期刊
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
卷 319, 期 3, 页码 1047-1052出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2004.05.082
关键词
alpha-tocopherol; gamma-tocopherol; carboxyethylhydroxychroman; microglia; endothelial; inflammation
资金
- NCI NIH HHS [R01-CA82506] Funding Source: Medline
- NIA NIH HHS [R01-AG02059, R01-AG15964, R03-AG20783, R43-AG023519] Funding Source: Medline
Our objective was to assess the anti-inflammatory effects of alpha-tocopherol, gamma-tocopherol, and their metabolites 2,5,7,8-tetramethyl-2-(beta-carboxyethyl)-6-hydroxychroman (alpha-CEHC) and 2,7,8-trimethyl-2-(beta-carboxyethyl)-6-hydroxychroman (gamma-CEHC) in defined cell culture systems. Rat aortic endothelial cells and mouse microglial cultures were treated with tumor necrosis factor TNFalpha or bacterial lipopolysaccharide (LPS) and nitrite and prostaglandin E-2 (PGE(2)) were measured. alpha-CEHC suppressed TNFalpha-stimulated nitrite production in both cell types, whereas both CEHC derivatives inhibited LPS-stimulated microglial nitrite efflux. Both alpha-CEHC and gamma-CEHC inhibited microglial PGE2 production, but neither alpha- nor gamma-tocopherol was effective at inhibiting cytokine-stimulated inflammatory processes. These results show that the anti-inflammatory effects of tocopherols are highly cell type-, stimulus-, and endpoint-dependent. (C) 2004 Elsevier Inc. All rights reserved.
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