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Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F06%3A00003236%21RIV07-MSM-15310___
rdf:type
n13:Vysledek skos:Concept
dcterms: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. 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. 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.
dcterms:title
Efekt kovových chelátorů na produkci hydroxylových radikálů v thylakoidech. The effect of metal chelators on the production of hydroxyl radicals in thylakoids. The effect of metal chelators on the production of hydroxyl radicals in thylakoids.
skos:prefLabel
The effect of metal chelators on the production of hydroxyl radicals in thylakoids. Efekt kovových chelátorů na produkci hydroxylových radikálů v thylakoidech. The effect of metal chelators on the production of hydroxyl radicals in thylakoids.
skos:notation
RIV/61989592:15310/06:00003236!RIV07-MSM-15310___
n3:strany
323-329
n3:aktivita
n5:Z n5:P
n3:aktivity
P(1K04103), Z(MSM6198959215)
n3:cisloPeriodika
3
n3:dodaniDat
n14:2007
n3:domaciTvurceVysledku
n6:6784976 n6:2950561 n6:1466119
n3:druhVysledku
n9:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
473126
n3:idVysledku
RIV/61989592:15310/06:00003236
n3:jazykVysledku
n12:eng
n3:klicovaSlova
Fenton reaction; Hydroxyl radical; Metal chelators; Spin-trapping; Thylakoid membranes
n3:klicoveSlovo
n8:Fenton%20reaction n8:Hydroxyl%20radical n8:Spin-trapping n8:Metal%20chelators n8:Thylakoid%20membranes
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[5A1FE2EA7427]
n3:nazevZdroje
Photosynthesis Research
n3:obor
n15:BO
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n11:1K04103
n3:rokUplatneniVysledku
n14:2006
n3:svazekPeriodika
88
n3:tvurceVysledku
Nauš, Jan Pospíšil, Pavel Šnyrychová, Iva
n3:zamer
n18:MSM6198959215
s:issn
0166-8595
s:numberOfPages
7
n16:organizacniJednotka
15310