Argüelles S, Machado A, Ayala A. 'In vitro' protective effect of a hydrophilic vitamin E analogue on the decrease in levels of elongation factor 2 in conditions of oxidative stress.
Gerontology 2007;
53:282-8. [PMID:
17510559 DOI:
10.1159/000102948]
[Citation(s) in RCA: 186] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2007] [Accepted: 02/20/2007] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND
Protein synthesis is inhibited by oxidative stress. Among the possible causes of this inhibition are the modifications of elongation factor 2 (eEF-2), the protein that catalyzes the translocation of the ribosome through mRNA. eEF-2 is extremely sensitive to oxidative stress caused mainly by lipid peroxidant compounds such as cumene hydroperoxide (CH).
OBJECTIVE
The purpose of this study was to determine whether the antioxidant Trolox prevents the effect of CH on the levels of hepatic eEF-2.
METHODS
The effect was determined in liver homogenates treated with both compounds. Lipid peroxides and carbonyl content were also measured.
RESULTS
The results show that Trolox at certain doses prevents the decrease in the level of eEF-2 caused by CH.
CONCLUSION
Under oxidative stress circumstances, vitamin E can prevent the effect of oxidations on relevant biological processes such as protein synthesis.
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