Research output: Contribution to journal › Article › peer-review
Effective inhibition of copper-catalyzed production of hydroxyl radicals by deferiprone. / Timoshnikov, V. A.; Kobzeva, T.; Selyutina, O. Y. et al.
In: Journal of Biological Inorganic Chemistry, Vol. 24, No. 3, 05.2019, p. 331-341.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Effective inhibition of copper-catalyzed production of hydroxyl radicals by deferiprone
AU - Timoshnikov, V. A.
AU - Kobzeva, T.
AU - Selyutina, O. Y.
AU - Polyakov, N. E.
AU - Kontoghiorghes, G. J.
PY - 2019/5
Y1 - 2019/5
N2 - Copper ions can catalyze the production of free oxygen radicals (•OH and •OOH) similar to iron ions. The capacity to initiate oxidative damage is most commonly attributed to Cu-induced toxicity in copper-related diseases where there is an increase in copper levels and also when Cu homeostasis and regulation are disrupted. An antioxidant/chelator inhibiting Cu-induced oxidative damage could play a significant role in the treatment of such Cu-related diseases. Deferiprone has high affinity for copper binding and can be considered for the potential treatment of copper toxicity and overloading conditions, such as Wilson’s disease. In the present study, the ability of deferiprone to inhibit the production of hydroxyl radicals catalyzed by copper ions was elucidated using an Electron Paramagnetic Resonance (EPR) spin trapping technique. The values of g-factors and hyperfine splitting constants were calculated for Cu(II)-deferiprone 1:1 complex: (a = 58.5 G, g = 2.1667) and 1:2 complex: (a = 73.0 G, g = 2.1378). The TMIO spin trap (2,2,4-trimethyl-2H-imidazole-1-oxide) was used for the detection of free radicals formed in Fenton-like copper-catalyzed reactions. It was demonstrated that the interaction of deferiprone with Cu 2+ ions completely inhibited hydroxyl radical (•OH) production in the presence of hydrogen peroxide. It was found also that deferiprone inhibits Cu-induced oxidation of linoleic acid in micellar solution. In addition to existing data for water solutions, the affinity of deferiprone for copper binding in non-aqueous environment has been elucidated.
AB - Copper ions can catalyze the production of free oxygen radicals (•OH and •OOH) similar to iron ions. The capacity to initiate oxidative damage is most commonly attributed to Cu-induced toxicity in copper-related diseases where there is an increase in copper levels and also when Cu homeostasis and regulation are disrupted. An antioxidant/chelator inhibiting Cu-induced oxidative damage could play a significant role in the treatment of such Cu-related diseases. Deferiprone has high affinity for copper binding and can be considered for the potential treatment of copper toxicity and overloading conditions, such as Wilson’s disease. In the present study, the ability of deferiprone to inhibit the production of hydroxyl radicals catalyzed by copper ions was elucidated using an Electron Paramagnetic Resonance (EPR) spin trapping technique. The values of g-factors and hyperfine splitting constants were calculated for Cu(II)-deferiprone 1:1 complex: (a = 58.5 G, g = 2.1667) and 1:2 complex: (a = 73.0 G, g = 2.1378). The TMIO spin trap (2,2,4-trimethyl-2H-imidazole-1-oxide) was used for the detection of free radicals formed in Fenton-like copper-catalyzed reactions. It was demonstrated that the interaction of deferiprone with Cu 2+ ions completely inhibited hydroxyl radical (•OH) production in the presence of hydrogen peroxide. It was found also that deferiprone inhibits Cu-induced oxidation of linoleic acid in micellar solution. In addition to existing data for water solutions, the affinity of deferiprone for copper binding in non-aqueous environment has been elucidated.
KW - Copper chelation
KW - Copper toxicity
KW - Deferiprone
KW - EPR
KW - Hydroxyl radical
KW - ENZYME-ACTIVITIES
KW - LIPID-PEROXIDATION
KW - ANTIOXIDANTS
KW - COMPLEXES
KW - CAROTENOIDS
KW - IRON OVERLOAD
KW - DISEASE
KW - HYDROGEN-PEROXIDE
KW - COPPER(II)-INDUCED OXIDATIVE STRESS
UR - http://www.scopus.com/inward/record.url?scp=85062959038&partnerID=8YFLogxK
U2 - 10.1007/s00775-019-01650-9
DO - 10.1007/s00775-019-01650-9
M3 - Article
C2 - 30868263
AN - SCOPUS:85062959038
VL - 24
SP - 331
EP - 341
JO - Journal of Biological Inorganic Chemistry
JF - Journal of Biological Inorganic Chemistry
SN - 0949-8257
IS - 3
ER -
ID: 18864034