Format

Send to

Choose Destination
Breast Cancer Res Treat. 2018 Jan;167(2):591-598. doi: 10.1007/s10549-017-4525-9. Epub 2017 Oct 17.

Serum selenium levels predict survival after breast cancer.

Author information

1
Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, ul. Połabska 4, 70-115, Szczecin, Poland.
2
ReadGene, Grzepnica, Poland.
3
Regional Oncology Centre, Szczecin, Poland.
4
Department of Surgical Oncology, Pomeranian Medical University, Szczecin, Poland.
5
Women's College Research Institute, 76 Grenville Street, 6th Floor, Toronto, ON, M5S 1B2, Canada.
6
Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.
7
Women's College Research Institute, 76 Grenville Street, 6th Floor, Toronto, ON, M5S 1B2, Canada. steven.narod@wchospital.ca.
8
Dalla Lana School of Public Health, University of Toronto, Toronto, Canada. steven.narod@wchospital.ca.

Abstract

BACKGROUND:

Studies have reported an inverse relationship between serum selenium levels and cancer incidence, but the impact of low serum selenium status on survival after a diagnosis of breast cancer has not been established.

METHODS:

We obtained a blood sample from 546 women diagnosed with a first primary invasive breast cancer between 2008 and 2015 in the region of Szczecin, Poland. Blood was collected after diagnosis, but prior to treatment. Serum selenium was quantified by mass spectroscopy and each patient was assigned to one of four categories (quartiles) based on the distribution in the entire cohort. Patients were followed from diagnosis to death over a mean follow-up of 3.8 years. Vital status was obtained by linkage to the Polish National Death Registry.

RESULTS:

The 5-year overall actuarial survival was 68.1% for women in the lowest (< 64.4 µg/L) and 82.5% for those in the highest (> 81.0 µg/L) quartile of serum selenium. In an adjusted analysis, the hazard ratio for death was 2.49 (95%CI 1.53-4.04; P = 0.0002) for patients in the lowest quartile of serum selenium, compared to those in all other quartiles. The effect of low selenium on breast cancer-specific mortality was stronger for women who were past smokers (HR 6.03; 95%CI 1.96-18.6; P = 0.0002).

CONCLUSIONS:

This study suggests that a selenium level in excess of 64.4 µg//L might be beneficial for women undergoing treatment for breast cancer and that selenium supplementation to achieve this level may favorably impact the outcome. Further studies are needed to confirm this association and to evaluate the impact of selenium supplementation on breast cancer survival among women with low post-diagnostic selenium levels.

KEYWORDS:

Breast cancer; Mortality; Selenium

PMID:
29043463
DOI:
10.1007/s10549-017-4525-9
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Springer
Loading ...
Support Center