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2018人参皂苷Rg1对大鼠视神经损伤的保护作用研究

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发表于 2018-8-15 18:32:36 | 显示全部楼层 |阅读模式
  [摘要] 目的 ?^察人参皂苷Rg1对大鼠视神经损伤的保护作用,并探讨其保护机制。 方法 将Wistar大鼠随机分为对照组、模型组和治疗组,每组30只。对照组大鼠不建模腹腔注射生理盐水,模型组大鼠腹腔注射生理盐水,治疗组大鼠建模后腹腔注射人参皂苷Rg1(50 mg/kg),连续给药7 d。采用视神经夹挫伤法建立视神经损伤大鼠模型,建模5 d后所有大鼠右侧上丘注射荧光金标记视网膜神经节细胞(RGCs),处死前行闪光视觉诱发电位检测,处死后比较眼球RGCs密度、RGCs凋亡情况、诱发电位P1波、视神经胆固醇含量、沉默信息调节因子1(SIRT1)蛋白和羟甲基戊二酰辅酶A还原酶(HMGCR)表达情况。 结果 在大鼠处死后7、14、21 d,随着处死时间的延长,对照组视觉诱发电位、视网膜凋亡细胞数没有显著性变化,模型组、治疗组视觉诱发电位、视网膜凋亡细胞数逐渐升高,差异有统计学意义(P  http://
  [关键词] 视神经损伤;大鼠;人参皂苷Rg1;视网膜神经节细胞
  [中图分类号] R737.31 [文献标识码] A [文章编号] 1673-7210(2018)01(c)-0017-05
  [Abstract] Objective To observe the protective effect of ginsenoside Rg1 on optic nerve injury in rats and its protective mechanism. Methods Wistar rats were randomly divided into control group, model group and treatment group, with 30 rats in each group. Rats in the control group were injected intraperitoneally with saline without modeling. Rats in the model group were intraperitoneally injected with saline. Rats in the treatment group were intraperitoneally injected with ginsenoside Rg1 (50 mg/kg) for 7 d. The model of optic nerve injury was established by occlusion of the optic nerve. After 5 days of modeling, fluorescein-labeled retinal ganglion cells (RGCs) were injected into the right superior colliculus on the right side of the rats. Flash visual evoked potentials were detected before the rats were sacrificed. RGCs density, apoptosis of RGCs, P1 wave of evoked potential, optic nerve cholesterol content, silent information regulator 1 (SIRT1) protein and HMG-CoA reductase (HMGCR) expression were detected after the rats were sacrificed. Results At 7, 14, 21 days after sacrifice, the visual evoked potentials and the number of retinal apoptotic cells in the control group did not change significantly with the prolongation of sacrifice time. The visual evoked potentials and the number of retinal apoptotic cells in the model group and treatment group were increased gradually (P     2.2 各组大鼠存活RCGs密度比较
  随着处死时间的延长,对照组RGCs密度没有显著性变化(P > 0.05),模型组、治疗组RGCs密度逐渐下降,差异有统计学意义(P  0.05),模型组、治疗组视神经胆固醇、SIRT1和HMGCR蛋白水平逐渐下降,差异有统计学意义(P  0.05),模型组、治疗组视网膜凋亡细胞数逐渐升高,差异有统计学意义(P 参考文献]
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  (收稿日期:2017-09-13 本文编辑:张瑜杰)
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