Fig. 4
Cellular uptake of PINPs@PM post irradiation. a Flow cytometry of 4T1 cells treated with PINPs@PM for 12 h in the presence and absence of irradiation pretreatment. The fluorescence intensity is presented as the mean ± SD. **, P < 0.01. b Cell cycle distribution of 4T1 cells treated with 4-Gy X-ray irradiation. The proportions of each phase are presented as the mean ± SD. c Immunoblotting revealed the alterations of Caveolin-1 in 4T1 cells after irradiation. β-actin was employed as the reference