Dose dependant expression of c-Fos and Egr-1 by propofol following 60 min stimulation. The transcription of c-Fos and Egr-1 was quantified using qRT-PCR. Gene transcription is normalized to actin and to non-treated controls. Data are presented as mean ± sd from three independent experiments. * p < 0.05; ** p < 0.01 versus non-treated control.