Figure 6: Effect of oral sodium bicarbonate administration on MMP activity-related fluorescence in mouse xenografts. Tumor bearing mice ( ) were imaged prior to treatment and then received 42 mg of sodium bicarbonate or PBS (p.o.). (a) Subsequent images were taken at 30 minutes, 1, 2, 3, 4, and 5 hours. Fluorescence-based activity is expressed as a percentage of signals taken prior to treatment. The reduction in fluorescence-based activity was statistically significant in sodium bicarbonate-treated mice after the 30-minute time point (* ). (b) Representative image of experiment comparing PBS-treated mouse to bicarbonate-treated mouse.