Inactivation of astroglial connexin functions hinders venlafaxine-induced antidepressant-like effects in the corticosterone mouse model of depression. Emotionality z-score was calculated based on a comprehensive battery of behavioral test ran at Week 18 (A,B) and Week 23 (C,D). A z-score >0 indicates a depressive-like state, whereas a score <0 indicates an antidepressant-like state. On Week 18 (A), an individual was considered as “responder to VENLA” when its z-score was <50% of the mean value of the CORT group (B, green dots). On Week 23 (C), after VENLA withdrawal, an individual was considered as “experiencing relapse” if its score was higher than the mean value of the CORT group (D, green dots). Asterisks indicate statistical significance on raw data: ** p < 0.01 and *** p < 0.005: statistically different from VEH group. Fisher’s exact test: ### p < 0.001: statistically different as indicated.