cntnap2ab Mutants Display Nighttime Hyperactivity (A) Experimental setup (Prober et al., 2006 and Rihel et al., 2010). (B) Locomotor activity of cntnap2aΔ25/Δ25cntnap2bΔ7/Δ7 (cntnap2ab, red) and wild-type (WT; blue) sibling-matched larvae over 72 hr. Hyperactivity in mutants worsens on successive nights (arrows). The magnified activity profile on night 6 is shown. (C) Average locomotor activity of cntnap2ab versus wild-type. p = 0.00012 (one-way ANOVA, comparing all genotypes on all nights); p = 0.0193, 0.0236, and 0.0073, nights 4, 5, and 6, respectively. (D) Hierarchical clustering of the cntnap2ab behavioral fingerprint (red arrow) compared with the fingerprints of wild-type larvae exposed to a panel of 550 psychoactive agents from 4–6 dpf ( Rihel et al., 2010). Each rectangle in the clustergram represents the Z score, or the average value in SDs relative to the behavioral profiles of wild-type exposed to DMSO alone (magenta, higher than DMSO; cyan, lower than DMSO). The cntnap2ab profile correlates with agents that induce nighttime arousal (“Correlating Drugs”). (E) A magnified section of the clustergram, highlighting compounds that correlate with the cntnap2ab mutant behavioral fingerprint.
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