Figure 3.

Mean signal intensity ratios of multipotent progenitor cell populations after intracoronary injection in infarcted hearts. (A) Change in mean signal intensities by cell population: when compared with hearts injected with MSCs, in vivo tracking of those injected with labelled-BMMNCs and PBMNCs found to less emitted NIR fluorescence, corresponding to mean SIR less than one; (B) Signal intensity ratios according to cardiac zones: MPCs were compared according to infarcted cardiac zones, with significant differences in mean SIRs documented between cell groups. Using the non-injected, uninjured zone (base of the heart) as a reference, only MSCs exhibited SIRs greater than one in injected zones (mid-segment and apex).