Fig. 4

In vivo biodistribution of PUA NPs. A Fluorescence images of AKI and normal mice following the injection of DiR-NPs and free DiR at different time points. B Fluorescence images of the kidney tissues dissected from AKI and normal mice at 48 h. C Quantitative analysis of fluorescence intensity of kidney tissues at 48 h. D Fluorescence images of the major organs dissected from AKI and normal mice at 48 h. E Quantitative analysis of fluorescence intensity in major organs at 48 h