Preserving elemental content in adherent mammalian cells for analysis by synchrotron-based x-ray fluorescence microscopy
Abstract
Summary Trace metals play important roles in biological function, and x‐ray fluorescence microscopy (XFM) provides a way to quantitatively image their distribution within cells. The faithfulness of these measurements is dependent on proper sample preparation. Using mouse embryonic fibroblast NIH/3T3 cells as an example, we compare various approaches to the preparation of adherent mammalian cells for XFM imaging under ambient temperature. Direct side‐by‐side comparison shows that plunge‐freezing‐based cryoimmobilization provides more faithful preservation than conventional chemical fixation for most biologically important elements including P, S, Cl, K, Fe, Cu, Zn and possibly Ca in adherent mammalian cells. Although cells rinsed with fresh media had a great deal of extracellular background signal for Cl and Ca, this approach maintained cells at the best possible physiological status before rapid freezing and it does not interfere with XFM analysis of other elements. If chemical fixation has to be chosen, the combination of 3% paraformaldehyde and 1.5 % glutaraldehyde preserves S, Fe, Cu and Zn better than either fixative alone. When chemically fixed cells were subjected to a variety of dehydration processes, air drying was proved to be more suitable than other drying methods such as graded ethanol dehydration and freeze drying. This first detailedmore »
- Authors:
-
- Department of Physics & Astronomy, Weinberg College of Arts and Sciences, Evanston Illinois U.S.A
- Department of Radiation Oncology, Northwestern University, Chicago Illinois U.S.A
- Advanced Photon Source, Argonne National Laboratory, Argonne Illinois U.S.A
- Department of Physics & Astronomy, Weinberg College of Arts and Sciences, Evanston Illinois U.S.A, Advanced Photon Source, Argonne National Laboratory, Argonne Illinois U.S.A
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Institutes of Health (NIH)
- OSTI Identifier:
- 1336508
- Alternate Identifier(s):
- OSTI ID: 1390261; OSTI ID: 1464537
- Grant/Contract Number:
- AC02-06CH11357; R01 GM104530; DE‐AC02‐06CH11357
- Resource Type:
- Published Article
- Journal Name:
- Journal of Microscopy
- Additional Journal Information:
- Journal Name: Journal of Microscopy Journal Volume: 265 Journal Issue: 1; Journal ID: ISSN 0022-2720
- Publisher:
- Wiley
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; 60 APPLIED LIFE SCIENCES; Biological; Cryomicroscopy; X-ray microscopy; specimen preparation; x-ray microanalysis
Citation Formats
JIN, QIAOLING, PAUNESKU, TATJANA, LAI, BARRY, GLEBER, SOPHIE-CHARLOTTE, CHEN, SI, FINNEY, LYDIA, VINE, DAVID, VOGT, STEFAN, WOLOSCHAK, GAYLE, and JACOBSEN, CHRIS. Preserving elemental content in adherent mammalian cells for analysis by synchrotron-based x-ray fluorescence microscopy. United Kingdom: N. p., 2016.
Web. doi:10.1111/jmi.12466.
JIN, QIAOLING, PAUNESKU, TATJANA, LAI, BARRY, GLEBER, SOPHIE-CHARLOTTE, CHEN, SI, FINNEY, LYDIA, VINE, DAVID, VOGT, STEFAN, WOLOSCHAK, GAYLE, & JACOBSEN, CHRIS. Preserving elemental content in adherent mammalian cells for analysis by synchrotron-based x-ray fluorescence microscopy. United Kingdom. https://doi.org/10.1111/jmi.12466
JIN, QIAOLING, PAUNESKU, TATJANA, LAI, BARRY, GLEBER, SOPHIE-CHARLOTTE, CHEN, SI, FINNEY, LYDIA, VINE, DAVID, VOGT, STEFAN, WOLOSCHAK, GAYLE, and JACOBSEN, CHRIS. Wed .
"Preserving elemental content in adherent mammalian cells for analysis by synchrotron-based x-ray fluorescence microscopy". United Kingdom. https://doi.org/10.1111/jmi.12466.
@article{osti_1336508,
title = {Preserving elemental content in adherent mammalian cells for analysis by synchrotron-based x-ray fluorescence microscopy},
author = {JIN, QIAOLING and PAUNESKU, TATJANA and LAI, BARRY and GLEBER, SOPHIE-CHARLOTTE and CHEN, SI and FINNEY, LYDIA and VINE, DAVID and VOGT, STEFAN and WOLOSCHAK, GAYLE and JACOBSEN, CHRIS},
abstractNote = {Summary Trace metals play important roles in biological function, and x‐ray fluorescence microscopy (XFM) provides a way to quantitatively image their distribution within cells. The faithfulness of these measurements is dependent on proper sample preparation. Using mouse embryonic fibroblast NIH/3T3 cells as an example, we compare various approaches to the preparation of adherent mammalian cells for XFM imaging under ambient temperature. Direct side‐by‐side comparison shows that plunge‐freezing‐based cryoimmobilization provides more faithful preservation than conventional chemical fixation for most biologically important elements including P, S, Cl, K, Fe, Cu, Zn and possibly Ca in adherent mammalian cells. Although cells rinsed with fresh media had a great deal of extracellular background signal for Cl and Ca, this approach maintained cells at the best possible physiological status before rapid freezing and it does not interfere with XFM analysis of other elements. If chemical fixation has to be chosen, the combination of 3% paraformaldehyde and 1.5 % glutaraldehyde preserves S, Fe, Cu and Zn better than either fixative alone. When chemically fixed cells were subjected to a variety of dehydration processes, air drying was proved to be more suitable than other drying methods such as graded ethanol dehydration and freeze drying. This first detailed comparison for x‐ray fluorescence microscopy shows how detailed quantitative conclusions can be affected by the choice of cell preparation method.},
doi = {10.1111/jmi.12466},
journal = {Journal of Microscopy},
number = 1,
volume = 265,
place = {United Kingdom},
year = {Wed Aug 31 00:00:00 EDT 2016},
month = {Wed Aug 31 00:00:00 EDT 2016}
}
https://doi.org/10.1111/jmi.12466
Web of Science
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