loading  Checking for direct PDF access through Ovid



A new kind of polyethyenimine-polyethylene glycol (PEI-PEG) is apt to synthesis and modification, and has good stability, easily regulated structure and properties, which has been applied to a variety of diseases as gene transfer vectors.


To study the feasibility and the characteristics of nanoparticles PEI-PEG as gene transfer vector for spiral ganglion cells of the inner ear of mice.


Using PEI-PEG (experimental group) and lipofectamine™ 2000 (control group) as gene transfer vectors, with enhanced green fluorescent protein (EGFP) as tracing protein, spiral ganglion cells were transfected in vitro, the transfection rate and mean fluorescence strength were detected by fluorescence microscopy and flow cytometry. Toxicity effects of each vector on spiral ganglion cells were determined by spectroscopic measurement of MTT method.


After transfection with two vectors, spiral ganglion cells had no changes in morphology. The transfection rate of PEI-PEG was statistically higher than that of liposome (P < 0.05). Also, the toxicity effects of PEI-PEG to spiral ganglion cells was lightly than that of liposome (P < 0.05). As a new gene transfer vector, PEI-PEG has a higher transfection rate and lower toxicity effects to spiral ganglion cells compared to liposome, and can serve as gene transferring system into cochlear nervous system.

Subject headings:

polyethylene glycols; polyethyleneimine; liposomes; spiral ganglion


the Natural Science Foundation of Guangdong Province, No. S2011040003553

Related Topics

    loading  Loading Related Articles