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Label‐Free Imaging of Nanoparticle Uptake Competition in Single Cells by Hyperspectral Stimulated Raman Scattering
Author(s) -
Huang Bin,
Yan Shuai,
Xiao Lin,
Ji Rong,
Yang Liuyan,
Miao AiJun,
Wang Ping
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201703246
Subject(s) - nanobiotechnology , hyperspectral imaging , nanoparticle , nanotechnology , nanotoxicology , materials science , raman scattering , raman spectroscopy , optics , computer science , artificial intelligence , physics
Abstract Imaging and quantification of nanoparticles in single cells in their most natural condition are expected to facilitate the biotechnological applications of nanoparticles and allow for better assessment of their biosafety risks. However, current imaging modalities either require tedious sample preparation or only apply to nanoparticles with specific physicochemical characteristics. Here, the emerging hyperspectral stimulated Raman scattering (SRS) microscopy, as a label‐free and nondestructive imaging method, is used for the first time to investigate the subcellular distribution of nanoparticles in the protozoan Tetrahymena thermophila . The two frequently studied nanoparticles, polyacrylate‐coated α‐Fe 2 O 3 and TiO 2 , are found to have different subcellular distribution pattern as a result of their dissimilar uptake routes. Significant uptake competition between these two types of nanoparticles is further discovered, which should be paid attention to in future bioapplications of nanoparticles. Overall, this study illustrates the great promise of hyperspectral SRS as an analytical imaging tool in nanobiotechnology and nanotoxicology.