scholarly journals DESTRUCTION OF POLYOXOMETALATE {MOFE} AS A TRANSPORT AGENT IN BLOOD SIMULATING MEDIA, ITS STABILIZATION BY ALBUMIN

Author(s):  
Маргарита Олеговна Тонкушина ◽  
Илья Дмитриевич Гагарин ◽  
Ольга Владимировна Русских ◽  
Ксения Александровна Белозерова ◽  
Александр Александрович Остроушко

Создание и использование средств адресной доставки лекарств на основе нанокластерного полиоксометаллата {MoFe} подразумевает его деструкцию в организме, сопровождающуюся постепенным высвобождением лекарства. Были определены константы скорости процесса деструкции чистого {MoFe} и в составе ассоциата с сывороточным альбумином в растворах моделирующих среду крови (фосфатный буфер с pH 7,4 и сыворотка крови крупного рогатого скота). Показана стабилизация полиоксометаллата альбумином в модельных средах. Определено соотношение компонентов в ассоциате {MoFe} -альбумин, оно составило 1,6 ионов полиоксометаллата на молекулу альбумина. The creation and use of the targeted drug delivery systems based on nanocluster polyoxometalate {MoFe} implies its destruction in the body, accompanied by the gradual release of the drug. The rate constants of the destruction of pure {MoFe} and its associate with serum albumin in solutions simulating the blood media (phosphate buffer with pH 7,4 and blood serum of cattle) were determined. The stabilization of polyoxometalate by albumin in model solutions was shown. The ratio of components in the associate {MoFe} -albumin was determined, it was 1,6 polyoxometalate ions per albumin molecule.

2016 ◽  
Vol 17 (1-2) ◽  
Author(s):  
Julia Modrejewski ◽  
Johanna-Gabriela Walter ◽  
Imme Kretschmer ◽  
Evren Kemal ◽  
Mark Green ◽  
...  

AbstractThe purpose of this study was to develop a model system for targeted drug delivery. This system should enable targeted drug release at a certain tissue in the body. In conventional drug delivery systems, drugs are often delivered unspecifically resulting in unwarranted adverse effects. To circumvent this problem, there is an increasing demand for the development of intelligent drug delivery systems allowing a tissue-specific mode of delivery. Within this study, nanoparticles consisting of two biocompatible polymers are used. Because of their small size, nanoparticles are well-suited for effective drug delivery. The small size affects their movement through cell and tissue barriers. Their cellular uptake is easier when compared to larger drug delivery systems. Paclitaxel was encapsulated into the nanoparticles as a model drug, and to achieve specific targeting an aptamer directed against lung cancer cells was coupled to the nanoparticles surface. Nanoparticles were characterized by dynamic light scattering (DLS), transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FTIR), and nanotracking analysis (NTA). Also their surface charge was characterized from ζ-potential measurements. Their preparation was optimized and subsequently specificity of drug-loaded and aptamer-functionalized nanoparticles was investigated using lung cancer cells.


Drug Delivery ◽  
2017 ◽  
Vol 24 (1) ◽  
pp. 707-719 ◽  
Author(s):  
Jiajiang Xie ◽  
Yanxiu Li ◽  
Liang Song ◽  
Zhou Pan ◽  
Shefang Ye ◽  
...  

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