Vol 26, No 6 (2019)
Original articles — Clinical cardiology
Published online: 2018-03-02

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Mast cell derived carboxypeptidase A3 is decreased among patients with advanced coronary artery disease

Łukasz Lewicki1, Janusz Siebert2, Tomasz Koliński3, Karolina Piekarska4, Magdalena Reiwer-Gostomska5, Radosław Targoński6, Piotr Trzonkowski7, Natalia Marek-Trzonkowska8
Pubmed: 29512095
Cardiol J 2019;26(6):680-686.

Abstract

Background: Coronary artery disease (CAD) affects milions of people and can result in myocardial
infarction (MI). Previously, mast cells (MC) have been extensively investigated in the context of hypersensitivity,
however as regulators of the local inflammatory response they can potentially contribute to
CAD and/or its progression. The aim of the study was to assess if serum concentration of MC proteases:
carboxypeptidase A3, cathepsin G and chymase 1 is associated with the extension of CAD and MI.
Methods: The 44 patients with angiographically confirmed CAD (23 subjects with non-ST-segment
elevation MI [NSTEMI] and 21 with stable CAD) were analyzed. Clinical data were obtained as well
serum concentrations of carboxypeptidase A3, cathepsin G and chymase 1 were also measured.
Results: Patients with single vessel CAD had higher serum concentration of carboxypeptidase than
those with more advanced CAD (3838.6 ± 1083.1 pg/mL vs. 2715.6 ± 442.5 pg/mL; p = 0.02). There
were no significant differences in levels of any protease between patients with stable CAD and those with
NSTEMI. Patients with hypertension had ≈2-fold lower serum levels of cathepsin G than normotensive
individuals (4.6 ± 0.9 pg/mL vs. 9.4 ± 5.8 pg/mL; p = 0.001). Cathepsin G levels were also decreased
in sera of the current smokers as compared with non-smokers (3.1 ± 1.2 ng/mL vs. 5.8 ± 1.2 ng/mL,
p = 0.02).
Conclusions: Decreased serum level of carboxypeptidase is a hallmark of more advanced CAD. Lower
serum levels of carboxypeptidase A3 and catepsin G are associated with risk factors of blood vessel damage
suggesting a protective role of these enzymes in CAD.

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