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Neutrophils as Regulators and Biomarkers of Cardiovascular Inflammation in the Context of Abdominal Aortic Aneurysms

Journal

BIOMEDICINES
Volume 9, Issue 9, Pages -

Publisher

MDPI
DOI: 10.3390/biomedicines9091236

Keywords

neutrophils; cardiovascular diseases; biomarkers; abdominal aortic aneurysm; neutrophil granules; myeloperoxidase; neutrophil elastase; neutrophil extracellular traps (NETs); matrix metalloproteinase (MMP); inflammation

Funding

  1. Austrian Science Fund [F 5409-B21]
  2. Medical Scientific Fund of the Mayor of the City of Vienna [15012]

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Neutrophils play a central role in abdominal aortic aneurysm (AAA) pathogenesis, with neutrophil-derived biomarkers potentially aiding in diagnosis, prognosis, and early intervention. Future prospective clinical studies are needed to validate these promising biomarkers for predicting AAA presence, size, expansion rate, rupture risk, and postoperative outcome.
Neutrophils represent up to 70% of circulating leukocytes in healthy humans and combat infection mostly by phagocytosis, degranulation and NETosis. It has been reported that neutrophils are centrally involved in abdominal aortic aneurysm (AAA) pathogenesis. The natural course of AAA is growth and rupture, if left undiagnosed or untreated. The rupture of AAA has a very high mortality and is currently among the leading causes of death worldwide. The use of noninvasive cardiovascular imaging techniques for patient screening, surveillance and postoperative follow-up is well established and recommended by the current guidelines. Neutrophil-derived biomarkers may offer clinical value to the monitoring and prognosis of AAA patients, allowing for potential early therapeutic intervention. Numerous promising biomarkers have been studied. In this review, we discuss neutrophils and neutrophil-derived molecules as regulators and biomarkers of AAA, and our aim was to specifically highlight diagnostic and prognostic markers. Neutrophil-derived biomarkers may potentially, in the future, assist in determining AAA presence, predict size, expansion rate, rupture risk, and postoperative outcome once validated in highly warranted future prospective clinical studies.

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