期刊
REDOX BIOLOGY
卷 2, 期 -, 页码 873-877出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.redox.2014.03.002
关键词
Vitamin E; Antioxidant; Beta-amyloid; P-p38
资金
- Spanish Ministry of Education and Science (MEC) [SAF2010-19498]
- Red Tematica de investigacion cooperativa en envejecimiento y fragilidad (RETICEF) [ISCIII2006-RED13-027, ISCIII2012-RED-43-029]
- Conselleria d'Educacio, Cultura i Esport de la Generalitat Valenciana [PROMETEO2010/074]
- 35NEURO GentxGent from Fundacio Gent Per Gent de la Comunitat Valenciana
- Intramural Grant from INCLIVA [RS2012-609]
- EU [CM 1001, FRAILOMIC-HEALTH.2012.2.1.1-2]
- FEDER funds from the European Union
- Sara Borrel grant
Oxidative stress is a hallmark of Alzheimer's disease (AD). We propose that rather than causing damage because of the action of free radicals, oxidative stress deranges signaling pathways leading to tau hyperphosphorylation, a hallmark of the disease. Indeed, incubation of neurons in culture with 5 mu M beta-amyloid peptide (A beta) causes an activation of p38 MAPK (p38) that leads to tau hyperphosphorylation. Inhibition of p38 prevents A beta-induced tau phosphorylation. A beta-induced effects are prevented when neurons are co-incubated with trolox (the water-soluble analog of vitamin E). We have confirmed these results in vivo, in APP/PS1 double transgenic mice of AD. We have found that APP/PSI transgenic mice exhibit a high level of P-p38 in the hippocampus but not in cortex and this is prevented by feeding animals with a diet supplemented with vitamin E. Our results underpin the role of oxidative stress in the altered cell signaling in AD pathology and suggest that antioxidant prevention may be useful in AD therapeutics. (C) 2014 The Authors. Published by Elsevier B.V.
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