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Inhibition of 7,12-dimethylbenz[a]anthracene (DMBA)-induced mammary tumorigenesis and of in vivo formation of mammary DMBA-DNA adducts by rosemary extract.

Abstract：

:The effect of dietary intake of an extract of the spice plant Rosmarinus officinalis L. on 7,12-dimethylbenz[a]anthracene (DMBA)-induced mammary tumorigenesis and on the in vivo formation of mammary DMBA-DNA adducts was evaluated. Supplementation of a semi-purified diet with 1.0% (by wt.) rosemary extract resulted in a significant (47%) decrease in mammary tumor incidence compared to controls. In subsequent studies, dietary supplementation with 0.5% and 1.0% rosemary extract inhibited total in vivo binding of DMBA to mammary epithelial cell DNA by an average of 42%. This decrease in total binding was not due to a uniform decrease in the formation of all mammary DMBA-DNA adducts. The formation of two major adducts derived from the anti-diastereomer of DMBA and bound to deoxyguanosine (anti-dGuo) was significantly decreased at both dietary rosemary concentrations. The formation of the syn-dGuo adduct also was inhibited, whereas formation of the syn-dAdo adduct was unaffected by consumption of the rosemary extract. These studies suggest that use of rosemary extract and its individual antioxidative constituents as chemopreventative agents for experimental mammary tumorigenesis warrant further investigation.

journal_name

Cancer Lett

journal_title

Cancer letters

authors

Singletary KW,Nelshoppen JM

doi

10.1016/0304-3835(91)90224-6

subject

Has Abstract

pub_date

1991-11-01 00:00:00

pages

169-75

issue

2

eissn

0304-3835

issn

1872-7980

pii

0304-3835(91)90224-6

journal_volume

60

pub_type

杂志文章

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