Effect of hydrogen-rich saline on allergic contact dermatitis in mice / 中华皮肤科杂志

ABSTRACT

Objective To evaluate the therapeutic effect of hydrogen-rich saline on allergic contact dermatitis (ACD) in mice and to explore its underlying mechanisms.Methods Forty mice were equally divided into 4 groupscontrol group,control treatment group,ACD group and ACD treatment group.ACD was induced by repetitive topical application of dinitrofluorobene (DNFB) to the left ear of mice on day 1,2 and 5.Hydrogen-rich saline was intraperitoneally given to the mice in the ACD treatment group at a dose of 5 ml/kg per day from day 1 to 5.On day 6,the mice were sacrificed,ear tissue was removed from them and subjected to measurement of thickness and weight,detection of tumor necrosis factor (TNF)-α,interleukin (IL)-6,IL-17 and interferon (IFN)-γ expression by enzyme linked immunosorbent assay,as well as numeration of inflammatory cells in lesions after hematoxylin-eosin (HE) staining.Data were processed by SPSS 18.0 software,and statistical analysis was carried out by one-way analysis of variance and least significant difference (LSD) procedure.Results Compared with the control group,the ACD group showed a significant increase in lesion score (7.33 ± 1.53 vs.0,P ＜ 0.05),differences in the thickness ((0.73 ± 0.15) mm vs.(0.13 ± 0.05) mm,P ＜ 0.05) and swelling degree (expressed as tissue weight(18.67 ± 3.05) mg vs.(3.33 ± 1.52) mg,P ＜ 0.05) between the left and right ear,expressions of TNF-α ((1475.52 ± 233.81) pg/mg vs.(239.01 ± 52.39) pg/mg,P＜ 0.05),IL-6 ((184.65 ± 78.39) pg/mg vs.(42.28 ± 17.64) pg/mg,P＜ 0.05),IL-17 ((628.56 ± 201.44) pg/mg vs.(127.58 ± 50.28) pg/mg,P＜ 0.05) and IFN-γ ((197.72 ± 37.81) pg/mg vs.(24.57 ± 8.31) pg/mg,P ＜ 0.05),and the number of inflammatory cells per square millimetre in the left ear tissue (752.00 ± 166.06 vs.127.33 ± 77.18,P ＜ 0.05).However,hydrogen-rich saline treatment induced a statistical decrease in all of these parameters in the ACD treatment group compared with the ACD group,including lesion score (3.33 ± 0.58,P ＜ 0.05),difference in thickness ((0.46 ± 0.11) mm,P ＜ 0.05) and swelling degree ((11.00 ± 2.64) mg,P ＜ 0.05),expressions of TNF-α ((817.72 ± 101.13) pg/mg,P＜ 0.05),IL-6 ((95.86 ± 36.65) pg/mg,P＜ 0.05),IL-17 ((373.38 ± 126.74) pg/mg,P＜ 0.05),IFN-γ ((63.31± 17.38) pg/mg,P ＜ 0.05) and the number of inflammatory cells per square millimetre (384.00 ± 97.35,P ＜0.05).Conclusion Hydrogen may inhibit the release of inflammatory factors in ACD.