期刊
ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY
卷 21, 期 6, 页码 1029-1033出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1161/01.ATV.21.6.1029
关键词
LDL; lipid oxidation; antioxidants; alpha-tocopherol; F-2-isoprostanes
资金
- NCI NIH HHS [P30 CA012197, CA-12107] Funding Source: Medline
- NCRR NIH HHS [M01-RR-07122, M01 RR007122] Funding Source: Medline
- NIA NIH HHS [AG-12559, R01 AG012559-03] Funding Source: Medline
Dietary polyunsaturated fats and vitamin E are associated with reduced risk for atherosclerosis, but in smokers, they could promote lipid oxidation. Therefore, we examined the effects of a high polyunsaturated fat diet and vitamin E supplementation on measures of lipid oxidation in cigarette smokers. Ten subjects who smoked >1 pack of cigarettes per day were sequentially fed the following: a baseline diet in which the major fat source was olive oil, a diet in which the major fat source was high-linoleic safflower oil, and finally, the safflower oil diet plus 800 IU vitamin E per day. LDL oxidation lag time and rate and plasma total F-2-isoprostanes and prostaglandin F-2 alpha (PGF(2 alpha)) were determined after 3 weeks on each diet. The safflower oil diet increased total F-2-isoprostanes from 53.0 +/-7.2 to 116.2 +/- 11.2 nmol/L and PGF(2 alpha) from 3.5 +/-0.2 to 5.5 +/-0.5 nmol/L, without changing LDL oxidation parameters. Addition of vitamin E prolonged mean LDL oxidation lag time but, paradoxically, further increased F-2-isoprostanes to 188.2 +/- 10.9 nmol/L and PGF(2 alpha) to 7.8 +/-0.4 nmol/L. These data suggest that vitamin E may function as a pro-oxidant in cigarette smokers consuming a high polyunsaturated fat diet.
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