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. Author manuscript; available in PMC: 2013 Feb 1.
Published in final edited form as: Biomaterials. 2011 Dec 3;33(6):1838–1850. doi: 10.1016/j.biomaterials.2011.11.020

Table 2. Classification of targeting ligands linked to the Ad/polymers for active targeting to tumor cells.

Ligand type Targeting ligand Polymer linker Ad type Target cell types and comments Antitumoral effect Ref.
Homing peptides linear RGD PEG Ad-ΔE1/Luc CAR (-/+) cells No (114)
Ad-ΔE1/Luc CAR (-/+) cells No (115)
cyclic RGD Ad-ΔE1/IκB Down regulation of E-selectin, ICAM-1, VCAM-1, IL-6, IL-18, VEGF A and Tie-2 No (117)
Ad-ΔE1/GFP-Luc CAR (-/+) cells No (116)
Ad-ΔE1/GFP-Luc In vitro & in vivo bioluminescence imaging No, but tumor imaging (118)
PEG-CBA-DAH Oncolytic Ad (Ad-ΔB7-U6shIL8) CAR (-/+) cells and oncolytic effects No (90)
SIKVAV pHPMA Ad-ΔE1/Luc α6β1 integrins-positive Prostate cancer cells No (119)
SIGYPLP Ad-ΔE1/Luc HUVECs No (120)
CGKRK PEG Ad-ΔE1/HSV-tk antitumor effects against primary tumors and metastases Yes (121)
Growth factors EGF PEG-PCI Ad-ΔE1/β-gal EGFR (-/+) & CAR (-/+) cells No (126)
pHPMA Ad-ΔE1/Luc or Ad-wt EGFR (-/+), A549, A9, A9-EGFR And SKOV-luc tumor (i.p.) Yes, and tumor imaging (127)
PEG-biotin Avidin-modified Ad-ΔE1/GFP EGFR (-/+), A431 (+) and MCF7 (-) No (128)
bFGF or VEGF pHPMA Ad-ΔE1/β-gal, Ad-ΔE1/GFP A9, A9-21, HUVE, A549 No (52)
FGF2 PEG Ad-ΔE1/Luc or Ad-wt FGF (-/+), SKOV3 tumors (i.p.) Yes (133)
Ad-ΔE1/β-gal In vivo transduction (SKVO3, i.p.) No (132)
Antibodies EGFR Cetuximab pHPMA Ad-ΔE1/Luc or Ad-wt EGFR (+) cells but no EGFR phosphorylation Yes (146)
Herceptin PEG Ad-ΔE1/GFP Herceptin (-/+) cells No (141)
Ad-ΔE1/GFP, oncolytic Ad (DWP418) Herceptin (-/+) cells, and tumor models of EGFR (+) SKOV3, MDA-MB435 / EGFR (-) MCF7-mot Yes (142)
E-selectin pHPMA Ad-ΔE1/Luc TNF-α-activated HUVECs No (150)
PEG Ad-ΔE1/GFP-Luc TNF-α-activated HUVECs No (116)
PSMA pHPMA AΔ-ΔE1/Luc PSMA-positive LNCaP No (151)
Natural source Folate PEG Ad-ΔE1/GFP Many cancerous cells No (163)