Self-production of oxygen system CaO2 /MnO2 @PDA-MB for the photodynamic therapy research and switch-control tumor cell imaging.
J Biomed Mater Res B Appl Biomater
; 106(7): 2544-2552, 2018 10.
Article
em En
| MEDLINE
| ID: mdl-29345749
ABSTRACT
Photodynamic therapy (PDT) holds promise in biochemical study and tumor treatment. A novel multifunctional nanosystem CaO2 /MnO2 @polydopamine (PDA)-methylene blue (MB) nanosheet (CMP-MB) was designed. CaO2 nanoparticles were encapsulated by MnO2 nanosheet, and then PDA was coated on the surface of CaO2 /MnO2 nanosheets, which could adsorb photosensitizer MB through hydrophobic interaction or π-π stacking. In this nanosystem, CaO2 /MnO2 had the ability of self-production of oxygen, which solved the problem of tumor hypoxia largely. Moreover, it is worth mentioning that the fluorescence of MB was suppressed by MnO2 , while its emission was triggered in the simulated tumor microenvironment. Therefore, CMP-MB nanosheet could be used to switch-control cell imaging potentially. 3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyltetrazolium bromide testing and Live/Dead assay confirmed CMP-MB nanosheet had fewer side effects without illumination while it destroyed Hela cell with the illumination of light. Vitro cell experiment demonstrated CMP-MB nanosheet could achieve tumor microenvironment responsive imaging and inhibit tumor cell growth under illumination effectively. Therefore, the system has great potential for PDT application and switch-control tumor cell imaging. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B Appl Biomater, 106B 2544-2552, 2018.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Óxidos
/
Fotoquimioterapia
/
Polímeros
/
Compostos de Manganês
/
Compostos de Cálcio
/
Nanoestruturas
/
Indóis
/
Azul de Metileno
/
Neoplasias
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article