Semi-quantitative analysis of α-syn fluorescence (GFP) intensity in the small intestine of transgenic mice at different ages. Two-way ANOVA (F = 32.041, P < 0.001, in age; F = 24.110, P < 0.001, in location), followed by LSD post hoc test (***P < 0.005, 6 vs 9 months; ###
P < 0.005, 9 vs 24 months; +++
P < 0.005, 6 vs 24 months; •••
P < 0.005, Prox vs Dist; ×××
P < 0.005, Prox vs Mid.); error bars, standard error of the mean.