In order to further characterize the IFN response in DM skin, we performed QRT-PCR analysis of the selected IFNs, including IFN-alpha (subtypes 1,2,4,6,8,14 and 21), IFN-beta, IFN-kappa, IFN-omega, and IFN-gamma. The gene discussed is IFNA1; the disease is dermatomyositis.