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

<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>

Therapeutic effects of amiodarone and metoprolol on chronic heart failure complicated by ventricular arrhythmia / 南方医科大学学报

<p><b>OBJECTIVE</b>To explore the therapeutic effects of amiodarone and metoprolol, either alone or in combination, on chronic heart failure (CHF) complicated by ventricular arrhythmia.</p><p><b>METHODS</b>A total of 110 NYHA class II-III patients with CHF complicated by ventricular arrhythmia were randomly divided into amiodarone group, metoprolol group and amiodarone + metoprolol group. The therapeutic effects was evaluated at the end of the 1-year follow-up.</p><p><b>RESULTS</b>Amiodarone, metoprolol and their combination produced statistically different therapeutic effects (P<0.05). Compared with amiodarone and metoprolol used alone, amiodarone combined with metoprolol resulted in significant cardiac function improvement (P<0.05) and ventricular arrhythmia control (P<0.01). During the 1-year follow-up, the readmission rate and cardiac event rate in the amiodarone + metoprolol group were significantly lower than those in amiodarone group (P<0.01) and metoprolol group (P<0.05). The adverse reaction rates in the 3 groups were similar (P>0.05).</p><p><b>CONCLUSION</b>The combination of amiodarone and metoprolol produces better effect than amiodarone or metoprolol alone in the treatment of CHF complicated by ventricular arrhythmia.</p>