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RT-PCR of angiopoietin-1 (Ang-1) mRNA expression in each group. No expression was observed in the control group, while gene expression was detected in the other 3 groups. Lanes 1-4, β-actin; lane 5, control; lane 6, non-targeted microbubble delivery (TMB) group; lane 7, TMB group; lane 8, intramyocardial injection (IMI) group.
