Poly-aspartamide-glutamic acid grafted low molecular weight polyethylenimine as a novel non-viral gene vector / 浙江大学学报·医学版

ABSTRACT

<p><b>OBJECTIVE</b>To develop a novel gene delivery vector with poly-aspartamide-glutamic acid and polyethylenimine as the backbone.</p><p><b>METHODS</b>alpha, beta-poly-(N-2-hydroxypropyl)-D, L-aspartamide-glutamic acid (PHPAG) was synthesized and low molecular weight polyethylenimine (PEI 1.8 kDa) was grafted to form PHPAG-PEI 1800. Chemical and biological characterization of the polymer was identified.</p><p><b>RESULT</b>The polymer was confirmed by (1)H-NMR, and the molecular weight was about 1.2 x 10(4). The ability of DNA binding was showed by gel retardation assay at N/P ratio of 3. 5. MTT assay showed that the polymer was non toxic in COS-7 and A293 cell lines. In vitro test demonstrated that it had high transfection efficiency in B16 and Hela cell lines.</p><p><b>CONCLUSION</b>PHPAG-PEI 1800 was successfully synthesized,which might be a potential vector for gene delivery.</p>