Table 3.

Example of some ligands used in active drug targeting adapted from [95].

Targeting Ligands	Targets	References
Aptamers	Antibodies, cell surface receptors, enzymes, small organic molecules, peptides, proteins	[96,97]
Folate	Folate receptor	[98]
Gelatinase inhibitor peptide CTTHWGFTLC	Matrix Metalloprotease-2 and Matrix Metalloprotease-9 gelatinase	[99]
Luteinizing hormone-releasing hormone	Luteinizing hormone-releasing hormone receptor	[100,101]
RGD peptide	Integrin	[102]