简介：目的：探索相对稳定性强、一致性好的大鼠角膜碱烧伤动物模型。方法：将87只SD大鼠分为角膜缘碱烧伤20s组（A组。34只），角膜缘碱烧伤40s组（B组，23只），角膜中央碱烧伤40s组（C组，30只），用浸润1mol／L氢氧化钠的滤纸片，分别烧灼大鼠角膜缘和角膜中央，术后7d裂隙灯显微镜观察角膜透明度、角膜溃疡及角膜新生血管情况，并记录上述指标。结果：角膜缘碱烧伤（B组）较角膜中央烧伤（c组）溃疡发生率、角膜穿孔率和角膜上皮荧光素钠染色阳性率高，且有统计学差异（P〈0．05）；角膜缘烧灼时间长组（B组）溃疡发生率及角膜穿孔率高于角膜缘烧灼时间短组（A组），且有统计学差异（P〈0．05）；烧灼角膜缘和角膜中央（A，B，c组）均能诱导出角膜新生血管。结论：对于研究角膜新生血管的动物模型，以选择3mm圆形滤纸片角膜中央烧伤为佳；对于研究角膜缘干细胞缺乏所致角膜病变的实验，以选择环形滤纸片放置于角膜缘20s为佳。

简介：AIM:Toinvestigatethecharacteristicsandcriterionofgraftrejectioninmicemodel.METHODS:C57BL/6orBALB/cmicecornealgraftsweregraftedontoBALB/chosts.Eachgroupwasdividedintotwosubgroupsaccordingtothecornealopacityscores12daftertransplantation.Thecharacteristicsofopacityandneovascularizationwereobserved.Miceofthe12th,50thdayaftertransplantation,thegraftsbiopsyofmiceinallogeneicgroup1,whichopacityscoreexceed3,werepreparedforhistologicalobservationandthoserestoretransparentwereendothelialstained.RESULTS:Therewasnodifferenceofcornealopacityscoreonthe7thand12thdayafteroperation;thehistologicalresultshadnodisparitybetweensyngeneicgroupandallogeneicgroup.Onthe12thdayaftersurgery,theturbiditycurvewasapparentingraftswithopacityscore<2.Mononuclearcellswereshowningraftswithopacityscorereached3inallogeneicgroup1.Differentrejectionperformancewasobservedintissuesectionsonthe50thdayaftersurgery.CONCLUSION:Grafts,opacityscoreexceeds3fromthe7thtothe12thdayafteroperationcouldnotbejudgedasarejection.Weshouldpaymoreattentiontothevariationofgraftsopacitysince12daftercornealtransplantation.