Shin, Jisoo Cho, Jung Ho Jin, Yoonhee Yang, Kisuk Lee, Jong Seung Park, Hyun-Ji Han, Hyung-Seop Lee, Jinkyu Jeon, Hojeong Shin, Heungsoo Cho, Seung-Woo 2024-01-20T02:33:47Z 2024-01-20T02:33:47Z 2021-09-04 2016-12 1613-6810 https://pubs.kist.re.kr/handle/201004/123323 Using small interfering RNA (siRNA) to regulate gene expression is an emerging strategy for stem cell manipulation to improve stem cell therapy. However, conventional methods of siRNA delivery into stem cells based on solution-mediated transfection are limited due to low transfection efficiency and insufficient duration of cell-siRNA contact during lengthy culturing protocols. To overcome these limitations, a bio-inspired polymer-mediated reverse transfection system is developed consisting of implantable poly(lactic-co-glycolic acid) (PLGA) scaffolds functionalized with siRNA-lipidoid nanoparticle (sLNP) complexes via polydopamine (pDA) coating. Immobilized sLNP complexes are stably maintained without any loss of siRNA on the pDA-coated scaffolds for 2 weeks, likely due to the formation of strong covalent bonds between amine groups of sLNP and catechol group of pDA. siRNA reverse transfection with the pDA-sLNP-PLGA system does not exhibit cytotoxicity and induces efficient silencing of an osteogenesis inhibitor gene in human adipose-derived stem cells (hADSCs), resulting in enhanced osteogenic differentiation of hADSCs. Finally, hADSCs osteogenically committed on the pDA-sLNP-PLGA scaffolds enhanced bone formation in a mouse model of critical-sized bone defect. Therefore, the bio-inspired reverse transfection system can provide an all-in-one platform for genetic modification, differentiation, and transplantation of stem cells, simultaneously enabling both stem cell manipulation and tissue engineering. English Wiley - V C H Verlag GmbbH & Co. Mussel Adhesion-Inspired Reverse Transfection Platform Enhances Osteogenic Differentiation and Bone Formation of Human Adipose-Derived Stem Cells Article 10.1002/smll.201601868 1 Small, v.12, no.45, pp.6266 - 6278 Small 12 45 6266 6278 N scie scopus 000389408000009 2-s2.0-84988857238 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article SIRNA DELIVERY RNA INTERFERENCE GENE DELIVERY NANOPARTICLES SURFACE EFFICIENT SCAFFOLDS COATINGS NANOTOPOGRAPHY NANOMECHANICS lipidoid nanoparticles osteogenic differentiation polydopamine siRNA reverse transfection stem cells