Early plasma matrix metalloproteinase profiles a novel pathway in pediatric acute respiratory distress syndrome

Matt S. Zinter, Kevin L. Delucchi, Michele Y. Kong, Benjamin E. Orwoll, Aaron S. Spicer, Michelle J. Lim, Mustafa F. Alkhouli, Anna E. Ratiu, Anne V. McKenzie, Patrick S. McQuillen, Christopher C. Dvorak, Carolyn S. Calfee, Michael A. Matthay, Anil Sapru

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


Rationale: MMPs (Matrix metalloproteinases) and their endogenous tissue inhibitors may contribute to lung injury through extracellular matrix degradation and modulation of inflammation and fibrosis. Objectives: To test for an association between MMP pathway proteins and inflammation, endothelial dysfunction, and clinical outcomes. Methods: We measured MMPs in plasma collected on acute respiratory distress syndrome (ARDS) Day 1 from 235 children at five hospitals between 2008 and 2017. We used latent class analysis to identify patients with distinct MMP profiles and then associated those profiles with markers of inflammation (IL-1RA, -6, -8, -10, and -18; macrophage inflammatory protein-1a and -1b; tumor necrosis factor-a and -R2), endothelial injury (angiopoietin-2, von Willebrand factor, soluble thrombomodulin), impaired oxygenation (Pa O2 /FI O2 [P/F] ratio, oxygenation index), morbidity, and mortality. Measurements and Main Results: In geographically distinct derivation and validation cohorts, approximately one-third of patients demonstrated an MMP profile characterized by elevated MMP-1, -2, -3, -7, and -8 and tissue inhibitor of metalloproteinase-1 and -2; and depressed active and total MMP-9. This MMP profile was associated with multiple markers of inflammation, endothelial injury, and impaired oxygenation on Day 1 of ARDS, and conferred fourfold increased odds of mortality or severe morbidity independent of the P/F ratio and other confounders (95% confidence interval, 2.1–7.6; P, 0.001). Logistic regression using both the P/F ratio and MMP profiles was superior to the P/F ratio alone in prognosticating mortality or severe morbidity (area under the receiver operating characteristic curve, 0.75; 95% confidence interval, 0.68–0.82 vs. area under the receiver operating characteristic curve, 0.66; 95% confidence interval, 0.58–0.73; P = 0.009). Conclusions: Pediatric patients with ARDS have specific plasma MMP profiles associated with inflammation, endothelial injury, morbidity, and mortality. MMPs may play a role in the pathobiology of children with ARDS.

Original languageEnglish (US)
Pages (from-to)181-189
Number of pages9
JournalAmerican journal of respiratory and critical care medicine
Issue number2
StatePublished - Jan 15 2019
Externally publishedYes


  • Matrix metalloproteinases
  • Pediatric acute lung injury
  • Pediatric acute respiratory distress syndrome
  • Pediatric intensive care unit
  • Tissue inhibitor of metalloproteinases

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine
  • Critical Care and Intensive Care Medicine


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