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Lipoic acid functionalized SiO_2@Ag nanoparticles. Synthesis, characterization and evaluation of biological activity

机译:硫辛酸官能化的SiO_2 @ Ag纳米颗粒。生物活性的合成,表征和评估

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摘要

A novel nanocomposite was obtained through the covalent immobilization of lipoic acid on the surface of silver nanoparticles-decorated silica nanoparticles (SiO_2@Ag). The hybrid organic - inorganic material obtained was characterized by Fourier transform infrared spectroscopy, thermal analysis, scanning and transmision electron microscopy, X-ray photoelectron spectroscopy and UV-Visible spectroscopy. Its antioxidant, cytotoxic, antimicrobial activity and influence on mammalian cells cycle were evaluated. The results of this study have shown that the functionalization of SiO_2@Ag with lipoic acid resulted in a composite with increased specificity of interaction with different mammalian cell lines and antioxidant activity, but with decreased cytotoxicity and antimicrobial properties. Therefore, the SiO_2@Ag functionalized with lipoic acid could be successfully used in certain concentrations to modulate the cell cycle, in order to obtain the desired anti-proliferative or stimulatory therapeutic effect.
机译:通过将硫辛酸共价固定在装饰有银纳米颗粒的二氧化硅纳米颗粒(SiO_2 @ Ag)的表面上,获得了一种新型的纳米复合材料。通过傅立叶变换红外光谱,热分析,扫描和透射电子显微镜,X射线光电子能谱和紫外可见光谱来表征所获得的有机-无机杂化材料。评估了其抗氧化剂,细胞毒性,抗菌活性以及对哺乳动物细胞周期的影响。这项研究的结果表明,用硫辛酸对SiO_2 @ Ag进行官能化处理可以使复合物与不同哺乳动物细胞系相互作用的特异性增加,抗氧化剂活性降低,但细胞毒性和抗菌性能却降低。因此,用硫辛酸官能化的SiO_2 @ Ag可以成功地以一定浓度用于调节细胞周期,以获得所需的抗增殖或刺激性治疗效果。

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