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Representative images of hematoxylin and eosin-stained tissue sections from tumor-bearing mice treated with normal saline, oridonin (ORI) solution, ORI-loaded atactic poly(D,L-lactic acid) nanoparticles (ORI-PLA-NPs), or ORI-PLA-NPs further modified by surface cross-linking with the peptide Arg-Gly-Asp (ORI-PLA-RGD-NPs) (magnification 40×).
