[Experimental study of baculovirus-mediated transfection of spiral ganglion cells in rats].
OBJECTIVE
To study the feasibility and the characteristics of recombinant baculovirus as spiral ganglion cells (SGC) gene transfer vector.


METHODS
After the generation of baculovirus- green fluorescent protein( Bac-GFP) according to Bac-to-Bac baculovirus expression system, SGC were infected by Bac-GFP with different multiplicities of infection (MOI) and different concentrations of sodium butyrate. The transfection cell rate and mean fluorescence strength (MFS) were detected by fluorescence microscopy and flow cytometry. Toxicity effects of recombinant baculovirus vectors and sodium butyrate on SGC were determined by spectroscopic measurement of 3-(4, 5)-dimethylthiahiazo (-z-y1)-3, 5-diphenytetrazoliumromide (MTF).


RESULTS
Baculovirus was able to infect primary SGC cultures. The dose-response characteristics of Bac-GFP were determined on SGC, and the expression level could be up-regulated by sodium butyrate. Infection with Bac-GFP in the absence or presence of sodium butyrate (< or =10 mmol/L) was considered to be non-cytotoxic to primary SGC. GFP had been expressed in SGC at 6 h post-infection and the highest numbers of cells expressing GFP were observed at approximately 48 h post-infection.


CONCLUSIONS
Baculovirus is a novel and promising tool for gene transferring into the cochlear nervous system both for studies of the function of foreign genes and the development of gene therapy strategies.
Wang
Jun
J
Department of Otorhinolaryngology, Ruijin Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200025, China.
Wang
Shi-li
SL
Cai
Chang-ping
CP
Li
Biao
B
Zhang
Yi-fan
YF
Hu
Sheng-ping
SP
Tian
Xiang-long
XL
Zhang
Min
M
D000818:Animals; D016367:Baculoviridae / Q000235:genetics*; D002478:Cells, Cultured; D018014:Gene Transfer Techniques; D005822:Genetic Vectors; D049452:Green Fluorescent Proteins / Q000235:genetics; D051381:Rats; D017207:Rats, Sprague-Dawley; D013136:Spiral Ganglion / Q000166:cytology; D014162:Transfection
D049452:Green Fluorescent Proteins