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BioMed Research International
Volume 2015 (2015), Article ID 860405, 11 pages
http://dx.doi.org/10.1155/2015/860405
Research Article

Variants of SCARB1 and VDR Involved in Complex Genetic Interactions May Be Implicated in the Genetic Susceptibility to Clear Cell Renal Cell Carcinoma

1Institute of Zoology, Faculty of Biology and Earth Sciences, Jagiellonian University, Gronostajowa 9, 30-387 Cracow, Poland
2Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Cracow, Poland
3Centre of Oncology, Maria Skłodowska-Curie Memorial Institute, Garncarska 11, 31-115 Cracow, Poland
4Department of Dermatology, Collegium Medicum of the Jagiellonian University, Skawińska 8, 31-066 Cracow, Poland

Received 8 October 2014; Revised 21 February 2015; Accepted 15 March 2015

Academic Editor: Zhaoming Wang

Copyright © 2015 Ewelina Pośpiech et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The current data are still inconclusive in terms of a genetic component involved in the susceptibility to renal cell carcinoma. Our aim was to evaluate 40 selected candidate polymorphisms for potential association with clear cell renal cell carcinoma (ccRCC) based on independent group of 167 patients and 200 healthy controls. The obtained data were searched for independent effects of particular polymorphisms as well as haplotypes and genetic interactions. Association testing implied position rs4765623 in the SCARB1 gene (, 95% CI: 1.104–2.582, ) and a haplotype in VDR comprising positions rs739837, rs731236, rs7975232, and rs1544410 () to be the risk factors in the studied population. The study detected several epistatic effects contributing to the genetic susceptibility to ccRCC. Variation in GNAS1 was implicated in a strong synergistic interaction with BIRC5. This effect was part of a model suggested by multifactor dimensionality reduction method including also a synergy between GNAS1 and SCARB1 (). Significance of GNAS1-SCARB1 interaction was further confirmed by logistic regression (), which also indicated involvement of SCARB1 in additional interaction with EPAS1 () as well as revealing interactions between GNAS1 and EPAS1 (), GNAS1 and MC1R (), GNAS1 and VDR (), and MC1R and VDR ().