Project description:Single-nuclei RNA sequencing analysis conducted at 6 months old from a WT mouse brain cortex, following Intrathecal(IT) injection of AAV9/JeT-hSLC6A1 vector at PND10.
Project description:Inherited retinal disorders (IRD) have become a primary focus of gene therapy research since the success of AAV-based therapeutics (voretigene neparvovec-rzyl) for Leber congenital amaurosis type 2 (LCA2). Dozens of monogenic IRDs could be potentially treated with a similar approach using adeno-associated virus (AAV) to transfer a functional gene into the retina. Here, we present the results of design, production and in vitro testing of the AAV serotype 9 (AAV9) vector carrying the codon-optimized (co) copy of aryl hydrocarbon receptor interacting protein like-1 (AIPL1) as a possible treatment for LCA4. The pAAV-AIPL1co was able to successfully transduce retinal pigment epithelium cells (ARPE-19) and initiate expression of human AIPL1. Intriguingly, cells transduced with AAV9-AIPL1co showed much less antiviral response than AAV9-AIPL1wt (wild type AIPL1 ) transduced. RNA-sequencing (RNA-seq) analysis of trans-differentiated ARPE-19 cells transduced with AAV9-AIPL1co demonstrated the significant differences in expression of genes involved in innate immune response. In contrast, AAV9-AIPL1wt induced prominent activation of multiple interferon-stimulated genes. The key part of possible regulatory molecular mechanism is activation of dsRNA-responsive antiviral oligoadenylate synthetases, and significant increase in level of histone coding genes’ transcripts overrepresented in RNA-seq data (i.e. H1, H2A, H2B, H3 and H4). The RNA-seq data suggests that AAV9-AIPL1co exhibiting less immunogenicity than AAV9-AIPL1wt can be used for potency testing using relevant animal models to develop future therapeutics for LCA4.
Project description:In this work we have induced meningeal lymphatic ablation by decreasing the circulating levels of VEGF-C and -D (VEGF-C/D trap), via injection of an AAV9 expressing domains 1 to 3 of murine VEGFR3 coupled to an Ig domain (VEGF-C/D trap). Control mice were injected with an AAV9 expressing domains 4 to 7 of murine VEGFR3 coupled to an Ig domain (controls). 5 weeks upon the initial injections, animals were perfused, and the forebrain tissue was collected and processed for single-cell RNA sequencing (10x Genomics).
Project description:The purpose of this experiment is to investigate the consequences of ABHD5 deletion in the heart and to evaluate HDAC4-NT gene transfer using AAV9 in ABHD5-KO.
Project description:To identify BVES-interacting proteins from mouse skeletal muscle, we performed IP-mass from AAV9-BVES-HA injected mouse skeletal muscle using the anti-HA magnetic beads.
Project description:The experiment evaluates the therapeutic effect brain injected AAV9-IDS (Adeno-associated virus 9 encoding IDS enzyme) treatment in a mouse model of Mucopolysaccharidosis Type II (MPSII). Microarrays were performed in order to compare the transcriptional profiling after the treatment. Three groups were analyzed, wild type (WT) mice, MPSII mice treated with AAV-NULL (AAV vector alone) and MPSII mice treated with AAV-IDS (vector encoding IDS enzyme). Four months after vector administration (at 6 months of age), animals were sacrificed and tissues were harvested and processed. RNA isolated from the encephalon of three groups of mice was analysed using the Affimetrix® microarray platform
Project description:Pathological cardiac hypertrophy is featured by enhanced protein synthesis. Translation inhibition is effective in treating cardiac hypertrophy, yet with systematic side effect. We identified a cardiac-enriched LncRNA CARDINAL, when over-expressed in cardiomyocyte using AAV9 driven by cTNT promoter, ameliorate transaortic constriction (TAC) induced hypertrophy.
Project description:Purpose: Duchenne muscular dystrophy (DMD) is typically caused by mutations that disrupt the DMD reading frame, but nonsense mutations in the 5’ part of the gene lead to the utilization of an internal ribosomal entry site (IRES) in exon 5, resulting in expression of a highly functional N-truncated dystrophin. We have developed an AAV9 vector expressing U7 small nuclear RNAs targeting DMD exon 2 and tested it in a mouse model containing a duplication of exon 2, in which skipping of both exon 2 copies results in IRES-induced expression, and skipping of only one exon 2 leads to wild-type dystrophin expression. Methods: One-time intravascular injection of an AAV9 vector expressing U7 small nuclear RNAs targeting Dmd exon 2 at either P0-P1 or at 2 months of age results in efficient exon skipping and dystrophin expression, and significant protection from functional and pathologic deficits. Results: In mice treated neonatally, dystrophin immunofluorescence reached 49-85% of normal signal intensity and 76-99% dystrophin-positive fibers, with near-complete correction of dystrophic pathology, and these beneficial effects showed no significant signs of declining for at least 6 months. RNA sequencing (RNA-Seq) and Ribosome Profiling (RPF-Seq) indicated that treatment restored a ‘non-dystrophic’ gene expression profile by reversing the direction and magnitude of differentially expressed genes previously identified in dystrophic skeletal muscle from DMD patients. The dystrophin transcript showed clearly increased RPF reads in the treated sample, indicating that the treatment specifically increased dystrophin translation. Conclusions: The results demonstrate the robustness, durability, and safety of exon 2 skipping following delivery of scAAV9.U7snRNA.ACCA, supporting its clinical use.
