[关键词]
[摘要]
目的 通过比较 2, 4-二硝基氯苯(2, 4-Dinitrochlorobenzene,DNCB)诱导特应性皮炎(Atopic Dermatitis,AD) 小鼠疾病模型、“外湿+饮食失节+番泻叶灌胃”复合因素诱导脾虚湿蕴证小鼠模型,以及两者 病证结合模型,建立特应性皮炎脾虚湿蕴病证结合小鼠研究模型,探索该方法的可行性。方法 采用“外湿+ 饮食失节+番泻叶灌胃”复合因素造模方法,探索构建小鼠 (Balb/c) 脾虚湿蕴证,进一步应用 DNCB 诱导 Balb/c 小鼠出现特应性皮炎样病变,建立脾虚湿蕴证特应性皮炎病证结合模型。观察各组小鼠一般情况及体质量,进 行脾虚、湿证症状评分;通过比较各组皮损程度、EASI 评分、经皮水分散失 (TEWL) 值、脾脏系数和胸腺系数 评价小鼠特应性皮炎严重程度;测定小鼠肌酐、葡萄糖、总胆固醇、甘油三酯、胃泌素、淀粉酶水平。结果 (1) 在 脾虚湿蕴证造模期间,与正常组比较,脾虚湿蕴证组、脾虚湿蕴型特应性皮炎组小鼠出现肥胖、精神萎靡、毛 发污秽油腻、腹泻、肛周清洁度差等情况。在结合施加特应性皮炎模型后,与正常组比较,特应性皮炎组 (P<0.001) 、脾虚湿蕴证组 (P<0.05) 、脾虚湿蕴型特应性皮炎组 (P<0.001) 的体质量都有所降低。 (2) 与特应 性皮炎组比较,脾虚湿蕴型特应性皮炎组的皮损程度更严重,EASI 评分 (P<0.05) 、TEWL 值 (P>0.05) 更高。 (3) 与正常组比较,特应性皮炎组的脾脏系数升高 (P<0.001) 、胸腺系数降低 (P<0.001) ;与特应性皮炎组比 较,脾虚湿蕴型特应性皮炎组脾脏系数 (P>0.05) 、胸腺系数都降低 (P<0.05) 。 (4) 血清生化指标结果显示,与 正常组比较,脾虚湿蕴证组小鼠肌酐 (P<0.01) 、葡萄糖 (P<0.001) 、总胆固醇 (P>0.05) 、甘油三酯 (P> 0.05) 、胃泌素 (P<0.001) 水平升高,淀粉酶水平降低 (P<0.01) ;与特应性皮炎组比较,脾虚湿蕴型特应性皮 炎组小鼠肌酐 (P>0.05) 、葡萄糖 (P<0.05) 、总胆固醇 (P>0.05) 、甘油三酯 (P>0.05) 、胃泌素 (P<0.001) 水 平升高,淀粉酶水平降低 (P>0.05) 。结论 “外湿+饮食失节+番泻叶灌胃”复合因素结合 DNCB 诱导特应性皮 炎脾虚湿蕴病证结合小鼠模型既可表现出明显的脾虚湿蕴证中医指征,也可表现出特应性皮炎病样特征,可作为可靠的特应性皮炎脾虚湿蕴证中医病证结合动物模型,为后续脾虚湿蕴型特应性皮炎病理机制探讨、中药复 方药效评价、药理机制探讨等方面研究提供参考。
[Key word]
[Abstract]
Objective To establish a mouse model of spleen deficiency and dampness stagnation syndrome combining atopic dermatitis (AD) and explore the feasibility of modeling by comparing 2, 4-dinitrochlorobenzene (DNCB) -induced atopic dermatitis model of mouse,"external dampness + improper diet + irrigation of senna"-induced spleen deficiency and dampness stagnation syndrome model of mouse,as well as both in combination of model mouse. Methods The construction of a mouse (Balb/c) with spleen deficiency and dampness stagnation syndrome was explored by using the method of "external dampness + improper diet + irrigation of senna",and then DNCB was applied to induce the AD-like lesions in Balb/c mice to establish a mouse model of spleen deficiency and dampness stagnation syndrome combining atopic dermatitis. The general condition and body weight of mice in each group were observed,and the symptoms of spleen deficiency and dampness were scored. The severity of AD was evaluated by comparing the skin lesion degree,EASI score,transcutaneous water loss value(TEWL),spleen index and thymus index. The levels of creatinine, glucose, total cholesterol, triglyceride, gastrin, and amylase were measured. Results(1) During the modeling period of spleen deficiency and dampness stagnation syndrome,compared with the normal group, spleen deficiency and dampness stagnation syndrome group, spleen deficiency and dampness stagnation syndrome combined with atopic dermatitis group showed obesity,listlessness,filthy and greasy hair, diarrhea,and poor cleanliness around the anal. After combining with the application of the atopic dermatitis model, the body weight of the mice in atopic dermatitis group (P<0.001),spleen deficiency and dampness stagnation syndrome group (P<0.05) and spleen deficiency and dampness stagnation syndrome combined with atopic dermatitis group 0.001 decreased sharply compared with the normal group. 2 Compared with the atopic dermatitis group,the degree of skin lesions,EASI score (P<0.05) and TEWL (P>0.05) were higher in the spleen deficiency and dampness stagnation syndrome combined with atopic dermatitis group.(3)Compared with the normal group,the spleen index of the atopic dermatitis group increased(P<0.001)and the thymus index decreased (P<0.001). Compared with the atopic dermatitis group,the spleen index(P>0.05)and thymus index(P<0.05) of the spleen deficiency and dampness stagnation syndrome combined with atopic dermatitis group decreased. (4) The results of serum biochemical indexes showed that compared with the normal group,the levels of creatinine (P<0.01),glucose (P<0.001),total cholesterol (P>0.05),triglyceride (P>0.05) and gastrin (P<0.001) in the spleen deficiency and dampness stagnation syndrome group were increased,and the level of amylase was decreased (P<0.01). Compared with the atopic dermatitis group,the levels of creatinine (P>0.05),glucose (P<0.05),total cholesterol (P>0.05),triglyceride (P>0.05),gastrin (P<0.001) increased and the level of amylase decreased(P>0.05). Conclusion A mouse model of spleen deficiency and dampness stagnation syndrome combining atopic dermatitis,which was induced by the combination of DNCB and "external dampness + improper diet + irrigation of senna",can not only show obvious TCM indications of spleen deficiency and dampness syndrome, but also show the characteristics of AD. This model can be used as a reliable animal model of combination of disease and syndrome. It provides reference for further study on pathological mechanism,pharmacodynamic evaluation and pharmacological mechanism of spleen deficiency and dampness stagnation syndrome combining atopic dermatitis.
[中图分类号]
R-332;R285.5
[基金项目]
广东省重点领域研发计划项目 (2020B1111100010);省部共建中医湿证国家重点实验室项目 (SZ2021ZZ17,SZ2021ZZ39);市校 (院) 企联合资助项目 (2024A03J0544);粤港澳中医药与免疫疾病研究联合实验室项目 (2020B1212030006);广州中医药大学“双一流”与高水平 大学学科协同创新团队项目 (2021XK08);广州科技局农业和社会发展科技专题 (2023B03J0562)。