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Copy number variations (CNVs) have been recognized to contribute to phenotypic variations and to be associated with susceptibility to certain complex diseases. This study examined the functional significance of CNVR2966.1 at 6q13 and its association with pancreatic cancer susceptibility. The CNVR2966.1 was found to be a 10 379 bp nucleotides deletion/insertion within the uniform boundaries chromosome 6: 74 648 791−74 659 169. Luciferase reporter gene assays revealed an active regulator in CNVR2966.1, which was demonstrated by circular chromosome conformation capture assays to physically interact with the upstream functional sequence ofCDKN2B.CDKN2Btranscription levels in pancreatic tissues were therefore significantly higher in individuals with two copies of CNVR2966.1 than in those with low copy number of CNVR2966.1. The risk of pancreatic cancer observed in 1027 cases and 1031 controls was significantly associated with copy number of CNVR2966.1, with the odds ratio being 1.31 (95% confidence interval = 1.08–1.60;P= 0.007) for one copy genotype compared with two copies genotype. These results suggest that CNVR2966.1 is associated with pancreatic cancer risk probably owing to its effect on long-range regulation ofCDKN2B.

Copy number variation at 6q13 functions as a long-range regulator and is associated with pancreatic cancer risk