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Boa Sorte Silva NC, Barha CK, Erickson KI, Kramer AF, Liu-Ambrose T. Physical exercise, cognition, and brain health in aging. Trends Neurosci 2024; 47:402-417. [PMID: 38811309 DOI: 10.1016/j.tins.2024.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 03/20/2024] [Accepted: 04/17/2024] [Indexed: 05/31/2024]
Abstract
Exercise training is an important strategy to counteract cognitive and brain health decline during aging. Evidence from systematic reviews and meta-analyses supports the notion of beneficial effects of exercise in cognitively unimpaired and impaired older individuals. However, the effects are often modest, and likely influenced by moderators such as exercise training parameters, sample characteristics, outcome assessments, and control conditions. Here, we discuss evidence on the impact of exercise on cognitive and brain health outcomes in healthy aging and in individuals with or at risk for cognitive impairment and neurodegeneration. We also review neuroplastic adaptations in response to exercise and their potential neurobiological mechanisms. We conclude by highlighting goals for future studies, including addressing unexplored neurobiological mechanisms and the inclusion of under-represented populations.
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Affiliation(s)
- Nárlon C Boa Sorte Silva
- Djavad Mowafaghian Centre for Brain Health, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Centre for Aging SMART at Vancouver Coastal Health, Vancouver Coastal Health Research Institute, Vancouver, British Columbia, Canada
| | - Cindy K Barha
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada; Department of Cell Biology and Anatomy, Hotchkiss Brain Institute, Calgary, Alberta, Canada
| | - Kirk I Erickson
- Department of Psychology, University of Pittsburgh, Pittsburgh, PA, USA; AdventHealth Research Institute, Neuroscience, Orlando, FL, USA
| | - Arthur F Kramer
- Center for Cognitive and Brain Health, Northeastern University, Boston, MA, USA; Beckman Institute, University of Illinois Urbana-Champaign, Champaign, IL, USA
| | - Teresa Liu-Ambrose
- Djavad Mowafaghian Centre for Brain Health, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Centre for Aging SMART at Vancouver Coastal Health, Vancouver Coastal Health Research Institute, Vancouver, British Columbia, Canada.
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2
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Raffin J. Does Physical Exercise Modify the Pathophysiology of Alzheimer's Disease in Older Persons? JAR LIFE 2024; 13:77-81. [PMID: 38803456 PMCID: PMC11129780 DOI: 10.14283/jarlife.2024.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Accepted: 05/07/2024] [Indexed: 05/29/2024]
Abstract
Physical exercise is well known for its benefits on brain health. However, the mechanisms through which these benefits occur remain discussed, especially in the context of cognitive conditions such as Alzheimer's disease. The present short review summarizes the findings of interventional studies that examined the effects of exercise training on the specific and non-specific biomarkers of Alzheimer's disease. Controlled exercise intervention studies published in the English language were selected if they assessed the effects of a physical exercise intervention of at least 2 weeks in middle-aged or older adults on one of the following biomarkers measured either in the brain, the cerebrospinal fluid or the blood: beta-amyloid, tau, neurofilament light chain, and glial fibrillary acidic protein. Overall, there was no strong evidence of significant effects of exercise interventions on any of the selected biomarkers. However, in specific populations, such as women with obesity, pre-diabetes, or depression, favorable changes in blood beta-amyloid concentrations were reported. Further benefits on cerebrospinal fluid beta-amyloid were also demonstrated in APOE-ε4 allele carriers with Alzheimer's disease. In conclusion, the current evidence suggests that physical exercise does not modulate the pathophysiology of Alzheimer's disease in the overall population of middle-aged and older adults. Nonetheless, some specific populations, such as women with metabolic disorders and Alzheimer's disease patients with APOE-ε4 genotype, seem to be favorably affected. Further studies, including long follow-ups, large sample sizes, and concomitantly assessing the effects of other factors such as sedentary behavior and diet, are required to bring further evidence to the field.
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Affiliation(s)
- J. Raffin
- Institut Hospitalo-Universitaire (IHU) HealthAge, Toulouse, France
- Institut du Vieillissement, Gérontopôle de Toulouse, Centre Hospitalo-Universitaire de Toulouse, 37 allées Jules Guesde, 31000 Toulouse, France
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3
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Kress GT, Popa ES, Merrill DA, Bramen JE, Siddarth P. The impact of physical exercise on hippocampal atrophy in mild cognitive impairment and Alzheimer's disease: a meta-analysis. Neuroreport 2024; 35:529-535. [PMID: 38606637 DOI: 10.1097/wnr.0000000000002037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
Physical activity (PA) is a promising therapeutic for Alzheimer's disease (AD). Only a handful of meta-analyses have studied the impact of PA interventions on regional brain volumes, and none to date has solely included studies on effect of PA on regional brain volumes in individuals with cognitive impairment (CI). In this meta-analysis, we examined whether there is support for the hypothesis that PA interventions positively impact hippocampal volume (HV) in individuals with CI. We also assessed whether the level of CI [mild CI (MCI) vs. AD] impacted this relationship. We identified six controlled trials that met inclusion criteria. These included 236 participants with AD, MCI, or preclinical AD. Data were extracted and analyzed following Cochrane guidelines. We used a random-effects model to estimate the mean change in HV pre- and post-exercise intervention. Forest plots, Hedges' g funnel plots, and Egger's test were used to assess unbiasedness and visualize intervention effects, and Tau 2 , Cochran's Q, and I 2 were calculated to assess heterogeneity. The primary analysis revealed a significant positive effect of PA on total HV. However, sub-group analyses indicated a significant preservation of HV only in individuals with MCI, but not in those with AD. Egger's test indicated no evidence of publication bias. Subgroup analyses also revealed significant heterogeneity only within the MCI cohort for the total and left HV. PA demonstrated a moderate, significant effect in preserving HV among individuals with MCI, but not AD, highlighting a therapeutic benefit, particularly in earlier disease stages.
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Affiliation(s)
- Gavin T Kress
- Pacific Brain Health Center and Pacific Neuroscience Institute, Santa Monica, California
- Icahn School of Medicine at Mount Sinai, New York, New York
| | - Emily S Popa
- Pacific Brain Health Center and Pacific Neuroscience Institute, Santa Monica, California
| | - David A Merrill
- Pacific Brain Health Center and Pacific Neuroscience Institute, Santa Monica, California
- David Geffen School of Medicine at University of California Los Angeles
| | - Jennifer E Bramen
- Pacific Brain Health Center and Pacific Neuroscience Institute, Santa Monica, California
- University of California Los Angeles, Los Angeles, California, USA
| | - Prabha Siddarth
- Pacific Brain Health Center and Pacific Neuroscience Institute, Santa Monica, California
- David Geffen School of Medicine at University of California Los Angeles
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Pucci IM, Aguiar AF, Pucci RM, Casonatto J, Borghi SM. Systematic review and meta-analysis of randomized controlled trials on the effects of exercise interventions on amyloid beta levels in humans. Exp Brain Res 2024; 242:1011-1024. [PMID: 38551691 DOI: 10.1007/s00221-024-06821-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 03/13/2024] [Indexed: 06/05/2024]
Abstract
Alzheimer's disease (AD) represents the most common type of dementia. A crucial mechanism attributed to its development is amyloid beta (Aβ) dynamics dysregulation. The extent to which exercise can modulate this phenomenon is uncertain. The aim of this study was to summarize the existing literature evaluating this issue. A comprehensive systematic search was performed in Pubmed, Scopus, Embase, Web of Science, and SciELO databases and completed in August 2023, aiming to identify randomized controlled trials investigating the effect of exercise upon Aβ-related pathology. The keywords "exercise" and "amyloid beta", as well as all their equivalents and similar terms, were used. For the analysis, the negative or positive dementia status of the subjects was initially considered and then the soluble amyloid precursor protein (sAPP) components and Aβ fragments separately. A meta-analysis was performed and involved eight studies (moderate-to-high quality) and 644 assessments, which were 297 for control and 347 for exercise. No overall effect favoring exercise interventions was observed for both negative (SMD95%=0,286 [-0,131; 0,704]; p = 0,179) or positive AD dementia status (SMD95%=0,110 [-0,155; 0,375]; p = 0,416). The absence of an overall effect favoring exercise interventions was also found for Aβ peptides (SMD95%=0,226 [-0,028; 0,480]; p = 0,081) and for sAPP components (SMD95%=-0,038 50 [-0,472; 0,396]; p = 0,863) levels. Our findings suggest that exercise interventions do not improve Aβ-related pathology in both healthy individuals and individuals with dementia (SMD95%=0,157 [-0,059; 0,373]; p = 0,155), indicating that the beneficial effects of exercise for AD reported in previous studies are related to other mechanistic effects rather than direct amyloid effects (PROSPERO registration number: CRD42023426912).
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Affiliation(s)
- Isabela Mayer Pucci
- Center for Research in Health Sciences, Universidade Norte do Paraná (Unopar), Paraná, Londrina, 86041-140, Brazil
| | - Andreo F Aguiar
- Center for Research in Health Sciences, Universidade Norte do Paraná (Unopar), Paraná, Londrina, 86041-140, Brazil
| | - Rodrigo M Pucci
- Universidade Federal do Mato Grosso do Sul (UFMS), Campo Grande, Mato Grosso do Sul, Cuiabá, 79070-900, Brazil
| | - Juliano Casonatto
- Center for Research in Health Sciences, Universidade Norte do Paraná (Unopar), Paraná, Londrina, 86041-140, Brazil
| | - Sergio Marques Borghi
- Center for Research in Health Sciences, Universidade Norte do Paraná (Unopar), Paraná, Londrina, 86041-140, Brazil.
- Department of Pathology, Biological Sciences Center, Universidade Estadual de Londrina (UEL), Paraná State, Londrina, 86057-970, Brazil.
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Rodriguez-Ayllon M, Solis-Urra P, Arroyo-Ávila C, Álvarez-Ortega M, Molina-García P, Molina-Hidalgo C, Gómez-Río M, Brown B, Erickson KI, Esteban-Cornejo I. Physical activity and amyloid beta in middle-aged and older adults: A systematic review and meta-analysis. JOURNAL OF SPORT AND HEALTH SCIENCE 2024; 13:133-144. [PMID: 37558161 PMCID: PMC10980893 DOI: 10.1016/j.jshs.2023.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 02/11/2023] [Accepted: 06/30/2023] [Indexed: 08/11/2023]
Abstract
BACKGROUND One of the pathological hallmarks distinguishing Alzheimer's disease from other dementias is the accumulation of amyloid beta (Aβ). Higher physical activity is associated with decreased dementia risk, and one potential path could be through Aβ levels modulation. We aimed to explore the relationship between physical activity and Aβ in middle-aged and older adults. METHODS A systematic search of PubMed, Web of Science, PsycINFO, Cochrane Central Register of Controlled Trials, and SPORTDiscus was performed from inception to April 28, 2022. Studies were eligible if they included physical activity and Aβ data in adults aged 45 years or older. Multi-level meta-analyses of intervention and observational studies were performed to examine the role of physical activity in modulating Aβ levels. RESULTS In total, 37 articles were included (8 randomized controlled trials, 3 non-randomized controlled trials, 4 prospective longitudinal studies, and 22 cross-sectional studies). The overall effect size of physical activity interventions on changes in blood Aβ was medium (pooled standardized mean difference = -0.69, 95% confidence interval (95%CI): -1.41 to 0.03; I2 = 74.6%). However, these results were not statistically significant, and there were not enough studies to explore the effects of physical activity on cerebrospinal fluid (CSF) and brain Aβ. Data from observational studies were examined based on measurements of Aβ in the brain using positron emission tomography scans, CSF, and blood. Higher physical activity was positively associated with Aβ only in the CSF (Estimate r = 0.12; 95%CI: 0.05-0.18; I2 = 38.00%). CONCLUSION Physical activity might moderately reduce blood Aβ in middle-aged and older adults. However, results were only near statistical significance and might be interpreted with caution given the methodological limitations observed in some of the included studies. In observational studies, higher levels of physical activity were positively associated with Aβ only in CSF. Therefore, further research is needed to understand the modulating role of physical activity in the brain, CSF, and blood Aβ, as well as its implication for cognitive health.
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Affiliation(s)
- María Rodriguez-Ayllon
- Department of Epidemiology, Erasmus University Medical Center Rotterdam, Rotterdam, GD 3015, the Netherlands
| | - Patricio Solis-Urra
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute (iMUDS), University of Granada, Granada 18071, Spain; Faculty of Education and Social Sciences, Universidad Andres Bello, Viña del Mar 2531015, Chile; Department of Nuclear Medicine, Virgen de las Nieves University Hospital, Institute of Biosanitary Research of Granada (IBS), Granada 18014, Spain
| | - Cristina Arroyo-Ávila
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute (iMUDS), University of Granada, Granada 18071, Spain
| | - Miriam Álvarez-Ortega
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute (iMUDS), University of Granada, Granada 18071, Spain
| | - Pablo Molina-García
- Physical Medicine and Rehabilitation Service, Virgen de las Nieves University Hospital, Institute of Biosanitary Research of Granada (IBS), Granada 18014, Spain
| | | | - Manuel Gómez-Río
- Department of Nuclear Medicine, Virgen de las Nieves University Hospital, Institute of Biosanitary Research of Granada (IBS), Granada 18014, Spain
| | - Belinda Brown
- Centre for Healthy Ageing, Health Futures Institute, Murdoch University, Murdoch, WA 6150, Australia; School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA 6027, Australia
| | - Kirk I Erickson
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute (iMUDS), University of Granada, Granada 18071, Spain; Department of Psychology, University of Pittsburgh, Pittsburgh, PA 15260, USA; Centre for Healthy Ageing, Health Futures Institute, Murdoch University, Murdoch, WA 6150, Australia; School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA 6027, Australia; Advent Health Research Institute, Neuroscience Institute Orlando, Orlando, FL 32803, USA
| | - Irene Esteban-Cornejo
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute (iMUDS), University of Granada, Granada 18071, Spain; Physiopathology of Obesity and Nutrition Research Center (CIBERobn), Institute of Health Carlos III (ISCIII), Madrid 28029, Spain.
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Shaw AR, Vidoni ED, Key MN, Yates BA, Thorpe R. Using Focus Groups to Explore Older Black Men's Perception of Dietary Interventions. Am J Mens Health 2024; 18:15579883241241973. [PMID: 38613210 PMCID: PMC11015773 DOI: 10.1177/15579883241241973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 02/07/2024] [Accepted: 03/10/2024] [Indexed: 04/14/2024] Open
Abstract
Older Black men are underrepresented in research despite being disproportionately affected by Alzheimer's disease (AD) and cardiovascular (CV) risk factors related to AD compared with non-Hispanic Whites. Although dietary interventions have shown promise to reduce modifiable CV risk factors related to AD, Black Americans have lower adherence likely due to lack of cultural considerations. Using a noninterventional convergent parallel mixed-methods approach, this study examined the cultural contexts that inform perceptions of dietary interventions among older Midwestern Black men. All participants completed an online demographic and dietary habit survey prior to focus group discussions. Two focus group discussion sessions were conducted with a total of 10 cognitively normal Black men aged 55 years and older. Survey data were analyzed using a frequency analysis and qualitative data were analyzed using a six-step thematic analysis process. Most men indicated having hypertension (N = 7, 77.8%) and currently not following a dietary eating pattern (N = 8, 88.9%). Emerging themes identified included (1) knowledge of dementia, (2) perceptions of dietary interventions, (3) barriers impacting participation in dietary interventions, and (4) overcoming barriers to engage Black men in dietary interventions. Findings from this study should inform the design of future dietary interventions for AD prevention to enhance participation among older Black men.
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Affiliation(s)
- Ashley R. Shaw
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS, USA
| | - Eric D. Vidoni
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS, USA
| | - Mickeal N. Key
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS, USA
| | - Brandon A. Yates
- Indiana Center for Musculoskeletal Health, School of Medicine, Indiana University, Indianapolis, IN, USA
| | - Roland Thorpe
- Department of Health Behavior and Society, Johns Hopkins University, Baltimore, MD, USA
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Abdullahi A, Wong TW, Ng SS. Understanding the mechanisms of disease modifying effects of aerobic exercise in people with Alzheimer's disease. Ageing Res Rev 2024; 94:102202. [PMID: 38272266 DOI: 10.1016/j.arr.2024.102202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/06/2023] [Accepted: 01/17/2024] [Indexed: 01/27/2024]
Abstract
Alzheimer's disease (AD) is a very disabling disease. Pathologically, it is characterized by the presence of amyloid plaques and neurofibrillary tangles in the brain that results in neurodegeneration. Its clinical manifestations include progressive memory impairment, language decline and difficulty in carrying out activities of daily living (ADL). The disease is managed using interventions such as pharmacological interventions and aerobic exercise. Use of aerobic exercise has shown some promises in reducing the risk of developing AD, and improving cognitive function and the ability to carry out both basic and instrumental ADL. Although, the mechanisms through which aerobic exercise improves AD are poorly understood, improvement in vascular function, brain glucose metabolism and cardiorespiratory fitness, increase in antioxidant capacity and haemoglobin level, amelioration of immune-related and inflammatory responses, modulation of concentration of circulating Neurotrophins and peptides and decrease in concentration of tau protein and cortisol level among others seem to be the possible mechanisms. Therefore, understanding these mechanisms is important to help characterize the dose and the nature of the aerobic exercise to be given. In addition, they may also help in finding ways to optimize other interventions such as the pharmacological interventions. However, more quality studies are needed to verify the mechanisms.
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Affiliation(s)
- Auwal Abdullahi
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, China
| | - Thomson Wl Wong
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, China
| | - Shamay Sm Ng
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, China.
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Slee MG, Rainey‐Smith SR, Villemagne VL, Doecke JD, Sohrabi HR, Taddei K, Ames D, Dore V, Maruff P, Laws SM, Masters CL, Rowe CC, Martins RN, Erickson KI, Brown BM. Physical activity and brain amyloid beta: A longitudinal analysis of cognitively unimpaired older adults. Alzheimers Dement 2024; 20:1350-1359. [PMID: 37984813 PMCID: PMC10917015 DOI: 10.1002/alz.13556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/13/2023] [Accepted: 10/23/2023] [Indexed: 11/22/2023]
Abstract
INTRODUCTION The current study evaluated the relationship between habitual physical activity (PA) levels and brain amyloid beta (Aβ) over 15 years in a cohort of cognitively unimpaired older adults. METHODS PA and Aβ measures were collected over multiple timepoints from 731 cognitively unimpaired older adults participating in the Australian Imaging, Biomarkers and Lifestyle (AIBL) Study of Aging. Regression modeling examined cross-sectional and longitudinal relationships between PA and brain Aβ. Moderation analyses examined apolipoprotein E (APOE) ε4 carriage impact on the PA-Aβ relationship. RESULTS PA was not associated with brain Aβ at baseline (β = -0.001, p = 0.72) or over time (β = -0.26, p = 0.24). APOE ε4 status did not moderate the PA-Aβ relationship over time (β = 0.12, p = 0.73). Brain Aβ levels did not predict PA trajectory (β = -54.26, p = 0.59). DISCUSSION Our study did not identify a relationship between habitual PA and brain Aβ levels. HIGHLIGHTS Physical activity levels did not predict brain amyloid beta (Aβ) levels over time in cognitively unimpaired older adults (≥60 years of age). Apolipoprotein E (APOE) ε4 carrier status did not moderate the physical activity-brain Aβ relationship over time. Physical activity trajectories were not impacted by brain Aβ levels.
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Affiliation(s)
- Michael G. Slee
- Centre for Healthy AgeingHealthy Futures InstituteMurdoch UniversityMurdochWestern AustraliaAustralia
| | - Stephanie R. Rainey‐Smith
- Centre for Healthy AgeingHealthy Futures InstituteMurdoch UniversityMurdochWestern AustraliaAustralia
- School of Medical and Health SciencesEdith Cowan UniversityJoondalupWestern AustraliaAustralia
- Australian Alzheimer's Research FoundationNedlandsWestern AustraliaAustralia
- School of Psychological ScienceUniversity of Western AustraliaCrawleyWestern AustraliaAustralia
| | - Victor L. Villemagne
- Department of Molecular Imaging & TherapyAustin HealthHeidelbergVictoriaAustralia
- Department of PsychiatryUniversity of PittsburghPittsburghPennsylvaniaUSA
- Centre for Precision HealthEdith Cowan UniversityJoondalupWestern AustraliaAustralia
| | - James D. Doecke
- The Australian e‐Health Research CentreCSIROHerstonQueenslandAustralia
| | - Hamid R. Sohrabi
- Centre for Healthy AgeingHealthy Futures InstituteMurdoch UniversityMurdochWestern AustraliaAustralia
- School of Medical and Health SciencesEdith Cowan UniversityJoondalupWestern AustraliaAustralia
- Australian Alzheimer's Research FoundationNedlandsWestern AustraliaAustralia
- Department of Biomedical SciencesMacquarie UniversitySydneyNew South WalesAustralia
| | - Kevin Taddei
- School of Medical and Health SciencesEdith Cowan UniversityJoondalupWestern AustraliaAustralia
- Australian Alzheimer's Research FoundationNedlandsWestern AustraliaAustralia
| | - David Ames
- The Florey Institute of Neuroscience and Mental HealthUniversity of MelbourneParkvilleVictoriaAustralia
- National Ageing Research InstituteParkvilleVictoriaAustralia
- Academic Unit for Psychiatry of Old AgeUniversity of MelbourneCarltonVictoriaAustralia
| | - Vincent Dore
- Department of Molecular Imaging & TherapyAustin HealthHeidelbergVictoriaAustralia
| | - Paul Maruff
- The Florey Institute of Neuroscience and Mental HealthUniversity of MelbourneParkvilleVictoriaAustralia
- Cogstate LtdMelbourneVictoriaAustralia
| | - Simon M. Laws
- Centre for Precision HealthEdith Cowan UniversityJoondalupWestern AustraliaAustralia
- Collaborative Genomics and Translation GroupSchool of Medical and Health SciencesEdith Cowan UniversityJoondalupWestern AustraliaAustralia
- Curtin Medical SchoolCurtin UniversityBentleyWestern AustraliaAustralia
| | - Colin L. Masters
- The Florey Institute of Neuroscience and Mental HealthUniversity of MelbourneParkvilleVictoriaAustralia
| | - Christopher C. Rowe
- Department of Molecular Imaging & TherapyAustin HealthHeidelbergVictoriaAustralia
- The Florey Institute of Neuroscience and Mental HealthUniversity of MelbourneParkvilleVictoriaAustralia
| | - Ralph N. Martins
- School of Medical and Health SciencesEdith Cowan UniversityJoondalupWestern AustraliaAustralia
- Australian Alzheimer's Research FoundationNedlandsWestern AustraliaAustralia
- Department of Biomedical SciencesMacquarie UniversitySydneyNew South WalesAustralia
| | - Kirk I. Erickson
- Department of PsychologyUniversity of PittsburghPittsburghPennsylvaniaUSA
| | - Belinda M. Brown
- Centre for Healthy AgeingHealthy Futures InstituteMurdoch UniversityMurdochWestern AustraliaAustralia
- School of Medical and Health SciencesEdith Cowan UniversityJoondalupWestern AustraliaAustralia
- Australian Alzheimer's Research FoundationNedlandsWestern AustraliaAustralia
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Clutton J, Montgomery RN, Mudaranthakam DP, Blocker EM, Shaw AR, Szabo Reed AN, Vidoni ED. An open-source system for efficient clinical trial support: The COMET study experience. PLoS One 2023; 18:e0293874. [PMID: 38011138 PMCID: PMC10681164 DOI: 10.1371/journal.pone.0293874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 10/05/2023] [Indexed: 11/29/2023] Open
Abstract
Exercise clinical trials are complex, logistically burdensome, and require a well-coordinated multi-disciplinary approach. Challenges include managing, curating, and reporting on many disparate information sources, while remaining responsive to a variety of stakeholders. The Combined Exercise Trial (COMET, NCT04848038) is a one-year comparison of three exercise modalities delivered in the community. Target enrollment is 280 individuals over 4 years. To support rigorous execution of COMET, the study team has developed a suite of scripts and dashboards to assist study stakeholders in each of their various functions. The result is a highly automated study system that preserves rigor, increases communication, and reduces staff burden. This manuscript describes system considerations and the COMET approach to data management and use, with a goal of encouraging further development and adaptation by other study teams in various fields.
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Affiliation(s)
- Jonathan Clutton
- University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | | | | | - Erin M. Blocker
- Emporia State University, Emporia, Kansas, United States of America
| | - Ashley R. Shaw
- University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Amanda N. Szabo Reed
- University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Eric D. Vidoni
- University of Kansas Medical Center, Kansas City, Kansas, United States of America
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Gluck MA, Gills JL, Fausto BA, Malin SK, Duberstein PR, Erickson KI, Hu L. Examining the efficacy of a cardio-dance intervention on brain health and the moderating role of ABCA7 in older African Americans: a protocol for a randomized controlled trial. Front Aging Neurosci 2023; 15:1266423. [PMID: 38076534 PMCID: PMC10710152 DOI: 10.3389/fnagi.2023.1266423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 11/06/2023] [Indexed: 02/12/2024] Open
Abstract
Introduction African Americans are two to three times more likely to be diagnosed with Alzheimer's disease (AD) compared to White Americans. Exercise is a lifestyle behavior associated with neuroprotection and decreased AD risk, although most African Americans, especially older adults, perform less than the recommended 150 min/week of moderate-to-vigorous intensity exercise. This article describes the protocol for a Phase III randomized controlled trial that will examine the effects of cardio-dance aerobic exercise on novel AD cognitive and neural markers of hippocampal-dependent function (Aims #1 and #2) and whether exercise-induced neuroprotective benefits may be modulated by an AD genetic risk factor, ABCA7 rs3764650 (Aim #3). We will also explore the effects of exercise on blood-based biomarkers for AD. Methods and analysis This 6-month trial will include 280 African Americans (≥ 60 years), who will be randomly assigned to 3 days/week of either: (1) a moderate-to-vigorous cardio-dance fitness condition or (2) a low-intensity strength, flexibility, and balance condition for 60 min/session. Participants will complete health and behavioral surveys, neuropsychological testing, saliva and venipuncture, aerobic fitness, anthropometrics and resting-state structural and functional neuroimaging at study entry and 6 months. Discussion Results from this investigation will inform future exercise trials and the development of prescribed interventions that aim to reduce the risk of AD in African Americans.
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Affiliation(s)
- Mark A. Gluck
- Center for Molecular and Behavioral Neuroscience, Rutgers University-Newark, Newark, NJ, United States
| | - Joshua L. Gills
- Center for Molecular and Behavioral Neuroscience, Rutgers University-Newark, Newark, NJ, United States
| | - Bernadette A. Fausto
- Center for Molecular and Behavioral Neuroscience, Rutgers University-Newark, Newark, NJ, United States
| | - Steven K. Malin
- Department of Kinesiology and Health, Rutgers University, New Brunswick, NJ, United States
| | - Paul R. Duberstein
- Department of Health Behavior, Society and Policy, Rutgers School of Public Health, Piscataway, NJ, United States
| | | | - Liangyuan Hu
- Department of Biostatistics and Epidemiology, School of Public Health, Rutgers School of Public Health, Piscataway, NJ, United States
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Lee DY, Im SC, Kang NY, Kim K. Analysis of Effect of Intensity of Aerobic Exercise on Cognitive and Motor Functions and Neurotrophic Factor Expression Patterns in an Alzheimer's Disease Rat Model. J Pers Med 2023; 13:1622. [PMID: 38003937 PMCID: PMC10672300 DOI: 10.3390/jpm13111622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/13/2023] [Accepted: 11/16/2023] [Indexed: 11/26/2023] Open
Abstract
The effect of aerobic exercise at different intensities on Alzheimer's disease (AD) still remains unclear. We investigated the effect of aerobic exercise at different intensities on cognitive and motor functions and neurotrophic factor expression. Thirty-two AD-induced rats were randomly assigned to control (CG), low-intensity (Group I), medium-intensity (Group II), and high-intensity (Group III) exercise groups. Each group, except for the CG, performed aerobic exercise for 20 min a day five times a week. After performing aerobic exercise for 4 weeks, their cognitive and motor functions and neurotrophic factor expression patterns were analyzed and compared between the groups. All variables of cognitive and motor functions and neurotrophic factor expression were significantly improved in Groups I, II, and III compared to those in the CG (p < 0.05). Among the neurotrophic factors, brain-derived neurotrophic factor (BDNF) expression was significantly improved in Group III compared to that in Groups I and II (p < 0.05). In the intra-group comparison of cognitive and motor functions, no significant difference was observed in CG, but the aerobic exercise groups showed improvements. Only Group III showed a significant improvement in the time it took to find eight food items accurately (p < 0.05). Aerobic exercise improved the cognitive and motor functions and neurotrophic factor expression patterns in the AD-induced rat model, with high-intensity aerobic exercise having greater effects on cognitive function and BDNF expression.
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Affiliation(s)
| | | | | | - Kyoung Kim
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Gyeongsan 38453, Republic of Korea; (D.-Y.L.); (S.-C.I.); (N.-Y.K.)
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12
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Ehret F, Pelz MS, Senko AN, Soto KEG, Liu H, Kempermann G. Presymptomatic Reduction of Individuality in the App NL-F Knockin Model of Alzheimer's Disease. Biol Psychiatry 2023; 94:721-731. [PMID: 37076091 DOI: 10.1016/j.biopsych.2023.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 04/06/2023] [Accepted: 04/07/2023] [Indexed: 04/21/2023]
Abstract
BACKGROUND One-third of the risk for Alzheimer's disease is explained by environment and lifestyle, but Alzheimer's disease pathology might also affect lifestyle and thereby impair the individual potential for health behavior and prevention. METHODS We examined in mice how the AppNL-F/NL-F (NL-F) knockin mutation affects the presymptomatic response to environmental enrichment (ENR) as an experimental paradigm addressing nongenetic factors. We assessed the emergence of interindividual phenotypic variation under the condition that both the genetic background and the shared environment were held constant, thereby isolating the contribution of individual behavior (nonshared environment). RESULTS After 4 months of ENR, the mean and variability of plasma ApoE were increased in NL-F mice, suggesting a presymptomatic variation in pathogenic processes. Roaming entropy as a measure of behavioral activity was continuously assessed with radiofrequency identification (RFID) technology and revealed reduced habituation and variance in NL-F mice compared with control animals, which do not carry a Beyreuther/Iberian mutation. Intraindividual variation decreased, while behavioral stability was reduced in NL-F mice. Seven months after discontinuation of ENR, we found no difference in plaque size and number, but ENR increased variance in hippocampal plaque counts in NL-F mice. A reactive increase in adult hippocampal neurogenesis in NL-F mice, known from other models, was normalized by ENR. CONCLUSIONS Our data suggest that while NL-F has early effects on individual behavioral patterns in response to ENR, there are lasting effects on cellular plasticity even after the discontinuation of ENR. Hence, early behavior matters for maintaining individual behavioral trajectories and brain plasticity even under maximally constrained conditions.
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Affiliation(s)
- Fanny Ehret
- German Center for Neurodegenerative Diseases Dresden, Dresden, Germany; Center for Regenerative Therapies Technical University Dresden, Dresden, Germany; Institute of Anatomy, Faculty of Medicine Carl Gustav Carus, Technical University Dresden, Dresden, Germany
| | - Meike S Pelz
- German Center for Neurodegenerative Diseases Dresden, Dresden, Germany; Center for Regenerative Therapies Technical University Dresden, Dresden, Germany
| | - Anna N Senko
- German Center for Neurodegenerative Diseases Dresden, Dresden, Germany; Center for Regenerative Therapies Technical University Dresden, Dresden, Germany
| | - Karla E G Soto
- German Center for Neurodegenerative Diseases Dresden, Dresden, Germany; Center for Regenerative Therapies Technical University Dresden, Dresden, Germany
| | - Hang Liu
- German Center for Neurodegenerative Diseases Dresden, Dresden, Germany; Center for Regenerative Therapies Technical University Dresden, Dresden, Germany
| | - Gerd Kempermann
- German Center for Neurodegenerative Diseases Dresden, Dresden, Germany; Center for Regenerative Therapies Technical University Dresden, Dresden, Germany.
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13
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Gouveia M, Schmidt C, Basilio PG, Aveiro SS, Domingues P, Xia K, Colón W, Vitorino R, Ferreira R, Santos M, Vieira SI, Ribeiro F. Exercise training decreases the load and changes the content of circulating SDS-resistant protein aggregates in patients with heart failure with reduced ejection fraction. Mol Cell Biochem 2023:10.1007/s11010-023-04884-z. [PMID: 37902886 DOI: 10.1007/s11010-023-04884-z] [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: 07/25/2023] [Accepted: 10/15/2023] [Indexed: 11/01/2023]
Abstract
BACKGROUND Heart failure (HF) often disrupts the protein quality control (PQC) system leading to protein aggregate accumulation. Evidence from tissue biopsies showed that exercise restores PQC system in HF; however, little is known about its effects on plasma proteostasis. AIM To determine the effects of exercise training on the load and composition of plasma SDS-resistant protein aggregates (SRA) in patients with HF with reduced ejection fraction (HFrEF). METHODS Eighteen patients with HFrEF (age: 63.4 ± 6.5 years; LVEF: 33.4 ± 11.6%) participated in a 12-week combined (aerobic plus resistance) exercise program (60 min/session, twice per week). The load and content of circulating SRA were assessed using D2D SDS-PAGE and mass spectrometry. Cardiorespiratory fitness, quality of life, and circulating levels of high-sensitive C-reactive protein, N-terminal pro-B-type natriuretic peptide (NT-proBNP), haptoglobin and ficolin-3, were also evaluated at baseline and after the exercise program. RESULTS The exercise program decreased the plasma SRA load (% SRA/total protein: 38.0 ± 8.9 to 36.1 ± 9.7%, p = 0.018; % SRA/soluble fraction: 64.3 ± 27.1 to 59.8 ± 27.7%, p = 0.003). Plasma SRA of HFrEF patients comprised 31 proteins, with α-2-macroglobulin and haptoglobin as the most abundant ones. The exercise training significantly increased haptoglobin plasma levels (1.03 ± 0.40 to 1.11 ± 0.46, p = 0.031), while decreasing its abundance in SRA (1.83 ± 0.54 × 1011 to 1.51 ± 0.59 × 1011, p = 0.049). Cardiorespiratory fitness [16.4(5.9) to 19.0(5.2) ml/kg/min, p = 0.002], quality of life, and circulating NT-proBNP [720.0(850.0) to 587.0(847.3) pg/mL, p = 0.048] levels, also improved after the exercise program. CONCLUSION Exercise training reduced the plasma SRA load and enhanced PQC, potentially via haptoglobin-mediated action, while improving cardiorespiratory fitness and quality of life of patients with HFrEF.
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Affiliation(s)
- Marisol Gouveia
- Department of Medical Sciences, iBiMED - Institute of Biomedicine, University of Aveiro, Building 30, Agras do Crasto - Campus Universitário de Santiago, Aveiro, 3810-193, Portugal.
| | - Cristine Schmidt
- Surgery and Physiology Department, Faculty of Medicine, University of Porto, Porto, Portugal
- Research Centre in Physical Activity, Health and Leisure, Faculty of Sport, University of Porto, Porto, Portugal
- Laboratory for Integrative and Translational Research in Population Health (ITR), Porto, Portugal
| | - Priscilla Gois Basilio
- Research Centre in Physical Activity, Health and Leisure, Faculty of Sport, University of Porto, Porto, Portugal
| | - Susana S Aveiro
- Mass Spectrometry Centre, Department of Chemistry, LAQV REQUIMTE, University of Aveiro, Aveiro, Portugal
- GreenCoLab - Green Ocean Association, University of Algarve, Faro, Portugal
| | - Pedro Domingues
- Mass Spectrometry Centre, Department of Chemistry, LAQV REQUIMTE, University of Aveiro, Aveiro, Portugal
| | - Ke Xia
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, Troy, NY, USA
- Centre for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY, USA
| | - Wilfredo Colón
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, Troy, NY, USA
- Centre for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY, USA
| | - Rui Vitorino
- Department of Medical Sciences, iBiMED - Institute of Biomedicine, University of Aveiro, Building 30, Agras do Crasto - Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
- Surgery and Physiology Department, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Rita Ferreira
- Department of Chemistry, QOPNA & LAQV-REQUIMTE, University of Aveiro, Aveiro, Portugal
| | - Mário Santos
- Laboratory for Integrative and Translational Research in Population Health (ITR), Porto, Portugal
- Serviço de Cardiologia, Hospital Santo António, Centro Hospitalar Universitário do Porto, Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar, UMIB, University of Porto, Porto, Portugal
| | - Sandra I Vieira
- Department of Medical Sciences, iBiMED - Institute of Biomedicine, University of Aveiro, Building 30, Agras do Crasto - Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
| | - Fernando Ribeiro
- School of Health Sciences, iBiMED - Institute of Biomedicine, University of Aveiro, Aveiro, Portugal
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14
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Andrade-Guerrero J, Rodríguez-Arellano P, Barron-Leon N, Orta-Salazar E, Ledesma-Alonso C, Díaz-Cintra S, Soto-Rojas LO. Advancing Alzheimer's Therapeutics: Exploring the Impact of Physical Exercise in Animal Models and Patients. Cells 2023; 12:2531. [PMID: 37947609 PMCID: PMC10648553 DOI: 10.3390/cells12212531] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 10/18/2023] [Accepted: 10/25/2023] [Indexed: 11/12/2023] Open
Abstract
Alzheimer's disease (AD) is the main neurodegenerative disorder characterized by several pathophysiological features, including the misfolding of the tau protein and the amyloid beta (Aβ) peptide, neuroinflammation, oxidative stress, synaptic dysfunction, metabolic alterations, and cognitive impairment. These mechanisms collectively contribute to neurodegeneration, necessitating the exploration of therapeutic approaches with multiple targets. Physical exercise has emerged as a promising non-pharmacological intervention for AD, with demonstrated effects on promoting neurogenesis, activating neurotrophic factors, reducing Aβ aggregates, minimizing the formation of neurofibrillary tangles (NFTs), dampening inflammatory processes, mitigating oxidative stress, and improving the functionality of the neurovascular unit (NVU). Overall, the neuroprotective effects of exercise are not singular, but are multi-targets. Numerous studies have investigated physical exercise's potential in both AD patients and animal models, employing various exercise protocols to elucidate the underlying neurobiological mechanisms and effects. The objective of this review is to analyze the neurological therapeutic effects of these exercise protocols in animal models and compare them with studies conducted in AD patients. By translating findings from different approaches, this review aims to identify opportune, specific, and personalized therapeutic windows, thus advancing research on the use of physical exercise with AD patients.
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Affiliation(s)
- Jesús Andrade-Guerrero
- Laboratorio de Patogénesis Molecular, Laboratorio 4, Edificio A4, Carrera Médico Cirujano, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla 54090, Mexico;
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Queretaro 76230, Mexico; (P.R.-A.); (N.B.-L.); (E.O.-S.); (C.L.-A.)
| | - Paola Rodríguez-Arellano
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Queretaro 76230, Mexico; (P.R.-A.); (N.B.-L.); (E.O.-S.); (C.L.-A.)
| | - Nayeli Barron-Leon
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Queretaro 76230, Mexico; (P.R.-A.); (N.B.-L.); (E.O.-S.); (C.L.-A.)
| | - Erika Orta-Salazar
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Queretaro 76230, Mexico; (P.R.-A.); (N.B.-L.); (E.O.-S.); (C.L.-A.)
| | - Carlos Ledesma-Alonso
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Queretaro 76230, Mexico; (P.R.-A.); (N.B.-L.); (E.O.-S.); (C.L.-A.)
| | - Sofía Díaz-Cintra
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Queretaro 76230, Mexico; (P.R.-A.); (N.B.-L.); (E.O.-S.); (C.L.-A.)
| | - Luis O. Soto-Rojas
- Laboratorio de Patogénesis Molecular, Laboratorio 4, Edificio A4, Carrera Médico Cirujano, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla 54090, Mexico;
- Red MEDICI, Carrera Médico Cirujano, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla 54090, Mexico
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15
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Solis-Urra P, Molina-Hidalgo C, García-Rivero Y, Costa-Rodriguez C, Mora-Gonzalez J, Fernandez-Gamez B, Olvera-Rojas M, Coca-Pulido A, Toval A, Bellón D, Sclafani A, Martín-Fuentes I, Triviño-Ibañez EM, de Teresa C, Huang H, Grove G, Hillman CH, Kramer AF, Catena A, Ortega FB, Gómez-Río M, Erickson KI, Esteban-Cornejo I. Active Gains in brain Using Exercise During Aging (AGUEDA): protocol for a randomized controlled trial. Front Hum Neurosci 2023; 17:1168549. [PMID: 37284481 PMCID: PMC10239947 DOI: 10.3389/fnhum.2023.1168549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 05/02/2023] [Indexed: 06/08/2023] Open
Abstract
Alzheimer's disease is currently the leading cause of dementia and one of the most expensive, lethal and severe diseases worldwide. Age-related decline in executive function is widespread and plays a key role in subsequent dementia risk. Physical exercise has been proposed as one of the leading non-pharmaceutical approaches to improve executive function and ameliorate cognitive decline. This single-site, two-arm, single-blinded, randomized controlled trial (RCT) will include 90 cognitively normal older adults, aged 65-80 years old. Participants will be randomized to a 24-week resistance exercise program (3 sessions/week, 60 min/session, n = 45), or a wait-list control group (n = 45) which will be asked to maintain their usual lifestyle. All study outcomes will be assessed at baseline and at 24-weeks after the exercise program, with a subset of selected outcomes assessed at 12-weeks. The primary outcome will be indicated by the change in an executive function composite score assessed with a comprehensive neuropsychological battery and the National Institutes of Health Toolbox Cognition Battery. Secondary outcomes will include changes in brain structure and function and amyloid deposition, other cognitive outcomes, and changes in molecular biomarkers assessed in blood, saliva, and fecal samples, physical function, muscular strength, body composition, mental health, and psychosocial parameters. We expect that the resistance exercise program will have positive effects on executive function and related brain structure and function, and will help to understand the molecular, structural, functional, and psychosocial mechanisms involved.
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Affiliation(s)
- Patricio Solis-Urra
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute, University of Granada, Granada, Spain
- Servicio de Medicina Nuclear, Hospital Universitario Virgen de las Nieves, Granada, Spain
- Faculty of Education and Social Sciences, Universidad Andrés Bello, Viña del Mar, Chile
| | - Cristina Molina-Hidalgo
- Department of Psychology, University of Pittsburgh, Pittsburgh, PA, United States
- AdventHealth Research Institute, Neuroscience Institute, Orlando, FL, United States
| | - Yolanda García-Rivero
- Servicio de Medicina Nuclear, Hospital Universitario Virgen de las Nieves, Granada, Spain
- ibs.GRANADA Instituto de Investigación Biosanitaria, Granada, Spain
| | | | - Jose Mora-Gonzalez
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute, University of Granada, Granada, Spain
| | - Beatriz Fernandez-Gamez
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute, University of Granada, Granada, Spain
| | - Marcos Olvera-Rojas
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute, University of Granada, Granada, Spain
| | - Andrea Coca-Pulido
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute, University of Granada, Granada, Spain
| | - Angel Toval
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute, University of Granada, Granada, Spain
| | - Darío Bellón
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute, University of Granada, Granada, Spain
| | - Alessandro Sclafani
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute, University of Granada, Granada, Spain
| | - Isabel Martín-Fuentes
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute, University of Granada, Granada, Spain
| | - Eva María Triviño-Ibañez
- Servicio de Medicina Nuclear, Hospital Universitario Virgen de las Nieves, Granada, Spain
- ibs.GRANADA Instituto de Investigación Biosanitaria, Granada, Spain
| | - Carlos de Teresa
- Andalusian Centre of Sports Medicine, Consejería de Turismo y Deporte, Granada, Spain
| | - Haiqing Huang
- Department of Psychology, University of Pittsburgh, Pittsburgh, PA, United States
| | - George Grove
- Department of Psychology, University of Pittsburgh, Pittsburgh, PA, United States
| | - Charles H. Hillman
- Center for Cognitive and Brain Health, Northeastern University, Boston, MA, United States
- Department of Psychology, Northeastern University, Boston, MA, United States
- Department of Physical Therapy, Movement, and Rehabilitation Sciences, Northeastern University, Boston, MA, United States
| | - Arthur F. Kramer
- Center for Cognitive and Brain Health, Northeastern University, Boston, MA, United States
- Beckman Institute, University of Illinois, Urbana, IL, United States
| | - Andrés Catena
- School of Psychology, University of Granada, Granada, Spain
| | - Francisco B. Ortega
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute, University of Granada, Granada, Spain
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Manuel Gómez-Río
- Servicio de Medicina Nuclear, Hospital Universitario Virgen de las Nieves, Granada, Spain
- ibs.GRANADA Instituto de Investigación Biosanitaria, Granada, Spain
| | - Kirk I. Erickson
- Department of Psychology, University of Pittsburgh, Pittsburgh, PA, United States
- AdventHealth Research Institute, Neuroscience Institute, Orlando, FL, United States
| | - Irene Esteban-Cornejo
- Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute, University of Granada, Granada, Spain
- ibs.GRANADA Instituto de Investigación Biosanitaria, Granada, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
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16
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Ciria LF, Román-Caballero R, Vadillo MA, Holgado D, Luque-Casado A, Perakakis P, Sanabria D. An umbrella review of randomized control trials on the effects of physical exercise on cognition. Nat Hum Behav 2023:10.1038/s41562-023-01554-4. [PMID: 36973359 DOI: 10.1038/s41562-023-01554-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 02/09/2023] [Indexed: 03/29/2023]
Abstract
Extensive research links regular physical exercise to an overall enhancement of cognitive function across the lifespan. Here we assess the causal evidence supporting this relationship in the healthy population, using an umbrella review of meta-analyses limited to randomized controlled trials (RCTs). Despite most of the 24 reviewed meta-analyses reporting a positive overall effect, our assessment reveals evidence of low statistical power in the primary RCTs, selective inclusion of studies, publication bias and large variation in combinations of pre-processing and analytic decisions. In addition, our meta-analysis of all the primary RCTs included in the revised meta-analyses shows small exercise-related benefits (d = 0.22, 95% confidence interval 0.16 to 0.28) that became substantially smaller after accounting for key moderators (that is, active control and baseline differences; d = 0.13, 95% confidence interval 0.07 to 0.20), and negligible after correcting for publication bias (d = 0.05, 95% confidence interval -0.09 to 0.14). These findings suggest caution in claims and recommendations linking regular physical exercise to cognitive benefits in the healthy human population until more reliable causal evidence accumulates.
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Affiliation(s)
- Luis F Ciria
- Mind, Brain and Behavior Research Center (CIMCYC), University of Granada, Granada, Spain.
- Department of Experimental Psychology, University of Granada, Granada, Spain.
| | - Rafael Román-Caballero
- Mind, Brain and Behavior Research Center (CIMCYC), University of Granada, Granada, Spain
- Department of Experimental Psychology, University of Granada, Granada, Spain
| | - Miguel A Vadillo
- Department of Basic Psychology, Autonomous University of Madrid, Madrid, Spain
| | - Darias Holgado
- Department of Experimental Psychology, University of Granada, Granada, Spain
- Institute of Sport Sciences, University of Lausanne, Quartier UNIL-Centre, Bâtiment Synathlon, Lausanne, Switzerland
| | | | - Pandelis Perakakis
- Department of Social, Work, and Differential Psychology, Complutense University of Madrid, Madrid, Spain
| | - Daniel Sanabria
- Mind, Brain and Behavior Research Center (CIMCYC), University of Granada, Granada, Spain.
- Department of Experimental Psychology, University of Granada, Granada, Spain.
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17
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Min J, Rouanet J, Martini AC, Nashiro K, Yoo HJ, Porat S, Cho C, Wan J, Cole SW, Head E, Nation DA, Thayer JF, Mather M. Modulating heart rate oscillation affects plasma amyloid beta and tau levels in younger and older adults. Sci Rep 2023; 13:3967. [PMID: 36894565 PMCID: PMC9998394 DOI: 10.1038/s41598-023-30167-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 02/16/2023] [Indexed: 03/11/2023] Open
Abstract
Slow paced breathing via heart rate variability (HRV) biofeedback stimulates vagus-nerve pathways that counter noradrenergic stress and arousal pathways that can influence production and clearance of Alzheimer's disease (AD)-related proteins. Thus, we examined whether HRV biofeedback intervention affects plasma Αβ40, Αβ42, total tau (tTau), and phosphorylated tau-181 (pTau-181) levels. We randomized healthy adults (N = 108) to use slow-paced breathing with HRV biofeedback to increase heart rate oscillations (Osc+) or to use personalized strategies with HRV biofeedback to decrease heart rate oscillations (Osc-). They practiced 20-40 min daily. Four weeks of practicing the Osc+ and Osc- conditions produced large effect size differences in change in plasma Aβ40 and Aβ42 levels. The Osc+ condition decreased plasma Αβ while the Osc- condition increased Αβ. Decreases in Αβ were associated with decreases in gene transcription indicators of β-adrenergic signaling, linking effects to the noradrenergic system. There were also opposing effects of the Osc+ and Osc- interventions on tTau for younger adults and pTau-181 for older adults. These results provide novel data supporting a causal role of autonomic activity in modulating plasma AD-related biomarkers.Trial registration: NCT03458910 (ClinicalTrials.gov); first posted on 03/08/2018.
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Affiliation(s)
- Jungwon Min
- University of Southern California, Los Angeles, CA, USA
| | | | | | - Kaoru Nashiro
- University of Southern California, Los Angeles, CA, USA
| | - Hyun Joo Yoo
- University of Southern California, Los Angeles, CA, USA
| | - Shai Porat
- University of Southern California, Los Angeles, CA, USA
| | - Christine Cho
- University of Southern California, Los Angeles, CA, USA
| | - Junxiang Wan
- University of Southern California, Los Angeles, CA, USA
| | - Steve W Cole
- University of California, Los Angeles, Los Angeles, CA, USA
| | | | | | | | - Mara Mather
- University of Southern California, Los Angeles, CA, USA.
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18
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Frederiksen KS, Jensen CS, Høgh P, Gergelyffy R, Waldemar G, Andersen BB, Gottrup H, Vestergaard K, Wermuth L, Søndergaard HB, Sellebjerg F, Hasselbalch SG, Simonsen AH. Aerobic exercise does not affect serum neurofilament light in patients with mild Alzheimer's disease. Front Neurosci 2023; 17:1108191. [PMID: 36761410 PMCID: PMC9902368 DOI: 10.3389/fnins.2023.1108191] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 01/05/2023] [Indexed: 01/26/2023] Open
Abstract
Introduction Aerobic exercise has been shown to modify Alzheimer pathology in animal models, and in patients with multiple sclerosis to reduce neurofilament light (NfL), a biomarker of neurodegeneration. Objective To investigate whether a 16-week aerobic exercise program was able to reduce serum NfL in patients with mild Alzheimer's disease (AD). Methods This is a secondary analysis of data from the multi-center Preserving Cognition, Quality of Life, Physical Health, and Functional Ability in Alzheimer's disease: The Effect of Physical Exercise (ADEX) study. Participants were randomized to 16 weeks of moderate intensity aerobic exercise or usual care. Clinical assessment and measurement of serum NfL was done at baseline and after the intervention. Results A total of 136 participants were included in the analysis. Groups were comparable at baseline except for APOEε4 carriership which was higher in the usual care group (75.3 versus 60.2%; p = 0.04). There was no effect of the intervention on serum NfL [intervention: baseline NfL (pg/mL) 25.76, change from baseline 0.87; usual care: baseline 27.09, change from baseline -1.16, p = 0.09]. Conclusion The findings do not support an effect of the exercise intervention on a single measure of neurodegeneration in AD. Further studies are needed using other types and durations of exercise and other measures of neurodegeneration. Clinical trial registration clinicaltrials.gov, identifier NCT01681602.
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Affiliation(s)
- Kristian Steen Frederiksen
- Department of Neurology, Danish Dementia Research Center, Copenhagen University Hospital–Rigshospitalet, Copenhagen, Denmark,*Correspondence: Kristian Steen Frederiksen,
| | - Camilla Steen Jensen
- Department of Neurology, Danish Dementia Research Center, Copenhagen University Hospital–Rigshospitalet, Copenhagen, Denmark
| | - Peter Høgh
- Department of Neurology, Regional Dementia Research Centre, Zealand University Hospital, University of Copenhagen, Copenhagen, Denmark,Department of Clinical Medicine, Regional Dementia Research Centre, Zealand University Hospital, University of Copenhagen, Copenhagen, Denmark
| | | | - Gunhild Waldemar
- Department of Neurology, Danish Dementia Research Center, Copenhagen University Hospital–Rigshospitalet, Copenhagen, Denmark,Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Birgitte Bo Andersen
- Department of Neurology, Danish Dementia Research Center, Copenhagen University Hospital–Rigshospitalet, Copenhagen, Denmark
| | - Hanne Gottrup
- Dementia Clinic, Aarhus University Hospital, Aarhus, Denmark
| | | | - Lene Wermuth
- Department of Neurology, Dementia Clinic, Slagelse Hospital, Slagelse, Denmark,Department of Regional Health Research, University of Southern Denmark, Odense, Denmark
| | - Helle Bach Søndergaard
- Danish Multiple Sclerosis Center, Copenhagen University Hospital–Rigshospitalet, Glostrup, Denmark
| | - Finn Sellebjerg
- Danish Multiple Sclerosis Center, Copenhagen University Hospital–Rigshospitalet, Glostrup, Denmark
| | - Steen Gregers Hasselbalch
- Department of Neurology, Danish Dementia Research Center, Copenhagen University Hospital–Rigshospitalet, Copenhagen, Denmark,Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Anja Hviid Simonsen
- Department of Neurology, Danish Dementia Research Center, Copenhagen University Hospital–Rigshospitalet, Copenhagen, Denmark
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19
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Devos H, Gustafson KM, Liao K, Ahmadnezhad P, Kuhlmann E, Estes BJ, Martin LE, Mahnken JD, Brooks WM, Burns JM. Effect of Cognitive Reserve on Physiological Measures of Cognitive Workload in Older Adults with Cognitive Impairments. J Alzheimers Dis 2023; 92:141-151. [PMID: 36710677 PMCID: PMC10023364 DOI: 10.3233/jad-220890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
BACKGROUND Cognitive reserve may protect against cognitive decline. OBJECTIVE This cross-sectional study investigated the association between cognitive reserve and physiological measures of cognitive workload in older adults with cognitive impairment. METHODS 29 older adults with cognitive impairment (age: 75±6, 11 (38%) women, MoCA: 20±7) and 19 with normal cognition (age: 74±6; 11 (58%) women; MoCA: 28±2) completed a working memory test of increasing task demand (0-, 1-, 2-back). Cognitive workload was indexed using amplitude and latency of the P3 event-related potential (ERP) at electrode sites Fz, Cz, and Pz, and changes in pupillary size, converted to an index of cognitive activity (ICA). The Cognitive Reserve Index questionnaire (CRIq) evaluated Education, Work Activity, and Leisure Time as a proxy of cognitive reserve. Linear mixed models evaluated the main effects of cognitive status, CRIq, and the interaction effect of CRIq by cognitive status on ERP and ICA. RESULTS The interaction effect of CRIq total score by cognitive status on P3 ERP and ICA was not significant. However, higher CRIq total scores were associated with lower ICA (p = 0.03). The interaction effects of CRIq subscores showed that Work Activity affected P3 amplitude (p = 0.03) and ICA (p = 0.03) differently between older adults with and without cognitive impairments. Similarly, Education affected ICA (p = 0.02) differently between the two groups. No associations were observed between CRIq and P3 latency. CONCLUSION Specific components of cognitive reserve affect cognitive workload and neural efficiency differently in older adults with and without cognitive impairments.
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Affiliation(s)
- Hannes Devos
- Department of Physical Therapy, Rehabilitation Science, and Athletic Training, University of Kansas Medical Center, Kansas City, KS, USA.,University of Kansas Alzheimer's Disease Research Center, University of Kansas Medical Center, Kansas City, KS, USA
| | - Kathleen M Gustafson
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS, USA.,Hoglund Biomedical Imaging Center, University of Kansas Medical Center, Kansas City, KS, USA
| | - Ke Liao
- Hoglund Biomedical Imaging Center, University of Kansas Medical Center, Kansas City, KS, USA
| | - Pedram Ahmadnezhad
- Department of Physical Therapy, Rehabilitation Science, and Athletic Training, University of Kansas Medical Center, Kansas City, KS, USA
| | - Emily Kuhlmann
- Department of Physical Therapy, Rehabilitation Science, and Athletic Training, University of Kansas Medical Center, Kansas City, KS, USA
| | - Bradley J Estes
- Department of Physical Therapy, Rehabilitation Science, and Athletic Training, University of Kansas Medical Center, Kansas City, KS, USA
| | - Laura E Martin
- Hoglund Biomedical Imaging Center, University of Kansas Medical Center, Kansas City, KS, USA.,Department of Population Health, University of Kansas Medical Center, Kansas City, KS, USA
| | - Jonathan D Mahnken
- University of Kansas Alzheimer's Disease Research Center, University of Kansas Medical Center, Kansas City, KS, USA.,Department of Biostatistics & Data Science, University of Kansas Medical Center, Kansas City, KS, USA
| | - William M Brooks
- University of Kansas Alzheimer's Disease Research Center, University of Kansas Medical Center, Kansas City, KS, USA.,Department of Neurology, University of Kansas Medical Center, Kansas City, KS, USA.,Hoglund Biomedical Imaging Center, University of Kansas Medical Center, Kansas City, KS, USA
| | - Jeffrey M Burns
- University of Kansas Alzheimer's Disease Research Center, University of Kansas Medical Center, Kansas City, KS, USA.,Department of Biostatistics & Data Science, University of Kansas Medical Center, Kansas City, KS, USA
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20
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Yu F, Han SY, Salisbury D, Pruzin JJ, Geda Y, Caselli RJ, Li D. Feasibility and preliminary effects of exercise interventions on plasma biomarkers of Alzheimer's disease in the FIT-AD trial: a randomized pilot study in older adults with Alzheimer's dementia. Pilot Feasibility Stud 2022; 8:243. [PMID: 36461134 PMCID: PMC9716660 DOI: 10.1186/s40814-022-01200-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 11/03/2022] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND Alzheimer's disease (AD) biomarkers have provided a unique opportunity to understand AD pathogenesis and monitor treatment responses. However, exercise trials show mixed effects on imagining and cerebrospinal fluid biomarkers of AD. The feasibility and effects of exercise on plasma biomarkers remain unknown. The primary objective of this study was to examine the feasibility of recruitment, retention, and blood sample collection in community-dwelling older adults with mild-to-moderate AD dementia. Secondarily, it estimated the preliminary effects of 6-month aerobic and stretching exercise on plasma amyloid-β42 and Aβ40 (Aβ42/40) ratio, phosphorylated tau (p-tau) 181, and total tau (t-tau). METHODS This pilot study was implemented in year 2 of the 2-parallel group FIT-AD trial that randomized 96 participants on a 2:1 allocation ratio to moderate-intensity cycling or low-intensity stretching for 20-50 min, 3 times/week for 6 months with 6-month follow-up. Investigators (except for the statistician) and data collectors were blinded to group assignment. Fasting blood samples were collected from 26 participants at baseline and 3 and 6 months. Plasma Aβ42, Aβ40, p-tau181, and t-tau were measured using Simoa™ assays. Data were analyzed using intention-to-treat, Cohen's d, and linear mixed models. RESULTSS The sample averaged 77.6±6.99 years old and 15.4±3.00 years of education with 65% being male and 96.2% being apolipoprotein epsilon 4 gene carriers. The recruitment rate was 76.5%. The retention rate was 100% at 3 months and 96.2% at 6 months. The rate of blood collection was 88.5% at 3 months and 96.2% at 6 months. Means (standard deviation) of within-group 6-month difference in the stretching and cycling group were 0.001 (0.012) and -0.001 (0.010) for Aβ42/40 ratio, 0.609 (1.417) pg/mL and 0.101(1.579) pg/mL for p-tau181, and -0.020 (0.279) pg/mL and -0.075 (0.215) pg/mL for t-tau. Effect sizes for within-group 6-month difference were observed for p-tau181 in stretching (d=0.43 [-0.33, 1.19]) and t-tau in cycling (-0.35 [-0.87, 0.17]). CONCLUSIONS Blood collections with fasting were well received by participants and feasible with high recruitment and retention rates. Plasma biomarkers of AD may be modifiable by exercise intervention. Important design considerations are provided for future Phase III trials. TRIALS REGISTRATION ClinicalTrials.gov Identifier: NCT01954550 and posted on October 1, 2013.
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Affiliation(s)
- Fang Yu
- Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ, USA.
| | - Seung Yong Han
- Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ, USA
| | - Dereck Salisbury
- Adult and Gerontological Health Cooperative, School of Nursing, University of Minnesota, Minneapolis, MN, USA
| | - Jeremy J Pruzin
- Department of Neurology, Banner Alzheimer's Institute, Phoenix, AZ, USA
| | - Yonas Geda
- Department of Neurology, and Franke Barrow Global Neuroscience Education Center, Barrow Neurological Institute, Phoenix, AZ, USA
| | | | - Danni Li
- Department of Lab Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA.
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21
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Perus L, Busto GU, Mangin JF, Le Bars E, Gabelle A. Effects of preventive interventions on neuroimaging biomarkers in subjects at-risk to develop Alzheimer's disease: A systematic review. Front Aging Neurosci 2022; 14:1014559. [PMID: 36506466 PMCID: PMC9730537 DOI: 10.3389/fnagi.2022.1014559] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 11/01/2022] [Indexed: 11/25/2022] Open
Abstract
Alzheimer's Disease (AD) is a multifactorial and complex neurodegenerative disorder. Some modifiable risk factors have been associated with an increased risk of appearance of the disease and/or cognitive decline. Preventive clinical trials aiming at reducing one or combined risk factors have been implemented and their potential effects assessed on cognitive trajectories and on AD biomarkers. However, the effect of interventions on surrogate markers, in particular imaging biomarkers, remains poorly understood. We conducted a review of the literature and analyzed 43 interventional studies that included physical exercise, nutrition, cognitive training or multidomain interventions, and assessed various brain imaging biomarkers, to determine the effects of preventive interventions on imaging biomarkers for subjects at-risk to develop AD. Deciphering the global and regional brain effect of each and combined interventions will help to better understand the interplay relationship between multimodal interventions, cognition, surrogate brain markers, and to better design primary and secondary outcomes for future preventive clinical trials. Those studies were pondered using generally-admitted quality criteria to reveal that interventions may affect the brain of patients with cognitive impairment rather than those without cognitive impairment thus indicating that particular care should be taken when selecting individuals for interventions. Additionally, a majority of the studies concurred on the effect of the interventions and particularly onto the frontal brain areas.
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Affiliation(s)
- Lisa Perus
- INM, Univ Montpellier, INSERM, CHU Montpellier, Montpellier, France,Department of Neurology, Memory Resources and Research Center, Gui de Chauliac Hospital, Montpellier, France,Institut d'Imagerie Fonctionnelle Humaine, I2FH, Department of Neuroradiology, Gui de Chauliac Hospital and University of Montpellier, Montpellier, France,CATI, US52-UAR2031, CEA, ICM, SU, CNRS, INSERM, APHP, Ile de France, France
| | - Germain U. Busto
- INM, Univ Montpellier, INSERM, CHU Montpellier, Montpellier, France,Department of Neurology, Memory Resources and Research Center, Gui de Chauliac Hospital, Montpellier, France,*Correspondence: Germain U. Busto
| | - Jean-François Mangin
- CATI, US52-UAR2031, CEA, ICM, SU, CNRS, INSERM, APHP, Ile de France, France,Université Paris-Saclay, CEA, CNRS, Neurospin, UMR9027 Baobab, Gif-sur-Yvette, France
| | - Emmanuelle Le Bars
- Institut d'Imagerie Fonctionnelle Humaine, I2FH, Department of Neuroradiology, Gui de Chauliac Hospital and University of Montpellier, Montpellier, France
| | - Audrey Gabelle
- INM, Univ Montpellier, INSERM, CHU Montpellier, Montpellier, France,Department of Neurology, Memory Resources and Research Center, Gui de Chauliac Hospital, Montpellier, France
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22
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Elsworthy RJ, Dunleavy C, Whitham M, Aldred S. Exercise for the prevention of Alzheimer's disease: Multiple pathways to promote non-amyloidogenic AβPP processing. AGING AND HEALTH RESEARCH 2022. [DOI: 10.1016/j.ahr.2022.100093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
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23
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Using a two-sample mendelian randomization analysis to explore the relationship between physical activity and Alzheimer's disease. Sci Rep 2022; 12:12976. [PMID: 35902670 PMCID: PMC9334579 DOI: 10.1038/s41598-022-17207-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 07/21/2022] [Indexed: 11/08/2022] Open
Abstract
Evidence from previous epidemiological studies on the effect of physical activity on the risk of Alzheimer's disease (AD) is conflicting. We performed a two-sample Mendelian randomization analysis to verify whether physical activity is causally associated with AD. This study used two-sample Mendelian randomization (MR) analysis to estimate the association between physical activity (including overall activity, sedentary behavior, walking, and moderate-intensity activity) and AD. Genetic instruments for physical activity were obtained from published genome-wide association studies (GWAS) including 91,105 individuals from UK Biobank. Summary-level GWAS data were extracted from the International Genomics of Alzheimer's Project IGAP (21,982 patients with AD and 41,944 controls). Inverse Variance Weighted (IVW) was used to estimate the effect of physical activity on AD. Sensitivity analyses including weighted median, MR-Egger, MR-PRESSO, and leave-one-out analysis were used to estimate pleiotropy and heterogeneity. Mendelian randomization evidences suggested a protective relationship between walking and AD (odds ratio (OR) = 0.30, 95% confidence interval (CI), 0.13-0.68, P = 0.0039). Genetically predicted overall activity, sedentary behavior, and moderate-intensity activity were not associated with AD. In summary, this study provided evidence that genetically predicted walking might associate with a reduced risk of AD. Further research into the causal association between physical activity and AD could help to explore the real relationship and provide more measures to reduce AD risk.
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24
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Palmer JA, Kaufman CS, Vidoni ED, Honea RA, Burns JM, Billinger SA. Cerebrovascular response to exercise interacts with individual genotype and amyloid-beta deposition to influence response inhibition with aging. Neurobiol Aging 2022; 114:15-26. [DOI: 10.1016/j.neurobiolaging.2022.02.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 02/23/2022] [Accepted: 02/24/2022] [Indexed: 12/23/2022]
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25
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Huuha AM, Norevik CS, Moreira JBN, Kobro-Flatmoen A, Scrimgeour N, Kivipelto M, Van Praag H, Ziaei M, Sando SB, Wisløff U, Tari AR. Can exercise training teach us how to treat Alzheimer's disease? Ageing Res Rev 2022; 75:101559. [PMID: 34999248 DOI: 10.1016/j.arr.2022.101559] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 12/20/2021] [Accepted: 01/04/2022] [Indexed: 01/02/2023]
Abstract
Alzheimer's disease (AD) is the most common cause of dementia and there is currently no cure. Novel approaches to treat AD and curb the rapidly increasing worldwide prevalence and costs of dementia are needed. Physical inactivity is a significant modifiable risk factor for AD, estimated to contribute to 12.7% of AD cases worldwide. Exercise interventions in humans and animals have shown beneficial effects of exercise on brain plasticity and cognitive functions. In animal studies, exercise also improved AD pathology. The mechanisms underlying these effects of exercise seem to be associated mainly with exercise performance or cardiorespiratory fitness. In addition, exercise-induced molecules of peripheral origin seem to play an important role. Since exercise affects the whole body, there likely is no single therapeutic target that could mimic all the benefits of exercise. However, systemic strategies may be a viable means to convey broad therapeutic effects in AD patients. Here, we review the potential of physical activity and exercise training in AD prevention and treatment, shining light on recently discovered underlying mechanisms and concluding with a view on future development of exercise-free treatment strategies for AD.
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Affiliation(s)
- Aleksi M Huuha
- Cardiac Exercise Research Group (CERG), Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway; Department of Neurology and Clinical Neurophysiology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Cecilie S Norevik
- Cardiac Exercise Research Group (CERG), Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway; Department of Neurology and Clinical Neurophysiology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - José Bianco N Moreira
- Cardiac Exercise Research Group (CERG), Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway
| | - Asgeir Kobro-Flatmoen
- Kavli Institute for Systems Neuroscience, Centre for Neural Computation, and Egil and Pauline Braathen and Fred Kavli Centre for Cortical Microcircuits, Norwegian University of Science and Technology, Trondheim, Norway; K.G. Jebsen Centre for Alzheimer's Disease, Norwegian University of Science and Technology, Trondheim, Norway
| | - Nathan Scrimgeour
- Cardiac Exercise Research Group (CERG), Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway
| | - Miia Kivipelto
- Karolinska Institute, Department of Neurobiology, Care Sciences and Society, Division of Clinical Geriatrics, Stockholm, Sweden; Karolinska University Hospital, Theme Aging and Inflammation, Stockholm, Sweden
| | - Henriette Van Praag
- Brain Institute and Charles E. Schmidt College of Medicine, Florida Atlantic University, Jupiter, FL, United States
| | - Maryam Ziaei
- Kavli Institute for Systems Neuroscience, Centre for Neural Computation, and Egil and Pauline Braathen and Fred Kavli Centre for Cortical Microcircuits, Norwegian University of Science and Technology, Trondheim, Norway; Queensland Brain Institute, University of Queensland, Brisbane, Australia
| | - Sigrid Botne Sando
- Department of Neurology and Clinical Neurophysiology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway; Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway
| | - Ulrik Wisløff
- Cardiac Exercise Research Group (CERG), Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway; Centre for Research on Exercise, Physical Activity and Health, School of Human Movement and Nutrition Sciences, University of Queensland, St. Lucia, Brisbane, Queensland, Australia
| | - Atefe R Tari
- Cardiac Exercise Research Group (CERG), Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway; Department of Neurology and Clinical Neurophysiology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway.
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26
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Devos H, Gustafson K, Liao K, Ahmadnezhad P, Estes B, Martin LE, Mahnken JD, Brooks WM, Burns JM. EEG/ERP evidence of possible hyperexcitability in older adults with elevated beta-amyloid. Transl Neurodegener 2022; 11:8. [PMID: 35139917 PMCID: PMC8827181 DOI: 10.1186/s40035-022-00282-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 01/12/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Although growing evidence links beta-amyloid (Aβ) and neuronal hyperexcitability in preclinical mouse models of Alzheimer's disease (AD), a similar association in humans is yet to be established. The first aim of the study was to determine the association between elevated Aβ (Aβ+) and cognitive processes measured by the P3 event-related potential (ERP) in cognitively normal (CN) older adults. The second aim was to compare the event-related power between CNAβ+ and CNAβ-. METHODS Seventeen CNAβ+ participants (age: 73 ± 5, 11 females, Montreal Cognitive Assessment [MoCA] score 26 ± 2) and 17 CNAβ- participants group-matched for age, sex, and MOCA completed a working memory task (n-back with n = 0, 1, 2) test while wearing a 256-channel electro-encephalography net. P3 peak amplitude and latency of the target, nontarget and task difference effect (nontarget-target), and event-related power in the delta, theta, alpha, and beta bands, extracted from Fz, Cz, and Pz, were compared between groups using linear mixed models. P3 amplitude of the task difference effect at Fz and event-related power in the delta band were considered main outcomes. Correlations of mean Aβ standard uptake value ratios (SUVR) using positron emission tomography with P3 amplitude and latency of the task difference effect were analyzed using Pearson Correlation Coefficient r. RESULTS The P3 peak amplitude of the task difference effect at Fz was lower in the CNAβ+ group (P = 0.048). Similarly, power was lower in the delta band for nontargets at Fz in the CNAβ+ participants (P = 0.04). The CNAβ+ participants also demonstrated higher theta and alpha power in channels at Cz and Pz, but no changes in P3 ERP. Strong correlations were found between the mean Aβ SUVR and the latency of the 1-back (r = - 0.69; P = 0.003) and 2-back (r = - 0.69; P = 0.004) of the task difference effect at channel Fz in the CNAβ+ group. CONCLUSIONS Our data suggest that the elevated amyloid in cognitively normal older adults is associated with neuronal hyperexcitability. The decreased P3 task difference likely reflects early impairments in working memory processes. Further research is warranted to determine the validity of ERP in predicting clinical, neurobiological, and functional manifestations of AD.
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Affiliation(s)
- Hannes Devos
- Department of Physical Therapy, Rehabilitation Science, and Athletic Training, University of Kansas Medical Center, Kansas City, KS, 66160, USA.
| | - Kathleen Gustafson
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS, 66160, USA
- Hoglund Biomedical Imaging Center, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | - Ke Liao
- Hoglund Biomedical Imaging Center, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | - Pedram Ahmadnezhad
- Department of Physical Therapy, Rehabilitation Science, and Athletic Training, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | - Bradley Estes
- Department of Physical Therapy, Rehabilitation Science, and Athletic Training, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | - Laura E Martin
- Hoglund Biomedical Imaging Center, University of Kansas Medical Center, Kansas City, KS, 66160, USA
- Department of Population Health, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | - Jonathan D Mahnken
- Department of Biostatistics and Data Science, University of Kansas Medical Center, Kansas City, KS, 66160, USA
- University of Kansas Alzheimer's Disease Center, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | - William M Brooks
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS, 66160, USA
- Hoglund Biomedical Imaging Center, University of Kansas Medical Center, Kansas City, KS, 66160, USA
- University of Kansas Alzheimer's Disease Center, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | - Jeffrey M Burns
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS, 66160, USA
- University of Kansas Alzheimer's Disease Center, University of Kansas Medical Center, Kansas City, KS, 66160, USA
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27
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Whitehead SN, Bruno A, Burns JM, Carmichael ST, Csiszar A, Edwards JD, Elahi FM, Faraco G, Gould DB, Gustafson DR, Hachinski V, Rosenberg G, Sorond FA, Shih AY, Tse KH, Ungvari Z, Wilcock DM, Zuloaga KL, Barone FC. Expanding the horizon of research into the pathogenesis of the white matter diseases: Proceedings of the 2021 Annual Workshop of the Albert Research Institute for White Matter and Cognition. GeroScience 2022; 44:25-37. [PMID: 34606040 PMCID: PMC8488071 DOI: 10.1007/s11357-021-00461-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 12/14/2022] Open
Abstract
White matter pathologies are critically involved in the etiology of vascular cognitive impairment-dementia (VCID), Alzheimer's disease (AD), and Alzheimer's disease and related diseases (ADRD), and therefore need to be considered a treatable target ( Roseborough A, Hachinski V, Whitehead S. White matter degeneration - a treatable target? Roseborough et al. JAMA Neurol [Internet]. 2020 Apr 27;77(7):793-4, [1] . To help address this often-missed area of research, several workshops have been sponsored by the Leo and Anne Albert Charitable Trust since 2015, resulting in the incorporation of "The Albert Research Institute for White Matter and Cognition" in 2020. The first annual "Institute" meeting was held virtually on March 3-4, 2021. The Institute provides a forum and workspace for communication and support of the advancement of white matter science and research to better understand the evolution and prevention of dementia. It serves as a platform for young investigator development, to introduce new data and debate biology mechanisms and new ideas, and to encourage and support new research collaborations and directions to clarify how white matter changes, with other genetic and health risk factors, contribute to cognitive impairment. Similar to previous Albert Trust-sponsored workshops (Barone et al. in J Transl Med 14:1-14, [2]; Sorond et al. in GeroScience 42:81-96, [3]), established expert investigators were identified and invited to present. Opportunities to attend and present were also extended by invitation to talented research fellows and younger scientists. Also, updates on institute-funded research collaborations were provided and discussed. The summary that follows is a synopsis of topics and discussion covered in the workshop.
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Affiliation(s)
- Shawn N Whitehead
- Department of Anatomy and Cell Biology, Western University, London, ON, N6A 3K7, Canada.
| | - Askiel Bruno
- Department of Neurology, Medical College of Georgia at Augusta University, Augusta, GA, 30912, USA
| | - Jeffrey M Burns
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS, USA
| | - S Thomas Carmichael
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA
| | - Anna Csiszar
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Jodi D Edwards
- University of Ottawa Heart Institute, Ottawa, Canada
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, K1G 5Z3, Canada
| | - Fanny M Elahi
- Memory and Aging Center, UCSF Weill Institute for Neurosciences, 675 Nelson Rising Lane, Suite 190, San Francisco, CA, 94158, USA
| | - Giuseppe Faraco
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY, 10065, USA
| | - Douglas B Gould
- Departments of Ophthalmology and Anatomy, and Institute for Human Genetics, School of Medicine, University of California, San Francisco, 94143, USA
| | - Deborah R Gustafson
- Department of Neurology, Section for NeuroEpidemiology, State University of New York Downstate Health Sciences University, New York, Brooklyn, 11203, USA
| | - Vladimir Hachinski
- Department of Clinical Neurological Sciences, Western University, London, ON, N6A 5C1, Canada
| | - Gary Rosenberg
- UNM Health Sciences Center, University of New Mexico, Albuquerque, NM, 87106, USA
| | | | - Andy Y Shih
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute; Department of Pediatrics; Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Kai Hei Tse
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Zoltan Ungvari
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Donna M Wilcock
- Sanders-Brown Center on Aging; Department of Neurology, Department of Behavioral Science, University of Kentucky, Lexington, KY, 40536, USA
| | - Kristen L Zuloaga
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, NY, 12208, USA
| | - Frank C Barone
- Department of Neurology, SUNY Downstate Health Sciences University, Brooklyn, NY, 11203, USA
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Honea RA, John CS, Green ZD, Kueck PJ, Taylor MK, Lepping RJ, Townley R, Vidoni ED, Burns JM, Morris JK. Relationship of fasting glucose and longitudinal Alzheimer's disease imaging markers. ALZHEIMER'S & DEMENTIA (NEW YORK, N. Y.) 2022; 8:e12239. [PMID: 35128029 PMCID: PMC8804928 DOI: 10.1002/trc2.12239] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 11/30/2021] [Accepted: 12/15/2021] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Fasting glucose increases with age and is linked to modifiable Alzheimer's disease risk factors such as cardiovascular disease and Type 2 diabetes (T2D). METHODS We leveraged available biospecimens and neuroimaging measures collected during the Alzheimer's Prevention Through Exercise (APEx) trial (n = 105) to examine the longitudinal relationship between change in blood glucose metabolism and change in regional cerebral amyloid deposition and gray and white matter (WM) neurodegeneration in older adults over 1 year of follow-up. RESULTS Individuals with improving fasting glucose (n = 61) exhibited less atrophy and regional amyloid accumulation compared to those whose fasting glucose worsened over 1 year (n = 44). Specifically, while individuals with increasing fasting glucose did not yet show cognitive decline, they did have regional atrophy in the hippocampus and inferior parietal cortex, and increased amyloid accumulation in the precuneus cortex. Signs of early dementia pathology occurred in the absence of significant group differences in insulin or body composition, and was not modified by apolipoprotein E ε4 carrier status. DISCUSSION Dysregulation of glucose in late life may signal preclinical brain change prior to clinically relevant cognitive decline. Additional work is needed to determine whether treatments specifically targeting fasting glucose levels may impact change in brain structure or cerebral amyloid in older adults.
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Affiliation(s)
- Robyn A. Honea
- University of Kansas Alzheimer's Disease Research CenterKansas CityKansasUSA
- Department of NeurologyUniversity of Kansas Medical CenterKansas CityKansasUSA
| | - Casey S. John
- University of Kansas Alzheimer's Disease Research CenterKansas CityKansasUSA
- Department of NeurologyUniversity of Kansas Medical CenterKansas CityKansasUSA
| | - Zachary D. Green
- University of Kansas Alzheimer's Disease Research CenterKansas CityKansasUSA
- Department of NeurologyUniversity of Kansas Medical CenterKansas CityKansasUSA
| | - Paul J. Kueck
- University of Kansas Alzheimer's Disease Research CenterKansas CityKansasUSA
- Department of NeurologyUniversity of Kansas Medical CenterKansas CityKansasUSA
| | - Matthew K. Taylor
- Department of Dietetics and NutritionUniversity of Kansas Medical CenterKansas CityKansasUSA
| | - Rebecca J. Lepping
- Hoglund Biomedical Imaging CenterUniversity of Kansas Medical CenterKansas CityKansasUSA
| | - Ryan Townley
- University of Kansas Alzheimer's Disease Research CenterKansas CityKansasUSA
- Department of NeurologyUniversity of Kansas Medical CenterKansas CityKansasUSA
| | - Eric D. Vidoni
- University of Kansas Alzheimer's Disease Research CenterKansas CityKansasUSA
- Department of NeurologyUniversity of Kansas Medical CenterKansas CityKansasUSA
| | - Jeffery M. Burns
- University of Kansas Alzheimer's Disease Research CenterKansas CityKansasUSA
- Department of NeurologyUniversity of Kansas Medical CenterKansas CityKansasUSA
| | - Jill K. Morris
- University of Kansas Alzheimer's Disease Research CenterKansas CityKansasUSA
- Department of NeurologyUniversity of Kansas Medical CenterKansas CityKansasUSA
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Fausto BA, Azimipour S, Charles L, Yarborough C, Grullon K, Hokett E, Duberstein PR, Gluck MA. Cardio-Dance Exercise to Improve Cognition and Mood in Older African Americans: A Propensity-Matched Cohort Study. J Appl Gerontol 2022; 41:496-505. [PMID: 33938312 PMCID: PMC8563498 DOI: 10.1177/07334648211010580] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The current study sought to determine the influence of initial sleep quality and body mass index on the cognitive and mood outcomes of a community-based cardio-dance exercise program. Thirty-two older African Americans who participated in a 5-month cardio-dance exercise program were propensity-matched to 32 no-contact controls. Participants completed neuropsychological tests of attention, executive function, and memory and a self-reported depression measure at baseline and post-test. Among exercise participants, we observed significant improvements in depression (baseline = 6.16 ± 5.54, post-test = 4.66 ± 4.89, η p 2 = . 12 , p = .009) and attention (baseline = 40.53 ± 14.01, post-test = 36.63 ± 13.29, η p 2 = . 12 , p = .009) relative to controls. Improvements in executive function and attention were most pronounced among exercise participants with poor sleep quality (baseline = 7.71 ± 1.25, post-test = 8.29 ± 2.06, η p 2 = . 41 , p = .04) and with obesity (baseline = 38.05 ± 12.78, post-test = 35.67 ± 13.82, η p 2 = . 30 , p = .001), respectively. This study provides novel evidence that exercise has the potential to improve depression in older African Americans. For those with poor sleep quality or obesity, exercise can also improve some cognitive outcomes.
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Sohn BK, Byun MS, Yi D, Jeon SY, Lee JH, Choe YM, Lee DW, Lee JY, Kim YK, Sohn CH, Lee DY. Late-Life Physical Activities Moderate the Relationship of Amyloid-β Pathology with Neurodegeneration in Individuals Without Dementia. J Alzheimers Dis 2022; 86:441-450. [PMID: 35068452 PMCID: PMC9210327 DOI: 10.3233/jad-215258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND Physical activities (PA) have been suggested to reduce the risk of Alzheimer's disease (AD) dementia. However, information on the neuropathological links underlying the relationship is limited. OBJECTIVE We investigated the role of midlife and late-life PA with in vivo AD neuropathologies in old adults without dementia. METHODS This study included participants from the Korean Brain Aging Study for Early Diagnosis and Prediction of Alzheimer's disease (KBASE). The participants underwent comprehensive clinical and neuropsychological assessment, [11C] Pittsburgh Compound B positron emission tomography (PET), [18F] fluorodeoxyglucose PET, and magnetic resonance imaging. Using the multi-modal brain imaging data, in vivo AD pathologies including global amyloid deposition, AD-signature region cerebral glucose metabolism (AD-CM), and AD-signature region cortical thickness (AD-CT) were quantified. Both midlife and late-life PA of participants were measured using the Lifetime Total Physical Activity Questionnaire. RESULTS This study was performed on 260 participants without dementia (195 with normal cognitive function and 65 with mild cognitive impairment). PA of neither midlife nor late-life showed direct correspondence with any neuroimaging biomarker. However, late-life PA moderated the relationship of brain amyloid-β (Aβ) deposition with AD-CM and AD-CT. Aβ positivity had a significant negative effect on both AD-CM and AD-CT in individuals with lower late-life PA, but those with higher late-life PA did not show such results. Midlife PA did not have such a moderation effect. CONCLUSION The findings suggest that physically active lifestyle in late-life, rather than that in midlife, may delay AD-associated cognitive decline by decreasing Aβ-induced neurodegenerative changes in old adults.
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Affiliation(s)
- Bo Kyung Sohn
- Department of Psychiatry, Inje University Sanggye Paik Hospital, Seoul, Republic of Korea
| | - Min Soo Byun
- Department of Psychiatry, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
| | - Dahyun Yi
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - So Yeon Jeon
- Department of Psychiatry, Chungnam National University Hospital, Daejeon, Republic of Korea
| | - Jun Ho Lee
- Department of Neuropsychiatry, National Center for Mental Health, Seoul, Republic of Korea
| | - Young Min Choe
- Department of Neuropsychiatry, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea
| | - Dong Woo Lee
- Department of Psychiatry, Inje University Sanggye Paik Hospital, Seoul, Republic of Korea
| | - Jun-Young Lee
- Department of Neuropsychiatry, SMG-SNU Boramae Medical Center, Seoul, Republic of Korea,Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Yu Kyeong Kim
- Department of Nuclear Medicine, SMG-SNU Boramae Medical Center, Seoul, Republic of Korea
| | - Chul-Ho Sohn
- Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea
| | - Dong Young Lee
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea,Department of Neuropsychiatry, Seoul National University Hospital, Seoul, Republic of Korea,Institute of Human Behavioral Medicine, Medical Research Center Seoul National University, Seoul, Republic of Korea,Correspondence to: Dong Young Lee, Department of Neuropsychiatry, Seoul National University Hospital & Department of Psychiatry and Behavioral Science, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul 03080, Republic of Korea. Tel.: +82 2 2072 2205; Fax: +82 2 744 7241;
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31
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Palmer JA, Kaufman CS, Vidoni ED, Honea RA, Burns JM, Billinger SA. Sex Differences in Resilience and Resistance to Brain Pathology and Dysfunction Moderated by Cerebrovascular Response to Exercise and Genetic Risk for Alzheimer's Disease. J Alzheimers Dis 2022; 90:535-542. [PMID: 36155505 PMCID: PMC9731318 DOI: 10.3233/jad-220359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Sex as a biological variable appears to contribute to the multifactorial etiology of Alzheimer's disease. We tested sex-based interactions between cerebrovascular function and APOE4 genotype on resistance and resilience to brain pathology and cognitive executive dysfunction in cognitively-normal older adults. Female APOE4 carriers had higher amyloid-β deposition yet achieved similar cognitive performance to males and female noncarriers. Further, female APOE4 carriers with robust cerebrovascular responses to exercise possessed lower amyloid-β. These results suggest a unique cognitive resilience and identify cerebrovascular function as a key mechanism for resistance to age-related brain pathology in females with high genetic vulnerability to Alzheimer's disease.
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Affiliation(s)
- Jacqueline A. Palmer
- Department of Neurology, School of Medicine, University of Kansas Medical Center, Kansas City, KS, United States of America,University of Kansas Alzheimer’s Disease Research Center, Fairway, KS, United States of America
| | - Carolyn S. Kaufman
- Department of Molecular & Integrative Physiology, University of Kansas Medical Center, Kansas City, KS, USA
| | - Eric D. Vidoni
- University of Kansas Alzheimer’s Disease Research Center, Fairway, KS, United States of America
| | - Robyn A. Honea
- University of Kansas Alzheimer’s Disease Research Center, Fairway, KS, United States of America
| | - Jeffrey M. Burns
- University of Kansas Alzheimer’s Disease Research Center, Fairway, KS, United States of America
| | - Sandra A. Billinger
- Department of Neurology, School of Medicine, University of Kansas Medical Center, Kansas City, KS, United States of America,University of Kansas Alzheimer’s Disease Research Center, Fairway, KS, United States of America,Department of Molecular & Integrative Physiology, University of Kansas Medical Center, Kansas City, KS, USA,Correspondence: Sandra A. Billinger, PT, PhD, FAHA, , Twitter: @Sandy_REACHlab
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32
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Liu W, Zhang J, Wang Y, Li J, Chang J, Jia Q. Effect of Physical Exercise on Cognitive Function of Alzheimer's Disease Patients: A Systematic Review and Meta-Analysis of Randomized Controlled Trial. Front Psychiatry 2022; 13:927128. [PMID: 35782450 PMCID: PMC9243422 DOI: 10.3389/fpsyt.2022.927128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 05/19/2022] [Indexed: 12/31/2022] Open
Abstract
This review aims to systematically review the effects of physical exercise on the cognitive performance of patients with Alzheimer's disease (AD) and its mechanisms of action. Databases such as Web of Science, PubMed, EMBASE, and the Cochrane Central Register of Controlled Trials were searched until December 2021. A randomized controlled trial (RCT) to assess the effect of an exercise intervention (compared with no exercise) on patients with AD. The measures included cognitive function [Mini-Mental State Examination (MMSE), Alzheimer's Disease assessment scale-cognitive (ADAS-Cog), Montreal cognitive assessment scale (MoCA) and Executive Function (EF)]. The methodological quality of the included literature was assessed using the Physiotherapy Evidence Database (PEDro) scale. Twenty-two studies (n = 1647, mean age: 77.1 ± 6.3 years) were included in the systematic review, sixteen of which were included in the meta-analysis. A systematic review and meta-analysis revealed that physical exercise positively affects cognitive performance in older patients with AD. However, the positive effects of the intervention should be interpreted with caution considering the differences in methodological quality, type, frequency, and duration of exercise in the included studies. Future studies should consider the design rigor and specification of RCT protocols.
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Affiliation(s)
- Wei Liu
- School of Physical Education, Xuzhou Kindergarten Teachers College, Xuzhou, China.,Institute of Motor Quotient, Southwest University, Chongqing, China
| | - Jia Zhang
- Qingdao Mental Health Center, Qingdao University, Qingdao, China
| | - Yanyan Wang
- Qingdao Mental Health Center, Qingdao University, Qingdao, China
| | - Junfeng Li
- Ministry of Sports, Shandong Technology and Business University, Yantai, China
| | - Jindong Chang
- Institute of Motor Quotient, Southwest University, Chongqing, China
| | - Qingyin Jia
- Financial Department, Shandong Sports University, Jinan, China
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33
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Fraser MA, Walsh EI, Shaw ME, Anstey KJ, Cherbuin N. Longitudinal Effects of Physical Activity Change on Hippocampal Volumes over up to 12 Years in Middle and Older Age Community-Dwelling Individuals. Cereb Cortex 2021; 32:2705-2716. [PMID: 34671805 DOI: 10.1093/cercor/bhab375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 09/11/2021] [Accepted: 09/12/2021] [Indexed: 12/17/2022] Open
Abstract
The objectives of this study were to investigate the long-term associations between changes in physical activity levels and hippocampal volumes over time, while considering the influence of age, sex, and APOE-ε4 genotype. We investigated the effects of change in physical activity on hippocampal volumes in 411 middle age (mean age = 47.2 years) and 375 older age (mean age = 63.1 years) adults followed up to 12 years. An annual volume decrease was observed in the left (middle age: 0.46%; older age: 0.51%) but not in the right hippocampus. Each additional 10 metabolic equivalents (METs, ~2 h of moderate exercise) increase in weekly physical activity was associated with 0.33% larger hippocampal volume in middle age (equivalent to ~1 year of typical aging). In older age, each additional MET was associated with 0.05% larger hippocampal volume; however, the effects declined with time by 0.005% per year. For older age APOE-ε4 carriers, each additional MET was associated with a 0.10% increase in hippocampal volume. No sex effects of physical activity change were found. Increasing physical activity has long-term positive effects on hippocampal volumes and appears especially beneficial for older APOE-ε4 carriers. To optimize healthy brain aging, physical activity programs should focus on creating long-term exercise habits.
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Affiliation(s)
- Mark A Fraser
- Centre for Research on Ageing, Health and Wellbeing, Research School of Population Health, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Erin I Walsh
- Centre for Research on Ageing, Health and Wellbeing, Research School of Population Health, Australian National University, Canberra, Australian Capital Territory 2601, Australia.,Population Health Exchange, Research School of Population Health, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Marnie E Shaw
- ANU College of Engineering & Computer Science, Australian National University, Canberra, Australian Capital Territory 2600, Australia
| | - Kaarin J Anstey
- Centre for Research on Ageing, Health and Wellbeing, Research School of Population Health, Australian National University, Canberra, Australian Capital Territory 2601, Australia.,Ageing Futures Institute, University of New South Wales, Sydney, New South Wales 2052, Australia.,Neuroscience Research Australia, Sydney, New South Wales 2031, Australia
| | - Nicolas Cherbuin
- Centre for Research on Ageing, Health and Wellbeing, Research School of Population Health, Australian National University, Canberra, Australian Capital Territory 2601, Australia
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34
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Taylor MK, Sullivan DK, Morris JK, Vidoni ED, Honea RA, Mahnken JD, Burns JM. High Glycemic Diet Is Related to Brain Amyloid Accumulation Over One Year in Preclinical Alzheimer's Disease. Front Nutr 2021; 8:741534. [PMID: 34646853 PMCID: PMC8502814 DOI: 10.3389/fnut.2021.741534] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 08/31/2021] [Indexed: 12/23/2022] Open
Abstract
Objective: To test the hypothesis that high glycemic diet is related to 1-year change in brain amyloid based on our prior cross-sectional evidence that high glycemic diet is associated with brain amyloid. Methods: This longitudinal, observational study assessed the relationship between reported habitual consumption of a high glycemic diet (HGDiet) pattern and 1-year brain amyloid change measured by Florbetapir F18 PET scans in 102 cognitively normal older adults with elevated or sub-threshold amyloid status that participated in a 1-year randomized, controlled exercise trial at the University of Kansas Medical Center in Kansas City. Results: Among all participants (n = 102), higher daily intake of the HGDiet pattern (β = 0.06, p = 0.04), sugar (β = 0.07, p = 0.01), and total carbohydrate (β = 0.06, p = 0.04) were related to more precuneal amyloid accumulation. These relationships in the precuneus were accentuated in participants with elevated amyloid at enrollment (n = 70) where higher intake of the HGDiet pattern, sugar, and carbohydrate were related to more precuneal amyloid accumulation (β = 0.11, p = 0.01 for all measures). In individuals with elevated amyloid, higher intake of the HGDiet pattern was also related to more amyloid accumulation in the lateral temporal lobe (β = 0.09, p < 0.05) and posterior cingulate gyrus (β = 0.09, p < 0.05) and higher sugar and carbohydrate intake were also related to more amyloid accumulation in the posterior cingulate gyrus (β = 0.10, p < 0.05 for both measures). Conclusion: This longitudinal observational analysis suggests that a high glycemic diet relates to higher brain amyloid accumulation over 1 year in regions of the temporoparietal cortex in cognitively normal adults, particularly in those with elevated amyloid status. Further studies are required to assess whether there is causal link between a high glycemic diet and brain amyloid. Clinical Trial Registration:ClinicalTrials.gov, Identifier (NCT02000583).
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Affiliation(s)
- Matthew K Taylor
- Department of Dietetics and Nutrition, University of Kansas Medical Center, Kansas, KS, United States.,University of Kansas Alzheimer's Disease Center, Fairway, KS, United States
| | - Debra K Sullivan
- Department of Dietetics and Nutrition, University of Kansas Medical Center, Kansas, KS, United States.,University of Kansas Alzheimer's Disease Center, Fairway, KS, United States
| | - Jill K Morris
- University of Kansas Alzheimer's Disease Center, Fairway, KS, United States.,Department of Neurology, University of Kansas Medical Center, Kansas, KS, United States
| | - Eric D Vidoni
- University of Kansas Alzheimer's Disease Center, Fairway, KS, United States.,Department of Neurology, University of Kansas Medical Center, Kansas, KS, United States
| | - Robyn A Honea
- University of Kansas Alzheimer's Disease Center, Fairway, KS, United States.,Department of Neurology, University of Kansas Medical Center, Kansas, KS, United States
| | - Jonathan D Mahnken
- University of Kansas Alzheimer's Disease Center, Fairway, KS, United States.,Department of Biostatistics, University of Kansas Medical Center, Kansas, KS, United States
| | - Jeffrey M Burns
- University of Kansas Alzheimer's Disease Center, Fairway, KS, United States.,Department of Neurology, University of Kansas Medical Center, Kansas, KS, United States
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35
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Alzheimer's disease clinical trial update 2019-2021. J Neurol 2021; 269:1038-1051. [PMID: 34609602 DOI: 10.1007/s00415-021-10790-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 08/31/2021] [Accepted: 09/01/2021] [Indexed: 12/12/2022]
Abstract
The current clinical trial landscape targeting Alzheimer's disease (AD) is reviewed in the context of studies completed from 2019 to 2021. This review focuses on available data for observational and phase II/III clinical trial results, which will have the most impact on the field. ClinicalTrials.gov, the United States (US) comprehensive federal registry, was queried to identify completed trials. There are currently 226 interventional clinical trials and 51 observational studies completed, suspended, terminated, or withdrawn within our selected time frame. This review reveals that the role of biomarkers is expanding and although many lessons have been learned, many challenges remain when targeting disease modification of AD through amyloid and tau. In addition, to halt or slow clinical progression of AD, new clinical and observational trials are focusing on prevention as well as the role of more diverse biological processes known to influence AD pathology.
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36
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Dougherty RJ, Ramachandran J, Liu F, An Y, Wanigatunga AA, Tian Q, Bilgel M, Simonsick EM, Ferrucci L, Resnick SM, Schrack JA. Association of walking energetics with amyloid beta status: Findings from the Baltimore Longitudinal Study of Aging. ALZHEIMER'S & DEMENTIA (AMSTERDAM, NETHERLANDS) 2021; 13:e12228. [PMID: 34458552 PMCID: PMC8377776 DOI: 10.1002/dad2.12228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/29/2021] [Accepted: 07/01/2021] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Higher energetic costs for mobility predict gait speed decline. Slow gait is linked to cognitive decline and Alzheimer's disease (AD). Whether the energetic cost of walking is linked to AD pathology is unknown. We investigated the cross-sectional association between the energetic cost of walking, gait speed, and amyloid beta (Aβ) status (+/-) in older adults. METHODS One hundred forty-nine cognitively normal adults (56% women, mean age 77.5 ± 8.4 years) completed customary-paced walking assessments with indirect calorimetry and 11C-Pittsburgh compound B positron emission tomography. Logistic regression models examined associations adjusted for demographics, body composition, comorbid conditions, and apolipoprotein E ε4. RESULTS Each 0.01 mL/kg/m greater energy cost was associated with 18% higher odds of being Aβ+ (odds ratio [OR] = 1.18; 95% confidence interval [CI]: 1.04 to 1.34; P = .011). These findings were not observed when investigating gait speed (OR = 0.99; 95% CI: 0.97 to 1.01; P = .321). DISCUSSION High energetic cost of walking is linked to AD pathology and may be a potential target for therapeutic intervention.
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Affiliation(s)
- Ryan J. Dougherty
- Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMarylandUSA
| | - Janani Ramachandran
- Departments of Epidemiology and BiostatisticsBoston University School of Public HealthBostonMassachusettsUSA
| | - Fangyu Liu
- Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMarylandUSA
| | - Yang An
- Intramural Research Program, National Institute on AgingBaltimoreMarylandUSA
| | - Amal A. Wanigatunga
- Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMarylandUSA
- Center on Aging and HealthJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Qu Tian
- Intramural Research Program, National Institute on AgingBaltimoreMarylandUSA
| | - Murat Bilgel
- Intramural Research Program, National Institute on AgingBaltimoreMarylandUSA
| | | | - Luigi Ferrucci
- Intramural Research Program, National Institute on AgingBaltimoreMarylandUSA
| | - Susan M. Resnick
- Intramural Research Program, National Institute on AgingBaltimoreMarylandUSA
| | - Jennifer A. Schrack
- Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMarylandUSA
- Intramural Research Program, National Institute on AgingBaltimoreMarylandUSA
- Center on Aging and HealthJohns Hopkins UniversityBaltimoreMarylandUSA
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37
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Kaufman CS, Honea RA, Pleen J, Lepping RJ, Watts A, Morris JK, Billinger SA, Burns JM, Vidoni ED. Aerobic exercise improves hippocampal blood flow for hypertensive Apolipoprotein E4 carriers. J Cereb Blood Flow Metab 2021; 41:2026-2037. [PMID: 33509035 PMCID: PMC8327103 DOI: 10.1177/0271678x21990342] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Cerebrovascular dysfunction likely contributes causally to Alzheimer's disease (AD). The strongest genetic risk factor for late-onset AD, Apolipoprotein E4 (APOE4), may act synergistically with vascular risk to cause dementia. Therefore, interventions that improve vascular health, such as exercise, may be particularly beneficial for APOE4 carriers. We assigned cognitively normal adults (65-87 years) to an aerobic exercise intervention or education only. Arterial spin labeling MRI measured hippocampal blood flow (HBF) before and after the 52-week intervention. We selected participants with hypertension at enrollment (n = 44). For APOE4 carriers, change in HBF (ΔHBF) was significantly (p = 0.006) higher for participants in the exercise intervention (4.09 mL/100g/min) than the control group (-2.08 mL/100g/min). There was no difference in ΔHBF between the control (-0.32 mL/100g/min) and exercise (-0.54 mL/100g/min) groups for non-carriers (p = 0.918). Additionally, a multiple regression showed an interaction between change in systolic blood pressure (ΔSBP) and APOE4 carrier status on ΔHBF (p = 0.035), with reductions in SBP increasing HBF for APOE4 carriers only. Aerobic exercise improved HBF for hypertensive APOE4 carriers only. Additionally, only APOE4 carriers exhibited an inverse relationship between ΔSBP and ΔHBF. This suggests exercise interventions, particularly those that lower SBP, may be beneficial for individuals at highest genetic risk of AD.ClinicalTrials.gov Identifier: NCT02000583.
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Affiliation(s)
- Carolyn S Kaufman
- Department of Molecular & Integrative Physiology, University of Kansas Medical Center, Kansas City, KS, USA
| | - Robyn A Honea
- University of Kansas Alzheimer’s Disease Center, Fairway, KS, USA
| | - Joseph Pleen
- University of Kansas Alzheimer’s Disease Center, Fairway, KS, USA
| | - Rebecca J Lepping
- Hoglund Biomedical Imaging Center, University of Kansas Medical Center, Kansas City, KS, USA
| | - Amber Watts
- Department of Psychology, University of Kansas, Lawrence, KS, USA
| | - Jill K Morris
- University of Kansas Alzheimer’s Disease Center, Fairway, KS, USA
| | - Sandra A Billinger
- Department of Molecular & Integrative Physiology, University of Kansas Medical Center, Kansas City, KS, USA
- Department of Physical Therapy and Rehabilitation Science, University of Kansas Medical Center, Kansas City, KS, USA
| | - Jeffrey M Burns
- University of Kansas Alzheimer’s Disease Center, Fairway, KS, USA
| | - Eric D Vidoni
- University of Kansas Alzheimer’s Disease Center, Fairway, KS, USA
- Eric D Vidoni, KU Alzheimer's Disease Center, KU Clinical Research Center, 4350 Shawnee Mission Parkway, MS 6002, Fairway, KS 66205, USA.
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Rationale and methods to characterize the acute exercise response in aging and Alzheimer's Disease: the AEROBIC pilot study. Contemp Clin Trials 2021; 107:106457. [PMID: 34051350 DOI: 10.1016/j.cct.2021.106457] [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: 03/11/2021] [Revised: 05/21/2021] [Accepted: 05/24/2021] [Indexed: 11/20/2022]
Abstract
There is evidence that exercise benefits the brain, but the mechanisms for this benefit are unclear. The chronic benefits of exercise are likely a product of discreet, acute responses in exercise-related blood biomarkers and brain metabolism. This acute exercise response has not been compared in aging and Alzheimer's Disease (AD). It is known that acute exercise elicits a powerful peripheral response in young individuals, and exercise-related biomarkers such as glucose and lactate readily penetrate the brain. How this changes with aging and neurodegenerative disease is less clear. It is critical to characterize and understand the acute effects of exercise, including different exercise intensities, in terms of the peripheral metabolic response and relationship with brain metabolism. This will help determine potential mechanisms for brain benefits of exercise and better inform the design of future clinical trials. The primary goal of the AEROBIC study is to characterize the acute exercise response of brain glucose metabolism and exercise-related blood biomarkers. We will measure how cerebral metabolism is affected by an acute bout of moderate and higher intensity exercise and characterize the extent to which this differs between cognitively healthy older adults and individuals with AD. Related to this primary goal, we will quantify the peripheral biomarker response to moderate and higher intensity exercise and how this relates to brain metabolic change in both groups.
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