High-Fat Diets and Breast Cancer Risk

JAMA ◽  
1992 ◽  
Vol 268 (15) ◽  
pp. 2080 ◽  
Author(s):  
Geoffrey R. Howe
2016 ◽  
Vol 18 (1) ◽  
Author(s):  
Camile Castilho Fontelles ◽  
Luiza Nicolosi Guido ◽  
Mariana Papaléo Rosim ◽  
Fábia de Oliveira Andrade ◽  
Lu Jin ◽  
...  

2020 ◽  
Author(s):  
Fredrick O Onono ◽  
Lakshman Chelvarajan ◽  
Baoxiang Yan ◽  
Ebubechi Adindu ◽  
Esias Bedingar

Abstract BackgroundCancer cells are characterized by aberrant phosphatidylcholine (PC) metabolism. PC can be synthesized de novo or absorbed from diet, after digestion, by the intestinal enterocytes. Here, we investigated the association of dietary intake of PC and breast cancer development in mice. MethodsWe used tandem mass spectrometry methods to quantitate PC content of various fat sources used to manufacture rodent diets. Rodent diets were then formulated with either casein or amino acids in place of casein. To test the effects of dietary PC on tumor growth we fed low density lipoprotein receptor-null (LDLR–/–) mice high fat diets formulated with casein (high PC) or amino acids in place of casein (low PC). Endogenous PC biosynthesis and levels of total circulated plasma PC was monitored using stable isotope tracer choline and mass spectrometry analysis. Tumors were induced in mice after 12 weeks of high fat diet feeding. Since PC-derived molecules are important transducers of mitogenic signals, we tested the effects of inhibiting production of lysophosphatidic acid (LPA) using a recently described autotaxin (ATX) inhibitor. Finally, plasma inflammatory cytokine levels were analyzed to determine the effects of diets and ATX inhibition on systemic cytokine milieu. ResultsWe found that casein is the main source of PC when present in rodent diets. Replacing casein with amino acids increased the relative proportion of endogenously biosynthesized PC in mouse plasma. Compared to diets containing casein, amino acid-defined diets decreased primary tumor growth in the hyperlipidemic estrogen-receptor positive E0771 breast cancer mouse model. Inhibition of autotaxin with the potent inhibitor PAT-505 did not attenuate breast cancer development in these hyperlipidemic mice. Further, replacing casein with amino acids or treatment with PAT-505 significantly reduced systemic markers of inflammation. ConclusionOur results show that casein is a significant source of PC when present in rodent diets. Diets formulated with amino acids in place of casein have higher proportion of circulating PC from the endogenous biosynthetic pool. Casein-containing high fat diets promote primary breast tumor development in mice through mechanisms that involve systemic inflammation but is independent of LPA production by autotaxin.


2011 ◽  
Vol 7 (1) ◽  
pp. 1-3 ◽  
Author(s):  
Sandra Z Haslam ◽  
Richard C Schwartz

2008 ◽  
Vol 100 (5) ◽  
pp. 942-946 ◽  
Author(s):  
Mandy Schulz ◽  
Kurt Hoffmann ◽  
Cornelia Weikert ◽  
Ute Nöthlings ◽  
Matthias B. Schulze ◽  
...  

Epidemiological studies conducted thus far have mainly used a single-nutrient approach which may not be sufficient in detecting diet–cancer relationships. The aim of the study was to examine the association of a food pattern based on explained variations in fatty acid intake by means of reduced rank regression with breast cancer risk. Study participants were female subjects (n 15 351) of the European Prospective Investigation into Cancer and Nutrition (EPIC)-Potsdam Study free of cancer at baseline and with complete dietary and outcome information followed for an average of 6·0 years. Among those, 137 incident cases of invasive breast cancer were identified. We identified a food pattern characterized by low consumption of bread, and fruit juices, and high consumption of processed meat, fish, butter and other animal fats, and margarine explaining >42 % of total variation in fatty acid intake (SFA, MUFA, n-3 PUFA, n-6 PUFA). Intake of all four fatty acid fractions was positively associated with the pattern score. Adherence to this food pattern adjusted for covariates was associated with a two-fold risk (hazard ratio 2·00; 95 % CI 1·30, 3·09) of breast cancer comparing extreme tertiles of the pattern score. There was no evidence of effect modification by menopausal status, overweight status and use of hormone replacement therapy, respectively. In conclusion, a food pattern characterized by high-fat food choices was significantly associated with increased risk of breast cancer. Given that the food pattern was high in all fatty acid fractions, we found evidence for total dietary fat rather than for specific fatty acids to be associated with breast cancer risk.


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