PMID- 38436394 OWN - NLM STAT- MEDLINE DCOM- 20240327 LR - 20240327 IS - 1473-0189 (Electronic) IS - 1473-0189 (Linking) VI - 24 IP - 7 DP - 2024 Mar 26 TI - Tonicity-induced cargo loading into extracellular vesicles. PG - 2069-2079 LID - 10.1039/d3lc00830d [doi] AB - The current challenge in using extracellular vesicles (EVs) as drug delivery vehicles is to precisely control their membrane permeability, specifically in the ability to switch between permeable and impermeable states without compromising their integrity and functionality. Here, we introduce a rapid, efficient, and gentle loading method for EVs based on tonicity control (TC) using a lab-on-a-disc platform. In this technique, a hypotonic solution was used for temporarily permeabilizing a membrane ("on" state), allowing the influx of molecules into EVs. The subsequent isotonic washing led to an impermeable membrane ("off" state). This loading cycle enables the loading of different cargos into EVs, such as doxorubicin hydrochloride (Dox), ssDNA, and miRNA. The TC approach was shown to be more effective than traditional methods such as sonication or extrusion, with loading yields that were 4.3-fold and 7.2-fold greater, respectively. Finally, the intracellular assessments of miRNA-497-loaded EVs and doxorubicin-loaded EVs confirmed the superior performance of TC-prepared formulations and demonstrated the impact of encapsulation heterogeneity on the therapeutic outcome, signifying potential opportunities for developing novel exosome-based therapeutic systems for clinical applications. FAU - Lee, Chaeeun AU - Lee C AD - Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea. ykcho@unist.ac.kr. AD - Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Korea. FAU - Kumar, Sumit AU - Kumar S AD - Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea. ykcho@unist.ac.kr. AD - Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Korea. FAU - Park, Juhee AU - Park J AD - Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Korea. FAU - Choi, Yongjun AU - Choi Y AUID- ORCID: 0000-0002-3814-3643 AD - Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Korea. FAU - Clarissa, Elizabeth Maria AU - Clarissa EM AD - Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea. ykcho@unist.ac.kr. AD - Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Korea. FAU - Cho, Yoon-Kyoung AU - Cho YK AUID- ORCID: 0000-0001-6423-1834 AD - Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea. ykcho@unist.ac.kr. AD - Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Korea. LA - eng PT - Journal Article DEP - 20240326 PL - England TA - Lab Chip JT - Lab on a chip JID - 101128948 RN - 0 (MicroRNAs) RN - 80168379AG (Doxorubicin) SB - IM MH - *Extracellular Vesicles MH - *MicroRNAs MH - *Exosomes MH - Cell Communication MH - Doxorubicin/pharmacology MH - Drug Delivery Systems/methods EDAT- 2024/03/04 12:45 MHDA- 2024/03/27 06:43 CRDT- 2024/03/04 09:55 PHST- 2024/03/27 06:43 [medline] PHST- 2024/03/04 12:45 [pubmed] PHST- 2024/03/04 09:55 [entrez] AID - 10.1039/d3lc00830d [doi] PST - epublish SO - Lab Chip. 2024 Mar 26;24(7):2069-2079. doi: 10.1039/d3lc00830d.