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Cytotoxicity and transfection efficiency in vitro. (A) Cytotoxicity of PDAPEI to RAW246.7 cells tested by CCK-8 assay (viability cells %) at different w/w. (B) Transfection efficiency of PDAPEI to RAW246.7 cells measured with flow cytometry (EGFP positive cells %) at different w/w (red: PDAPEI/pDNA, yellow: PEI 25 kDa/pDNA, black: PEI 1.8 kDa/pDNA). The experiments have been repeated for three times. (*p < 0.05, **p < 0.01).
