基因重组碱性成纤维细胞生长因子对大鼠视网膜神经节细胞的影响

目的:研究基因重组碱性成纤维细胞生长因子(rbFGF)对大鼠视网膜神经节细胞(RGCs)的影响。方法:大鼠在视神经部分损伤后,球后注射生理盐水、维生素B₁₂、rbFGF,伤后4周进行轴突定量、视网膜神经节细胞定量以及RGCs凋亡的检测,观察视神经损伤修复情况。结果:伤后4周时,生理盐水和维生素B₁₂对RGCs无挽救作用,800U、1600U和2400U的rbFGF对RGCs挽救率分别为24.5%、27.3%、28.5%,800UrbFGF组、1600UrbFGF组和2400UrbFGF组未发生溃变的轴突数分别是损伤未治疗组的2.03、2.43、2.31倍。流式细胞仪检测结果显示:rbFGF治疗7d后,RGCs凋亡率显著减少。结论:rbFGF可提高视网膜神经节细胞的存活率,减少轴突溃变,有抗凋亡作用,对视神经损伤有显著的促功能修复作用。

Effects of recombinant basic fibroblast growth factor on retinal ganglion cells of rats

AIM: To investigate the pharmacological effects of recombined basic fibroblast growth factor (rbFGF) on retinal ganglion cells (RGCs) of rats. METHODS: Using calibrated cross-action forceps a moderate crush injury was inflicted on the nerve. After crush injury, rbFGF, saline and VB 12 were administered by retrobublar injection. Four weeks after injury , the apoptosis of RGCs was measured with flow cytometer. RESULTS: Four weeks after operation, it was shown that the rbFGF, but not saline or VB 12 injection could significantly improve the maintainance of RGCs of rats. After 800 U, 1600 U and 2400 U rbFGF injection, the injured RGCs were rescued by 24.5%, 27.3% and 28.5% respectively. Furthermore, it was also found that rbFGF injection could effectively prevent the axons from injury. The flow cytometer showed that the rate of apoptosis was reduced markedly on 7 days at rbFGF group. CONCLUSION: rbFGF can significantly promote the functional repair of injured optic nerve. [