Abstract:
:Recently an aspartyl protease with beta-secretase activity called BACE was identified. In the present paper we showed that BACE is modulated by the oxidative stress product 4-hydroxynonenal (HNE). Exposure of NT(2) neurons to the two classical pro-oxidant stimuli ascorbate/FeSO(4) and H(2)O(2)/FeSO(4) resulted in a significant generation of HNE, which is temporally followed by an increased production of BACE protein levels. HNE mediated BACE induction is accompanied by a proportional elevation of carboxy-terminal fragments of amyloid precursor protein. Moreover, the direct relationship between BACE induction and lipid peroxidation products was strongly confirmed by the protection exerted by a short pretreatment with alpha-tocopherol, the most important antioxidant known to prevent the formation of aldehydic end-products of lipid peroxidation, including HNE. Our results support the hypothesis that oxidative stress and A beta production are strictly interrelated events and suggest that inhibition of BACE may have a therapeutic effect synergic with antioxidant compounds.
journal_name
Neurobiol Disjournal_title
Neurobiology of diseaseauthors
Tamagno E,Bardini P,Obbili A,Vitali A,Borghi R,Zaccheo D,Pronzato MA,Danni O,Smith MA,Perry G,Tabaton Mdoi
10.1006/nbdi.2002.0515keywords:
subject
Has Abstractpub_date
2002-08-01 00:00:00pages
279-88issue
3eissn
0969-9961issn
1095-953Xpii
S0969996102905152journal_volume
10pub_type
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