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In-situ characterization of porcine fibroblasts in response to silver ions by Raman spectroscopy and liquid scanning transmission electron microscopy

文献类型： 外文期刊

作者： Zhao, Yuanfeng 1 ; Zhang, Wei 3 ; Van Devener, Brian 4 ; Bunch, Thomas D. 1 ; Zhou, Anhong 3 ; Isom, S. Clay 1 ;

作者机构： 1.Utah State Univ, Dept Anim Dairy & Vet Sci, Logan, UT 84322 USA

2.Guizhou Acad Agr Sci, Inst Anim Husb & Vet Sci, Guiyang 550005, Guizhou, Peoples R China

3.Utah State Univ, Dept Biol Engn, Logan, UT 84322 USA

4.Univ Utah, Surface Anal Lab, Salt, UT 84112 USA

关键词： Liquid STEM-EDS; Raman spectroscopy; Silver ion; In-situ analysis

期刊名称：TALANTA （ 影响因子：6.1； 五年影响因子：5.4 ）

ISSN： 0039-9140

年卷期： 2022 年 246 卷

页码：

收录情况： SCI

摘要： Since silver ion is known for its antimicrobial function, most of the research has focused mainly on toxicity effects rather than the role of silver ion in general biology and the behind mechanism of actions of silver ion in mammalian cells. Moreover, a conventional in vitro approach to estimate the effects of silver ion on cells does not provide information about the biochemical changes and might accompany artifacts due to invasive and destructive sample preparation processes. In the present study, in-situ real time approaches were applied to evaluate the impact of silver ion (0.57, 1.34, 1.96, 2.33 mg/L) on fibroblast cells. Raman spectroscopy analysis showed that Raman peak intensities of proteins and nucleic acids significantly increased in the cells after exposure to silver ion for 21 h, especially at relatively higher levels 1.34, 1.96, and 2.33 mg/L. Raman peak at 1585 cm(-1) and liquid scanning transmission electron microscopy energy-dispersive x-ray spectroscopy (STEM-EDS) analysis revealed the fate of silver ion that was taken up by the cell and reduced into metallic silver accumulating in the cell as silver nanoparticles. These results suggest cells were undergoing different activities such as enhanced metabolic activities rather than cell apoptosis or cell death. Additionally, Raman spectroscopy predicted the level of silver ion exposed to the cell at 2.11 +/- 0.38 and 1.73 +/- 0.26 mg/L by the PLS prediction model, compared with the results measured by inductively coupled plasma mass spectrometry (ICP-MS), 2.14 +/- 0.07 and 1.87 +/- 0.07 mg/L respectively, suggesting Raman spectroscopy can provide a new and fast approach to determine and measure the concentration of silver ion or probably other tested molecules treated to the cell for the future research.

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