Identification of a functional variant in SPLUNC1 associated with nasopharyngeal carcinoma susceptibility among Malaysian Chinese - PubMed (original) (raw)
. 2012 Oct:51 Suppl 1:E74-82.
doi: 10.1002/mc.21857. Epub 2011 Dec 27.
Taisei Mushiroda, Kazuma Kiyotani, Gopala Krishnan Govindasamy, Lee-Fah Yap, Soo-Hwang Teo, Paul Vey-Hong Lim, Selvaratnam Govindaraju, Kananathan Ratnavelu, Choon-Kook Sam, Yoke-Yeow Yap, Alan Soo-Beng Khoo, Kin-Choo Pua, Yusuke Nakamura; Malaysian NPC Study Group; Ching-Ching Ng
Collaborators, Affiliations
- PMID: 22213098
- DOI: 10.1002/mc.21857
Identification of a functional variant in SPLUNC1 associated with nasopharyngeal carcinoma susceptibility among Malaysian Chinese
Poh-Yin Yew et al. Mol Carcinog. 2012 Oct.
Abstract
Nasopharyngeal carcinoma (NPC) is a multifactorial and polygenic disease with high incidence in Asian countries. Epstein-Barr virus infection, environmental and genetic factors are believed to be involved in the tumorigenesis of NPC. The association of single nucleotide polymorphisms (SNPs) in LPLUNC1 and SPLUNC1 genes with NPC was investigated by performing a two-stage case control association study in a Malaysian Chinese population. The initial screening consisted of 81 NPC patients and 147 healthy controls while the replication study consisted of 366 NPC patients and 340 healthy controls. The combined analysis showed that a SNP (rs2752903) of SPLUNC1 was significantly associated with the risk of NPC (combined P = 0.00032, odds ratio = 1.62, 95% confidence interval = 1.25-2.11). In the subsequent dense fine mapping of SPLUNC1 locus, 36 SNPs in strong linkage disequilibrium with rs2752903 (r(2) ≥ 0.85) were associated with NPC susceptibility. Screening of these variants by electrophoretic mobility shift and luciferase reporter assays showed that rs1407019 located in intron 3 (r(2) = 0.994 with rs2752903) caused allelic difference in the binding of specificity protein 1 (Sp1) transcription factor and affected luciferase activity. This SNP may consequently alter the expression of SPLUNC1 in the epithelial cells. In summary, our study suggested that rs1407019 in intronic enhancer of SPLUNC1 is associated with NPC susceptibility in which its A allele confers an increased risk of NPC in the Malaysian Chinese population.
Copyright © 2011 Wiley Periodicals, Inc.
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