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a Western-blot representative experiment for the expression of cofilin, phosphorylated (P)-cofilin, and GAPDH proteins, detected in SH-SY5Y cells after 1- or 24-h treatment with exendin-4 (EXE). b Densitometric analysis of the P-cofilin/cofilin ratio. * = p < 0.05 versus control untreated cells (C), one-way ANOVA test
