Eneficial PI4KIIIα Source effects in a variety of illness models. Nevertheless, most mammalian cells secret small level of EV, which can be a limitation for development of therapeutics. Thus, the subsequent generation of EV-mimetic vesicles developed by serial extrusion of cells produces larger number of vesicles, and could possibly be less complicated to scale up for therapeutic developments. Within this study we aimed to test the efficacy of EV-mimetic vesicles derived from human adipose-derived stem cells (hASCs) on rat osteoarthritis (OA) model. Approaches: hASC-derived EV-mimetic vesicles (CDV) were produced by serial extrusions of cells via filters. The CDVs have been characterized by transmission electron microscopy (TEM), nanoparticle analysis system (NTA), and western blot and flow cytometry. CDVs had been injected in to the joints inside a MIA-induced osteoarthritis (OA) rat model. Improvement of pain just after CDV injections was assessed by paw withdrawal threshold and weight bearing, whereas the joint destruction was evaluated by histology. We also estimated the effects of CDV on proliferation and migration of human chondrocytes in vitro by cell-counting and scratch assays. Results: The CDV were 5050 nm in diameter and carried many EV-associated tetraspanins (CD63, CD9, CD81). CDV-treated OA mice had decreased paw withdrawal and was a lot more weight bearing 17 days just after therapy than PBS-treated. Additional, histology showed lowered joint defects at 24 days. CDV-treated OA models displayed considerable improvement in pawJOURNAL OF EXTRACELLULAR VESICLESwithdrawal behaviour and weight bearing analysis. Similarly, chondrocyte migration and proliferation had been enhanced by CDV in a dose-dependent manner. Summary/Conclusion: This study demonstrates for the first time the efficacy of hASC EV-mimetic vesicles in OA model. Most interestingly we’ve confirmed that hASC EV-mimetic vesicles can strengthen pain and regenerate defected cartilage. These final results help the idea that a potential application of hASC EVmimetic is osteoarthritis, by giving CDV locally into impacted joints.Funding: This project is sponsored by NIH grant R01DE027404 and also the Osteology Foundation Sophisticated Researcher award.PF08.Exosomes secreted in the course of chondrogenic differentiation of human adipose-derived stem cells for osteoarthritis remedy Ye eun Yuna, Woo Sung Kima, Hyun-A Parkb, Su Yeon Kimb and Yong Woo Choc Division of Chemical Engineering, Hanyang University, Ansan, Republic of Korea; bExostemtech,Inc., Ansan, Republic of Korea; cHanyang University, Ansan, Republic of KoreaaPF08.Organic and synthetic biomaterial mediated delivery of Mesenchymal Stem Cell derived exosomes Chun-Chieh Huanga, Miya Kanazawab, Praveen Gajendrareddyc and Sriram Ravindranaa University of Illinois at Chicago, Chicago, IL, USA; bUIC College of Dentistry, Oral Biology, Chicago, IL, USA; cUniversity of Illinois, Chicago, Chicago, IL, USAIntroduction: Mesenchymal stem cell (MSC) derived exosomes are versatile agents that possess immunomodulatory and regenerative properties. Even so, systemic delivery of organic or engineered MSC exosomes lacks site-specificity and may trigger ectopic effects. Hence, biomaterial-mediated site-specific delivery of exosomes is important. As exosomal membranes are subsets in the plasma membrane. We hypothesized that MSC exosomes can bound to extracellular matrix proteins along with the house is Vps34 drug usually used as a delivery approach. Strategies: To test this hypothesis, we evaluated the binding and delivery kinetics of MSC exosomes to a.