Date: 2016
Type: Article
Relationships of peripheral IGF-1, VEGF and BDNF levels to exercise-related changes in memory, hippocampal perfusion and volumes in older adults
Neuroimage, 2016, Vol. 131, pp. 142-154
MAASS, Anne, DUEZEL, Sandra, BRIGADSKI, Tanja, GOERKE, Monique, BECKE, Andreas, SOBIERAY, Uwe, NEUMANN, Katja, LOVDEN, Martin, LINDENBERGER, Ulman, BACKMAN, Lars, BRAUN-DULLAEUS, Ruediger, AHRENS, Doerte, HEINZE, Hans-Jochen, MUELLER, Notger G., LESSMANN, Volkmar, SENDTNER, Michael, DUEZEL, Emrah, Relationships of peripheral IGF-1, VEGF and BDNF levels to exercise-related changes in memory, hippocampal perfusion and volumes in older adults, Neuroimage, 2016, Vol. 131, pp. 142-154
- https://hdl.handle.net/1814/61443
Retrieved from Cadmus, EUI Research Repository
Animal models point towards a key role of brain-derived neurotrophic factor (BDNF), insulin-like growth factor-I (IGF-I) and vascular endothelial growth factor (VEGF) in mediating exercise-induced structural and functional changes in the hippocampus. Recently, also platelet derived growth factor-C (PDGF-C) has been shown to promote blood vessel growth and neuronal survival. Moreover, reductions of these neurotrophic and angiogenic factors in old age have been related to hippocampal atrophy, decreased vascularization and cognitive decline. In a 3-month aerobic exercise study, forty healthy older humans (60 to 77 years) were pseudo-randomly assigned to either an aerobic exercise group (indoor treadmill, n=21) or to a control group (indoor progressive-muscle relaxation/stretching, n=19). As reported recently, we found evidence for fitness-related perfusion changes of the aged human hippocampus that were closely linked to changes in episodic memory function. Here, we test whether peripheral levels of BDNF, IGF-I, VEGF or PDGF-C are related to changes in hippocampal blood flow, volume and memory performance. Growth factor levels were not significantly affected by exercise, and their changes were not related to changes in fitness or perfusion. However, changes in IGF-I levels were positively correlated with hippocampal volume changes (derived by manual volumetry and voxel-based morphometry) and late verbal recall performance, a relationship that seemed to be independent of fitness, perfusion or their changes over time. These preliminary findings link IGF-I levels to hippocampal volume changes and putatively hippocampus-dependent memory changes that seem to occur over time independently of exercise. We discuss methodological shortcomings of our study and potential differences in the temporal dynamics of how IGF-1, VEGF and BDNF may be affected by exercise and to what extent these differences may have led to the negative findings reported here. (C) 2015 The Authors. Published by Elsevier Inc.
Additional information:
Published: May 2016
Cadmus permanent link: https://hdl.handle.net/1814/61443
Full-text via DOI: 10.1016/j.neuroimage.2015.10.084
ISSN: 1053-8119; 1095-9572
Publisher: Elsevier
Keyword(s): Exercise Neurotrophic factors Hippocampus Vascular plasticity Aging Growth-factor-I Neurotrophic factor Physical-exercise Val66met polymorphism Voluntary exercise Brain plasticity Alpha-receptor Pdgf-Cc Neurogenesis Increases
Sponsorship and Funder information:
German Center for Neurodegenerative Diseases Otto-von-Guericke University (IKND) Swedish Research Council Formas Swedish Research Council for Health, Working Life, and Welfare Swedish Brain Power, an Alexander von Humboldt Research Award
Files associated with this item
- Name:
- Relationships_of_peripheral_IG ...
- Size:
- 1.009Mb
- Format:
- Description:
- Full-text in Open Access