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Arai AE, Arai AL. Incident Cognitive Dysfunction Is Associated With Ischemic Heart Disease: Insights From the UK Biobank. JACC Cardiovasc Imaging 2023:S1936-878X(23)00141-9. [PMID: 37115160 DOI: 10.1016/j.jcmg.2023.02.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 02/17/2023] [Indexed: 04/29/2023]
Affiliation(s)
| | - Allison L Arai
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
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2
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Yu J, Zhu H, Kindy MS, Taheri S. The impact of a high-sodium diet regimen on cerebrovascular morphology and cerebral perfusion in Alzheimer's disease. CEREBRAL CIRCULATION - COGNITION AND BEHAVIOR 2023; 4:100161. [PMID: 36741272 PMCID: PMC9895990 DOI: 10.1016/j.cccb.2023.100161] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 12/05/2022] [Accepted: 01/27/2023] [Indexed: 01/30/2023]
Abstract
Introduction Various lifestyle factors such as chronic hypertension and a high-sodium diet regimen are shown to impact cerebrovascular morphology and structure. Unusual cerebrovascular morphological and structural changes may contribute to cerebral hypoperfusion in Alzheimer's disease (AD). The objective of this study was to examine whether a high-sodium diet mediates cerebrovascular morphology and cerebral perfusion alterations in AD. Methods Double transgenic mice harboring Aβ precursor protein (APPswe) and presenilin-1 (PSEN1) along with wild-type controls were divided into four groups. Group A (APP/PS1) and B (controls) were both fed a high-sodium (4.00%), while group C (APP/PS1) and D (controls) were both fed a low-sodium (0.08% a regular chow diet) for three months. Then, changes in regional cerebral perfusion and diffusion, cerebrovascular morphology, and structure were quantified. Results A 3-month high-sodium diet causes pyknosis and deep staining in hippocampal neurons and reduced vascular density in both hippocampal and cortical areas (p <0.001) of APP/PS1. Despite vascular density changes, cerebral perfusion was not increased markedly (p = 0.3) in this group, though it was increased more in wild-type controls (p = 0.022). Conclusion A high-sodium diet regimen causes cerebrovascular morphology alteration in APP/PS1 mouse model of AD.
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Affiliation(s)
- Jin Yu
- Department of Pharmaceutical Sciences, University of South Florida, Tampa, FL 33612, USA
| | - Hong Zhu
- Department of Pharmaceutical Sciences, University of South Florida, Tampa, FL 33612, USA
| | - Mark S. Kindy
- Department of Pharmaceutical Sciences, University of South Florida, Tampa, FL 33612, USA,James A. Haley VA Medical Center, Tampa, FL 33612, USA
| | - Saeid Taheri
- Department of Pharmaceutical Sciences, University of South Florida, Tampa, FL 33612, USA,USF Heart Institute, Tampa, FL 33612, USA,Corresponding author at: Department of Pharmaceutical Sciences, USF Heart Institute, University of South Florida, 12901 Bruce B. Downs Blvd., MDC 30, Tampa, FL 33612, USA.
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Yang Y, Zhang Q, Ren J, Zhu Q, Wang L, Zhang Y, Geng Z. Evolution of Brain Morphology in Spontaneously Hypertensive and Wistar-Kyoto Rats From Early Adulthood to Aging: A Longitudinal Magnetic Resonance Imaging Study. Front Aging Neurosci 2021; 13:757808. [PMID: 34916922 PMCID: PMC8670306 DOI: 10.3389/fnagi.2021.757808] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 11/08/2021] [Indexed: 11/21/2022] Open
Abstract
The influence of hypertension and aging alone on brain structure has been described extensively. Our understanding of the interaction of hypertension with aging to brain morphology is still limited. We aimed to detect the synergistic effects of hypertension and aging on brain morphology and to describe the evolution patterns of cerebral atrophy from spatial and temporal perspectives. In 8 spontaneously hypertensive rats (SHRs) and 5 Wistar-Kyoto rats, high-resolution magnetic resonance imaging scans were longitudinally acquired at 10, 24, 52, and 80 weeks. We analyzed the tissue volumes of gray matter, white matter, cerebral spinal fluid, and total intracranial volume (TIV), and then evaluated gray matter volume in detail using voxel-based morphometry (VBM) and region of interest-based methods. There were interactive effects on hypertension and aging in tissue volumes of gray matter, white matter, and TIV, of which gray matter atrophy was most pronounced, especially in elderly SHRs. We identified the vulnerable gray matter volume with combined effects of hypertension and aging in the septal region, bilateral caudate putamen, hippocampus, primary somatosensory cortex, cerebellum, periaqueductal gray, right accumbens nucleus, and thalamus. We automatically extracted the septal region, anterior cingulate cortex, primary somatosensory cortex, caudate putamen, hippocampus, and accumbens nucleus and revealed an inverted-U trajectory of volume change in SHRs, with volume increase at the early phase and decline at the late phase. Hypertension interacts with aging to affect brain volume changes such as severe atrophy in elderly SHRs.
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Affiliation(s)
- Yingying Yang
- Graduate School, Hebei Medical University, Shijiazhuang, China.,Department of Imaging, The First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Quan Zhang
- Tianjin Key Laboratory of Functional Imaging, Department of Radiology, Tianjin Medical University General Hospital, Tianjin, China
| | | | - Qingfeng Zhu
- Department of Medical Imaging, The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Lixin Wang
- Department of Medical Imaging, The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Yongzhi Zhang
- Graduate School, Hebei Medical University, Shijiazhuang, China
| | - Zuojun Geng
- Department of Medical Imaging, The Second Hospital of Hebei Medical University, Shijiazhuang, China
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4
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Willeman MN, Chawla MK, Zempare MA, Biwer LA, Hoang LT, Uprety AR, Fitzhugh MC, De Both M, Coleman PD, Trouard TP, Alexander GE, Mitchell KD, Barnes CA, Hale TM, Huentelman M. Gradual hypertension induction in middle-aged Cyp1a1-Ren2 transgenic rats produces significant impairments in spatial learning. Physiol Rep 2019; 7:e14010. [PMID: 30916484 PMCID: PMC6436186 DOI: 10.14814/phy2.14010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 12/16/2018] [Accepted: 12/18/2018] [Indexed: 12/30/2022] Open
Abstract
Hypertension is a major health concern in the developed world, and its prevalence increases with advancing age. The impact of hypertension on the function of the renal and cardiovascular systems is well studied; however, its influence on the brain regions important for cognition has garnered less attention. We utilized the Cyp1a1-Ren2 xenobiotic-inducible transgenic rat model to mimic both the age of onset and rate of induction of hypertension observed in humans. Male, 15-month-old transgenic rats were fed 0.15% indole-3-carbinol (I3C) chow to slowly induce renin-dependent hypertension over a 6-week period. Systolic blood pressure significantly increased, eventually reaching 200 mmHg by the end of the study period. In contrast, transgenic rats fed a control diet without I3C did not show significant changes in blood pressure (145 mmHg at the end of study). Hypertension was associated with cardiac, aortic, and renal hypertrophy as well as increased collagen deposition in the left ventricle and kidney of the I3C-treated rats. Additionally, rats with hypertension showed reduced savings from prior spatial memory training when tested on the hippocampus-dependent Morris swim task. Motor and sensory functions were found to be unaffected by induction of hypertension. Taken together, these data indicate a profound effect of hypertension not only on the cardiovascular-renal axis but also on brain systems critically important for learning and memory. Future use of this model and approach may empower a more accurate investigation of the influence of aging on the systems responsible for cardiovascular, renal, and neurological health.
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Affiliation(s)
- Mari N. Willeman
- Evelyn F. McKnight Brain InstituteUniversity of ArizonaTucsonArizona
- Neurogenomics DivisionThe Translational Genomics Research Institute (TGen)PhoenixArizona
- Arizona Alzheimer's ConsortiumPhoenixArizona
| | - Monica K. Chawla
- Evelyn F. McKnight Brain InstituteUniversity of ArizonaTucsonArizona
- Arizona Alzheimer's ConsortiumPhoenixArizona
| | - Marc A. Zempare
- Evelyn F. McKnight Brain InstituteUniversity of ArizonaTucsonArizona
- Arizona Alzheimer's ConsortiumPhoenixArizona
| | - Lauren A Biwer
- Department of Basic Medical SciencesUniversity of ArizonaCollege of Medicine – PhoenixPhoenixArizona
| | - Lan T. Hoang
- Evelyn F. McKnight Brain InstituteUniversity of ArizonaTucsonArizona
- Arizona Alzheimer's ConsortiumPhoenixArizona
| | - Ajay R. Uprety
- Evelyn F. McKnight Brain InstituteUniversity of ArizonaTucsonArizona
- Arizona Alzheimer's ConsortiumPhoenixArizona
| | - Megan C. Fitzhugh
- Evelyn F. McKnight Brain InstituteUniversity of ArizonaTucsonArizona
- Arizona Alzheimer's ConsortiumPhoenixArizona
- Department of PsychologyUniversity of ArizonaTucsonArizona
| | - Matthew De Both
- Neurogenomics DivisionThe Translational Genomics Research Institute (TGen)PhoenixArizona
- Arizona Alzheimer's ConsortiumPhoenixArizona
| | - Paul D. Coleman
- Arizona Alzheimer's ConsortiumPhoenixArizona
- Center for Neurodegenerative Disease ResearchBiodesign InstituteArizona State UniversityTempeArizona
| | - Theodore P. Trouard
- Evelyn F. McKnight Brain InstituteUniversity of ArizonaTucsonArizona
- Department of Biomedical Engineering and Medical ImagingUniversity of ArizonaTucsonArizona
| | - Gene E. Alexander
- Evelyn F. McKnight Brain InstituteUniversity of ArizonaTucsonArizona
- Arizona Alzheimer's ConsortiumPhoenixArizona
- Department of PsychologyUniversity of ArizonaTucsonArizona
- Neuroscience and Physiological Sciences Graduate Interdisciplinary ProgramsUniversity of ArizonaTucsonArizona
| | - Kenneth D. Mitchell
- Department of PhysiologyTulane University Health Sciences CenterNew OrleansLos Angeles
| | - Carol A. Barnes
- Evelyn F. McKnight Brain InstituteUniversity of ArizonaTucsonArizona
- Arizona Alzheimer's ConsortiumPhoenixArizona
- Department of PsychologyUniversity of ArizonaTucsonArizona
| | - Taben M. Hale
- Department of Basic Medical SciencesUniversity of ArizonaCollege of Medicine – PhoenixPhoenixArizona
| | - Matthew Huentelman
- Evelyn F. McKnight Brain InstituteUniversity of ArizonaTucsonArizona
- Neurogenomics DivisionThe Translational Genomics Research Institute (TGen)PhoenixArizona
- Arizona Alzheimer's ConsortiumPhoenixArizona
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Horsburgh K, Wardlaw JM, van Agtmael T, Allan SM, Ashford MLJ, Bath PM, Brown R, Berwick J, Cader MZ, Carare RO, Davis JB, Duncombe J, Farr TD, Fowler JH, Goense J, Granata A, Hall CN, Hainsworth AH, Harvey A, Hawkes CA, Joutel A, Kalaria RN, Kehoe PG, Lawrence CB, Lockhart A, Love S, Macleod MR, Macrae IM, Markus HS, McCabe C, McColl BW, Meakin PJ, Miller A, Nedergaard M, O'Sullivan M, Quinn TJ, Rajani R, Saksida LM, Smith C, Smith KJ, Touyz RM, Trueman RC, Wang T, Williams A, Williams SCR, Work LM. Small vessels, dementia and chronic diseases - molecular mechanisms and pathophysiology. Clin Sci (Lond) 2018; 132:851-868. [PMID: 29712883 PMCID: PMC6700732 DOI: 10.1042/cs20171620] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/08/2018] [Accepted: 02/21/2018] [Indexed: 12/14/2022]
Abstract
Cerebral small vessel disease (SVD) is a major contributor to stroke, cognitive impairment and dementia with limited therapeutic interventions. There is a critical need to provide mechanistic insight and improve translation between pre-clinical research and the clinic. A 2-day workshop was held which brought together experts from several disciplines in cerebrovascular disease, dementia and cardiovascular biology, to highlight current advances in these fields, explore synergies and scope for development. These proceedings provide a summary of key talks at the workshop with a particular focus on animal models of cerebral vascular disease and dementia, mechanisms and approaches to improve translation. The outcomes of discussion groups on related themes to identify the gaps in knowledge and requirements to advance knowledge are summarized.
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Affiliation(s)
- Karen Horsburgh
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, U.K.
| | - Joanna M Wardlaw
- Centre for Clinical Brain Sciences, UK Dementia Research Institute, University of Edinburgh, Edinburgh, U.K
| | - Tom van Agtmael
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, U.K
| | - Stuart M Allan
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, U.K
| | | | - Philip M Bath
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, Nottingham, U.K
| | - Rosalind Brown
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, U.K
| | - Jason Berwick
- Department of Psychology, University of Sheffield, Sheffield, U.K
| | - M Zameel Cader
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Roxana O Carare
- Faculty of Medicine, University of Southampton, Southampton, U.K
| | - John B Davis
- Alzheimer's Research UK Oxford Drug Discovery Institute, University of Oxford, Oxford, U.K
| | - Jessica Duncombe
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, U.K
| | - Tracy D Farr
- School of Life Sciences, Nottingham University, Nottingham, U.K
| | - Jill H Fowler
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, U.K
| | - Jozien Goense
- Institute of Neuroscience and Psychology, University of Glasgow, Glasgow, U.K
| | - Alessandra Granata
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, U.K
| | | | - Atticus H Hainsworth
- Molecular and Clinical Sciences Research Institute, St Georges University of London, London, U.K
| | - Adam Harvey
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, U.K
| | - Cheryl A Hawkes
- Faculty of Science, Technology, Engineering & Mathematics, Open University, Milton Keynes, U.K
| | - Anne Joutel
- Genetics and Pathogenesis of Cerebrovascular Diseases, INSERM, Université Paris Diderot-Paris 7, Paris, France
| | - Rajesh N Kalaria
- Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, U.K
| | | | - Catherine B Lawrence
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, U.K
| | | | - Seth Love
- Clinical Neurosciences, University of Bristol, Bristol, U.K
| | - Malcolm R Macleod
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, U.K
| | - I Mhairi Macrae
- Institute of Neuroscience and Psychology, University of Glasgow, Glasgow, U.K
| | - Hugh S Markus
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, U.K
| | - Chris McCabe
- Institute of Neuroscience and Psychology, University of Glasgow, Glasgow, U.K
| | - Barry W McColl
- The Roslin Institute & R(D)SVS, UK Dementia Research Institute, University of Edinburgh, Edinburgh, U.K
| | - Paul J Meakin
- Division of Molecular & Clinical Medicine, School of Medicine, University of Dundee, Dundee, U.K
| | - Alyson Miller
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, U.K
| | - Maiken Nedergaard
- University of Rochester Medical Center, Rochester, NY, USA and University of Copenhagen's Center of Basic and Translational Neuroscience, Copenhagen, Denmark
| | - Michael O'Sullivan
- Mater Centre for Neuroscience and Queensland Brain Institute, Brisbane, Australia
| | - Terry J Quinn
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, U.K
| | - Rikesh Rajani
- Genetics and Pathogenesis of Cerebrovascular Diseases, INSERM, Université Paris Diderot-Paris 7, Paris, France
| | - Lisa M Saksida
- Robarts Research Institute, Western University, London, Ontario, Canada
| | - Colin Smith
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, U.K
| | - Kenneth J Smith
- Department of Neuroinflammation, UCL Institute of Neurology, London, U.K
| | - Rhian M Touyz
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, U.K
| | | | - Tao Wang
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester, U.K
| | - Anna Williams
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, U.K
| | | | - Lorraine M Work
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, U.K
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6
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Taheri S, Yu J, Zhu H, Kindy MS. High-Sodium Diet Has Opposing Effects on Mean Arterial Blood Pressure and Cerebral Perfusion in a Transgenic Mouse Model of Alzheimer's Disease. J Alzheimers Dis 2018; 54:1061-1072. [PMID: 27567835 DOI: 10.3233/jad-160331] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Cerebral ionic homeostasis impairment, especially Ca2+, has been observed in Alzheimer's disease (AD) and also with hypertension. Hypertension and AD both have been implicated in impaired cerebral autoregulation. However, the relationship between the ionic homeostasis impairment in AD and hypertension and cerebral blood flow (CBF) autoregulation is not clear. OBJECTIVE To test the hypothesis that a high-salt diet regimen influences the accumulation of amyloid-β (Aβand CBF) and CBF, exacerbates cognitive decline, and increases the propensity to AD. METHODS Double transgenic mice harboring the amyloid-β protein precursor (APPswe), and presenilin-1 (PSEN1) along with control littermates, 2 months of age at initiation of special diet, were divided into 4 groups: Group A, APP/PS1 and Group B, controls fed a high-sodium (4.00%) chow diet for 3 months; Group C, APP/PS1 and Group D, controls fed a low-sodium (0.08%) regular chow diet for 3 months. Mean arterial blood pressure (MAP) and CBF were measured noninvasively using the tail MAP measurement device and magnetic resonance imaging, respectively. Aβ plaques numbers in the cortex and hippocampus of APP/PS1 were quantified. RESULTS In contrary to controls, APP/PS1 mice fed a high-salt diet did not show markedly elevated mean systolic and diastolic blood pressure (134±4.8 compared with 162±2.8 mmHg, and 114±5.0 compared with 137±20 mmHg, p< 0.0001). However, a high-salt diet increased CBF in both APP/PS1 and controls and did not alter the cerebral tissue integrity. Aβ plaques were significantly reduced in the cortex and hippocampus of mice fed a high-salt diet. CONCLUSION These data suggest that a high-salt diet differently affects MAP and CBF in APP/PS1 mice and controls.
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Affiliation(s)
- Saeid Taheri
- Department of Pharmaceutical Sciences, University of South Florida, Tampa, FL, USA
| | - Jin Yu
- Department of Pharmaceutical Sciences, University of South Florida, Tampa, FL, USA
| | - Hong Zhu
- Department of Pharmaceutical Sciences, University of South Florida, Tampa, FL, USA
| | - Mark S Kindy
- Department of Pharmaceutical Sciences, University of South Florida, Tampa, FL, USA.,James A. Haley VA Medical Center, Tampa, FL, USA
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7
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Fan Y, Lan L, Zheng L, Ji X, Lin J, Zeng J, Huang R, Sun J. Spontaneous white matter lesion in brain of stroke-prone renovascular hypertensive rats: a study from MRI, pathology and behavior. Metab Brain Dis 2015; 30:1479-86. [PMID: 26387009 DOI: 10.1007/s11011-015-9722-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Accepted: 08/21/2015] [Indexed: 10/23/2022]
Abstract
Hypertension is considered one of the most important controllable risk factors for white matter lesion (WML). Our previous work found that stroke-prone renovascular hypertensive rats (RHRSP) displayed a high rate of WML. This study aimed to investigate the WML in RHRSP from MRI, pathology and behavior. RHRSP model was established by two-kidney, two-clipmethod and kept for 20 weeks. WML was decteted by magnetic resonance imaging (MRI) and loyez staining. Cognition was tested by morris water maze (MWM). Vascular changes were observed by HE staining on brain and carotid sections. Ultrastucture of blood brain barrier (BBB) were observed by transmission electron microscope. Immunofluorescence was used to detect albumin leakage and cell proliferation. T(2)-weighted MRI scans of RHRSP displayed diffuse, confluent white-matter hyperintensities. Pathological examination of the same rat showed marked vacuoles, disappearence of myelin and nerve fibers in white matter, supporting the neuroimaging findings. Spatial learning and memory impairment were observed in RHRSP. The small arteries in brain exhibited fibrinoid necrosis, hyalinosis and vascular remodeling. BBB disruption and plasma albumin leakage into vascular wall was observed in RHRSP. Increased cell proliferation in subventricular zone was seen in RHRSP. RHRSP demonstrated spontaneous WML and cognitive impairment. Hypertensive small vessel lesions and BBB disruption might paly causative factors for the onset and development of WML. The characteristic features of WML in RHRSP suggested it a valid animal model for WML.
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Affiliation(s)
- Yuhua Fan
- Department of Neurology, First Affiliated Hospital Sun Yat-Sen University, Guangdong Key Laboratory for Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department National Key Discipline, Guangzhou, 510080, China.
| | - Linfang Lan
- Department of Medicine and Therapeutics, Chinese University of Hongkong, Hongkong, China
| | - Lu Zheng
- Department of Neurology, First Affiliated Hospital Sun Yat-Sen University, Guangdong Key Laboratory for Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department National Key Discipline, Guangzhou, 510080, China
| | - Xiaotan Ji
- Department of Neurology, First Affiliated Hospital Sun Yat-Sen University, Guangdong Key Laboratory for Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department National Key Discipline, Guangzhou, 510080, China
| | - Jing Lin
- Department of Neurology, First Affiliated Hospital Sun Yat-Sen University, Guangdong Key Laboratory for Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department National Key Discipline, Guangzhou, 510080, China
| | - Jinsheng Zeng
- Department of Neurology, First Affiliated Hospital Sun Yat-Sen University, Guangdong Key Laboratory for Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department National Key Discipline, Guangzhou, 510080, China
| | - Ruxun Huang
- Department of Neurology, First Affiliated Hospital Sun Yat-Sen University, Guangdong Key Laboratory for Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department National Key Discipline, Guangzhou, 510080, China
| | - Jian Sun
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.
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8
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Holland PR, Searcy JL, Salvadores N, Scullion G, Chen G, Lawson G, Scott F, Bastin ME, Ihara M, Kalaria R, Wood ER, Smith C, Wardlaw JM, Horsburgh K. Gliovascular disruption and cognitive deficits in a mouse model with features of small vessel disease. J Cereb Blood Flow Metab 2015; 35:1005-14. [PMID: 25669904 PMCID: PMC4640247 DOI: 10.1038/jcbfm.2015.12] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 01/12/2015] [Accepted: 01/13/2015] [Indexed: 01/23/2023]
Abstract
Cerebral small vessel disease (SVD) is a major cause of age-related cognitive impairment and dementia. The pathophysiology of SVD is not well understood and is hampered by a limited range of relevant animal models. Here, we describe gliovascular alterations and cognitive deficits in a mouse model of sustained cerebral hypoperfusion with features of SVD (microinfarcts, hemorrhage, white matter disruption) induced by bilateral common carotid stenosis. Multiple features of SVD were determined on T2-weighted and diffusion-tensor magnetic resonance imaging scans and confirmed by pathologic assessment. These features, which were absent in sham controls, included multiple T2-hyperintense infarcts and T2-hypointense hemosiderin-like regions in subcortical nuclei plus increased cerebral atrophy compared with controls. Fractional anisotropy was also significantly reduced in several white matter structures including the corpus callosum. Investigation of gliovascular changes revealed a marked increase in microvessel diameter, vascular wall disruption, fibrinoid necrosis, hemorrhage, and blood-brain barrier alterations. Widespread reactive gliosis, including displacement of the astrocytic water channel, aquaporin 4, was observed. Hypoperfused mice also demonstrated deficits in spatial working and reference memory tasks. Overall, gliovascular disruption is a prominent feature of this mouse, which could provide a useful model for early-phase testing of potential SVD treatment strategies.
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Affiliation(s)
- Philip R Holland
- Centre for Neuroregeneration, Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK
| | - James L Searcy
- Centre for Neuroregeneration, University of Edinburgh, Edinburgh, UK
| | | | - Gillian Scullion
- Centre for Neuroregeneration, University of Edinburgh, Edinburgh, UK
| | - Guiquan Chen
- Centre for Neuroregeneration, University of Edinburgh, Edinburgh, UK
| | - Greig Lawson
- Centre for Neuroregeneration, University of Edinburgh, Edinburgh, UK
| | - Fiona Scott
- Centre for Neuroregeneration, University of Edinburgh, Edinburgh, UK
| | - Mark E Bastin
- Centre for Cognitive Ageing and Cognitive Epidemiology, Scottish Imaging Network, A Platform for Scientific Collaboration (SINAPSE), Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Masafumi Ihara
- Department of Stroke and Cerebrovascular Diseases, National Cerebral and Cardiovascular Center Hospital, Osaka, Japan
| | - Rajesh Kalaria
- Institute of Neuroscience, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, UK
| | - Emma R Wood
- Centre for Cognitive and Neural Systems and Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK
| | - Colin Smith
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Joanna M Wardlaw
- Centre for Cognitive Ageing and Cognitive Epidemiology, Scottish Imaging Network, A Platform for Scientific Collaboration (SINAPSE), Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Karen Horsburgh
- Centre for Neuroregeneration, Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK
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