The rs11515 polymorphism is more frequent and associated with aggressive breast tumors with increased ANRIL and decreased p16INK4A expression

Frontiers in Oncology

I. Alasdair eRussell¹  Wendy eSweet²  Christine Schomisch Moravec²  W. H. Wilson eTang²  Anna ePilbrow³  Chris eFramptom³  Margaret Jane Currie⁴  Helen eMorrin⁴  Tania Lee Slatter⁵  Janice Anne Royds⁵  Antonio eAhn⁵  Noelyn Anne Hung⁵ 

[1] Cancer Research UK;Kaufman Center for Heart Failure, Cleveland Clinic;University of Otago Christchurch;University of Otago, Christchurch;University of Otago;

关键词: breast cancer;    Single nucleotide polymorphisms;    ANRIL;    p16INK4a;    9p21;    rs11515;   

DOI  :  10.3389/fonc.2015.00306

来源: DOAJ

【 摘 要 】

Chromosome position 9p21 encodes three-tumor suppressors p16INK4a, p14ARF, and p15INK4b, and the long non-coding RNA ANRIL (antisense noncoding RNA in the INK4 locus). The rs11515 single nucleotide polymorphism in the p16INK4a/p14ARF 3′ untranslated region is associated with glioblastoma, melanoma, and other cancers. This study investigated the frequency and effect of rs11515 genotypes in breast cancer. Genomic DNA samples from 400 women (200 with and 200 without a diagnosis of breast cancer) were genotyped for the rs11515 major © and minor (G) alleles. The rs11515 polymorphism was also investigated in 108 heart tissues to test for tissue specific effects. Four 9p21 transcripts, p16INK4a, p14ARF, p15INK4b, and ANRIL were measured in breast tumors and myocardium using quantitative PCR. Heterozygotes (CG genotype) were more frequent in women with breast cancer compared to the control population (P = 0.0039). In those with breast cancer the CG genotype was associated with an older age (P = 0.016), and increased lymph node involvement (P = 0.007) compared to homozygotes for the major allele (CC genotype). In breast tumors the CG genotype had higher ANRIL (P = 0.031) and lower p16INK4a (P = 0.006) expression compared to the CC genotype. The CG genotype was not associated with altered 9p21 transcripts in heart tissue. In breast cancer the rs11515 CG genotype is more frequent and associated with a more aggressive tumor that could be due to increased ANRIL and reduced p16INK4a expression. The absence of associations between rs11515 genotypes and 9p21 transcripts in heart tissue suggests this polymorphism has tissue or disease specific functions.

【 授权许可】

Unknown