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目的:观察整合素连接激酶-小干扰RNA-特异性腺相关病毒(ILK-siRNA-AAV)对大鼠青光眼滤过术后滤过通道瘢痕形成的抑制作用。方法:选取SPF级8~9周龄SD大鼠48只，采用随机数表法将其分为空白对照组、ILK-siRNA-AAV组、NC-siRNA-AAV组和丝裂霉素C(MMC)组，每组12只。每只大鼠均取左眼为实验眼，右眼不做特殊处理。采用前房植入引流管法建立大鼠青光眼滤过术球结膜滤过泡模型，空白对照组、ILK-siRNA-AAV组和NC-siRNA-AAV组术后1 d滤过泡内分别注入磷酸盐缓冲液、ILK-siRNA-AAV和NC-siRNA-AAV各5 μl，MMC组术中采用含0.4 mg/ml MMC的小棉片置于结膜瓣下5 min。术前及术后1、2、3、7、14、21、28 d，采用手持式眼压计测量术眼眼压；术后1、2、3、7、14、21、28 d，采用手术显微镜观察术眼滤过泡形成情况，采用Kaplan-Meier生存分析计算滤过泡生存天数；术后28 d，采用逆转录PCR及Western blot法检测术区结膜及结膜下组织中ILK的mRNA及蛋白表达，检测ILK基因沉默效应；采用苏木精-伊红染色观察n ILK基因沉默对滤过通道组织形态的影响；采用Masson染色观察n ILK基因沉默对球结膜滤过泡术区组织胶原纤维沉积作用，计算胶原纤维染色阳性面积占整个组织视野面积的百分比。n 结果:各组大鼠手术前后不同时间点眼压总体比较，差异均有统计学意义(n F分组＝76.84，n P<0.001；n F时间＝114.49，n P<0.001)，其中ILK-siRNA-AAV组术后第1、7、14和28天眼压均低于空白对照组，MMC组术后第2、3、7、14和28天眼压均低于空白对照组，ILK-siRNA-AAV组术后第7、14、21和28天眼压均低于NC-siRNA-AAV组，差异均有统计学意义(均n P<0.05)。Kaplan-Meier生存分析结果显示，空白对照组、NC-siRNA-AAV组、ILK-siRNA-AAV组和MMC组滤过泡生存天数分别为(3.50±1.51)、(5.00±3.41)、(31.50±3.15)和(31.33±2.46)d，总体比较差异有统计学意义(n F＝395.83，n P<0.05)，其中ILK-siRNA-AAV组和MMC组滤过泡生存天数均多于空白对照组和NC-siRNA-AAV组，差异均有统计学意义(均n P<0.05)。各组ILK mRNA及蛋白相对表达量总体比较差异均有统计学意义(n F＝222.32、752.69，均n P<0.05)，其中ILK-siRNA-AAV组ILK mRNA及蛋白相对表达量明显低于空白对照组和NC-siRNA-AAV组，差异均有统计学意义(均n P<0.05)。苏木精-伊红染色结果显示，空白对照组和NC-siRNA-AAV组术区纤维结缔组织增生，细胞大量增生，成纤维细胞密度高，呈团块状生长；ILK-siRNA-AAV组球结膜较薄，纤维结缔组织排列疏松，少量成纤维细胞增生；MMC组结膜纤维层疏松、菲薄，形成空洞，细胞稀少。各组胶原纤维染色阳性面积百分比总体比较差异有统计学意义(n F＝741.66，n P<0.05)，其中与空白对照组比较，ILK-siRNA-AAV组和MMC组阳性染色百分比显著降低，ILK-siRNA-AAV组阳性染色百分比明显低于NC-siRNA-AAV组，差异均有统计学意义(均n P<0.05)。n 结论:ILK-siRNA-AAV沉默ILK表达可抑制大鼠滤过术后滤过区组织瘢痕形成，降低眼压。“,”Objective:To investigate the role of integrin-linked kinase (ILK)-small interfering RNA (siRNA)-adeno-associated virus (AAV) in scar formation after glaucoma filtering surgery in rat eyes.Methods:Forty-eight Sprague Dawley rats of SPF grade, aged 8 to 9 weeks old, were selected and divided into blank control group, ILK-siRNA-AAV group, NC-siRNA-AAV group and mitomycin C (MMC) group by random number table method, with 12 rats in each group.Left eyes of the rats were taken as experimental eyes, and no intervention was administered to fellow eyes.The bulbar conjunctival filtering bleb after glaucoma filtration surgery in rats was established by anterior chamber drainage tube implantation.One day after operation, phosphate buffer solution, ILK-siRNA-AAV, and NC-siRNA-AAV were injected into the filtering bleb of blank control group, ILK-siRNA-AAV group and NC-siRNA-AAV group, 5 μl each group, respectively.Cotton tablets containing 0.4 mg/ml MMC were placed under conjunctival flap for 5 minutes during operation in MMC group.Intraocular pressure (IOP) was measured with a handheld tonometer before surgery and at 1, 2, 3, 7, 14, 21, 28 days after surgery.Formation of filtering blebs in rats was observed with a surgical microscope at 1, 2, 3, 7, 14, 21, 28 days after operation, and the bleb survival time was calculated by Kaplan-Meier survival analysis.The mRNA and protein expression levels of ILK in conjunctival and subconjunctival tissues at the surgical sites were detected by reverse transcription PCR and Western blot, respectively, on the 28th day after operation.Silencing of n ILK gene was identified.Effect of n ILK gene silencing on the morphology of drainage pathway was observed by hematoxylin-eosin staining.Effect of n ILK gene silencing on collagen fiber deposition in the bulbar conjunctiva at filtration area was examined by Masson staining, and the percentage of positive area of collagen fiber staining in the total tissue visual field was calculated.The use and care of the animals complied with the ARVO Statement.This research protocol was approved by an Ethics Committee of Xi\'an Jiaotong University (No.2013-772).n Results:There were statistically significant differences in IOP at different time points between before and after surgery among four groups (n Fgroup=76.84, n P<0.001;n Ftime=114.49, n P<0.001). The IOP of ILK-siRNA-AAV group on the 1st, 7th, 14th and 28th day after operation and the IOP of MMC group on the 2nd, 3rd, 7th, 14th and 28th day after operation were lower than those of blank control group, and the differences were statistically significant (all atn P<0.05). The IOP of ILK-siRNA-AAV group was lower on 7th, 14th, 21st and 28th day after operation than those of NC-siRNA-AAV group, with statistically significant differences (all atn P<0.05). The bleb survival time of blank control group, NC-siRNA-AAV group, ILK-siRNA-AAV group and MMC group was (3.50±1.51), (5.00±3.41), (31.50±3.15) and (31.33±2.46) days, respectively, with a significant difference among them (n F=395.83, n P<0.05). The bleb survival time of ILK-siRNA-AAV group and MMC group was higher than that of blank control group and NC-siRNA-AAV group, and the differences were statistically significant (all atn P<0.05). There were statistically significant differences in the relative expression levels of ILK mRNA and protein among four groups (n F=222.32, 752.69; both at n P<0.05), and the relative expression levels of ILK mRNA and protein were significantly lower in ILK-siRNA-AAV group than blank control group and NC-siRNA-AAV group, and the differences were statistically significant (all atn P<0.05). Proliferative fibrous connective tissue and a large number of cells at surgical sites were found in blank control group and NC-siRNA-AAV group, and the fibroblasts were of a high density and grew in clumps.In ILK-siRNA-AAV group, the bulbar conjunctiva was thin, and the arrangement of fibrous connective tissue was loose, and a few proliferative fibroblasts were found.In MMC group, the conjunctival fibrous layer was loose and thin, forming cavities, and scarce cells were found.There was statistically significant difference in the percentage of collagen fiber positive staining area among four groups (n F=741.66, n P<0.05). The positive staining percentage of ILK-siRNA-AAV group and MMC group was significantly lower than that of blank control group, among which there was lower positive staining percentage in ILK-siRNA-AAV group than NC-siRNA-AAV group, and the differences were statistically significant (all atn P<0.05).n Conclusions:Silencing of n ILK can inhibit the scar formation after glaucoma filtering surgery and maintain low IOP in rats.n