Simulation of Stimuli-Responsive and Stoichiometrically Controlled Release Rate of Doxorubicin from Liposomes in Tumor Interstitial Fluid.
Pharm Res
; 35(5): 103, 2018 Mar 19.
Article
em En
| MEDLINE
| ID: mdl-29557075
ABSTRACT
PURPOSE:
To simulate the stimuli-responsive and stoichiometrically controlled doxorubicin (DOX) release from liposomes in in vivo tumor interstitial fluid (TIF), the effect of ammonia concentration and pH on the DOX release from liposomes in human plasma at 37°C was quantitatively evaluated in vitro and the release rate was calculated as a function of ammonia concentration and pH.METHODS:
Human plasma samples spiked with DOX-loaded PEGylated liposomes (PLD) or Doxil®, containing ammonia (0.3-50 mM) at different pH values, were incubated at 37°C for 24 h. After incubation, the concentration of encapsulated DOX in the samples was determined by validated solid-phase extraction (SPE)-SPE-high performance liquid chromatography.RESULTS:
Accelerated DOX release (%) from liposomes was observed as the increase of ammonia concentration and pH of the matrix, and the decrease of encapsulated DOX concentration. The release rate was expressed as a function of the ammonia concentration and pH by using Henderson-Hasselbalch equation.CONCLUSIONS:
The DOX release from PLD in TIF was expressed as a function ammonia concentration and pH at various DOX concentrations. Further, it was found that the DOX release from liposomes in a simulated TIF was more than 15 times higher than in normal plasma.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doxorrubicina
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Líquido Extracelular
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Antibióticos Antineoplásicos
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Modelos Biológicos
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Neoplasias
Idioma:
En
Revista:
Pharm Res
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Japão