Researchers at the Medical University of Vienna have taken a closer look at a previously largely unknown component of the immune system: the protein molecule TRAT1 (T Cell Receptor Associated Transmembrane Adaptor 1) plays a central role in how so-called T helper cells (a specialised subgroup of immune cells) distinguish between attack and self-control – an important mechanism for restraining inflammation and preventing autoimmune diseases. The findings have recently been published in the journal Cell Communication and Signaling.