Cycloastragenol inhibits Aβ<sub>1–42</sub>-induced blood-brain barrier disruption and enhances soluble Aβ efflux <i>in vitro</i>
Min-Ye Huang, Guran Yu
Abstract
This study aimed to evaluate the effect Cycloastragenol (CAG), a triterpenoid saponin isolated from the Radix astragali, on Aβ-induced BBB damage. An immortalized endothelial cell line (bEnd.3) was employed to mimic a BBB. The Western blot, TUNEL staining, Flow cytometric analysis and Enzyme-linked immunosorbent assay were performed. The present results showed that CAG (10, 50, 75 μM) can alleviate oligomer Aβ1–42 induced bEnd.3 cell apoptosis and increase tight junction scaffold proteins expression. The result also indicated that CAG increased soluble Aβ efflux across BBB via upregulation of the P-gp and downregulation of RAGE expression.
Topics & Concepts
Downregulation and upregulationEffluxWestern blotApoptosisTUNEL assayFlow cytometryIn vitroChemistryMolecular biologyCell cultureCell biologyBiologyBiochemistryGeneticsGeneNatural product bioactivities and synthesisConnexins and lens biologyDrug Transport and Resistance Mechanisms