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Magnetic iron oxide (Fe3O4) Nanoparticles Prepared with Water Soluble Polymer Ligand for Drug Delivery  
Magnetic iron oxide (Fe3O4) Nanoparticles Prepared with Water Soluble Polymer Ligand for Drug Delivery
資料類型: PDF文件
關(guān)鍵詞: Biocompatible  Iron  o  xide  Magnetic  nanoparticles  Drug  
delivery  
資料大小: 110K
所屬學(xué)科: 分子表征
來源: 第六屆亞歐研討會上處理和性能增強聚合物會議文集(2013.6.2-6 武漢)
簡介:
Magneticironoxidenanoparticles(MIONs),owingtotheiradvantagessuchaslowtoxicityandbiocompatibility,areconsideredtobethemostfavorablecandidatesforbio-applicationsincludingmagneticresonanceimaging(MRI),magneticfluidhyperthermia(MFH),magneticseparationandimmobilizationofbiomoleculessuchasnucleicacidsandproteins,thedevelopmentofdrugdeliverysystemsforcontrolledreleaseofdrugsbiolabelingandmagneticsensors.[1]Inthisstudywehavedescribedasimpleonestepprotocolforthepreparationoffairlymonodisperseandhighlywater-solublemagneticironoxidenanoparticles(MIONs)throughco-precipitationmethodusinganovelmultifunctional,biocompatibleandwater-solublepolymerliganddodecanethiol-polymethacrylicacid(DDT-PMAA).DDT-PMAA,owingtoitsseveralintrinsicproperties,notonlyefficientlycontrolsthesizeoftheMIONsbutalsogivesthemexcellentwatersolubility,longtimestabilityagainstaggregationandoxidation,biocompatibilityandmultifunctionalsurfacerichinthioetherandcarboxylicacidgroups.Themolecularweightandconcentrationofthepolymerligandwereoptimizedtoproduceultrasmall(4.6+0.7nm)MIONswithhighmagnetization(50emug-l)Doxorubicin(DOX)throughitsaminegroupswasconjugatedtothecarboxylicacidgroupsofMIONsthroughelectrostaticandcovalentinteractionstoprepareDOX/MIONsandDOX-MIONsrespectively.NPsanddrugconjugatesshowedhighdrugloadingefficiency(upt060%)anddemonstratedhighercytotoxicitytowardsHepG2cancercellsduetotheirimprovedsolubilityandcellularuptakethanthefreedrug.ItwasobservedthatdrugloadingmodecansignificantlyaffectthedrugefficiencyandthisstudycanhelpintheoptimizationofdevelopmentoftheMIONsbaseddrugdeliveryformulations.MIONsstabilizedwithDDT-PMAAhaverichsurfacechemistrywhichcanbeexploitedfortheconjugationofavarietyoftherapeutic,targeting,andlabellingagentsforseveralbio-analyticalanddrugdeliveryapplications.
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上傳時間: 2013-07-04 16:26:02
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