In our previous study, we demonstrated that
folate-appended methyl‑β‑cyclodextrin (FA-M-β-CyD) was a promising
antitumor agent for the treatment of
folate receptor-α (FR-α)-expressing
tumors. In the present study, to enhance the antitumor effect of FA-M-β-CyD against FR-α- and CD44-expressing
colorectal cancer cells, we synthesized a dual targeting supramolecular complex composed of FA-M-β-CyD and
adamantane-grafted
hyaluronic acid (Ad-HA). The supramolecular complex of Ad-HA/FA-M-β-CyD showed higher cytotoxic activity in HCT116 cells (FR-α (+), CD44 (+)), a human
colon cancer cell line, than FA-M-β-CyD alone. In addition, the cytotoxic activity of Ad-HA/FA-M-β-CyD was significantly impaired by the addition of FA and HA, as inhibitors of FR-α and CD44, respectively. Furthermore,
tetramethylrhodamine isothiocyanate (
TRITC)-labeled FA-M-β-CyD was efficiently internalized into HCT116 cells through supramolecular complexation with Ad-HA, compared to that of
TRITC-FA-M-β-CyD alone. Additionally, Ad-HA/FA-M-β-CyD induced mitophagy in HCT116 cells. These results suggest that Ad-HA/FA-M-β-CyD targeted HCT116 cells, as well as induced mitophagy-mediated cell death. Notably, an
intravenous injection of the Ad-HA/FA-M-β-CyD complex in a mouse model of
colorectal cancer significantly ameliorated the growth of
tumor polyps. Collectively, these results suggest that Ad-HA/FA-M-β-CyD has antiproliferation effects in
tumors, based on the dual targeting activity.