This volume focuses on various aspects of interleukin-27 (IL-27), especially its potential for clinical applications. The authors discuss the downstream signaling from the IL-27 receptor and its molecular targets in immune cells including Th1, Th2, Th17, Treg, Tr1, Tfh, B cells, DCs and macrophages. The inhibition of Th17 cells by IL-27 is vital for the maintenance of the feto-maternal tolerance and the prevention of lupus, multiple sclerosis, autoimmune uveitis, immune thrombocytopenia and atherosclerosis. However, the same inhibitory capabilities compromise the immune response to...