机构地区:[1]华中科技大学同济医学院附属协和医院眼科,湖北武汉430022
出 处:《中华眼视光学与视觉科学杂志》2011年第3期191-197,共7页Chinese Journal Of Optometry Ophthalmology And Visual Science
摘 要:目的观察法舒地尔对大鼠急性高眼压视网膜神经节细胞(RGCs)的保护作用并探讨其机制。方法实验研究。24只SD大鼠被随机分人正常组(N组)、模型组(M组)、模型+磷酸缓冲液组(MP组)、模型+法舒地尔组(F组),正常组不做任何处理,后三组制作急性高眼压模型(生理盐水灌注法)。其中MP组和F组于造模前l周、当天及其后每天分别腹腔注射磷酸缓冲液(PBS)25mg/kg和法舒地尔25mg/kg,各组于造模后7d取眼球和心脏血,采用TUNEL法测定RGCs凋亡指数(AI)反映RGCs凋亡情况,免疫组化法观察各组视网膜中Rho激酶-2(ROCK-2)和内皮素fET-1)的分布,并用吸光度值(OD)反映各自表达量;采用Western blotting法测定各组视网膜中磷酸化的肌球蛋白磷酸酶靶单位(p-MYPT-1)的表达,放射免疫法测定血浆中ET-l含量,血液流变仪测量不同剪变率下的全血黏度、红细胞聚集指数(BCAD和红细胞压积(HCT)。各指标组问比较采用单因素方差分析,两两比较采用俗D-t检验。结果各组RGCsAI差异具有统计学意义(F=402.041,P=0.000),其中F组RGCsAI为33.3%±2.0%,少于M组(64.3%±2.2%)或MP组(62.5%±2.2%)(P〈0.05)。N组视网膜的节细胞层(GCL)中仅散在几个ROCK-2和ET一1阳性细胞,M、MP和F组ROCK一2阳性细胞分布于GCL、内丛状层(IPL)、内核层(INL)、外丛状层(OPL)和外核层(ONL)中.而ET.1阳性细胞分布于前4层,ONL中无表达,且两者在M和MP组中的DD值高于N组(N、M及MP组ROCK-2:0.21±0.03、0.52±0.06、0.54±0.03;ET-1:0.22±0。05、0.5l±0.03、0.51±0.04)(P均〈O.01),F组DD值(ROCK-2:0.37±0.04;ET-1:0.35±0.06)低于M或MP组(P均〈0.05),但仍高于N组(P均〈0.05)。ROCK-2和ET-1在各组表达差异具有统计学意义(F=82.862、56.491,P=0�Objective To investigate the neuroprotective effect of fasndil for retinal ganglion cells and its mechanism research in rat acute elevated intraocular pressure (IOP). Methods Experimental study. Twenty-four SD rats were divided into 4 groups at random: N group (normal), M group(model), MP group (model+PBS: began PBS i.p. 25mg/kg qd a week before the operation) and F group(model+Fasudil: began Fasudil i.p. 25 mg/kg qd a week before the operation). Excavating their eyeballs and collectting blood from their hearts Th day after operation, which was established by increasing IOP to 110 mmHg (lasting 60 minutes) through intra-anterior chamber infusion of saline solution, TUNEL was employed to observe apoptosis of retinal ganglion cells (RGCs) through apoptosis index (A/), immuno-histological assay to carry out on paraffin sections of retina and to research the distribution and expression with average optical density (OD) of Rho-associated kinase-2 (ROCK-2) and endothelin-1 (ET-1), Western blotting to view the expression of phosphorylated-myosin phosphatase target subunit-1 (p-MYPT-1), radio-immunity assay to survey the content of ET-1 in blood plasma, and blood rheometer to measure the blood viscosities, blood cell aggregation index (BCAI) and hematocrit (HCT). The results were analyzed using one-way ANOVA and LSD-t test. Results In TUNEL: there was remarkable difference in RGCs AI among the 4 groups (F=402.041, P=0.000). AI in F group [(33.3±2.0)%] was obviously decreased compared with M [(64.3±2.2)%] or MP [(62.5±2.2)%] group (P〈 0.05). In immuno-histological assay: in N group ROCK-2 or ET-1 was only distributed in ganglion ceils layer (GCL) and not found in other layers. The distribution of ROCK-2 in M, MP or F group was in GCL, inner plexiform layer (IPL), inner nuclear layer (INL), outer plexiform layer (OPL) and outer nuclear layer (ONL), and ET-1 was in anterior 4 layers, but not ONL. Meanwhile, the
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...