TGFB1 and depressive disorder: Median concentrations of the anti-inflammatory cytokine TGF-β were highest in the Depression group (1.78 log pg/mL), followed by significantly lower and mostly undetectable values for Control (0.26 log pg/mL), Abuse (0.26 log pg/mL) and Abuse+Depression groups (0.26 log pg/mL) (p<0.01) (Table 2A).