Table 2.

Ratio of δOR/GAPDH mRNA expression in the rat dorsal root ganglia

	Ratio of δOR/GAPDH	n
Saline	0.116 ± 0.012	6
MS 24 h	0.167 ± 0.033	4
MS 48 h	0.131 ± 0.012	4
CFA 72 h (ipsi)	0.132 ± 0.018	4
CFA 72 h (contra)	0.134 ± 0.004	3

Data are the mean ± SEM of the ratio of δOR/GAPDH mRNA fluorescence levels in rat dorsal root ganglia after real-time RT-PCR amplification. No significant difference is apparent between any groups (p > 0.05; one-way ANOVA followed by Bonferroni's MCT). MS 24 h, Morphine sulfate 24 h (using doses of 5 and 8 mg/kg, respectively, given every 12 h); MS 48 h, morphine sulfate 48 h (using doses of 5,8,10, and 15 mg/kg, respectively, given every 12 h); ipsi, side ipsilateral to CFA injection; contra, side contralateral to CFA injection; n, number of rats tested in each condition.