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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Acute exercise increases circulating IGF-1 in Alzheimer's disease patients, but not in older adults without dementia

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Stein, Angelica Miki [1, 2] ; Vital da Silva, Thays Martins [1, 3] ; de Melo Coelho, Flavia Gomes [1, 4] ; Rueda, Andre Veloso [5] ; Camarini, Rosana [5] ; Santos Galduroz, Ruth Ferreira [1, 6]
Total Authors: 6
[1] Univ Estadual Paulista UNESP, Inst Biociencias, Campus Rio Claro, Rio Claro, SP - Brazil
[2] Fed Univ Technol Parana UTFPR, UTFPR, Campus Curitiba, Curitiba, Parana - Brazil
[3] Inst Fed Goiano, Campus Avancado Hidrolandia, Hidrolandia, Go - Brazil
[4] Univ Fed Triangulo Mineiro, Postgrad Program Phys Educ, Uberaba - Brazil
[5] Univ Sao Paulo, Inst Ciencias Biomed, Dept Farmacol, Campus Sao Paulo, Sao Paulo, SP - Brazil
[6] Univ Fed ABC UFABC, Ctr Math Comp & Cognit, Campus Sao Bernardo, Sao Bernardo Do Campo, SP - Brazil
Total Affiliations: 6
Document type: Journal article
Source: Behavioural Brain Research; v. 396, JAN 1 2021.
Web of Science Citations: 0

Objectives: Increased Insulin-like growth factor I (IGF-1) has been associated with improvement of cognitive function in response to exercise. Evidences indicate a role for IGF-1 in beta-amyloid clearance and reducing hyperphosphorylation tau in Alzheimer's disease (AD). There is a need to investigate the IGF-1 response to exercise in AD patients due to well-known potential effects of exercise on IGF-1. The aim of this study was to examine circulating IGF-1 levels in AD patients and older adults without dementia after acute exercise and to verify the associations among cardiorespiratory fitness, cognition and IGF-1 levels. Method: Seventy-four older adults (40 older adults without dementia and 34 AD patients) participated in this study. The outcomes included IGF-1 plasma levels and performance in the submaximal exercise stress test. Secondary outcomes included cognitive functions, depressive symptoms, level of physical activity, insulin-resistance, and cholesterol. All participants performed the incremental test on a treadmill and IGF-1 was collected before and after the exercise. Results: A tendency to the difference of baseline IGF-1 plasma levels between the groups was found. After the acute exercise AD patients also presented higher levels of circulating IGF-1 compared to the Older adults without dementia. Correlations among cardiorespiratory fitness and cognitive functions were found. Conclusion: The findings suggest that AD patients and older adults respond differently to acute exercise in terms of circulating IGF-1 levels. This response seems to indicate either an IGF-1 resistance or a compensatory exerciseinduced to lower IGF-1 levels in AD patients. Cardiorespiratory fitness is associated with global cognition, executive function, attention and information processing speed. (AU)

FAPESP's process: 13/19729-0 - Effect of aerobic training in levels of insulin-like growth factor-1 and cognitive functions in Alzheimer's Disease
Grantee:Angelica Miki Stein
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)