目的：采用不同方法构建乳鼠过敏性结膜炎免疫耐受模型，观察生命早期环境因素对过敏性结膜炎的影响。

方法：Balb/c乳鼠50只随机分为空白对照组、卵清蛋白(OVA)+皮下注射组、OVA+雾化吸入组、OVA+灌胃组、豚草花粉(RW)+皮下注射组、RW+雾化吸入组、RW+灌胃组、屋尘螨(HDM)+皮下注射组、HDM+雾化吸入组、HDM+灌胃组(n=5只/组)。除空白对照组外，各处理组乳鼠分别诱导免疫耐受，成年后再予以相应抗原。通过眼前段照相观察眼表情况，RT-qPCR法检测结膜RANTES、IL-17 mRNA相对表达水平，并通过ELISA法检测血清IL-17浓度。

结果：与空白对照组相比，结膜IL-17 mRNA相对表达水平在RW+灌胃组增高最为显著，RW+皮下注射组增高程度最低(均P<0.05)； 结膜RANTES mRNA相对表达水平在RW+灌胃组增高最为显著(P<0.001)。与空白对照组相比，除OVA+雾化吸入组和RW+皮下注射组外，其他处理组小鼠血清IL-17浓度增高(P<0.05)。

结论：小鼠生命早期皮下注射诱导过敏性结膜炎免疫耐受状态最佳。

METHOD: A total of 50 Balb/c newborn mice were randomly divided into blank control group, ovalbumin(OVA)+subcutaneous injection group, OVA+nebulized inhalation group, OVA+gastric group, ragweed pollen(RW)+subcutaneous injection group, RW+nebulized inhalation group, RW+gastric group, house dust mite(HDM)+subcutaneous injection group, HDM+nebulized inhalation group, HDM+intragastric group(n=5 animals/group). Except for the blank control group, mice in each group were individually exposed to the corresponding antigens to induce immune tolerance early in life and stimulated with the corresponding antigens in adulthood. The ocular surface was visualized by anterior segment photography. The relative expression level of conjunctival RANTES and IL-17 mRNA was measured by RT-qPCR and serum IL-17 concentration was measured by ELISA.

RESULTS: Compared with the blank control group, the relative expression level of conjunctiva IL-17 mRNA in RW+gastric group was the highest, and it was the lowest in RW+subcutaneous group(all P<0.05). The relative expression level of conjunctiva RANTES mRNA was the highest in RW+gastric group(P<0.001). Compared with the blank control group, the serum concentration of IL-17 was increased in all treatment groups except OVA+nebulizer group and RW+subcutaneous group(P<0.05).

CONCLUSION: The immune tolerance of allergic conjunctivitis induced by subcutaneous injection of antigen was the most suitable method in the early life of mice.