Figure 3

EGFP protein expression in injection regions of the myocardium for four different treatment groups, as evaluated using confocal laser scanning microscopy. (Scale bar = 50 μm). (a) Expression of EGFP in the myocardium of the EGFP+MB/US group (original magnification ×400). (b) Expression of EGFP in the myocardium of the EGFP+US group (original magnification ×400). (c) Expression of EGFP in the myocardium of the EGFP group (original magnification ×400). (d) ( ± sd, n = 4). *P < 0.01 vs. the other three groups; **P < 0.01 vs. the EGFP group and the EGFP+MB group; # P > 0.05 vs. the EGFP group.