Quantification and visualization of cellular uptake of TiO2 and Ag nanoparticles

Comparison of different ICP-MS techniques

I. Lun Hsiao, Frank S. Bierkandt, Philipp Reichardt, Andreas Luch, Yuh Jeen Huang, Norbert Jakubowski, Jutta Tentschert, Andrea Haase

研究成果: 雜誌貢獻文章

30 引文 (Scopus)

摘要

Background: Safety assessment of nanoparticles (NPs) requires techniques that are suitable to quantify tissue and cellular uptake of NPs. The most commonly applied techniques for this purpose are based on inductively coupled plasma mass spectrometry (ICP-MS). Here we apply and compare three different ICP-MS methods to investigate the cellular uptake of TiO2 (diameter 7 or 20 nm, respectively) and Ag (diameter 50 or 75 nm, respectively) NPs into differentiated mouse neuroblastoma cells (Neuro-2a cells). Cells were incubated with different amounts of the NPs. Thereafter they were either directly analyzed by laser ablation ICP-MS (LA-ICP-MS) or were lysed and lysates were analyzed by ICP-MS and by single particle ICP-MS (SP-ICP-MS). Results: All techniques confirmed that smaller particles were taken up to a higher extent when values were converted in an NP number-based dose metric. In contrast to ICP-MS and LA-ICP-MS, this measure is already directly provided through SP-ICP-MS. Analysis of NP size distribution in cell lysates by SP-ICP-MS indicates the formation of NP agglomerates inside cells. LA-ICP-MS imaging shows that some of the 75 nm Ag NPs seemed to be adsorbed onto the cell membranes and were not penetrating into the cells, while most of the 50 nm Ag NPs were internalized. LA-ICPMS confirms high cell-to-cell variability for NP uptake. Conclusions: Based on our data we propose to combine different ICP-MS techniques in order to reliably determine the average NP mass and number concentrations, NP sizes and size distribution patterns as well as cell-to-cell variations in NP uptake and intracellular localization.
原文英語
文章編號50
期刊Journal of Nanobiotechnology
14
發行號1
DOIs
出版狀態已發佈 - 2016
對外發佈Yes

指紋

Inductively coupled plasma mass spectrometry
Nanoparticles
Mass Spectrometry
Visualization
Laser Therapy
Laser ablation
Inductively coupled plasma
Cell membranes
Neuroblastoma

ASJC Scopus subject areas

  • Bioengineering
  • Medicine (miscellaneous)
  • Molecular Medicine
  • Biomedical Engineering
  • Applied Microbiology and Biotechnology
  • Pharmaceutical Science

引用此文

Quantification and visualization of cellular uptake of TiO2 and Ag nanoparticles : Comparison of different ICP-MS techniques. / Hsiao, I. Lun; Bierkandt, Frank S.; Reichardt, Philipp; Luch, Andreas; Huang, Yuh Jeen; Jakubowski, Norbert; Tentschert, Jutta; Haase, Andrea.

於: Journal of Nanobiotechnology, 卷 14, 編號 1, 50, 2016.

研究成果: 雜誌貢獻文章

Hsiao, I. Lun ; Bierkandt, Frank S. ; Reichardt, Philipp ; Luch, Andreas ; Huang, Yuh Jeen ; Jakubowski, Norbert ; Tentschert, Jutta ; Haase, Andrea. / Quantification and visualization of cellular uptake of TiO2 and Ag nanoparticles : Comparison of different ICP-MS techniques. 於: Journal of Nanobiotechnology. 2016 ; 卷 14, 編號 1.
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abstract = "Background: Safety assessment of nanoparticles (NPs) requires techniques that are suitable to quantify tissue and cellular uptake of NPs. The most commonly applied techniques for this purpose are based on inductively coupled plasma mass spectrometry (ICP-MS). Here we apply and compare three different ICP-MS methods to investigate the cellular uptake of TiO2 (diameter 7 or 20 nm, respectively) and Ag (diameter 50 or 75 nm, respectively) NPs into differentiated mouse neuroblastoma cells (Neuro-2a cells). Cells were incubated with different amounts of the NPs. Thereafter they were either directly analyzed by laser ablation ICP-MS (LA-ICP-MS) or were lysed and lysates were analyzed by ICP-MS and by single particle ICP-MS (SP-ICP-MS). Results: All techniques confirmed that smaller particles were taken up to a higher extent when values were converted in an NP number-based dose metric. In contrast to ICP-MS and LA-ICP-MS, this measure is already directly provided through SP-ICP-MS. Analysis of NP size distribution in cell lysates by SP-ICP-MS indicates the formation of NP agglomerates inside cells. LA-ICP-MS imaging shows that some of the 75 nm Ag NPs seemed to be adsorbed onto the cell membranes and were not penetrating into the cells, while most of the 50 nm Ag NPs were internalized. LA-ICPMS confirms high cell-to-cell variability for NP uptake. Conclusions: Based on our data we propose to combine different ICP-MS techniques in order to reliably determine the average NP mass and number concentrations, NP sizes and size distribution patterns as well as cell-to-cell variations in NP uptake and intracellular localization.",
keywords = "Cellular internalization, Laser ablation ICP-MS, Nanoparticles, Neurons, Single particle ICP-MS",
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T2 - Comparison of different ICP-MS techniques

AU - Hsiao, I. Lun

AU - Bierkandt, Frank S.

AU - Reichardt, Philipp

AU - Luch, Andreas

AU - Huang, Yuh Jeen

AU - Jakubowski, Norbert

AU - Tentschert, Jutta

AU - Haase, Andrea

PY - 2016

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N2 - Background: Safety assessment of nanoparticles (NPs) requires techniques that are suitable to quantify tissue and cellular uptake of NPs. The most commonly applied techniques for this purpose are based on inductively coupled plasma mass spectrometry (ICP-MS). Here we apply and compare three different ICP-MS methods to investigate the cellular uptake of TiO2 (diameter 7 or 20 nm, respectively) and Ag (diameter 50 or 75 nm, respectively) NPs into differentiated mouse neuroblastoma cells (Neuro-2a cells). Cells were incubated with different amounts of the NPs. Thereafter they were either directly analyzed by laser ablation ICP-MS (LA-ICP-MS) or were lysed and lysates were analyzed by ICP-MS and by single particle ICP-MS (SP-ICP-MS). Results: All techniques confirmed that smaller particles were taken up to a higher extent when values were converted in an NP number-based dose metric. In contrast to ICP-MS and LA-ICP-MS, this measure is already directly provided through SP-ICP-MS. Analysis of NP size distribution in cell lysates by SP-ICP-MS indicates the formation of NP agglomerates inside cells. LA-ICP-MS imaging shows that some of the 75 nm Ag NPs seemed to be adsorbed onto the cell membranes and were not penetrating into the cells, while most of the 50 nm Ag NPs were internalized. LA-ICPMS confirms high cell-to-cell variability for NP uptake. Conclusions: Based on our data we propose to combine different ICP-MS techniques in order to reliably determine the average NP mass and number concentrations, NP sizes and size distribution patterns as well as cell-to-cell variations in NP uptake and intracellular localization.

AB - Background: Safety assessment of nanoparticles (NPs) requires techniques that are suitable to quantify tissue and cellular uptake of NPs. The most commonly applied techniques for this purpose are based on inductively coupled plasma mass spectrometry (ICP-MS). Here we apply and compare three different ICP-MS methods to investigate the cellular uptake of TiO2 (diameter 7 or 20 nm, respectively) and Ag (diameter 50 or 75 nm, respectively) NPs into differentiated mouse neuroblastoma cells (Neuro-2a cells). Cells were incubated with different amounts of the NPs. Thereafter they were either directly analyzed by laser ablation ICP-MS (LA-ICP-MS) or were lysed and lysates were analyzed by ICP-MS and by single particle ICP-MS (SP-ICP-MS). Results: All techniques confirmed that smaller particles were taken up to a higher extent when values were converted in an NP number-based dose metric. In contrast to ICP-MS and LA-ICP-MS, this measure is already directly provided through SP-ICP-MS. Analysis of NP size distribution in cell lysates by SP-ICP-MS indicates the formation of NP agglomerates inside cells. LA-ICP-MS imaging shows that some of the 75 nm Ag NPs seemed to be adsorbed onto the cell membranes and were not penetrating into the cells, while most of the 50 nm Ag NPs were internalized. LA-ICPMS confirms high cell-to-cell variability for NP uptake. Conclusions: Based on our data we propose to combine different ICP-MS techniques in order to reliably determine the average NP mass and number concentrations, NP sizes and size distribution patterns as well as cell-to-cell variations in NP uptake and intracellular localization.

KW - Cellular internalization

KW - Laser ablation ICP-MS

KW - Nanoparticles

KW - Neurons

KW - Single particle ICP-MS

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