Folate receptor targeting of radiolabeled liposomes reduces intratumoral liposome accumulation in human KB carcinoma xenografts
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- Folate-receptor-targeting-of-radiolabeled-liposomes-reduces--111718
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Background: Active, ligand-mediated, targeting of functionalized liposomes to folate receptors (FRs) overexpressed on cancer cells could potentially improve drug delivery and specificity. Studies on folate-targeting liposomes (FTLs) have, however, yielded varying results and generally fail to display a clear benefit of FR targeting.
Method: Tumor accumulating potential of FTLs and NTLs were investigated in a FR overexpressing xenograft model by positron emission tomography/computed tomography imaging.
Results: Tumors displayed significantly lower activity of FTLs than NTLs. Furthermore, FTLs displayed worse circulating properties and increased liver-accumulation than NTLs.
Conclusion: This study underlines that long-circulating properties of liposomes must be achieved to take advantage of EPR-dependent tumor accumulation which may be lost by functionalization. FR-functionalization negatively affected both tumor accumulation and circulation properties.
Method: Tumor accumulating potential of FTLs and NTLs were investigated in a FR overexpressing xenograft model by positron emission tomography/computed tomography imaging.
Results: Tumors displayed significantly lower activity of FTLs than NTLs. Furthermore, FTLs displayed worse circulating properties and increased liver-accumulation than NTLs.
Conclusion: This study underlines that long-circulating properties of liposomes must be achieved to take advantage of EPR-dependent tumor accumulation which may be lost by functionalization. FR-functionalization negatively affected both tumor accumulation and circulation properties.
Original language | English |
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Journal | International Journal of Nanomedicine |
Volume | 13 |
Pages (from-to) | 7647-7656 |
ISSN | 1176-9114 |
DOIs | |
Publication status | Published - 2018 |
- liposomes, folate, cancer, imaging, PET, EPR
Research areas
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