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Early α-Synuclein Pathology Induces Neuroinflammation and Decreases Topoisomerase IIβ Expression in A53T Mice
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Early α-Synuclein Pathology Induces Neuroinflammation and Decreases Topoisomerase IIβ Expression in A53T Mice
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Journal Article
Early α-Synuclein Pathology Induces Neuroinflammation and Decreases Topoisomerase IIβ Expression in A53T Mice
2025
Overview
Neuroinflammation in the pathogenesis of neurodegenerative diseases is still a subject of discussion, as it might be either the cause or the result of neurodegeneration. Misfolded or improperly aggregated α-synuclein in Parkinson’s Disease, can cause inflammatory responses, indicating a mechanistic relationship between α-synuclein pathology and neuroinflammation. The aim of this study was to investigate the role of DNA topoisomerase IIβ, the key player of DNA topology, in the neuroinflammation process in an age-dependent transgenic Parkinson’s Disease mouse model overexpressing the A53T mutant α-synuclein. In this study, transgenic and control mice were bred in three age groups as early (3 months), mid (8 months), and late (12 months) disease stages. Behavioral experiments were carried out to compare the age-related cognitive and motor coordination functions. Cytokine levels in the serum and protein expression levels in the dissected brain were analyzed by both western blot and immunofluorescence staining. A decline was observed in the cognitive and motor coordination functions depending on age. Disease-related markers at protein level appeared even in the early stage, and accordingly, a significant increase was observed in inflammatory markers and cytokine levels compared to control. DNA Topoisomerase IIβ and Nurr1 levels decreased in transgenic mice, especially more dramatically in the early stage. The combined effect of reduced Nurr1 and DNA Topoisomerase IIβ, along with increased inflammation, may provide a better understanding of the pathogenesis of Parkinson’s Disease at early-stage and requires for further investigation of the potential alterations in topo IIβ as an intervention strategy for this disease.
Publisher
Springer US,Springer Nature B.V
Subject
/ alpha-Synuclein - metabolism
/ Animals
/ Biomedical and Life Sciences
/ Brain
/ Disease
/ DNA
/ DNA Topoisomerases, Type II - biosynthesis
/ DNA Topoisomerases, Type II - metabolism
/ Mice
/ Neuroinflammatory Diseases - metabolism
/ Neuroinflammatory Diseases - pathology
/ Nuclear Receptor Subfamily 4, Group A, Member 2 - metabolism
/ Parkinson Disease - genetics
/ Parkinson Disease - metabolism
/ Parkinson Disease - pathology
/ Proteins
