Effects of C-nitropyrazoles and C-nitroazoles on ocular blood flow and retinal function recovery after ischemic insult.

Effects of C-nitropyrazoles and C-nitroazoles on ocular blood flow and retinal function recovery after ischemia have been studied. The compounds were tested on ocular blood flow of ocular hypertensive (40 mmHg) rabbit eyes with colored microsphere technique. They were also tested on the retinal function recovery after ischemia of rat eyes with electroretinography. All compounds (DC-1 through DC-17) showed significant increase in retinal function recovery after ischemia in the range of 26 % to 120 % (P<0.05). Among five compounds (DC-1 through DC-5) studied, four compounds (DC-2 through DC-5) increased the blood flow in choroid, iris, and ciliary body, but not in retina. DC-1 did not show significant increase of blood flow in any of these ocular tissues. C-Nitropyrazoles can facilitate significant retinal function recovery after ischemic insult through the increase of ocular blood flow. Since rabbit's retina is scarce in vasculature, it did not show significant change in blood flow by C-nitropyrazoles as expected. Among all 17 compounds, DC-5 seems to be the most potent compound.