Metalloproteinases and Their Tissue Inhibitors in Comparison between Different Chronic Pneumopathies in the Horse.
Abstract: In chronic respiratory disease, matrix metalloproteinases (MMPs) contribute to pathological tissue destruction when expressed in excess, while tissue inhibitors of metalloproteinases (TIMPs) counteract MMPs with overexpression leading to fibrosis formation. They may be out of balance in equine pneumopathies and serve as biomarkers of pulmonary inflammation. We hypothesized that MMPs and TIMPs correlate to clinical findings and bronchoalveolar lavage fluid cytology in different equine chronic pneumopathies. Using a scoring system, 61 horses were classified controls as free of respiratory disease (n = 15), recurrent airway obstruction (RAO, n = 17), inflammatory airway disease (IAD, n = 18), or chronic interstitial pneumopathy (CIP, n = 11). Zymography and equine MMP and TIMP assays were used to detect MMP-2, MMP-8, MMP-9 as well as TIMP-1, and TIMP-2 in BALF supernatant. MMP-2, TIMP-1, and TIMP-2 concentrations were significantly increased in RAO and IAD compared to controls. MMP-9 concentration and MMP-8 activity evaluated by fluorimetry were significantly increased in RAO, IAD, and CIP. These results were confirmed by zymography for MMP-2 and MMP-9 activity in 52 horses. In conclusion, MMPs and TIMPs correlate well with clinical and cytologic findings. These findings support the usefulness of MMPs, TIMPs, and their ratios to evaluate the severity of respiratory disease and may help to identify subclinical cases.
Publication Date: 2015-12-03 PubMed ID: 26770019PubMed Central: PMC4681803DOI: 10.1155/2015/569512Google Scholar: Lookup
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- Comparative Study
- Journal Article
- Asthma
- Biomarkers
- Bronchi
- Bronchoalveolar Lavage
- Chronic Obstructive Pulmonary Disease
- Clinical Findings
- Clinical Pathology
- Cytology
- Equine Diseases
- Equine Health
- Horses
- Inflammation
- Lung Health
- Pathogenesis
- Pneumonia
- Pulmonary Health
- Recurrent Airway Obstruction
- Respiratory Disease
- Veterinary Medicine
- Veterinary Research
Summary
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This research explores the relationship between enzymes known as matrix metalloproteinases (MMPs) and their inhibitors, tissue inhibitors of metalloproteinases (TIMPs), in various equine chronic respiratory diseases. The study discovered that the balance between MMPs and TIMPs could be used to evaluate the severity of these diseases.
Research Background
- Chronic respiratory diseases involve pathological tissue destruction, which is further enhanced by an excess of matrix metalloproteinases (MMPs).
- On the other hand, tissue inhibitors of metalloproteinases (TIMPs) can counteract the effects of MMPs, but their overexpression may lead to the production of fibrosis.
- In horses suffering from pneumopathies, or lung diseases, an imbalance between MMPs and TIMPs could occur and be used as markers for lung inflammation.
Study Hypotheses and Methodology
- The study hypothesized that the occurrence of MMPs and TIMPs could correlate with clinical findings and the cytology of bronchoalveolar lavage fluid in horses affected by different chronic pneumopathies.
- For the study, 61 horses were scored and divided into groups: those without respiratory disease (controls), those with recurrent airway obstruction (RAO), inflammatory airway disease (IAD), and chronic interstitial pneumopathy (CIP).
- The study used zymography and equine MMP and TIMP assays to detect the MMP-2, MMP-8, and MMP-9 enzymes, as well as the TIMP-1 and TIMP-2 inhibitors in the bronchoalveolar lavage fluid (a fluid collected from the lungs) supernatant.
Study Findings
- The study discovered that concentrations of MMP-2, TIMP-1, and TIMP-2 were significantly elevated in horses with RAO and IAD compared to the control group.
- Also, MMP-9 concentration and MMP-8 activity were notably higher in the RAO, IAD, and CIP groups.
- Horses with RAO, IAD, and CIP also showed higher activity of MMP-2 and MMP-9, which was confirmed using zymography on 52 of the horses.
Conclusion and Uses
- The research concluded that there is a strong correlation between the levels of MMPs and TIMPs and the clinical and cytologic findings in horses with chronic respiratory diseases.
- The study suggests that MMPs, TIMPs, and their ratios could be useful in assessing the severity of respiratory disease in horses, and may even help in identifying subclinical cases, i.e., cases where symptoms are not yet present or are too mild to be detected using normal examination methods.
Cite This Article
APA
Barton AK, Shety T, Bondzio A, Einspanier R, Gehlen H.
(2015).
Metalloproteinases and Their Tissue Inhibitors in Comparison between Different Chronic Pneumopathies in the Horse.
Mediators Inflamm, 2015, 569512.
https://doi.org/10.1155/2015/569512 Publication
Researcher Affiliations
- Equine Clinic, Veterinary Faculty, Freie Universitaet Berlin, Oertzenweg 19b, 14163 Berlin, Germany.
- Equine Clinic, Veterinary Faculty, Freie Universitaet Berlin, Oertzenweg 19b, 14163 Berlin, Germany.
- Institute of Veterinary Biochemistry, Veterinary Faculty, Freie Universitaet Berlin, Oertzenweg 19b, 14163 Berlin, Germany.
- Institute of Veterinary Biochemistry, Veterinary Faculty, Freie Universitaet Berlin, Oertzenweg 19b, 14163 Berlin, Germany.
- Equine Clinic, Veterinary Faculty, Freie Universitaet Berlin, Oertzenweg 19b, 14163 Berlin, Germany.
MeSH Terms
- Animals
- Bronchoalveolar Lavage Fluid / cytology
- Chronic Disease
- Enzyme-Linked Immunosorbent Assay
- Horse Diseases / metabolism
- Horses
- Lung / physiopathology
- Lung Diseases / metabolism
- Lung Diseases / veterinary
- Matrix Metalloproteinases / metabolism
- Severity of Illness Index
- Tissue Inhibitor of Metalloproteinases / analysis
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