Abstract
The objective of the present study was to determine the influence of dietary supplementation with pomegranate seed oil (PSO) and/or an aqueous extract of dried bitter melon fruits (BME) on breast cancer risk and fatty acid profile in serum of female rats with chemical carcinogen-inflicted mammary tumours. Sprague-Dawley rats (n = 96) were fed control diet or experimental diets supplemented with 0.15 ml PSO/day, BME or jointly PSO and BME. After 21 weeks mammary tumours were subjected to histopathological examination and in serum fatty acids, 8-isoprostaglandin F2α content and indices of desaturases activity were analysed. Supplementation of the diet with PSO and BME did not inhibit the breast cancer formation. Conjugated linolenic acids (CLnA), present in PSO, were converted into cis-9, trans-11 conjugated linoleic acid (CLA), however, its content was lower in groups treated with a carcinogen. A similar tendency was observed for the content of SFA, MUFA, PUFA, 8-iso PGF2α and the activity of Δ6-desaturase. Enhanced pro-carcinogenic effect of 7,12-dimethylbenz[a]anthracene (DMBA), caused by applied supplements, may be a result of their influence on DMBA metabolism.
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