A prostate cancer susceptibility allele at 6q22 increases RFX6 expression by modulating HOXB13 chromatin binding

Qilai Huang, Thomas Whitington, Ping Gao, Johan F. Lindberg, Yuehong Yang, Jielin Sun, Marja-Riitta Väisänen, Robert Szulkin, Matti Annala, Jian Yan, Lars A. Egevad, Kai Zhang, Ruizhu Lin, Arttu Jolma, Matti Nykter, Aki Manninen, Fredrik Wiklund, Markku H. Vaarala, Tapio Visakorpi, Jianfeng XuJussi Taipale*, Gong-Hong Wei*

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

173 Citations (Scopus)

Abstract

Genome-wide association studies have identified thousands of SNPs associated with predisposition to various diseases, including prostate cancer. However, the mechanistic roles of these SNPs remain poorly defined, particularly for noncoding polymorphisms. Here we find that the prostate cancer risk-associated SNP rs339331 at 6q22 lies within a functional HOXB13-binding site. The risk-associated T allele at rs339331 increases binding of HOXB13 to a transcriptional enhancer, conferring allele-specific upregulation of the rs339331-associated gene RFX6. Suppression of RFX6 diminishes prostate cancer cell proliferation, migration and invasion. Clinical data indicate that RFX6 upregulation in human prostate cancers correlates with tumor progression, metastasis and risk of biochemical relapse. Finally, we observe a significant association between the risk-associated T allele at rs339331 and increased RFX6 mRNA levels in human prostate tumors. Together, our results suggest that rs339331 affects prostate cancer risk by altering RFX6 expression through a functional interaction with the prostate cancer susceptibility gene HOXB13.
Original languageEnglish
Pages (from-to)126-135
JournalNature Genetics
Volume46
Issue number2
Online published5 Jan 2014
DOIs
Publication statusPublished - Feb 2014
Externally publishedYes

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