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Kinetics of reaction of nitrogen dioxide with dihydrorhodamine and the reaction of the dihydrorhodamine radical with oxygen: implications for quantifying peroxynitrite formation in cells.

Abstract:

Dihydrorhodamine 123 (RhH2) has been used to detect 'reactive nitrogen species', including peroxynitrite and its radical decomposition products, peroxynitrite probably oxidizing RhH2 to rhodamine (Rh) via radical products rather than directly. In this study, the radical intermediate (RhH(.)) was generated by pulse radiolysis, and shown to react with oxygen with a rate constant k approximately 7 x 10(8) M(-1) s(-1). This fast reaction was exploited in experiments observing Rh being formed slow...

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Publisher copy:
10.1016/j.abb.2008.10.014

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Institution:
University of Oxford
Department:
Oxford, MSD, Oncology
Role:
Author
Journal:
Archives of biochemistry and biophysics
Volume:
484
Issue:
2
Pages:
122-126
Publication date:
2009-04-05
DOI:
EISSN:
1096-0384
ISSN:
0003-9861
URN:
uuid:573e5279-7e63-4d9f-b64c-76a78a956beb
Source identifiers:
267029
Local pid:
pubs:267029

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