Prophylactic activation of neuroprotective stress response pathways by dietary and behavioral manipulations.
It is well established that when most types of cells, including neurons, are exposed to a mild stress they increase their ability to resist more severe stress. This "preconditioning" phenomenon involves up-regulation of genes that encode cytoprotective proteins such as heat-shock proteins and growth factors. We found that a similar beneficial cellular stress response can be induced in neurons throughout the brain by a "meal-skipping" dietary restriction (DR) regimen in rats and mice. DR is effective in protecting neurons and improving functional outcome in models of stroke, Alzheimer's, Parkinson's and Huntington's diseases. DR induces an increase in the levels of brain-derived neurotrophic factor (BDNF) and heat-shock proteins in neurons. DR also stimulates neurogenesis in the hippocampus, and BDNF plays a role in this effect of DR. Physical exercise and environmental enrichment are two other manipulations that have been shown to induce BDNF expression in the brain, presumably because it is a mild cellular stress. When taken together with epidemiological and clinical studies in humans, the data from animal studies suggest that it may be possible to reduce the risk for age-related neurodegenerative disorders through dietary and behavioral modifications that act by promoting neuronal plasticity and survival.
Mattson
Mark P
MP
Laboratory of Neurosciences, National Institute on Aging Gerontology Research Center, Baltimore, Maryland 21224, USA. mattsonm@grc.nia.nih.gov
Duan
Wenzhen
W
Wan
Ruqian
R
Guo
Zhihong
Z
D000544:Alzheimer Disease / Q000517:prevention & control; D000818:Animals; D032763:Behavior Control / Q000379:methods; D001921:Brain / Q000473:pathology / Q000502:physiology*; D019208:Brain-Derived Neurotrophic Factor / Q000378:metabolism; D031204:Caloric Restriction; D002493:Central Nervous System Diseases / Q000517:prevention & control*; D015444:Exercise / Q000502:physiology; D006801:Humans; D006816:Huntington Disease / Q000517:prevention & control; D010300:Parkinson Disease / Q000517:prevention & control; D012931:Social Environment; D020521:Stroke / Q000517:prevention & control
D019208:Brain-Derived Neurotrophic Factor
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