目的:研究naringenin滴眼对碘酸钠诱导的大鼠视网膜色素上皮(retinal pigment epithelium,RPE)变性以及对激光诱导的脉络膜新生血管(choroidal neovascularization,CNV)的作用。方法:10g/Lnaringenin滴眼液预先处理1wk(3次/d),1wk后予35mg/kg碘酸钠舌下静脉注射诱导大鼠RPE变性,在2wk和4wk末,视网膜电图(electroretinogram,ERG)测量C波。另预处理1wk(3次/d),在2wk和4wk末用荧光素血管造影(fluorescein angiography,FA)和荧光显微镜测量CNV面积。结果:碘酸钠注射后2wk,碘酸钠组ERG的C波下降至对照组的53%(P<0.01)。而naringenin+碘酸钠组则无明显变化。4wk后,碘酸钠组下降至对照组的37%(P<0.01),而naringenin+碘酸钠组下降至对照组的57%(P<0.01)。与碘酸钠组比较,naringenin+碘酸钠组控制了66%的C波下降(P<0.05)。35mg/kgnaringenin组FA测量的CNV面积2,4wk末分别是对照组的53%和49%(P<0.01)。4wk后naringenin组荧光显微镜测量的CNV面积是对照组的47%(P<0.01)。结论:10g/Lnaringenin可以显著保护碘酸钠诱导的RPE变性,也能减小CNV的形成。

AIM:To study the effects of naringenin eye drops on NaIO3-induced retinal pigment epithelium (RPE) degeneration and laser-induced choroidal neovascularization (CNV) in rat eyes.METHODS:The 35mg/kg NaIO3-induced RPE degeneration was prevented by 10g/L naringenin eye drops 3 times a day for 7 days in advance of NaIO3 injection,and then 2 to 4 weeks thereafter,RPE function was measured with C-wave of electroretinogram (ERG). The laser-induced CNV rats were treated with laser to break the Bruch’s membrane and the CNV formation was prevented by 10g/L naringenin eye drops instilled 3 times a day for 2 to 4 weeks. The CNV formation was measured with fluorescein angiography (FA) and flat mount. RESULTS:Two weeks after NaIO3 injection,the amplitude of ERG C-wave fell markedly in NaIO3 group to 53% of normal group (P<0.01). No apparent difference was observed in naringenin+ NaIO3 group. Four weeks later,the NaIO3 group fell to 37% of normal group (P<0.01),while the naringenin+ NaIO3 group fell to only 57% of normal group (P<0.01). There is a 52% reversal of the ERG C-wave by naringenin as compared to NaIO3 treated group (P<0.05). Two weeks and four weeks after laser treatment,naringenin reduced the CNV formation to 53% and 49% of control group (100%) measured by FA (P<0.01). Four weeks after laser treatment,naringenin reduced the CNV formation by 47% as compared to control group measured with flat mount (P<0.01).CONCLUSION:Naringenin significantly protected RPE from NaIO3 induced degeneration and can also prevent CNV formation.