Fig. 3. Cytotoxicity of nanoghosts derived from M2 Raw 264.7 macrophages. Viability of (A) hMSCs, (B) NDFs, and (C) NIH-3T3 cells treated with different concentrations of nanoghosts (Cntl = control without any treatment, P Cntl = positive control with 1% triton-x treatment).