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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/22290


    標題: Remnant cationic dendrimers block RNA migration in electrophoresis after monophasic lysis.
    作者: Jung-Hua Steven Kuo
    Yi-Lin Lin
    貢獻者: 藥物科技研究所
    關鍵字: Cationic dendrimer
    RNA isolation
    DNA/dendrimer complexes
    Monophasic lysis
    Gel electrophoresis
    日期: 2007-05
    上傳時間: 2010-01-15 14:39:52 (UTC+8)
    摘要: Cationic dendrimers such as poly(amidoamine) (PAMAM) and poly(propyleneimine) (PPI) have attractive characteristics for the delivery of nucleic acid and various biomedical applications. Most studies have focused on cationic dendrimer-based intracellular delivery, and very few studies have focused on the non-specific interaction of remnant cationic dendrimers with total RNA after isolation directly from cells in vitro. We examined RNA isolation using the common method of monophasic lysis from human macrophage-like cells (U937) and mouse fibroblast cells (NIH/3T3) that had been exposed to dendrimers and DNA/dendrimer complexes using gel electrophoresis. We found that PAMAM and PPI dendrimers strongly altered the mobility of RNA in the gels. In addition, the extent of dendrimer-induced alteration in RNA mobility was directly dendrimer-generation-dependent: the alteration was greater with higher-generation dendrimers. We also found that DNA/dendrimer complexes at higher dendrimer to DNA ratios interacted with RNA after isolation while gene expression was maintained. The interactions between RNA and remnant dendrimers after isolation were caused by electrostatic bindings, and we recovered total RNA using high ionic strength solvents (2 M NaCl solution) to disrupt the electrostatic forces binding dendrimers to RNA. Because RNA isolation is routinely used for biological applications, such dendrimer-induced alteration in RNA mobility should be accounted for in the further processing of RNA-related applications.
    關聯: Journal of Biotechnology 129(3): p.383-390
    Appears in Collections:[藥學系(所)] 期刊論文

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