PLoS ONE (Jan 2019)

Common variants in glyoxalase I do not increase chronic pancreatitis risk.

  • Tom Kaune,
  • Marcus Hollenbach,
  • Bettina Keil,
  • Jian-Min Chen,
  • Emmanuelle Masson,
  • Carla Becker,
  • Marko Damm,
  • Claudia Ruffert,
  • Robert Grützmann,
  • Albrecht Hoffmeister,
  • Rene H M Te Morsche,
  • Giulia Martina Cavestro,
  • Raffaella Alessia Zuppardo,
  • Adrian Saftoiu,
  • Ewa Malecka-Panas,
  • Stanislaw Głuszek,
  • Peter Bugert,
  • Markus M Lerch,
  • Frank Ulrich Weiss,
  • Wen-Bin Zou,
  • Zhuan Liao,
  • Peter Hegyi,
  • Joost Ph Drenth,
  • Jan Riedel,
  • Claude Férec,
  • Markus Scholz,
  • Holger Kirsten,
  • Andrea Tóth,
  • Maren Ewers,
  • Heiko Witt,
  • Heidi Griesmann,
  • Patrick Michl,
  • Jonas Rosendahl

DOI
https://doi.org/10.1371/journal.pone.0222927
Journal volume & issue
Vol. 14, no. 10
p. e0222927

Abstract

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INTRODUCTION:Chronic pancreatitis (CP) may be caused by oxidative stress. An important source of reactive oxygen species (ROS) is the methylglyoxal-derived formation of advanced glycation endproducts (AGE). Methylglyoxal is detoxified by Glyoxalase I (GLO1). A reduction in GLO1 activity results in increased ROS. Single nucleotide polymorphisms (SNPs) of GLO1 have been linked to various inflammatory diseases. Here, we analyzed whether common GLO1 variants are associated with alcoholic (ACP) and non-alcoholic CP (NACP). METHODS:Using melting curve analysis, we genotyped a screening cohort of 223 ACP, 218 NACP patients, and 328 controls for 11 tagging SNPs defined by the SNPinfo LD TAG SNP Selection tool and the functionally relevant variant rs4746. For selected variants the cohorts were extended to up to 1,441 patient samples. RESULTS:In the ACP cohort, comparison of genotypes for rs1937780 between patients and controls displayed an ambiguous result in the screening cohort (p = 0.08). However, in the extended cohort of 1,441 patients no statistically significant association was found for the comparison of genotypes (p = 0.11), nor in logistic regression analysis (p = 0.214, OR 1.072, 95% CI 0.961-1.196). In the NACP screening cohort SNPs rs937662, rs1699012, and rs4746 displayed an ambiguous result when patients were compared to controls in the recessive or dominant model (p = 0.08, 0.08, and 0.07, respectively). Again, these associations were not confirmed in the extended cohorts (rs937662, dominant model: p = 0.07, logistic regression: p = 0.07, OR 1.207, 95% CI 0.985-1.480) or in the replication cohorts for rs4746 (Germany, p = 0.42, OR 1.080, 95% CI 0.673-1.124; France, p = 0.19, OR 0.90, 95% CI 0.76-1.06; China, p = 0.24, OR 1.18, 95% CI 0.90-1.54) and rs1699012 (Germany, Munich; p = 0.279, OR 0.903, 95% CI 0.750-1.087). CONCLUSIONS:Common GLO1 variants do not increase chronic pancreatitis risk.