E: Immunofluorescence of hippocampal neurons transduced with GFP, GFP-TDP-25 wild-type or mutant and treated with MG132 (10 µM, 14h, DIV5+8). Representative images of GFP-TDP-25 inclusions and diffuse cytoplasmic staining. Automated quantification of GFP intensity normalized to the number of DAPI stained nuclei (omitted here for clarity) in MG132 treated cells compared to DMSO control. Counterstain to label the neuronal cytoskeleton (MAP2). Scale bar = 10 µm. Box plot as in Fig. 3C. GFP (1.23 ± 0.393, n=5 independent experiments) vs GFP-TDP-25 wt (2.11 ± 0.804, n=5) vs GFP-TDP-25 mut (2.36 ± 1.16, n=5): H(1)=7.34, df=2, p=0.02548, η²[H]=0.445, Kruskal-Wallis test. GFP vs GFP-TDP-25 wt: *p=0.048, GFP vs GFP-TDP-25 mut: *p=0.048, GFP-TDP-25 wt vs GFP-TDP-25 mut: p=0.690, Pairwise Wilcoxon Rank Sum Tests with Benjamini-Hochberg correction. 