Polymeric microspheres as stabilizing anchors for oligonucleotide delivery to dendritic cells

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• 作者：Jeffrey R. Kovacs ; Ying Zheng ; Hongmei Shen and Wilson S. Meng
• 关键词：DNA delivery ; Dendritic cell ; Nanoparticle ; Cationic peptide ; Oligonucleotide
• 刊名：Biomaterials
• 出版年：2005
• 期刊代码：7_01429612
• 类别：ms
• 出版时间：2005
• 卷：26
• 期：33
• 页码：6754-6761
• 文件大小：713 K

摘要

The aim of this study is to evaluate a novel microspheric vector for delivery of oligonucleotides (ODN) into dendritic cells (DC). A requirement of decoy-based modulation of transcriptional activities in DC is that the ODN would have to accumulate inside the cell. Using an ex vivo DC culture model, we demonstrate that anionic microspheres (MS) coated with an ornithine/histadine-based cationic peptide (O10H6) is an effective carrier of short ODN. This method does not disrupt the colloidal nature of the microspheric particles. The MS provide stabilizing effect on DNA and O10H6 complexation. Accumulation of ODN in DC is greatly enhanced with the surface modified MS. Taken together, these data demonstrate that the self assembly system of MS_O10H6 is an effective delivery vehicle for DNA-based modulation of DC functions.