Feeding a High-Fat Diet for a Limited Duration Increases Cancer Incidence in a Breast Cancer Model.

BREAST tumor prevention; BREAST tumor risk factors; BIOLOGICAL models; HUMAN growth; DISEASE progression; FOOD habits; MEAT; FOOD consumption; ANIMAL experimentation; TIME; CARCINOGENESIS; AGE distribution; DISEASE incidence; RISK assessment; RATS; GENE expression; DNA methylation; DUCTAL carcinoma; BREAST cancer; CELL survival; RESEARCH funding; CORN oil; BREAST; CELL proliferation; CELL lines; DIETARY fats; BREAST tumors; EPIGENOMICS

High-fat intake by young Asian women impacts the risk of breast cancer. Understanding the underlying molecular mechanisms may be essential for disease prevention in Asia as well as globally. We aimed to examine the effects of corn oil- and animal fat-based high-fat diets (32.9 and 31.4%, respectively, of fat energy ratio as compared to 12.3% in the standard diet) on mammary carcinogenesis and alterations in gene expression and epigenetic statuses in the mammary gland during the growth stages in a rat model. An increased incidence of carcinomas was observed after the cessation of high-fat feeding. In addition, rapid tumor growth and elevations in Celsr2 expression, which may be a result of DNA hypomethylation patterns in the 3′ untranslated region of the gene were noted in the animal fat group. In the human breast carcinoma cell line MCF7, a marginal decrease in cell viability was observed following the knockdown of Celsr2, suggesting that the animal fat-associated risk of cancer is partly due to the deregulation of mammary cell proliferation via non-metabolic gene functions. The present results will contribute to the development of strategies for controlling the food-associated risk of breast cancer, particularly in younger age groups. [ABSTRACT FROM AUTHOR]

Copyright of Nutrition & Cancer is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)