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Soto NN, Gaspar P, Bacci A. Not Just a Mood Disorder─Is Depression a Neurodevelopmental, Cognitive Disorder? Focus on Prefronto-Thalamic Circuits. ACS Chem Neurosci 2024; 15:1611-1618. [PMID: 38580316 PMCID: PMC11027097 DOI: 10.1021/acschemneuro.3c00828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 04/07/2024] Open
Abstract
Depression is one of the most burdensome psychiatric disorders, affecting hundreds of millions of people worldwide. The disease is characterized not only by severe emotional and affective impairments, but also by disturbed vegetative and cognitive functions. Although many candidate mechanisms have been proposed to cause the disease, the pathophysiology of cognitive impairments in depression remains unclear. In this article, we aim to assess the link between cognitive alterations in depression and possible developmental changes in neuronal circuit wiring during critical periods of susceptibility. We review the existing literature and propose a role of serotonin signaling during development in shaping the functional states of prefrontal neuronal circuits and prefronto-thalamic loops. We discuss how early life insults affecting the serotonergic system could be important in the alterations of these local and long-range circuits, thus favoring the emergence of neurodevelopmental disorders, such as depression.
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Affiliation(s)
- Nina Nitzan Soto
- ICM−Paris
Brain Institute, CNRS, INSERM, Sorbonne
Université, 47 Boulevard de l’Hopital, 75013 Paris, France
| | - Patricia Gaspar
- ICM−Paris
Brain Institute, CNRS, INSERM, Sorbonne
Université, 47 Boulevard de l’Hopital, 75013 Paris, France
| | - Alberto Bacci
- ICM−Paris
Brain Institute, CNRS, INSERM, Sorbonne
Université, 47 Boulevard de l’Hopital, 75013 Paris, France
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2
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Mázala-de-Oliveira T, Silva BT, Campello-Costa P, Carvalho VF. The Role of the Adrenal-Gut-Brain Axis on Comorbid Depressive Disorder Development in Diabetes. Biomolecules 2023; 13:1504. [PMID: 37892186 PMCID: PMC10604999 DOI: 10.3390/biom13101504] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/15/2023] [Accepted: 08/26/2023] [Indexed: 10/29/2023] Open
Abstract
Diabetic patients are more affected by depression than non-diabetics, and this is related to greater treatment resistance and associated with poorer outcomes. This increase in the prevalence of depression in diabetics is also related to hyperglycemia and hypercortisolism. In diabetics, the hyperactivity of the HPA axis occurs in parallel to gut dysbiosis, weakness of the intestinal permeability barrier, and high bacterial-product translocation into the bloodstream. Diabetes also induces an increase in the permeability of the blood-brain barrier (BBB) and Toll-like receptor 4 (TLR4) expression in the hippocampus. Furthermore, lipopolysaccharide (LPS)-induced depression behaviors and neuroinflammation are exacerbated in diabetic mice. In this context, we propose here that hypercortisolism, in association with gut dysbiosis, leads to an exacerbation of hippocampal neuroinflammation, glutamatergic transmission, and neuronal apoptosis, leading to the development and aggravation of depression and to resistance to treatment of this mood disorder in diabetic patients.
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Affiliation(s)
- Thalita Mázala-de-Oliveira
- Laboratório de Inflamação, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (T.M.-d.-O.); (B.T.S.)
| | - Bruna Teixeira Silva
- Laboratório de Inflamação, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (T.M.-d.-O.); (B.T.S.)
- Programa de Pós-Graduação em Neurociências, Instituto de Biologia, Universidade Federal Fluminense, Niterói 24210-201, Brazil;
| | - Paula Campello-Costa
- Programa de Pós-Graduação em Neurociências, Instituto de Biologia, Universidade Federal Fluminense, Niterói 24210-201, Brazil;
| | - Vinicius Frias Carvalho
- Laboratório de Inflamação, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (T.M.-d.-O.); (B.T.S.)
- Programa de Pós-Graduação em Neurociências, Instituto de Biologia, Universidade Federal Fluminense, Niterói 24210-201, Brazil;
- Laboratório de Inflamação, Instituto Nacional de Ciência e Tecnologia em Neuroimunomodulação—INCT-NIM, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil
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3
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Grabowska K, Ziemichód W, Biała G. Recent Studies on the Development of Nicotine Abuse and Behavioral Changes Induced by Chronic Stress Depending on Gender. Brain Sci 2023; 13:brainsci13010121. [PMID: 36672102 PMCID: PMC9857036 DOI: 10.3390/brainsci13010121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/04/2023] [Accepted: 01/06/2023] [Indexed: 01/12/2023] Open
Abstract
Nowadays, stressful situations are an unavoidable element of everyday life. Stressors activate a number of complex mental and physiological reactions in the organism, thus affecting the state of health of an individual. Stress is the main risk factor in the development of mental disorders, such as depression and other disorders developing as a result of addiction. Studies indicate that women are twice as likely as men to develop anxiety, depression and therefore addiction, e.g., to nicotine. Even though the data presented is indicative of significant differences between the sexes in the prevalence of these disorders, the majority of preclinical animal models for investigating stress-induced disorders use predominantly male subjects. However, the recent data indicates that this type of studies has also been launched in female rodents. Therefore, conducting research on both sexes allows for a more accurate understanding and assessment of the impact of stress on stress-induced behavioral, peripheral and molecular changes in the body and brain. In this manuscript we have gathered the data from 41 years (from 1981-2022) on the influence of stress on the development of depression and nicotine addiction in both sexes.
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Alizadeh-Ezdini Z, Vatanparast J. Differential impact of two paradigms of early-life adversity on behavioural responses to social defeat in young adult rats and morphology of CA3 pyramidal neurons. Behav Brain Res 2022; 435:114048. [PMID: 35952779 DOI: 10.1016/j.bbr.2022.114048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 07/20/2022] [Accepted: 08/06/2022] [Indexed: 01/06/2023]
Abstract
Early life stress (ELS) is an important factor in programing the brain for future response to stress, and resilience or vulnerability to stress-induced emotional disorders. The hippocampal formation, with essential roles in both regulating the stress circuitry and emotionality, contributes to this adaptive programing. Here, we examined the effects of early handling (EH) and maternal deprivation (MD) as mild and intense postnatal stressors, respectively, on the behavioural responses to social defeat stress in young adulthood. We also evaluated the interaction of mild and intense ELS with later social defeat (SD) stress on the morphology and dendritic spine density of Golgi-cox-stained CA3 hippocampal neurons. SD stress in adult rats, as expected, increased anxiety and depressive-like behaviours in the open field, elevated plus-maze and forced swimming test. These effects were associated with reduction of dendritic spines and soma size of CA3 neurons. Both behavioural and structural alterations were significantly ameliorated in socially defeated rats that experienced early handling (EH-SD). Basal dendrites of CA3 neurons in EH-SD rats also showed longer dendrites and more intersections with Sholl circles in the distal portion, compared to both control and SD rats. On the other hand, in socially defeated rats with maternal deprivation experience (MD-SD) the stress-induced behavioural and structural alterations were generally intensified compared to SD rats. In MD-SD rats, apical dendrites of CA3 neurons demonstrated remarkable retraction; an effect that was not detected in SD rats. The reduction of dendritic spines density on the apical dendrites of CA3 neurons was also more pronounced in MD-SD rats compared to SD rats. Dendritic arbors and spines comprise the major neuronal substrate for the circuit connectivity, and cell region-specific alterations of dendrites and spines in CA3 neurons reveal plausible mechanisms that can underlie the impact of different ELSs on risk for affective disorders in response to social stress in adulthood.
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Affiliation(s)
| | - Jafar Vatanparast
- Department of Biology, School of Science, Shiraz University, Shiraz, Iran.
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5
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Wang Y, Wang Y, Zhou J, Ge C, Shi Y, Hu Z. Volumetric changes in specific neurofunctional subfields of the hippocampus in major depressive disorder. Neuroreport 2022; 33:380-385. [PMID: 35594428 DOI: 10.1097/wnr.0000000000001794] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE There is evidence that hippocampal volume is abnormal in patients with major depressive disorder (MDD), but there have been no studies on volumetric changes in different subfields based on functional topography. This was investigated in the present study by comparing hippocampal neurofunctional subfield volumes between MDD patients and healthy control (HC) subjects. METHODS Patients with MDD (n = 44) and HCs (n = 27) recruited at Shanghai Traditional Chinese Medicine Integrated Hospital underwent a T1-weighted anatomical MRI scan in the sagittal orientation, and the data were used to calculate hippocampal subfield volumes. Logistic regression was used to evaluate the association between the volumes and risk of MDD. A nomogram for predicting MDD risk based on volume changes in different subfields was developed, and its predictive power was evaluated by calculating the concordance (C)-index. RESULTS Compared with HCs, MDD patients showed reduced volume in hippocampal neurofunctional subfields, specifically in left (L)1, right (R)1, and R2 (related to emotion) and L2, L3, and R4 (related to cognition and perception). The logistic regression analysis revealed that the risk of MDD was 4.59-, 5.8-, 8.33-, and 6.92-fold higher with atrophies of L1, L2, L3, and R4, respectively. A nomogram for predicting MDD risk was developed based on age; sex; and hippocampal L1, L2, L3, and R4 subfield volumes and showed good accuracy, with a C-index of 0.784. CONCLUSION Volumetric changes in the neurofunctional subfield of the hippocampus are potential imaging markers that can predict the occurrence of MDD.
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Affiliation(s)
- Yuning Wang
- Yueyang Clinical Medicine School, Shanghai University of Traditional Chinese Medicine
| | - Yi Wang
- Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine
| | - Jing Zhou
- Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine
| | - Chenjin Ge
- Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine
| | - Yin Shi
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zhihai Hu
- Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine
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Ousdal OT, Brancati GE, Kessler U, Erchinger V, Dale AM, Abbott C, Oltedal L. The Neurobiological Effects of Electroconvulsive Therapy Studied Through Magnetic Resonance: What Have We Learned, and Where Do We Go? Biol Psychiatry 2022; 91:540-549. [PMID: 34274106 PMCID: PMC8630079 DOI: 10.1016/j.biopsych.2021.05.023] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 05/12/2021] [Accepted: 05/12/2021] [Indexed: 12/14/2022]
Abstract
Electroconvulsive therapy (ECT) is an established treatment choice for severe, treatment-resistant depression, yet its mechanisms of action remain elusive. Magnetic resonance imaging (MRI) of the human brain before and after treatment has been crucial to aid our comprehension of the ECT neurobiological effects. However, to date, a majority of MRI studies have been underpowered and have used heterogeneous patient samples as well as different methodological approaches, altogether causing mixed results and poor clinical translation. Hence, an association between MRI markers and therapeutic response remains to be established. Recently, the availability of large datasets through a global collaboration has provided the statistical power needed to characterize whole-brain structural and functional brain changes after ECT. In addition, MRI technological developments allow new aspects of brain function and structure to be investigated. Finally, more recent studies have also investigated immediate and long-term effects of ECT, which may aid in the separation of the therapeutically relevant effects from epiphenomena. The goal of this review is to outline MRI studies (T1, diffusion-weighted imaging, proton magnetic resonance spectroscopy) of ECT in depression to advance our understanding of the ECT neurobiological effects. Based on the reviewed literature, we suggest a model whereby the neurobiological effects can be understood within a framework of disruption, neuroplasticity, and rewiring of neural circuits. An improved characterization of the neurobiological effects of ECT may increase our understanding of ECT's therapeutic effects, ultimately leading to improved patient care.
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Affiliation(s)
- Olga Therese Ousdal
- Mohn Medical Imaging and Visualization Centre, Department of Radiology, Haukeland University Hospital, Bergen, Norway; Centre for Crisis Psychology, Faculty of Psychology, University of Bergen, Bergen, Norway.
| | - Giulio E Brancati
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Ute Kessler
- NORMENT, Division of Psychiatry, Haukeland University Hospital, Bergen, Norway; Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Vera Erchinger
- Mohn Medical Imaging and Visualization Centre, Department of Radiology, Haukeland University Hospital, Bergen, Norway; Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Anders M Dale
- Center for Multimodal Imaging and Genetics, University of California San Diego, La Jolla, California; Department of Radiology, University of California San Diego, La Jolla, California; Department of Neurosciences, University of California San Diego, La Jolla, California
| | - Christopher Abbott
- Department of Psychiatry, University of New Mexico, Albuquerque, New Mexico
| | - Leif Oltedal
- Mohn Medical Imaging and Visualization Centre, Department of Radiology, Haukeland University Hospital, Bergen, Norway; Department of Clinical Medicine, University of Bergen, Bergen, Norway.
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7
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MacLellan A, Fureix C, Polanco A, Mason G. Can animals develop depression? An overview and assessment of ‘depression-like’ states. BEHAVIOUR 2021. [DOI: 10.1163/1568539x-bja10132] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Describing certain animal behaviours as ‘depression-like’ or ‘depressive’ has become common across several fields of research. These typically involve unusually low activity or unresponsiveness and/or reduced interest in pleasure (anhedonia). While the term ‘depression-like’ carefully avoids directly claiming that animals are depressed, this narrative review asks whether stronger conclusions can be legitimate, with animals developing the clinical disorder as seen in humans (cf., DSM-V/ICD-10). Here, we examine evidence from animal models of depression (especially chronically stressed rats) and animals experiencing poor welfare in conventional captive conditions (e.g., laboratory mice and production pigs in barren environments). We find troubling evidence that animals are indeed capable of experiencing clinical depression, but demonstrate that a true diagnosis has yet to be confirmed in any case. We thus highlight the importance of investigating the co-occurrence of depressive criteria and discuss the potential welfare and ethical implications of animal depression.
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Affiliation(s)
- Aileen MacLellan
- Department of Integrative Biology, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Carole Fureix
- Bristol Veterinary School, University of Bristol, Langford, UK
| | - Andrea Polanco
- Department of Integrative Biology, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Georgia Mason
- Department of Integrative Biology, University of Guelph, Guelph, ON, Canada N1G 2W1
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8
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Macro- and Microscale Stress-Associated Alterations in Brain Structure: Translational Link With Depression. Biol Psychiatry 2021; 90:118-127. [PMID: 34001371 DOI: 10.1016/j.biopsych.2021.04.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 04/06/2021] [Accepted: 04/07/2021] [Indexed: 02/06/2023]
Abstract
Major depressive disorder (MDD) is a stress-related disorder associated with many cytoarchitectural and neurochemical changes. However, the majority of these changes cannot be reliably detected in the living brain. The examination of animal stress models and postmortem human brain tissue has significantly contributed to our understanding of the pathophysiology of MDD. Ronald Duman's work in humans and in rodent models was critical to the investigation of the contribution of synaptic deficits to MDD and chronic stress pathology, their role in the development and expression of depressive-like behavior, and reversal by novel drugs. Here, we review evidence from magnetic resonance imaging in humans and animals that suggests that corticolimbic alterations are associated with depression symptomatology. We also discuss evidence of cytoarchitectural alterations affecting neurons, astroglia, and synapses in MDD and highlight how similar changes are described in rodent chronic stress models and are linked to the emotion-related behavioral deficits. Finally, we report on the latest approaches developed to measure the synaptic and astroglial alterations in vivo, using positron emission tomography, and how it can inform on the contribution of MDD-associated cytoarchitectural alterations to the symptomatology and the treatment of stress-related disorders.
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9
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Zhang JH, Yang HZ, Su H, Song J, Bai Y, Deng L, Feng CP, Guo HX, Wang Y, Gao X, Gu Y, Zhen Z, Lu Y. Berberine and Ginsenoside Rb1 Ameliorate Depression-Like Behavior in Diabetic Rats. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2021; 49:1195-1213. [PMID: 34049474 DOI: 10.1142/s0192415x21500579] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Rhizoma coptidis (Huang-lian) and Asian ginseng have been widely used in the treatment of diabetes and other concurrent diseases with apparent effects. This study investigated the effects of the active ingredients of R. coptidis and ginseng, berberine and ginsenoside Rb1, on depression-like behavior in a rat diabetes model. The animal model was established via a high-fat diet and intraperitoneal injection of streptozotocin, while the animal's depression-like behavior was induced via chronic unpredictable mild stress. These experimental rats were divided into four groups: control, depression-like behavior (DLB), metformin plus fluoxetine hydrochloride (M+FH), and berberine plus ginsenoside Rb1 (B+GRb1) groups. Glucose metabolism and insulin resistance were evaluated by oral glucose test and glucose clamp study. Depression-like behavior was evaluated via behavioral analyses, including forced swim, sucrose preference, elevated plus maze, and open-field tests. HE and Nissl staining, plasma cortisol expression of adrenocorticotropic hormone, and brain-derived neurotrophic factor (BDNF) levels were assayed to explore the mechanisms of action. Compared with the control, rats in the DLB group had a significant increase in the levels of blood glucose and depression-like behavior. The B+GRb1 group significantly improved glucose metabolism and insulin resistance, reduced depression-like behavior, downregulated levels of plasma cortisol and adrenocorticotropic hormone under stress, and upregulated BDNF protein expression compared to the DLB rats. HE and Nissl staining data revealed that B+GRb1 protected neurons from pathological and morphological changes. Thus, berberine and ginsenoside Rb1 not only improved glucose metabolism in diabetic rats but also ameliorated their depression-like behavior under chronic unpredictable stress. Mechanistically, studied data with plasma hormonal levels and brain neuronal pathological/morphological changes supported the observed effects. The combination of berberine and ginsenoside Rb1 may have a clinical value in the management of diabetic patients with depression.
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Affiliation(s)
| | - Hui-Zeng Yang
- Tianjin Anding Hospital, Tianjian 300022, P. R. China
| | - Hao Su
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, P. R. China
| | - Jun Song
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, P. R. China
| | - Yu Bai
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, P. R. China
| | - Lan Deng
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, P. R. China
| | - Chun-Peng Feng
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, P. R. China
| | - Hong-Xia Guo
- Langfang Normal University, Langfang 065000, P. R. China
| | - Yi Wang
- Tianjin Anding Hospital, Tianjian 300022, P. R. China
| | - Xin Gao
- Tianjin Anding Hospital, Tianjian 300022, P. R. China
| | - Yan Gu
- Tianjin Third Central Hospital, Tianjian 300170, P. R. China
| | - Zhong Zhen
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, P. R. China
| | - Yao Lu
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, P. R. China
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10
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Virmani G, D'almeida P, Nandi A, Marathe S. Subfield-specific effects of chronic mild unpredictable stress on hippocampal astrocytes. Eur J Neurosci 2021; 54:5730-5746. [PMID: 33866634 DOI: 10.1111/ejn.15234] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 04/04/2021] [Indexed: 12/20/2022]
Abstract
Major depressive disorder (MDD) is a debilitating neuropsychiatric illness affecting over 20% of the population worldwide. Despite its prevalence, our understanding of its pathophysiology is severely limited, thus hampering the development of novel therapeutic strategies. Recent advances have clearly established astrocytes as major players in the pathophysiology, and plausibly pathogenesis, of major depression. In particular, astrocyte density in the hippocampus is severely diminished in MDD patients and correlates strongly with the disease outcome. Moreover, astrocyte densities from different subfields of the hippocampus show varying trends in terms of their correlation to the disease outcome. Given the central role that hippocampus plays in the pathophysiology of depression and in the action of antidepressant drugs, changes in hippocampal astrocyte density and physiology may have a significant effect on behavioral symptoms of MDD. In this study, we used chronic mild unpredictable stress (CMUS) in mice, which induces a depressive-like state, and examined its effects on astrocytes from different subfields of the hippocampus. We used SOX9 and S100β immunostaining to estimate the number of astrocytes per square millimeter from various hippocampal subfields. Furthermore, using confocal images of fluorescently labeled glial fibrillary acidic protein (GFAP)-immunopositive hippocampal astrocytes, we quantified various morphology-related parameters and performed Sholl analysis. We found that CMUS exerts differential effects on astrocyte cell numbers, ramification, cell radius, surface area, and process width of hippocampal astrocytes from different hippocampal subfields. Taken together, our study reveals that chronic stress does not uniformly affect all hippocampal astrocytes; but exerts its effects differentially on different astrocytic subpopulations within the hippocampus.
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Affiliation(s)
- Garima Virmani
- Centre for Neuroscience, Indian Institute of Science, Bangalore, India
| | - Priyal D'almeida
- Centre for Neuroscience, Indian Institute of Science, Bangalore, India
| | - Arnab Nandi
- Centre for Neuroscience, Indian Institute of Science, Bangalore, India
| | - Swananda Marathe
- Centre for Neuroscience, Indian Institute of Science, Bangalore, India
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11
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Bombardi C, Grandis A, Pivac N, Sagud M, Lucas G, Chagraoui A, Lemaire-Mayo V, De Deurwaerdère P, Di Giovanni G. Serotonin modulation of hippocampal functions: From anatomy to neurotherapeutics. PROGRESS IN BRAIN RESEARCH 2021; 261:83-158. [PMID: 33785139 DOI: 10.1016/bs.pbr.2021.01.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The hippocampal region receives a dense serotoninergic innervation originating from both medial and dorsal raphe nuclei. This innervation regulates hippocampal activity through the activation of distinct receptor families that are expressed in excitatory and inhibitory neurons, terminals of several afferent neurotransmitter systems, and glial cells. Preclinical and clinical studies indicate that hippocampal dysfunctions are involved in learning and memory deficits, dementia, Alzheimer's disease, epilepsy and mood disorders such as anxiety, depression and post-traumatic syndrome disorder, whereas the hippocampus participates also in the therapeutic mechanisms of numerous medicines. Not surprisingly, several drugs acting via 5-HT mechanisms are efficacious to some extent in some diseases and the link between 5-HT and the hippocampus although clear remains difficult to untangle. For this reason, we review reported data concerning the distribution and the functional roles of the 5-HT receptors in the hippocampal region in health and disease. The impact of the 5-HT systems on the hippocampal function is such that the research of new 5-HT mechanisms and drugs is still very active. It concerns notably drugs acting at the 5-HT1A,2A,2C,4,6 receptor subtypes, in addition to the already existing drugs including the selective serotonin reuptake inhibitors.
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Affiliation(s)
- Cristiano Bombardi
- Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy.
| | - Annamaria Grandis
- Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy
| | - Nela Pivac
- Division of Molecular Medicine, Rudier Boskovic Institute, Zagreb, Croatia
| | - Marina Sagud
- Clinical Hospital Center Zagreb and School of Medicine University of Zagreb, Zagreb, Croatia
| | - Guillaume Lucas
- Neurocentre Magendie, INSERM 1215, Université de Bordeaux, Bordeaux, France
| | - Abdeslam Chagraoui
- Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, Institute for Research and Innovation in Biomedicine of Normandy (IRIB), Normandie University, UNIROUEN, INSERM U1239, Rouen, France; Department of Medical Biochemistry, Rouen University Hospital, Rouen, France
| | - Valérie Lemaire-Mayo
- Centre National de la Recherche Scientifique, Institut des Neurosciences Intégratives et Cognitives d'Aquitaine, UMR 5287, Bordeaux, France
| | - Philippe De Deurwaerdère
- Centre National de la Recherche Scientifique, Institut des Neurosciences Intégratives et Cognitives d'Aquitaine, UMR 5287, Bordeaux, France
| | - Giuseppe Di Giovanni
- Laboratory of Neurophysiology, Department of Physiology and Biochemistry, Faculty of Medicine and Surgery, University of Malta, Msida, Malta; Neuroscience Division, School of Biosciences, Cardiff University, Cardiff, United Kingdom
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12
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Stenovec M, Li B, Verkhratsky A, Zorec R. Astrocytes in rapid ketamine antidepressant action. Neuropharmacology 2020; 173:108158. [PMID: 32464133 DOI: 10.1016/j.neuropharm.2020.108158] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 04/27/2020] [Accepted: 05/20/2020] [Indexed: 12/14/2022]
Abstract
Ketamine, a general anaesthetic and psychotomimetic drug, exerts rapid, potent and long-lasting antidepressant effect, albeit the cellular and molecular mechanisms of this action are yet to be discovered. Besides targeting neuronal NMDARs fundamental for synaptic transmission, ketamine affects the function of astroglia the key homeostatic cells of the central nervous system that contribute to pathophysiology of psychiatric diseases including depression. Here we review studies revealing that (sub)anaesthetic doses of ketamine elevate intracellular cAMP concentration ([cAMP]i) in astrocytes, attenuate stimulus-evoked astrocyte calcium signalling, which regulates exocytotic secretion of gliosignalling molecules, and stabilize the vesicle fusion pore in a narrow configuration possibly hindering cargo discharge or vesicle recycling. Next we discuss how ketamine affects astroglial capacity to control extracellular K+ by reducing cytoplasmic mobility of vesicles delivering the inward rectifying potassium channel (Kir4.1) to the plasmalemma. Modified astroglial K+ buffering impacts upon neuronal excitability as demonstrated in the lateral habenula rat model of depression. Finally, we highlight the recent discovery that ketamine rapidly redistributes cholesterol in the plasmalemma of astrocytes, but not in fibroblasts nor in neuronal cells. This alteration of membrane structure may modulate a host of processes that synergistically contribute to ketamine's rapid and prominent antidepressant action.
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Affiliation(s)
- Matjaž Stenovec
- Celica BIOMEDICAL, Tehnološki Park 24, 1000, Ljubljana, Slovenia; Laboratory of Neuroendocrinology-Molecular Cell Physiology, Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, Zaloška 4, 1000, Ljubljana, Slovenia.
| | - Baoman Li
- Practical Teaching Centre, School of Forensic Medicine, China Medical University, Shenyang, People's Republic of China; Department of Poison Analysis, School of Forensic Medicine, China Medical University, Shenyang, China.
| | - Alexei Verkhratsky
- Celica BIOMEDICAL, Tehnološki Park 24, 1000, Ljubljana, Slovenia; Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, M13 9PT, UK; Achucarro Center for Neuroscience, IKERBASQUE, 48011, Bilbao, Spain.
| | - Robert Zorec
- Celica BIOMEDICAL, Tehnološki Park 24, 1000, Ljubljana, Slovenia; Laboratory of Neuroendocrinology-Molecular Cell Physiology, Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, Zaloška 4, 1000, Ljubljana, Slovenia.
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13
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Chakraborty S, Tripathi SJ, Srikumar B, Raju T, Shankaranarayana Rao B. N-acetyl cysteine ameliorates depression-induced cognitive deficits by restoring the volumes of hippocampal subfields and associated neurochemical changes. Neurochem Int 2020; 132:104605. [DOI: 10.1016/j.neuint.2019.104605] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 11/11/2019] [Accepted: 11/15/2019] [Indexed: 12/14/2022]
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14
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From bed to bench side: Reverse translation to optimize neuromodulation for mood disorders. Proc Natl Acad Sci U S A 2019; 116:26288-26296. [PMID: 31871143 DOI: 10.1073/pnas.1902287116] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The advent of neuroimaging has provided foundational insights into the neural basis of psychiatric conditions, such as major depression. Across countless studies, dysfunction has been localized to distinct parts of the limbic system. Specific knowledge about affected locations has led to the development of circuit modulation therapies to correct dysfunction, notably deep brain stimulation (DBS). This and other emerging neuromodulation approaches have shown great promise, but their refinement has been slow and fundamental questions about their mechanisms of action remain. Here, we argue that their continued development requires reverse translation to animal models with close homology to humans, namely, nonhuman primates. With a particular focus on DBS approaches for depression, we highlight the parts of the brain that have been targeted by neuromodulation in humans, their efficacy, and why nonhuman primates are the most suitable model in which to conduct their refinement. We finish by highlighting key gaps in our knowledge that need to be filled to allow more rapid progress toward effective therapies in patients for whom all other treatment attempts have failed.
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15
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Nguyen L, Kakeda S, Katsuki A, Sugimoto K, Otsuka Y, Ueda I, Igata R, Watanabe K, Kishi T, Iwata N, Korogi Y, Yoshimura R. Relationship between VEGF-related gene polymorphisms and brain morphology in treatment-naïve patients with first-episode major depressive disorder. Eur Arch Psychiatry Clin Neurosci 2019; 269:785-794. [PMID: 30406404 DOI: 10.1007/s00406-018-0953-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 10/24/2018] [Indexed: 01/17/2023]
Abstract
Vascular endothelial growth factor (VEGF) is involved in the development of major depressive disorder (MDD). Recently, a genome-wide association study has revealed that four VEGF-related single nucleotide polymorphisms (SNPs) (i.e., rs4416670, rs6921438, rs6993770 and rs10738760) were independently associated with circulating VEGF levels. The current study investigated the relationship between brain volume and these four SNPs in first-episode drug-naïve MDD patients. A total of 38 first-episode drug-naïve MDD patients and 39 healthy subjects (HS) were recruited and underwent high-resolution T1-weighted imaging. Blood samples were collected from all the participants for serum VEGF assays and VEGF-related SNPs genotyping. Genotype-diagnosis interactions related to whole-brain cortical thickness and hippocampal subfield volumes were evaluated for the four SNPs. The results revealed a genotype-diagnosis interaction only for rs6921438 (i.e., the MDD patients and HS with the G/G genotype versus the MDD patients and HS with A-carrier genotype) in the subiculum of the left hippocampus (p < 0.05), and not the other SNPs. There was a volume reduction in the left subiculum of G/G genotype patients compared with the other groups. The "hypochondriasis" scores of the HAMD-17 scale were significantly higher in the G/G genotype patients than the A-carrier genotype patients. The association was observed between VEGF-related SNP rs6921438 and subiculum atrophy in first-episode drug-naïve MDD patients.
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Affiliation(s)
- LeHoa Nguyen
- Department of Psychiatry, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 8078555, Japan
- School of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
| | - Shingo Kakeda
- Department of Radiology, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Asuka Katsuki
- Department of Psychiatry, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 8078555, Japan
| | - Koichiro Sugimoto
- Department of Radiology, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yuka Otsuka
- Department of Psychiatry, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 8078555, Japan
| | - Issei Ueda
- Department of Radiology, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Ryohei Igata
- Department of Psychiatry, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 8078555, Japan
| | - Keita Watanabe
- Department of Radiology, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Taro Kishi
- Department of Psychiatry, Fujita Health University School of Medicine, Nagoya, Japan
| | - Nakao Iwata
- Department of Psychiatry, Fujita Health University School of Medicine, Nagoya, Japan
| | - Yukunori Korogi
- Department of Radiology, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Reiji Yoshimura
- Department of Psychiatry, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 8078555, Japan.
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16
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Treatment resistance in major depression is correlated with increased plasma levels of neurofilament light protein reflecting axonal damage. Med Hypotheses 2019; 127:159-161. [DOI: 10.1016/j.mehy.2019.03.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 02/19/2019] [Accepted: 03/21/2019] [Indexed: 12/28/2022]
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17
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Affiliation(s)
- Paul R. Albert
- From the Department of Neuroscience, Ottawa Hospital Research Institute, UOttawa Brain and Mind Research Institute, Ottawa, Ont., Canada
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18
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Hartopp N, Wright P, Ray NJ, Evans TE, Metzler-Baddeley C, Aggleton JP, O'Sullivan MJ. A Key Role for Subiculum-Fornix Connectivity in Recollection in Older Age. Front Syst Neurosci 2019; 12:70. [PMID: 30687030 PMCID: PMC6335321 DOI: 10.3389/fnsys.2018.00070] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 12/17/2018] [Indexed: 11/13/2022] Open
Abstract
Individual differences in memory during aging are associated with the microstructure of the fornix, a bidirectional tract connecting the hippocampus with the diencephalon, basal forebrain and cortex. To investigate the origin of alterations in fornix microstructure, measurement of hippocampal subfield volumes was combined with diffusion MRI and cognitive evaluation in a new sample of 31 healthy human participants aged 50-89 years. The fornix, uncinate and parahippocampal cingulum were reconstructed using diffusion MRI tractography. Episodic memory was assessed with free and cued verbal recall, visual recognition and paired associate learning tests. Recall performance was associated with fornix microstructure and hippocampal subfield volumes. Subiculum and CA1 volumes remained positively associated with fornix microstructure when controlling for other volumes. Subiculum volume was also associated with fornix microstructure independent of age. Regression analyses showed that subiculum-fornix associations explained more variation in recall than that of CA1-fornix associations. In a multivariable regression model, age and subiculum volume were independent predictors of free recall whilst fornix microstructure and CA1 volume were not. These results suggest that age-related changes in a network that includes the subiculum and fornix are important in cognitive change in healthy aging. These results match anatomical predictions concerning the importance of hippocampal - diencephalic projections for memory.
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Affiliation(s)
- Naomi Hartopp
- Division of Neuroscience, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, United Kingdom
| | - Paul Wright
- Division of Neuroscience, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, United Kingdom
| | - Nicola J Ray
- Department of Psychology, Manchester Metropolitan University, Manchester, United Kingdom
| | - Tavia E Evans
- Division of Neuroscience, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, United Kingdom.,Department of Epidemiology, Erasmus Medical Center, Rotterdam, Netherlands
| | | | - John P Aggleton
- School of Psychology, Cardiff University, Cardiff, United Kingdom
| | - Michael J O'Sullivan
- Division of Neuroscience, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, United Kingdom.,School of Psychology, Cardiff University, Cardiff, United Kingdom.,Centre for Clinical Research, University of Queensland, Brisbane, QLD, Australia.,Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia
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19
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Otsuka Y, Kakeda S, Sugimoto K, Katsuki A, Nguyen LH, Igata R, Watanabe K, Ueda I, Kishi T, Iwata N, Korogi Y, Yoshimura R. COMT polymorphism regulates the hippocampal subfield volumes in first-episode, drug-naive patients with major depressive disorder. Neuropsychiatr Dis Treat 2019; 15:1537-1545. [PMID: 31239688 PMCID: PMC6560253 DOI: 10.2147/ndt.s199598] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 04/29/2019] [Indexed: 12/11/2022] Open
Abstract
Purpose: Compared with healthy subjects (HS), patients with major depressive disorder (MDD) exhibit volume differences that affect the volume changes in several areas such as the limbic, cortical, subcortical, and white matter. Catechol-O-methyltransferase (COMT) is a methylation enzyme that catalyzes endogenous catecholamines. The Val158Met polymorphism of COMT has been reported to affect the dopamine (DA) levels, which plays an important role in psychiatric diseases. However, the relationships among both DA levels, COMT genotype, and brain morphology are complicated and controversial. In previous studies that investigated the hippocampal subfields, the greatest brain abnormalities in MDD patients were observed in Cornu Ammonis (CA)1 and the subiculum, followed by that in CA2-3. We have prospectively demonstrated the relationship between the single-nucleotide polymorphism of the Val158Met COMT gene (rs4680) and the hippocampal subfields in drug-naive MDD patients. Patients and methods: In this study, we compared 27 MDD patients and 42 HS who were divided into groups based on their COMT genotype. The effects of the diagnosis, genotype, and genotype-diagnosis interaction related to CA1 and the subiculum volumes, as well as the whole-brain cortical thickness, were evaluated by performing a FreeSurfer statistical analysis of high-resolution magnetic resonance imaging (MRI) findings. Results: The results revealed that there was a statistically significant interaction between the effects of diagnosis and genotype on the right subiculum (a component of the hippocampus). Conclusion: This Val158Met COMT polymorphism may influence the subiculum volume in drug-naive, first-episode MDD patients.
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Affiliation(s)
- Yuka Otsuka
- Department of Psychiatry, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Shingo Kakeda
- Department of Radiology, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Koichiro Sugimoto
- Department of Radiology, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Asuka Katsuki
- Department of Psychiatry, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Le Hoa Nguyen
- Department of Psychiatry, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Ryohei Igata
- Department of Psychiatry, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Keita Watanabe
- Department of Radiology, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Issei Ueda
- Department of Radiology, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Taro Kishi
- Department of Psychiatry, Fujita Health University School of Medicine, Toyoake, Japan
| | - Nakao Iwata
- Department of Psychiatry, Fujita Health University School of Medicine, Toyoake, Japan
| | - Yukunori Korogi
- Department of Radiology, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Reiji Yoshimura
- Department of Psychiatry, University of Occupational and Environmental Health, Kitakyushu, Japan
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20
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Na KS, Won E, Kang J, Kim A, Choi S, Kim YK, Lee MS, Ham BJ. Interaction effects of oxytocin receptor gene polymorphism and depression on hippocampal volume. Psychiatry Res Neuroimaging 2018; 282:18-23. [PMID: 30384146 DOI: 10.1016/j.pscychresns.2018.10.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 10/20/2018] [Accepted: 10/20/2018] [Indexed: 11/28/2022]
Abstract
Many studies have revealed that the oxytocin receptor gene (OXTR) is associated with emotional salience and depression among females. Hippocampus is closely associated with the pathophysiology of major depressive disorder (MDD). However, little is known of the interaction effects of OXTR and MDD on hippocampal volume. We sought to investigate the interaction effects of OXTR (rs53576) allelic variants and MDD on hippocampal volumes which also including subfield volumes. The OXTR rs53576 genotype groups were categorized as minor G allele carriers and A allele homozygotes. A total of 47 female patients with depression and 30 healthy females were included in this study. There were significant interactions between OXTR allele type and diagnosis of MDD on the 7 hippocampal subfield volumes, such as left presubiculum, left subiculum, left molecular, right cornus ammonis 1, right granule cells in the molecular layer of the dentate gyrus, right molecular layer, and right subiculum. There were no differences in the hippocampal volumes between MDD vs healthy controls or OXTR A vs G alleles. Our results demonstrate the importance of the interactions between OXTR and MDD on hippocampal volume. Future studies with large sample size should expand those interactions in the whole brain volumes.
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Affiliation(s)
- Kyoung-Sae Na
- Department of Psychiatry, Gachon University College of Medicine, Gil Medical Center, Incheon, Republic of Korea
| | - Eunsoo Won
- Department of Psychiatry, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - June Kang
- Department of Biomedical Science, Korea University, Seoul, Republic of Korea
| | - Aram Kim
- Department of Biomedical Science, Korea University, Seoul, Republic of Korea
| | - Sunyoung Choi
- Clinical Research Division, Korean Institute of Oriental Medicine, Daejeon, Republic of Korea
| | - Yong-Ku Kim
- Department of Psychiatry, Korea University Ansan Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Min-Soo Lee
- Department of Psychiatry, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Byung-Joo Ham
- Department of Psychiatry, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea.
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21
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Noda Y, Zomorrodi R, Daskalakis ZJ, Blumberger DM, Nakamura M. Enhanced theta-gamma coupling associated with hippocampal volume increase following high-frequency left prefrontal repetitive transcranial magnetic stimulation in patients with major depression. Int J Psychophysiol 2018; 133:169-174. [PMID: 30318052 DOI: 10.1016/j.ijpsycho.2018.07.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Revised: 07/03/2018] [Accepted: 07/05/2018] [Indexed: 12/21/2022]
Abstract
The underlying mechanism of repetitive transcranial magnetic stimulation (rTMS) effects on cognition has not been fully examined. Previously, we have reported the left hippocampal volume increase and theta-gamma coupling (TGC) enhancement associated with working memory improvement following rTMS in depression. This study was aimed to examine whether there is a structure-function relationship in hippocampal neuroplasticity induced by prefrontal rTMS. Thirty-one patients with major depression underwent longitudinal MRI scans and resting-state EEG recordings with the 10-20 system using averaged ear-lobes reference, following 10 sessions of high-frequency rTMS over the left dorsolateral prefrontal cortex. Pearson's correlation analyses were applied for the longitudinal changes among the left and right hippocampal volumes as measured by manual volumetry, theta and gamma spectral powers, and TGC as measured by resting-state EEG. The analyses demonstrated that the left hippocampus volume increases correlated with TGC increases at the left central area (r = 0.576, p = 0.001, N = 31), whereas no significant correlations were observed among changes of right hippocampal volume, right central TGC, bilateral gamma or theta powers. These finding suggests structure-function relationship in rTMS-induced neuroplastic changes mediated through the hippocampus and prefrontal network at the stimulated side. Therefore, high-frequency prefrontal rTMS may exert its cognitive effect through the hippocampal structural-functional neuroplasticity.
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Affiliation(s)
- Yoshihiro Noda
- Department of Neuropsychiatry, Keio University School of Medicine, Japan.
| | - Reza Zomorrodi
- Temerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, Department of Psychiatry, University of Toronto, Canada
| | - Zafiris J Daskalakis
- Temerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, Department of Psychiatry, University of Toronto, Canada
| | - Daniel M Blumberger
- Temerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, Department of Psychiatry, University of Toronto, Canada
| | - Motoaki Nakamura
- Medical Institute of Developmental Disabilities Research, Showa University, Japan; Laboratory of Neuromodulation, Kanagawa Psychiatric Center, Japan
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22
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Durmusoglu E, Ugurlu O, Akan S, Simsek F, Kizilates G, Kitis O, Ozkul BA, Eker C, Coburn KL, Gonul AS. Hippocampal shape alterations in healthy young women with familial risk for unipolar depression. Compr Psychiatry 2018; 82:7-13. [PMID: 29367060 DOI: 10.1016/j.comppsych.2018.01.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 12/30/2017] [Accepted: 01/04/2018] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Although reduced hippocampal volume (HCV) is a common finding in depression, it is unclear whether the structural alterations leading to reduction of HCV are pre-existing risk factors before the onset of clinical symptoms or a cumulative process that begins with the onset of clinical symptoms. The aim of the present study was to understand the anatomical status of the hippocampus prior to the clinical symptoms in subjects with high familial risk for depression. METHODS Twenty-seven young women (mean age: 22.3 ± 2.1 years) who were at high risk for familial unipolar depression and 26 age- and gender-matched healthy controls (mean age: 22.1 ± 2.1 years) with low familial risk for depression were included in the study. Total hippocampal volumes were measured by manual tracing. For 3D shape differences, the spherical harmonic basis functions (SPHARM) software was used. The segmented images were parameterized, and the point-to-point based group difference was compared by the Hotelling's T-squared test with total brain volume and Beck Depression Scale as covariates. RESULTS Although there was no difference in overall HCVs, shape analyses revealed a contracted area on the Cornu Ammonis (CA) 1 region of the right hippocampus head in the high-risk group compared to the low-risk group. Cross-sectional design and small sample size, including only females, were the main limitations of this study. CONCLUSION This study with shape analyses provided data suggesting that local structural hippocampal alterations in the CA1 region might be associated with depression vulnerability in women at high risk.
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Affiliation(s)
- Ece Durmusoglu
- SoCAT Lab Department of Psychiatry, School of Medicine Ege University, Izmir, Turkey
| | - Onur Ugurlu
- SoCAT Lab Department of Psychiatry, School of Medicine Ege University, Izmir, Turkey; Ege University, Faculty of Science, Department of Mathematics, Bornova, Izmir, Turkey
| | - Sebnem Akan
- SoCAT Lab Department of Psychiatry, School of Medicine Ege University, Izmir, Turkey; Department of Neuroscience, Institute of Health Sciences, Ege University, Izmir, Turkey
| | - Fatma Simsek
- SoCAT Lab Department of Psychiatry, School of Medicine Ege University, Izmir, Turkey; Department of Psychosis Studies, Institute of Psychiatry, Kings' College London, UK
| | - Gozde Kizilates
- SoCAT Lab Department of Psychiatry, School of Medicine Ege University, Izmir, Turkey; Ege University, Faculty of Science, Department of Mathematics, Bornova, Izmir, Turkey
| | - Omer Kitis
- SoCAT Lab Department of Psychiatry, School of Medicine Ege University, Izmir, Turkey; Department of Neuroradiology, School of Medicine Ege University, Izmir, Turkey
| | - Burcu Aksoy Ozkul
- SoCAT Lab Department of Psychiatry, School of Medicine Ege University, Izmir, Turkey; Department of Neuroscience, Institute of Health Sciences, Ege University, Izmir, Turkey; Department of Psychiatric Nursing, Faculty of Nursing, Dokuz Eylul University, Izmir, Turkey
| | - Cagdas Eker
- SoCAT Lab Department of Psychiatry, School of Medicine Ege University, Izmir, Turkey; Affective Disorders Unit, Department of Psychiatry, School of Medicine, Ege University, Izmir, Turkey; CUBIT Lab & Department of Psychiatry, School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Kerry L Coburn
- Mercer University School of Medicine, Department of Psychiatry and Behavioral Sciences, Macon, GA, USA
| | - Ali Saffet Gonul
- SoCAT Lab Department of Psychiatry, School of Medicine Ege University, Izmir, Turkey; Mercer University School of Medicine, Department of Psychiatry and Behavioral Sciences, Macon, GA, USA.
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23
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Beaujoin J, Palomero-Gallagher N, Boumezbeur F, Axer M, Bernard J, Poupon F, Schmitz D, Mangin JF, Poupon C. Post-mortem inference of the human hippocampal connectivity and microstructure using ultra-high field diffusion MRI at 11.7 T. Brain Struct Funct 2018; 223:2157-2179. [PMID: 29387938 PMCID: PMC5968081 DOI: 10.1007/s00429-018-1617-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 01/22/2018] [Indexed: 12/11/2022]
Abstract
The human hippocampus plays a key role in memory management and is one of the first structures affected by Alzheimer's disease. Ultra-high magnetic resonance imaging provides access to its inner structure in vivo. However, gradient limitations on clinical systems hinder access to its inner connectivity and microstructure. A major target of this paper is the demonstration of diffusion MRI potential, using ultra-high field (11.7 T) and strong gradients (750 mT/m), to reveal the extra- and intra-hippocampal connectivity in addition to its microstructure. To this purpose, a multiple-shell diffusion-weighted acquisition protocol was developed to reach an ultra-high spatio-angular resolution with a good signal-to-noise ratio. The MRI data set was analyzed using analytical Q-Ball Imaging, Diffusion Tensor Imaging (DTI), and Neurite Orientation Dispersion and Density Imaging models. High Angular Resolution Diffusion Imaging estimates allowed us to obtain an accurate tractography resolving more complex fiber architecture than DTI models, and subsequently provided a map of the cross-regional connectivity. The neurite density was akin to that found in the histological literature, revealing the three hippocampal layers. Moreover, a gradient of connectivity and neurite density was observed between the anterior and the posterior part of the hippocampus. These results demonstrate that ex vivo ultra-high field/ultra-high gradients diffusion-weighted MRI allows the mapping of the inner connectivity of the human hippocampus, its microstructure, and to accurately reconstruct elements of the polysynaptic intra-hippocampal pathway using fiber tractography techniques at very high spatial/angular resolutions.
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Affiliation(s)
- Justine Beaujoin
- CEA NeuroSpin/UNIRS, Gif-sur-Yvette, France.
- Université Paris-Saclay, Orsay, France.
- France Life Imaging, Orsay, France.
| | - Nicola Palomero-Gallagher
- Forschungszentrum Jülich, INM-1, Jülich, Germany
- Department of Psychiatry, Psychotherapy and Psychosomatics, Medical Faculty, RWTH Aachen, Aachen, Germany
| | - Fawzi Boumezbeur
- CEA NeuroSpin/UNIRS, Gif-sur-Yvette, France
- Université Paris-Saclay, Orsay, France
- France Life Imaging, Orsay, France
| | - Markus Axer
- Forschungszentrum Jülich, INM-1, Jülich, Germany
| | - Jeremy Bernard
- CEA NeuroSpin/UNIRS, Gif-sur-Yvette, France
- Université Paris-Saclay, Orsay, France
- France Life Imaging, Orsay, France
| | - Fabrice Poupon
- Université Paris-Saclay, Orsay, France
- France Life Imaging, Orsay, France
- CEA NeuroSpin/UNATI, Gif-sur-Yvette, France
| | | | - Jean-François Mangin
- Université Paris-Saclay, Orsay, France
- France Life Imaging, Orsay, France
- CEA NeuroSpin/UNATI, Gif-sur-Yvette, France
- CATI Neuroimaging Platform
| | - Cyril Poupon
- CEA NeuroSpin/UNIRS, Gif-sur-Yvette, France
- Université Paris-Saclay, Orsay, France
- France Life Imaging, Orsay, France
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24
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Laman-Maharg A, Trainor BC. Stress, sex, and motivated behaviors. J Neurosci Res 2017; 95:83-92. [PMID: 27870436 DOI: 10.1002/jnr.23815] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Revised: 06/01/2016] [Accepted: 06/13/2016] [Indexed: 01/01/2023]
Abstract
Stress is a major risk factor for development of psychiatric disorders such as depression and development of substance use disorder. Although there are important sex differences in the prevalence of these disorders, most preclinical models used to study stress-induced disorders have used males only. Social defeat stress is a commonly used method to induce stress in an ethologically relevant way but has only recently begun to be used in female rodents. Using these new female models, recent studies have examined how social defeat stress affects males and females differently at the behavioral, circuit, and molecular levels. This Mini-Review discusses sex differences in the effects of social defeat stress on social behavior and drug-seeking behavior as well as its impact on the mesolimbic dopamine system and the highly connected region of the bed nucleus of the stria terminalis. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Abigail Laman-Maharg
- Neuroscience Graduate Group, University of California, Davis, Davis, California.,Department of Psychology, University of California, Davis, Davis, California.,Center for Neuroscience, University of California, Davis, Davis, California
| | - Brian C Trainor
- Neuroscience Graduate Group, University of California, Davis, Davis, California.,Department of Psychology, University of California, Davis, Davis, California.,Center for Neuroscience, University of California, Davis, Davis, California
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25
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Pelkey KA, Chittajallu R, Craig MT, Tricoire L, Wester JC, McBain CJ. Hippocampal GABAergic Inhibitory Interneurons. Physiol Rev 2017; 97:1619-1747. [PMID: 28954853 DOI: 10.1152/physrev.00007.2017] [Citation(s) in RCA: 482] [Impact Index Per Article: 68.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 05/16/2017] [Accepted: 05/26/2017] [Indexed: 12/11/2022] Open
Abstract
In the hippocampus GABAergic local circuit inhibitory interneurons represent only ~10-15% of the total neuronal population; however, their remarkable anatomical and physiological diversity allows them to regulate virtually all aspects of cellular and circuit function. Here we provide an overview of the current state of the field of interneuron research, focusing largely on the hippocampus. We discuss recent advances related to the various cell types, including their development and maturation, expression of subtype-specific voltage- and ligand-gated channels, and their roles in network oscillations. We also discuss recent technological advances and approaches that have permitted high-resolution, subtype-specific examination of their roles in numerous neural circuit disorders and the emerging therapeutic strategies to ameliorate such pathophysiological conditions. The ultimate goal of this review is not only to provide a touchstone for the current state of the field, but to help pave the way for future research by highlighting where gaps in our knowledge exist and how a complete appreciation of their roles will aid in future therapeutic strategies.
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Affiliation(s)
- Kenneth A Pelkey
- Porter Neuroscience Center, Eunice Kennedy-Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, Hatherly Laboratories, University of Exeter, Exeter, United Kingdom; and Sorbonne Universités, UPMC University of Paris, INSERM, CNRS, Neurosciences Paris Seine-Institut de Biologie Paris Seine, Paris, France
| | - Ramesh Chittajallu
- Porter Neuroscience Center, Eunice Kennedy-Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, Hatherly Laboratories, University of Exeter, Exeter, United Kingdom; and Sorbonne Universités, UPMC University of Paris, INSERM, CNRS, Neurosciences Paris Seine-Institut de Biologie Paris Seine, Paris, France
| | - Michael T Craig
- Porter Neuroscience Center, Eunice Kennedy-Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, Hatherly Laboratories, University of Exeter, Exeter, United Kingdom; and Sorbonne Universités, UPMC University of Paris, INSERM, CNRS, Neurosciences Paris Seine-Institut de Biologie Paris Seine, Paris, France
| | - Ludovic Tricoire
- Porter Neuroscience Center, Eunice Kennedy-Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, Hatherly Laboratories, University of Exeter, Exeter, United Kingdom; and Sorbonne Universités, UPMC University of Paris, INSERM, CNRS, Neurosciences Paris Seine-Institut de Biologie Paris Seine, Paris, France
| | - Jason C Wester
- Porter Neuroscience Center, Eunice Kennedy-Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, Hatherly Laboratories, University of Exeter, Exeter, United Kingdom; and Sorbonne Universités, UPMC University of Paris, INSERM, CNRS, Neurosciences Paris Seine-Institut de Biologie Paris Seine, Paris, France
| | - Chris J McBain
- Porter Neuroscience Center, Eunice Kennedy-Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, Hatherly Laboratories, University of Exeter, Exeter, United Kingdom; and Sorbonne Universités, UPMC University of Paris, INSERM, CNRS, Neurosciences Paris Seine-Institut de Biologie Paris Seine, Paris, France
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Xu LY, Xu FC, Liu C, Ji YF, Wu JM, Wang Y, Wang HB, Yu YQ. Relationship between cerebellar structure and emotional memory in depression. Brain Behav 2017; 7:e00738. [PMID: 28729943 PMCID: PMC5516611 DOI: 10.1002/brb3.738] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 04/13/2017] [Accepted: 04/19/2017] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND A few studies have been conducted on the relationship between cerebellar volume and emotional memory or clinical severity in major depressive disorder (MDD). In this study, we aimed to compare the volume and density of the cerebellar gray matter (GM) in patients with MDD and in healthy controls (HCs) and explore the association between these cerebellar parameters and measurements of emotional memory and clinical severity. METHOD Voxel-based morphometry (VBM) and Individual Brain Atlases using Statistical Parametric Mapping (IBASPM) were used to assess GM density and volume in the cerebellum, respectively, in patients with MDD and the HCs. Indicators of emotional memory performance were measured, including the hit rate (HR), rate of false alarm (FA), precision (Pr = HR - FA) and emotional memory enhancement [∆Pr = Pr(emotion) - Pr(neutral)] values. Beck Depression Inventory (BDI) scores were used to measure the severity of depression. RESULTS In the patients with MDD, the GM density was decreased in three cerebellar cortical regions and increased in three cerebellar cortical regions (p < .005). The GM volumes in eight cerebellar cortical regions were significantly smaller in the patients with MDD than in the HC subjects (p < .05). In the patients with MDD, the GM volume was correlated with the ∆Pr (p < .05) in two cerebellar cortical regions. The BDI scores were significantly correlated with the relative GM densities (p < .05) in 5 cerebellar cortical regions, and the GM volumes in 13 cerebellar cortical regions were correlated with the BDI scores in patients with MDD. CONCLUSIONS Emotional memory and the severity of depressive symptoms are associated with structural changes in both the posterior and anterior GM regions in the cerebellum in patients with MDD. These findings could be useful for improving our understanding of the neurobiological mechanisms underlying emotional memory and explaining the abnormalities of the neural correlates that are associated with MDD.
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Affiliation(s)
- Li-Yan Xu
- Department of Radiology The First Affiliated Hospital of Anhui Medical University Hefei China
| | - Fang-Cheng Xu
- Department of Neurology The First Affiliated Hospital of Anhui Medical University Hefei China
| | - Can Liu
- Department of Radiology The First Affiliated Hospital of Anhui Medical University Hefei China
| | - Yi-Fu Ji
- The Centre of Anhui Mental Health and The Fourth Hospital of Hefei Hefei China
| | - Jin-Min Wu
- Department of Radiology The First Affiliated Hospital of Anhui Medical University Hefei China
| | - Ying Wang
- Department of Radiology The First Affiliated Hospital of Anhui Medical University Hefei China
| | - Hai-Bao Wang
- Department of Radiology The First Affiliated Hospital of Anhui Medical University Hefei China
| | - Yong-Qiang Yu
- Department of Radiology The First Affiliated Hospital of Anhui Medical University Hefei China
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Watanabe R, Kakeda S, Watanabe K, Liu X, Katsuki A, Umeno-Nakano W, Hori H, Abe O, Yoshimura R, Korogi Y. Relationship between the hippocampal shape abnormality and serum cortisol levels in first-episode and drug-naïve major depressive disorder patients. Depress Anxiety 2017; 34:401-409. [PMID: 28129464 DOI: 10.1002/da.22604] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 10/29/2016] [Accepted: 12/28/2016] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND We aimed to investigate the relationship between the hippocampal shape deformations and the serum cortisol levels in first-episode and drug-naïve major depression disorder (MDD) patients. METHODS Thirty first-episode and drug-naïve MDD patients and 40 healthy subjects were recruited. High-resolution T1-weighted imaging and morning blood samples for cortisol measurement were obtained from all MDD patients and healthy subjects. In the hippocampal shape analysis, we compared the hippocampal shape between MDD patients and healthy subjects and evaluated the linear correlation between hippocampal shape deformations and the serum cortisol levels in MDD patients and healthy subjects. RESULTS MDD patients showed significant inward deformations predominantly in the cornu ammonis (CA) 1 and subiculum in bilateral hippocampi compared to healthy subjects (false discovery rate (FDR) corrected, P < .05). Furthermore, in MDD patients, a significant linear correlation between inward deformations and high cortisol levels were found predominantly in the CA1 and subiculum, extending into the CA2-3 (FDR-corrected, P < .05), whereas no significant linear correlation was observed in healthy subjects. CONCLUSIONS The serum cortisol levels are therefore considered to be associated with hippocampal shape abnormalities in MDD.
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Affiliation(s)
- Rieko Watanabe
- Department of Radiology, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Shingo Kakeda
- Department of Radiology, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Keita Watanabe
- Department of Radiology, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Xiaodan Liu
- Department of Radiology, University of Occupational and Environmental Health, Fukuoka, Japan.,Medical imaging center, 1st Affiliated Hospital of Jinan University, Guangzhou, China
| | - Asuka Katsuki
- Department of Psychiatry, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Wakako Umeno-Nakano
- Department of Psychiatry, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Hikaru Hori
- Department of Psychiatry, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Osamu Abe
- Department of Radiology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Reiji Yoshimura
- Department of Psychiatry, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Yukunori Korogi
- Department of Radiology, University of Occupational and Environmental Health, Fukuoka, Japan
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Wilkinson ST, Sanacora G, Bloch MH. Hippocampal volume changes following electroconvulsive therapy: a systematic review and meta-analysis. BIOLOGICAL PSYCHIATRY. COGNITIVE NEUROSCIENCE AND NEUROIMAGING 2017; 2:327-335. [PMID: 28989984 PMCID: PMC5627663 DOI: 10.1016/j.bpsc.2017.01.011] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Reduced hippocampal volume is one of the most consistent morphological findings in Major Depressive Disorder (MDD). Electroconvulsive therapy (ECT) is the most effective therapy for MDD, yet its mechanism of action remains poorly understood. Animal models show that ECT induces several neuroplastic processes, which lead to hippocampal volume increases. We conducted a meta-analysis of ECT studies in humans to investigate its effects on hippocampal volume. METHODS PubMed was searched for studies examining hippocampal volume before and after ECT. A random-effects model was used for meta-analysis with standardized mean difference (SMD) of the change in hippocampal volume before and after ECT as the primary outcome. Nine studies involving 174 participants were included. RESULTS Total hippocampal volumes increased significantly following ECT compared to pre-treatment values (SMD=1.10; 95% CI 0.80-1.39; z=7.34; p<0.001; k=9). Both right (SMD=1.01; 95% CI 0.72-1.30; z=6.76; p<0.001; k=7) and left (SMD=0.87; 95% CI 0.51-1.23; z=4.69; p<0.001; k=7) hippocampal volumes were also similarly increased significantly following ECT. We demonstrated no correlation between improvement in depression symptoms with ECT and change in total hippocampal volume (beta=-1.28, 95% CI -4.51-1.95, z=-0.78, p=0.44). CONCLUSION We demonstrate fairly consistent increases in hippocampal volume bilaterally following ECT treatment. The relationship among these volumetric changes and clinical improvement and cognitive side effects of ECT should be explored by larger, multisite studies with harmonized imaging methods.
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Affiliation(s)
- Samuel T. Wilkinson
- Department of Psychiatry, Yale School of Medicine, New Haven, CT 06511
- Connecticut Mental Health Center, New Haven, CT 06519
| | - Gerard Sanacora
- Department of Psychiatry, Yale School of Medicine, New Haven, CT 06511
- Connecticut Mental Health Center, New Haven, CT 06519
| | - Michael H. Bloch
- Department of Psychiatry, Yale School of Medicine, New Haven, CT 06511
- Connecticut Mental Health Center, New Haven, CT 06519
- Yale Child Study Center, Yale School of Medicine, New Haven, CT 06519
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Ardalan M, Rafati AH, Nyengaard JR, Wegener G. Rapid antidepressant effect of ketamine correlates with astroglial plasticity in the hippocampus. Br J Pharmacol 2017; 174:483-492. [PMID: 28087979 PMCID: PMC5323512 DOI: 10.1111/bph.13714] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 11/24/2016] [Accepted: 01/08/2017] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND AND PURPOSE Astroglia contribute to the pathophysiology of major depression and antidepressant drugs act by modulating synaptic plasticity; therefore, the present study investigated whether the fast antidepressant action of ketamine is reflected in a rapid alteration of the astrocytes' morphology in a genetic animal model of depression. EXPERIMENTAL APPROACH S-Ketamine (15 mg·kg-1 ) or saline was administered as a single injection to Flinders Line (FSL/ FRL) rats. Twenty-four hours after the treatment, perfusion fixation was carried out and the morphology of glial fibrillary acid protein (GFAP)-positive astrocytes in the CA1 stratum radiatum (CA1.SR) and the molecular layer of the dentate gyrus (GCL) of the hippocampus was investigated by applying stereological techniques and analysis with Imaris software. The depressive-like behaviour of animals was also evaluated using forced swim test. KEY RESULTS FSL rats treated with ketamine exhibited a significant reduction in immobility time in comparison with the FSL-vehicle group. The volumes of the hippocampal CA1.SR and GCL regions were significantly increased 1 day after ketamine treatment in the FSL rats. The size of astrocytes in the ketamine-treated FSL rats was larger than those in the FSL-vehicle group. Additionally, the number and length of the astrocytic processes in the CA1.SR region were significantly increased 1 day following ketamine treatment. CONCLUSIONS AND IMPLICATIONS Our results support the hypothesis that astroglial atrophy contributes to the pathophysiology of depression and a morphological modification of astrocytes could be one mechanism by which ketamine rapidly improves depressive behaviour.
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Affiliation(s)
- Maryam Ardalan
- Translational Neuropsychiatry Unit, Department of Clinical MedicineAarhus University HospitalRisskovDenmark
| | - Ali H. Rafati
- Translational Neuropsychiatry Unit, Department of Clinical MedicineAarhus University HospitalRisskovDenmark
- Center for Stochastic Geometry and Advanced BioimagingAarhus UniversityAarhusDenmark
| | - Jens R. Nyengaard
- Stereology and Electron Microscopy Laboratory, Department of Clinical MedicineAarhus University HospitalAarhusDenmark
- Center for Stochastic Geometry and Advanced BioimagingAarhus UniversityAarhusDenmark
| | - Gregers Wegener
- Translational Neuropsychiatry Unit, Department of Clinical MedicineAarhus University HospitalRisskovDenmark
- Pharmaceutical Research Center of Excellence, School of Pharmacy (Pharmacology)North‐West UniversityPotchefstroomSouth Africa
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Shively CA, Silverstein-Metzler M, Justice J, Willard SL. The impact of treatment with selective serotonin reuptake inhibitors on primate cardiovascular disease, behavior, and neuroanatomy. Neurosci Biobehav Rev 2016; 74:433-443. [PMID: 27590831 DOI: 10.1016/j.neubiorev.2016.08.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Revised: 08/12/2016] [Accepted: 08/29/2016] [Indexed: 11/26/2022]
Abstract
Selective serotonin reuptake inhibitor (SSRI) use is ubiquitous because they are widely prescribed for a number of disorders in addition to depression. Depression increases the risk of coronary heart disease (CHD). Hence, treating depression with SSRIs could reduce CHD risk. However, the effects of long term antidepressant treatment on CHD risk, as well as other aspects of health, remain poorly understood. Thus, we undertook an investigation of multisystem effects of SSRI treatment with a physiologically relevant dose in middle-aged adult female cynomolgus monkeys, a primate species shown to be a useful model of both depression and coronary and carotid artery atherosclerosis. Sertraline had no effect on depressive behavior, reduced anxious behavior, increased affiliation, reduced aggression, changed serotonin neurotransmission and volumes of neural areas critical to mood disorders, and exacerbated coronary and carotid atherosclerosis. These data suggest that a conservative approach to prescribing SSRIs for cardiovascular or other disorders for long periods may be warranted, and that further study is critical given the widespread use of these medications.
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Affiliation(s)
- Carol A Shively
- Department of Pathology, Wake Forest School of Medicine, United States.
| | | | - Jamie Justice
- Department of Internal Medicine - Geriatrics, J. Paul Sticht Center on Aging, Wake Forest School of Medicine, United States
| | - Stephanie L Willard
- Center for Neurobiology and Behavior, University of Pennsylvania, United States
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31
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Kalidindi A, Kelly SD, Singleton KS, Guzman D, Merrill L, Willard SL, Shively CA, Neigh GN. Reduced marker of vascularization in the anterior hippocampus in a female monkey model of depression. Physiol Behav 2016; 172:12-15. [PMID: 27423324 DOI: 10.1016/j.physbeh.2016.07.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 06/30/2016] [Accepted: 07/11/2016] [Indexed: 01/04/2023]
Abstract
Depression is a common and debilitating mood disorder that impacts women more often than men. The mechanisms that result in depressive behaviors are not fully understood; however, the hippocampus has been noted as a key structure in the pathophysiology of depression. In addition to neural implications of depression, the cardiovascular system is impacted. Although not as commonly considered, the cerebrovasculature is critical to brain function, impacted by environmental stimuli, and is capable of altering neural function and thereby behavior. In the current study, we assessed the relationship between depressive behavior and a marker of vascularization of the hippocampus in adult female cynomolgus macaques (Macaca fascicularis). Similar to previously noted impacts on neuropil and glia, the depressed phenotype predicts a reduction in a marker of vascular length in the anterior hippocampus. These data reinforce the growing recognition of the effects of depression on vasculature and support further consideration of vascular endpoints in studies aimed at the elucidation of the mechanisms underlying depression.
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Affiliation(s)
| | - Sean D Kelly
- Department of Physiology, Emory University, Atlanta, GA, USA
| | - Kaela S Singleton
- Neuroscience and Behavioral Biology, Agnes Scott College, Decatur, GA, USA
| | - Dora Guzman
- Department of Psychiatry & Behavioral Science, Emory University, Atlanta, GA, USA
| | - Liana Merrill
- Department of Physiology, Emory University, Atlanta, GA, USA
| | - Stephanie L Willard
- Department of Pathology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Carol A Shively
- Department of Pathology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Gretchen N Neigh
- Department of Physiology, Emory University, Atlanta, GA, USA; Department of Psychiatry & Behavioral Science, Emory University, Atlanta, GA, USA.
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32
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Gormley S, Rouine J, McIntosh A, Kerskens C, Harkin A. Glial fibrillary acidic protein (GFAP) immunoreactivity correlates with cortical perfusion parameters determined by bolus tracking arterial spin labelling (bt-ASL) magnetic resonance (MR) imaging in the Wistar Kyoto rat. Physiol Behav 2016; 160:66-79. [PMID: 27068181 DOI: 10.1016/j.physbeh.2016.04.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 03/21/2016] [Accepted: 04/06/2016] [Indexed: 12/14/2022]
Abstract
Alterations in astrocyte number and function have been implicated in the pathophysiology of a number of psychiatric disorders. The development of magnetic resonance imaging (MRI) as a tool in the animal laboratory has enabled an investigation of the relationship between pathological and neuroimaging markers in animal models. However the physiological processes which underlie these markers and their role in mediating behavioural deficits is still poorly understood. Rodent models have provided us with important insights into physiological and cellular mechanisms which may mediate anxiety and depression-related behaviours. The Wistar-Kyoto (WKY) rat is a strain which endogenously expresses highly anxious and depressive-like behaviours and has previously been reported to exhibit alterations in immunoreactivity for the astrocytic marker glial fibrillary acidic protein (GFAP) in brain sub-regions relative to more stress resilient out-bred strains. Here we report that the depressive and anxiety-like behaviours exhibited by the WKY rat strain are associated with alterations in brain morphology including a decrease in hippocampal volume, coupled with reduced resting state frontal cortical perfusion as assessed by MR bolus tracking arterial spin labelling (bt-ASL) relative to the out-bred Wistar strain. Pre-limbic cortical GFAP immunoreactivity and astrocyte cell number were positively correlated with cortical blood perfusion in the WKY strain. These experiments provide a link between pathological and neuroimaging markers of aberrant astrocytic function and add validity to the WKY rat as a model for co-morbid anxiety and depression.
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Affiliation(s)
- Shane Gormley
- Neuropsychopharmacology Research Group, School of Pharmacy & Pharmaceutical Sciences, Dublin, Ireland.
| | - Jennifer Rouine
- Neuropsychopharmacology Research Group, School of Pharmacy & Pharmaceutical Sciences, Dublin, Ireland; Trinity College Institute of Neuroscience, Dublin, Ireland
| | | | | | - Andrew Harkin
- Neuropsychopharmacology Research Group, School of Pharmacy & Pharmaceutical Sciences, Dublin, Ireland; Trinity College Institute of Neuroscience, Dublin, Ireland.
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Duerden EG, Guo T, Dodbiba L, Chakravarty MM, Chau V, Poskitt KJ, Synnes A, Grunau RE, Miller SP. Midazolam dose correlates with abnormal hippocampal growth and neurodevelopmental outcome in preterm infants. Ann Neurol 2016; 79:548-59. [DOI: 10.1002/ana.24601] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 12/22/2015] [Accepted: 01/02/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Emma G. Duerden
- Department of Paediatrics; Hospital for Sick Children and University of Toronto; Toronto Ontario
| | - Ting Guo
- Department of Paediatrics; Hospital for Sick Children and University of Toronto; Toronto Ontario
| | - Lorin Dodbiba
- Department of Paediatrics; Hospital for Sick Children and University of Toronto; Toronto Ontario
| | - M. Mallar Chakravarty
- Cerebral Imaging Centre; Douglas Mental Health University Institute; Montreal Quebec
- Departments of Psychiatry and Biomedical Engineering; McGill University; Montreal Quebec
| | - Vann Chau
- Department of Paediatrics; Hospital for Sick Children and University of Toronto; Toronto Ontario
- University of Toronto; Toronto Ontario
| | - Kenneth J. Poskitt
- Department of Pediatrics; University of British Columbia and Children's & Women's Health Centre of British Columbia, and Child & Family Research Institute; Vancouver British Columbia Canada
| | - Anne Synnes
- Department of Pediatrics; University of British Columbia and Children's & Women's Health Centre of British Columbia, and Child & Family Research Institute; Vancouver British Columbia Canada
| | - Ruth E. Grunau
- Department of Pediatrics; University of British Columbia and Children's & Women's Health Centre of British Columbia, and Child & Family Research Institute; Vancouver British Columbia Canada
| | - Steven P. Miller
- Department of Paediatrics; Hospital for Sick Children and University of Toronto; Toronto Ontario
- University of Toronto; Toronto Ontario
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Cobb JA, O'Neill K, Milner J, Mahajan GJ, Lawrence TJ, May WL, Miguel-Hidalgo J, Rajkowska G, Stockmeier CA. Density of GFAP-immunoreactive astrocytes is decreased in left hippocampi in major depressive disorder. Neuroscience 2015; 316:209-20. [PMID: 26742791 DOI: 10.1016/j.neuroscience.2015.12.044] [Citation(s) in RCA: 159] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 12/14/2015] [Accepted: 12/23/2015] [Indexed: 12/15/2022]
Abstract
Neuroimaging and postmortem studies of subjects with major depressive disorder (MDD) reveal smaller hippocampal volume with lengthening duration of illness. Pathology in astrocytes may contribute significantly to this reduced volume and to the involvement of the hippocampus in MDD. Postmortem hippocampal tissues were collected from 17 subjects with MDD and 17 psychiatrically-normal control subjects. Sections from the body of the hippocampus were immunostained for glial fibrillary acidic protein (GFAP), a marker of intermediate filament protein expressed in astrocytes. The density of GFAP-immunoreactive astrocytes was measured in the hippocampus using 3-dimensional cell counting. Hippocampal subfields were also assessed for GFAP-immunoreactive area fraction. In CA1, there was a significant positive correlation between age and either density or area fraction in MDD. The density of astrocytes in the hilus, but not CA1 or CA2/3, was significantly decreased only in depressed subjects not taking an antidepressant drug, but not for depressed subjects taking an antidepressant drug. The area fraction of GFAP-immunoreactivity was significantly decreased in the dentate gyrus in women but not men with depression. In CA2/3, the area fraction of GFAP-immunoreactivity was inversely correlated with the duration of depression in suicide victims. Astrocyte contributions to neuronal function in the hilus may be compromised in depressed subjects not taking antidepressant medication. Due to the cross-sectional nature of the present study of postmortem brain tissue, it remains to be determined whether antidepressant drug treatment prevented a decrease in GFAP-immunoreactive astrocyte density or restored cell density to normal levels.
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Affiliation(s)
- J A Cobb
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - K O'Neill
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - J Milner
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - G J Mahajan
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - T J Lawrence
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - W L May
- School of Health Related Professions, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - J Miguel-Hidalgo
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - G Rajkowska
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - C A Stockmeier
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS 39216, USA; Department of Psychiatry, Case Western Reserve University, Cleveland, OH 44106, USA.
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Lee KM, Chiu KB, Didier PJ, Baker KC, MacLean AG. Naltrexone treatment reverses astrocyte atrophy and immune dysfunction in self-harming macaques. Brain Behav Immun 2015; 50:288-297. [PMID: 26191654 PMCID: PMC4631668 DOI: 10.1016/j.bbi.2015.07.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 06/30/2015] [Accepted: 07/16/2015] [Indexed: 01/19/2023] Open
Abstract
The role of glia in the development and treatment of behavioral abnormalities is understudied. Recent reports have observed glial activation in several disorders, including depression, autism spectrum disorders and self-injurious behaviors (SIB). In the current study, we examined SIB in the physiologically and anatomically relevant nonhuman primate (NHP) model. At the Tulane National Primate Research Center (TNPRC), approximately 5% of singly housed macaques develop symptoms of SIB. We have previously demonstrated that naltrexone hydrochloride can be effective in reducing SIB. We have also demonstrated that the astrocytes of animals with SIB are distinctly atrophic and display heightened innate immune activation compared with control animals. We have added a third group of animals (five macaques identified with SIB and treated with oral naltrexone at a dose of 3.2mg/kg) to the previous cohort (six macaques with a history of SIB but not treated, and nine animals with no history of SIB) for this study. Gray and white matter astrocytes from frontal cortical tissue were examined following necropsy. Innate immune activation of astrocytes, which was increased in SIB animals, was markedly decreased in animals receiving naltrexone, as was atrophy of both grey and white matter astrocytes. This was concomitant with improved behavioral correlates. Preventing astrocyte activation in select areas of the brain to reduce injurious behavior is an innovative concept with implications for mental health studies. Differences in multiple areas of primate brain would help determine how self-injurious behavior develops. These studies suggest a stronger role for astrocytes in the cellular events associated with self-injurious behaviors.
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Affiliation(s)
- Kim M. Lee
- Tulane National Primate Research Center, Covington, LA, USA,Tulane Program in Biomedical Science, Tulane University School of Medicine, New Orleans, LA, USA
| | - Kevin B. Chiu
- Tulane National Primate Research Center, Covington, LA, USA,Department of Biomedical Engineering, Tulane University, New Orleans, LA, USA
| | | | - Kate C. Baker
- Tulane National Primate Research Center, Covington, LA, USA,Department of Psychology, Tulane University, New Orleans, LA, USA,Tulane Program in Neuroscience, Tulane University, New Orleans, LA, USA
| | - Andrew G. MacLean
- Tulane National Primate Research Center, Covington, LA, USA,Tulane Program in Biomedical Science, Tulane University School of Medicine, New Orleans, LA, USA,Tulane Program in Neuroscience, Tulane University, New Orleans, LA, USA,Department of Microbiology & Immunology, Tulane University School of Medicine, New Orleans, LA, USA,Corresponding author: Andrew G. MacLean, Tulane National Primate Research Center, Covington, LA, 70433. ‘phone: 985-871-6489
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Chakravarty MM, Hamani C, Martinez-Canabal A, Ellegood J, Laliberté C, Nobrega JN, Sankar T, Lozano AM, Frankland PW, Lerch JP. Deep brain stimulation of the ventromedial prefrontal cortex causes reorganization of neuronal processes and vasculature. Neuroimage 2015; 125:422-427. [PMID: 26525655 DOI: 10.1016/j.neuroimage.2015.10.049] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 09/03/2015] [Accepted: 10/18/2015] [Indexed: 10/22/2022] Open
Abstract
BACKGROUND Chronic high-frequency electrical deep brain stimulation (DBS) of the subcallosal cingulate region is currently being investigated clinically as a therapy for treatment of refractory depression. Experimental DBS of the homologous region, the ventromedial prefrontal cortex (VMPFC), in rodent models has previously demonstrated anti-depressant-like effects. Our goal was to determine if structural remodeling accompanies the alterations of brain function previously observed as a result of chronic DBS. METHODS Here we applied 6h of high-frequency bilateral VMPFC DBS daily to 8 9-week old C57Bl/6 mice for 5days. We investigated the "micro-lesion" effect by using a sham stimulation group (8 mice) and a control group (8 mice with a hole drilled into the skull only). Whole brain anatomy was investigated post-mortem using high-resolution magnetic resonance imaging and areas demonstrating volumetric expansion were further investigated using histology and immunohistochemistry. RESULTS The DBS group demonstrated bilateral increases in whole hippocampus and the left thalamus volume compared to both sham and control groups. Local hippocampal and thalamic volume increases were also observed at the voxel-level; however these increases were observed in both DBS and sham groups. Follow-up immunohistochemistry in the hippocampus revealed DBS increased blood vessel size and synaptic density relative to the control group whereas the sham group demonstrated increased astrocyte size. CONCLUSIONS Our work demonstrates that DBS not only works by altering function with neural circuits, but also by structurally altering circuits at the cellular level. Neuroplastic alterations may play a role in mediating the clinical efficacy of DBS therapy.
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Affiliation(s)
- M Mallar Chakravarty
- Cerebral Imaging Centre, Douglas Mental Health University Institute, Canada; Department of Psychiatry, McGill University, Canada; Department of Biomedical Engineering, McGill University, Canada.
| | - Clement Hamani
- Division of Neurosurgery, Toronto Western Hospital, Canada; Behavioural Neurobiology Laboratory, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Canada
| | | | - Jacob Ellegood
- Mouse Imaging Centre (MICe), The Hospital for Sick Children, Canada
| | | | - José N Nobrega
- Department of Psychiatry, University of Toronto, Canada; Behavioural Neurobiology Laboratory, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Canada
| | - Tejas Sankar
- Division of Neurosurgery, Toronto Western Hospital, Canada; Division of Neurosurgery, University of Alberta, Canada
| | | | - Paul W Frankland
- Program in Neuroscience and Mental Health, The Hospital for Sick Children, Canada; Department of Psychology, University of Toronto, Toronto, Canada; Department of Physiology, University of Toronto, Toronto, Canada; Institute of Medical Science, University of Toronto, Toronto, Canada
| | - Jason P Lerch
- Program in Neuroscience and Mental Health, The Hospital for Sick Children, Canada; Mouse Imaging Centre (MICe), The Hospital for Sick Children, Canada; Department of Medical Biophysics, University of Toronto, Canada
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Long term sertraline effects on neural structures in depressed and nondepressed adult female nonhuman primates. Neuropharmacology 2015; 99:369-78. [PMID: 26116816 DOI: 10.1016/j.neuropharm.2015.06.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 06/08/2015] [Accepted: 06/14/2015] [Indexed: 12/22/2022]
Abstract
BACKGROUND Selective serotonin reuptake inhibitors (SSRIs) are widely prescribed for mood and other disorders. However, their neural effects are difficult to study due to patient compliance and drug history variability, and rarely studied in those prescribed SSRIs for non-mood disorders. Here we evaluated SSRI effects on neural volumetrics in depressed and nondepressed monkeys. METHODS 42 socially-housed cynomolgus monkeys were randomized to treatment balanced on pretreatment depressive behavior and body weight. Monkeys were trained for oral administration of placebo or 20 mg/kg sertraline HCl daily for 18 months and depressive and anxious behavior recorded. Volumes of neural regions of interest in depression were measured in magnetic resonance images and analyzed by 2 (depressed, nondepressed)×2 (placebo, sertraline) ANOVA. RESULTS Sertraline reduced anxiety (p=0.04) but not depressive behavior (p=0.43). Left Brodmann's Area (BA) 32 was smaller in depressed than nondepressed monkeys (main effect of depression: p<0.05). Sertraline and depression status interacted to affect volumes of left Anterior Cingulate Cortex (ACC), left BA24, right hippocampus (HC), and right anterior HC (sertraline×depression interactions: all p's<0.05). In the Placebo group, depressed monkeys had smaller right anterior HC and left ACC than nondepressed monkeys. In nondepressed monkeys, sertraline reduced right HC volume, especially right anterior HC volume. In depressed monkeys sertraline increased left ACC volume. In nondepressed monkeys, sertraline reduced left BA24 volumes resulting in smaller BA24 volumes in nondepressed than sertraline-treated depressed monkeys. CONCLUSIONS These observations suggest that SSRIs may differentially affect neural structures in depressed and nondepressed individuals.
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Lener MS, Iosifescu DV. In pursuit of neuroimaging biomarkers to guide treatment selection in major depressive disorder: a review of the literature. Ann N Y Acad Sci 2015; 1344:50-65. [DOI: 10.1111/nyas.12759] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Marc S. Lener
- Department of Psychiatry; Icahn School of Medicine at Mount Sinai; New York New York
| | - Dan V. Iosifescu
- Department of Psychiatry; Icahn School of Medicine at Mount Sinai; New York New York
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O'Leary OF, Cryan JF. A ventral view on antidepressant action: roles for adult hippocampal neurogenesis along the dorsoventral axis. Trends Pharmacol Sci 2014; 35:675-87. [PMID: 25455365 DOI: 10.1016/j.tips.2014.09.011] [Citation(s) in RCA: 137] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Revised: 09/29/2014] [Accepted: 09/30/2014] [Indexed: 11/26/2022]
Abstract
Adult hippocampal neurogenesis is implicated in antidepressant action, stress responses, and cognitive functioning. The hippocampus is functionally segregated along its longitudinal axis into dorsal (dHi) and ventral (vHi) regions in rodents, and analogous posterior and anterior regions in primates, whereby the vHi preferentially regulates stress and anxiety, while the dHi preferentially regulates spatial learning and memory. Given the role of neurogenesis in functions preferentially regulated by the dHi or vHi, it is plausible that neurogenesis is preferentially regulated in either the dHi or vHi depending upon the stimulus. We appraise here the literature on the effects of stress and antidepressants on neurogenesis along the hippocampal longitudinal axis and explore whether preferential regulation of neurogenesis in the vHi/anterior hippocampus contributes to stress resilience and antidepressant action.
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Affiliation(s)
- Olivia F O'Leary
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Alimentary Pharmabiotic Centre, University College Cork, Cork, Ireland.
| | - John F Cryan
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Alimentary Pharmabiotic Centre, University College Cork, Cork, Ireland
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Chen Y, Garcia GE, Huang W, Constantini S. The involvement of secondary neuronal damage in the development of neuropsychiatric disorders following brain insults. Front Neurol 2014; 5:22. [PMID: 24653712 PMCID: PMC3949352 DOI: 10.3389/fneur.2014.00022] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 02/20/2014] [Indexed: 12/12/2022] Open
Abstract
Neuropsychiatric disorders are one of the leading causes of disability worldwide and affect the health of billions of people. Previous publications have demonstrated that neuropsychiatric disorders can cause histomorphological damage in particular regions of the brain. By using a clinical symptom-comparing approach, 55 neuropsychiatric signs or symptoms related usually to 14 types of acute and chronic brain insults were identified and categorized in the present study. Forty percent of the 55 neuropsychiatric signs and symptoms have been found to be commonly shared by the 14 brain insults. A meta-analysis supports existence of the same neuropsychiatric signs or symptoms in all brain insults. The results suggest that neuronal damage might be occurring in the same or similar regions or structures of the brain. Neuronal cell death, neural loss, and axonal degeneration in some parts of the brain (the limbic system, basal ganglia system, brainstem, cerebellum, and cerebral cortex) might be the histomorphological basis that is responsible for the neuropsychiatric symptom clusters. These morphological alterations may be the result of secondary neuronal damage (a cascade of progressive neural injury and neuronal cell death that is triggered by the initial insult). Secondary neuronal damage causes neuronal cell death and neural injury in not only the initial injured site but also remote brain regions. It may be a major contributor to subsequent neuropsychiatric disorders following brain insults.
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Affiliation(s)
- Yun Chen
- BrightstarTech Inc. , Clarksburg, MD , USA
| | - Gregory E Garcia
- US Army Medical Research Institute of Chemical Defense, Aberdeen Proving Ground , Aberdeen, MD , USA
| | - Wei Huang
- Uniformed Services University of the Health Sciences , Bethesda, MD , USA
| | - Shlomi Constantini
- Department of Pediatric Neurosurgery, Dana Children's Hospital, Tel Aviv Medical Center, Tel Aviv University , Tel Aviv , Israel
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Talati P, Rane S, Kose S, Gore J, Heckers S. Anterior-posterior cerebral blood volume gradient in human subiculum. Hippocampus 2014; 24:503-9. [PMID: 24677295 DOI: 10.1002/hipo.22257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 01/31/2014] [Accepted: 01/31/2014] [Indexed: 12/29/2022]
Abstract
The human hippocampal formation is characterized by anterior-posterior gradients of cell density, neurochemistry, and hemodynamics. In addition, some functions are associated with specific subfields (subiculum, CA1-4, dentate gyrus) and regions (anterior and posterior). We performed contrast-enhanced, high-resolution T1-weighted 3T steady state (SS) imaging to investigate cerebral blood volume (CBV) gradients of the hippocampal formation. We studied 14 healthy subjects and found significant CBV gradients (anterior > posterior) in the subiculum but not in other hippocampal subfields. Since CBV is a marker of basal metabolism, these results indicate a greater baseline activity in the anterior compared with the posterior subiculum. This gradient might be related to the role of the subiculum as the main outflow station of the hippocampal formation and might have implications for the mechanisms of neuropsychiatric disorders.
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Affiliation(s)
- Pratik Talati
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, Tennessee; Department of Psychiatry, Vanderbilt University, Nashville, Tennessee
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Willard SL, Hemby SE, Register TC, McIntosh S, Shively CA. Altered expression of glial and synaptic markers in the anterior hippocampus of behaviorally depressed female monkeys. Neurosci Lett 2014; 563:1-5. [PMID: 24440617 DOI: 10.1016/j.neulet.2014.01.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 12/17/2013] [Accepted: 01/07/2014] [Indexed: 01/29/2023]
Abstract
The anterior hippocampus is associated with emotional functioning and hippocampal volume is reduced in depression. We reported reduced neuropil volume and number of glia in the dentate gyrus (DG) and cornu ammonis (CA)1 of the anterior hippocampus in behaviorally depressed adult female cynomolgus macaques. To determine the biochemical correlates of morphometric and behavioral differences between behaviorally depressed and nondepressed adult female monkeys, glial and synaptic transcripts and protein levels were assessed in the DG, CA3 and CA1 of the anterior hippocampus. Glial fibrillary acidic protein (GFAP) was increased whereas spinophilin and postsynaptic density (PSD)-95 protein were decreased in the CA1 of depressed monkeys. GFAP was reciprocally related to spinophilin and PSD-95 protein in the CA1. Gene expression of GFAP paralleled the protein changes observed in the CA1 and was inversely related to serum estradiol levels in depressed monkeys. These results suggest that behavioral depression in female primates is accompanied by astrocytic and synaptic protein alterations in the CA1. Moreover, these findings indicate a potential role for estrogen in modulating astrocyte-mediated impairments in synaptic plasticity.
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Affiliation(s)
- Stephanie L Willard
- Neuroscience Graduate Program, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157-1040, USA.
| | - Scott E Hemby
- Department of Physiology & Pharmacology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157-1040, USA.
| | - Thomas C Register
- Department of Pathology (Comparative Medicine), Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157-1040, USA.
| | - Scot McIntosh
- Department of Physiology & Pharmacology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157-1040, USA.
| | - Carol A Shively
- Department of Pathology (Comparative Medicine), Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157-1040, USA.
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Abstract
Depression causes significant morbidity in the human population. The Diathesis-Stress/Two-Hit model of depression hypothesizes that stress interacts with underlying (probably genetic) predispositions to produce a central nervous system that is primed to express psychopathology when confronted with stressful experiences later in life. Nonhuman primate (NHP) studies have been extensively utilized to test this model. NHPs are especially useful for studying effects of early experience, because many aspects of NHP infancy are similar to humans, whereas development occurs at an accelerated rate and therefore allows for more rapid assessment of experimental variables. In addition, the ability to manipulate putative risk factors, including introducing experimental stress during development, allows inference of causality not possible with human studies. This manuscript reviews experimental paradigms that have been utilized to model early adverse experience in NHPs, including peer-rearing, maternal separation, and variable foraging. It also provides examples of how this model has been used to investigate the effects of early experience on later neurobiology, physiology, and behavior associated with depression. We conclude that the NHP offers an excellent model to research mechanisms contributing to the Diathesis-Stress/Two-Hit model of depression.
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