Abstract
Proteomics was utilized to identify novel potential plasma biomarkers of exercise-induced muscle injury. Muscle injury was induced in nine human volunteers by eccentric upper extremity exercise. Liquid chromatography–mass spectrometry identified 30 peptides derived from nine proteins which showed significant change in abundance post-exercise. Four of these proteins, haemoglobin α chain, haemoglobin β chain, α1-antichymotrypsin (ACT) and plasma C-1 protease inhibitor (C1 Inh), met the criterion for inclusion based on changes in at least two distinct peptides. ACT and C1 Inh peptides peaked earlier post-exercise than creatine kinase, and thus appear to provide new information on muscle response to injury.
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