Journal: bioRxiv
Article Title: In vivo discovery of blood-brain barrier opening small molecules with FishNAP
doi: 10.64898/2026.03.18.712473
Figure Lengend Snippet: A . Schematic of the FishNAP assay, with up to seven larvae per well. Overall activity is monitored using Daniovision for 1 hour after loperamide exposure; increased BBB permeability leads to reduced locomotor activity. B . Leaky 3 dpf larvae are significantly sedated compared to 5 and 7 dpf fish, as previously reported (O’Brown, 2019). C . spock1 mutants show significantly reduced activity compared to wild-type (WT) controls at 7 dpf using FishNAP. D . Workflow schematic for assessing BBB permeability in cldn5a crispant fish. E–H . Tracer leakage assays using 1 kDa NHS ester (E, turquoise) and 10 kDa Dextran (F, gold) reveal significantly increased 1 kDa NHS tracer permeability outside of the kdrl:mCherry + vasculature (magenta) in cldn5a crispants vs. uninjected controls (G), but no significant change in 10 kDa Dextran permeability (H). I . FishNAP also detects increased BBB permeability in cldn5a crispants relative to uninjected controls. The slowest fish (red outlines) show greater than 95% cldn5a knockdown. ** p<0.01, *** p<0.001, **** p<0.0001 by one-way ANOVA (B and C) and Welches t-test (G-I). Scale bar represents 50 µm.
Article Snippet: The plate was then placed in a Daniovision recording chamber (Noldus).
Techniques: Activity Assay, Permeability, Knockdown