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COMT-Val158Met-polymorphism is not a risk factor for acute kidney injury after cardiac surgery

Matthias Kornek1, Marcus-André Deutsch, Stefan Eichhorn

  • 1Klinik fuer Herz- und Gefaeßchirurgie, Deutsches Herzzentrum Muenchen, Technische Universitaet Muenchen, Munich Heart Alliance, Lazarettstrasse 36, 80636 Munich, Germany.

Disease Markers
|October 30, 2013
PubMed

Insights

This study found no link between the COMT Val158Met polymorphism and cardiac surgery-associated acute kidney injury (CSA-AKI). These findings exclude a genetic association for CSA-AKI risk in patients undergoing cardiopulmonary bypass.

Area of Science:

  • Nephrology
  • Cardiology
  • Pharmacogenetics

Background:

  • Cardiac surgery-associated acute kidney injury (CSA-AKI) is a significant complication following cardiopulmonary bypass (CPB).
  • Vasomotor tone dysregulation is a suspected cause of CSA-AKI.
  • The catechol-O-methyltransferase (COMT) gene Val158Met polymorphism (rs4680) influences enzyme activity and has been investigated for CSA-AKI associations.

Purpose of the Study:

  • To investigate the association between the COMT Val158Met polymorphism and the incidence of CSA-AKI.
  • To determine if specific COMT genotypes increase the risk of CSA-AKI after cardiac surgery.

Main Methods:

  • Prospective study of 1741 patients undergoing elective cardiac surgery with CPB.
  • Genotyping for the COMT Val158Met (G/A) polymorphism (rs4680).
  • Analysis of association with RIFLE criteria and postoperative creatinine increase, controlling for clinical factors.

Main Results:

  • No significant differences in demographics or procedural data were observed between COMT genotypes.
  • No association was found between COMT genotypes and CSA-AKI incidence (RIFLE criteria).
  • Postoperative creatinine increase was significantly associated with aortic cross-clamp time, CPB time, norepinephrine, and age, but not COMT genotype.

Conclusions:

  • The COMT Val158Met polymorphism is not associated with the development of CSA-AKI in patients undergoing cardiac surgery with CPB.
  • Genetic factors related to COMT activity do not appear to play a significant role in CSA-AKI pathogenesis.
  • Clinical factors like CPB duration and vasopressor use are key determinants of postoperative kidney injury.
Abstract

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