RGS2 and post-traumatic stress disorder: Of note, the 3’ UTR single nucleotide polymorphism rs4606 in RGS2 was associated with post-traumatic stress disorder under conditions of lifetime exposure to a potentially traumatic event and low social support (Amstadter et al., 2009a), suicidal ideation (Amstadter et al., 2009b), and depressive disorders after childhood adversity (Asselmann et al., 2018).