Elevated plasma level of PAI-1 is associated with severe COVID-19

Susumu Fukahori1,2, Yurika Kawazoe3, Jung Yeon Han1

  • 1Division of Allergy and Immunology, Department of Internal Medicine, USF Morsani College of Medicine, Tampa, FL, USA.

Scientific Reports
|August 4, 2025
PubMed

Insights

High levels of Plasminogen activator inhibitor-1 (PAI-1) indicate severe coronavirus disease (COVID-19). This endothelial injury marker may predict hospitalization and poor outcomes in COVID-19 patients, suggesting its use in clinical assessment.

Area of Science:

  • Cardiovascular Medicine
  • Infectious Diseases
  • Pathophysiology

Background:

  • Endothelial dysfunction is a hallmark of severe coronavirus disease (COVID-19).
  • Plasminogen activator inhibitor-1 (PAI-1) is implicated in endothelial injury and may serve as a prognostic indicator.
  • Understanding PAI-1's role can inform COVID-19 patient management.

Purpose of the Study:

  • To investigate the association between plasma PAI-1 levels and COVID-19 severity.
  • To determine if PAI-1 can serve as a prognostic biomarker for severe COVID-19 outcomes.

Main Methods:

  • Single-center retrospective chart review of 113 hospitalized COVID-19 patients.
  • Plasma PAI-1 levels measured via ELISA.
  • Comparison of PAI-1 levels between severe (ventilator use/death) and non-severe COVID-19 groups.

Main Results:

  • A significant positive correlation was observed between age and PAI-1 levels.
  • Elevated PAI-1 levels were noted in patients with hyperlipidemia.
  • PAI-1 levels were significantly higher in patients requiring mechanical ventilation or who died compared to others.

Conclusions:

  • High plasma PAI-1 levels are significantly associated with severe COVID-19.
  • PAI-1 may function as a valuable biological marker for predicting severe COVID-19 and adverse outcomes.

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