中文摘要
本研究通过建立不同类型不同种鼠的青光眼动物模型,研究腺相关病毒介导不同的神经营养因子在不同类型的鼠青光眼动物模型中转录、表达,以及对RGC的保护作用。研究细胞信号通路对RGC存活的影响。结果表明:采用激光光凝小梁网可建立慢性持续性高眼压以及波动性高眼压大鼠模型,前房持续灌注建立急性高眼压模型。AAV介导的BDNF在慢性高眼压大鼠中对RGC有保护趋势。在实验眼注射AAV介导的BDNF,提示对另一眼的RGC具有保护作用;AAV介导的CNTF、BCL2对高眼压大鼠没有明显的保护作用。AAV介导的GAP43对大鼠RGC有损害作用。AAV介导的BDNF对遗传性青光眼小鼠DBA/2J的RGC具有保护作用,AAV介导的CNTF、BCL2、GAP43对RGC没有保护作用。在高眼压大鼠中,PI3K/akt通路及巨噬细胞参与节细胞存活的调节。本研究结果为腺病毒介导的不同神经营养因子基因治疗在青光眼模型中的有效性提供了参考。表明PI3K/akt信号传导通路以及巨噬细胞参与了RGC存活的调节。
英文摘要
The aims of this study were: conduct various glaucoma models including chronic high intraocular pressure (IOP) rat model , transient high IOP rat model and acute high IOP rat model. And then investigate the effectiveness of AAV mediated BDNF、 CNTF、GAP43 and BCL2 in different glaucoma models. The role of PI3K/akt in the protection of RGC apoptosis in glaucoma model was also studied. The results showed that: Different glaucoma model including chronic and transient high IOP rat models could be induced by using laser focus on the trabecular meshwork,and acute high IOP rat model could be induced by anterior chamber infusion. Compared with the control group, intravitreal injection of AAV-medicted BDNF leaded to more RGCs survival but without statistical significance in chronic glaucoma rat model. On the other hand, intravitreal injection of AAV-BDNF may lead to protective effect on the other eye. AAV mediated BCL2 and AAV mediated CNTF did not show neuroprotective effect in glaucoma rats. And it was interesting that AAV mediated GAP43 leaded to more RGC apoptosis in glaucoma rats. AAV mediated BDNF but not BCL2 or GAP43 showed neuroprotective effect in DBA/2J mice. In normal condition, PI3K/akt did not show significant activity in RGC .But in acute high IOP model,PI3K/akt pathway and macrophages modulated RGC surv
结题摘要
本研究通过建立不同类型不同种鼠的青光眼动物模型,研究腺相关病毒介导不同的神经营养因子在不同类型的鼠青光眼动物模型中转录、表达,以及对RGC的保护作用。研究细胞信号通路对RGC存活的影响。结果表明:采用激光光凝小梁网可建立慢性持续性高眼压以及波动性高眼压大鼠模型,前房持续灌注建立急性高眼压模型。AAV介导的BDNF在慢性高眼压大鼠中对RGC有保护趋势。在实验眼注射AAV介导的BDNF,提示对另一眼的RGC具有保护作用;AAV介导的CNTF、BCL2对高眼压大鼠没有明显的保护作用。AAV介导的GAP43对大鼠RGC有损害作用。AAV介导的BDNF对遗传性青光眼小鼠DBA/2J的RGC具有保护作用,AAV介导的CNTF、BCL2、GAP43对RGC没有保护作用。在高眼压大鼠中,PI3K/akt通路及巨噬细胞参与节细胞存活的调节。本研究结果为腺病毒介导的不同神经营养因子基因治疗在青光眼模型中的有效性提供了参考。表明PI3K/akt信号传导通路以及巨噬细胞参与了RGC存活的调节。
