The use of reactive polymer coatings to facilitate gene delivery from poly (epsilon-caprolactone) scaffolds

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题名:	The use of reactive polymer coatings to facilitate gene delivery from poly (epsilon-caprolactone) scaffolds
作者:	Hu,WW;Elkasabi,Y;Chen,HY;Zhang,Y;Lahann,J;Hollister,SJ;Krebsbach,PH
贡献者:	化學工程與材料工程學系
关键词:	CHEMICAL-VAPOR-DEPOSITION;SURFACE MODIFICATION;ADENOVIRUS;IMMOBILIZATION;ANTIBODY;THERAPY;IRRADIATION;ATTACHMENT;RETROVIRUS;DEVICES
日期:	2009
上传时间:	2010-06-29 17:28:20 (UTC+8)
出版者:	中央大學
摘要:	To functionalize biomaterials for bioconjugation, a chemical vapor deposition (CVD) polymerization technique was utilized to modify material surfaces. Poly [(4-amino-p-xylyiene)-co-(p-xylylene)] (PPX-NH2) was deposited on inert polycaprolactone (PCL) surfaces to provide a reactive amine layer on the substrate surfaces. The biocompatibility of PPX-NH2 was evaluated by 3-(4,5-dimethylthiazol-2-yl)-5-(3carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) and lactate dehydrogenase (LDH) assays. The results demonstrated that cells continuously proliferated on CVD treated PCL surfaces with high survival rates. Biotin was conjugated on modified PCL surfaces to immobilize avidin for binding of biotinylated adenovirus. Scanning electron microscopy (SEM) examination illustrated that adenoviruses were evenly bound on both 2-D films and 3-D scaffolds, suggesting CVD was capable of modifying various substrates with different geometries. Using a wax masking technique, the biotin conjugation was controlled to immobilize avidin on specific sites. Due to the virus binding specificity on CVD-modified surfaces, cell transduction was restricted to the pattern of immobilized virus on biomaterials, by which transduced and non-transduced cells were controlled in different regions with a distinct interface. Because CVD was functional in different hierarchies, this surface modification should be able to custom-tailor bioconjugation for different applications. Published by Elsevier Ltd.
關聯:	BIOMATERIALS
显示于类别:	[化學工程與材料工程研究所] 期刊論文

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