Effects of prolactin on movement disorders and APOE, GFAP, and PRL receptor gene expression following intracerebral hemorrhage in rats

Objective(s): Intracerebral hemorrhage (ICH) occurs mostly in the striatum. In ICH, blood prolactin level increases 3-fold. The effects of intracerebroventricular injection (ICV) of prolactin on motor disorders will be investigated. Materials and Methods: This study was performed on 32 male Wistar rats in 4 groups: sham, ICH, and prolactin with 1 mu g/2 mu l (P1) and 2 mu g/2 mu l (P2) doses. Results: The weight of animals on days 1 (P<0.01), 3, and 7 (P<0.05) in the sham and P2 groups increased compared with the ICH group. Neurological Deficit Score (NDS) in ICH and P1 groups decreased, and increased compared with sham and ICH groups (P<0.001), respectively. NDS in the P1 group increased compared with the P2 group on days 1 (P<0.0 5), 3, and 7 (P<0.001). The duration time of rotarod in ICH and P1 groups decreased and increased compared with sham and ICH groups (P<0.001), respectively. The duration time of rotarod in the I'l group on days 3 and 7 increased compared with the P2 group (P<0.001). Travel distance in days 1(P<0.01), 3(P<0.001), and 7(P<0.01) decreased in the ICH group. Prolactin receptor (PRL receptor) expression in ICH, P1, and P2 groups increased compared with sham and ICH groups (P<0.001). Glial fibrillary acidic protein (GFAP) expression (P<0.001) and apolipoprotein E (APOE) (P<0.01) expression in the ICH group increased compared with the sham group. GFAP and APOE expression in the P1 group increased compared with the ICH group (P<0.001). APOE expression in the P1 group increased compared with the P2 group (P<0.001). Conclusion: According to the results, prolactin reduces movement disorders.