Fig. 7From: HIF-1α overexpression in mesenchymal stem cell-derived exosomes mediates cardioprotection in myocardial infarction by enhanced angiogenesisNeovessel formation in the infarcted border zone was detected by immunofluorescence staining. a Capillaries were visualized as tubular structure perfused by lectin. Bar: 100 μm. b Numbers of capillaries in each high-power field were manually counted (n = 3). **P < 0.01, ***P < 0.001Back to article page