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Progelatinase B/matrix metalloproteinase-9 proenzyme as a marker of pleural inflammation

Jaromír Kotyza1, Milos Pesek, Petr Puzman

  • 1Institute of Biochemistry, Medical Faculty in Pilsen, Charles University, The Czech Republic. jaromir.kotyza@lfp.cuni.cz

Experimental Lung Research
|June 19, 2004
PubMed

Insights

Matrix metalloproteinase-9 proenzyme (proMMP-9) is a novel early indicator of acute inflammation in the pleural space. Its levels rise significantly after interventions, correlating with interleukin-6 and neutrophil counts.

Area of Science:

  • Pulmonary Medicine
  • Biochemistry
  • Inflammation Research

Background:

  • Previous studies indicated elevated matrix metalloproteinase-9 proenzyme (proMMP-9) in pleural effusions.
  • High proMMP-9 levels were predominantly observed in parainfectious exudates.

Purpose of the Study:

  • To confirm the etiological association of proMMP-9 with inflammation.
  • To investigate the time course of proMMP-9 release during a local inflammatory reaction in the pleural space.
  • To compare proMMP-9 levels with established proinflammatory markers.

Main Methods:

  • ProMMP-9 was measured in pleural fluids of patients undergoing talc pleurodesis or explorative thoracoscopy.
  • Measurements were taken before and at various time intervals after the intervention.
  • ProMMP-9 values were compared with interleukin-6 (IL-6), C-reactive protein (CRP), and leukocyte counts.

Main Results:

  • ProMMP-9 levels increased within hours, peaking 16-48 hours post-intervention (mean 14.8-fold increase).
  • ProMMP-9 values showed significant positive correlations with IL-6 levels (r=.79) and neutrophil counts (r=.75).

Conclusions:

  • ProMMP-9 serves as a novel early indicator of acute host response in the pleural space.
  • ProMMP-9 complements traditional proinflammatory markers for monitoring pleural inflammation.

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