ITGAM and post-traumatic stress disorder: In a series of preclinical experiments employing the chronic subordinate colony housing (CSC) paradigm as an acknowledged model for social stress-associated posttraumatic stress disorder (PTSD) in male mice15,16 we could show that particularly CD11b+Ly6G+Ly6C+ polymorphonuclear (PMN)-myeloid-derived suppressor cells (MDSCs) play a critical role in psychosocial stress-induced GC resistance17–20.