Nitric oxide interacts with mitochondrial complex III producing antimycin-like effects
- Autores
- Iglesias, Dario Ezequiel; Bombicino, Silvina Sonia; Valdez, Laura Batriz; Boveris, Alberto Antonio
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The effect of NO between cytochromes b and c of the mitochondrial respiratory chain were studied using submitochondrial particles (SMP) from bovine heart and GSNO and SPER-NO as NO sources. Succinate-cytochrome c reductase (complex II-III) activity (222±4 nmol/min. mg protein) was inhibited by 51% in the presence of 500 μM GSNO and by 48% in the presence of 30 μM SPER-NO, in both cases at ~1.25 μM NO. Neither GSNO nor SPER-NO were able to inhibit succinate-Q reductase activity (complex II; 220±9 nmol/min. mg protein), showing that NO affects complex III. Complex II-III activity was decreased (36%) when SMP were incubated with l-arginine and mtNOS cofactors, indicating that this effect is also produced by endogenous NO. GSNO (500 μM) reduced cytochrome b562 by 71%, in an [O2] independent manner. Hyperbolic increases in O2 •- (up to 1.3±0.1 nmol/min. mg protein) and H2O2 (up to 0.64±0.05 nmol/min. mg protein) productions were observed with a maximal effect at 500 μM GSNO. The O2 •-/H2O2 ratio was 1.98 in accordance with the stoichiometry of the O2 •- disproportionation. Moreover, H2O2 production was increased by 72-74% when heart coupled mitochondria were exposed to 500 μM GSNO or 30 μM SPER-NO. SMP incubated in the presence of succinate showed an EPR signal (g=1.99) compatible with a stable semiquinone. This EPR signal was increased not only by antimycin but also by GSNO and SPER-NO. These signals were not modified under N2 atmosphere, indicating that they are not a consequence to the effect of NOx species on complex III area. These results show that NO interacts with ubiquinone-cytochrome b area producing antimycin-like effects. This behaviour comprises the inhibition of electron transfer, the interruption of the oxidation of cytochromes b, and the enhancement of [UQH•]ss which, in turn, leads to an increase in O2 •- and H2O2 mitochondrial production rates.
Fil: Iglesias, Dario Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Bioquímica y Medicina Molecular; Argentina
Fil: Bombicino, Silvina Sonia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Bioquímica y Medicina Molecular; Argentina
Fil: Valdez, Laura Batriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Bioquímica y Medicina Molecular; Argentina
Fil: Boveris, Alberto Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Bioquímica y Medicina Molecular; Argentina - Materia
-
Cytochrome Bc1 Complex
Electron Paramagnetic Resonance (Epr)
Hydrogen Peroxide
Nitric Oxide
S-Nitrosoglutathione (Gsno)
Spermine-Nonoate (Sper-No)
Superoxide Anion
Ubiquinone-Cytochrome B Area
Ubisemiquinone - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/38835
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Nitric oxide interacts with mitochondrial complex III producing antimycin-like effectsIglesias, Dario EzequielBombicino, Silvina SoniaValdez, Laura BatrizBoveris, Alberto AntonioCytochrome Bc1 ComplexElectron Paramagnetic Resonance (Epr)Hydrogen PeroxideNitric OxideS-Nitrosoglutathione (Gsno)Spermine-Nonoate (Sper-No)Superoxide AnionUbiquinone-Cytochrome B AreaUbisemiquinonehttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The effect of NO between cytochromes b and c of the mitochondrial respiratory chain were studied using submitochondrial particles (SMP) from bovine heart and GSNO and SPER-NO as NO sources. Succinate-cytochrome c reductase (complex II-III) activity (222±4 nmol/min. mg protein) was inhibited by 51% in the presence of 500 μM GSNO and by 48% in the presence of 30 μM SPER-NO, in both cases at ~1.25 μM NO. Neither GSNO nor SPER-NO were able to inhibit succinate-Q reductase activity (complex II; 220±9 nmol/min. mg protein), showing that NO affects complex III. Complex II-III activity was decreased (36%) when SMP were incubated with l-arginine and mtNOS cofactors, indicating that this effect is also produced by endogenous NO. GSNO (500 μM) reduced cytochrome b562 by 71%, in an [O2] independent manner. Hyperbolic increases in O2 •- (up to 1.3±0.1 nmol/min. mg protein) and H2O2 (up to 0.64±0.05 nmol/min. mg protein) productions were observed with a maximal effect at 500 μM GSNO. The O2 •-/H2O2 ratio was 1.98 in accordance with the stoichiometry of the O2 •- disproportionation. Moreover, H2O2 production was increased by 72-74% when heart coupled mitochondria were exposed to 500 μM GSNO or 30 μM SPER-NO. SMP incubated in the presence of succinate showed an EPR signal (g=1.99) compatible with a stable semiquinone. This EPR signal was increased not only by antimycin but also by GSNO and SPER-NO. These signals were not modified under N2 atmosphere, indicating that they are not a consequence to the effect of NOx species on complex III area. These results show that NO interacts with ubiquinone-cytochrome b area producing antimycin-like effects. This behaviour comprises the inhibition of electron transfer, the interruption of the oxidation of cytochromes b, and the enhancement of [UQH•]ss which, in turn, leads to an increase in O2 •- and H2O2 mitochondrial production rates.Fil: Iglesias, Dario Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Bioquímica y Medicina Molecular; ArgentinaFil: Bombicino, Silvina Sonia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Bioquímica y Medicina Molecular; ArgentinaFil: Valdez, Laura Batriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Bioquímica y Medicina Molecular; ArgentinaFil: Boveris, Alberto Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Bioquímica y Medicina Molecular; ArgentinaElsevier Science Inc2015-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/38835Iglesias, Dario Ezequiel; Bombicino, Silvina Sonia; Valdez, Laura Batriz; Boveris, Alberto Antonio; Nitric oxide interacts with mitochondrial complex III producing antimycin-like effects; Elsevier Science Inc; Free Radical Biology and Medicine; 89; 12-2015; 602-6130891-5849CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.freeradbiomed.2015.08.024info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0891584915005997info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:08:28Zoai:ri.conicet.gov.ar:11336/38835instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:08:28.406CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Nitric oxide interacts with mitochondrial complex III producing antimycin-like effects |
title |
Nitric oxide interacts with mitochondrial complex III producing antimycin-like effects |
spellingShingle |
Nitric oxide interacts with mitochondrial complex III producing antimycin-like effects Iglesias, Dario Ezequiel Cytochrome Bc1 Complex Electron Paramagnetic Resonance (Epr) Hydrogen Peroxide Nitric Oxide S-Nitrosoglutathione (Gsno) Spermine-Nonoate (Sper-No) Superoxide Anion Ubiquinone-Cytochrome B Area Ubisemiquinone |
title_short |
Nitric oxide interacts with mitochondrial complex III producing antimycin-like effects |
title_full |
Nitric oxide interacts with mitochondrial complex III producing antimycin-like effects |
title_fullStr |
Nitric oxide interacts with mitochondrial complex III producing antimycin-like effects |
title_full_unstemmed |
Nitric oxide interacts with mitochondrial complex III producing antimycin-like effects |
title_sort |
Nitric oxide interacts with mitochondrial complex III producing antimycin-like effects |
dc.creator.none.fl_str_mv |
Iglesias, Dario Ezequiel Bombicino, Silvina Sonia Valdez, Laura Batriz Boveris, Alberto Antonio |
author |
Iglesias, Dario Ezequiel |
author_facet |
Iglesias, Dario Ezequiel Bombicino, Silvina Sonia Valdez, Laura Batriz Boveris, Alberto Antonio |
author_role |
author |
author2 |
Bombicino, Silvina Sonia Valdez, Laura Batriz Boveris, Alberto Antonio |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Cytochrome Bc1 Complex Electron Paramagnetic Resonance (Epr) Hydrogen Peroxide Nitric Oxide S-Nitrosoglutathione (Gsno) Spermine-Nonoate (Sper-No) Superoxide Anion Ubiquinone-Cytochrome B Area Ubisemiquinone |
topic |
Cytochrome Bc1 Complex Electron Paramagnetic Resonance (Epr) Hydrogen Peroxide Nitric Oxide S-Nitrosoglutathione (Gsno) Spermine-Nonoate (Sper-No) Superoxide Anion Ubiquinone-Cytochrome B Area Ubisemiquinone |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The effect of NO between cytochromes b and c of the mitochondrial respiratory chain were studied using submitochondrial particles (SMP) from bovine heart and GSNO and SPER-NO as NO sources. Succinate-cytochrome c reductase (complex II-III) activity (222±4 nmol/min. mg protein) was inhibited by 51% in the presence of 500 μM GSNO and by 48% in the presence of 30 μM SPER-NO, in both cases at ~1.25 μM NO. Neither GSNO nor SPER-NO were able to inhibit succinate-Q reductase activity (complex II; 220±9 nmol/min. mg protein), showing that NO affects complex III. Complex II-III activity was decreased (36%) when SMP were incubated with l-arginine and mtNOS cofactors, indicating that this effect is also produced by endogenous NO. GSNO (500 μM) reduced cytochrome b562 by 71%, in an [O2] independent manner. Hyperbolic increases in O2 •- (up to 1.3±0.1 nmol/min. mg protein) and H2O2 (up to 0.64±0.05 nmol/min. mg protein) productions were observed with a maximal effect at 500 μM GSNO. The O2 •-/H2O2 ratio was 1.98 in accordance with the stoichiometry of the O2 •- disproportionation. Moreover, H2O2 production was increased by 72-74% when heart coupled mitochondria were exposed to 500 μM GSNO or 30 μM SPER-NO. SMP incubated in the presence of succinate showed an EPR signal (g=1.99) compatible with a stable semiquinone. This EPR signal was increased not only by antimycin but also by GSNO and SPER-NO. These signals were not modified under N2 atmosphere, indicating that they are not a consequence to the effect of NOx species on complex III area. These results show that NO interacts with ubiquinone-cytochrome b area producing antimycin-like effects. This behaviour comprises the inhibition of electron transfer, the interruption of the oxidation of cytochromes b, and the enhancement of [UQH•]ss which, in turn, leads to an increase in O2 •- and H2O2 mitochondrial production rates. Fil: Iglesias, Dario Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Bioquímica y Medicina Molecular; Argentina Fil: Bombicino, Silvina Sonia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Bioquímica y Medicina Molecular; Argentina Fil: Valdez, Laura Batriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Bioquímica y Medicina Molecular; Argentina Fil: Boveris, Alberto Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Bioquímica y Medicina Molecular. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Bioquímica y Medicina Molecular; Argentina |
description |
The effect of NO between cytochromes b and c of the mitochondrial respiratory chain were studied using submitochondrial particles (SMP) from bovine heart and GSNO and SPER-NO as NO sources. Succinate-cytochrome c reductase (complex II-III) activity (222±4 nmol/min. mg protein) was inhibited by 51% in the presence of 500 μM GSNO and by 48% in the presence of 30 μM SPER-NO, in both cases at ~1.25 μM NO. Neither GSNO nor SPER-NO were able to inhibit succinate-Q reductase activity (complex II; 220±9 nmol/min. mg protein), showing that NO affects complex III. Complex II-III activity was decreased (36%) when SMP were incubated with l-arginine and mtNOS cofactors, indicating that this effect is also produced by endogenous NO. GSNO (500 μM) reduced cytochrome b562 by 71%, in an [O2] independent manner. Hyperbolic increases in O2 •- (up to 1.3±0.1 nmol/min. mg protein) and H2O2 (up to 0.64±0.05 nmol/min. mg protein) productions were observed with a maximal effect at 500 μM GSNO. The O2 •-/H2O2 ratio was 1.98 in accordance with the stoichiometry of the O2 •- disproportionation. Moreover, H2O2 production was increased by 72-74% when heart coupled mitochondria were exposed to 500 μM GSNO or 30 μM SPER-NO. SMP incubated in the presence of succinate showed an EPR signal (g=1.99) compatible with a stable semiquinone. This EPR signal was increased not only by antimycin but also by GSNO and SPER-NO. These signals were not modified under N2 atmosphere, indicating that they are not a consequence to the effect of NOx species on complex III area. These results show that NO interacts with ubiquinone-cytochrome b area producing antimycin-like effects. This behaviour comprises the inhibition of electron transfer, the interruption of the oxidation of cytochromes b, and the enhancement of [UQH•]ss which, in turn, leads to an increase in O2 •- and H2O2 mitochondrial production rates. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-12 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/38835 Iglesias, Dario Ezequiel; Bombicino, Silvina Sonia; Valdez, Laura Batriz; Boveris, Alberto Antonio; Nitric oxide interacts with mitochondrial complex III producing antimycin-like effects; Elsevier Science Inc; Free Radical Biology and Medicine; 89; 12-2015; 602-613 0891-5849 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/38835 |
identifier_str_mv |
Iglesias, Dario Ezequiel; Bombicino, Silvina Sonia; Valdez, Laura Batriz; Boveris, Alberto Antonio; Nitric oxide interacts with mitochondrial complex III producing antimycin-like effects; Elsevier Science Inc; Free Radical Biology and Medicine; 89; 12-2015; 602-613 0891-5849 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.freeradbiomed.2015.08.024 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0891584915005997 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier Science Inc |
publisher.none.fl_str_mv |
Elsevier Science Inc |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613952420446208 |
score |
13.070432 |