Effects of ZX-5 and its optical isomers on ocular blood flow in rabbits and retinal function recovery in rats
- VernacularTitle:ZX-5及其光学异构体对兔眼血流和大鼠视网膜功能恢复的影响
- Author:
Jie, PENG
;
Yan-Hong, ZOU
;
Wei, JIANG
;
Yi-Hua, ZHANG
;
Xiao-Bin, JI
;
Zi-Long, SHEN
;
Si-Xun, PENG
;
George C Y CHIOU
- Publication Type:Journal Article
- Keywords:
ZX-5;
(R,R)-ZX-5;
(S,S)-ZX-5;
choroid;
retina
- From:
International Eye Science
2007;7(5):1197-1201
- CountryChina
- Language:Chinese
-
Abstract:
AIM: The effects of ZX-5, as nitric oxide (NO) donor, on ocular blood flow has been investigated using colored microsphere technique in previous study. The relationship between the production of NO by ZX-5 and ocular blood flow has been evaluated. ZX-5 has been shown to have strong positive effect on increasing choroidal blood flow. However,the effect of ZX-5 on retinal function recovery, the effects of its optical isomers, (R, R)-ZX-5 and (S, S)-ZX-5, on choroidal blood flow and retinal function recovery have not been studied and merit investigation.METHODS: Colored microsphere technique was used for in vivo experiments to determine choroidal blood flow of ocular hypertension (40mmHg) in rabbit eyes. Electroretinography was used to measure the b-wave recovery as an indication of retinal function recovery.RESULTS: (R, R)-ZX-5 increased choroidal blood flow at 10g/L, 50μL instillation into eyes at all time points (P＜0.05).(S, S)-ZX-5 was not effective in increasing choroidal blood flow. ZX-5 and (R, R)-ZX-5 showed significant effects in retinal function recovery after ischemia of the retina at all time points (P＜0.05); whereas (S, S)-ZX-5 did not show significant effect on recovery of b-wave after ischemia at most time points except at 120 and 240 minutes.CONCLUSION: ZX-5 and (R, R)-ZX-5 have high potency in increasing the choroidal blood flow and improving the retinal function recovery. It is hoped that they could be used for the prevention/treatment of ocular blood flow related eye diseases.
