Table 6.

Effect of glycyrrhizin treatment on SP level in peripheral blood and nasal mucosa.

Group	Peripheral blood (pg/mL)	Nasal mucosa (pg/mL)
NC	85.38 ± 5.94	50.53 ± 6.03
MC	157.04 ± 13.29 b	97.29 ± 10.67 b
lycopene 20 mg kg−1	148.39 ± 13.05	91.32 ± 9.73
glycyrrhizin 10 mg kg−1	124.25 ± 13.11 d	80.15 ± 9.05 c
glycyrrhizin 20 mg kg−1	104.31 ± 9.49 d	69.42 ± 7.77 d
glycyrrhizin 30 mg kg−1	90.63 ± 7.37 d	60.11 ± 7.14 d

^b P < 0.05, compared with NC group; ^c P < 0.05, ^d P < 0.01, compared with MC group.