Application of a trityl-based radical probe for measuring superoxide

Cëcile Rizzi, Alexandre Samouilov, Vijay Kumar Kutala, Narasimham L. Parinandi, Jay L. Zweier, Periannan Kuppusamy

Research output: Contribution to journalArticle

Abstract

The use of triarylmethyl (trityl) free radical, TAM OX063, for detection of superoxide in aqueous solutions by electron paramagnetic resonance (EPR) spectroscopy was investigated. TAM is paramagnetic (EPR active), highly soluble in water and exhibits a single sharp EPR peak in aqueous media. It is also highly stable in presence of many oxidoreductants such as ascorbate and glutathione that are present in the biological systems. TAM reacts with superoxide with an apparent second order rate constant of 3.1 × 10 3 M-1 s-1. The specific reactivity of TAM with superoxide, which leads to loss of EPR signal, was utilized to detect the generation of superoxide in various chemical (light/riboflavin/electron/donor), enzymatic (xanthine/xanthine oxidase), and cellular (stimulated neutrophils) model systems. The changes in the EPR line-width, induced by molecular oxygen, were utilized in the simultaneous determination of consumption of oxygen in the model systems. The effects of flux of superoxide and concentration of TAM on the efficiency of detection of superoxide were studied. The use of TAM for detection of superoxide offers unique advantages namely, (i) the utilization of very low concentration of the probe, (ii) its stability to bioreduction, and (iii) its use in the simultaneous determination of concentrations of superoxide and oxygen.

Original languageEnglish (US)
Pages (from-to)1608-1618
Number of pages11
JournalFree Radical Biology and Medicine
Volume35
Issue number12
DOIs
StatePublished - Dec 15 2003
Externally publishedYes

Fingerprint

Superoxides
Electron Spin Resonance Spectroscopy
Paramagnetic resonance
Oxygen
Xanthine
Riboflavin
Molecular oxygen
Xanthine Oxidase
Biological systems
Oxygen Consumption
Linewidth
Free Radicals
Glutathione
Rate constants
Spectrum Analysis
Neutrophils
Spectroscopy
Electrons
Fluxes
Light

Keywords

  • EPR
  • Free radicals
  • Neutrophils
  • Oximetry
  • Riboflavin
  • Spin trapping
  • Superoxide
  • Trityl radical
  • Xanthine oxidase

ASJC Scopus subject areas

  • Medicine(all)
  • Toxicology
  • Clinical Biochemistry

Cite this

Rizzi, C., Samouilov, A., Kumar Kutala, V., Parinandi, N. L., Zweier, J. L., & Kuppusamy, P. (2003). Application of a trityl-based radical probe for measuring superoxide. Free Radical Biology and Medicine, 35(12), 1608-1618. https://doi.org/10.1016/j.freeradbiomed.2003.09.014

Application of a trityl-based radical probe for measuring superoxide. / Rizzi, Cëcile; Samouilov, Alexandre; Kumar Kutala, Vijay; Parinandi, Narasimham L.; Zweier, Jay L.; Kuppusamy, Periannan.

In: Free Radical Biology and Medicine, Vol. 35, No. 12, 15.12.2003, p. 1608-1618.

Research output: Contribution to journalArticle

Rizzi, C, Samouilov, A, Kumar Kutala, V, Parinandi, NL, Zweier, JL & Kuppusamy, P 2003, 'Application of a trityl-based radical probe for measuring superoxide', Free Radical Biology and Medicine, vol. 35, no. 12, pp. 1608-1618. https://doi.org/10.1016/j.freeradbiomed.2003.09.014
Rizzi C, Samouilov A, Kumar Kutala V, Parinandi NL, Zweier JL, Kuppusamy P. Application of a trityl-based radical probe for measuring superoxide. Free Radical Biology and Medicine. 2003 Dec 15;35(12):1608-1618. https://doi.org/10.1016/j.freeradbiomed.2003.09.014
Rizzi, Cëcile ; Samouilov, Alexandre ; Kumar Kutala, Vijay ; Parinandi, Narasimham L. ; Zweier, Jay L. ; Kuppusamy, Periannan. / Application of a trityl-based radical probe for measuring superoxide. In: Free Radical Biology and Medicine. 2003 ; Vol. 35, No. 12. pp. 1608-1618.
@article{80c073e50f0942759ad500b32265e080,
title = "Application of a trityl-based radical probe for measuring superoxide",
abstract = "The use of triarylmethyl (trityl) free radical, TAM OX063, for detection of superoxide in aqueous solutions by electron paramagnetic resonance (EPR) spectroscopy was investigated. TAM is paramagnetic (EPR active), highly soluble in water and exhibits a single sharp EPR peak in aqueous media. It is also highly stable in presence of many oxidoreductants such as ascorbate and glutathione that are present in the biological systems. TAM reacts with superoxide with an apparent second order rate constant of 3.1 × 10 3 M-1 s-1. The specific reactivity of TAM with superoxide, which leads to loss of EPR signal, was utilized to detect the generation of superoxide in various chemical (light/riboflavin/electron/donor), enzymatic (xanthine/xanthine oxidase), and cellular (stimulated neutrophils) model systems. The changes in the EPR line-width, induced by molecular oxygen, were utilized in the simultaneous determination of consumption of oxygen in the model systems. The effects of flux of superoxide and concentration of TAM on the efficiency of detection of superoxide were studied. The use of TAM for detection of superoxide offers unique advantages namely, (i) the utilization of very low concentration of the probe, (ii) its stability to bioreduction, and (iii) its use in the simultaneous determination of concentrations of superoxide and oxygen.",
keywords = "EPR, Free radicals, Neutrophils, Oximetry, Riboflavin, Spin trapping, Superoxide, Trityl radical, Xanthine oxidase",
author = "C{\"e}cile Rizzi and Alexandre Samouilov and {Kumar Kutala}, Vijay and Parinandi, {Narasimham L.} and Zweier, {Jay L.} and Periannan Kuppusamy",
year = "2003",
month = "12",
day = "15",
doi = "10.1016/j.freeradbiomed.2003.09.014",
language = "English (US)",
volume = "35",
pages = "1608--1618",
journal = "Free Radical Biology and Medicine",
issn = "0891-5849",
publisher = "Elsevier Inc.",
number = "12",

}

TY - JOUR

T1 - Application of a trityl-based radical probe for measuring superoxide

AU - Rizzi, Cëcile

AU - Samouilov, Alexandre

AU - Kumar Kutala, Vijay

AU - Parinandi, Narasimham L.

AU - Zweier, Jay L.

AU - Kuppusamy, Periannan

PY - 2003/12/15

Y1 - 2003/12/15

N2 - The use of triarylmethyl (trityl) free radical, TAM OX063, for detection of superoxide in aqueous solutions by electron paramagnetic resonance (EPR) spectroscopy was investigated. TAM is paramagnetic (EPR active), highly soluble in water and exhibits a single sharp EPR peak in aqueous media. It is also highly stable in presence of many oxidoreductants such as ascorbate and glutathione that are present in the biological systems. TAM reacts with superoxide with an apparent second order rate constant of 3.1 × 10 3 M-1 s-1. The specific reactivity of TAM with superoxide, which leads to loss of EPR signal, was utilized to detect the generation of superoxide in various chemical (light/riboflavin/electron/donor), enzymatic (xanthine/xanthine oxidase), and cellular (stimulated neutrophils) model systems. The changes in the EPR line-width, induced by molecular oxygen, were utilized in the simultaneous determination of consumption of oxygen in the model systems. The effects of flux of superoxide and concentration of TAM on the efficiency of detection of superoxide were studied. The use of TAM for detection of superoxide offers unique advantages namely, (i) the utilization of very low concentration of the probe, (ii) its stability to bioreduction, and (iii) its use in the simultaneous determination of concentrations of superoxide and oxygen.

AB - The use of triarylmethyl (trityl) free radical, TAM OX063, for detection of superoxide in aqueous solutions by electron paramagnetic resonance (EPR) spectroscopy was investigated. TAM is paramagnetic (EPR active), highly soluble in water and exhibits a single sharp EPR peak in aqueous media. It is also highly stable in presence of many oxidoreductants such as ascorbate and glutathione that are present in the biological systems. TAM reacts with superoxide with an apparent second order rate constant of 3.1 × 10 3 M-1 s-1. The specific reactivity of TAM with superoxide, which leads to loss of EPR signal, was utilized to detect the generation of superoxide in various chemical (light/riboflavin/electron/donor), enzymatic (xanthine/xanthine oxidase), and cellular (stimulated neutrophils) model systems. The changes in the EPR line-width, induced by molecular oxygen, were utilized in the simultaneous determination of consumption of oxygen in the model systems. The effects of flux of superoxide and concentration of TAM on the efficiency of detection of superoxide were studied. The use of TAM for detection of superoxide offers unique advantages namely, (i) the utilization of very low concentration of the probe, (ii) its stability to bioreduction, and (iii) its use in the simultaneous determination of concentrations of superoxide and oxygen.

KW - EPR

KW - Free radicals

KW - Neutrophils

KW - Oximetry

KW - Riboflavin

KW - Spin trapping

KW - Superoxide

KW - Trityl radical

KW - Xanthine oxidase

UR - http://www.scopus.com/inward/record.url?scp=0347627466&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0347627466&partnerID=8YFLogxK

U2 - 10.1016/j.freeradbiomed.2003.09.014

DO - 10.1016/j.freeradbiomed.2003.09.014

M3 - Article

VL - 35

SP - 1608

EP - 1618

JO - Free Radical Biology and Medicine

JF - Free Radical Biology and Medicine

SN - 0891-5849

IS - 12

ER -