放射性视神经损伤模型的制作  被引量:1

Model making of radioactive optic nerve injury

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作  者:程先华[1] 古学军[1] 李志英[2] 冀建平[2] 

机构地区:[1]南昌大学附属眼科医院神经眼科,330006 [2]广州中医药大学第一附属医院眼科,510405

出  处:《中华实验眼科杂志》2016年第12期1092-1096,共5页Chinese Journal Of Experimental Ophthalmology

基  金:广东省科技计划项目(2009B060700071)

摘  要:背景放射性视神经病变(RION)是头颈部肿瘤接受放射治疗后严重的并发症,严重威胁患者的视力及生活质量,目前尚无公认的有效治疗方法。建立理想的放射性视神经损伤动物模型对于研究RION的自然病程、预防和治疗具有重要意义。目的建立一种较理想的放射性视神经损伤模型的制作方法。方法8周龄SPF级健康无眼疾SD大鼠12只,按照随机数字表法分为空白组和模型组,每组6只。总剂量30Gy的放射线分3次照射大鼠头部;采用ELISA法测定照射后1d,2、4和8周大鼠血液中内皮素-1(ET-1)和血管性血友病因子(vWF)的质量浓度,并观察视神经显微结构和超微结构的改变。结果空白组与模型组照射前后各时间点ET-1和vWF质量浓度总体比较差异均有统计学意义(ET-1:F分组=32.160,P=0.012;F时间=21.180,P=0.023.vWF:F分组=73.110,P=0.001;F时间=46.180,P=0.002);其中空白组大鼠各时间点血液中ET-1和vWF的质量浓度无明显变化,模型组大鼠血液中ET-1和vWF的质量浓度随照射后时间的延长逐渐升高,并于照射后4周达高峰。照射后8周模型组大鼠神经纤维柬肿胀,排列紊乱,神经纤维间明显空泡化;轴突肿胀,髓鞘板层分离轴突增加,轴索萎缩。空白组和模型组轴索的脱髓鞘率分别为(1.35±0.79)%和(14.44±2.32)%,2个组比较差异有统计学意义(t=14.07,P〈0.01)。结论总剂量30Gy的放射线照射大鼠头部能制作稳定的放射性视神经损伤模型,该方法操作简单,廉价实用,值得进一步研究。Background Radiation-induced optic neuropathy (RION) is a severe complication after radiotherapy for head and neck cancer,which threatens the visual acuity and quality of life of patients. Till now,there is no recognized treatment for RION. It is of great significance to study the natural progression of the RION, and to prevent and treat RION. Objective This study was to establish an ideal radioactive optic nerve injury animal model. Methods Healthy 8-week SD rats with hygiene grade were randomly divided into normal control group and model group, with 6 rats in each group. The total 30 Gy dose of radiation with 3 portions was used to irradiate the head model group rats;ELISA was performed to analysis the changes of endothelin-1 (ET-1) and Von Willebrand factor (vWF) concentrations in blood 2,4 and 8 weeks after irradiation. Hematoxylin-eosin staining and transmission electron microscope were performed to observe the changes of optic structure. The use and care of the experimental animals complied with the ARVO statement. Results The concentrations of ET-I in the model group were (23.18± 0. 1l ), (27.98±0.22), (33.90±0.11), (65.25±0. 38) and (43.82±0.09) pg/ml before irradiation, 1 day,2,4,6 weeks after irradiation,those in the normal control group were (22.65±0. 14) , (23. 18±0. 19) , (23.68±0. 15) , (24.23±0. 12) and (23.58 ±0. 16) pg/ml. The concentrations of vWF in the model group were ( 63.16 ±2.21 ) , (88.32 ± 2.06 ) , ( 123.38 ± 1.36 ) , ( 191.40 ±0.61 ) and ( 141.69 ± 0. 82 ) pg/ml before irradiation, 1 day, 2,4,6 weeks after irradiation,those in the normal control group were ( 62.82 ± 1.56 ), ( 63.35 ± 2.06 ), ( 64. 12 ± 1.76 ), (63.52±2.02) and (63.48 ± 1.55 ) pg/ml. There were significant differences of ET-1 and vWF concentrations among different groups and time points ( ET-1 : Fgroup = 32. 160, P = 0. 012 ;Ftime= 21. 180, P = 0. 023. vWF : Fgroup = 73. 110, P=0. 001 ;Ftime = 46. 180, P

关 键 词:视神经病变/病因学 内皮素-1 血管性血友病因子 脱髓鞘 

分 类 号:R774.6[医药卫生—眼科] R739.91[医药卫生—临床医学] R-332

 

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