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자료유형
학술저널
저자정보
김보혜 (전남대학교) Poornima D. E. Weerasinghe-Mudiyanselage (전남대학교 의과대학 해부학교실) Mary Jasmin Ang (전남대학교 의과대학 해부학교실) 이정민 (전남대학교) 강소희 (전남대학교) 김종춘 (전남대학교) 김성호 (전남대학교) 김중선 (전남대학교) 정채용 (전남대학교) 신태균 (제주대학교) 문창종 (전남대학교)
저널정보
대한배뇨장애요실금학회 International Neurourology Journal International Neurourology Journal 제26권
발행연도
2022.11
수록면
94 - 105 (12page)
DOI
10.5213/inj.2244252.126

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Purpose: Parkinson disease (PD) is a progressive neurodegenerative disorder in which dopaminergic (DAergic) systems are destroyed (particularly in the nigrostriatal system), causing both motor and nonmotor symptoms. Hippocampal neuroplasti city is altered in PD animal models, resulting in nonmotor dysfunctions. However, little is known about the precise mecha nism underlying the hippocampal dysfunctions in PD. Methods: Striatal 6-hydroxydopamine (6-OHDA) infusions were performed unilaterally in adult Sprague Dawley rats. Both motor and nonmotor symptoms alongside the expression of tyrosine hydroxylase (TH) in the substantia nigra and striatum were confirmed in 6-OHDA-lesioned rats. The neuronal architecture in the hippocampus was analyzed by Golgi staining. Results: During the 7–8 weeks after infusion, the 6-OHDA-lesioned rats exhibited motor and nonmotor dysfunctions (espe cially anxiety/depression-like behaviors). Rats with unilateral 6-OHDA infusion displayed reduced TH+ immunoreactivity in the ipsilateral nigrostriatal pathway of the brain. Golgi staining revealed that striatal 6-OHDA infusion significantly decreased the dendritic complexity (i.e., number of crossing dendrites, total dendritic length, and branch points) in the ipsilateral hippo campal conus ammonis 1 (CA1) apical/basal and dentate gyrus (DG) subregions. Additionally, the dendritic spine density and morphology were significantly altered in the CA1 apical/basal and DG subregions following striatal 6-OHDA infusion. Howev er, alteration of microglial and astrocytic distributions did not occur in the hippocampus following striatal 6-OHDA infusion. Conclusions: The present study provides anatomical evidence that the structural plasticity in the hippocampus is altered in the late phase following striatal 6-OHDA infusion in rats, possibly as a result of the prolonged suppression of the DAergic sys tem, and independent of neuroinflammation.

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