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Feinkohl I, Lachmann G, Brockhaus WR, Borchers F, Piper SK, Ottens TH, Nathoe HM, Sauer AM, Dieleman JM, Radtke FM, van Dijk D, Pischon T, Spies C. Association of obesity, diabetes and hypertension with cognitive impairment in older age. Clin Epidemiol 2018; 10:853-862. [PMID: 30100759 PMCID: PMC6064155 DOI: 10.2147/clep.s164793] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Background Age-related cognitive impairment is rising in prevalence but is not yet fully characterized in terms of its epidemiology. Here, we aimed to elucidate the role of obesity, diabetes and hypertension as candidate risk factors. Methods Original baseline data from 3 studies (OCTOPUS, DECS, SuDoCo) were obtained for secondary analysis of cross-sectional associations of diabetes, hypertension, blood pressure, obesity (body mass index [BMI] ≥30 kg/m2) and BMI with presence of cognitive impairment in log-binomial regression analyses. Cognitive impairment was defined as scoring more than 2 standard deviations below controls on at least one of 5–11 cognitive tests. Underweight participants (BMI<18.5 kg/m2) were excluded. Results were pooled across studies in fixed-effects inverse variance models. Results Analyses totaled 1545 participants with a mean age of 61 years (OCTOPUS) to 70 years (SuDoCo). Cognitive impairment was found in 29.0% of participants in DECS, 8.2% in SuDoCo and 45.6% in OCTOPUS. In pooled analyses, after adjustment for age, sex, diabetes and hypertension, obesity was associated with a 1.29-fold increased prevalence of cognitive impairment (risk ratio [RR] 1.29; 95% CI 0.98, 1.72). Each 1 kg/m2 increment in BMI was associated with 3% increased prevalence (RR 1.03; 95% CI 1.00, 1.06). None of the remaining risk factors were associated with impairment. Conclusion Our results show that older people who are obese have higher prevalence of cognitive impairment compared with normal weight and overweight individuals, and independently of co-morbid hypertension or diabetes. Prospective studies are needed to investigate the temporal relationship of the association.
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Affiliation(s)
- Insa Feinkohl
- Molecular Epidemiology Research Group, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin-Buch, Germany,
| | - Gunnar Lachmann
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Wolf-Rüdiger Brockhaus
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Friedrich Borchers
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Sophie K Piper
- Institute of Biometry and Clinical Epidemiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Thomas H Ottens
- Department of Anesthesiology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Hendrik M Nathoe
- Department of Cardiology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Anne-Mette Sauer
- Department of Anesthesiology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Jan M Dieleman
- Department of Anesthesiology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Finn M Radtke
- Department of Anesthesiology, Naestved Hospital, Naestved, Denmark
| | - Diederik van Dijk
- Department of Intensive Care Medicine, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Tobias Pischon
- Molecular Epidemiology Research Group, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin-Buch, Germany, .,Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,MDC/BIH Biobank, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), and Berlin Institute of Health (BIH), Berlin, Germany
| | - Claudia Spies
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
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Rawlings AM, Juraschek SP, Heiss G, Hughes T, Meyer ML, Selvin E, Sharrett AR, Windham BG, Gottesman RF. Association of orthostatic hypotension with incident dementia, stroke, and cognitive decline. Neurology 2018; 91:e759-e768. [PMID: 30045960 DOI: 10.1212/wnl.0000000000006027] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 05/19/2018] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To examine associations of orthostatic hypotension (OH) with dementia and long-term cognitive decline and to update previously published results in the same cohort for stroke with an additional 16 years of follow-up. METHODS We analyzed data from 11,709 participants without a history of coronary heart disease or stroke who attended the baseline examination (1987-1989) of the prospective Atherosclerosis Risk in Communities (ARIC) study. OH was defined as a drop in systolic blood pressure (BP) of at least 20 mm Hg or a drop in diastolic BP of at least 10 mm Hg on standing. Dementia was ascertained via examination, contact with participants or their proxy, or medical record surveillance. Ischemic stroke was ascertained via cohort surveillance of hospitalizations, cohort follow-up, and linkage with registries. Both outcomes were adjudicated. Cognitive function was ascertained via 3 neuropsychological tests administered in 1990 to 1992 and 1996 to 1998 and a full battery of tests in 2011 to 2013. Scores were summarized and reported as SDs. We used adjusted Cox regression and linear mixed models. RESULTS Over ≈25 years, 1,068 participants developed dementia and 842 had an ischemic stroke. Compared to persons without OH at baseline, those with OH had a higher risk of dementia (hazard ratio [HR] 1.54, 95% confidence interval [CI] 1.20-1.97) and ischemic stroke (HR 2.08, 95% CI 1.65-2.62). Persons with OH had greater, although nonsignificant, cognitive decline over 20 years (SD 0.09, 95% CI -0.02 to 0.21). CONCLUSIONS OH assessed in midlife was independently associated with incident dementia and ischemic stroke. Additional studies are needed to elucidate potential mechanisms for these associations and possible applications for prevention.
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Affiliation(s)
- Andreea M Rawlings
- From the Department of Epidemiology (A.M.R., S.P.J., E.S., A.R.S., R.F.G.), Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; School of Biological and Population Health Sciences (A.M.R.), Oregon State University, Corvallis; Departments of Medicine (S.P.J.) and Neurology (R.F.G.), Johns Hopkins School of Medicine, Baltimore, MD; Harvard Medical School and Beth Israel Deaconess Medical Center (S.P.J.), Boston MA; Department of Epidemiology (G.H., M.L.M.), University of North Carolina at Chapel Hill; Department of Internal Medicine (T.M.H.), Division of Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC; and Division of Geriatrics (B.G.W.), Department of Medicine, University of Mississippi Medical Center, Jackson.
| | - Stephen P Juraschek
- From the Department of Epidemiology (A.M.R., S.P.J., E.S., A.R.S., R.F.G.), Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; School of Biological and Population Health Sciences (A.M.R.), Oregon State University, Corvallis; Departments of Medicine (S.P.J.) and Neurology (R.F.G.), Johns Hopkins School of Medicine, Baltimore, MD; Harvard Medical School and Beth Israel Deaconess Medical Center (S.P.J.), Boston MA; Department of Epidemiology (G.H., M.L.M.), University of North Carolina at Chapel Hill; Department of Internal Medicine (T.M.H.), Division of Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC; and Division of Geriatrics (B.G.W.), Department of Medicine, University of Mississippi Medical Center, Jackson
| | - Gerardo Heiss
- From the Department of Epidemiology (A.M.R., S.P.J., E.S., A.R.S., R.F.G.), Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; School of Biological and Population Health Sciences (A.M.R.), Oregon State University, Corvallis; Departments of Medicine (S.P.J.) and Neurology (R.F.G.), Johns Hopkins School of Medicine, Baltimore, MD; Harvard Medical School and Beth Israel Deaconess Medical Center (S.P.J.), Boston MA; Department of Epidemiology (G.H., M.L.M.), University of North Carolina at Chapel Hill; Department of Internal Medicine (T.M.H.), Division of Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC; and Division of Geriatrics (B.G.W.), Department of Medicine, University of Mississippi Medical Center, Jackson
| | - Timothy Hughes
- From the Department of Epidemiology (A.M.R., S.P.J., E.S., A.R.S., R.F.G.), Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; School of Biological and Population Health Sciences (A.M.R.), Oregon State University, Corvallis; Departments of Medicine (S.P.J.) and Neurology (R.F.G.), Johns Hopkins School of Medicine, Baltimore, MD; Harvard Medical School and Beth Israel Deaconess Medical Center (S.P.J.), Boston MA; Department of Epidemiology (G.H., M.L.M.), University of North Carolina at Chapel Hill; Department of Internal Medicine (T.M.H.), Division of Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC; and Division of Geriatrics (B.G.W.), Department of Medicine, University of Mississippi Medical Center, Jackson
| | - Michelle L Meyer
- From the Department of Epidemiology (A.M.R., S.P.J., E.S., A.R.S., R.F.G.), Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; School of Biological and Population Health Sciences (A.M.R.), Oregon State University, Corvallis; Departments of Medicine (S.P.J.) and Neurology (R.F.G.), Johns Hopkins School of Medicine, Baltimore, MD; Harvard Medical School and Beth Israel Deaconess Medical Center (S.P.J.), Boston MA; Department of Epidemiology (G.H., M.L.M.), University of North Carolina at Chapel Hill; Department of Internal Medicine (T.M.H.), Division of Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC; and Division of Geriatrics (B.G.W.), Department of Medicine, University of Mississippi Medical Center, Jackson
| | - Elizabeth Selvin
- From the Department of Epidemiology (A.M.R., S.P.J., E.S., A.R.S., R.F.G.), Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; School of Biological and Population Health Sciences (A.M.R.), Oregon State University, Corvallis; Departments of Medicine (S.P.J.) and Neurology (R.F.G.), Johns Hopkins School of Medicine, Baltimore, MD; Harvard Medical School and Beth Israel Deaconess Medical Center (S.P.J.), Boston MA; Department of Epidemiology (G.H., M.L.M.), University of North Carolina at Chapel Hill; Department of Internal Medicine (T.M.H.), Division of Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC; and Division of Geriatrics (B.G.W.), Department of Medicine, University of Mississippi Medical Center, Jackson
| | - A Richey Sharrett
- From the Department of Epidemiology (A.M.R., S.P.J., E.S., A.R.S., R.F.G.), Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; School of Biological and Population Health Sciences (A.M.R.), Oregon State University, Corvallis; Departments of Medicine (S.P.J.) and Neurology (R.F.G.), Johns Hopkins School of Medicine, Baltimore, MD; Harvard Medical School and Beth Israel Deaconess Medical Center (S.P.J.), Boston MA; Department of Epidemiology (G.H., M.L.M.), University of North Carolina at Chapel Hill; Department of Internal Medicine (T.M.H.), Division of Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC; and Division of Geriatrics (B.G.W.), Department of Medicine, University of Mississippi Medical Center, Jackson
| | - B Gwen Windham
- From the Department of Epidemiology (A.M.R., S.P.J., E.S., A.R.S., R.F.G.), Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; School of Biological and Population Health Sciences (A.M.R.), Oregon State University, Corvallis; Departments of Medicine (S.P.J.) and Neurology (R.F.G.), Johns Hopkins School of Medicine, Baltimore, MD; Harvard Medical School and Beth Israel Deaconess Medical Center (S.P.J.), Boston MA; Department of Epidemiology (G.H., M.L.M.), University of North Carolina at Chapel Hill; Department of Internal Medicine (T.M.H.), Division of Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC; and Division of Geriatrics (B.G.W.), Department of Medicine, University of Mississippi Medical Center, Jackson
| | - Rebecca F Gottesman
- From the Department of Epidemiology (A.M.R., S.P.J., E.S., A.R.S., R.F.G.), Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; School of Biological and Population Health Sciences (A.M.R.), Oregon State University, Corvallis; Departments of Medicine (S.P.J.) and Neurology (R.F.G.), Johns Hopkins School of Medicine, Baltimore, MD; Harvard Medical School and Beth Israel Deaconess Medical Center (S.P.J.), Boston MA; Department of Epidemiology (G.H., M.L.M.), University of North Carolina at Chapel Hill; Department of Internal Medicine (T.M.H.), Division of Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC; and Division of Geriatrics (B.G.W.), Department of Medicine, University of Mississippi Medical Center, Jackson
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Vemuri P. "Exceptional brain aging" without Alzheimer's disease: triggers, accelerators, and the net sum game. ALZHEIMERS RESEARCH & THERAPY 2018; 10:53. [PMID: 29859131 PMCID: PMC5984828 DOI: 10.1186/s13195-018-0373-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Background As human longevity increases and Alzheimer’s disease (AD) increasingly becomes a significant societal burden, finding pathways or protective factors that facilitate exceptional brain aging without AD pathophysiologies (ADP) will be critical. The goal of this viewpoint is two-fold: 1) to present evidence for “exceptional brain aging” without ADP; and 2) to bring together ideas and observations from the literature and present them as testable hypotheses for biomarker studies to discover protective factors for “exceptional brain aging” without ADP and AD dementia. Discovering pathways to exceptional aging There are three testable hypotheses. First, discovering and quantifying links between risk factor(s) and early ADP changes in midlife using longitudinal biomarker studies will be fundamental to understanding why the majority of individuals deviate from normal aging to the AD pathway. Second, a risk factor may have quantifiably greater impact as a trigger and/or accelerator on a specific component of the biomarker cascade (amyloid, tau, neurodegeneration). Finally, and most importantly, while each risk factor may have a different mechanism of action on AD biomarkers, “exceptional aging” and protection against AD dementia will come from “net sum” protection against all components of the biomarker cascade. The knowledge of the mechanism of action of risk factor(s) from hypotheses 1 and 2 will aid in better characterization of their effect on outcomes, identification of subpopulations that would benefit, and the timing at which the risk factor(s) would have the maximal impact. Additionally, hypothesis 3 highlights the importance of multifactorial or multi-domain approaches to “exceptional aging” as well as prevention of AD dementia. Conclusion While important strides have been made in identifying risk factors for AD dementia incidence, further efforts are needed to translate these into effective preventive strategies. Using biomarker studies for understanding the mechanism of action, effect size estimation, selection of appropriate end-points, and better subject recruitment based on subpopulation effects are fundamental for better design and success of prevention trials.
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Affiliation(s)
- Prashanthi Vemuri
- Department of Radiology, Mayo Clinic and Foundation, 200 First Street SW, Rochester, MN, 55905, USA.
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254
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Hussain S, Singh A, Rahman SO, Habib A, Najmi AK. Calcium channel blocker use reduces incident dementia risk in elderly hypertensive patients: A meta-analysis of prospective studies. Neurosci Lett 2018; 671:120-127. [DOI: 10.1016/j.neulet.2018.02.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 02/11/2018] [Accepted: 02/13/2018] [Indexed: 01/30/2023]
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255
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Physiological changes in neurodegeneration - mechanistic insights and clinical utility. Nat Rev Neurol 2018; 14:259-271. [PMID: 29569624 DOI: 10.1038/nrneurol.2018.23] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The effects of neurodegenerative syndromes extend beyond cognitive function to involve key physiological processes, including eating and metabolism, autonomic nervous system function, sleep, and motor function. Changes in these physiological processes are present in several conditions, including frontotemporal dementia, amyotrophic lateral sclerosis, Alzheimer disease and the parkinsonian plus conditions. Key neural structures that mediate physiological changes across these conditions include neuroendocrine and hypothalamic pathways, reward pathways, motor systems and the autonomic nervous system. In this Review, we highlight the key changes in physiological processing in neurodegenerative syndromes and the similarities in these changes between different progressive neurodegenerative brain conditions. The changes and similarities between disorders might provide novel insights into the human neural correlates of physiological functioning. Given the evidence that physiological changes can arise early in the neurodegenerative process, these changes could provide biomarkers to aid in the early diagnosis of neurodegenerative diseases and in treatment trials.
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256
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Sun MK. Potential Therapeutics for Vascular Cognitive Impairment and Dementia. Curr Neuropharmacol 2018; 16:1036-1044. [PMID: 29046153 PMCID: PMC6120112 DOI: 10.2174/1570159x15666171016164734] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 05/24/2017] [Accepted: 05/26/2017] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND As the human lifespan increases, the number of people affected by agerelated dementia is growing at an epidemic pace. Vascular pathology dramatically affects cognitive profiles, resulting in dementia and cognitive impairment. While vascular dementia itself constitutes a medical challenge, hypo-perfusion/vascular risk factors enhance amyloid toxicity and other memory- damaging factors and hasten Alzheimer's disease (AD) and other memory disorders' progression, as well as negatively affect treatment outcome. METHODS Research and online content related to vascular cognitive impairment and dementia is reviewed, specifically focusing on the potential treatment of the disorder. RESULTS Few therapeutic options are currently available to improve the prognosis of patients with vascular dementia and cognitive impairment, mixed AD dementia with vascular pathology, or other memory disorders. Emerging evidence, however, indicates that, like AD and other memory disorders, synaptic impairment underlies much of the memory impairment in the cognitive decline of vascular cognitive impairment and vascular dementia. CONCLUSION Effective rescues of the memory functions might be achieved through synaptic and memory therapeutics, targeting distinct molecular signaling pathways that support the formation of new synapses and maintaining their connections. Potential therapeutic agents include: 1) memory therapeutic agents that rescue synaptic and memory functions after the brain insults; 2) antipathologic therapeutics and an effective management of vascular risk factors; and 3) preventative therapeutic agents that achieve memory therapy through functional enhancement. These therapeutic agents are also likely to benefit patients with AD and/or other types of memory disorders.
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Affiliation(s)
- Miao-Kun Sun
- Blanchette Rockefeller Neurosciences Institute, 8 Medical Center Drive, Morgantown, West Virginia26505, USA
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257
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Lin CH, Cheng HM, Chuang SY, Chen CH. Vascular Aging and Cognitive Dysfunction: Silent Midlife Crisis in the Brain. Pulse (Basel) 2017; 5:127-132. [PMID: 29761088 DOI: 10.1159/000481734] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 09/22/2017] [Indexed: 11/19/2022] Open
Abstract
Background Vascular aging may cause cerebral microvascular damage and cognitive dysfunction. There is incremental evidence that consistently implicates arterial stiffness being involved in the manifestation of cognitive impairment in the elderly. However, few investigations have examined the relationship between arterial stiffness and cognitive impairment in midlife. Summary Past studies inconsistently showed improved cognitive outcomes after antihypertensive therapy in elderly populations. Nevertheless, recent findings revealed that blood-pressure-lowering treatment in young adults might eliminate or halt the progression of the detrimental effects related to arterial stiffness, indicating that younger adults may have more favorable outcomes in cognition than their older counterparts if early intervention is conducted at the subclinical stage. Stiffening of the aorta may lead to an excessive flow pulsatility in the brain that may cause microvascular structural brain damage and worse cognitive performance. Recent investigations have suggested that arterial stiffness is likely to trigger initial silent brain damage, possibly preceding midlife, while the manifestation of cognitive decline and deterioration can be foreseen in the subsequent life span. Key Message Despite the recent novel findings, definite conclusions on causality between vascular aging and cognitive dysfunction cannot be drawn at present. Further well-powered longitudinal studies with superior neuroimaging indicator, vascular mechanical biomarkers, and sensitive cognitive assessment tools that examine a broad range of age populations may help extend our understanding of the association between vascular aging and cognitive dysfunction throughout the life span.
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Affiliation(s)
- Chen-Hua Lin
- Institute of Public Health, National Yang-Ming University, Taipei, ROC
| | - Hao-Min Cheng
- Institute of Public Health, National Yang-Ming University, Taipei, ROC.,Faculty of Medicine, National Yang-Ming University, Taipei, ROC.,Center for Evidence-Based Medicine, Taipei Veterans General Hospital, Taipei, ROC.,Department of Medical Education, Taipei Veterans General Hospital, Taipei, ROC.,Department of Internal Medicine, Taipei Veterans General Hospital, Taipei, ROC
| | | | - Chen-Huan Chen
- Institute of Public Health, National Yang-Ming University, Taipei, ROC.,Faculty of Medicine, National Yang-Ming University, Taipei, ROC.,Department of Medical Education, Taipei Veterans General Hospital, Taipei, ROC.,Department of Internal Medicine, Taipei Veterans General Hospital, Taipei, ROC
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258
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Guo CP, Wei Z, Huang F, Qin M, Li X, Wang YM, Wang Q, Wang JZ, Liu R, Zhang B, Li HL, Wang XC. High salt induced hypertension leads to cognitive defect. Oncotarget 2017; 8:95780-95790. [PMID: 29221166 PMCID: PMC5707060 DOI: 10.18632/oncotarget.21326] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 08/17/2017] [Indexed: 01/01/2023] Open
Abstract
Although increasing evidences suggest a relationship between hypertension and brain function for years, it is still unclear whether hypertension constitutes a risk factor for cognitive decline and its underlying mechanism. In the present study, an experimental animal model of hypertension simply by feeding rats with high salt diet was employed. We found that long-term high salt intake caused a marked increase of systolic blood pressure linked to a declined regional cerebral blood flow. Fear conditioning and morris water maze behavioral test revealed that high salt diet induced hippocampal dependent spatial reference memory deficits, while a decreased synaptogenesis without neuronal loss in hippocampus was observed in high salt treated rats. Furthermore, we found that high salt induced a decrease of intracellular calcium, which inactivated CaMK II and resulted in dephosphorylation of CREB at Ser133. These findings suggest a novel etiopathogenic mechanism of cognitive deficit induced by hypertension, which is initiated by high salt diet.
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Affiliation(s)
- Cui-Ping Guo
- Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhen Wei
- Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Fang Huang
- Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Min Qin
- Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xing Li
- Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yu-Man Wang
- Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Qun Wang
- Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Jian-Zhi Wang
- Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.,Division of Neurodegenerative Disorders, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, JS 226001, China
| | - Rong Liu
- Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Bin Zhang
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Hong-Lian Li
- Department of Histology and Embryology, School of Basic Medicine, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xiao-Chuan Wang
- Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.,Division of Neurodegenerative Disorders, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, JS 226001, China
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259
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Orthostatic hypotension associated with executive dysfunction in mild cognitive impairment. J Neurol Sci 2017; 382:79-83. [PMID: 29111025 DOI: 10.1016/j.jns.2017.09.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 08/29/2017] [Accepted: 09/19/2017] [Indexed: 01/25/2023]
Abstract
INTRODUCTION Midlife hypertension is associated with dementia in longitudinal studies while chronic hypotension in the elderly is associated with dementia onset. Orthostatic hypotension could influence cognitive performance in the elderly. The objective of this study was to assess the relationship between orthostatic hypotension and cognitive functions. METHODS Consecutive participants with complete neuropsychological evaluation from a Memory Clinic were included. Orthostatic hypotension (OH) was defined by a fall≥20/10mmHg systolic/diastolic pressure. Participants were classified into one of 3 groups: 1) subjective cognitive impairment (SCI), 2) mild cognitive impairment (MCI), and 3) dementia. Neuropsychological tests were analyzed for patients with and without OH. RESULTS One hundred and twenty participants were included, of which 16 (13%) were classified as SCI, 42 (35%) as MCI, and 63 (52%) with dementia. Prevalence of OH was 0% for the SCI group, 26% (n=11) for the MCI group, and 38% (n=24) for the dementia group. Age, sex, education, and brief cognitive test scores (MMSE & MoCA) were not different between groups with or without OH. In the MCI group, OH was associated with lower cognitive performance in several executive functions tests: visual working memory (p<0.001), processing speed (p=0.006), Stroop flexibility (p=0.030) and Trail-Making Test part B (p=0.024). There was no difference in episodic memory performance. OH was associated with a diagnosis of hypertension and the use of antihypertensive medication. No differences were observed in vascular brain injury between groups with and without OH. CONCLUSIONS This study found that orthostatic hypotension prevalence is correlated to severity of cognitive deficits in a Memory Clinic. In MCI, OH is associated with lower performance in executive functions. OH could represent an under-recognized correlate of cognitive performance.
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Rohde D, Hickey A, Williams D, Bennett K. Cognitive impairment and cardiovascular medication use: Results from wave 1 of The Irish Longitudinal Study on Ageing. Cardiovasc Ther 2017; 35. [PMID: 28836733 DOI: 10.1111/1755-5922.12300] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 07/24/2017] [Accepted: 08/20/2017] [Indexed: 12/28/2022] Open
Affiliation(s)
- Daniela Rohde
- Division of Population Health Sciences; Royal College of Surgeons in Ireland; Dublin Ireland
| | - Anne Hickey
- Division of Population Health Sciences; Royal College of Surgeons in Ireland; Dublin Ireland
| | - David Williams
- Geriatric and Stroke Medicine; Royal College of Surgeons in Ireland and Beaumont Hospital; Dublin Ireland
| | - Kathleen Bennett
- Division of Population Health Sciences; Royal College of Surgeons in Ireland; Dublin Ireland
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Gabin JM, Tambs K, Saltvedt I, Sund E, Holmen J. Association between blood pressure and Alzheimer disease measured up to 27 years prior to diagnosis: the HUNT Study. ALZHEIMERS RESEARCH & THERAPY 2017; 9:37. [PMID: 28569205 PMCID: PMC5452294 DOI: 10.1186/s13195-017-0262-x] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 05/02/2017] [Indexed: 01/27/2023]
Abstract
Background A lot of attention has been paid to the relationship of blood pressure and dementia because epidemiological research has reported conflicting evidence. Observational data has shown that midlife hypertension is a risk factor for cognitive decline and dementia later in life, whereas there is evidence that low blood pressure is predictive in later life. The aim of the present study was to examine the association between dementia and blood pressure measured up to 27 years (mean 17.6 years) prior to ascertainment. Methods In Nord-Trøndelag County, Norway, incident dementia data were collected during 1995–2011, and the diagnoses were validated by a panel of experts in the field. By using the subjects’ personal identification numbers, the dementia data were linked to data from the Nord-Trøndelag Health Study (the HUNT Study), a large, population-based health study performed in 1984–1986 (HUNT 1) and 1995–1997 (HUNT 2). A total of 24,638 participants of the HUNT Study were included in the present study, 579 of whom were diagnosed with Alzheimer disease, mixed Alzheimer/vascular dementia, or vascular dementia. Multiple logistic regression analyses were conducted to analyze the association between dementia and blood pressure data from HUNT 1 and HUNT 2. Results Over the age of 60 years, consistent inverse associations were observed between systolic blood pressure and all-cause dementia, mixed Alzheimer/vascular dementia, and Alzheimer disease, but not with vascular dementia, when adjusting for age, sex, education, and other relevant covariates. This was observed for systolic blood pressure in both HUNT 1 and HUNT 2, regardless of antihypertensive medication use. There was an adverse association between systolic blood pressure, pulse pressure, and Alzheimer disease in individuals treated with antihypertensive medication under the age of 60 years. Conclusions Our data are in line with those in previous studies demonstrating an inverse association between dementia and systolic blood pressure in individuals over the age of 60 years. We cannot exclude a survival effect, however. Among middle-aged subjects (<60 years), elevated systolic blood pressure and pulse pressure were associated with eventual Alzheimer disease in individuals who reported using antihypertensive medication. Electronic supplementary material The online version of this article (doi:10.1186/s13195-017-0262-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jessica Mira Gabin
- HUNT Research Centre, Faculty of Medicine and Health Sciences , Department of Public Health and Nursing, Norwegian University of Science and Technology (NTNU), Forskningsveien 2, 7600, Levanger, Norway.
| | - Kristian Tambs
- Division of Mental Health, Norwegian Institute of Public Health, Post Office Box 4404, Nydalen, 0403, Oslo, Norway
| | - Ingvild Saltvedt
- Faculty of Medicine and Health Sciences, Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology (NTNU), Post Office Box 8905, 7491, Trondheim, Norway.,Department of Geriatrics, St. Olav's Hospital, Post Office Box 3250, 7006, Trondheim, Norway
| | - Erik Sund
- HUNT Research Centre, Faculty of Medicine and Health Sciences , Department of Public Health and Nursing, Norwegian University of Science and Technology (NTNU), Forskningsveien 2, 7600, Levanger, Norway
| | - Jostein Holmen
- HUNT Research Centre, Faculty of Medicine and Health Sciences , Department of Public Health and Nursing, Norwegian University of Science and Technology (NTNU), Forskningsveien 2, 7600, Levanger, Norway
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