Fig. 3

Biodistribution of TP@HSA NPs and TP@HSA NPs-Gel administrated in ST36 and non-acupoint. a Imaging of AIA mice treated with different preparations at different point-in-times (the fluorescence scale bar of hind paw in each side corresponds to the white arrow). b Imaging of organs in different groups. c Quantitative analysis of fluorescence in different organs at different time. d Pharmacokinetics of TP in different groups (the insert is local magnification of 0–4 h). e AUC of TP in different groups. T0: ST36 TP solution; T1: non-acupoint TP@HSA NPs; T2: ST36 TP@HSA NPs; T3: ST36 TP@HSA NPs-Gel