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Real‐Time Label‐Free Monitoring of Nanoparticle Cell Uptake
Author(s) -
Suutari Teemu,
Silen Tiina,
S˛en Karaman Didem,
Saari Heikki,
Desai Diti,
Kerkelä Erja,
Laitinen Saara,
Hanzlikova Martina,
Rosenholm Jessica M.,
Yliperttula Marjo,
Viitala Tapani
Publication year - 2016
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.201601815
Subject(s) - hela , polyethylenimine , biophysics , nanoparticle , lysis , cell membrane , extracellular , chemistry , materials science , cell , nanotechnology , biochemistry , transfection , biology , gene
The surface plasmon resonance technique in combination with whole cell sensing is used for the first time for real‐time label‐free monitoring of nanoparticle cell uptake. The uptake kinetics of several types of nanoparticles relevant to drug delivery applications into HeLa cells is determined. The cell uptake of the nanoparticles is confirmed by confocal microscopy. The cell uptake of silica nanoparticles and polyethylenimine–plasmid DNA polyplexes is studied as a function of temperature, and the uptake energies are determined by Arrhenius plots. The phase transition temperature of the HeLa cell membrane is detected when monitoring cell uptake of silica nanoparticles at different temperatures. The HeLa cell uptake of the mesoporous silica nanoparticles is energy‐independent at temperatures slightly higher than the phase transition temperature of the HeLa cell membrane, while the uptake of polyethylenimine–DNA polyplexes is energy‐dependent and linear as a function of temperature with an activation energy of E a = 62 ± 7 kJ mol −1 = 15 ± 2 kcal mol −1 . The HeLa cell uptake of red blood cell derived extracellular vesicles is also studied as a function of the extracellular vesicle concentration. The results show a concentration dependent behavior reaching a saturation level of the extracellular vesicle uptake by HeLa cells.