کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10227476 446 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Long-term efficient gene delivery using polyethylenimine with modified Tat peptide
ترجمه فارسی عنوان
تحویل ژن موثر درازمدت با استفاده از پلی اتیلنیمیم با پپتید تیتان اصلاح شده
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
چکیده انگلیسی
Polyethylenimine (PEI), a cationic polymer, has been widely studied and shown great promise as an efficient gene delivery vehicle. Likewise, the HIV-1 Tat peptide, a cell-permeable peptide, has been successfully used for intracellular gene delivery. To improve the favorable properties of these two vectors, we combine PEI with the modified Tat peptide sequence bearing histidine and cysteine residues (mTat). In vitro mTat/PEI-mediated transfection was evaluated by luciferase expression plasmid in two cell types. mTat/PEI produced significant improvement (≈5-fold) in transfection efficiency of both cell lines with little cytotoxicity when compared to mTat alone, PEI alone, or four commercial reagents. The particle size of mTat/PEI/DNA complex was significantly smaller than mTat or PEI alone, and it was correlated with higher transfection efficiency. Filipin III, an inhibitor of caveolae-mediated endocytosis, significantly inhibited mTat/PEI transfection. In contrast, chlorpromazine, an inhibitor of clathrin-mediated endocytosis, did not. This suggested caveolae-mediated endocytosis as the transfection mechanism. Furthermore, the results of in vivo studies showed that animals administered mTat/PEI/DNA intramuscularly had significantly higher and longer luciferase expression (≈7 months) than those with mTat/DNA, PEI/DNA, or DNA alone, without any associated toxicity. The combination of mTat with PEI could significantly improve transfection efficiency, expanding the potential use as a non-viral gene vector both in vitro and in vivo.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomaterials - Volume 35, Issue 5, February 2014, Pages 1705-1715
نویسندگان
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