In DM compared to HC:• CD14+ macrophages were the most abundant cell populations• Followed by myeloid dendritic cells (major producers of IFNß)• And followed by CD14+ CD16+ macrophages. STING production by macrophages has been described as an IFN stimulator.Regarding T cells: predominance of memory T cells (CCR7+ CD45RA-). Here, IFNA1 is linked to dermatomyositis.