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Metalloproteinases and Their Tissue Inhibitors in Comparison between Different Chronic Pneumopathies in the Horse

Ann Kristin Barton1, Tarek Shety1, Angelika Bondzio2

  • 1Equine Clinic, Veterinary Faculty, Freie Universitaet Berlin, Oertzenweg 19b, 14163 Berlin, Germany.

Mediators of Inflammation
|January 16, 2016
PubMed

Insights

Matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) show altered levels in equine respiratory diseases. These biomarkers correlate with clinical and cytologic findings, aiding in disease severity assessment.

Area of Science:

  • Equine medicine
  • Pulmonary pathology
  • Biomarker discovery

Background:

  • Matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) are key regulators of tissue remodeling.
  • Imbalances in MMPs and TIMPs are implicated in chronic respiratory diseases, potentially serving as biomarkers.
  • Their role in equine pneumopathies requires further investigation to correlate with clinical and cytologic parameters.

Purpose of the Study:

  • To investigate the correlation between matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) with clinical and bronchoalveolar lavage fluid (BALF) cytologic findings in horses.
  • To evaluate MMPs and TIMPs as potential biomarkers for different equine chronic respiratory conditions.

Main Methods:

  • Sixty-one horses were categorized into control, recurrent airway obstruction (RAO), inflammatory airway disease (IAD), and chronic interstitial pneumopathy (CIP) groups.
  • Bronchoalveolar lavage fluid (BALF) supernatant was analyzed for MMP-2, MMP-8, MMP-9, TIMP-1, and TIMP-2 using specific assays and zymography.
  • Fluorimetry was used to evaluate MMP-8 activity.

Main Results:

  • MMP-2, TIMP-1, and TIMP-2 concentrations were elevated in RAO and IAD compared to controls.
  • MMP-9 concentration and MMP-8 activity were significantly increased in RAO, IAD, and CIP.
  • Zymography confirmed increased MMP-2 and MMP-9 activity in a subset of horses.

Conclusions:

  • MMPs and TIMPs levels correlate significantly with clinical signs and cytologic data in equine respiratory diseases.
  • These proteinases and their inhibitors are valuable for assessing disease severity and potentially identifying subclinical cases in horses.
  • MMP and TIMP profiling offers a promising approach for diagnosing and monitoring equine pulmonary conditions.

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