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. Author manuscript; available in PMC: 2008 Nov 25.
Published in final edited form as: Neuroscience. 2008 Mar 26;153(4):963–974. doi: 10.1016/j.neuroscience.2008.03.042

Fig. 3.

Fig. 3

NO production as measured by DAF-2 DA fluorescence in cortical neurons exposed to 300 µM KCN and varying numbers of LED treatment for 24 h. DAF-2DA expression was increased by KCN exposure, but the fluorescent signals were significantly lower in cells treated with LED for two and three times than those of others. A: Control, B: KCN alone, C–F: One, two, three and four times of LED treatment, respectively. Scale bar = 30 µm for all. G: Quantitative analyses of NO expression. Two and three times of LED treatment resulted in a significant reduction of DAF-2 DA fluorescence as compared to once or 4 times a day of LED treatment, both of which were not effective. ***, P < 0.001 compared to controls; ++, P < 0.01 compared to KCN alone.