白细胞介素-1受体拮抗剂抑制大鼠高危角膜移植免疫排斥反应的实验研究

目的 观察白细胞介素-1受体拮抗剂(IL-1ra)抑制大鼠高危角膜移植后免疫排斥反应、促进植片存活的作用。方法 对40只SD大鼠(40眼)用缝线法诱导角膜新生血管增生,选取其中的30只大鼠(30眼)并随机分为实验Ⅰ、Ⅱ组及对照组Ⅲ组,每组均接受同种异系(Wistar大鼠)供体角膜,行穿透性角膜移植术。实验组于术后第1日起分别滴用50 μg/ml的IL-1ra滴眼液(Ⅰ组)和1%的CsA滴眼液(Ⅱ组),每日3次。受试动物术后均每日滴用典必殊滴眼液及托品卡胺滴眼液3次,连续14 d。术后比较各组大鼠免疫排斥反应发生的时间,对角膜植片存活情况进行评分,观察其效果。结果 两实验组角膜植片平均存活时间分别为(12.00±1.50) d和(10.44±1.13) d,明显高于对照组(8.00±1.25) d,差异有显著性(P<0 01);两实验组间比较,差异亦有显著性(P<0 01)。结论 IL-1ra可抑制高危角膜移植后的免疫排斥反应,减少新生血管的生成,减轻免疫性炎性反应,延长角膜植片的存活时间。

Subconjunctival interleukin-1 receptor antagonist inhibits graft rejection following high-risk penetrating keratoplasty in rats

Objective To observe the roles of subconjunctival administration of interleukin-1 receptor antagonist (IL-1ra) promoting corneal graft survival in rat models of high-risk penetrating keratoplasty. Methods Corneal vascularization was induced in 40 Sprague-Dawley rats (40 eyes) by passing 10-0 silk suture through the corneal stroma, and 30 of these rats received corneal grafts from Wistar rats to establish high-risk keratoplasty models and were divided into 3 groups to receive their respective treatment with IL-1ra eye drops (50 μg/ml), 1% CsA eye drops, administered 3 times a day, or no treatment. All the rats were treated by Tobra Dex eye drops and Tropicamid eye drops, 3 times a day for 14 consecutive days after the operation. During the 30-day observation, the survival of the grafts was recorded, and all the grafts were evaluated for signs of rejection. Results The mean survival times (MST) of the grafts of the treatment groups with IL-1ra and CsA were 12.00±1.50 d and 10.44±1.13 d respectively, significantly longer than that in the untreated model group (8.00±1.25 d, t=0.00, P<0.01), and the difference in the MST between the 2 treatment groups was also significant (t=0.00, P<0.01). Conclusion Treatment with IL-1ra may significantly prolong high-risk corneal allograft survival.