Fig. 6From: Engineered exosomes for targeted co-delivery of miR-21 inhibitor and chemotherapeutics to reverse drug resistance in colon cancerThe systematic toxicity assessment of THLG-EXO. Histopathological analysis of heart, lung, liver, kidney and spleen sections stained with hematoxylin and eosin of BALB/c mice post-intravenous injection of 20 mg/kg THLG-EXO or PBS for 7 days (one dose every other day). Images were obtained under Nikon Ti microscope using a  × 40 objectiveBack to article page