Ion. At present, there’s a lack of knowledge around the achievable involvement of EVs in ZIKV pathogenesis. Our study aims to unravel the function of EVs in ZIKV RNA transmission towards the brain, by way of the BBB. Strategies: Human brain microvascular endothelial cells (HBMEC/D3) were utilized in our study given that they represent the BBB in vitro. 3 various EV isolation techniques (precipitation kit, density gradient and size exclusion chromatography combined with all the density gradient) had been performed. Western blot, Transmission electron microscopy and Nanosight tracking analysis confirmed the presence of EVs in the supernatant of HBMEC/D3 cells. The presence of ZIKV RNA in infected-EVs (IEVs) was evaluated by immunofluorescence and qPCR. Moreover, the effect of IEVs around the BBB was assessed applying a label-free impedance-based biosensor (ECIS, Applied BioPhysics). Final results: We confirmed the presence of viral components in our IEVs, which includes the NS1 and E proteins of ZIKV. The obtained IEVs had been able to reinfect CD35/CR1 Proteins Source susceptible cells, even soon after getting pretreated with RNase A. This indicates that the viral RNA resides inside the IEVs. Making use of impedance measurements on HBMEC/ D3 cell monolayers, we observed that IEVs, also as virus control caused equivalent and temporal disturbances around the monolayer’s integrity within 30 min post infection. No disturbances have been seen upon addition of noninfected EVs. Summary/Conclusion: Our study demonstrates that EVs-derived from ZIKV-infected cells are in a position to transfer proteins and viral RNA to recipient cells. Since both IEVs and viral particles can induce equivalent modifications on barrier’s integrity it really is feasible that IEVs are involved in an option mechanism of ZIKV transmission.OWP2.09=PS02.Deciphering the function of extracellular vesicles on the blood rain barrier for the duration of Zika virus infection Antonios Fikatas, Sam Noppen, Peter Vervaeke, Jordi Doijen, Mohammed Benkheil, Christophe Pannecouque and Dominique Schols Laboratory of Virology and Chemotherapy, Rega Institute, KU Leuven, Belgium, BelgiumOWP2.10=PF12.HIV-specific antibody mediated targeting of ENV+ tissues by exosomes Zou Xue, Yuan M’eng, Zheng Nan and Wu Zhiwei Nanjing University, Nanjing, China (People’s Republic)Introduction: The association of Zika virus (ZIKV) with extreme neurological disorders has gained enhanced interest over the final decade. Even so, the mechanism by which ZIKV crosses the blood rain barrier (BBB) and reaches the brain remains to become elucidated. It isIntroduction: Antiretroviral therapy can correctly suppress HIV replication in the peripheral blood to an undetectable level. Even so, efforts to eradicate the latent virus in reservoirs remain a challenge and are a significant obstacle in the remedy of HIV sufferers. Exosomes exhibit massive promise as an endogenous drugISEV2019 ABSTRACT BOOKdelivery nanosystem for delivering drugs to reservoir tissues given their exceptional properties, which includes low immunogenicity, innate stability, higher delivery efficiency and largely importantly the capability to penetrate solid tissues as a result of their lipophilic properties. Strategies: In this study, we engineered and expressed the ScFv of a higher affinity HIV-specific monoclonal antibody, 10E8, on exosome surface. Exosomes from 293T cells were loaded with curcumin through saponin, with effective as much as 34 . CD49e/Integrin alpha-5 Proteins Formulation 10E8ScFv-expressing exosomes (10E8-Exo) showed very efficient targeting of and curcumin delivery to CHO cell that expresses a trimeric gp140 on its surface (ENV+ cells) in vitro as demon.