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Drug release and MTT assay. (A) The in vitro release profiles of Dox-HepM-PLGA and Dox-PLGA at pH 7.4 and 6.8. (B) MTT assay results. The concentration of Dox was 5 μg/mL, a-e refer to Dox-HepM-PLGA, Dox-L02M-PLGA, Dox-PLGA, free Dox, and PBS, respectively.
