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Association between polymorphisms in long non-coding RNA PRNCR1 in 8q24 and risk of colorectal cancer

Lijuan Li12, Ruifen Sun3, Yundan Liang12, Xinmin Pan24, Zhaohui Li5, Peng Bai2, Xiaofeng Zeng6, Dongxian Zhang6, Lin Zhang12* and Linbo Gao1*

Author Affiliations

1 Laboratory of Molecular and Translational Medicine, West China Institute of Women and Children’s Health; Key Laboratory of Obstetric & Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China

2 Department of Forensic Biology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China

3 Central Laboratory, Yunnan University of Chinese Traditional Medicine, Kunming 650500, Yunnan, P.R. China

4 Department of Forensic Pathology, College of Forensic Medicine, Henan University of Science and Technology, Luoyang, Henan 471003, P.R. China

5 Secondary Department of General Surgery, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan 471003, P.R. China

6 Department of Forensic Medicine, Kunming Medical University, Kunming, Yunnan 650500, P.R. China

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Journal of Experimental & Clinical Cancer Research 2013, 32:104  doi:10.1186/1756-9966-32-104

Published: 13 December 2013

Abstract

Background

Genome-wide association studies have identified that genetic variants in 8q24 confer susceptibility to colorectal cancer (CRC). Recently, a novel lncRNA (PRNCR1) that located in the 8q24 was discovered. Single nucleotide polymorphisms (SNPs) in the lncRNAs may influence the process of splicing and stability of mRNA conformation, resulting in the modification of its interacting partners. We hypothesized that SNPs in the lncRNA PRNCR1 may be related to the risk of CRC.

Methods

We conducted a case–control study and genotyped five tag SNPs in the lncRNA PRNCR1 in 908 subjects including 313 cases with CRC and 595 control subjects using polymerase chain reaction–restriction fragment length polymorphism (PCR-RFLP) assay.

Results

In overall analyses, we found that the rs13252298 and rs1456315 were associated with significantly decreased risks of CRC. In stratification analyses, we found that CRC patients carrying the rs1456315G were likely to have a tumor size of greater than 5 cm (G vs. A: adjusted OR = 1.56, 95% CI: 1.10-2.23). Additionally, patients with the rs7007694C and rs16901946G had decreased risks to develop poorly differentiated CRC, whereas patients with the rs1456315G had an increased risk to develop poorly differentiated CRC.

Conclusion

These findings suggest that SNPs in the lncRNA PRNCR1 may contribute to susceptibility to CRC.

Keywords:
Colorectal cancer; LncRNAs; Polymorphism