The tetrazolium dyes MTS and XTT provide new quantitative assays for superoxide and superoxide dismutase
Article
Article Title | The tetrazolium dyes MTS and XTT provide new quantitative assays for superoxide and superoxide dismutase |
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ERA Journal ID | 2219 |
Article Category | Article |
Authors | Sutherland, Mark W. (Author) and Learmonth, Barbara A. (Author) |
Journal Title | Free Radical Research |
Journal Citation | 27 (3), pp. 283-289 |
Number of Pages | 7 |
Year | 1997 |
Publisher | Taylor & Francis |
Place of Publication | Netherlands |
ISSN | 1029-2470 |
1071-5762 | |
Digital Object Identifier (DOI) | https://doi.org/10.3109/10715769709065766 |
Web Address (URL) | https://www.tandfonline.com/doi/abs/10.3109/10715769709065766 |
Abstract | The tetrazolium dyes MTS and XTT were reduced to their soluble formazans by superoxide radical anions (O2_) produced by the oxidation of xanthine by xanthine oxidase under standard conditions. These reactions were compared to the well-known reductions of NBT and cytochrome c by the xanthine/xanthine oxidase system. Reduction of the dyes was completely inhibited by superoxide dismutase (SOD). Rate constants for the reaction of MTS and XTT with O2_: were estimated at 1.3 times .1 times 105 M-1s-1 and 8.6 times .8 times 104 M-1s-1 respectively. The stable MTS and XTT formazans have high extinction coefficients in the visible range which enable sensitive detection and quantification of superoxide radicals, avoiding some of the problems inherent in assays based on production of the insoluble NBT formazan. MTS and XTT have considerable potential both for the quantitative assay of radical production in living tissues and for the assay of superoxide dismutase activity in tissue extracts. Implications for the interpretation of cell culture growth assays which employ these dyes are discussed. |
Keywords | MTS; NBT; XlT; cytochrome c; superoxide assay; tetrazolium dyes |
ANZSRC Field of Research 2020 | 319999. Other biological sciences not elsewhere classified |
310105. Cellular interactions (incl. adhesion, matrix, cell wall) | |
340102. Bioassays | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Department of Biological and Physical Sciences |
Office of Research |
https://research.usq.edu.au/item/9y5y4/the-tetrazolium-dyes-mts-and-xtt-provide-new-quantitative-assays-for-superoxide-and-superoxide-dismutase
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