Change in the Microviscosity of Erythrocyte Membranes and Proteins in Blood Plasma after Graphene Oxide Addition: The ESR Spectroscopy Study. (1st April 2019)

• Record Type: Journal Article
• Authors: Karachevtsev, V. A.; Kartel, N. T.; Ivanov, L. V.; Lyapunov, A. N.; Nardid, O. A.; Cherkashina, Ya. O.; Ivanov, A. Yu.
• Other Names: Khan Rizwan Hasan Academic Editor.
• Is Part Of: Journal of spectroscopy. Volume 2019(2019)
• Publication Date: 2019-04-01
• Subjects: Spectrum analysis -- Periodicals; 543.505
• DOI: 10.1155/2019/8083207
• Languages: English
• ISSNs: 2314-4920

Abstract

Abstract : The change in the microviscosity of erythrocyte membranes and the proteins in blood plasma after graphene oxide addition is studied by the ESR spectroscopy exploiting two spin probes with different lipophilic components in the structures. Experiments with charged spin probe2 embedded into the erythrocyte membrane showed that the introduction of graphene oxide in small concentrations (∼70 μ g/ml) into a suspension of erythrocytes did not lead to significant changes in the microviscosity of their membranes. Correlation times of hydrophobic spin probe1 adsorbed to hydrophobic pockets of plasma proteins demonstrate a gradual slowdown at the graphene oxide injection into blood plasma that indicates a small deformation of the hydrophobic cavity of protein at the adsorption. However, this protein binding with graphene oxide does not cause the displacement of the spin probe from their hydrophobic cavities, which is evidence about small changes in the protein secondary structure. The obtained results indicate the insignificant cytotoxicity effect of small concentrations of graphene oxide for erythrocytes and blood plasma.