Boston, Mass. — Researchers from Schepens Eye Research Institute of Massachusetts Eye and Ear have uncovered two factors responsible for the chronic, lifelong nature of autoimmune disorders, which tend to “flare up” intermittently in affected patients. These two factors are cell-signaling proteins called cytokines—specifically Interleukin-7 and -15 (IL-7 and IL-15)—that are secreted by cells of the immune system and help modulate memory Th17 cells, a subset of T cells which are known to contribute to autoimmune disorders. Until now, it was unclear how Th17 cells...