1. Chronic Administration of Scopolamine Increased GSK3βP9, Beta Secretase, Amyloid Beta, and Oxidative Stress in the Hippocampus of Wistar Rats
- Author
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José Correa-Basurto, Iohanan Daniel García-Marín, Maricarmen Hernández-Rodríguez, I. Arciniega-Martinez, and Martha Cecilia Rosales-Hernández
- Subjects
Male ,0301 basic medicine ,medicine.medical_specialty ,Amyloid beta ,Scopolamine ,Tau protein ,Neuroscience (miscellaneous) ,Hyperphosphorylation ,Hippocampus ,medicine.disease_cause ,Models, Biological ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,0302 clinical medicine ,GSK-3 ,Internal medicine ,Glial Fibrillary Acidic Protein ,medicine ,Animals ,Phosphorylation ,Rats, Wistar ,Amyloid beta-Peptides ,Glycogen Synthase Kinase 3 beta ,biology ,Chemistry ,medicine.disease ,Oxidative Stress ,030104 developmental biology ,Endocrinology ,Neurology ,biology.protein ,Amyloid Precursor Protein Secretases ,Alzheimer's disease ,Amyloid precursor protein secretase ,030217 neurology & neurosurgery ,Oxidative stress - Abstract
The increase of amyloid beta (Aβ) release and hyperphosphorylation of Tau protein represents the main events related to Alzheimer's disease (AD). Furthermore, the sporadic type represents the most common form of AD. Therefore, the establishment of a non-transgenic animal model that resembles the characteristics of the disease is of particular importance. Scopolamine has been linked to increases in both Aβ production and oxidative stress in rat and mice brains. Thus, the purpose of the present work was to identify changes in biomarkers that are related to AD after chronic administration of scopolamine (2 mg/kg i.p., during 6 and 12 weeks) to male Wistar rats. The results showed increased Aβ deposition at rat hippocampus which could be due to an increase of β-site amyloid-β-protein precursor cleaving enzyme 1 (BACE1) expression and activity. These findings could be related to the increase of glycogen synthase kinase 3 phosphorylated (GSK3βP9) expression. Finally, the establishment of a state of oxidative stress in groups treated with scopolamine was demonstrated by an increase in free radical content and MDA levels. The present study facilitates our understanding of the changes that occur in biomolecules related to AD in Wistar rats after the chronic administration of scopolamine.
- Published
- 2020