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Antioxidant Effects of Phytosterol and Its Components
Open accessAbstract
Phytosterol contained in vegetable oils is known to exert a hypocholesterolemic function. In the present study, the antioxidant effects of phytosterol and its components, beta-sitosterol, stigmasterol, and campesterol, against lipid peroxidation were examined by making a comparison with 2,2,5,7,8-pentamethyl-6-chromanol (PMC). It was found that these compounds exerted antioxidant effects on the oxidation of methyl linoleate in solution and its effect decreased in the order of: PMC >> phytosterol approximately campesterol approximately beta-sitosterol > stigmasterol. Phytosterol also suppressed the oxidation and consumption of alpha-tocopherol in beta-linoleoyl-gamma-palmitoyl phosphatidylcholine (PLPC) liposomal membranes, the effects being more significant than dimyristoyl PC of the same concentration. Stigmasterol accelerated the oxidation of both methyl linoleate in solution and PLPC liposomal membranes in aqueous dispersions, which was ascribed to the oxidation of allylic hydrogens at the 21- and 24-positions. Taken together, the present study shows that phytosterol chemically acts as an antioxidant, a modest radical scavenger, and physically as a stabilizer in the membranes.
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Cites
Mechanisms of free radical oxidation of unsaturated lipids
Porter, N. A., Caldwell, S. E., & Mills, K. A. (1995) · Lipids · doi:10.1007/bf02536034 · Cited by 1,208
Plant sterol and stanol margarines and health
Law, M. (2000) · BMJ · doi:10.1136/bmj.320.7238.861 · Cited by 729
Cited by
An update on β-sitosterol: A potential herbal nutraceutical for diabetic management
Babu, S., & Jayaraman, S. (2020) · Biomedicine & Pharmacotherapy · doi:10.1016/j.biopha.2020.110702 · Cited by 658
Antioxidant-rich natural fruit and vegetable products and human health
Jideani, A. I. O., Silungwe, H., Takalani, T., Omolola, A. O., Udeh, H. O., & Anyasi, T. A. (2021) · International Journal of Food Properties · doi:10.1080/10942912.2020.1866597 · Cited by 298
Metadata
- Authors
- YOSHIDA, Y., & NIKI, E.
- Venue
- Journal of Nutritional Science and Vitaminology
- Published
- 2003
- Volume
- 49
- Issue
- 4
- Pages
- 277-280
- ISSN
- 0301-4800 (ISSN-L)
- 1881-7742
- OpenAlex
- W1968212840
- Cited by
- 300
- References
- 2
- FWCI
- 1.47
- Type
- journal article
- Language
- en
- Open access
- diamond
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