Co-delivery of doxorubicin and PEGylated C16-ceramide by nanoliposomes for enhanced therapy against multidrug resistance
Abstract
Aim: To develop novel nanoliposomes (Lip-ADR-Cer) codelivering doxorubicin (ADR) and PEGylated C16 ceramide (PEG-ceramide C16) to overcome multidrug resistance. Materials & methods: The antitumor activity and mechanism of Lip-ADR-Cer were evaluated. Results & conclusion: The IC50 of Lip-ADR-Cer after 48-h treatment with the MCF-7/ADR and HL-60/ADR cancer cells, both being ADR resistant, was 2.2- and 1.4-fold effective respectively versus the general nanoliposomes with no PEG-ceramide C16 (Lip-ADR). The antitumor assay in mice bearing MCF-7/ADR or HL-60/ADR xenograft tumors confirmed the superior antitumor activity of Lip-ADR-Cer over Lip-ADR. We found that the improved therapeutic effect of Lip-ADR-Cer may be attributed to both of the cytotoxic effect of PEG-ceramide C16 and glucosylceramide synthase overexpression in multidrug resistance cells.
Papers of special note have been highlighted as: • of interest; •• of considerable interest
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