NDLI: Superoxide anion radical scavenging property of catecholamines.

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Superoxide anion radical scavenging property of catecholamines.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kladna, Aleksandra Berczynski, Pawel Kruk, Irena Michalska, Teresa Aboul-Enein, Hassan Y.
Description	Country affiliation: Poland Author Affiliation: Kladna A ( Department of History of Medicine and Medical Ethics, Pomeranian Medical University, Rybacka 1, 70-204 Szczecin, Poland.)
Abstract	The direct effect of the four catecholamines (adrenaline, noradrenaline, dopamine and isoproterenol) on superoxide anion radicals (O2â¢) was investigated. The reaction between 18-crown-6-ether and potassium superoxide in dimethylsulfoxide was used as a source of O2â¢. The reactivity of catecholamines with O2â¢ was examined using chemiluminescence, reduction of nitroblue tetrazolium and electron paramagnetic resonance spin-trapping techniques. 5,5-Dimethyl-1-pyrroline-N-oxide was included as the spin trap. The results showed that the four catecholamines were effective and efficient in inhibiting chemiluminescence accompanying the potassium superoxide/18-crown-6-ether system in a dose-dependent manner over the range 0.05-2 mM in the following order: adrenaline > noradrenaline > dopamine > isoproterenol, with, IC50 = 0.15 ± 0.02 mM 0.21 ± 0.03 mM, 0.27 ± 0.03 mM and 0.50 ± 0.04 mM, respectively. The catecholamines examined also exhibited a strong scavenging effect towards O2â¢ when evaluated this property by the inhibition of nitroblue tetrazolium reduction (56-73% at 1 M concentration). A very similar capacity of O2â¢ scavenging was monitored in the 5,5-dimethyl-1-pyrroline-N-oxide spin-trapping assay. The results suggest that catecholamines tested may involve a direct effect on scavenging O2- radicals.
File Format	HTM / HTML
ISSN	15227235
Issue Number	4
Volume Number	28
e-ISSN	15227243
Journal	Luminescence
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2013-07-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Biophysics Discipline Biochemistry Catecholamines Chemistry Free Radical Scavengers Superoxides Anions Crown Ethers Luminescence Molecular Structure Journal Article
Content Type	Text
Resource Type	Article
Subject	Chemistry Biophysics

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