Imaging dynamic redox changes in mammalian cells with green fluorescent protein indicators

Colette T. Dooley, Timothy Dore, George T. Hanson, W. Coyt Jackson, S. James Remington, Roger Y. Tsien

Research output: Contribution to journalArticle

Abstract

Changes in the redox equilibrium of cells influence a host of cell functions. Alterations in the redox equilibrium are precipitated by changing either the glutathione/glutathione-disulfide ratio (GSH/GSSG) and/or the reduced/oxidized thioredoxin ratio. Redox-sensitive green fluorescent proteins (GFP) allow real time visualization of the oxidation state of the indicator. Ratios of fluorescence from excitation at 400 and 490 nm indicate the extent of oxidation and thus the redox potential while canceling out the amount of indicator and the absolute optical sensitivity. Because the indicator is genetically encoded, it can be targeted to specific proteins or organelles of interest and expressed in a wide variety of cells and organisms. We evaluated roGFP1 (GFP with mutations C48S, S147C, and Q204C) and roGFP2 (the same plus S65T) with physiologically or toxicologically relevant oxidants both in vitro and in living mammalian cells. Furthermore, we investigated the response of the redox probes under physiological redox changes during superoxide bursts in macrophage cells, hyperoxic and hypoxic conditions, and in responses to H 2O2-stimulating agents, e.g. epidermal growth factor and lysophosphatidic acid.

Original languageEnglish (US)
Pages (from-to)22284-22293
Number of pages10
JournalJournal of Biological Chemistry
Volume279
Issue number21
DOIs
StatePublished - May 21 2004

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Green Fluorescent Proteins
Oxidation-Reduction
Cells
Imaging techniques
Glutathione Disulfide
Oxidation
Thioredoxins
Macrophages
Epidermal Growth Factor
Oxidants
Superoxides
Organelles
Glutathione
Visualization
Fluorescence
Mutation
Proteins

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Cite this

Dooley, C. T., Dore, T., Hanson, G. T., Jackson, W. C., Remington, S. J., & Tsien, R. Y. (2004). Imaging dynamic redox changes in mammalian cells with green fluorescent protein indicators. Journal of Biological Chemistry, 279(21), 22284-22293. https://doi.org/10.1074/jbc.M312847200

Imaging dynamic redox changes in mammalian cells with green fluorescent protein indicators. / Dooley, Colette T.; Dore, Timothy; Hanson, George T.; Jackson, W. Coyt; Remington, S. James; Tsien, Roger Y.

In: Journal of Biological Chemistry, Vol. 279, No. 21, 21.05.2004, p. 22284-22293.

Research output: Contribution to journalArticle

Dooley, Colette T. ; Dore, Timothy ; Hanson, George T. ; Jackson, W. Coyt ; Remington, S. James ; Tsien, Roger Y. / Imaging dynamic redox changes in mammalian cells with green fluorescent protein indicators. In: Journal of Biological Chemistry. 2004 ; Vol. 279, No. 21. pp. 22284-22293.
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