title: Different types of degradable vectors from low-molecular-weight polycation-functionalized poly(aspartic acid) for efficient gene delivery.
abstract: Poly(aspartic acid) (PAsp) has been employed as the potential backbone for the preparation of efficient gene carriers, due to its low cytotoxicity, good biodegradability and excellent biocompatibility. In this work, the degradable linear or star-shaped PBLA was first prepared via ring-opining polymerization of β-benzyl-L-aspartate N-carboxy anhydride (BLA-NCA) initiated by ethylenediamine (ED) or ED-functionalized cyclodextrin cores. Then, PBLA was functionalized via aminolysis reaction with low-molecular-weight poly(2-(dimethylamino)ethyl methacrylate) with one terminal primary amine group (PDMAEMA-NH2), followed by addition of excess ED or ethanolamine (EA) to complete the aminolysis process. The obtained different types of cationic PAsp-based vectors including linear or star PAsp-PDM-NH2 and PAsp-PDM-OH exhibited good condensation capability and degradability, benefiting gene delivery process. In comparison with gold standard polyethylenimine (PEI, ∼ 25 kDa), the cationic PAsp-based vectors, particularly star-shaped ones, exhibited much better transfection performances.
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing Laboratory of Biomedical Materials, College of Materials Science & Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: X B
authors.initials: XB
authors.lastname: Dou
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing Laboratory of Biomedical Materials, College of Materials Science & Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing Laboratory of Biomedical Materials, College of Materials Science & Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: N N
authors.initials: NN
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing Laboratory of Biomedical Materials, College of Materials Science & Engineering, Beijing University of Chemical Technology, Beijing 100029, China. Electronic address: xufj@mail.buct.edu.cn.
authors.forename: F J
authors.initials: FJ
authors.lastname: Xu
mesh_terms: D000818:Animals; D055592:Biophysical Phenomena; D019556:COS Cells; D002522:Chlorocebus aethiops; D004247:DNA / Q000378:metabolism; D004586:Electrophoresis; D018014:Gene Transfer Techniques; D056945:Hep G2 Cells; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008689:Methacrylates / Q000737:chemistry; D008970:Molecular Weight; D009757:Nylons / Q000737:chemistry; D010316:Particle Size; D010455:Peptides / Q000737:chemistry*; D010957:Plasmids / Q000378:metabolism; D011073:Polyamines / Q000737:chemistry*; D000071228:Polyelectrolytes; D055672:Static Electricity
chemical_list: D004247:DNA; D008689:Methacrylates; D009757:Nylons; D010455:Peptides; D011073:Polyamines; D000071228:Polyelectrolytes; C407037:poly(2-(dimethylamino)ethyl methacrylate); C017645:polyaspartate
keywords: Degradable; Gene delivery; PAsp; PDMAEMA; Ring-opening polymerization