[Effect of high dietary fat on the total DNA and receptor contents in rats with 7,12-dimethylbenz[A]anthracene-induced mammary carcinoma].

The influences of high dietary fat on the malignant intensity and the hormone receptors of DMBA-induced mammary breast carcinoma were analyzed in female Sprague-Dawley rats. The rats were fed either a low-fat diet or high-fat diet after the DMBA administration. As the results, incidence, size, average latent period, DNA histogram, DNA index and % of S-phase fraction of tumor were significantly different between both groups. But the ER and PgR contents were not different between both groups. The results suggest that a high dietary fat could increase the malignant intensity of the tumor but does not influence the receptor contents of the tumors.