Figure 1
From: A choline derivate-modified nanoprobe for glioma diagnosis using MRI

Synthetic route for the nanoprobes and their targeting strategies.
(a) DGL and CD were linked using MAL-PEG3.5K-NHS. Paramagnetic Gd3+ ions were conjugated to DP or DPC using p-SCN-Bn-DTPA. (b) The DP-DTPA-Gd nanoprobe accumulated in glioma via the EPR effect, whereas the DPC-DTPA-Gd nanoprobes could also enter the glioma via choline transporters, which are on brain capillary endothelial cells and glioma cells.