Histological Toxicity Comparison of unloaded Ace-DEX and Ace-DEX/10DXR Scaffolds. Coronal sections of mice euthanized 14 days after scaffold implantation with Left) Unloaded acetalated dextran (Ace-DEX) scaffold (total scaffold mass of 2.2 mg) and Right) 10% w/w Ace-DEX/10DXR scaffold (total scaffold mass of 2.2 mg) with total amount of doxorubicin (DXR) equal to 200 μg. Images show sections stained with hematoxylin and eosin (H&E), glial fibrillary acidic protein (GFAP, indicating glial reaction), CD45, (immune cell infiltrates), and F4/80 (macrophages). Scale bars are the equivalent for all images at the same magnification. Black boxes indicate location of magnified region of interest presented in subsequent column.