Mild microwave activated, chemo-thermal combinational tumor therapy based on a targeted, thermal-sensitive and magnetic micelle.
Biomaterials
; 131: 36-46, 2017 07.
Article
em En
| MEDLINE
| ID: mdl-28376364
ABSTRACT
The development of combinational anti-tumor therapy is of great value. Here, the thermal-sensitive and hepatic tumor cell targeting peptide-A54 modified polymer, A54-poly(ethylene glycol)-g-poly(acrylamide-co-acrylonitrile) (A54-PEG-g-p(AAm-co-AN)) can self-assemble into an 80 nm-sized micelle, which shows a thermal-sensitive behavior with an upper critical solution temperature (UCST) of 43 °C. This self-assembled and targeted A54-PEG-g-p(AAm-co-AN) micelle can co-encapsulate anti-tumor drug doxorubicin (DOX) and magnetic nanoparticles (MNPs) taking advantage of the hydrophobic core of the core-shell micellar structure, when the temperature is lower than 43 °C. A much higher accumulation of the MNPs@A54-PEG-g-p(AAm-co-AN) to the tumor navigated by the A54 targeting peptide is achieved. Due to the thermal-agent effect of the accumulated MNPs in tumor, the mild microwave (8 W) applied afterwards specifically elevates the local tumor temperature by 13 °C, compared to 6 °C without MNPs accumulation in 30 min. The greater temperature rise resulted from the thermal-agent effect of MNPs doesn't only activate the drug release inside tumor cells, but also achieve an augmented hyperthermia. A mild microwave activated, chemo-thermal combinational tumor therapy is thus developed.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Doxorrubicina
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Preparações de Ação Retardada
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Nanopartículas de Magnetita
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Neoplasias Hepáticas
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Micelas
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Antibióticos Antineoplásicos
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
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Female
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Humans
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article