Вивчення структури наноалмазів і їх впливу на мікров'язкість мембран еритроцитів щурів методом спінових зондів

• Date: 2019
• Main Authors: Kartel, N. T., Ivanov, L. V., Lyapunov, A. N., Nardid, O. A., Scherbak, O. V., Gurova, O. A., Ototrub, A. V.
• Format: Article
• Language: Russian
• Published: Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine 2019
• Subjects: спіновий зонд; детонаційні наноалмази; електронний парамагнітний резонанс; парамагнітні центри; вільнорадикальні процеси; мікров'язкість мембран; біодоступність
• Online Access: https://surfacezbir.com.ua/index.php/surface/article/view/670
• Journal Title: Surface

Some features of the NDA structure, antioxidant properties, and the effect of NDA nanoparticles on the microviscosity of rat erythrocyte membranes were studied using the EPR method and spin probes. It is shown that when the concentration of DND in a water suspension equal to 1 mg/ml, partial agglomeration of DND particles occurs, which disappears when the suspension is diluted. The EPR spectra (recovery of the TEMPOL spin probe) revealed a change in the antioxidant activity of the studied DND with time, which allows the use of the EPR method for rapid testing of DND samples from different manufacturers. The calculation of the parameters of the EPR spectra showed that the presence of 25 µg/ml of DND in a suspension of red blood cells does not affect the correlation time of the probe in the membrane within the experimental error, and consequently, the microviscosity of the red blood cell membranes. The introduction of DND into a suspension of erythrocytes at a concentration of 25 μg/ml does not lead to significant changes in the microviscosity of erythrocyte membranes, which indicates a low cytotoxicity of DND at these concentrations.