Surface-modified TiO2 nanoparticles with ascorbic acid: Antioxidant properties and efficiency against DNA damage in vitro

被引：32

作者：

Bajic, Vladan ^{[1
]}

Spremo-Potparevic, Biljana ^{[2
]}

Zivkovic, Lada ^{[2
]}

Cabarkapa, Andrea ^{[2
]}

Kotur-Stevuljevic, Jelena ^{[3
]}

Isenovic, Esma ^{[1
]}

Sredojevic, Dusan ^{[1
,4
]}

Vukoje, Ivana ^{[1
]}

Lazic, Vesna ^{[1
]}

Ahrenkiel, S. Phillip ^{[5
]}

Nedeljkovic, Jovan M. ^{[1
]}

机构：

[1] Univ Belgrade, Inst Nucl Sci Vinca, POB 522, Belgrade, Serbia

[2] Univ Belgrade, Dept Physiol, Fac Pharm, Belgrade, Serbia

[3] Univ Belgrade, Dept Biochem, Fac Pharm, Belgrade, Serbia

[4] Texas A&M Univ Qatar, POB 23874, Doha, Qatar

[5] South Dakota Sch Mines & Technol, 501 E St Joseph St, Rapid City, SD 57701 USA

来源：

COLLOIDS AND SURFACES B-BIOINTERFACES | 2017年 / 155卷

关键词：

Ascorbic acid; TiO2; nanoparticles; Charge transfer complex; Antigenotoxic properties; Antioxidative properties; TITANIUM-DIOXIDE NANOPARTICLES; CATECHOLATE-TYPE LIGANDS; ANATASE NANOPARTICLES; COMBINED DFT; OXIDATIVE STRESS; CARBON-BLACK; GENOTOXICITY; REDUCTION; TOXICITY; PHOTOCATALYSIS;

D O I：

10.1016/j.colsurfb.2017.04.032

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

The antigenotoxic and antioxidative properties of surface-modified TiO2 nanoparticles (NPs) with ascorbic acid (AA) were compared with those of constituents (free AA and bare TiO2 NPs). Colloids consisting of the TiO2 NPs with anatase crystal structure were prepared by acidic hydrolysis of TiCl4. The synthesized TiO2 NPs were characterized using transmission electron microscopy and X-ray diffraction analysis. The charge transfer (CT) complex formation between surface Ti atoms and AA is indicated by immediate appearance of red color. Composition and stability constants of CT complex were determined using Job's method and Banesi-Hildebrand analysis, respectively. The surface structure of CT complex was determined from infra-red spectra of free and bound AA to the surface Ti atoms. The experimental data were supported with quantum chemical calculations based on density functional theory (DFT). The antigenotoxic potential of CT complex was evaluated in leukocytes of whole blood cells in vitro by comet assay method. For evaluation of antioxidant properties, total antioxidant status (TAS) and total oxidant status (TOS) were determined in human serum pool in vitro. The presented results indicate that bare TiO2 NPs have more pronounced antigenotoxic effects in comparison with either surface-modified TiO2 NPs with AA or free AA. No significant differences between the antigenotoxic and antioxidative properties of free and bound AA on the TiO2 NPs were noticed in the investigated concentration range. It seems that surface-modified TiO2 NPs with AA and/or similar compounds can be used to maintain its beneficial activities. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：323 / 331

页数：9

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