A link between premenopausal iron deficiency and breast cancer malignancy.

Abstract:

BACKGROUND:Young breast cancer (BC) patients less than 45 years old are at higher risk of dying from the disease when compared to their older counterparts. However, specific risk factors leading to this poorer outcome have not been identified. METHODS:One candidate is iron deficiency, as this is common in young women and a clinical feature of young age. In the present study, we used immuno-competent and immuno-deficient mouse xenograft models as well as hemoglobin as a marker of iron status in young BC patients to demonstrate whether host iron deficiency plays a pro-metastatic role. RESULTS:We showed that mice fed an iron-deficient diet had significantly higher tumor volumes and lung metastasis compared to those fed normal iron diets. Iron deficiency mainly altered Notch but not TGF-β and Wnt signaling in the primary tumor, leading to the activation of epithelial mesenchymal transition (EMT). This was revealed by increased expression of Snai1 and decreased expression of E-cadherin. Importantly, correcting iron deficiency by iron therapy reduced primary tumor volume, lung metastasis, and reversed EMT markers in mice. Furthermore, we found that mild iron deficiency was significantly associated with lymph node invasion in young BC patients (p<0.002). CONCLUSIONS:Together, our finding indicates that host iron deficiency could be a contributor of poor prognosis in young BC patients.

journal_name

BMC Cancer

journal_title

BMC cancer

authors

Jian J,Yang Q,Shao Y,Axelrod D,Smith J,Singh B,Krauter S,Chiriboga L,Yang Z,Li J,Huang X

doi

10.1186/1471-2407-13-307

subject

Has Abstract

pub_date

2013-06-24 00:00:00

pages

307

issn

1471-2407

pii

1471-2407-13-307

journal_volume

13

pub_type

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