Fig. 2

Preparation and characteristics of the miR@TDNs. a Schematic diagram of miR@TDN fabrication. b Verification of the successful synthesis of miR@TDNs using 8% PAGE. c Obtained TEM images of the molecular structure of miR@TDNs, the red arrow in the figure indicates the typical tetrahedral shape of miR@TDN. d Average zeta potentials and average sizes of the TDNs and miR@TDNs detected by DLS (\(\hbox {n}=3\)). e Structure stability of miR@TDN (left: Serum stability of miR@TDNs within 24 h in 10% FBS; Middle: Storage stability of miR@TDN at \(4^{\circ }\hbox {C}\); Right: Stability of miR@TDNs in different concentrations of FBS). f The uptake of miR@TDN by DPSC after 30 mins and 60mins by Flow cytometer analysis, and quantitative statistics of cellular uptake from flow cytometer detection (\(\hbox {n}=3\)). Data include the mean ± SD, statistical analysis: \(***p<0.001\)