VIPR2 and psychiatric disorder: More recently, pathological implications of VIPR2 have been shown in psychiatric disorders in humans, such as schizophrenia (Levinson et al., 2011; Vacic et al., 2011; Yuan et al., 2014; Li et al., 2016), autism spectrum disorder (ASD) (Vacic et al., 2011; Firouzabadi et al., 2017), depression (Soria et al., 2010), and attention deficit/hyperactivity disorder (Wilmot et al., 2016).