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In vitro antiproliferative activity of blank lipid nanoparticle (P), DiP, and P2P. (A) The cytotoxicity of different concentrations of P (a), DiP (b), and P2P (c) against A549 cells for 24, 48 and 72 h. (B) The cytotoxicity of different concentrations of P (a), DiP (b), and P2P (c) against PC9 cells for 24, 48 and 72 h. **p < 0.01 and ***p < 0.001 compared with 24 h or 48 h treatment group by Student’s t-test.
