A milk-fat based diet increases metastasis in the mmtv-pymt mouse model of breast cancer

Fabiola N. Velazquez, Valentina Viscardi, Julia Montemage, Leiqing Zhang, Carolena Trocchia, Megan M. Delamont, Rasheed Ahmad, Yusuf A. Hannun, Lina M. Obeid, Ashley J. Snider

Research output: Contribution to journalArticlepeer-review


A high-fat diet (HFD) and obesity are risk factors for many diseases including breast cancer. This is particularly important with close to 40% of the current adult population being overweight or obese. Previous studies have implicated that Mediterranean diets (MDs) partially protect against breast cancer. However, to date, the links between diet and breast cancer progression are not well defined. Therefore, to begin to define and assess this, we used an isocaloric control diet (CD) and two HFDs enriched with either olive oil (OOBD, high in oleate, and unsaturated fatty acid in MDs) or a milk fat-based diet (MFBD, high in palmitate and myristate, saturated fatty acids in Western diets) in a mammary polyomavirus middle T antigen mouse model (MMTV-PyMT) of breast cancer. Our data demonstrate that neither MFBD or OOBD altered the growth of primary tumors in the MMTV-PyMT mice. The examination of lung metastases revealed that OOBD mice exhibited fewer surface nodules and smaller metastases when compared to MFBD and CD mice. These data suggest that different fatty acids found in different sources of HFDs may alter breast cancer metastasis.

Original languageEnglish (US)
Article number2431
Issue number7
StatePublished - Jul 2021


  • Breast cancer
  • Diet
  • Fatty acid
  • Lung metastasis

ASJC Scopus subject areas

  • Food Science
  • Nutrition and Dietetics


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