Micropunch-dissected VMN tissue was obtained from groups of estradiol (E) – implanted ovariectomized (OVX) female and testes-intact male rats pretreated by LV administration of MPP, PHTPP, or vehicle prior to sc insulin (INS) injection for Western blot analysis of glutamate decarboxylase65/67 (GAD65/67) [Panel A; female data at left, male data at right], neuronal nitric oxide synthase (nNOS) [Panel B; female data at left, male data at right], steroidogenic factor-1 (SF-1) [Panel C; female data at left, male data at right], and brain-derived neurotrophic factor (BDNF) [Panel D; female data at left, male data at right] expression. Data depict for each sex mean normalized protein optical density (O.D.) values ± S.E.M. for vehicle-pretreated animals injected sc with vehicle-(solid white bars; n=6) or INS (solid gray bars; n=6) or INS-injected rats pretreated with MPP (diagonal-striped gray bars; n=6) or PHTPP (cross-hatched gray bars; n=6). *p<0.05; **p<0.01; **p<0.001.