A review of the interaction among dietary antioxidants and reactive oxygen species.

A review of the interaction among dietary antioxidants and reactive oxygen species. Research Abstract Details 

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A review of the interaction among dietary antioxidants and reactive oxygen species. Abstract Text:

Harold E Seifried,Darrell E Anderson,Evan I Fisher,John A Milner,

During normal cellular activities, various processes inside of cells produce reactive oxygen species (ROS). Some of the most common ROS are hydrogen peroxide (H(2)O(2)), superoxide ion (O(2)(-)), and hydroxide radical (OH(-)). These compounds, when present in a high enough concentration, can damage cellular proteins and lipids or form DNA adducts that may promote carcinogenic activity. The purpose of antioxidants in a physiological setting is to prevent ROS concentrations from reaching a high-enough level within a cell that damage may occur. Cellular antioxidants may be enzymatic (catalase, glutathione peroxidase, superoxide dismutase) or nonenzymatic (glutathione, thiols, some vitamins and metals, or phytochemicals such as isoflavones, polyphenols, and flavanoids). Reactive oxygen species are a potential double-edged sword in disease prevention and promotion. Whereas generation of ROS once was viewed as detrimental to the overall health of the organism, advances in research have shown that ROS play crucial roles in normal physiological processes including response to growth factors, the immune response, and apoptotic elimination of damaged cells. Notwithstanding these beneficial functions, aberrant production or regulation of ROS activity has been demonstrated to contribute to the development of some prevalent diseases and conditions, including cancer and cardiovascular disease (CVD). The topic of antioxidant usage and ROS is currently receiving much attention because of studies linking the use of some antioxidants with increased mortality in primarily higher-risk populations and the lack of strong efficacy data for protection against cancer and heart disease, at least in populations with adequate baseline dietary consumption. In normal physiological processes, antioxidants effect signal transduction and regulation of proliferation and the immune response. Reactive oxygen species have been linked to cancer and CVD, and antioxidants have been considered promising therapy for prevention and treatment of these diseases, especially given the tantalizing links observed between diets high in fruits and vegetables (and presumably antioxidants) and decreased risks for cancer.

A review of the interaction among dietary antioxidants and reactive oxygen species. Publishing Authors By Initials

HE Seifried,DE Anderson,EI Fisher,JA Milner,

For similar biological phenomena, cell phenomena, and immunity: cell physiology: cell communication: signal transduction research abstracts see: biological phenomena, cell phenomena, and immunity: cell physiology: cell communication: signal transduction research

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A review of the interaction among dietary antioxidants and reactive oxygen species. Journal Published:

PUBLICATION TYPE: Review

Journal: The Journal of nutritional biochemistry

VOLUME: 18

Page Numbers: 567-79

Journal Abbreviation: J. Nutr. Biochem.

ISSN: 0955-2863

DAY: 23

MONTH: 03

YEAR: 2007

A review of the interaction among dietary antioxidants and reactive oxygen species. Information

Number of References: 98

LANGUAGE: eng

NlmUniqueID: 9010081

A review of the interaction among dietary antioxidants and reactive oxygen species. Keywords Mesh Terms:

KEYWORDS: Signal Transduction

MESH TERMS: metabolism

Chemical & Substance for Abstract: A review of the interaction among dietary antioxidants and reactive oxygen species. Information

Substance Name: Reactive Oxygen Species

Registry Number: 0

Grant and Affiliation Information for A review of the interaction among dietary antioxidants and reactive oxygen species.

AFFILIATION: Division of Cancer Prevention, National Cancer Institute, Rockville, MD 20862, USA. hs41s@nih.gov

Country: United States

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MEDLINETA: J Nutr Biochem

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