The effect of metal chelators on the production of hydroxyl radicals in thylakoids.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F06%3A00003236" target="_blank" >RIV/61989592:15310/06:00003236 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
The effect of metal chelators on the production of hydroxyl radicals in thylakoids.
Original language description
The effect of metal chelators (EDTA, DTPA and Desferal) on the metal-catalyzed decomposition of hydrogen peroxide was studied using EPR spin-trapping spectroscopy. The formation of hydroxyl radicals (OH.) in both chemical (Fenton reaction) and biological(thylakoids) systems was stimulated by EDTA. DTPA promoted the generation of OH. in the presence of strong reducing agents, whereas in their absence it acted as an antioxidant. Desferal suppressed OH. production even in the presence of reductants. In our study we have shown that metal chelators can both stimulate and suppress the formation of OH., depending on the experimental conditions. In illuminated thylakoids we have observed prooxidant effect of EDTA and DTPA, possibly due to their reduction by some component of the electron transport chain. According to our results, metal chelators should not be used as antioxidants without prior testing of their effect in given samples.
Czech name
Efekt kovových chelátorů na produkci hydroxylových radikálů v thylakoidech.
Czech description
The effect of metal chelators (EDTA, DTPA and Desferal) on the metal-catalyzed decomposition of hydrogen peroxide was studied using EPR spin-trapping spectroscopy. The formation of hydroxyl radicals (OH.) in both chemical (Fenton reaction) and biological(thylakoids) systems was stimulated by EDTA. DTPA promoted the generation of OH. in the presence of strong reducing agents, whereas in their absence it acted as an antioxidant. Desferal suppressed OH. production even in the presence of reductants. In our study we have shown that metal chelators can both stimulate and suppress the formation of OH., depending on the experimental conditions. In illuminated thylakoids we have observed prooxidant effect of EDTA and DTPA, possibly due to their reduction by some component of the electron transport chain. According to our results, metal chelators should not be used as antioxidants without prior testing of their effect in given samples.
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BO - Biophysics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/1K04103" target="_blank" >1K04103: Reactive oxygen species in photosynthesis</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2006
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Photosynthesis Research
ISSN
0166-8595
e-ISSN
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Volume of the periodical
88
Issue of the periodical within the volume
3
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
7
Pages from-to
323-329
UT code for WoS article
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EID of the result in the Scopus database
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