简介：目的：观察链脲佐菌素（STZ）诱发糖尿病大鼠在造模后血-视网膜屏障（blood—retinabarrier，BRB）变化情况，并以阳性药为对照研究中药芪灯明目胶囊对STZ诱发糖尿病大鼠的视网膜血管渗漏影响。方法：采用STZ腹腔注射制作糖尿病大鼠模型，在造模后6too内各时点（2wk；1，2，3，4，5，6mo）采用伊文思蓝灌注示踪显示血一视网膜的渗漏情况，在造模后3too开始用中药芪灯明目胶囊（低中高剂量组分别给予125，250，500mg／kg体质量剂量的胶囊内容物灌胃），对照组用安多明胶囊（200mg／kg体质量剂量，相当于10倍成人剂量），灌胃3mo，观察药物对BRB的影响。结果：STZ糖尿病大鼠在2wk即可出现BRB的损害，并随着高血糖状态的持续而不断加重。对造模3tooSTZ糖尿病模型大鼠连续灌胃中药芪灯治疗3mo，结果提示：中药芪灯对STZ糖尿病BRB有保护作用，可明显减少视网膜血管的渗漏。结论：STZ糖尿病模型大鼠在早期即可出现BRB损害，并随着高血糖的持续而加重，中药芪灯明目胶囊可减少高血糖导致的BRB损害。

简介：AIM:ToexploretheinhibitoryeffectofasustainedcyclosporinA(CsA)deliverymicrosphere(CsA-MS)onposteriorcapsularopacification(PCO)inrabbiteyesaftercataractextraction.·METHODS:TwentyNewZealandwhiterabbitsacceptedcataractextractionplusintraocularlensimplantationandtheirlefteyeswereintraoperativelyinjectedCsA-MSpreparedusingpolymerpolylactioglycolicacid(PLGA)asacarrierandtheirrighteyeswereinjectedwithemptyMS.Thechangesincornea,anteriorchamberreaction,intraocularpressure,PCOandCsAconcentrationinaqueoushumorwereexaminedpostoperativelyandalltheeyeswereenucleated3monthsaftersurgeryforhistopathologicalandmorphologicalexaminationwithlightmicroscopyandelectronmicroscopy.·RESULTS:Conjunctivalhyperemia,cornealedema,intraocularpressureandanteriorchamberresponseofexperimentalandcontroleyesweresimilar,whilePCOinCsAMSinjectedeyeswasgreatlyimprovedcomparedwiththatincontroleyes.PosteriorcapsulesinCsA-MSinjectedeyesweresmoothandlensepithelialcells(LEC)didnotproliferatesignificantly(P>0.05),whileLECinposteriorcapsuleofcontroleyeshaddifferentdegreesofproliferationandcorticalregeneration.LECinCsA-MSinjectedeyeswerenotfunctionallyactiveandunderwentapoptosis,whereasLECincontroleyeswerefunctionallyactive(F-test,P=0.025).Inaddition,thecornealultrastructureshowednodifferencesbetweenCsA-MSandMSinjectedeyes.CONCLUSION:CsA-MShashighbioavailabilityinrabbiteyesandcouldinhibitpostoperativePCOoccurrenceanddevelopmentduringthestudyperiod,suggestingthatCsA-MSmaybeapromising,effectiveandsafeadministrationroutetopreventPCOinclinic.