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. 2024 Oct 2;16(11):2882–2917. doi: 10.1038/s44321-024-00148-5

Figure 3. Intracisterna magna (ICM) delivery of AAV9/hAP4B1 shows greater transgene expression and the restoration of the AP-4 complex in the CNS compared with intravenous (IV) delivery in a Ap4b1-KO mouse model.

Figure 3

(A) qPCR of total genomic DNA extracted from both peripheral and CNS tissues showing viral distribution of treated mice through ICM or IV delivery; cerebrum, spinal cord, cerebellum, heart, and liver. (BF) RT-qPCR of total RNA extracted from CNS (cerebrum; cerebellum; spinal cord) and peripheral tissues (heart; liver) hAP4B1 mRNA expression in ICM delivery treated mice is elevated in the cerebrum, cerebellum, spinal cord compared to IV delivery. (G) Western blot detection of Ap4e1 showed a partial rescue of the Ap4e1 protein in the cerebrum ICM delivery, and no rescue with IV delivery. (H) Relative expression analysis displayed Ap4e1 was significantly increased in the cerebrum with ICM treatment. (I) Western blot detection of Ap4e1 showed a partial rescue of the Ap4e1 protein in the spinal cord ICM delivery, and no rescue with IV delivery. (J) Relative expression analysis displayed Ap4e1 was significantly increased in the spinal cord with ICM treatment. (K) Western blot detection of Ap4e1 showed a partial rescue of the Ap4e1 protein in the cerebellum ICM delivery, and no rescue with IV delivery. (L) Relative expression analysis revealed Ap4e1 was significantly increased in the cerebellum with ICM treatment. All data are presented as mean ± SEM, n = 3 mice. (BF) were analysed via a one-way ANOVA with Tukey’s multiple comparisons test. (H), (J) and (L) were analysed via unpaired t-test. Stars indicate p ≤ 0.05 (*); p ≤ 0.01 (**); p ≤ 0.001 (***); ns = not significant. (B), p = 0.0001; (C), p = 0.0206; (D), p = 0.0312; (H), p = 0.0111; (J), p = 0.0049; (L), p = 0.0207. Source data are available online for this figure.