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Published in: Journal of Cancer Research and Clinical Oncology 9/2013

01-09-2013 | Original Paper

Association of common gene variants in vitamin D modulating genes and colon cancer recurrence

Authors: Joanna Szkandera, Gudrun Absenger, Martin Pichler, Michael Stotz, Tanja Langsenlehner, Hellmut Samonigg, Wilfried Renner, Armin Gerger

Published in: Journal of Cancer Research and Clinical Oncology | Issue 9/2013

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Abstract

Purpose

Low concentrations of 25-hydroxyvitamin D3 (25(OH)D) have been associated with increased risk and poor prognosis of various cancer types, including colon cancer. Common genetic variants in genes that influence circulating 25(OH)D levels may affect vitamin D concentrations and risk of vitamin D insufficiency. In the present study, we investigated the association of three functional gene variants in GC (rs2282679 T>G), DHCR7 (rs12785878 G>T) and CYP2R1 (rs10741657 A>G) with time to recurrence (TTR) in patients with stages II and III colon cancer.

Methods

Two hundred and sixty-four patients were included in this retrospective study. Genomic DNA was genotyped for GC rs2282679 T>G, DHCR7 rs12785878 G>T and CYP2R1 rs10741657 A>G by 5′-exonuclease (TaqMan™) technology.

Results

In the univariate analysis, GC rs2282679 GG was significantly associated with decreased TTR (HR = 3.30, 95 % CI 1.09–9.97, p = 0.034) in patients with surgery alone and remained significantly associated in multivariate analysis including lymph node involvement and clinical stage (HR = 3.64, 95 % CI 1.16–11.46, p = 0.027). In patients with adjuvant chemotherapy, GC rs2282679 T>G was not significantly associated with TTR (HR = 1.02, 95 % CI 0.44–2.37, p = 0.964). Furthermore, we observed a trend toward decreased TTR in patients harboring the CYP2R1 rs10741657 A>G gene variant including all patients (HR = 1.50, 95 % CI 0.98–2.28, p = 0.060). No association was found between DHCR7 rs12785878 G>T and TTR in our study cohort.

Conclusion

In conclusion, our results may indicate a prognostic effect of GC rs2282679 in stages II and III colon cancer patients with surgery alone. Larger studies have to be performed to validate our findings.
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Metadata
Title
Association of common gene variants in vitamin D modulating genes and colon cancer recurrence
Authors
Joanna Szkandera
Gudrun Absenger
Martin Pichler
Michael Stotz
Tanja Langsenlehner
Hellmut Samonigg
Wilfried Renner
Armin Gerger
Publication date
01-09-2013
Publisher
Springer Berlin Heidelberg
Published in
Journal of Cancer Research and Clinical Oncology / Issue 9/2013
Print ISSN: 0171-5216
Electronic ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-013-1461-x

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