Changes in adult hippocampal cell proliferation and genesis have been largely implicated in depression and antidepressant action, though surprisingly, the underlying cell cycle mechanisms are largely undisclosed. Using both an <i>in vivo</i> unpredictable chronic mild stress (uCMS) rat model of depression and <i>in vitro</i> rat hippocampal-derived neurosphere culture approaches, we aimed to unravel the cell cy...