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

Document Type : Original Article

Authors

1 Department of Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran

2 Division of Neuro-Cognitive Sciences, Psychiatry and Behavioural Sciences Research center, Mashhad University of Medical Sciences, Mashhad, Iran

3 Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

4 Department of Physiology, School of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran

5 Division of Clinical Laboratory Science, Radcliffe Department of Medicine, University of Oxford, Oxford, UK

6 Neuroscience Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

7 Department of Neuroscience, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran

8 Department of Biology, Faculty of Sciences, Islamic Azad University-Mashhad Branch, Mashhad, Iran

Abstract

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 μg/2 μl (P1) and 2 μg/2 μl (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 P1 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.

Keywords

References

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Iranian Journal of Basic Medical Sciences
Volume 24, Issue 12
December 2021
Pages 1709-1716

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