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Acta veterinaria Scandinavica1997; 38(1); 9-16; doi: 10.1186/BF03548503

Collagenolytic activity and its sensitivity to doxycycline inhibition in tracheal aspirates of horses with chronic obstructive pulmonary disease.

Abstract: The collagenolytic activity and its sensitivity to doxycycline inhibition in tracheal aspirates (TA) of horses with chronic obstructive pulmonary disease (COPD) was analyzed with SDS-PA gel electrophoresis (SDS-PAGE), using Type 1 collagen as the substrate. Both autoactive and total collagenase activities were significantly higher in TAs of horses with symptomatic COPD than in TAs of healthy horses. Doxycycline inhibition studies suggest that most of the TA collagenase is of the neutrophil type (MMP-8), but some is derived from other cells such as fibroblasts and monocyte/macrophages (MMP-1) and bacteria (bacterial collagenases). Drugs inhibiting collagenases in the respiratory tract might be worth a trial in the treatment of COPD in horses.
Publication Date: 1997-01-01 PubMed ID: 9129342PubMed Central: PMC8057019DOI: 10.1186/BF03548503Google Scholar: Lookup
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  • Journal Article
  • Research Support
  • Non-U.S. Gov't

Summary

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This research article investigates the activity of collagen-digesting enzymes in the respiratory tract of horses with chronic obstructive pulmonary disease (COPD) and their responsiveness to the drug doxycycline. The results suggest potential therapeutic benefits of drugs that inhibit these enzymes in treating equine COPD.

Collagenolytic Activity in Horses with COPD

  • This study focused on the activity of enzymes that degrade collagen (a protein that provides structure and strength to tissues) in the tracheal aspirates (TA) of horses with COPD. Using a lab technique known as SDS-PAGE gel electrophoresis, the researchers measured this collagenolytic activity in the respiratory tract mucus or fluid produced by horses with this lung disease.
  • The results showed that both automated and total collagenase (the specific enzyme that break down collagen) activity were significantly higher in horses suffering from symptomatic COPD than in healthy horses.

Sensitivity of Collagenolytic Activity to Doxycycline

  • Doxycycline, an antibiotic often used to treat bacterial infections, is also known to inhibit the activity of certain collagenases.
  • In this study, the team investigated how responsive the elevated collagenolytic activity in COPD-affected horses was to doxycycline treatment and found that doxycycline indeed effectively inhibited it.
  • The researchers were able to identify and suggest that most of the collagenase activity was due to a type of collagenase produced by neutrophils (a type of white blood cell), known as MMP-8.
  • However, they also found that some activity was due to collagenases derived from other cells such as fibroblasts (connective tissue cells), monocyte/macrophages (another type of white blood cell) and bacteria.

Potential Therapeutic Implications

  • Based on these findings, the researchers suggested that drugs that inhibit collagenases could potentially be useful in the treatment of COPD in horses.
  • The evidenced response to doxycycline suggests that this drug or other similar drugs could be an effective treatment alternative worth exploring further.

Cite This Article

APA
Koivunen AL, Maisi P, Konttinen YT, Prikk K, Sandholm M. (1997). Collagenolytic activity and its sensitivity to doxycycline inhibition in tracheal aspirates of horses with chronic obstructive pulmonary disease. Acta Vet Scand, 38(1), 9-16. https://doi.org/10.1186/BF03548503

Publication

ISSN: 0044-605X
NlmUniqueID: 0370400
Country: England
Language: English
Volume: 38
Issue: 1
Pages: 9-16

Researcher Affiliations

Koivunen, A L
  • Department of Clinical Veterinary Sciences, Faculty of Veterinary Medicine, University of Helsinki, Finland.
Maisi, P
    Konttinen, Y T
      Prikk, K
        Sandholm, M

          MeSH Terms

          • Animals
          • Collagen / metabolism
          • Collagenases / isolation & purification
          • Collagenases / metabolism
          • Doxycycline / pharmacology
          • Electrophoresis, Polyacrylamide Gel
          • Horse Diseases
          • Horses
          • Lung Diseases, Obstructive / enzymology
          • Lung Diseases, Obstructive / veterinary
          • Matrix Metalloproteinase Inhibitors
          • Mucous Membrane / enzymology
          • Suction
          • Trachea

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          Citations

          This article has been cited 6 times.
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            doi: 10.1155/2019/7845623pubmed: 31316303google scholar: lookup
          2. Barton AK, Gehlen H. Pulmonary Remodeling in Equine Asthma: What Do We Know about Mediators of Inflammation in the Horse?. Mediators Inflamm 2016;2016:5693205.
            doi: 10.1155/2016/5693205pubmed: 28053371google scholar: lookup
          3. Barton AK, Shety T, Bondzio A, Einspanier R, Gehlen H. Metalloproteinases and their inhibitors are influenced by inhalative glucocorticoid therapy in combination with environmental dust reduction in equine recurrent airway obstruction.. BMC Vet Res 2016 Dec 9;12(1):282.
            doi: 10.1186/s12917-016-0915-1pubmed: 27938355google scholar: lookup
          4. Barton AK, Shety T, Bondzio A, Einspanier R, Gehlen H. Metalloproteinases and Their Tissue Inhibitors in Comparison between Different Chronic Pneumopathies in the Horse.. Mediators Inflamm 2015;2015:569512.
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