Relevance of the capacity of phosphorylated fructose to scavenge the hydroxyl radical.

2.50
Hdl Handle:
http://hdl.handle.net/10541/53453
Title:
Relevance of the capacity of phosphorylated fructose to scavenge the hydroxyl radical.
Authors:
Spasojević, Ivan; Mojović, Milos; Blagojević, Dusko; Spasić, Snezana D; Jones, David R; Nikolić-Kokić, Aleksandra; Spasić, Mihajlo B
Abstract:
The hydroxyl radical (*OH) has detrimental biological activity due to its very high reactivity. Our experiments were designed to determine the effects of equimolar concentrations of glucose, fructose and mannitol and three phosphorylated forms of fructose (fructose-1-phosphate (F1P); fructose-6-phosphate (F6P); and fructose-1,6-bis(phosphate) (F16BP)) on *OH radical production via the Fenton reaction. EPR spectroscopy using spin-trap DEPMPO was applied to detect radical production. We found that the percentage inhibition of *OH radical formation decreased in the order F16BP>F1P>F6P>fructose>mannitol=glucose. As ketoses can sequester redox-active iron thus preventing the Fenton reaction, the Haber-Weiss-like system was also employed to generate *OH, so that the effect of iron sequestration could be distinguished from direct *OH radical scavenging. In the latter system, the rank order of *OH scavenging activity was F16BP>F1P>F6P>fructose=mannitol=glucose. Our results clearly demonstrate that intracellular phosphorylated forms of fructose have more scavenging properties than fructose or glucose, leading us to conclude that the acute administration of fructose could overcome the body's reaction to exogenous antioxidants during appropriate therapy in certain pathophysiological conditions related to oxidative stress, such as sepsis, neurodegenerative diseases, atherosclerosis, malignancy, and some complications of pregnancy.
Affiliation:
Institute for Multidisciplinary Research, University of Belgrade, Belgrade, Serbia. ivan@cms.bg.ac.yu
Citation:
Relevance of the capacity of phosphorylated fructose to scavenge the hydroxyl radical. 2009, 344 (1):80-4 Carbohydr. Res.
Journal:
Carbohydrate Research
Issue Date:
5-Jan-2009
URI:
http://hdl.handle.net/10541/53453
DOI:
10.1016/j.carres.2008.09.025
PubMed ID:
18947823
Type:
Article
Language:
en
ISSN:
1873-426X
Appears in Collections:
Inositide Laboratory; All Paterson Institute for Cancer Research

Full metadata record

DC FieldValue Language
dc.contributor.authorSpasojević, Ivan-
dc.contributor.authorMojović, Milos-
dc.contributor.authorBlagojević, Dusko-
dc.contributor.authorSpasić, Snezana D-
dc.contributor.authorJones, David R-
dc.contributor.authorNikolić-Kokić, Aleksandra-
dc.contributor.authorSpasić, Mihajlo B-
dc.date.accessioned2009-03-09T16:27:30Z-
dc.date.available2009-03-09T16:27:30Z-
dc.date.issued2009-01-05-
dc.identifier.citationRelevance of the capacity of phosphorylated fructose to scavenge the hydroxyl radical. 2009, 344 (1):80-4 Carbohydr. Res.en
dc.identifier.issn1873-426X-
dc.identifier.pmid18947823-
dc.identifier.doi10.1016/j.carres.2008.09.025-
dc.identifier.urihttp://hdl.handle.net/10541/53453-
dc.description.abstractThe hydroxyl radical (*OH) has detrimental biological activity due to its very high reactivity. Our experiments were designed to determine the effects of equimolar concentrations of glucose, fructose and mannitol and three phosphorylated forms of fructose (fructose-1-phosphate (F1P); fructose-6-phosphate (F6P); and fructose-1,6-bis(phosphate) (F16BP)) on *OH radical production via the Fenton reaction. EPR spectroscopy using spin-trap DEPMPO was applied to detect radical production. We found that the percentage inhibition of *OH radical formation decreased in the order F16BP>F1P>F6P>fructose>mannitol=glucose. As ketoses can sequester redox-active iron thus preventing the Fenton reaction, the Haber-Weiss-like system was also employed to generate *OH, so that the effect of iron sequestration could be distinguished from direct *OH radical scavenging. In the latter system, the rank order of *OH scavenging activity was F16BP>F1P>F6P>fructose=mannitol=glucose. Our results clearly demonstrate that intracellular phosphorylated forms of fructose have more scavenging properties than fructose or glucose, leading us to conclude that the acute administration of fructose could overcome the body's reaction to exogenous antioxidants during appropriate therapy in certain pathophysiological conditions related to oxidative stress, such as sepsis, neurodegenerative diseases, atherosclerosis, malignancy, and some complications of pregnancy.en
dc.language.isoenen
dc.subjectHydroxyl Radicalen
dc.subjectSpectroscopyen
dc.subjectPhosphorylated Fructoseen
dc.titleRelevance of the capacity of phosphorylated fructose to scavenge the hydroxyl radical.en
dc.typeArticleen
dc.contributor.departmentInstitute for Multidisciplinary Research, University of Belgrade, Belgrade, Serbia. ivan@cms.bg.ac.yuen
dc.identifier.journalCarbohydrate Researchen
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