Abstract: Objective To investigate the effect of thiopental on lipopolysaccharide(LPS)-induced activation of nuclear factor kappa B(NF-κB) under different concentration or after different time in rat glioma cells in vitro.Methods The rat C ₆ glioma cells were treated with,in the presence or Absence of various concentrations(10^-3 mol/L,10^-4 mol/L and 10^-5 mol/L)of thiopental for 1 h.30 min before harvest,the cells were exposed to LPS(10 ng/ml).The other C ₆ cells were treated with 10^-5 mol/L thiopental with different time(0.5 h,1 h,2 h,4 h).30 min before harvest,the cells were exposed to LPS(10 ng/ml).Nuclear extracts from C 6 cells were harvested using standard procedures,and the LPS-induced NF-κB expression was determined with electrophoretic mobility shift assays(EMSA) and measured with densitometry(Bio-Rad).Results The width of the bands of NF-κB under thiopental with different concentrations were similar,but they were narrower than that of the control(treated only with LPS),the density was less than that of the control(P<0.05).The width of the bands of NF-κB under thiopental with different time decreased with the time(P<0.05),and they were much narrower and shallower than that of the control(P<0.05),and the density was significantly less than that of the control(P<0.05).Conclusion Thiopental suppressed the activation of transcription factor NF-κB,and the inhibition was concentration-independent but time-dependent.

Key words: nuclear factor kappa B(NF-κB), glioma cell, thiopental, concentration, time