兔眼小梁切除术后结缔组织生长因子的表达

目的 研究结缔组织生长因子(CTGF)在兔眼小梁切除术后滤过泡中的表达及意义.方法 对照实验研究.将49只健康家兔分为5组:正常眼未手术组(A组),高眼压未手术组(B组),高眼压模型小梁切除术组(C组),正常眼小梁切除术组(D组),正常眼假手术组(E组),并分别在术后第2、5、7、14及21天,取右眼滤过泡部位的球结膜和浅层巩膜组织,A组和B组作为对照组.采用RT-PCR法检测CTGF mRNA的相对表达量,应用免疫组织化学方法 检测CTGF蛋白表达水平,HE染色行组织病理学检查.采用SAS 9.1.3统计学软件,对逆转录聚合酶链反应(RT-PCR)和免疫组织化学检测结果 采用析因设计定量资料方差分析.结果 C、D、E组术后CTGF表达水平高于A组和B组,术后第5天CTGF表达水平达到高峰,与其他时间点的表达差异有统计学意义(F=19.54,P<0.05);术后第2和5天,CTGF mRNA表达水平,C组高于同期D组(t=2.300,5.140;P<0.05);术后第2、5、7、14天,D组高于同期E组(t=-2.927,-6.424,-4.176,-4.997,P<0.05).CTGF蛋白表达水平,术后第2、5、7、14天,C组高于同期D组(t=-7.147,-10.955,-9.900,-6.385,P<0.05);术后第2、5、7、14天,D组高于同期E组(F=68.33,P<0.05).组织病理学检查结果 显示,术后第5天,C、D、E组局部炎性反应达高峰,表现为中性粒细胞、单核细胞及巨噬细胞浸润,成纤维细胞增殖达高峰.结论 小梁切除术后家兔CTGF表达水平的变化趋势表明,CTGF在伤口愈合及瘢痕形成过程中可能起重要作用,高眼压状态可促进CTGF表达水平上调.(手华眼科杂志,2009,45:168-174)

Expression of connective tissue growth factor after trabeculectomy in rabbits

Objective To investigate the role of connective tissue growth factor (CTGF) after trabeculectomy associated with wound healing and to identify the role of CTGF in this process. Methods It was a experimental study. Forty-nine rabbits were used and divided into 5 groups: normal eyes without trabeculectomy group (group A), ocular hypertension (OHT) model without trabeculectomy group (group B), OHT model with trabeculectomy group (group C), normal eyes with trabeculectomy group (group D) and normal eyes with sham operation group (group E). Group A and B were as control CTGF mRNA was detected by RT-PCR using blebs and tissues harvested at day 2, 5, 7, and 14. Three replicates of three blebs per time point in the right eyes were collected. The expression of CTGF protein was detected by immunohistochemistry and inflammatory histopathology was inspected by HE staining using the whole eyeball harvested in the left eyes. Results Compared to group A and B, the expression of CTGF was significantly increased at day 5 after surgery (F=19.54, P<0.05) in group C, D, and E. The expression of CTGF mRNA in group C is significantly higher than that in group D at day 2 and 5 (t=2.300,5.140,P <0.05), while group D is significantly higher than that in group E at day 2, 5, 7, and 14 (t=-2.927, -6.424, -4.176, -4.997, P<0.05). The expression of CTGF protein in group C is significantly higher than that in group D (t=-7.147, -10.955, -9.900, -6.385, P<0.05), and group D is higher than that in group E (F=68.33,P<0.05) at day 2, 5, 7, and 14, respectively. Inflammatory reaction reached peak at day 5 after surgery in group C, D, and E showing an infiltration of neutrophil, monocytes, macrophagus, and the proliferation of fibroblast. Conclusions Overexpression of CTGF in the blebs after trabeculectomy demonstrates that CTGF may play an important role in the process of wound healing. Furthermore, ocular hypertension may be involved in the upregulation of CTGF expression. (Chin J Ophthalmol, 2009,45:168-174)