Project description:Immune system responses against adeno-associated virus (AAV) vectors are potentiated after the first administration, which has prevented the clinical use of repeated administration of AAV-based gene therapies. Here, we quantify the contributions of multiple immune system components towards AAV response in mice. We identify B-cell-mediated immunity, specifically the generation of IgM antibodies, as a critical component preventing vector re-administration.
Project description:Dendrimer-targeted immunosuppression of microglia reactivity further enhances promotes photoreceptor regeneration kinetics in the zebrafish retina
Project description:Nanoparticles and nano delivery systems are continuously being refined and developed as means of treating numerous human diseases by site-specific, and target-oriented delivery of medicines. The nanoparticles can carry therapeutic cargo or be medicinal themselves by virtue of their constitutional structural components. Here we report the ability of synthetic N-acylethanolamides, linoleoylethanolamide (LEA) and oleoylethanolamide (OEA), with endocannabinoid-like activity, to form spherical colloidal nanoparticles that when conjugated with tissue specific homing molecules, can localise to specific areas of the body, and reduce inflammation. The opportunities to mediate pharmacological effects of endocannabinoids at targeted sites provides a novel drug delivery system with increased medicinal potential to treat many diseases in many areas of medicine.
Project description:This dataset comprises bulk RNA-seq and scRNA-seq data derived from thymic tissues of stroke-induced murine models. The data investigate the therapeutic effects of bone marrow-derived mesenchymal stem cell (BM-MSC)-originated migrasomes on stroke-induced thymic atrophy and immunosuppression. The results highlight the mechanistic role of BM-MSC migrasomes in reversing thymic involution and the immunosuppressive state through the specific delivery of the Peptidylprolyl Cis/Trans Isomerase (Pin1) to thymic epithelial cells (TECs). This dataset serves as a valuable resource for understanding post-stroke immunosuppression and the molecular basis of BM-MSC/migrasome-mediated therapy.
Project description:CRISPR-based epigenome editing was recently used to activate gene expression through direct transcriptional activation or site-specific DNA demethylation. Viral delivery of guide RNAs for these purposes remains to be developed. Furthermore, currently available viral delivery tools for genome editing show meager rates of heritability. Here, we have developed a tobacco rattle virus (TRV)-based guide RNA delivery system for both transcriptional activation and targeted DNA demethylation. To promote heritable epigenome editing specifically within plant meristems and the germline, we used the tRNA-guide RNA expression system to express guide RNAs from the viral genome, thus facilitating cell-to-cell movement of the RNA in plants. We achieved up to ~8% heritability of the induced phenotype in the progeny of virus-inoculated plants and 25% in the following generation, indicating high rates of heritability for targeted DNA demethylation. Thus, TRV delivery, in combination with a specific tRNA-gRNA architecture, provides for fast and effective epigenome editing.
Project description:Cance vaccines have become a milestone in immunotherapy, but inadequate activation rate of antigen presenting cells (APCs) and low delivery efficiency of specific antigen have widely limited their clinical application. Here we design an engineered vaccine platform based on targeted delivery of specific antigens to activated APCs. This vaccine platform is implemented by loading stimulator of interferon genes agonist and tumor lysate protein with calcium phosphate as adjuvants, and coating the surface with mannose-modified liposomes. By loading different types of tumor antigen proteins, this nanovaccine platform successfully achieves tumor immunotherapy in breast and colon cancer bearing mice. In addition, personalized nanovaccine prepared from surgically removed tumor lysate proteins also significantly suppresses postsurgical distant tumor. Through the design of nanovaccine platform, we provide an efficient multi-adjuvant delivery platform for multiple types of tumor antigens, and also offer more ideas for personalized vaccine immunization. This nanovaccine platform has great prospects for transformation due to the designability and simplicity for the preparation.
Project description:In vivo delivery systems (IDS) are designed to protect and transport therapeutics, but their efficacy is limited by low delivery efficiency. Here, we reveal that intestinal microbiota critically modulates IDS delivery efficiency by promoting hepatic clearance, whereas disrupting host-microbe interactions markedly enhances drug and gene delivery. Mechanistically, intestinal epithelial sensing of microbial stimuli triggers serotonin production that activates Kupffer cells. Transient inhibition of serotonin signaling, via receptor blockade or dietary intervention, attenuates hepatic clearance and improves systemic delivery. This strategy enhances the efficacy of IDS-based chemotherapy and oncolytic virotherapy and enables body-wide improvements in somatic genome editing and mRNA-based protein replacement. Together, these findings uncover a gut-liver immune axis that broadly constrains IDS performance, offering general approaches to improving in vivo therapeutic delivery.