Effect of Acupoint External Application of Herbal Drugs on Pathological Changes of Nasal Mucosa of Allergic Rhinitis Mice / 广州中医药大学学报

ABSTRACT

【Objective】To observe the effect of acupoint external application of herbal drugs on pathological changes of nasal mucosa of allergic rhinitis mice. 【Methods】 Sixty BALB/c mice were divided into 5 groups A(normal),B(model),C(treated with external application of herbal drugs on acupoints),D(treated with dexamethasone) and E(treated with PBS).Except group A,the mice in other groups were sensitized by ovalbumin(OVA).On the 15~(th) of the first sensitization,group C received external application of medicinal disc(mainly composed of Semen Sinapis, Rhizoma Corydalis,Herba Asari,Radix Kansui,Fructus Xanthii,etc.) on Dazhui (GV14)point,group D received intraperitoneal injection of 0.1?g/L dexamethasone(0.5?mL for each mouse) one hour before nasal dripping of OVA solution,and group E received external application of paper disc on Dazhui point and intraperitoneal injection of(0.1?g/L) PBS(0.5 mL for each mouse) one hour before nasal dripping of OVA solution,qd,for 4 weeks.After treatment,the mice were executed and the nasal mucosa was fixed in 4% paraformaldehyde.Routine paraffin slices were prepared and stained by haematoxylin and eosin.The pathological features of nasal mucosa were observed under light microscope,and eosinophil(EOS),neutrophil and lymphocyte count was performed in different groups.【Results】Compared to group A,the infiltration of EOS and neutrophil in nasal mucosa was obvious in group B(P0.05).【Conclusion】The infiltration of EOS in nasal mucosa plays an important role in the pathogenesis of allergic rhinitis and the decrease of EOS infiltration may be one of the therapeutic mechanism of external application of herbal drugs on acupoints for allergic rhinitis.