Weighing the Risk: effects of Obesity on the Mammary Gland and Breast Cancer Risk.

Journal of Mammary Gland Biology and Neoplasia
Lauren E Hillers-Ziemer, Lisa M Arendt

Abstract

Obesity is a preventable risk factor for breast cancer following menopause. Regardless of menopausal status, obese women who develop breast cancer have a worsened prognosis. Breast tissue is comprised of mammary epithelial cells organized into ducts and lobules and surrounded by adipose-rich connective tissue. Studies utilizing multiple in vivo models of obesity as well as human breast tissue have contributed to our understanding of how obesity alters mammary tissue. Localized changes in mammary epithelial cell populations, elevated secretion of adipokines and angiogenic mediators, inflammation within mammary adipose tissue, and remodeling of the extracellular matrix may result in an environment conducive to breast cancer growth. Despite these significant alterations caused by obesity within breast tissue, studies have suggested that some, but not all, obesity-induced changes may be mitigated with weight loss. Here, we review our current understanding regarding the impact of obesity on the breast microenvironment, how obesity-induced changes may contribute to breast tumor progression, and the impact of weight loss on the breast microenvironment.

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Citations

Jan 23, 2021·Journal of Mammary Gland Biology and Neoplasia·Teresa MonkkonenZuzana Koledova
Jul 3, 2021·International Journal of Molecular Sciences·Farrukh AqilRamesh C Gupta

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