PPP1R1B and schizophrenia: Thus, the present study aimed to investigate the effects of chronic social defeat on a variety of behavioral parameters, including the social interaction, EPM, and MWM tests, and the levels of dopaminergic markers (D2L, D2S, and total and p-DARPP-32) and proteins involved in intracellular trafficking in several brain regions of mice known to be affected in stress-related disorders such as anxiety and depressive disorders [31], and schizophrenia [32].