Pancreatic cancer risk is modulated by inflammatory potential of diet and ABO genotype: A consortia-based evaluation and replication study

Samuel O. Antwi, William R. Bamlet, Katrina S. Pedersen, Kari G. Chaffee, Harvey A. Risch, Nitin Shivappa, Susan E. Steck, Kristin E. Anderson, Paige M. Bracci, Jerry Polesel, Diego Serraino, Carlo La Vecchia, Cristina Bosetti, Donghui Li, Ann L. Oberg, Alan A. Arslan, Demetrius Albanes, Eric J. Duell, Inge Huybrechts, Laufey T. AmundadottirRobert Hoover, Satu Mannisto, Stephen J. Chanock, Wei Zheng, Xiao Ou Shu, Magdalena Stepien, Federico Canzian, Bas Bueno-De-Mesquita, José Ramon Quirós, Anne Zeleniuch-Jacquotte, Fiona Bruinsma, Roger L. Milne, Graham G. Giles, James R. Hébert, Rachael Z. Stolzenberg-Solomon, Gloria M. Petersen

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Diets with high inflammatory potential are suspected to increase risk for pancreatic cancer (PC). Using pooled analyses, we examined whether this association applies to populations from different geographic regions and population subgroups with varying risks for PC, including variation in ABO blood type. Data from six case-control studies (cases, n = 2414; controls, n = 4528) in the Pancreatic Cancer Case-Control Consortium (PanC4) were analyzed, followed by replication in five nested case-control studies (cases, n = 1268; controls, n = 4215) from the Pancreatic Cancer Cohort Consortium (PanScan). Two polymorphisms in the ABO locus (rs505922 and rs8176746) were used to infer participants' blood types. Dietary questionnaire-derived nutrient/food intake was used to compute energy-adjusted dietary inflammatory index (E-DII) scores to assess inflammatory potential of diet. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using multivariable-adjusted logistic regression. Higher E-DII scores, reflecting greater inflammatory potential of diet, were associated with increased PC risk in PanC4 [ORQ5 versus Q1=2.20, 95% confidence interval (CI) = 1.85-2.61, Ptrend < 0.0001; ORcontinuous = 1.20, 95% CI = 1.17-1.24], and PanScan (ORQ5 versus Q1 = 1.23, 95% CI = 0.92-1.66, Ptrend = 0.008; ORcontinuous = 1.09, 95% CI = 1.02-1.15). As expected, genotype-derived non-O blood type was associated with increased PC risk in both the PanC4 and PanScan studies. Stratified analyses of associations between E-DII quintiles and PC by genotype-derived ABO blood type did not show interaction by blood type (Pinteraction = 0.10 in PanC4 and Pinteraction=0.13 in PanScan). The results show that consuming a pro-inflammatory diet and carrying non-O blood type are each individually, but not interactively, associated with increased PC risk.

Original languageEnglish (US)
Pages (from-to)1056-1067
Number of pages12
Issue number8
StatePublished - Jul 30 2018

ASJC Scopus subject areas

  • Cancer Research


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