Cancer Res 2016 Jan 1;76(1):24-9. doi: 10.1158/0008-5472.CAN-14-3432.
A Sucrose-Enriched Diet Promotes Tumorigenesis in Mammary Gland in Part through
the 12-Lipoxygenase Pathway.
Jiang Y1, Pan Y1, Rhea PR1, Tan L1, Gagea M2, Cohen L1, Fischer SM3, Yang P4.
Abstract
Epidemiologic studies have shown that dietary sugar intake has a significant impact on the development of breast cancer.
One proposed mechanism for how sugar impacts cancer development involves inflammation.
In the current study, we investigated the impact of dietary sugar on mammary gland tumor development in multiple
mouse models, along with mechanisms that may be involved.
We found that sucrose intake in mice comparable with levels of Western diets led to increased tumor growth and
metastasis, when compared with a nonsugar starch diet.
This effect was ascribed in part to increased expression of 12-lipoxygenase (12-LOX) and its arachidonate metabolite
12-hydroxy-5Z,8Z,10E,14Z-eicosatetraenoic acid (12-HETE).
We determined that fructose derived from the sucrose was responsible for facilitating lung metastasis and 12-HETE
production in breast tumors.
Overall, our data suggested that dietary sugar induces 12-LOX signaling to increase risks of breast cancer development
and metastasis.
- PMID: 26729790
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