Smart Design of a pH-Responsive System Based on pHLIP-Modified Magnetite Nanoparticles for Tumor MRI; ACS Applied Materials and Interfaces; Vol. 13, iss. 31

Podrobná bibliografie
Parent link:	ACS Applied Materials and Interfaces Vol. 13, iss. 31.— 2021.— P. 36800–36815
Další autoři:	Demin A. M. Aleksandr Mikhaylovich, Pershina A. G. Aleksandra Gennadievna, Minin A. S. Artem Sergeevich, Brikunova O. Ya. Olga Yaroslavovna, Murzakhaev A. M. Aydar Marksovich, Perekucha N. A. Nataljya Andreevna, Romashchenko A. V. Aleksandr Viktorovich, Shevelev O. B. Oleg Borisovich, Uymin M. A. Mikhail Aleksandrovich, Byzov I. V. Iljya Vladimrovich, Malkeeva D. Dina, Kiseleva E. V. Elena Vladimirovna, Efimova E. V. Elena Viktorovna, Vtorushin S. V. Sergey Vladimirovich, Ogorodova L. M. Lyudmila Mikhaylovna
Shrnutí:	Title screen Magnetic Fe3O4 nanoparticles (MNPs) are often used to design agents enhancing contrast in magnetic resonance imaging (MRI) that can be considered as one of the efficient methods for cancer diagnostics. At present, increasing the specificity of the MRI contrast agent accumulation in tumor tissues remains an open question and attracts the attention of a wide range of researchers. One of the modern methods for enhancing the efficiency of contrast agents is the use of molecules for tumor acidic microenvironment targeting, for example, pH-low insertion peptide (pHLIP). We designed novel organosilicon MNPs covered with poly(ethylene glycol) (PEG) and covalently modified by pHLIP. To study the specific features of the binding of pHLIP-modified MNPs to cells, we also obtained nanoconjugates with Cy5 fluorescent dye embedded in the SiO2 shell. The nanoconjugates obtained were characterized by transmission electron microscopy (TEM), attenuated total reflection (ATR), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), dynamic light scattering (DLS), UV and fluorescence spectrometry, thermogravimetric analysis (TGA), CHN elemental analyses, and vibrating sample magnetometry. Low cytotoxicity and high specificity of cellular uptake of pHLIP-modified MNPs at pH 6.4 versus 7.4 (up to 23-fold) were demonstrated in vitro. The dynamics of the nanoconjugate accumulation in the 4T1 breast cancer orthotopically grown in BALB/c mice and MDA-MB231 xenografts was evaluated in MRI experiments. Biodistribution and biocompatibility studies of the obtained nanoconjugate showed no pathological change in organs and in the blood biochemical parameters of mice after MNP administration. A high accumulation rate of pHLIP-modified MNPs in tumor compared with PEGylated MNPs after their intravenous administration was demonstrated. Thus, we propose a promising approach to design an MRI agent with the tumor acidic microenvironment targeting ability. Текстовый файл AM_Agreement
Jazyk:	angličtina
Vydáno:	2021
Témata:	электронный ресурс труды учёных ТПУ magnetic nanoparticles Fe3O4 pHLIP tumor pH-triggered delivery MRI магнитные наночастицы опухоли
On-line přístup:	https://doi.org/10.1021/acsami.1c07748
Médium:	Elektronický zdroj Kapitola
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=667891