Concentrations of stromal cell-derived factor-1 in serum, plasma, and synovial fluid of horses with osteochondral injury.

Objective: To determine whether stromal cell-derived factor-1 (SDF-1) concentrations in serum, plasma, and synovial fluid differed among untrained, race-trained, and osteochondral-injured Thoroughbred racehorses.

Animals: 22 racehorses without osteochondral injury and 37 racehorses with osteochondral injury.

Procedures: Horses without osteochondral injury were examined before and after 5 to 6 months of race training.