. Along with the changes in BDNF expression following defeat, we report in LR animals a downregulation of the inactive BDNF receptor TrkB.T1, associated with an activation of CREB through Akt-mediated signaling, but not MSK1-mediated signaling. In HR animals, none of these molecules were affected by social defeat. Importantly, the BDNF upregulation involved an epigenetically controlled transcription of bdnf exon VI, associated with a coherent regulation of relevant epigenetic factors. Altogether, our data support the importance of hippocampal BDNF regulation in response to stressful events. Moreover, we identify a specific and adaptive regulation of bdnf exon VI in the hippocampus as a critical regulator of stress resilience, and strengthen the importance of epigenetic factors in mediating stress-induced adaptive and maladaptive responses in different individuals.
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Xu J, Cheng YQ, Chen B, Bai R, Li S, Xu XF, Xu L, Wen JF, Lu ZP, Zeng XF. Depression in systemic lupus erythematosus patients is associated with link-polymorphism but not methylation status of the 5HTT promoter region. Lupus 2013; 22:1001-10. [PMID: 23893825 DOI: 10.1177/0961203313498793] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A higher prevalence of depression in systemic lupus erythematosus (SLE) patients has been reported, though the mechanism underlying this phenomenon remains unclear. The present study was conducted to explore whether the polymorphism and methylation status of the serotonin transporter gene (5HTT) promoter region (PR-5HTT) contribute to depression in SLE patients from both genetic and epigenetic perspectives. In this study, 96 SLE patients and 96 healthy controls (HCs) were recruited. Depression levels of all subjects were evaluated using the Hamilton Depression Rating Scale (HDRS). The serotonin transporter-linked polymorphism (5HTTLPR) and the DNA methylation status of PR-5HTT were detected in peripheral lymphocytes of SLE patients and HCs. The differences in 5HTTLPR and DNA methylation of PR-5HTT between SLEs and HCs were compared. In SLE patients, the frequencies of short allele (S) and SS genotype of 5HTTLPR were higher in depressive SLE (SLE-D) patients than in non-depressive SLE (SLE-ND) patients. The mean HDRS score of SS homozygote patients was higher than that of patients with SL/LL genotypes. Conversely, PR-5HTT was hypomethylated in HCs as well as SLE patients. There was no difference in the methylation status between HCs and SLEs. Thus, the functional expression of PR-5HTT may be primarily regulated by gene polymorphism and not by DNA methylation. The risk allele of 5HTTLPR appears to be a major contributor to depression in SLE patients.
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Affiliation(s)
- J Xu
- Department of Rheumatology and Immunology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, PR China
- Department of Rheumatology and Immunology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, PR China
| | - YQ Cheng
- Department of Psychiatry, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, PR China
| | - B Chen
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, PR China
| | - R Bai
- Department of Rheumatology and Immunology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, PR China
| | - S Li
- Department of Rheumatology and Immunology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, PR China
| | - XF Xu
- Department of Psychiatry, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, PR China
| | - L Xu
- Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, PR China
| | - JF Wen
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, PR China
| | - ZP Lu
- Department of Rheumatology and Immunology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, PR China
| | - XF Zeng
- Department of Rheumatology and Immunology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, PR China
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42
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Coding and noncoding gene expression biomarkers in mood disorders and schizophrenia. DISEASE MARKERS 2013; 35:11-21. [PMID: 24167345 PMCID: PMC3774957 DOI: 10.1155/2013/748095] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 02/20/2013] [Indexed: 12/13/2022]
Abstract
Mood disorders and schizophrenia are common and complex disorders with consistent evidence of genetic and environmental influences on predisposition. It is generally believed that the consequences of disease, gene expression, and allelic heterogeneity may be partly the explanation for the variability observed in treatment response. Correspondingly, while effective treatments are available for some patients, approximately half of the patients fail to respond to current neuropsychiatric treatments. A number of peripheral gene expression studies have been conducted to understand these brain-based disorders and mechanisms of treatment response with the aim of identifying suitable biomarkers and perhaps subgroups of patients based upon molecular fingerprint. In this review, we summarize the results from blood-derived gene expression studies implemented with the aim of discovering biomarkers for treatment response and classification of disorders. We include data from a biomarker study conducted in first-episode subjects with schizophrenia, where the results provide insight into possible individual biological differences that predict antipsychotic response. It is concluded that, while peripheral studies of expression are generating valuable results in pathways involving immune regulation and response, larger studies are required which hopefully will lead to robust biomarkers for treatment response and perhaps underlying variations relevant to these complex disorders.
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Association of SLC6A4 methylation with early adversity, characteristics and outcomes in depression. Prog Neuropsychopharmacol Biol Psychiatry 2013; 44:23-8. [PMID: 23333376 DOI: 10.1016/j.pnpbp.2013.01.006] [Citation(s) in RCA: 155] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 01/08/2013] [Accepted: 01/09/2013] [Indexed: 11/22/2022]
Abstract
Childhood adversities have been associated with onset and worse clinical presentations of depression. Epigenetic changes may reflect childhood adversities, while their effects on clinical characteristics of depression are unknown. This study aimed to investigate whether epigenetic changes were associated with childhood adversities, pretreatment characteristics, and treatment outcomes in depressive patients. In 108 patients with major depressive disorders, the methylation status in the promoter of gene encoding serotonin transporter (SLC6A4) was measured. Childhood adversities, socio-demographic and clinical characteristics including assessment scales for depression (Hamilton Depression Rating Scale, HAMD), anxiety (Hamilton Anxiety Rating Scale, HAMA), functioning (Social and Occupational Functioning Assessment Scale, SOFAS), disability (World Health Organization Disability Assessment Schedule-12, WHODAS-12), and quality of life (World Health Organization Quality of Life-Abbreviated form, WHOQOL-BREF) were evaluated at baseline. After a 12-week treatment with antidepressants, the assessment scales were reevaluated. To avoid type I error by multiple comparisons, Bonferroni corrections were applied. Higher SLC6A4 promoter methylation status was significantly associated with childhood adversities, worse clinical presentation (family history of depression, higher perceived stress, and more severe psychopathology assessed by SOFAS, WHODAS-12, and WHOQOL-BREF), but was not associated with treatment outcomes after considering multiple comparisons. SLC6A4 methylation status could be a proxy marker for childhood adversities and a clinical biomarker for certain presentations of depression.
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Ozomaro U, Wahlestedt C, Nemeroff CB. Personalized medicine in psychiatry: problems and promises. BMC Med 2013; 11:132. [PMID: 23680237 PMCID: PMC3668172 DOI: 10.1186/1741-7015-11-132] [Citation(s) in RCA: 155] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Accepted: 04/19/2013] [Indexed: 01/29/2023] Open
Abstract
The central theme of personalized medicine is the premise that an individual's unique physiologic characteristics play a significant role in both disease vulnerability and in response to specific therapies. The major goals of personalized medicine are therefore to predict an individual's susceptibility to developing an illness, achieve accurate diagnosis, and optimize the most efficient and favorable response to treatment. The goal of achieving personalized medicine in psychiatry is a laudable one, because its attainment should be associated with a marked reduction in morbidity and mortality. In this review, we summarize an illustrative selection of studies that are laying the foundation towards personalizing medicine in major depressive disorder, bipolar disorder, and schizophrenia. In addition, we present emerging applications that are likely to advance personalized medicine in psychiatry, with an emphasis on novel biomarkers and neuroimaging.
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Affiliation(s)
- Uzoezi Ozomaro
- University of Miami, Leonard M. Miller School of Medicine, Miami, FL, USA
| | - Claes Wahlestedt
- University of Miami, Leonard M. Miller School of Medicine, Miami, FL, USA
- Center for Therapeutic Innovation, Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Psychiatry and Behavioral Sciences, University of Miami, Leonard M. Miller School of Medicine, Miami, FL, USA
| | - Charles B Nemeroff
- University of Miami, Leonard M. Miller School of Medicine, Miami, FL, USA
- Center for Therapeutic Innovation, Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Psychiatry and Behavioral Sciences, University of Miami, Leonard M. Miller School of Medicine, Miami, FL, USA
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H3K4 tri-methylation in synapsin genes leads to different expression patterns in bipolar disorder and major depression. Int J Neuropsychopharmacol 2013; 16:289-99. [PMID: 22571925 PMCID: PMC3564952 DOI: 10.1017/s1461145712000363] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The synapsin family of neuronal phosphoproteins is composed of three genes (SYN1, SYN2 and SYN3) with alternative splicing resulting in a number of variants with various levels of homology. These genes have been postulated to play significant roles in several neuropsychiatric disorders, including bipolar disorder, schizophrenia and epilepsy. Epigenetic regulatory mechanisms, such as histone modifications in gene regulatory regions, have also been proposed to play a role in a number of psychiatric disorders, including bipolar disorder and major depressive disorder. One of the best characterized histone modifications is histone 3 lysine 4 tri-methylation (H3K4me3), an epigenetic mark shown to be highly enriched at transcriptional start sites and associated with active transcription. In the present study we have quantified the expression of transcript variants of the three synapsin genes and investigated their relationship to H3K4me3 promoter enrichment in post-mortem brain samples. We found that histone modification marks were significantly increased in bipolar disorder and major depression and this effect was correlated with significant increases in gene expression. Our findings suggest that synapsin dysregulation in mood disorders is mediated in part by epigenetic regulatory mechanisms.
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Association between promoter methylation of serotonin transporter gene and depressive symptoms: a monozygotic twin study. Psychosom Med 2013; 75:523-9. [PMID: 23766378 PMCID: PMC3848698 DOI: 10.1097/psy.0b013e3182924cf4] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
OBJECTIVE Epigenetic mechanisms have been implicated in the pathogenesis of psychiatric disorders. The serotonin transporter gene (SLC6A4) is a key candidate gene for depression. We examined the association between SLC6A4 promoter methylation variation and depressive symptoms using 84 monozygotic twin pairs. METHODS DNA methylation level in the SLC6A4 promoter region was quantified by bisulfite pyrosequencing using genomic DNA isolated from peripheral blood leukocytes. The number of current depressive symptoms was assessed using the Beck Depressive Inventory II (BDI-II). The association between methylation variation and depressive symptoms was examined using matched twin-pair analyses, adjusting for body mass index, smoking, physical activity, and alcohol consumption. Multiple testing was controlled by adjusted false discovery rate (q value). RESULTS Intrapair difference in DNA methylation variation at 10 of the 20 studied CpG sites is significantly correlated with intrapair difference in BDI scores. Linear regression using intrapair differences demonstrates that intrapair difference in BDI score was significantly associated with intrapair differences in DNA methylation variation after adjusting for potential confounders and correction for multiple testing. On average, a 10% increase in the difference in mean DNA methylation level was associated with 4.4 increase in the difference in BDI score (95% confidence interval = 0.9-7.9, p = .01). CONCLUSIONS This study provides evidence that variation in methylation level within the promoter region of the serotonin transporter gene is associated with variation in depressive symptoms in a large sample of monozygotic twin pairs. This relationship is not confounded by genetic and shared environment. The 5-HTTLPR genotype also does not modulate this association.
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Massart R, Mongeau R, Lanfumey L. Beyond the monoaminergic hypothesis: neuroplasticity and epigenetic changes in a transgenic mouse model of depression. Philos Trans R Soc Lond B Biol Sci 2012; 367:2485-94. [PMID: 22826347 DOI: 10.1098/rstb.2012.0212] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The monoamine hypothesis of depression has dominated our understanding of both the pathophysiology of depression and the action of pharmacological treatments for the last decades, and it has led to the production of several generations of antidepressant agents. However, there are serious limitations to the current monoamine theory, and additional mechanisms, including hypothalamic-pituitary-adrenal (HPA) axis dysfunctions, as well as neurodegenerative and inflammatory alterations, are potentially associated with the pathogenesis of mood disorders. Moreover, new data have recently indicated that epigenetic mechanisms such as histone modifications and DNA methylation could affect diverse pathways leading to depression-like behaviours in animal models. In a transgenic mouse model of depression, in which a downregulation of glucocorticoid receptors (GR) causes a deficit in the HPA axis feedback control, besides alterations in monoamine neurotransmission and neuroplasticity, we found modifications in the expression of many proteins involved in epigenetic regulation, as well as clock genes, in the hippocampus and the frontal cortex, that might be central in the genesis of depressive-like behaviours.
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Affiliation(s)
- Renaud Massart
- Inserm, U894, , Centre de Psychiatrie et Neurosciences, 75013 Paris, France
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48
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Bosch OG, Seifritz E, Wetter TC. Stress-related depression: neuroendocrine, genetic, and therapeutical aspects. World J Biol Psychiatry 2012; 13:556-68. [PMID: 22676799 DOI: 10.3109/15622975.2012.665477] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE To summarize current concepts on neuroendocrine and genetic principles underlying stress-related depression and to discuss the challenges of personalized treatment in depression. METHODS Review of the literature pertaining to genetic and neuroendocrine basis of stress-related depression including aspects of treatment response with a focus on the hypothalamus-pituitary-adrenal (HPA) axis. RESULTS There is increasing evidence that genetic polymorphisms and dysregulation of the HPA axis are associated with the pathophysiology of stress-related depression. Individual stress hormone reactivity seems to be determined by a combination of genetic and environmental factors, contributing to both, resilience or vulnerability. CONCLUSIONS Although substantial progress has been made, current knowledge is still limited. Further basic and clinical research is needed to identify specific subgroups and to minimize heterogeneity of the depression phenotype. A better characterization is essential to detect genetic and functional predictors of antidepressant treatment response to follow the vision of personalized therapy in psychiatry.
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Affiliation(s)
- Oliver G Bosch
- Clinic of Affective Disorders and General Psychiatry, University Hospital of Psychiatry, Zurich, Switzerland
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Frey S, Birchler-Pedross A, Hofstetter M, Brunner P, Götz T, Münch M, Blatter K, Knoblauch V, Wirz-Justice A, Cajochen C. Challenging the sleep homeostat: Sleep in depression is not premature aging. Sleep Med 2012; 13:933-45. [DOI: 10.1016/j.sleep.2012.03.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 01/30/2012] [Accepted: 03/06/2012] [Indexed: 11/28/2022]
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van Eekelen JAM, Ellis JA, Pennell CE, Craig J, Saffery R, Mattes E, Olsson CA. Stress-sensitive neurosignalling in depression: an integrated network biology approach to candidate gene selection for genetic association analysis. Ment Illn 2012; 4:e21. [PMID: 25478122 PMCID: PMC4253374 DOI: 10.4081/mi.2012.e21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 07/06/2012] [Accepted: 08/01/2012] [Indexed: 01/18/2023] Open
Abstract
Genetic risk for depressive disorders is poorly understood despite consistent suggestions of a high heritable component. Most genetic studies have focused on risk associated with single variants, a strategy which has so far only yielded small (often non-replicable) risks for depressive disorders. In this paper we argue that more substantial risks are likely to emerge from genetic variants acting in synergy within and across larger neurobiological systems (polygenic risk factors). We show how knowledge of major integrated neurobiological systems provides a robust basis for defining and testing theoretically defensible polygenic risk factors. We do this by describing the architecture of the overall stress response. Maladaptation via impaired stress responsiveness is central to the aetiology of depression and anxiety and provides a framework for a systems biology approach to candidate gene selection. We propose principles for identifying genes and gene networks within the neurosystems involved in the stress response and for defining polygenic risk factors based on the neurobiology of stress-related behaviour. We conclude that knowledge of the neurobiology of the stress response system is likely to play a central role in future efforts to improve genetic prediction of depression and related disorders.
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Affiliation(s)
- J. Anke M. van Eekelen
- Developmental Neuroscience, Telethon Institute for Child Health Research and Centre for Child Health Research, University of Western Australia, Perth
| | - Justine A. Ellis
- Environmental and Genetic Epidemiology, Murdoch Childrens Research Institute, The Royal Children's Hospital and Department of Physiology, University of Melbourne
| | - Craig E. Pennell
- The School of Women's and Infants' Health, University of Western Australia at King Edward Memorial Hospital
| | - Jeff Craig
- Developmental Epigenetics, Early Development and Disease, Department of Paediatrics, Murdoch Childrens Research Institute, Royal Children's Hospital
| | - Richard Saffery
- Developmental Epigenetics, Early Development and Disease, Department of Paediatrics, Murdoch Childrens Research Institute, Royal Children's Hospital
| | - Eugen Mattes
- Developmental Neuroscience, Telethon Institute for Child Health Research and Centre for Child Health Research, University of Western Australia, Perth
| | - Craig A. Olsson
- School of Psychology, Deakin University Australia; Murdoch Childrens Research Institute; University of Melbourne, Australia
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