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Immunofluorescence of CD63, claudin-5, occludin and ZO1 expression. Magnification, ×400; n=3. *P<0.05, **P<0.01 and ***P<0.001 with a bar linking the groups with an asteris. CD, cluster of differentiation; ZO1, tight junction protein 1; Scu, Scutellarin; SE, Scu-treated exosomes; Hcy, homocysteine; CE, control-treated exosomes; Model, 2.5 mmol/l Hcy-induced rat brain microvascular endothelial cells.
