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Systemic levels of MMP2/TIMP2 and cardiovascular risk in CAPD patients

Krystyna Pawlak1, Janina Tankiewicz, Michal Mysliwiec

  • 1Department of Monitored Pharmacotherapy, Medical University, Bialystok, Poland. dariuszpawlak @ poczta.onet.pl

Nephron. Clinical Practice
|April 29, 2010
PubMed
Abstract

Insights

Matrix metalloproteinase-2 (MMP-2) and tissue inhibitor of metalloproteinase-2 (TIMP-2) levels were elevated in continuous ambulatory peritoneal dialysis (CAPD) patients with cardiovascular disease (CVD). This suggests a link between the MMP/TIMP system, oxidative stress, and CVD in uremic patients.

Area of Science:

  • Biochemistry
  • Cardiovascular Medicine
  • Nephrology

Background:

  • Cardiovascular disease (CVD) is a significant complication in patients undergoing continuous ambulatory peritoneal dialysis (CAPD).
  • The roles of matrix metalloproteinases (MMPs), their inhibitors (TIMPs), oxidative stress, and the kynurenine (KYN) pathway in CVD progression are under investigation.
  • The interplay between these factors in the context of CAPD remains unclear.

Purpose of the Study:

  • To investigate the association between the MMP/TIMP system, kynurenine pathway metabolites, and oxidative stress markers with CVD prevalence in CAPD patients.
  • To explore the relationship between MMP-2, TIMP-2, kynurenine (KYN), quinolinic acid (QA), and Cu/Zn superoxide dismutase (Cu/Zn SOD) in CAPD patients with and without CVD.

Main Methods:

  • Assessed levels of MMP-2, MMP-9, TIMP-1, TIMP-2, KYN, QA, and Cu/Zn SOD in CAPD patients and healthy controls.
  • Compared biomarker levels between CAPD patients with CVD, CAPD patients without CVD, and healthy controls.
  • Utilized multiple regression analyses to identify independent predictors of MMP-2 and TIMP-2 levels.

Main Results:

  • CAPD patients with CVD exhibited significantly higher levels of MMP-2, TIMP-2, Cu/Zn SOD, KYN, and QA compared to those without CVD and controls.
  • MMP-2 and TIMP-2 levels showed positive correlations with QA and Cu/Zn SOD.
  • Multiple regression identified Cu/Zn SOD, TIMP-2, QA, and the QA/KYN ratio as independent factors associated with MMP-2, while MMP-2 and Cu/Zn SOD independently affected TIMP-2.

Conclusions:

  • Elevated MMP-2 and TIMP-2 concentrations are present in CAPD patients with CVD.
  • The upregulation of the MMP-2/TIMP-2 system is linked to increased quinolinic acid levels and oxidative status.
  • These findings suggest a connection between kynurenine pathway activation, arterial remodeling, and CVD prevalence in uremic patients on CAPD.

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