Chemokines regulate the migration of infiltrating cells. Stressed or damaged muscle fibers secrete chemokines, which will attract inflammatory cells. The infiltrating cells will also secrete chemokines that attract even more cells, creating a loop. DC, dendritic cell; Th1, T helper 1.
Malmström et al. Arthritis Research & Therapy 2012 14:230 doi:10.1186/ar4116