医药学论文:雷公藤内酯与CsA联合抗大鼠异种角膜移植排斥
【关键词】 雷公藤内酯;环孢素A;移植排斥;角膜移植
Combination therapy of triptolide and cyclosporine A resist xenocorneal transplant rejection
【Abstract】 Objective A xencorneal penetrating keratoplasty model was established in Wistar rat and investigated the effect of anti-rejection by combination therapy under CsA and triptolide. Methods After the corneal of Guinea-pig was transplanted into the eye of Wistar rat, we injected 100μg/kg body weight of triptolide, 15mg/kg body weight of CsA and 100μg/kg + 10mg/kg of triptolide and CsA for anti-rejection. The observations on the effect of different anti-rejection agents base the method of Holland and immunochemistry. Results (1)Clinical observation had shown more long-term survival in xenocorneal recipients with combination therapy than triptolide or CsA separating therapy. (2)The changes of percent of CD8+ cell in combination therapy group was less than other therapy groups and percent of IL-2R+ cell in combination therapy group and CsA group was less than triptolide group(P<0.05).(3)15 days after keratoplasty, there were a few lymphocytes infiltrating the graft cornea in combination therapy group and excel other therapy groups.Conclusion Tiptolide and CsA have a synergetic effect on preventing and treating transplant rejection.
【Key words】 triptolide;CsA;transplant rejection;keratoplasty
历史上,因移植角膜的特惠性生存使眼部被视为具有免疫赦免性的器官之一。最近的研究表明,角膜具有和机体其它器官相似的免疫成分和免疫体系,角膜的免疫赦免是相对的。角膜移植术后,排斥反应的发生率仍为10%~65%,因此和其它组织、器官移植一样,角膜移植排斥是角膜移植术后继发移植失败的最常见的原因,而且有着与前者相似的排斥机制[1]。即:(1)创伤修复和炎症期;(2)移植抗原致敏期;(3)激活免疫活性细胞;(4)移植物(植片)受损期。我们应用大鼠异种穿透性角膜移植的动物模型,研究雷公藤内酯与环孢素A(cyclosporin A,CsA)联合用药抗移植排斥的效果。
1 材料
1.1 实验动物 Wistar 大鼠2~3月龄,180~220g,雄性18只,豚鼠(英国种短毛)2~3月龄,200~230g,雄性9只。由第一军医大学动物实验中心提供,清洁级。
1.2 免疫组化试剂 小鼠抗大鼠T淋巴细胞亚群W/OX系列单克隆抗体MaRTh/i(W3/5),MaRTc/s(OX-8),MaR Ia(OX-6),MaR IL-2R(ART-18),MaR WBC(W 6/32)均由军事医学科学院进口分装。ABC显色试剂盒为Dako公司产品。
1.3 抗排斥药物 雷公藤内酯注射液为福建省药物研究所提供,CsA注射液为瑞士SANDOZ公司产品。
2 方法
2.1 大鼠异种穿透性角膜移植术(右眼) (1)麻醉:2%戊巴比妥钠按1mg/kg腹腔内注射,0.5%地卡因眼液点术眼,2%普鲁卡因0.2ml球后注射。(2)植片制作:豚鼠处死后,0.8%庆大霉素眼液冲洗结膜囊,沿角膜巩缘剪下角膜,以直径4.5mm环钻从内皮面压切成植片。(3)角膜移植:以直径4mm环钻,钻切角膜大深层,以尖刀挑穿后沿钻切口剪下角膜,将植片放置于植床上,11-0尼龙线间断缝合12针,复方NaCl注射液注入形成前房,四环素眼膏涂眼。
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