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. 2023 Jul 7;5(15):3834–3856. doi: 10.1039/d3na00198a

The targeting strategies: post-modification of CDNs.

Chemical/physical strategy Target organ/cells Ligand Disease Reference
Succinimidyl-[(N-maleimidopropionamido)-polyethyleneglycol] ester (NHS-PEG-maleimide) is used as a hinge that anchors the ligands PC3 cells Recombinant human hyaluronidase, PH20 (rHuPH20) Cancer having a pericellular HA matrix 205
DNA is engineered to be a hinge that anchors the ligands A549 and MCF 7 cells Quantum dots (QDs) Lung cancer and breast cancer 206
Thiol–maleimide is used as a hinge that anchors the ligands HepG2 cells Antibody against a transferrin receptor (TfR) Hepatocellular carcinoma 207
DSPE-PEG-maleimide is used as a hinge that anchors the ligands MCF 7 cells FITC for fluorescent imaging Breast cancer 208
Dibenzocyclooctyne (DBCO)–azide cycloaddition Integrin αvβ3 in reactive cerebral vascular endothelial cells c(RGDyK) peptide Cerebral ischemia 209
Copper-catalyzed azide alkyne cycloaddition 4t1 cells 4t1 exosomal proteins Breast cancer 210
Supplementing the membrane with additional cholesterol, stabilizing the nanostructure and facilitating the retention of a pH gradient 4t1 cells No ligand Breast cancer 203
Phospholipid insertion to anchor the epidermal growth factor receptor (EGFR) binding nanobodies EGFR-overexpressing tumor cells EGFR X 211
Tetrahedral DNA structures that are conjugated with a DNA aptamer are tethered in CDNs using cholesterol anchoring HepG2 cells TLS11a aptamers Hepatocellular carcinoma 212
ChiP in DMSO was mixed with exosomes in PBS, and the mixture was shocked in an ice bath (hydrophobic aggregation was used) A multifunctional chimeric peptide 213
The positive charge from the multifunctional peptide could electrostatically interact with the negative charge of the CDNs HepG2 cells Pullulan Hepatocellular carcinoma 214