Sustained Expression of Neuritin mRNA After Repeated Electroconvulsive Stimulations in the Rat Hippocampal Formation

In the present study, we compared the expression patterns of neuritin mRNA in the dentate gyrus of hippocampal formation following single (1×ECS) or repeated elctroconvulsive seizures (8×ECS) treatments to the rat. The expression of neuritin mRNA was transiently increased, and returned to basal level within 12 hours after 1×ECS. Whereas initial induction of neuritin mRNA was similarly seen, these increased mRNA level was maintained for 24 hours in 8×ECS group. In contrast, induction profile of BDNF was similar following 1× and 8×ECS. These results suggest that regulation of neuritin expression may be plastically changed by repeated ECS treatment.