Serum concentrations of collagen degrading enzymes and their inhibitors after downhill running

• Published in: Scandinavian journal of medicine & science in sports Vol. 11; no. 1; pp. 9 - 15
• Main Authors: Koskinen, S. O. A., Höyhtyä, M., Turpeenniemi-Hujanen, T., Martikkala, V., Mäkinen, T. T., Oksa, J., Rintamäki, H., Löfberg, M., Somer, H., Takala, T. E. S.
• Format: Journal Article
• Language: English
• Published: Copenhagen Munksgaard International Publishers 01-02-2001; Blackwell
• Subjects: Adult; Biological and medical sciences; Collagenases - analysis; Creatine Kinase - analysis; Humans; Investigative techniques, diagnostic techniques (general aspects); Male; Matrix Metalloproteinase 2; Matrix Metalloproteinase Inhibitors; Medical sciences; Muscle, Skeletal - enzymology; Muscle, Skeletal - pathology; Muscular Dystrophies - enzymology; Muscular Dystrophies - pathology; Myositis - enzymology; Myositis - pathology; Osteoarticular system. Muscles; Pathology. Cytology. Biochemistry. Spectrometry. Miscellaneous investigative techniques; Rhabdomyolysis - enzymology; Rhabdomyolysis - pathology; Running - physiology; Temperature; Physical exercise; Physical training; Creatine kinase; Diseases of the osteoarticular system; Biological marker; Metalloendopeptidases; Athlete; Running locomotion; Slope; Adult; Serum; Human; Biochemical analysis; Cold; Enzyme; Transferases; Concentration; Striated muscle; Gelatinase B; Gelatinase A; Peptidases; Striated muscle disease; Collagen; Hydrolases; Lesion; Room temperature
• ISSN: 0905-7188; 1600-0838
• DOI: 10.1034/j.1600-0838.2001.011001009.x

In the present study the release of proteins degrading extracellular matrix compounds to circulation was measured after damaging exercise in humans. Muscle damage was induced by downhill running; furthermore, the exercise was performed at both cold temperature (5 °C) and room temperature (22 °C) to study also the possible effect of environmental temperature on serum concentrations of matrix metalloproteinases MMP‐2 and MMP‐9, tissue inhibitors of metalloproteinases TIMP‐1 and TIMP‐2, and MMP‐2/TIMP‐2 complex, and muscle damage monitored by serum creatine kinase measurements. Results were compared with those obtained from patients having rhabdomyolysis, myositis and Becker muscular dystrophy. The present study demonstrates an acute increase in serum concentrations of MMP‐9, TIMP‐1, and MMP‐2/TIMP‐2 complex, but no changes in serum MMP‐2 concentrations in response to eccentric exercise. Serum creatine kinase activity data suggest greater muscle damage after downhill running in a cold environment than at room temperature. The present observations about at most slight changes in serum MMP and TIMP concentrations and lack of their correlation to increased serum creatine kinase after exercise indicate that serum measurements of MMPs and TIMPs do not sensitively respond to exercise induced skeletal muscle damage and extracellular matrix regeneration. On the other hand, severe skeletal muscle damage, such as rhabdomyolysis, myositis and Becker muscular dystrophy, seemed to have an effect on serum MMP and TIMP concentrations.