Vulnerability of glia and vessels of rat substantia nigra in rotenone Parkinson model

Ultrastructural Pathology
Sanaa A M ElgayarRaghda Elsherif

Abstract

Astrocytes have been implicated as potentially exerting both neurotoxic and neuroprotective activities in Parkinson's disease (PD). Whether glial cells negatively impact the neuron integrity remains to be determined. We aimed to assess the vulnerability of glia and vessels in rat substantia nigra in a rotenone PD model. Twenty adult male albino rats were divided into two equal groups: vehicle-control group (received dimethylsulfoxide + polyethylene glycol (PEG)-300, 1:1 v/v) and rotenone-treated group (received six doses of rotenone, 1.5 mg/kg/48 h s.c.). Using histological, ultrastructural, biochemical, and morphometric techniques, astrocytes, microglia, vessels, and total antioxidant capacity have been assessed. The rotenone-treated group revealed an increase in the number of astrocytes compared to the control, conformational changes of the immature form, disruption of the outer mitochondrial membrane, and no increase in glial filaments. Dark microglia appeared in close vicinity of blood capillaries. The blood capillaries displayed an increase in number compared to the control, degenerated apoptotic endothelium, and pericytes and an increase in string vessels. The total antioxidant level significantly increased in rotenone-tr...Continue Reading

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Citations

Jun 21, 2019·The Cerebellum·Ana Paula Bergamo AraujoFlávia Carvalho Alcantara Gomes
Mar 30, 2019·Therapeutic Advances in Neurological Disorders·Laura PelizzariFrancesca Baglio
May 24, 2020·ASN Neuro·Marie-Kim St-PierreMarie-Ève Tremblay
Feb 16, 2021·Neurochemistry International·Katherine PicardMarie-Ève Tremblay
Mar 7, 2021·International Journal of Molecular Sciences·Natália Ferreira MendesEliana Pereira de Araújo
Apr 1, 2021·NPJ Parkinson's Disease·Paula Ramos-GonzalezFabio Cavaliere
May 21, 2021·Drug and Chemical Toxicology·Omamuyovwi M IjomoneAzubuike P Ebokaiwe
Sep 23, 2021·Biological Reviews of the Cambridge Philosophical Society·Marcus Augusto-OliveiraAlexei Verkhratsky

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