Phenotype and effector functions of muscle-infiltrating T cells. Perforin and granzyme B-positive cells are abundant in mononuclear cell infiltrates in affected muscle. Not only CD8+ but also CD4+CD28null T cells express these effector molecules. IFN-γ, interferon-gamma; Th1, T helper 1.
Malmström et al. Arthritis Research & Therapy 2012 14:230 doi:10.1186/ar4116