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Functional Polymers for Biomedical Applications  
Functional Polymers for Biomedical Applications
资料类型: PDF文件
关键词: Drug  delivery  Gene  vector  Polymer  Peptide  
资料大小: 71K
所属学科: 通用高分子材料
来源: 来源网络
简介:
Comparedwithconventionaltherapeuticsystems,drugandgenedeliverysystemsoffernumerousadvantages,includingprolongeddurationtime,reducedsideeffects,improveddrugbioactivityandenhancedtherapeuticefficiency.Toenhancethebioavailabilityoftherapeuticsandtodelivertherapeuticagentstoparticulartissuesandcells,theidealdrugandgenedeliverysystemsshouldhavedesiredfunctionalproperties,includingtargetabilityandstimuliresponsibility.Ourstudiesfocusedonthefunctionalpolymersandpeptidesfordrugandgenedelivery.Toendowthedeliverysystemswithactivetargetingproperty,studieswerecarriedoutontheincorporationofvarioustargetingligandsincludingparticularcellpenetratingpeptidesequence,RGDsequence,transferrin,galactose,andfolateetc.todifferentdeliverysystemsthroughcovalentbondsaswellasbiotin-avidininteraction.Togivethedeliverysystemswithstimuliresponsibility,wedesignedvariousdrugdeliverysystemswithstimuliresponsibilitiesincludingpH,temperature,redox,andlightsensitivities.Toachieveenhancedsynergyeffects,double/multiplestimuli-responsivesystemshavealsobeendeveloped.Thephysical/chemicalpropertiesanddrug/genedeliverybehaviorsinvitroorinvivoofprepareddrugandgenedeliverysystemswereinvestigatedindetail.Theresultsshowedthedrugandgenedeliverysystemsexhibitedimproveddrugcontrolledreleasepropertiesandenhancedgenetransfectionefficiencies.Inaddition,thetargeteddeliverytoparticulartissueandtumorcellscouldbeachievedthroughincorporationofparticulartargetingligands.
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