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Sex-specific relationships between obesity, physical activity, and gray and white matter volume in cognitively unimpaired older adults. GeroScience 2023:10.1007/s11357-023-00734-4. [PMID: 36781598 PMCID: PMC10400512 DOI: 10.1007/s11357-023-00734-4] [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: 08/09/2022] [Accepted: 01/17/2023] [Indexed: 02/15/2023] Open
Abstract
Independently, obesity and physical activity (PA) influence cerebral structure in aging, yet their interaction has not been investigated. We examined sex differences in the relationships among PA, obesity, and cerebral structure in aging with 340 participants who completed magnetic resonance imaging (MRI) acquisition to quantify grey matter volume (GMV) and white matter volume (WMV). Height and weight were measured to calculate body mass index (BMI). A PA questionnaire was used to estimate weekly Metabolic Equivalents. The relationships between BMI, PA, and their interaction on GMV Regions of Interest (ROIs) and WMV ROIs were examined. Increased BMI was associated with higher GMV in females, an inverse U relationship was found between PA and GMV in females, and the interaction indicated that regardless of BMI greater PA was associated with enhanced GMV. Males demonstrated an inverse U shape between BMI and GMV, and in males with high PA and had normal weight demonstrated greater GMV than normal weight low PA revealed by the interaction. WMV ROIs had a linear relationship with moderate PA in females, whereas in males, increased BMI was associated with lower WMV as well as a positive relationship with moderate PA and WMV. Males and females have unique relationships among GMV, PA and BMI, suggesting sex-aggregated analyses may lead to biased or non-significant results. These results suggest higher BMI, and PA are associated with increased GMV in females, uniquely different from males, highlighting the importance of sex-disaggregated models. Future work should include other imaging parameters, such as perfusion, to identify if these differences co-occur in the same regions as GMV.
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Uhlig M, Reinelt JD, Lauckner ME, Kumral D, Schaare HL, Mildner T, Babayan A, Möller HE, Engert V, Villringer A, Gaebler M. Rapid volumetric brain changes after acute psychosocial stress. Neuroimage 2023; 265:119760. [PMID: 36427754 DOI: 10.1016/j.neuroimage.2022.119760] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 11/14/2022] [Accepted: 11/21/2022] [Indexed: 11/25/2022] Open
Abstract
Stress is an important trigger for brain plasticity: Acute stress can rapidly affect brain activity and functional connectivity, and chronic or pathological stress has been associated with structural brain changes. Measures of structural magnetic resonance imaging (MRI) can be modified by short-term motor learning or visual stimulation, suggesting that they also capture rapid brain changes. Here, we investigated volumetric brain changes (together with changes in T1 relaxation rate and cerebral blood flow) after acute stress in humans as well as their relation to psychophysiological stress measures. Sixty-seven healthy men (25.8±2.7 years) completed a standardized psychosocial laboratory stressor (Trier Social Stress Test) or a control version while blood, saliva, heart rate, and psychometrics were sampled. Structural MRI (T1 mapping / MP2RAGE sequence) at 3T was acquired 45 min before and 90 min after intervention onset. Grey matter volume (GMV) changes were analysed using voxel-based morphometry. Associations with endocrine, autonomic, and subjective stress measures were tested with linear models. We found significant group-by-time interactions in several brain clusters including anterior/mid-cingulate cortices and bilateral insula: GMV was increased in the stress group relative to the control group, in which several clusters showed a GMV decrease. We found a significant group-by-time interaction for cerebral blood flow, and a main effect of time for T1 values (longitudinal relaxation time). In addition, GMV changes were significantly associated with state anxiety and heart rate variability changes. Such rapid GMV changes assessed with VBM may be induced by local tissue adaptations to changes in energy demand following neural activity. Our findings suggest that endogenous brain changes are counteracted by acute psychosocial stress, which emphasizes the importance of considering homeodynamic processes and generally highlights the influence of stress on the brain.
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Affiliation(s)
- Marie Uhlig
- Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany; International Max Planck Research School NeuroCom, Leipzig, Germany.
| | - Janis D Reinelt
- Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
| | - Mark E Lauckner
- Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany; Independent Research Group "Adaptive Memory", Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany; Medical Faculty of Leipzig University, Leipzig, Germany
| | - Deniz Kumral
- Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany; Institute of Psychology, Neuropsychology, University of Freiburg, Freiburg im Breisgau, Germany
| | - H Lina Schaare
- Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany; Otto Hahn Group "Cognitive Neurogenetics", Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany; Institute of Neuroscience and Medicine (INM-7: Brain and Behaviour), Research Centre Jülich, Germany
| | - Toralf Mildner
- NMR Methods & Development Group, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
| | - Anahit Babayan
- Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany; MindBrainBody Institute at the Berlin School of Mind and Brain, Faculty of Philosophy, Humboldt-Universität zu Berlin, Berlin, German
| | - Harald E Möller
- NMR Methods & Development Group, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
| | - Veronika Engert
- Institute of Psychosocial Medicine, Psychotherapy and Psychooncology, Jena University Hospital, Friedrich-Schiller University, Jena, Germany; Independent Research Group "Social Stress and Family Health", Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
| | - Arno Villringer
- Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany; MindBrainBody Institute at the Berlin School of Mind and Brain, Faculty of Philosophy, Humboldt-Universität zu Berlin, Berlin, German
| | - Michael Gaebler
- Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany; MindBrainBody Institute at the Berlin School of Mind and Brain, Faculty of Philosophy, Humboldt-Universität zu Berlin, Berlin, German
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3
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Zeighami Y, Dadar M, Daoust J, Pelletier M, Biertho L, Bouvet-Bouchard L, Fulton S, Tchernof A, Dagher A, Richard D, Evans A, Michaud A. Impact of Weight Loss on Brain Age: Improved Brain Health Following Bariatric Surgery. Neuroimage 2022; 259:119415. [PMID: 35760293 DOI: 10.1016/j.neuroimage.2022.119415] [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: 12/10/2021] [Revised: 06/17/2022] [Accepted: 06/23/2022] [Indexed: 10/17/2022] Open
Abstract
Individuals living with obesity tend to have increased brain age, reflecting poorer brain health likely due to grey and white matter atrophy related to obesity. However, it is unclear if older brain age associated with obesity can be reversed following weight loss and cardiometabolic health improvement. The aim of this study was to assess the impact of weight loss and cardiometabolic improvement following bariatric surgery on brain health, as measured by change in brain age estimated based on voxel-based morphometry (VBM) measurements. We used three distinct datasets to perform this study: 1) CamCAN dataset to train the brain age prediction model, 2) Human Connectome Project (HCP) dataset to investigate whether individuals with obesity have greater brain age than individuals with normal weight, and 3) pre-surgery, as well as 4, 12, and 24 month post-surgery data from participants (n=87, age: 44.0±9.2 years, BMI: 43.9±4.2 kg/m2) who underwent a bariatric surgery to investigate whether weight loss and cardiometabolic improvement as a result of bariatric surgery lowers the brain age. As expected, our results from the HCP dataset showed a higher brain age for individuals with obesity compared to individuals with normal weight (T-value = 7.08, p-value < 0.0001). We also found significant improvement in brain health, indicated by a decrease of 2.9 and 5.6 years in adjusted delta age at 12 and 24 months following bariatric surgery compared to baseline (p-value < 0.0005 for both). While the overall effect seemed to be driven by a global change across all brain regions and not from a specific region, our exploratory analysis showed lower delta age in certain brain regions (mainly in somatomotor, visual, and ventral attention networks) at 24 months. This reduced age was also associated with post-surgery improvements in BMI, systolic/diastolic blood pressure, and HOMA-IR (T-valueBMI=4.29, T-valueSBP=4.67, T-valueDBP=4.12, T-valueHOMA-IR=3.16, all p-values < 0.05). In conclusion, these results suggest that obesity-related brain health abnormalities (as measured by delta age) might be reversed by bariatric surgery-induced weight loss and widespread improvements in cardiometabolic alterations.
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Affiliation(s)
- Yashar Zeighami
- Douglas Research Centre, Department of Psychiatry, McGill University, Montreal, Canada; Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal, Canada.
| | - Mahsa Dadar
- Douglas Research Centre, Department of Psychiatry, McGill University, Montreal, Canada
| | - Justine Daoust
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - Mélissa Pelletier
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - Laurent Biertho
- Département de chirurgie générale, Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - Léonie Bouvet-Bouchard
- Département de chirurgie générale, Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - Stephanie Fulton
- Centre de Recherche du CHUM, Department of Nutrition, Université de Montréal, Montreal Diabetes Research Center, Montreal, QC, Canada
| | - André Tchernof
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - Alain Dagher
- Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal, Canada
| | - Denis Richard
- Département de chirurgie générale, Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - Alan Evans
- Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal, Canada
| | - Andréanne Michaud
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada.
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Miletić S, Bazin PL, Isherwood SJS, Keuken MC, Alkemade A, Forstmann BU. Charting human subcortical maturation across the adult lifespan with in vivo 7 T MRI. Neuroimage 2022; 249:118872. [PMID: 34999202 DOI: 10.1016/j.neuroimage.2022.118872] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 12/20/2021] [Accepted: 01/03/2022] [Indexed: 12/26/2022] Open
Abstract
The human subcortex comprises hundreds of unique structures. Subcortical functioning is crucial for behavior, and disrupted function is observed in common neurodegenerative diseases. Despite their importance, human subcortical structures continue to be difficult to study in vivo. Here we provide a detailed account of 17 prominent subcortical structures and ventricles, describing their approximate iron and myelin contents, morphometry, and their age-related changes across the normal adult lifespan. The results provide compelling insights into the heterogeneity and intricate age-related alterations of these structures. They also show that the locations of many structures shift across the lifespan, which is of direct relevance for the use of standard magnetic resonance imaging atlases. The results further our understanding of subcortical morphometry and neuroimaging properties, and of normal aging processes which ultimately can improve our understanding of neurodegeneration.
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Affiliation(s)
- Steven Miletić
- University of Amsterdam, Department of Psychology, Integrative Model-based Cognitive Neuroscience research unit (IMCN), Nieuwe Achtergracht 129B, Amsterdam 1001 NK, the Netherlands.
| | - Pierre-Louis Bazin
- University of Amsterdam, Department of Psychology, Integrative Model-based Cognitive Neuroscience research unit (IMCN), Nieuwe Achtergracht 129B, Amsterdam 1001 NK, the Netherlands; Max Planck Institute for Human Cognitive and Brain Sciences, Departments of Neurophysics and Neurology, Stephanstraße 1A, Leipzig, Germany
| | - Scott J S Isherwood
- University of Amsterdam, Department of Psychology, Integrative Model-based Cognitive Neuroscience research unit (IMCN), Nieuwe Achtergracht 129B, Amsterdam 1001 NK, the Netherlands
| | - Max C Keuken
- University of Amsterdam, Department of Psychology, Integrative Model-based Cognitive Neuroscience research unit (IMCN), Nieuwe Achtergracht 129B, Amsterdam 1001 NK, the Netherlands
| | - Anneke Alkemade
- University of Amsterdam, Department of Psychology, Integrative Model-based Cognitive Neuroscience research unit (IMCN), Nieuwe Achtergracht 129B, Amsterdam 1001 NK, the Netherlands
| | - Birte U Forstmann
- University of Amsterdam, Department of Psychology, Integrative Model-based Cognitive Neuroscience research unit (IMCN), Nieuwe Achtergracht 129B, Amsterdam 1001 NK, the Netherlands.
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Broessner G, Ellerbrock I, Menz MM, Frank F, Verius M, Gaser C, May A. Repetitive T1 Imaging Influences Gray Matter Volume Estimations in Structural Brain Imaging. Front Neurol 2021; 12:755749. [PMID: 34777226 PMCID: PMC8581175 DOI: 10.3389/fneur.2021.755749] [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: 08/09/2021] [Accepted: 09/30/2021] [Indexed: 11/13/2022] Open
Abstract
Voxel-based morphometry (VBM) is a widely used tool for studying structural patterns of brain plasticity, brain development and disease. The source of the T1-signal changes is not understood. Most of these changes are discussed to represent loss or possibly gain of brain gray matter and recent publications speculate also about non-structural changes affecting T1-signal. We investigated the potential of pain stimulation to ultra-short-term alter gray matter signal changes in pain relevant brain regions in healthy volunteers using a longitudinal design. Immediately following regional nociceptive input, we detected significant gray matter volume (GMV) changes in central pain processing areas, i.e. anterior cingulate and insula cortex. However, similar results were observed in a control group using the identical time intervals but without nociceptive painful input. These GMV changes could be reproduced in almost 100 scanning sessions enrolling 72 healthy individuals comprising repetitive magnetization-prepared rapid gradient-echo (MPRAGE) sequences. These data suggest that short-term longitudinal repetitive MPRAGE may produce significant GMV changes without any intervention. Future studies investigating brain plasticity should focus and specifically report a consistent timing at which time-point during the experiment the T1-weighted scan is conducted. There is a necessity of a control group for longitudinal imaging studies.
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Affiliation(s)
- Gregor Broessner
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria
| | - Isabel Ellerbrock
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Mareike M Menz
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Florian Frank
- Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria
| | - Michael Verius
- Department of Neuroradiology, Medical University Innsbruck, Innsbruck, Austria
| | - Christian Gaser
- Departments of Neurology and Psychiatry, Jena University Hospital, Jena, Germany
| | - Arne May
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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6
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Zeighami Y, Iceta S, Dadar M, Pelletier M, Nadeau M, Biertho L, Lafortune A, Tchernof A, Fulton S, Evans A, Richard D, Dagher A, Michaud A. Spontaneous neural activity changes after bariatric surgery: A resting-state fMRI study. Neuroimage 2021; 241:118419. [PMID: 34302967 DOI: 10.1016/j.neuroimage.2021.118419] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 06/24/2021] [Accepted: 07/20/2021] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Metabolic disorders associated with obesity could lead to alterations in brain structure and function. Whether these changes can be reversed after weight loss is unclear. Bariatric surgery provides a unique opportunity to address these questions because it induces marked weight loss and metabolic improvements which in turn may impact the brain in a longitudinal fashion. Previous studies found widespread changes in grey matter (GM) and white matter (WM) after bariatric surgery. However, findings regarding changes in spontaneous neural activity following surgery, as assessed with the fractional amplitude of low frequency fluctuations (fALFF) and regional homogeneity of neural activity (ReHo), are scarce and heterogenous. In this study, we used a longitudinal design to examine the changes in spontaneous neural activity after bariatric surgery (comparing pre- to post-surgery), and to determine whether these changes are related to cardiometabolic variables. METHODS The study included 57 participants with severe obesity (mean BMI=43.1 ± 4.3 kg/m2) who underwent sleeve gastrectomy (SG), biliopancreatic diversion with duodenal switch (BPD), or Roux-en-Y gastric bypass (RYGB), scanned prior to bariatric surgery and at follow-up visits of 4 months (N = 36), 12 months (N = 29), and 24 months (N = 14) after surgery. We examined fALFF and ReHo measures across 1022 cortical and subcortical regions (based on combined Schaeffer-Xiao parcellations) using a linear mixed effect model. Voxel-based morphometry (VBM) based on T1-weighted images was also used to measure GM density in the same regions. We also used an independent sample from the Human Connectome Project (HCP) to assess regional differences between individuals who had normal-weight (N = 46) or severe obesity (N = 46). RESULTS We found a global increase in the fALFF signal with greater increase within dorsolateral prefrontal cortex, precuneus, inferior temporal gyrus, and visual cortex. This effect was more significant 4 months after surgery. The increase within dorsolateral prefrontal cortex, temporal gyrus, and visual cortex was more limited after 12 months and only present in the visual cortex after 24 months. These increases in neural activity measured by fALFF were also significantly associated with the increase in GM density following surgery. Furthermore, the increase in neural activity was significantly related to post-surgery weight loss and improvement in cardiometabolic variables, such as blood pressure. In the independent HCP sample, normal-weight participants had higher global and regional fALFF signals, mainly in dorsolateral/medial frontal cortex, precuneus and middle/inferior temporal gyrus compared to the obese participants. These BMI-related differences in fALFF were associated with the increase in fALFF 4 months post-surgery especially in regions involved in control, default mode and dorsal attention networks. CONCLUSIONS Bariatric surgery-induced weight loss and improvement in metabolic factors are associated with widespread global and regional increases in neural activity, as measured by fALFF signal. These findings alongside the higher fALFF signal in normal-weight participants compared to participants with severe obesity in an independent dataset suggest an early recovery in the neural activity signal level after the surgery.
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Affiliation(s)
- Yashar Zeighami
- Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal, Canada; Ludmer Centre for Neuroinformatics and Mental Health, McGill University, Montreal, Canada
| | - Sylvain Iceta
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - Mahsa Dadar
- CERVO Brain Research Center, Centre intégré universitaire santé et services sociaux de la Capitale Nationale, Université Laval, Québec, Canada
| | - Mélissa Pelletier
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - Mélanie Nadeau
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - Laurent Biertho
- Département de chirurgie générale, Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - Annie Lafortune
- Département de chirurgie générale, Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - André Tchernof
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - Stephanie Fulton
- Centre de Recherche du CHUM and Montreal Diabetes Research Center, Montreal, QC, Canada
| | - Alan Evans
- Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal, Canada; Ludmer Centre for Neuroinformatics and Mental Health, McGill University, Montreal, Canada
| | - Denis Richard
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada
| | - Alain Dagher
- Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal, Canada
| | - Andréanne Michaud
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Canada.
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Comparing the effect of cognitive vs. exercise training on brain MRI outcomes in healthy older adults: A systematic review. Neurosci Biobehav Rev 2021; 128:511-533. [PMID: 34245760 DOI: 10.1016/j.neubiorev.2021.07.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 06/30/2021] [Accepted: 07/05/2021] [Indexed: 11/21/2022]
Abstract
Aging is associated with cognitive decline. Importantly cognition and cerebral health is enhanced with interventions like cognitive (CT) and exercise training (ET). However, effects of CT and ET interventions on brain magnetic resonance imaging outcomes have never been compared systematically. Here, the primary objective was to critically and systematically compare CT to ET in healthy older adults on brain MRI outcomes. A total of 38 studies were included in the final review. Although results were mixed, patterns were identified: CT showed improvements in white matter microstructure, while ET demonstrated macrostructural enhancements, and both demonstrated changes to task-based BOLD signal changes. Importantly, beneficial effects for cognitive and cerebral outcomes were observed by almost all, regardless of intervention type. Overall, it is suggested that future work include more than one MRI outcome, and report all results including null. To better understand the MRI changes associated with CT or ET, more studies explicitly comparing interventions within the same domain (i.e. resistance vs. aerobic) and between domains (i.e. CT vs. ET) are needed.
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Tsvetanov KA, Henson RNA, Jones PS, Mutsaerts H, Fuhrmann D, Tyler LK, Rowe JB. The effects of age on resting-state BOLD signal variability is explained by cardiovascular and cerebrovascular factors. Psychophysiology 2021; 58:e13714. [PMID: 33210312 PMCID: PMC8244027 DOI: 10.1111/psyp.13714] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 07/27/2020] [Accepted: 09/28/2020] [Indexed: 12/18/2022]
Abstract
Accurate identification of brain function is necessary to understand neurocognitive aging, and thereby promote health and well-being. Many studies of neurocognitive aging have investigated brain function with the blood-oxygen level-dependent (BOLD) signal measured by functional magnetic resonance imaging. However, the BOLD signal is a composite of neural and vascular signals, which are differentially affected by aging. It is, therefore, essential to distinguish the age effects on vascular versus neural function. The BOLD signal variability at rest (known as resting state fluctuation amplitude, RSFA), is a safe, scalable, and robust means to calibrate vascular responsivity, as an alternative to breath-holding and hypercapnia. However, the use of RSFA for normalization of BOLD imaging assumes that age differences in RSFA reflecting only vascular factors, rather than age-related differences in neural function (activity) or neuronal loss (atrophy). Previous studies indicate that two vascular factors, cardiovascular health (CVH) and cerebrovascular function, are insufficient when used alone to fully explain age-related differences in RSFA. It remains possible that their joint consideration is required to fully capture age differences in RSFA. We tested the hypothesis that RSFA no longer varies with age after adjusting for a combination of cardiovascular and cerebrovascular measures. We also tested the hypothesis that RSFA variation with age is not associated with atrophy. We used data from the population-based, lifespan Cam-CAN cohort. After controlling for cardiovascular and cerebrovascular estimates alone, the residual variance in RSFA across individuals was significantly associated with age. However, when controlling for both cardiovascular and cerebrovascular estimates, the variance in RSFA was no longer associated with age. Grey matter volumes did not explain age differences in RSFA, after controlling for CVH. The results were consistent between voxel-level analysis and independent component analysis. Our findings indicate that cardiovascular and cerebrovascular signals are together sufficient predictors of age differences in RSFA. We suggest that RSFA can be used to separate vascular from neuronal factors, to characterize neurocognitive aging. We discuss the implications and make recommendations for the use of RSFA in the research of aging.
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Affiliation(s)
- Kamen A. Tsvetanov
- Department of Clinical NeurosciencesUniversity of CambridgeCambridgeUK
- Department of PsychologyCentre for Speech, Language and the BrainUniversity of CambridgeCambridgeUK
| | - Richard N. A. Henson
- Medical Research Council Cognition and Brain Sciences UnitCambridgeUK
- Department of PsychiatryUniversity of CambridgeCambridgeUK
| | - P. Simon Jones
- Department of PsychologyCentre for Speech, Language and the BrainUniversity of CambridgeCambridgeUK
| | - Henk Mutsaerts
- Department of Radiology and Nuclear MedicineAmsterdam University Medical CenterAmsterdamthe Netherlands
| | - Delia Fuhrmann
- Medical Research Council Cognition and Brain Sciences UnitCambridgeUK
| | - Lorraine K. Tyler
- Department of PsychologyCentre for Speech, Language and the BrainUniversity of CambridgeCambridgeUK
| | - Cam‐CAN
- Department of Clinical NeurosciencesUniversity of CambridgeCambridgeUK
- Department of PsychologyCentre for Speech, Language and the BrainUniversity of CambridgeCambridgeUK
| | - James B. Rowe
- Department of Clinical NeurosciencesUniversity of CambridgeCambridgeUK
- Medical Research Council Cognition and Brain Sciences UnitCambridgeUK
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A Multi-Modal MRI Analysis of Cortical Structure in Relation to Gender Dysphoria, Sexual Orientation, and Age in Adolescents. J Clin Med 2021; 10:jcm10020345. [PMID: 33477567 PMCID: PMC7831120 DOI: 10.3390/jcm10020345] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/20/2020] [Accepted: 12/23/2020] [Indexed: 01/18/2023] Open
Abstract
Gender dysphoria (GD) is characterized by distress due to an incongruence between experienced gender and sex assigned at birth. Sex-differentiated brain regions are hypothesized to reflect the experienced gender in GD and may play a role in sexual orientation development. Magnetic resonance brain images were acquired from 16 GD adolescents assigned female at birth (AFAB) not receiving hormone therapy, 17 cisgender girls, and 14 cisgender boys (ages 12–17 years) to examine three morphological and microstructural gray matter features in 76 brain regions: surface area (SA), cortical thickness (CT), and T1 relaxation time. Sexual orientation was represented by degree of androphilia-gynephilia and sexual attraction strength. Multivariate analyses found that cisgender boys had larger SA than cisgender girls and GD AFAB. Shorter T1, reflecting denser, macromolecule-rich tissue, correlated with older age and stronger gynephilia in cisgender boys and GD AFAB, and with stronger attractions in cisgender boys. Thus, cortical morphometry (mainly SA) was related to sex assigned at birth, but not experienced gender. Effects of experienced gender were found as similarities in correlation patterns in GD AFAB and cisgender boys in age and sexual orientation (mainly T1), indicating the need to consider developmental trajectories and sexual orientation in brain studies of GD.
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10
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Baranger DAA, Halchenko YO, Satz S, Ragozzino R, Iyengar S, Swartz HA, Manelis A. Aberrant levels of cortical myelin distinguish individuals with depressive disorders from healthy controls. NEUROIMAGE: CLINICAL 2021; 32:102790. [PMID: 34455188 PMCID: PMC8406024 DOI: 10.1016/j.nicl.2021.102790] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 07/05/2021] [Accepted: 08/11/2021] [Indexed: 01/21/2023] Open
Abstract
The association between depressive disorders and measures reflecting myelin content is underexplored, despite growing evidence of associations with white matter tract integrity. We characterized the T1w/T2w ratio using the Glasser atlas in 39 UD and 47 HC participants (ages = 19-44, 75% female). A logistic elastic net regularized regression with nested cross-validation and a subsequent linear discriminant analysis conducted on held-out samples were used to select brain regions and classify patients vs. healthy controls (HC). True-label model performance was compared against permuted-label model performance. The T1w/T2w ratio distinguished patients from HC with 68% accuracy (p < 0.001; sensitivity = 63.8%, specificity = 71.5%). Brain regions contributing to this classification performance were located in the orbitofrontal cortex, anterior cingulate, extended visual, and auditory cortices, and showed statistically significant differences in the T1w/T2w ratio for patients vs. HC. As the T1w/T2w ratio is thought to characterize cortical myelin, patterns of cortical myelin in these regions may be a biomarker distinguishing individuals with depressive disorders from HC.
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Affiliation(s)
- David A A Baranger
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA, USA.
| | | | - Skye Satz
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Rachel Ragozzino
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Satish Iyengar
- Department of Statistics, University of Pittsburgh, Pittsburgh, PA, USA
| | - Holly A Swartz
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Anna Manelis
- Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA, USA.
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11
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Baeken C, Wu G, Sackeim HA. Accelerated iTBS treatment applied to the left DLPFC in depressed patients results in a rapid volume increase in the left hippocampal dentate gyrus, not driven by brain perfusion. Brain Stimul 2020; 13:1211-1217. [DOI: 10.1016/j.brs.2020.05.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 05/15/2020] [Accepted: 05/29/2020] [Indexed: 02/06/2023] Open
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12
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Intzandt B, Sabra D, Foster C, Desjardins-Crépeau L, Hoge RD, Steele CJ, Bherer L, Gauthier CJ. Higher cardiovascular fitness level is associated with lower cerebrovascular reactivity and perfusion in healthy older adults. J Cereb Blood Flow Metab 2020; 40:1468-1481. [PMID: 31342831 PMCID: PMC7308519 DOI: 10.1177/0271678x19862873] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Aging is accompanied by vascular and structural changes in the brain, which include decreased grey matter volume (GMV), cerebral blood flow (CBF), and cerebrovascular reactivity (CVR). Enhanced fitness in aging has been related to preservation of GMV and CBF, and in some cases CVR, although there are contradictory relationships reported between CVR and fitness. To gain a better understanding of the complex interplay between fitness and GMV, CBF and CVR, the present study assessed these factors concurrently. Data from 50 participants, aged 55 to 72, were used to derive GMV, CBF, CVR and VO2peak. Results revealed that lower CVR was associated with higher VO2peak throughout large areas of the cerebral cortex. Within these regions lower fitness was associated with higher CBF and a faster hemodynamic response to hypercapnia. Overall, our results indicate that the relationships between age, fitness, cerebral health and cerebral hemodynamics are complex, likely involving changes in chemosensitivity and autoregulation in addition to changes in arterial stiffness. Future studies should collect other physiological outcomes in parallel with quantitative imaging, such as measures of chemosensitivity and autoregulation, to further understand the intricate effects of fitness on the aging brain, and how this may bias quantitative measures of cerebral health.
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Affiliation(s)
- Brittany Intzandt
- INDI Department, Concordia University, Montreal, Canada.,PERFORM Centre, Concordia University, Montreal, Canada.,Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, Canada
| | - Dalia Sabra
- Départment de Médecine, Université de Montréal, Canada
| | - Catherine Foster
- PERFORM Centre, Concordia University, Montreal, Canada.,Physics Department, Concordia University, Montreal, Canada
| | - Laurence Desjardins-Crépeau
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, Canada.,Centre de Recherche de l'Institut de Cardiologie de Montréal, Montréal, Canada
| | - Richard D Hoge
- Department of Neurology and Neurosurgery, McGill University, Canada
| | - Christopher J Steele
- Department of Psychology, Concordia University, Montreal, Canada.,Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
| | - Louis Bherer
- PERFORM Centre, Concordia University, Montreal, Canada.,Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, Canada.,Départment de Médecine, Université de Montréal, Canada.,Centre de Recherche de l'Institut de Cardiologie de Montréal, Montréal, Canada
| | - Claudine J Gauthier
- PERFORM Centre, Concordia University, Montreal, Canada.,Physics Department, Concordia University, Montreal, Canada.,Centre de Recherche de l'Institut de Cardiologie de Montréal, Montréal, Canada
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13
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Neuroanatomical changes in white and grey matter after sleeve gastrectomy. Neuroimage 2020; 213:116696. [DOI: 10.1016/j.neuroimage.2020.116696] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 02/27/2020] [Indexed: 12/12/2022] Open
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14
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van der Kleij LA, De Vis JB, de Bresser J, Hendrikse J, Siero JCW. Arterial CO 2 pressure changes during hypercapnia are associated with changes in brain parenchymal volume. Eur Radiol Exp 2020; 4:17. [PMID: 32147754 PMCID: PMC7061094 DOI: 10.1186/s41747-020-0144-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 01/23/2020] [Indexed: 11/10/2022] Open
Abstract
The Monro-Kellie hypothesis (MKH) states that volume changes in any intracranial component (blood, brain tissue, cerebrospinal fluid) should be counterbalanced by a co-occurring opposite change to maintain intracranial pressure within the fixed volume of the cranium. In this feasibility study, we investigate the MKH application to structural magnetic resonance imaging (MRI) in observing compensating intracranial volume changes during hypercapnia, which causes an increase in cerebral blood volume. Seven healthy subjects aged from 24 to 64 years (median 32), 4 males and 3 females, underwent a 3-T three-dimensional T1-weighted MRI under normocapnia and under hypercapnia. Intracranial tissue volumes were computed. According to the MKH, the significant increase in measured brain parenchymal volume (median 6.0 mL; interquartile range 4.5, 8.5; p = 0.016) during hypercapnia co-occurred with a decrease in intracranial cerebrospinal fluid (median -10.0 mL; interquartile range -13.5, -6.5; p = 0.034). These results convey several implications: (i) blood volume changes either caused by disorders, anaesthesia, or medication can affect outcome of brain volumetric studies; (ii) besides probing tissue displacement, this approach may assess the brain cerebrovascular reactivity. Future studies should explore the use of alternative sequences, such as three-dimensional T2-weighted imaging, for improved quantification of hypercapnia-induced volume changes.
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Affiliation(s)
- Lisa A van der Kleij
- Department of Radiology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3508 GA, Utrecht, The Netherlands.
| | - Jill B De Vis
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Jeroen de Bresser
- Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Jeroen Hendrikse
- Department of Radiology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3508 GA, Utrecht, The Netherlands
| | - Jeroen C W Siero
- Department of Radiology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3508 GA, Utrecht, The Netherlands.,Spinoza Center for Neuroimaging, Amsterdam, The Netherlands
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15
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Nierhaus T, Vidaurre C, Sannelli C, Mueller K, Villringer A. Immediate brain plasticity after one hour of brain–computer interface (BCI). J Physiol 2019; 599:2435-2451. [DOI: 10.1113/jp278118] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 09/30/2019] [Indexed: 12/18/2022] Open
Affiliation(s)
- Till Nierhaus
- Department of Neurology Max Planck Institute for Human Cognitive and Brain Sciences Leipzig Germany
- Neurocomputation and Neuroimaging Unit (NNU), Department of Education and Psychology Freie Universität Berlin Berlin Germany
| | - Carmen Vidaurre
- Machine Learning Group EE & Computer Science Faculty TU‐Berlin Germany
- Department Statistics, Informatics and Mathematics Public University of Navarra Spain
| | - Claudia Sannelli
- Machine Learning Group EE & Computer Science Faculty TU‐Berlin Germany
| | - Klaus‐Robert Mueller
- Machine Learning Group EE & Computer Science Faculty TU‐Berlin Germany
- Department of Brain and Cognitive Engineering Korea University Anam‐dong Seongbuk‐gu Seoul 02841 Korea
- Max Planck Institute for Informatics Saarbrücken Germany
| | - Arno Villringer
- Department of Neurology Max Planck Institute for Human Cognitive and Brain Sciences Leipzig Germany
- MindBrainBody Institute at Berlin School of Mind and Brain Charité Universitätsmedizin Berlin and Humboldt‐University Berlin Germany
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16
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Badji A, Sabra D, Bherer L, Cohen-Adad J, Girouard H, Gauthier CJ. Arterial stiffness and brain integrity: A review of MRI findings. Ageing Res Rev 2019; 53:100907. [PMID: 31063866 DOI: 10.1016/j.arr.2019.05.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/30/2019] [Accepted: 05/02/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND Given the increasing incidence of vascular diseases and dementia, a better understanding of the cerebrovascular changes induced by arterial stiffness is important for early identification of white and gray matter abnormalities that might antedate the appearance of clinical cognitive symptoms. Here, we review the evidence from neuroimaging demonstrating the impact of arterial stiffness on the aging brain. METHOD This review presents findings from recent studies examining the association between arterial stiffness, cognitive function, cerebral hypoperfusion, and markers of neuronal fiber integrity using a variety of MRI techniques. RESULTS Overall, changes associated with arterial stiffness indicates that the corpus callosum, the internal capsule and the corona radiata may be the most vulnerable regions to microvascular damage. In addition, the microstructural integrity of these regions appears to be associated with cognitive performance. Changes in gray matter structure have also been found to be associated with arterial stiffness and are present as early as the 5th decade. Moreover, low cerebral perfusion has been associated with arterial stiffness as well as lower cognitive performance in age-sensitive tasks such as executive function. CONCLUSION Considering the established relationship between arterial stiffness, brain and cognition, this review highlights the need for future studies of brain structure and function in aging to implement measurements of arterial stiffness in parallel with quantitative imaging.
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Affiliation(s)
- Atef Badji
- NeuroPoly Lab, Institute of Biomedical Engineering, Polytechnique Montreal, Montréal, QC, Canada; Neuroimaging Functional Unit (UNF), Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, QC, Canada; Department of Neurosciences, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Dalia Sabra
- Neuroimaging Functional Unit (UNF), Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, QC, Canada; Department of Biomedical Science, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Louis Bherer
- Neuroimaging Functional Unit (UNF), Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, QC, Canada; Research Center, Montreal Heart Institute, Montréal, QC, Canada; Department of Medicine, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Julien Cohen-Adad
- NeuroPoly Lab, Institute of Biomedical Engineering, Polytechnique Montreal, Montréal, QC, Canada; Neuroimaging Functional Unit (UNF), Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, QC, Canada; Department of Neurosciences, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Hélène Girouard
- Neuroimaging Functional Unit (UNF), Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, QC, Canada; Department of Pharmacology and Physiology, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Claudine J Gauthier
- Physics Department, Concordia University, Montréal, QC, Canada; PERFORM Centre, Concordia University, Montréal, QC, Canada; Research Center, Montreal Heart Institute, Montréal, QC, Canada.
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17
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Filo S, Shtangel O, Salamon N, Kol A, Weisinger B, Shifman S, Mezer AA. Disentangling molecular alterations from water-content changes in the aging human brain using quantitative MRI. Nat Commun 2019; 10:3403. [PMID: 31363094 PMCID: PMC6667463 DOI: 10.1038/s41467-019-11319-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 07/05/2019] [Indexed: 11/30/2022] Open
Abstract
It is an open question whether aging-related changes throughout the brain are driven by a common factor or result from several distinct molecular mechanisms. Quantitative magnetic resonance imaging (qMRI) provides biophysical parametric measurements allowing for non-invasive mapping of the aging human brain. However, qMRI measurements change in response to both molecular composition and water content. Here, we present a tissue relaxivity approach that disentangles these two tissue components and decodes molecular information from the MRI signal. Our approach enables us to reveal the molecular composition of lipid samples and predict lipidomics measurements of the brain. It produces unique molecular signatures across the brain, which are correlated with specific gene-expression profiles. We uncover region-specific molecular changes associated with brain aging. These changes are independent from other MRI aging markers. Our approach opens the door to a quantitative characterization of the biological sources for aging, that until now was possible only post-mortem.
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Affiliation(s)
- Shir Filo
- The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Oshrat Shtangel
- The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Noga Salamon
- The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Adi Kol
- The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Batsheva Weisinger
- The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Sagiv Shifman
- Department of Genetics, The Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Aviv A Mezer
- The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel.
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18
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Schaare HL, Kharabian Masouleh S, Beyer F, Kumral D, Uhlig M, Reinelt JD, Reiter AMF, Lampe L, Babayan A, Erbey M, Roebbig J, Schroeter ML, Okon-Singer H, Müller K, Mendes N, Margulies DS, Witte AV, Gaebler M, Villringer A. Association of peripheral blood pressure with gray matter volume in 19- to 40-year-old adults. Neurology 2019; 92:e758-e773. [PMID: 30674602 DOI: 10.1212/wnl.0000000000006947] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 10/15/2018] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVE To test whether elevated blood pressure (BP) relates to gray matter (GM) volume (GMV) changes in young adults who had not previously been diagnosed with hypertension (systolic BP [SBP]/diastolic BP [DBP] ≥140/90 mm Hg). METHODS We associated BP with GMV from structural 3T T1-weighted MRI of 423 healthy adults between 19 and 40 years of age (mean age 27.7 ± 5.3 years, 177 women, SBP/DBP 123.2/73.4 ± 12.2/8.5 mm Hg). Data originated from 4 previously unpublished cross-sectional studies conducted in Leipzig, Germany. We performed voxel-based morphometry on each study separately and combined results in image-based meta-analyses (IBMA) to assess cumulative effects across studies. Resting BP was assigned to 1 of 4 categories: (1) SBP <120 and DBP <80 mm Hg, (2) SBP 120-129 or DBP 80-84 mm Hg, (3) SBP 130-139 or DBP 85-89 mm Hg, (4) SBP ≥140 or DBP ≥90 mm Hg. RESULTS IBMA yielded the following results: (1) lower regional GMV was correlated with higher peripheral BP; (2) lower GMV was found with higher BP when comparing individuals in subhypertensive categories 3 and 2, respectively, to those in category 1; (3) lower BP-related GMV was found in regions including hippocampus, amygdala, thalamus, frontal, and parietal structures (e.g., precuneus). CONCLUSION BP ≥120/80 mm Hg was associated with lower GMV in regions that have previously been related to GM decline in older individuals with manifest hypertension. Our study shows that BP-associated GM alterations emerge continuously across the range of BP and earlier in adulthood than previously assumed. This suggests that treating hypertension or maintaining lower BP in early adulthood might be essential for preventing the pathophysiologic cascade of asymptomatic cerebrovascular disease to symptomatic end-organ damage, such as stroke or dementia.
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Affiliation(s)
- H Lina Schaare
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany.
| | - Shahrzad Kharabian Masouleh
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Frauke Beyer
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Deniz Kumral
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Marie Uhlig
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Janis D Reinelt
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Andrea M F Reiter
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Leonie Lampe
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Anahit Babayan
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Miray Erbey
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Josefin Roebbig
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Matthias L Schroeter
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Hadas Okon-Singer
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Karsten Müller
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Natacha Mendes
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Daniel S Margulies
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - A Veronica Witte
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Michael Gaebler
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
| | - Arno Villringer
- From the Department of Neurology (H.L.S., S.K.M., F.B., D.K., M.U., J.D.R., A.M.F.R., L.L., A.B., M.E., J.R., M.L.S., A.V.W., M.G., A.V.), Max Planck Research Group for Neuroanatomy & Connectivity (N.M., D.S.M.), and Nuclear Magnetic Resonance Group (K.M.), Max Planck Institute for Human Cognitive and Brain Sciences; International Max Planck Research School NeuroCom (H.L.S., M.U.), Leipzig; MindBrainBody Institute at Berlin School of Mind and Brain (D.K., A.B., M.E., M.G., A.V.), Charité & Humboldt Universität zu Berlin; Lifespan Developmental Neuroscience (A.M.F.R.), Technische Universität Dresden; Leipzig Research Centre for Civilization Diseases (LIFE) (M.L.S., M.G., A.V.), Clinic for Cognitive Neurology (M.L.S., A.V.), and Collaborative Research Centre 1052 'Obesity Mechanisms,' Subproject A1, Faculty of Medicine (F.B., A.V.W., A.V.), University of Leipzig, Germany; Department of Psychology (H.O.-S.), University of Haifa, Israel; and Center for Stroke Research Berlin (A.V.), Charité-Universitätsmedizin Berlin, Germany
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Taş YÇ, Solaroğlu İ, Gürsoy-Özdemir Y. Spreading Depolarization Waves in Neurological Diseases: A Short Review about its Pathophysiology and Clinical Relevance. Curr Neuropharmacol 2019; 17:151-164. [PMID: 28925885 PMCID: PMC6343201 DOI: 10.2174/1570159x15666170915160707] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 09/03/2017] [Accepted: 09/09/2017] [Indexed: 02/05/2023] Open
Abstract
Lesion growth following acutely injured brain tissue after stroke, subarachnoid hemorrhage and traumatic brain injury is an important issue and a new target area for promising therapeutic interventions. Spreading depolarization or peri-lesion depolarization waves were demonstrated as one of the significant contributors of continued lesion growth. In this short review, we discuss the pathophysiology for SD forming events and try to list findings detected in neurological disorders like migraine, stroke, subarachnoid hemorrhage and traumatic brain injury in both human as well as experimental studies. Pharmacological and non-pharmacological treatment strategies are highlighted and future directions and research limitations are discussed.
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Affiliation(s)
| | | | - Yasemin Gürsoy-Özdemir
- Address correspondence to these authors at the Department of Neurosurgery, School of Medicine, Koç University, İstanbul, Turkey; Tel: +90 850 250 8250; E-mails: ,
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20
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Bernier M, Cunnane SC, Whittingstall K. The morphology of the human cerebrovascular system. Hum Brain Mapp 2018; 39:4962-4975. [PMID: 30265762 DOI: 10.1002/hbm.24337] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 07/02/2018] [Accepted: 07/19/2018] [Indexed: 12/13/2022] Open
Abstract
While several methodologies exist for quantifying gray and white matter properties in humans, relatively little is known regarding the spatial organization and the intersubject variability of cerebral vessels. To resolve this, we developed a fast, open-source processing algorithm using advanced vessel segmentation schemes and iterative nonlinear registration to isolate, extract, and quantify cerebral vessels in susceptibility weighting imaging (SWI) and time-of-flight angiography (TOF-MRA) datasets acquired in a large cohort (n = 42) of healthy individuals. From this, whole-brain venous and arterial probabilistic maps were generated along with the computation of regional densities and diameters within regions based on popular anatomical and functional atlases. The results show that cerebral vasculature is highly heterogeneous, displaying disproportionally large vessel densities in brain areas such as the anterior and posterior cingulate, cuneus, precuneus, parahippocampus, insula, and temporal gyri. On average, venous densities were slightly higher and less variable across subjects than arterial. Moreover, regional variations in both venous and arterial density were significantly correlated to cortical thickness (R = 0.42). This publicly available new atlas of the human cerebrovascular system provides a first step toward quantifying morphological changes in the diseased brain and serving as a potential regression tool in fMRI analysis.
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Affiliation(s)
- Michaël Bernier
- Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Stephen C Cunnane
- Department of Medicine, Université de Sherbrooke, Sherbrooke, Québec, Canada.,Department of Pharmacology and Physiology, Université de Sherbrooke, Sherbrooke, Québec, Canada.,Research Center on Aging, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Kevin Whittingstall
- Department of Radiology, Université de Sherbrooke, Sherbrooke, Québec, Canada.,CR-CHUS, Université de Sherbrooke, Sherbrooke, Québec, Canada
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21
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Repeated exposure to sucrose for procedural pain in mouse pups leads to long-term widespread brain alterations. Pain 2018; 158:1586-1598. [PMID: 28715355 DOI: 10.1097/j.pain.0000000000000961] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Oral sucrose is administered routinely to reduce pain of minor procedures in premature infants and is recommended as standard care in international guidelines. No human or animal studies on effects of early repeated sucrose exposure on long-term brain development have been done in the context of pain. We evaluated the effects of repeated neonatal sucrose treatment before an intervention on long-term brain structure in mouse pups. Neonatal C57Bl/6J mice (n = 109) were randomly assigned to one of 2 treatments (vehicle vs sucrose) and one of 3 interventions (handling, touch, or needle-prick). Mice received 10 interventions daily from postnatal day 1 to 6 (P1-6). A dose of vehicle or 24% sucrose was given orally 2 minutes before each intervention. At P85-95, brains were scanned using a multichannel 7.0 T MRI. Volumes of 159 independent brain regions were obtained. Early repetitive sucrose exposure in mice (after correcting for whole brain volume and multiple comparisons) lead to smaller white matter volumes in the corpus callosum, stria terminalis, and fimbria (P < 0.0001). Cortical and subcortical gray matter was also affected by sucrose with smaller volumes of hippocampus and cerebellum (P < 0.0001). These significant changes in adult brain were found irrespective of the type of intervention in the neonatal period. This study provides the first evidence of long-term adverse effects of repetitive sucrose exposure and raises concerns for the use of this standard pain management practice during a period of rapid brain development in very preterm infants.
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22
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Guma E, Rocchetti J, Devenyi GA, Tanti A, Mathieu A, Lerch JP, Elgbeili G, Courcot B, Mechawar N, Chakravarty MM, Giros B. Regional brain volume changes following chronic antipsychotic administration are mediated by the dopamine D2 receptor. Neuroimage 2018; 176:226-238. [PMID: 29704613 DOI: 10.1016/j.neuroimage.2018.04.054] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 04/17/2018] [Accepted: 04/23/2018] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Neuroanatomical alterations are well established in patients suffering from schizophrenia, however the extent to which these changes are attributable to illness, antipsychotic drugs (APDs), or their interaction is unclear. APDs have been extremely effective for treatment of positive symptoms in major psychotic disorders. Their therapeutic effects are mediated, in part, through blockade of D2-like dopamine (DA) receptors, i.e. the D2, D3 and D4 dopamine receptors. Furthermore, the dependency of neuroanatomical change on DA system function and D2-like receptors has yet to be explored. METHODS We undertook a preclinical longitudinal study to examine the effects of typical (haloperidol (HAL)) and atypical (clozapine (CLZ)) APDs in wild type (WT) and dopamine D2 knockout (D2KO) mice over 9-weeks using structural magnetic resonance imaging (MRI). RESULTS Chronic typical APD administration in WT mice was associated with reductions in total brain (p = 0.009) and prelimbic area (PL) (p = 0.02) volumes following 9-weeks, and an increase in striatal volume (p = 0.04) after six weeks. These APD-induced changes were not present in D2KOs, where, at baseline, we observed significantly smaller overall brain volume (p < 0.01), thinner cortices (q < 0.05), and enlarged striata (q < 0.05). Stereological assessment revealed increased glial density in PL area of HAL treated wild types. Interestingly, in WT and D2KO mice, chronic CLZ administration caused more limited changes in brain structure. CONCLUSIONS Our results present evidence for the role of D2 DA receptors in structural alterations induced by the administration of the typical APD HAL and that chronic administration of CLZ has a limited influence on brain structure.
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Affiliation(s)
- Elisa Guma
- Department of Psychiatry & Integrated Program in Neuroscience, McGill University, 845 Sherbrooke St W, Montreal, QC, H3A 0G4 Canada; Cerebral Imaging Center, Douglas Mental Health University Institute, Verdun, Quebec, H4H 1R3, Canada
| | - Jill Rocchetti
- Department of Psychiatry & Integrated Program in Neuroscience, McGill University, 845 Sherbrooke St W, Montreal, QC, H3A 0G4 Canada
| | - Gabriel A Devenyi
- Cerebral Imaging Center, Douglas Mental Health University Institute, Verdun, Quebec, H4H 1R3, Canada
| | - Arnaud Tanti
- McGill Group for Suicide Studies, Department of Psychiatry, McGill University, Douglas Mental Health University Institute, Montreal, QC, Canada
| | - Axel Mathieu
- Cerebral Imaging Center, Douglas Mental Health University Institute, Verdun, Quebec, H4H 1R3, Canada
| | - Jason P Lerch
- Mouse Imaging Center - Hospital for Sick Children, Department of Medical Biophysics -University of Toronto, Toronto, Ontario, M5T 3H7, Canada
| | - Guillaume Elgbeili
- Department of Psychiatry & Integrated Program in Neuroscience, McGill University, 845 Sherbrooke St W, Montreal, QC, H3A 0G4 Canada
| | - Blandine Courcot
- Cerebral Imaging Center, Douglas Mental Health University Institute, Verdun, Quebec, H4H 1R3, Canada
| | - Naguib Mechawar
- McGill Group for Suicide Studies, Department of Psychiatry, McGill University, Douglas Mental Health University Institute, Montreal, QC, Canada
| | - M Mallar Chakravarty
- Department of Psychiatry & Integrated Program in Neuroscience, McGill University, 845 Sherbrooke St W, Montreal, QC, H3A 0G4 Canada; Cerebral Imaging Center, Douglas Mental Health University Institute, Verdun, Quebec, H4H 1R3, Canada; Department of Biological and Biomedical Engineering, McGill University, 845 Sherbrooke St W, Montreal, QC, H3A 0G4, Canada
| | - Bruno Giros
- Department of Psychiatry & Integrated Program in Neuroscience, McGill University, 845 Sherbrooke St W, Montreal, QC, H3A 0G4 Canada; Sorbonne University, Neuroscience Paris Seine, CNRS UMR 8246, INSERM U 1130, UPMC Univ Paris 06, UM119, 75005, Paris, France.
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23
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Carey D, Caprini F, Allen M, Lutti A, Weiskopf N, Rees G, Callaghan MF, Dick F. Quantitative MRI provides markers of intra-, inter-regional, and age-related differences in young adult cortical microstructure. Neuroimage 2017; 182:429-440. [PMID: 29203455 PMCID: PMC6189523 DOI: 10.1016/j.neuroimage.2017.11.066] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 10/19/2017] [Accepted: 11/29/2017] [Indexed: 12/17/2022] Open
Abstract
Measuring the structural composition of the cortex is critical to understanding typical development, yet few investigations in humans have charted markers in vivo that are sensitive to tissue microstructural attributes. Here, we used a well-validated quantitative MR protocol to measure four parameters (R1, MT, R2*, PD*) that differ in their sensitivity to facets of the tissue microstructural environment (R1, MT: myelin, macromolecular content; R2*: myelin, paramagnetic ions, i.e., iron; PD*: free water content). Mapping these parameters across cortical regions in a young adult cohort (18–39 years, N = 93) revealed expected patterns of increased macromolecular content as well as reduced tissue water content in primary and primary adjacent cortical regions. Mapping across cortical depth within regions showed decreased expression of myelin and related processes – but increased tissue water content – when progressing from the grey/white to the grey/pial boundary, in all regions. Charting developmental change in cortical microstructure cross-sectionally, we found that parameters with sensitivity to tissue myelin (R1 & MT) showed linear increases with age across frontal and parietal cortex (change 0.5–1.0% per year). Overlap of robust age effects for both parameters emerged in left inferior frontal, right parietal and bilateral pre-central regions. Our findings afford an improved understanding of ontogeny in early adulthood and offer normative quantitative MR data for inter- and intra-cortical composition, which may be used as benchmarks in further studies. We mapped multi-parameter maps (MPMs) across and within cortical regions. We charted age effects (ages 18–39) on myelin and related processes. MPMs sensitive to myelin (R1, MT) showed elevated values in primary areas over most cortical depths. R2* map foci tended to overlap MPMs sensitive to myelin (R1, MT). R1 and MT increased with age (0.5–1.0% per year) at mid-depth in frontal and parietal cortex.
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Affiliation(s)
- Daniel Carey
- The Irish Longitudinal Study on Aging (TILDA), Trinity College Dublin, Dublin 2, Ireland; Centre for Brain and Cognitive Development (CBCD), Birkbeck College, University of London, UK.
| | - Francesco Caprini
- Centre for Brain and Cognitive Development (CBCD), Birkbeck College, University of London, UK
| | - Micah Allen
- Institute of Cognitive Neuroscience, University College London, Queen Square, London, UK; Wellcome Trust Centre for Neuroimaging, University College London, Queen Square, London, UK
| | - Antoine Lutti
- Institute of Cognitive Neuroscience, University College London, Queen Square, London, UK; Laboratoire de Recherche en Neuroimagerie - LREN, Departement des Neurosciences Cliniques, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
| | - Nikolaus Weiskopf
- Institute of Cognitive Neuroscience, University College London, Queen Square, London, UK; Department of Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
| | - Geraint Rees
- Institute of Cognitive Neuroscience, University College London, Queen Square, London, UK; Wellcome Trust Centre for Neuroimaging, University College London, Queen Square, London, UK
| | - Martina F Callaghan
- Institute of Cognitive Neuroscience, University College London, Queen Square, London, UK
| | - Frederic Dick
- Centre for Brain and Cognitive Development (CBCD), Birkbeck College, University of London, UK; Birkbeck/UCL Centre for Neuroimaging (BUCNI), 26 Bedford Way, London, UK
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