Objective To evaluate the protective effect of bone marrow stromal cells (BMSCs) transferred by AD·ANG ex vivo on ischemic myocardium. Methods ELISA method was used to assay the expression and secretion of angiogenin (ANG) after Ad·ANG transfection of BMSCs ex vivo. Then BMSCs with Ad · ANG were transplanted into ischemic myocardium of isogenic Lewis rats. 4 weeks later, the parameters of hear function, such as EF and EDLV, were examined by echocardiography. Surival and differentiation of transplanted BMSCs and angiogenesis were appraised by histology and transmission electron electron micrography. Results ANG was found in both lysate and culture medium after transfection of BMSCs. A maximum expression of ANG was observed at 4-7 days after transfection and could still be assayed 15 days later. 4 weeks later after transplantation in the BMSCs with Ad· NAG, heart function improved better than the single BMSCs group (P0.05), Ad·ANG group (P0.01)and blank control group (P0.01). Angiogenesis in
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