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Li X, Ramos-Rolón AP, Kass G, Pereira-Rufino LS, Shifman N, Shi Z, Volkow ND, Wiers CE. Imaging neuroinflammation in individuals with substance use disorders. J Clin Invest 2024; 134:e172884. [PMID: 38828729 PMCID: PMC11142750 DOI: 10.1172/jci172884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024] Open
Abstract
Increasing evidence suggests a role of neuroinflammation in substance use disorders (SUDs). This Review presents findings from neuroimaging studies assessing brain markers of inflammation in vivo in individuals with SUDs. Most studies investigated the translocator protein 18 kDa (TSPO) using PET; neuroimmune markers myo-inositol, choline-containing compounds, and N-acetyl aspartate using magnetic resonance spectroscopy; and fractional anisotropy using MRI. Study findings have contributed to a greater understanding of neuroimmune function in the pathophysiology of SUDs, including its temporal dynamics (i.e., acute versus chronic substance use) and new targets for SUD treatment.
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Affiliation(s)
- Xinyi Li
- Center for Studies of Addiction, University of Pennsylvania Perelman School of Medicine, Department of Psychiatry, Philadelphia, Pennsylvania, USA
| | - Astrid P. Ramos-Rolón
- Center for Studies of Addiction, University of Pennsylvania Perelman School of Medicine, Department of Psychiatry, Philadelphia, Pennsylvania, USA
| | - Gabriel Kass
- Center for Studies of Addiction, University of Pennsylvania Perelman School of Medicine, Department of Psychiatry, Philadelphia, Pennsylvania, USA
| | - Lais S. Pereira-Rufino
- Departamento de Morfologia e Genética, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Naomi Shifman
- Center for Studies of Addiction, University of Pennsylvania Perelman School of Medicine, Department of Psychiatry, Philadelphia, Pennsylvania, USA
| | - Zhenhao Shi
- Center for Studies of Addiction, University of Pennsylvania Perelman School of Medicine, Department of Psychiatry, Philadelphia, Pennsylvania, USA
| | - Nora D. Volkow
- Laboratory of Neuroimaging, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, Maryland, USA
| | - Corinde E. Wiers
- Center for Studies of Addiction, University of Pennsylvania Perelman School of Medicine, Department of Psychiatry, Philadelphia, Pennsylvania, USA
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Yuan JP, Jaeger EL, Coury SM, Uy JP, Buthmann JL, Ho TC, Gotlib IH. Socioeconomic Disadvantage Moderates the Association of Systemic Inflammation with Amygdala Volume in Adolescents Over a Two-Year Interval: An Exploratory Study. BIOLOGICAL PSYCHIATRY. COGNITIVE NEUROSCIENCE AND NEUROIMAGING 2024:S2451-9022(24)00135-6. [PMID: 38815859 DOI: 10.1016/j.bpsc.2024.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 05/03/2024] [Accepted: 05/09/2024] [Indexed: 06/01/2024]
Abstract
BACKGROUND Research has demonstrated an association between elevated systemic inflammation and changes in brain function. Affective areas of the brain involved in processing threat (e.g., amygdala) and reward (e.g., nucleus accumbens [NAcc]) appear to be sensitive to inflammation. Early life stress (ELS), such as experiencing low socioeconomic status (SES), may also potentiate this association, but relevant evidence has come primarily from cross-sectional studies of brain function. It is unclear whether similar associations are present between ELS, inflammation, and brain structure, particularly in typically developing populations. METHODS We recruited and assessed 50 adolescents (31F/19M) from the community (M±SD age=15.5±1.1; range=13.1-17.5 years ) and in exploratory analyses examined whether changes in C-reactive protein (ΔCRP) from blood spots predict changes in gray matter volumes (ΔGMV) in the bilateral amygdala and NAcc over a two-year period. We also investigated whether experiencing ELS, operationalized using a comprehensive composite score of SES disadvantage at the family and neighborhood levels, significantly moderated the association between ΔCRP and ΔGMV. RESULTS We found that ΔCRP was negatively associated with ΔAmygdala GMV (i.e. increasing CRP levels were associated with decreasing amygdala volume; β=-0.84; p=0.012). This effect was stronger in youth who experienced greater SES disadvantage (β=-0.56; p=0.025). CONCLUSIONS These findings suggest that increases in systemic inflammation are associated with reductions in amygdala GMV in adolescents, potentially signaling accelerated maturation, and that these neuroimmune processes are compounded in adolescents who experienced greater SES disadvantage. Our findings are consistent with theoretical frameworks of neuroimmune associations and suggest they may influence adolescent neurodevelopment.
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Affiliation(s)
| | | | - Saché M Coury
- Dept. of Psychology, Stanford University; Dept. of Psychology, University of California, Los Angeles
| | | | | | - Tiffany C Ho
- Dept. of Psychology, University of California, Los Angeles
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3
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Dias-Carvalho A, Sá SI, Carvalho F, Fernandes E, Costa VM. Inflammation as common link to progressive neurological diseases. Arch Toxicol 2024; 98:95-119. [PMID: 37964100 PMCID: PMC10761431 DOI: 10.1007/s00204-023-03628-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 10/12/2023] [Indexed: 11/16/2023]
Abstract
Life expectancy has increased immensely over the past decades, bringing new challenges to the health systems as advanced age increases the predisposition for many diseases. One of those is the burden of neurologic disorders. While many hypotheses have been placed to explain aging mechanisms, it has been widely accepted that the increasing pro-inflammatory status with advanced age or "inflammaging" is a main determinant of biological aging. Furthermore, inflammaging is at the cornerstone of many age-related diseases and its involvement in neurologic disorders is an exciting hypothesis. Indeed, aging and neurologic disorders development in the elderly seem to share some basic pathways that fundamentally converge on inflammation. Peripheral inflammation significantly influences brain function and contributes to the development of neurological disorders, including Alzheimer's disease, Parkinson's disease, and multiple sclerosis. Understanding the role of inflammation in the pathogenesis of progressive neurological diseases is of crucial importance for developing effective treatments and interventions that can slow down or prevent disease progression, therefore, decreasing its social and economic burden.
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Affiliation(s)
- Ana Dias-Carvalho
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal.
- UCIBIO- Applied Molecular Biosciences Unit, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal.
| | - Susana Isabel Sá
- Unit of Anatomy, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal
- CINTESIS@RISE, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Félix Carvalho
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal
- UCIBIO- Applied Molecular Biosciences Unit, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal
| | - Eduarda Fernandes
- LAQV, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal
| | - Vera Marisa Costa
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal.
- UCIBIO- Applied Molecular Biosciences Unit, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, 4050-313, Porto, Portugal.
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4
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Elmers J, Colzato LS, Akgün K, Ziemssen T, Beste C. Neurofilaments - Small proteins of physiological significance and predictive power for future neurodegeneration and cognitive decline across the life span. Ageing Res Rev 2023; 90:102037. [PMID: 37619618 DOI: 10.1016/j.arr.2023.102037] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 05/15/2023] [Accepted: 08/17/2023] [Indexed: 08/26/2023]
Abstract
Neurofilaments (NFs) are not only important for axonal integrity and nerve conduction in large myelinated axons but they are also thought to be crucial for receptor and synaptic functioning. Therefore, NFs may play a critical role in cognitive functions, as cognitive processes are known to depend on synaptic integrity and are modulated by dopaminergic signaling. Here, we present a theory-driven interdisciplinary approach that NFs may link inflammation, neurodegeneration, and cognitive functions. We base our hypothesis on a wealth of evidence suggesting a causal link between inflammation and neurodegeneration and between these two and cognitive decline (see Fig. 1), also taking dopaminergic signaling into account. We conclude that NFs may not only serve as biomarkers for inflammatory, neurodegenerative, and cognitive processes but also represent a potential mechanical hinge between them, moreover, they may even have predictive power regarding future cognitive decline. In addition, we advocate the use of both NFs and MRI parameters, as their synthesis offers the opportunity to individualize medical treatment by providing a comprehensive view of underlying disease activity in neurological diseases. Since our society will become significantly older in the upcoming years and decades, maintaining cognitive functions and healthy aging will play an important role. Thanks to technological advances in recent decades, NFs could serve as a rapid, noninvasive, and relatively inexpensive early warning system to identify individuals at increased risk for cognitive decline and could facilitate the management of cognitive dysfunctions across the lifespan.
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Affiliation(s)
- Julia Elmers
- Cognitive Neurophysiology, Department of Child and Adolescent Psychiatry, Faculty of Medicine, TU Dresden, Germany; Center of Clinical Neuroscience, Department of Neurology, University Hospital Carl Gustav Carus, TU Dresden, Germany
| | - Lorenza S Colzato
- Cognitive Neurophysiology, Department of Child and Adolescent Psychiatry, Faculty of Medicine, TU Dresden, Germany; Cognitive Psychology, Faculty of Psychology, Shandong Normal University, Jinan, China.
| | - Katja Akgün
- Center of Clinical Neuroscience, Department of Neurology, University Hospital Carl Gustav Carus, TU Dresden, Germany
| | - Tjalf Ziemssen
- Center of Clinical Neuroscience, Department of Neurology, University Hospital Carl Gustav Carus, TU Dresden, Germany
| | - Christian Beste
- Cognitive Neurophysiology, Department of Child and Adolescent Psychiatry, Faculty of Medicine, TU Dresden, Germany; Cognitive Psychology, Faculty of Psychology, Shandong Normal University, Jinan, China.
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5
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McIntosh RC, Lobo J, Paparozzi J, Goodman Z, Kornfeld S, Nomi J. Neutrophil to lymphocyte ratio is a transdiagnostic biomarker of depression and structural and functional brain alterations in older adults. J Neuroimmunol 2022; 365:577831. [PMID: 35217366 PMCID: PMC11092564 DOI: 10.1016/j.jneuroim.2022.577831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/30/2022] [Accepted: 02/14/2022] [Indexed: 12/30/2022]
Abstract
The neutrophil to lymphocyte ratio (N:L) is an emergent transdiagnostic biomarker shown to predict peripheral inflammation as well as neuropsychiatric impairment. The afferent signaling of inflammation to the central nervous system has been implicated in the pathophysiology of sickness behavior and depression. Here, the N:L was compared to structural and functional limbic alterations found concomitant with depression within a geriatric cohort. Venous blood was collected for a complete blood count, and magnetic resonance imaging as well as phenotypic data were collected from the 66 community-dwelling older adults (aged 65-86 years). The N:L was regressed on gray matter volume and resting-state functional connectivity (rsFC) of the subgenual anterior cingulate (sgACC). Thresholded parameter estimates were extracted from structural and functional brain scans and bivariate associations tested with scores on the geriatric depression scale. Greater N:L predicted lower volume of hypothalamus and rsFC of sgACC with ventromedial prefrontal cortex. Both parameters were correlated (p < 0.05) with greater symptomology in those reporting moderate to severe levels of depression. These findings support the N:L as a transdiagnostic biomarker of limbic alteration underpinning mood disturbance in non-treated older adults.
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Affiliation(s)
- Roger C McIntosh
- Department of Psychology, University of Miami, Coral Gables, FL 33124, United States of America.
| | - Judith Lobo
- Department of Psychology, University of Miami, Coral Gables, FL 33124, United States of America
| | - Jeremy Paparozzi
- Department of Psychology, University of Miami, Coral Gables, FL 33124, United States of America
| | - Zach Goodman
- Department of Psychology, University of Miami, Coral Gables, FL 33124, United States of America
| | - Salome Kornfeld
- Department of Psychology, University of Miami, Coral Gables, FL 33124, United States of America
| | - Jason Nomi
- Department of Psychology, University of Miami, Coral Gables, FL 33124, United States of America
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Sandström A, Ellerbrock I, Löfgren M, Altawil R, Bileviciute-Ljungar I, Lampa J, Kosek E. Distinct aberrations in cerebral pain processing differentiating patients with fibromyalgia from patients with rheumatoid arthritis. Pain 2022; 163:538-547. [PMID: 34224497 PMCID: PMC8832547 DOI: 10.1097/j.pain.0000000000002387] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 06/11/2021] [Accepted: 06/15/2021] [Indexed: 11/26/2022]
Abstract
ABSTRACT The current study used functional magnetic resonance imaging to directly compare disease-relevant cerebral pain processing in well-characterized patient cohorts of fibromyalgia (FM, nociplastic pain) and rheumatoid arthritis (RA, nociceptive pain). Secondary aims were to identify pain-related cerebral alterations related to the severity of clinical symptoms such as pain intensity, depression, and anxiety. Twenty-six patients with FM (without RA-comorbidity) and 31 patients with RA (without FM-comorbidity) underwent functional magnetic resonance imaging while stimulated with subjectively calibrated painful pressures corresponding to a pain sensation of 50 mm on a 100-mm visual analogue scale. Stimulation sites were at the most inflamed proximal interphalangeal joint in the left hand in patients with RA and the left thumbnail in patients with FM, 2 sites that have previously been shown to yield the same brain activation in healthy controls. The current results revealed disease-distinct differences during pain modulation in RA and FM. Specifically, in response to painful stimulation, patients with FM compared to patients with RA exhibited increased brain activation in bilateral inferior parietal lobe (IPL), left inferior frontal gyrus (IFG)/ventrolateral prefrontal cortex (vlPFC) encapsulating left dorsolateral prefrontal cortex, and right IFG/vlPFC. However, patients with RA compared to patients with FM exhibited increased functional connectivity (during painful stimulation) between right and left IPL and sensorimotor network and between left IPL and frontoparietal network. Within the FM group only, anxiety scores positively correlated with pain-related brain activation in left dorsolateral prefrontal cortex and right IFG/vlPFC, which further highlights the complex interaction between affective (ie, anxiety scores) and sensory (ie, cerebral pain processing) dimensions in this patient group.
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Affiliation(s)
- Angelica Sandström
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Department of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden
| | - Isabel Ellerbrock
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Department of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden
| | - Monika Löfgren
- Department of Clinical Sciences, Karolinska Institutet, Danderyd University Hospital, Stockholm, Sweden
| | - Reem Altawil
- Department of Medicine, Rheumatology Unit, Center for Molecular Medicine (CMM), Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Indre Bileviciute-Ljungar
- Department of Clinical Sciences, Karolinska Institutet, Danderyd University Hospital, Stockholm, Sweden
| | - Jon Lampa
- Department of Medicine, Rheumatology Unit, Center for Molecular Medicine (CMM), Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Eva Kosek
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Department of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden
- Department of Surgical Sciences/Pain Research, Uppsala University, Uppsala, Sweden
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Abstract
The overarching objective is to review how early exposure to adversity interacts with inflammation to alter brain maturation. Both adversity and inflammation are significant risk factors for psychopathology. Literature relevant to the effects of adversity in children and adolescents on brain development is reviewed. These studies are supported by research in animals exposed to species-relevant stressors during development. While it is known that exposure to adversity at any age increases inflammation, the effects of inflammation are exacerbated at developmental stages when the immature brain is uniquely sensitive to experiences. Microglia play a vital role in this process, as they scavenge cellular debris and prune synapses to optimize performance. In essence, microglia modify the synapse to match environmental demands, which is necessary for someone with a history of adversity. Overall, by piecing together clinical and preclinical research areas, what emerges is a picture of how adversity uniquely sculpts the brain. Microglia interactions with the inhibitory neurotransmitter GABA (specifically, the subtype expressing parvalbumin) are discussed within contexts of development and adversity. A review of inflammation markers in individuals with a history of abuse is combined with preclinical studies to describe their effects on maturation. Inconsistencies within the literature are discussed, with a call for standardizing methodologies relating to the age of assessing adversity effects, measures to quantify stress and inflammation, and more brain-based measures of biochemistry. Preclinical studies pave the way for interventions using anti-inflammation-based agents (COX-2 inhibitors, CB2 agonists, meditation/yoga) by identifying where, when, and how the developmental trajectory goes awry.
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Karoly HC, Skrzynski CJ, Moe E, Bryan AD, Hutchison KE. Investigating Associations Between Inflammatory Biomarkers, Gray Matter, Neurofilament Light and Cognitive Performance in Healthy Older Adults. Front Aging Neurosci 2021; 13:719553. [PMID: 34539381 PMCID: PMC8446648 DOI: 10.3389/fnagi.2021.719553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 07/29/2021] [Indexed: 11/18/2022] Open
Abstract
Background: Exploring biological variables that may serve as indicators of the development and progression of cognitive decline is currently a high-priority research area. Recent studies have demonstrated that during normal aging, individuals experience increased inflammation throughout the brain and body, which may be linked to cognitive impairment and reduced gray matter volume in the brain. Neurofilament light polypeptide (NfL), which is released into the circulation following neuronal damage, has been proposed as a biomarker for neurodegenerative diseases, and may also have utility in the context of normal aging. The present study tested associations between age, peripheral levels of the pro-inflammatory cytokine IL-6, peripheral NfL, brain volume, and cognitive performance in a sample of healthy adults over 60 years old. Methods: Of the 273 individuals who participated in this study, 173 had useable neuroimaging data, a subset of whom had useable blood data (used for quantifying IL-6 and NfL) and completed a cognitive task. Gray matter (GM) thickness values were extracted from brain areas of interest using Freesurfer. Regression models were used to test relationships between IL-6, NfL, GM, and cognitive performance. To test putative functional relationships between these variables, exploratory path analytic models were estimated, in which the relationship between age, IL-6, and working memory performance were linked via four different operationalizations of brain health: (1) a latent GM variable composed of several regions linked to cognitive impairment, (2) NfL alone, (3) NfL combined with the GM latent variable, and (4) the hippocampus alone. Results: Regression models showed that IL-6 and NfL were significantly negatively associated with GM volume and that GM was positively associated with cognitive performance. The path analytic models indicated that age and cognitive performance are linked by GM in the hippocampus as well as several other regions previously associated with cognitive impairment, but not by NfL alone. Peripheral IL-6 was not associated with age in any of the path models. Conclusions: Results suggest that among healthy older adults, there are several GM regions that link age and cognitive performance. Notably, NfL alone is not a sufficient marker of brain changes associated with aging, inflammation, and cognitive performance.
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Affiliation(s)
- Hollis C Karoly
- Institute for Cognitive Science, University of Colorado Boulder, Boulder, CO, United States.,Department of Psychology, Colorado State University, Fort Collins, CO, United States
| | - Carillon J Skrzynski
- Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, CO, United States
| | - Erin Moe
- Department of Psychiatry, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Angela D Bryan
- Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, CO, United States
| | - Kent E Hutchison
- Institute for Cognitive Science, University of Colorado Boulder, Boulder, CO, United States.,Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, CO, United States.,Department of Psychiatry, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
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9
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Inflammatory markers and tract-based structural connectomics in older adults with a preliminary exploration of associations by race. Brain Imaging Behav 2021; 16:130-140. [PMID: 34272684 DOI: 10.1007/s11682-021-00483-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/08/2021] [Indexed: 10/20/2022]
Abstract
Peripheral inflammation has been implicated in cognitive dysfunction and dementia. While studies outline the relationship between elevated inflammation and individual gray or white matter alterations, less work has examined inflammation as related to connectivity between gray and white matter or variability in these associations by race. We examined the relationship between peripheral inflammation and tract-based structural connectomics in 74 non-demented participants (age = 69.19 ± 6.80 years; 53% female; 45% Black) who underwent fasting venipuncture and MRI. Serum was assayed for C-reactive protein, interleukin-6, and interleukin-1β. Graph theory analysis integrated T1-derived gray matter volumes and DTI-derived white matter tractography into connectivity matrices analyzed for local measures of nodal strength and efficiency in a priori regions of interest associated with cardiovascular disease risk factors and dementia. Linear regressions adjusting for relevant covariates showed associations between inflammatory markers and nodal strength in the isthmus, posterior and caudal anterior cingulate (p's ≤ .042). Adding an inflammatory marker*race term showed race-modified associations between C-reactive protein and efficiency in the thalamus and amygdala, and nodal strength in the putamen (p's ≤ .048), between interleukin-6 and efficiency in the pars triangularis and amygdala (p's ≤ .024), and between interleukin-1β and nodal strength in the pars opercularis (p = .048). Higher levels of inflammation associated with lower efficiency and higher strength for White participants but higher efficiency and lower strength for Black participants. Results suggest inflammation is associated with tract-based structural connectomics in an older diverse cohort and that differential relationships may exist by race within prefrontal and limbic brain regions.
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Oberlin LE, Erickson KI, Mackey R, Klunk WE, Aizenstein H, Lopresti BJ, Kuller LH, Lopez OL, Snitz BE. Peripheral inflammatory biomarkers predict the deposition and progression of amyloid-β in cognitively unimpaired older adults. Brain Behav Immun 2021; 95:178-189. [PMID: 33737171 PMCID: PMC8647033 DOI: 10.1016/j.bbi.2021.03.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 02/23/2021] [Accepted: 03/10/2021] [Indexed: 12/28/2022] Open
Abstract
INTRODUCTION Systemic inflammation has been increasingly implicated in the pathogenesis of Alzheimer's disease (AD), yet the mechanistic and temporal specificity of this relationship is poorly understood. We aimed to characterize the cross-sectional and longitudinal associations between peripheral inflammatory biomarkers, cognition, and Aβ deposition in oldest-old cognitively unimpaired (CU) adults. METHODS A large sample of 139 CU older adults (mean age (range) = 85.4 (82-95)) underwent neuropsychological testing, Pittsburgh compound-B (PiB)-PET imaging and structural MRI. Hierarchical regression models examined associations between circulating inflammatory biomarkers (Interleukin-6 (IL-6), soluble Tumor Necrosis Factor receptors 1 and 2 (sTNFr1 and sTNFr2), soluble cluster of differentiation 14 (sCD14), C-reactive protein (CRP)), cognition, and global and regional Aβ deposition at baseline and over follow-up. Indices of preclinical disease, including pathologic Aβ status and hippocampal volume, were incorporated to assess conditional associations. RESULTS At baseline evaluation, higher concentrations of IL-6 and sTNFr2 were associated with greater global Aβ burden in those with lower hippocampal volume. In longitudinal models, IL-6 predicted subsequent conversion to MCI and both IL-6 and CRP predicted greater change in global and regional Aβ deposition specifically among participants PiB-positive at baseline. These relationships withstood adjustment for demographic factors, anti-hypertensive medication use, history of diabetes, heart disease, APOE ε4 carrier status, and white matter lesions. DISCUSSION In a large prospective sample of CU adults aged 80 and over, peripheral inflammatory biomarkers were associated with and predictive of the progression of Aβ deposition. This was specific to those with biomarker evidence of preclinical AD at baseline, supporting recent evidence of disease-state-dependent differences in inflammatory expression profiles. Chronic, low-level systemic inflammation may exacerbate the deposition of Aβ pathology among those with emerging disease processes, and place individuals at a higher risk of developing clinically significant cognitive impairment.
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Affiliation(s)
| | - Kirk I. Erickson
- Department of Psychology, University of Pittsburgh, Pittsburgh, PA,Center for the Neural Basis of Cognition, University of Pittsburgh, Pittsburgh, PA,College of Science, Health, Engineering and Education, Murdoch University, Perth, Australia
| | - Rachel Mackey
- Premier Applied Sciences, Premier Inc., Charlotte, North Carolina,Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA
| | - William E. Klunk
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA
| | | | | | - Lewis H. Kuller
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA
| | - Oscar L. Lopez
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA,Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA
| | - Beth E. Snitz
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA
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11
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Zahr NM, Pohl KM, Kwong AJ, Sullivan EV, Pfefferbaum A. Preliminary Evidence for a Relationship between Elevated Plasma TNFα and Smaller Subcortical White Matter Volume in HCV Infection Irrespective of HIV or AUD Comorbidity. Int J Mol Sci 2021; 22:ijms22094953. [PMID: 34067023 PMCID: PMC8124321 DOI: 10.3390/ijms22094953] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 04/27/2021] [Accepted: 04/28/2021] [Indexed: 02/08/2023] Open
Abstract
Classical inflammation in response to bacterial, parasitic, or viral infections such as HIV includes local recruitment of neutrophils and macrophages and the production of proinflammatory cytokines and chemokines. Proposed biomarkers of organ integrity in Alcohol Use Disorders (AUD) include elevations in peripheral plasma levels of proinflammatory proteins. In testing this proposal, previous work included a group of human immunodeficiency virus (HIV)-infected individuals as positive controls and identified elevations in the soluble proteins TNFα and IP10; these cytokines were only elevated in AUD individuals seropositive for hepatitis C infection (HCV). The current observational, cross-sectional study evaluated whether higher levels of these proinflammatory cytokines would be associated with compromised brain integrity. Soluble protein levels were quantified in 86 healthy controls, 132 individuals with AUD, 54 individuals seropositive for HIV, and 49 individuals with AUD and HIV. Among the patient groups, HCV was present in 24 of the individuals with AUD, 13 individuals with HIV, and 20 of the individuals in the comorbid AUD and HIV group. Soluble protein levels were correlated to regional brain volumes as quantified with structural magnetic resonance imaging (MRI). In addition to higher levels of TNFα and IP10 in the 2 HIV groups and the HCV-seropositive AUD group, this study identified lower levels of IL1β in the 3 patient groups relative to the control group. Only TNFα, however, showed a relationship with brain integrity: in HCV or HIV infection, higher peripheral levels of TNFα correlated with smaller subcortical white matter volume. These preliminary results highlight the privileged status of TNFα on brain integrity in the context of infection.
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Affiliation(s)
- Natalie M. Zahr
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA 94305, USA; (K.M.P.); (A.P.)
- Neuroscience Program, SRI International, Menlo Park, CA 94025, USA;
- Correspondence: ; Tel.: +1-650-859-5243
| | - Kilian M. Pohl
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA 94305, USA; (K.M.P.); (A.P.)
- Neuroscience Program, SRI International, Menlo Park, CA 94025, USA;
| | - Allison J. Kwong
- Gastroenterology and Hepatology Medicine, Stanford University School of Medicine, Stanford, CA 94350, USA;
| | | | - Adolf Pfefferbaum
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA 94305, USA; (K.M.P.); (A.P.)
- Neuroscience Program, SRI International, Menlo Park, CA 94025, USA;
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12
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Lindbergh CA, Casaletto KB, Staffaroni AM, Elahi F, Walters SM, You M, Neuhaus J, Rivera Contreras W, Wang P, Karydas A, Brown J, Wolf A, Rosen H, Cobigo Y, Kramer JH. Systemic Tumor Necrosis Factor-Alpha Trajectories Relate to Brain Health in Typically Aging Older Adults. J Gerontol A Biol Sci Med Sci 2020; 75:1558-1565. [PMID: 31549145 PMCID: PMC7457183 DOI: 10.1093/gerona/glz209] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Central nervous system levels of tumor necrosis factor-alpha (TNF-α), a pro-inflammatory cytokine, regulate the neuroinflammatory response and may play a role in age-related neurodegenerative diseases. The longitudinal relation between peripheral levels of TNF-α and typical brain aging is understudied. We hypothesized that within-person increases in systemic TNF-α would track with poorer brain health outcomes in functionally normal adults. METHODS Plasma-based TNF-α concentrations (pg/mL; fasting morning draws) and magnetic resonance imaging were acquired in 424 functionally intact adults (mean age = 71) followed annually for up to 8.4 years (mean follow-up = 2.2 years). Brain outcomes included total gray matter volume and white matter hyperintensities. Cognitive outcomes included composites of memory, executive functioning, and processing speed, as well as Mini-Mental State Examination total scores. Longitudinal mixed-effects models were used, controlling for age, sex, education, and total intracranial volume, as appropriate. RESULTS TNF-α concentrations significantly increased over time (p < .001). Linear increases in within-person TNF-α were longitudinally associated with declines in gray matter volume (p < .001) and increases in white matter hyperintensities (p = .003). Exploratory analyses suggested that the relation between TNF-α and gray matter volume was curvilinear (TNF-α 2p = .002), such that initial increases in inflammation were associated with more precipitous atrophy. There was a negative linear relationship of within-person changes in TNF-α to Mini-Mental State Examination scores over time (p = .036) but not the cognitive composites (all ps >.05). CONCLUSION Systemic inflammation, as indexed by plasma TNF-α, holds potential as a biomarker for age-related declines in brain health.
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Affiliation(s)
| | | | | | - Fanny Elahi
- Department of Neurology, Memory and Aging Center and , California
| | | | - Michelle You
- Department of Neurology, Memory and Aging Center and , California
| | - John Neuhaus
- Department of Epidemiology and Biostatistics, University of California at San Francisco, California
| | | | - Paul Wang
- Department of Neurology, Memory and Aging Center and , California
| | - Anna Karydas
- Department of Neurology, Memory and Aging Center and , California
| | - Jesse Brown
- Department of Neurology, Memory and Aging Center and , California
| | - Amy Wolf
- Department of Neurology, Memory and Aging Center and , California
| | - Howie Rosen
- Department of Neurology, Memory and Aging Center and , California
| | - Yann Cobigo
- Department of Neurology, Memory and Aging Center and , California
| | - Joel H Kramer
- Department of Neurology, Memory and Aging Center and , California
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13
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Chen X, Maguire B, Brodaty H, O'Leary F. Dietary Patterns and Cognitive Health in Older Adults: A Systematic Review. J Alzheimers Dis 2020; 67:583-619. [PMID: 30689586 DOI: 10.3233/jad-180468] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
While the role of diet and nutrition in cognitive health and prevention of dementia in older adults has attracted much attention, the efficacy of different dietary patterns remains uncertain. Previous reviews have mainly focused on the Mediterranean diet, but either omitted other dietary patterns, lacked more recent studies, were based on cross-sectional studies, or combined older and younger populations. We followed PRISMA guidelines, and examined the efficacy of current research from randomized controlled trials and cohort studies on the effects of different dietary patterns. We reviewed the Mediterranean diet, Dietary Approach to Stop Hypertension (DASH) diet, the Mediterranean-DASH diet Intervention for Neurodegenerative Delay (MIND) diet, Anti-inflammatory diet, Healthy diet recommended by guidelines via dietary index, or Prudent healthy diets generated via statistical approaches, and their impact on cognitive health among older adults. Of 38 studies, the Mediterranean diet was the most investigated with evidence supporting protection against cognitive decline among older adults. Evidence from other dietary patterns such as the MIND, DASH, Anti-inflammatory, and Prudent healthy diets was more limited but showed promising results, especially for those at risk of cardiovascular disease. Overall, this review found positive effects of dietary patterns including the Mediterranean, DASH, MIND, and Anti-inflammatory diets on cognitive health outcomes in older adults. These dietary patterns are plant-based, rich in poly- and mono-unsaturated fatty acids with lower consumption of processed foods. Better understanding of the underlying mechanisms and effectiveness is needed to develop comprehensive and practical dietary recommendations against age-related cognitive decline among older adult.
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Affiliation(s)
- Xi Chen
- Dementia Centre for Research Collaboration, School of Psychiatry, Faculty of Medicine, the University of New South Wales, NSW, Australia
| | - Brook Maguire
- Nutrition and Dietetics Group, School of Life and Environmental Science and The Charles Perkins Centre, Faculty of Science, the University of Sydney, NSW, Australia
| | - Henry Brodaty
- Dementia Centre for Research Collaboration, School of Psychiatry, Faculty of Medicine, the University of New South Wales, NSW, Australia.,Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, the University of New South Wales, Australia
| | - Fiona O'Leary
- Nutrition and Dietetics Group, School of Life and Environmental Science and The Charles Perkins Centre, Faculty of Science, the University of Sydney, NSW, Australia
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14
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Overlapping mechanisms linking insulin resistance with cognition and neuroprogression in bipolar disorder. Neurosci Biobehav Rev 2020; 111:125-134. [PMID: 31978440 DOI: 10.1016/j.neubiorev.2020.01.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 01/17/2020] [Accepted: 01/20/2020] [Indexed: 12/26/2022]
Abstract
Cognitive impairment is highly prevalent in the progression of both diabetes mellitus and bipolar disorder. The relationship between insulin resistance in diabetes and the risk of developing major neurocognitive disorders such as Alzheimer's disease has been well described. Insulin resistance and the associated metabolic deficiencies lead to biochemical alteration which hasten neurodegeneration and subsequent cognitive impairment. For bipolar disorder, some patients experience a cyclical, yet progressive course of illness. These patients are also more likely to have medical comorbidities such as cardiovascular disease and diabetes, and insulin resistance in particular may precede the neuroprogressive course. Diabetes and bipolar disorder share epidemiological, biochemical, and structural signatures, as well as cognitive impairment within similar domains, suggesting a common mechanism between the two conditions. Here we describe the association between insulin resistance and cognitive changes in bipolar disorder, as well as potential implications for therapeutic modulation of neuroprogression.
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15
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Boccardi V, Westman E, Pelini L, Lindberg O, Muehlboeck JS, Simmons A, Tarducci R, Floridi P, Chiarini P, Soininen H, Kloszewska I, Tsolaki M, Vellas B, Spenger C, Wahlund LO, Lovestone S, Mecocci P. Differential Associations of IL-4 With Hippocampal Subfields in Mild Cognitive Impairment and Alzheimer's Disease. Front Aging Neurosci 2019; 10:439. [PMID: 30705627 PMCID: PMC6344381 DOI: 10.3389/fnagi.2018.00439] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 12/24/2018] [Indexed: 12/26/2022] Open
Abstract
Background/Aims: We aimed to assess the association between in volumetric measures of hippocampal sub-regions - in healthy older controls (HC), subjects with mild cognitive impairment (MCI) and AD- with circulating levels of IL-4. Methods: From AddNeuroMed Project 113 HC, 101 stable MCI (sMCI), 22 converter MCI (cMCI) and 119 AD were included. Hippocampal subfield volumes were analyzed using Freesurfer 6.0.0 on high-resolution sagittal 3D-T1W MP-RAGE acquisitions. Plasmatic IL-4 was measured using ELISA assay. Results: IL-4 was found to be (a) positively associate with left subiculum volume (β = 0.226, p = 0.037) in sMCI and (b) negatively associate with left subiculum volume (β = -0.253, p = 0.011) and left presubiculum volume (β = -0.257, p = 0.011) in AD. Conclusion: Our results indicate a potential neuroprotective effect of IL-4 on the areas of the hippocampus more vulnerable to aging and neurodegeneration.
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Affiliation(s)
- Virginia Boccardi
- Department of Medicine, Institute of Gerontology and Geriatrics, University of Perugia, Perugia, Italy
| | - Eric Westman
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Luca Pelini
- Department of Medicine, Institute of Gerontology and Geriatrics, University of Perugia, Perugia, Italy
| | - Olof Lindberg
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - J-Sebastian Muehlboeck
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Andrew Simmons
- Department of Neuroimaging, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, United Kingdom
| | - Roberto Tarducci
- Division of Medical Physics, Perugia University Hospital, Perugia, Italy
| | - Piero Floridi
- Division of Neuroradiology, Perugia University Hospital, Perugia, Italy
| | - Pietro Chiarini
- Division of Neuroradiology, Perugia University Hospital, Perugia, Italy
| | - Hilkka Soininen
- Department of Neurology, University of Eastern Finland - Kuopio University Hospital, Kuopio, Finland
| | - Iwona Kloszewska
- Department of Old Age Psychiatry and Psychotic Disorders, Medical University of Łódź, Łódź, Poland
| | - Magda Tsolaki
- 3rd Department of Neurology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Bruno Vellas
- University of Toulouse, INSERM 1027, Gérontopôle, Toulouse, France
| | - Christian Spenger
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Lars-Olof Wahlund
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Simon Lovestone
- Department of Psychiatry, Warneford Hospital, University of Oxford, Oxford, United Kingdom
| | - Patrizia Mecocci
- Department of Medicine, Institute of Gerontology and Geriatrics, University of Perugia, Perugia, Italy
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16
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Chen J, Yan Y, Yuan F, Cao J, Li S, Eickhoff SB, Zhang J. Brain grey matter volume reduction and anxiety-like behavior in lipopolysaccharide-induced chronic pulmonary inflammation rats: A structural MRI study with histological validation. Brain Behav Immun 2019; 76:182-197. [PMID: 30472482 DOI: 10.1016/j.bbi.2018.11.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 10/01/2018] [Accepted: 11/21/2018] [Indexed: 12/26/2022] Open
Abstract
While there have been multiple fMRI studies into the brain functional changes after acutely stimulated peripheral infection, knowledge for the effect of chronic peripheral infection on whole brain morphology is still quite limited. The present study was designed to investigate the brain structural and emotional changes after peripheral local infection initiated chronic systemic inflammation and the relationship between circulating inflammatory markers and brain grey matter. Specifically, in-vivo T2-weighted MRI was performed on rats with lipopolysaccharide (LPS)-induced chronic pulmonary inflammation (CPI) and those without. Grey matter volume was quantified using diffeomorphic anatomical registration through exponentiated lie (DARTEL) enhanced voxel-based morphometry followed by between-group comparison. Open field experiment was conducted to test the potential anxiety-like behaviors after CPI, along with the ELISA estimated inflammatory markers were correlated to grey matter volume. Guided by image findings, we undertook a focused histological investigation with immunefluorescence and Nissl staining. A widespread decrease of grey matter volume in CPI-model rats was revealed. 8 of the 12 measured inflammatory markers presented differential neuroanatomical correlation patterns with three of the pro-inflammatory cytokines (IL-1β, IL-6 and TNF-α) and CRP being the most notable. Lower grey matter volumes in some of the inflammatory markers related regions (amygdala, CA2 and cingulate cortex) were associated with more-severe anxiety-like behaviors. Furthermore, grey matter volumes in amygdala and CA3 were correlated negatively with the expressions of glial proteins (S100β and Nogo-A), while the grey matter volume in hypo-thalamus was changing positively with neural cell area. Overall, the neuroanatomical association patterns and the histopathology underpinning the MRI observations we demonstrated here would probably serve as one explanation for the cerebral and emotional deficits presented in the patients with CPI, which would furthermore yield new insights into the adverse effects the many other systemic inflammation and inflammatory autoimmune diseases would pose on brain morphology.
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Affiliation(s)
- Ji Chen
- Institute of Brain Diseases and Cognition, Medical College of Xiamen University, Xiamen, China; Institute of Neuroscience and Medicine, Brain and Behaviour (INM-7), Research Centre Jülich, Jülich, Germany; Institute of Systems Neuroscience, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany.
| | - Ya Yan
- Institute of Brain Diseases and Cognition, Medical College of Xiamen University, Xiamen, China
| | - Fengjuan Yuan
- Institute of Brain Diseases and Cognition, Medical College of Xiamen University, Xiamen, China
| | - Jianbo Cao
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen, China; Medical College of Xiamen University, Xiamen, China; Department of Radiology, University of Pennsylvania, Philadelphia, PA, USA
| | - Shanhua Li
- Institute of Brain Diseases and Cognition, Medical College of Xiamen University, Xiamen, China
| | - Simon B Eickhoff
- Institute of Neuroscience and Medicine, Brain and Behaviour (INM-7), Research Centre Jülich, Jülich, Germany; Institute of Systems Neuroscience, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Jiaxing Zhang
- Institute of Brain Diseases and Cognition, Medical College of Xiamen University, Xiamen, China.
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17
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Ottino-González J, Jurado MA, García-García I, Segura B, Marqués-Iturria I, Sender-Palacios MJ, Tor E, Prats-Soteras X, Caldú X, Junqué C, Pasternak O, Garolera M. Allostatic load and disordered white matter microstructure in overweight adults. Sci Rep 2018; 8:15898. [PMID: 30367110 PMCID: PMC6203765 DOI: 10.1038/s41598-018-34219-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 10/12/2018] [Indexed: 12/29/2022] Open
Abstract
Overweight and stress are both related to brain structural abnormalities. The allostatic load model states that frequent disruption of homeostasis is inherently linked to oxidative stress and inflammatory responses that in turn can damage the brain. However, the effects of the allostatic load on the central nervous system remain largely unknown. The current study aimed to assess the relationship between the allostatic load and the composition of whole-brain white matter tracts in overweight subjects. Additionally, we have also tested for grey matter changes regarding allostatic load increase. Thirty-one overweight-to-obese adults and 21 lean controls participated in the study. Our results showed that overweight participants presented higher allostatic load indexes. Such increases correlated with lower fractional anisotropy in the inferior fronto-occipital fasciculi and the right anterior corona radiata, as well as with grey matter reductions in the left precentral gyrus, the left lateral occipital gyrus, and the right pars opercularis. These results suggest that an otherwise healthy overweight status is linked to long-term biological changes potentially harmful to the brain.
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Affiliation(s)
- J Ottino-González
- Departament de Psicologia Clínica i Psicobiologia, Universitat de Barcelona, Barcelona, Spain
- Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca Sant Joan de Déu (IRSJD), Barcelona, Spain
| | - M A Jurado
- Departament de Psicologia Clínica i Psicobiologia, Universitat de Barcelona, Barcelona, Spain.
- Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain.
- Institut de Recerca Sant Joan de Déu (IRSJD), Barcelona, Spain.
| | - I García-García
- Montreal Neurological Institute, McGill University, Montreal, QC, Canada
| | - B Segura
- Departament de Medicina, Universitat de Barcelona, Barcelona, Spain
- Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - I Marqués-Iturria
- Departament de Psicologia Clínica i Psicobiologia, Universitat de Barcelona, Barcelona, Spain
| | - M J Sender-Palacios
- CAP Terrassa Nord, Consorci Sanitari de Terrassa, Barcelona, Spain
- Brain, Cognition and Behavior Clinical Research Group, Consorci Sanitari de Terrassa, Barcelona, Spain
| | - E Tor
- CAP Terrassa Nord, Consorci Sanitari de Terrassa, Barcelona, Spain
- Brain, Cognition and Behavior Clinical Research Group, Consorci Sanitari de Terrassa, Barcelona, Spain
| | - X Prats-Soteras
- Departament de Psicologia Clínica i Psicobiologia, Universitat de Barcelona, Barcelona, Spain
- Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca Sant Joan de Déu (IRSJD), Barcelona, Spain
| | - X Caldú
- Departament de Psicologia Clínica i Psicobiologia, Universitat de Barcelona, Barcelona, Spain
- Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca Sant Joan de Déu (IRSJD), Barcelona, Spain
| | - C Junqué
- Departament de Medicina, Universitat de Barcelona, Barcelona, Spain
- Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - O Pasternak
- Departments of Psychiatry and Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - M Garolera
- Unitat de Neuropsicologia, Hospital de Terrassa, Consorci Sanitari de Terrassa, Barcelona, Spain
- Brain, Cognition and Behavior Clinical Research Group, Consorci Sanitari de Terrassa, Barcelona, Spain
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18
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Zhou R, Wang F, Zhao G, Xia W, Peng D, Mao R, Xu J, Wang Z, Hong W, Zhang C, Wang Y, Su Y, Huang J, Yang T, Wang J, Chen J, Palaniyappan L, Fang Y. Effects of tumor necrosis factor-α polymorphism on the brain structural changes of the patients with major depressive disorder. Transl Psychiatry 2018; 8:217. [PMID: 30310056 PMCID: PMC6181976 DOI: 10.1038/s41398-018-0256-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 07/30/2018] [Accepted: 08/05/2018] [Indexed: 12/26/2022] Open
Abstract
Single Nucleotide Polymorphic (SNP) variations of proinflammatory cytokines such as Tumor Necrosis Factor-α (TNF-α) have been reported to be closely associated with the major depressive disorder (MDD). However, it is unclear if proinflammatory genetic burden adversely affects the regional gray matter volume in patients with MDD. The aim of this study was to test whether rs1799724, an SNP of TNF-α, contributes to the neuroanatomical changes in MDD. In this cross-sectional study, a total of 144 MDD patients and 111 healthy controls (HC) well matched for age, sex and education were recruited from Shanghai Mental Health Center. Voxel-based morphometry (VBM) followed by graph theory based structural covariance analysis was applied to locate diagnosis x genotype interactions. Irrespective of diagnosis, individuals with the high-risk genotype (T-carriers) had reduced volume in left angular gyrus (main effect of genotype). Diagnosis x genotype interaction was exclusively localized to the visual cortex (right superior occipital gyrus). The same region also showed reduced volume in patients with MDD than HC (main effect of diagnosis), with this effect being most pronounced in patients carrying the high-risk genotype. However, neither global nor regional network of structural covariance was found to have group difference. In conclusion, a genetic variation which can increase TNF-α expression selectively affects the anatomy of the visual cortex among the depressed subjects, with no effect on the topographical organization of multiple cortical regions. This supports the notion that anatomical changes in depression are in part influenced by the genetic determinants of inflammatory activity.
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Affiliation(s)
- Rubai Zhou
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China ,0000 0004 0368 8293grid.16821.3cDepartment of EEG & Neuroimaging, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China ,0000 0004 1936 8884grid.39381.30Robarts Research Institute& The Brain and Mind Institute, University of Western Ontario, London, ON Canada
| | - Fan Wang
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Guoqing Zhao
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China ,0000 0004 1769 9639grid.460018.bDepartment of Psychology, Provincial Hospital Affiliated to Shandong University, Jinan, 250021 China
| | - Weiping Xia
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China ,0000 0004 0368 8293grid.16821.3cDepartment of Medical Psychology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Daihui Peng
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ruizhi Mao
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jingjing Xu
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zuowei Wang
- Hongkou District Mental Health Center of Shanghai, Shanghai, China
| | - Wu Hong
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chen Zhang
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yong Wang
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yousong Su
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jia Huang
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Tao Yang
- 0000 0004 0368 8293grid.16821.3cDivision of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jijun Wang
- Shanghai Key Laboratory of Psychotic disorders, Shanghai, China. .,Department of EEG & Neuroimaging, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China. .,Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai, China. .,Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China.
| | - Jun Chen
- Division of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China. .,CAS Center for Excellence in Brain Science and Intelligence Technology, Shanghai, China. .,Shanghai Key Laboratory of Psychotic disorders, Shanghai, China.
| | - Lena Palaniyappan
- Robarts Research Institute& The Brain and Mind Institute, University of Western Ontario, London, ON, Canada. .,Department of Psychiatry, University of Western Ontario, London, ON, Canada. .,Lawson Health Research Institute, London, ON, Canada.
| | - Yiru Fang
- Division of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China. .,CAS Center for Excellence in Brain Science and Intelligence Technology, Shanghai, China. .,Shanghai Key Laboratory of Psychotic disorders, Shanghai, China.
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19
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Ottino-González J, Jurado MA, García-García I, Segura B, Marqués-Iturria I, Sender-Palacios MJ, Tor E, Prats-Soteras X, Caldú X, Junqué C, Garolera M. Allostatic Load Is Linked to Cortical Thickness Changes Depending on Body-Weight Status. Front Hum Neurosci 2017; 11:639. [PMID: 29375342 PMCID: PMC5770747 DOI: 10.3389/fnhum.2017.00639] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 12/15/2017] [Indexed: 12/11/2022] Open
Abstract
Objective: Overweight (body mass index or BMI ≥ 25 kg/m2) and stress interact with each other in complex ways. Overweight promotes chronic low-inflammation states, while stress is known to mediate caloric intake. Both conditions are linked to several avoidable health problems and to cognitive decline, brain atrophy, and dementia. Since it was proposed as a framework for the onset of mental illness, the allostatic load model has received increasing attention. Although changes in health and cognition related to overweight and stress are well-documented separately, the association between allostatic load and brain integrity has not been addressed in depth, especially among overweight subjects. Method: Thirty-four healthy overweight-to-obese and 29 lean adults underwent blood testing, neuropsychological examination, and magnetic resonance imaging to assess the relationship between cortical thickness and allostatic load, represented as an index of 15 biomarkers (this is, systolic and diastolic arterial tension, glycated hemoglobin, glucose, creatinine, total cholesterol, HDL and LDL cholesterol, triglycerides, c-reactive protein, interleukin-6, insulin, cortisol, fibrinogen, and leptin). Results: Allostatic load indexes showed widespread positive and negative significant correlations (p < 0.01) with cortical thickness values depending on body-weight status. Conclusion: The increase of allostatic load is linked to changes in the gray matter composition of regions monitoring behavior, sensory-reward processing, and general cognitive function.
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Affiliation(s)
- Jonatan Ottino-González
- Departament de Psicologia Clínica i Psicobiologia, Universitat de Barcelona, Barcelona, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain.,Institut de Recerca Pediàtrica Hospital Sant Joan de Déu, Barcelona, Spain
| | - María A Jurado
- Departament de Psicologia Clínica i Psicobiologia, Universitat de Barcelona, Barcelona, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain.,Institut de Recerca Pediàtrica Hospital Sant Joan de Déu, Barcelona, Spain
| | | | - Bàrbara Segura
- Departament de Medicina, Universitat de Barcelona, Barcelona, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Idoia Marqués-Iturria
- Departament de Psicologia Clínica i Psicobiologia, Universitat de Barcelona, Barcelona, Spain
| | - María J Sender-Palacios
- CAP Terrassa Nord, Consorci Sanitari de Terrassa, Barcelona, Spain.,Brain, Cognition and Behavior Clinical Research Group, Consorci Sanitari de Terrassa, Terrassa, Spain
| | - Encarnació Tor
- CAP Terrassa Nord, Consorci Sanitari de Terrassa, Barcelona, Spain.,Brain, Cognition and Behavior Clinical Research Group, Consorci Sanitari de Terrassa, Terrassa, Spain
| | - Xavier Prats-Soteras
- Departament de Psicologia Clínica i Psicobiologia, Universitat de Barcelona, Barcelona, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain.,Institut de Recerca Pediàtrica Hospital Sant Joan de Déu, Barcelona, Spain
| | - Xavier Caldú
- Departament de Psicologia Clínica i Psicobiologia, Universitat de Barcelona, Barcelona, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain.,Institut de Recerca Pediàtrica Hospital Sant Joan de Déu, Barcelona, Spain
| | - Carme Junqué
- Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain.,Departament de Medicina, Universitat de Barcelona, Barcelona, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Maite Garolera
- Brain, Cognition and Behavior Clinical Research Group, Consorci Sanitari de Terrassa, Terrassa, Spain.,Unitat de Neuropsicologia, Hospital de Terrassa, Consorci Sanitari de Terrassa, Barcelona, Spain
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Walker KA, Hoogeveen RC, Folsom AR, Ballantyne CM, Knopman DS, Windham BG, Jack CR, Gottesman RF. Midlife systemic inflammatory markers are associated with late-life brain volume: The ARIC study. Neurology 2017; 89:2262-2270. [PMID: 29093073 PMCID: PMC5705246 DOI: 10.1212/wnl.0000000000004688] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 09/08/2017] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To clarify the temporal relationship between systemic inflammation and neurodegeneration, we examined whether a higher level of circulating inflammatory markers during midlife was associated with smaller brain volumes in late life using a large biracial prospective cohort study. METHODS Plasma levels of systemic inflammatory markers (fibrinogen, albumin, white blood cell count, von Willebrand factor, and Factor VIII) were assessed at baseline in 1,633 participants (mean age 53 [5] years, 60% female, 27% African American) enrolled in the Atherosclerosis Risk in Communities Study. Using all 5 inflammatory markers, an inflammation composite score was created for each participant. We assessed episodic memory and regional brain volumes, using 3T MRI, 24 years later. RESULTS Each SD increase in midlife inflammation composite score was associated with 1,788 mm3 greater ventricular (p = 0.013), 110 mm3 smaller hippocampal (p = 0.013), 519 mm3 smaller occipital (p = 0.009), and 532 mm3 smaller Alzheimer disease signature region (p = 0.008) volumes, and reduced episodic memory (p = 0.046) 24 years later. Compared to participants with no elevated (4th quartile) midlife inflammatory markers, participants with elevations in 3 or more markers had, on average, 5% smaller hippocampal and Alzheimer disease signature region volumes. The association between midlife inflammation and late-life brain volume was modified by age and race, whereby younger participants and white participants with higher levels of systemic inflammation during midlife were more likely to show reduced brain volumes subsequently. CONCLUSIONS Our prospective findings provide evidence for what may be an early contributory role of systemic inflammation in neurodegeneration and cognitive aging.
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Affiliation(s)
- Keenan A Walker
- From the Departments of Neurology (K.A.W., R.F.G.) and Epidemiology (R.F.G.), Johns Hopkins University School of Medicine, Baltimore, MD; Section of Cardiology (R.C.H., C.M.B.), Baylor College of Medicine; Center for Cardiovascular Disease Prevention (R.C.H., C.M.B.), Houston Methodist DeBakey Heart and Vascular Center, TX; Division of Epidemiology and Community Health (A.R.F.), School of Public Health, University of Minnesota, Minneapolis; Departments of Neurology (D.S.K.) and Radiology (C.R.J.), Mayo Clinic, Rochester, MN; and Department of Medicine (B.G.W.), University of Mississippi Medical Center, Jackson.
| | - Ron C Hoogeveen
- From the Departments of Neurology (K.A.W., R.F.G.) and Epidemiology (R.F.G.), Johns Hopkins University School of Medicine, Baltimore, MD; Section of Cardiology (R.C.H., C.M.B.), Baylor College of Medicine; Center for Cardiovascular Disease Prevention (R.C.H., C.M.B.), Houston Methodist DeBakey Heart and Vascular Center, TX; Division of Epidemiology and Community Health (A.R.F.), School of Public Health, University of Minnesota, Minneapolis; Departments of Neurology (D.S.K.) and Radiology (C.R.J.), Mayo Clinic, Rochester, MN; and Department of Medicine (B.G.W.), University of Mississippi Medical Center, Jackson
| | - Aaron R Folsom
- From the Departments of Neurology (K.A.W., R.F.G.) and Epidemiology (R.F.G.), Johns Hopkins University School of Medicine, Baltimore, MD; Section of Cardiology (R.C.H., C.M.B.), Baylor College of Medicine; Center for Cardiovascular Disease Prevention (R.C.H., C.M.B.), Houston Methodist DeBakey Heart and Vascular Center, TX; Division of Epidemiology and Community Health (A.R.F.), School of Public Health, University of Minnesota, Minneapolis; Departments of Neurology (D.S.K.) and Radiology (C.R.J.), Mayo Clinic, Rochester, MN; and Department of Medicine (B.G.W.), University of Mississippi Medical Center, Jackson
| | - Christie M Ballantyne
- From the Departments of Neurology (K.A.W., R.F.G.) and Epidemiology (R.F.G.), Johns Hopkins University School of Medicine, Baltimore, MD; Section of Cardiology (R.C.H., C.M.B.), Baylor College of Medicine; Center for Cardiovascular Disease Prevention (R.C.H., C.M.B.), Houston Methodist DeBakey Heart and Vascular Center, TX; Division of Epidemiology and Community Health (A.R.F.), School of Public Health, University of Minnesota, Minneapolis; Departments of Neurology (D.S.K.) and Radiology (C.R.J.), Mayo Clinic, Rochester, MN; and Department of Medicine (B.G.W.), University of Mississippi Medical Center, Jackson
| | - David S Knopman
- From the Departments of Neurology (K.A.W., R.F.G.) and Epidemiology (R.F.G.), Johns Hopkins University School of Medicine, Baltimore, MD; Section of Cardiology (R.C.H., C.M.B.), Baylor College of Medicine; Center for Cardiovascular Disease Prevention (R.C.H., C.M.B.), Houston Methodist DeBakey Heart and Vascular Center, TX; Division of Epidemiology and Community Health (A.R.F.), School of Public Health, University of Minnesota, Minneapolis; Departments of Neurology (D.S.K.) and Radiology (C.R.J.), Mayo Clinic, Rochester, MN; and Department of Medicine (B.G.W.), University of Mississippi Medical Center, Jackson
| | - B Gwen Windham
- From the Departments of Neurology (K.A.W., R.F.G.) and Epidemiology (R.F.G.), Johns Hopkins University School of Medicine, Baltimore, MD; Section of Cardiology (R.C.H., C.M.B.), Baylor College of Medicine; Center for Cardiovascular Disease Prevention (R.C.H., C.M.B.), Houston Methodist DeBakey Heart and Vascular Center, TX; Division of Epidemiology and Community Health (A.R.F.), School of Public Health, University of Minnesota, Minneapolis; Departments of Neurology (D.S.K.) and Radiology (C.R.J.), Mayo Clinic, Rochester, MN; and Department of Medicine (B.G.W.), University of Mississippi Medical Center, Jackson
| | - Clifford R Jack
- From the Departments of Neurology (K.A.W., R.F.G.) and Epidemiology (R.F.G.), Johns Hopkins University School of Medicine, Baltimore, MD; Section of Cardiology (R.C.H., C.M.B.), Baylor College of Medicine; Center for Cardiovascular Disease Prevention (R.C.H., C.M.B.), Houston Methodist DeBakey Heart and Vascular Center, TX; Division of Epidemiology and Community Health (A.R.F.), School of Public Health, University of Minnesota, Minneapolis; Departments of Neurology (D.S.K.) and Radiology (C.R.J.), Mayo Clinic, Rochester, MN; and Department of Medicine (B.G.W.), University of Mississippi Medical Center, Jackson
| | - Rebecca F Gottesman
- From the Departments of Neurology (K.A.W., R.F.G.) and Epidemiology (R.F.G.), Johns Hopkins University School of Medicine, Baltimore, MD; Section of Cardiology (R.C.H., C.M.B.), Baylor College of Medicine; Center for Cardiovascular Disease Prevention (R.C.H., C.M.B.), Houston Methodist DeBakey Heart and Vascular Center, TX; Division of Epidemiology and Community Health (A.R.F.), School of Public Health, University of Minnesota, Minneapolis; Departments of Neurology (D.S.K.) and Radiology (C.R.J.), Mayo Clinic, Rochester, MN; and Department of Medicine (B.G.W.), University of Mississippi Medical Center, Jackson
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21
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Gu Y, Vorburger R, Scarmeas N, Luchsinger JA, Manly JJ, Schupf N, Mayeux R, Brickman AM. Circulating inflammatory biomarkers in relation to brain structural measurements in a non-demented elderly population. Brain Behav Immun 2017; 65:150-160. [PMID: 28457809 PMCID: PMC5537030 DOI: 10.1016/j.bbi.2017.04.022] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 04/24/2017] [Accepted: 04/26/2017] [Indexed: 10/19/2022] Open
Abstract
The aim of this investigation was to determine whether circulating inflammatory biomarkers c-reactive protein (CRP), interleukin-6 (IL6), and alpha 1-antichymotrypsin (ACT) were related to structural brain measures assessed by magnetic resonance imaging (MRI). High-resolution structural MRI was collected on 680 non-demented elderly (mean age 80.1years) participants of a community-based, multiethnic cohort. Approximately three quarters of these participants also had peripheral inflammatory biomarkers (CRP, IL6, and ACT) measured using ELISA. Structural measures including brain volumes and cortical thickness (with both global and regional measures) were derived from MRI scans, and repeated MRI measures were obtained after 4.5years. Mean fractional anisotropy was used as the indicator of white matter integrity assessed with diffusion tensor imaging. We examined the association of inflammatory biomarkers with brain volume, cortical thickness, and white matter integrity using regression models adjusted for age, gender, ethnicity, education, APOE genotype, and intracranial volume. A doubling in CRP (b=-2.48, p=0.002) was associated with a smaller total gray matter volume, equivalent to approximately 1.5years of aging. A doubling in IL6 was associated with smaller total brain volume (b=-14.96, p<0.0001), equivalent to approximately 9years of aging. Higher IL6 was also associated with smaller gray matter (b=-6.52, p=0.002) and white matter volumes (b=-7.47, p=0.004). The volumes of most cortical regions including frontal, occipital, parietal, temporal, as well as subcortical regions including pallidum and thalamus were associated with IL6. In a model additionally adjusted for depression, vascular factors, BMI, and smoking status, the association between IL6 and brain volumes remained, and a doubling in ACT was marginally associated with 0.054 (p=0.001) millimeter thinner mean cortical thickness, equivalent to that of approximately 2.7years of aging. None of the biomarkers was associated with mean fractional anisotropy or longitudinal change of brain volumes and thickness. Among older adults, increased circulating inflammatory biomarkers were associated with smaller brain volume and cortical thickness but not the white matter tract integrity. Our preliminary findings suggest that peripheral inflammatory processes may be involved in the brain atrophy in the elderly.
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Affiliation(s)
- Yian Gu
- The Taub Institute for Research in Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY, United States; The Department of Neurology, Columbia University, New York, NY, United States.
| | - Robert Vorburger
- The Taub Institute for Research in Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY
| | - Nikolaos Scarmeas
- The Taub Institute for Research in Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY,The Department of Neurology, Columbia University, New York, NY,The Gertrude H. Sergievsky Center, Columbia University, New York, NY,National and Kapodistrian University of Athens Medical School, Athens, Greece
| | - José A. Luchsinger
- The Taub Institute for Research in Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY,The Department of Neurology, Columbia University, New York, NY,Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY,The Department of Epidemiology, Joseph P. Mailman School of Public Health, Columbia University, New York, NY
| | - Jennifer J. Manly
- The Taub Institute for Research in Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY,The Department of Neurology, Columbia University, New York, NY,The Gertrude H. Sergievsky Center, Columbia University, New York, NY
| | - Nicole Schupf
- The Taub Institute for Research in Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY,The Department of Neurology, Columbia University, New York, NY,The Department of Epidemiology, Joseph P. Mailman School of Public Health, Columbia University, New York, NY
| | - Richard Mayeux
- The Taub Institute for Research in Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY,The Department of Neurology, Columbia University, New York, NY,The Gertrude H. Sergievsky Center, Columbia University, New York, NY,The Department of Epidemiology, Joseph P. Mailman School of Public Health, Columbia University, New York, NY
| | - Adam M. Brickman
- The Taub Institute for Research in Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY,The Department of Neurology, Columbia University, New York, NY,The Gertrude H. Sergievsky Center, Columbia University, New York, NY
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22
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Niraula A, Sheridan JF, Godbout JP. Microglia Priming with Aging and Stress. Neuropsychopharmacology 2017; 42:318-333. [PMID: 27604565 PMCID: PMC5143497 DOI: 10.1038/npp.2016.185] [Citation(s) in RCA: 247] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 08/22/2016] [Accepted: 08/25/2016] [Indexed: 01/08/2023]
Abstract
The population of aged individuals is increasing worldwide and this has significant health and socio-economic implications. Clinical and experimental studies on aging have discovered myriad changes in the brain, including reduced neurogenesis, increased synaptic aberrations, higher metabolic stress, and augmented inflammation. In rodent models of aging, these alterations are associated with cognitive decline, neurobehavioral deficits, and increased reactivity to immune challenges. In rodents, caloric restriction and young blood-induced revitalization reverses the behavioral effects of aging. The increased inflammation in the aged brain is attributed, in part, to the resident population of microglia. For example, microglia of the aged brain are marked by dystrophic morphology, elevated expression of inflammatory markers, and diminished expression of neuroprotective factors. Importantly, the heightened inflammatory profile of microglia in aging is associated with a 'sensitized' or 'primed' phenotype. Mounting evidence points to a causal link between the primed profile of the aged brain and vulnerability to secondary insults, including infections and psychological stress. Conversely, psychological stress may also induce aging-like sensitization of microglia and increase reactivity to secondary challenges. This review delves into the characteristics of neuroinflammatory signaling and microglial sensitization in aging, its implications in psychological stress, and interventions that reverse aging-associated deficits.
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Affiliation(s)
- Anzela Niraula
- Department of Neuroscience, The Ohio State University, Columbus, OH, USA,Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - John F Sheridan
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA,Division of Biosciences, The Ohio State University, College of Dentistry, Columbus, OH, USA
| | - Jonathan P Godbout
- Department of Neuroscience, The Ohio State University, Columbus, OH, USA,Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA,Center for Brain and Spinal Cord Repair, The Ohio State University, Columbus, OH, USA,Department of Neuroscience, The Ohio State University, 231 IBMR Bld, 460 Medical Center Drive Columbus, OH 43210, USA, Tel: +614 293 3456, Fax: +614 366 2097, E-mail:
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23
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Papenberg G, Ferencz B, Mangialasche F, Mecocci P, Cecchetti R, Kalpouzos G, Fratiglioni L, Bäckman L. Physical activity and inflammation: effects on gray-matter volume and cognitive decline in aging. Hum Brain Mapp 2016; 37:3462-73. [PMID: 27159568 DOI: 10.1002/hbm.23252] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 04/25/2016] [Accepted: 04/27/2016] [Indexed: 01/02/2023] Open
Abstract
Physical activity has been positively associated with gray-matter integrity. In contrast, pro-inflammatory cytokines seem to have negative effects on the aging brain and have been related to dementia. It was investigated whether an inactive lifestyle and high levels of inflammation resulted in smaller gray-matter volumes and predicted cognitive decline across 6 years in a population-based study of older adults (n = 414). Self-reported physical activity (fitness-enhancing, health-enhancing, inadequate) was linked to gray-matter volume, such that individuals with inadequate physical activity had the least gray matter. There were no overall associations between different pro-and anti-inflammatory markers (IL-1β, IL-6, IL-10, IL-12p40, IL-12p70, G-CSF, and TNF-α) and gray-matter integrity. However, persons with inadequate activity and high levels of the pro-inflammatory marker IL-12p40 had smaller volumes of lateral prefrontal cortex and hippocampus and declined more on the Mini-Mental State Examination test over 6 years compared with physically inactive individuals with low levels of IL-12p40 and to more physically active persons, irrespective of their levels of IL-12p40. These patterns of data suggested that inflammation was particularly detrimental in inactive older adults and may exacerbate the negative effects of physical inactivity on brain and cognition in old age. Hum Brain Mapp 37:3462-3473, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Goran Papenberg
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
| | - Beata Ferencz
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
| | - Francesca Mangialasche
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
| | - Patrizia Mecocci
- Section of Gerontology and Geriatrics, Department of Medicine, University of Perugia, Perugia, Italy
| | - Roberta Cecchetti
- Section of Gerontology and Geriatrics, Department of Medicine, University of Perugia, Perugia, Italy
| | - Grégoria Kalpouzos
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
| | - Laura Fratiglioni
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden.,Stockholm Gerontology Research Center, Stockholm, Sweden
| | - Lars Bäckman
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden.,Stockholm Gerontology Research Center, Stockholm, Sweden
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