Raman imaging of single living cells: probing effects of non-cytotoxic doses of an anti-cancer drug

Identifying cell response to a chemotherapy drug treatment, in particular at the single cell level, is an important issue in patient management. This study aims at evaluating the effect of gemcitabine on single living cells using micro-Raman imaging. We used as a model the non-small lung cancer cell...

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Vydáno v:Analyst (London) Ročník 136; číslo 13; s. 2718
Hlavní autoři: Draux, Florence, Gobinet, Cyril, Sulé-Suso, Josep, Manfait, Michel, Jeannesson, Pierre, Sockalingum, Ganesh D
Médium: Journal Article
Jazyk:angličtina
Vydáno: England 07.07.2011
Témata:
Antineoplastic Agents - pharmacology
Antineoplastic Agents - toxicity
Cell Line, Tumor
Cell Proliferation - drug effects
Cell Survival
Deoxycytidine - analogs & derivatives
Deoxycytidine - pharmacology
Deoxycytidine - toxicity
DNA - metabolism
Dose-Response Relationship, Drug
Drug Screening Assays, Antitumor - methods
Humans
Intracellular Space - drug effects
Intracellular Space - metabolism
Molecular Imaging - methods
Principal Component Analysis
Proteins - metabolism
Quartz
RNA - metabolism
Single-Cell Analysis - methods
Spectrum Analysis, Raman
ISSN:1364-5528, 1364-5528
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Shrnutí:Identifying cell response to a chemotherapy drug treatment, in particular at the single cell level, is an important issue in patient management. This study aims at evaluating the effect of gemcitabine on single living cells using micro-Raman imaging. We used as a model the non-small lung cancer cell line, Calu-1, exposed to cytostatic doses (1 nM to 1 μM for 24 h and 48 h) of gemcitabine, an antitumor drug currently used in the treatment of lung cancer. Following drug treatment as a function of doses and incubation times, the Raman maps of single living cells were acquired. Cell biomolecules (DNA, RNA, and proteins) were chemically extracted and their spectral signatures used to evaluate their respective distribution in the cellular spectral information of control and treated cells. The quantification of these distributions reveals a significant effect of 100 nM gemcitabine at 48 h incubation (concomitant decrease of nucleic acids and increase of proteins). PCA analyses performed both on nuclear and extracted biomolecules spectra show a time-dependent effect of the drug. These promising results reveal that effects of subtoxic doses can be monitored at the single cell level highlighting the importance of such studies for clinical applications.
Bibliografie:ObjectType-Article-1
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ISSN:1364-5528
1364-5528
DOI:10.1039/c0an00998a