Revisit the complexation of PEI and DNA - How to make low cytotoxic and highly efficient PEI gene transfection non-viral vectors with a controllable chain length and structure?
Publication in refereed journal


摘要The commercially available branched polyethyleneimine (PEI) with a molar mass of 25 kD (PEI-25K) is an effective in vitro vector to transfer genes, but its cytotoxicity limits its applications in bio-related research. To solve such an efficiency-versus-cytotoxicity catch-22 problem, the disulfide bond has been previously used to link less toxic short PEI chains (2 kD), but previous literature results are controversial. Recently, we found that it is vitally important to remove both carbon dioxide and water in the linking reaction as well as to control the structure of the resultant chains linked by dithiobis(succinimidyl propionate) (DSP). Under a programmable mixing of PEI and DSP, we can use laser light scattering (LLS) to in-situ monitor the linking reaction kinetics in DMSO in terms of the change of the average molar mass (M(w)). Therefore, we were able to withdraw a series of linked PEI chains with different molar masses from one reaction mixture. Two such linked PEI samples (M(w) similar to 7 kD, PEI-7K-L and similar to 400 kD, PEI-400K-L) were used to illustrate the effect of the sample preparation and the chain structure on the in vitro gene transfection and cytotoxicity. Our results reveal that PEI-7K-L is less cytotoxic and more effective in the gene transfection than both PEI-25K and Lipofectamine 2000 in the in vitro gene transfection. However, PEI-400K-L has no gene transfection efficiency even though it is non-toxic. (C) 2009 Elsevier B.V. All rights reserved.
著者Deng R, Yue Y, Jin F, Chen YC, Kung HF, Lin MCM, Wu C
期刊名稱Journal of Controlled Release
詳細描述To ORKTS: doi: 10.1016/j.jconrel.2009.07.009
頁次40 - 46
關鍵詞Chain structure; Disulfide; Gene delivery; Laser light scattering; Polyethyleneimine
Web of Science 學科類別Chemistry; Chemistry, Multidisciplinary; CHEMISTRY, MULTIDISCIPLINARY; Pharmacology & Pharmacy; PHARMACOLOGY & PHARMACY

上次更新時間 2021-23-01 於 01:57