Lipid peroxidation, oxidative stress genes and dietary factors in breast cancer protection: a hypothesis.
We have recently proposed that lipid peroxidation may be a common mechanistic pathway by which obesity and hypertension lead to increased renal cell cancer risk. During this exercise, we noted a risk factor swap between breast and kidney cancer (oophorectomy and increased parity, detrimental for kidney, beneficial for breast; high blood pressure, detrimental for kidney, beneficial for breast when it occurs during pregnancy; alcohol, beneficial for kidney, detrimental for breast, and so on). We have subsequently proposed the hypothesis that lipid peroxidation represents a protective mechanism in breast cancer, and reviewed the evidence of the role of lipid peroxidation on established hormonal and non-hormonal factors for breast cancer. Here, we review the evidence in support of lipid peroxidation playing a role in the relationships between dietary factors and breast cancer. Available evidence implicates increased lipid peroxidation products in the anti-carcinogenic effect of suspected protective factors for breast cancer, including soy, marine n-3 fatty acids, green tea, isothiocyanates, and vitamin D and calcium. We also review the epidemiological evidence supporting a modifying effect of oxidative stress genes in dietary factor-breast cancer relationships.
Gago-Dominguez
Manuela
M
USC/Norris Comprehensive Cancer Center, Department of Preventive Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033-0800, USA. mgago@usc.edu
Jiang
Xuejuan
X
Castelao
J Esteban
JE
D001943:Breast Neoplasms / Q000235:genetics / Q000378:metabolism*; D004032:Diet; D005260:Female; D006801:Humans; D015227:Lipid Peroxidation; D018384:Oxidative Stress