The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1)

Autores
Fernandez Villamil, Silvia Hebe; Carrizo, Patricia H.; Di Rosso, María Emilia; Molina Portela, María P; Dubin, Marta
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A β-lapachone analogue (3,4-dihydro-2,2-dimethyl-9-chloro-2H-naphtho[1,2b]pyran-5,6-dione) (9-chloro β-lapachone), named CGQ, with antitumoral, antiviral and antitrypanocidal activities was assayed for cytotoxic effects on isolated rat hepatocytes. The incubation of hepatocytes with this o-naphthoquinone showed (a) decreased adenylate energy charge, as a result of a decrease in ATP, and an increase in AMP levels; (b) increased NADP+ content, with a concomitant decrease of NADPH, NADH and NAD+ content; (c) decreased GSH content, accompanied by an increase in GSSG formation; (d) stimulated oxygen uptake as well as increased superoxide anion production and hydrogen peroxide formation; (e) inhibited lipid peroxidation; (f) hepatocyte viability was not reduced unless the NQO1 inhibitor dicoumarol was present. We hypothesize that the cytotoxicity of CGQ in dicoumarol-treated hepatocytes was the result of inhibition of the NQO1 detoxification pathway, thus allowing more quinone to be metabolized towards the one-electron pathway to form reactive semiquinones and/or reactive oxygen species. The results obtained indicate a protective role of NQO1 in preventing CGQ cytotoxicity in isolated rat hepatocytes.
Fil: Fernandez Villamil, Silvia Hebe. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; Argentina
Fil: Carrizo, Patricia H.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Centro de Estudios Farmacológicos y Botánicos. Universidad de Buenos Aires. Facultad de Medicina. Centro de Estudios Farmacológicos y Botánicos; Argentina
Fil: Di Rosso, María Emilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Centro de Estudios Farmacológicos y Botánicos. Universidad de Buenos Aires. Facultad de Medicina. Centro de Estudios Farmacológicos y Botánicos; Argentina
Fil: Molina Portela, María P. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Centro de Estudios Farmacológicos y Botánicos. Universidad de Buenos Aires. Facultad de Medicina. Centro de Estudios Farmacológicos y Botánicos; Argentina
Fil: Dubin, Marta. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Centro de Estudios Farmacológicos y Botánicos. Universidad de Buenos Aires. Facultad de Medicina. Centro de Estudios Farmacológicos y Botánicos; Argentina
Materia
O-Naphthoquinones
Oxidative Stress
Nqo1
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/20260
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/20260
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1)Fernandez Villamil, Silvia HebeCarrizo, Patricia H.Di Rosso, María EmiliaMolina Portela, María PDubin, MartaO-NaphthoquinonesOxidative StressNqo1https://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1A β-lapachone analogue (3,4-dihydro-2,2-dimethyl-9-chloro-2H-naphtho[1,2b]pyran-5,6-dione) (9-chloro β-lapachone), named CGQ, with antitumoral, antiviral and antitrypanocidal activities was assayed for cytotoxic effects on isolated rat hepatocytes. The incubation of hepatocytes with this o-naphthoquinone showed (a) decreased adenylate energy charge, as a result of a decrease in ATP, and an increase in AMP levels; (b) increased NADP+ content, with a concomitant decrease of NADPH, NADH and NAD+ content; (c) decreased GSH content, accompanied by an increase in GSSG formation; (d) stimulated oxygen uptake as well as increased superoxide anion production and hydrogen peroxide formation; (e) inhibited lipid peroxidation; (f) hepatocyte viability was not reduced unless the NQO1 inhibitor dicoumarol was present. We hypothesize that the cytotoxicity of CGQ in dicoumarol-treated hepatocytes was the result of inhibition of the NQO1 detoxification pathway, thus allowing more quinone to be metabolized towards the one-electron pathway to form reactive semiquinones and/or reactive oxygen species. The results obtained indicate a protective role of NQO1 in preventing CGQ cytotoxicity in isolated rat hepatocytes.Fil: Fernandez Villamil, Silvia Hebe. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; ArgentinaFil: Carrizo, Patricia H.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Centro de Estudios Farmacológicos y Botánicos. Universidad de Buenos Aires. Facultad de Medicina. Centro de Estudios Farmacológicos y Botánicos; ArgentinaFil: Di Rosso, María Emilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Centro de Estudios Farmacológicos y Botánicos. Universidad de Buenos Aires. Facultad de Medicina. Centro de Estudios Farmacológicos y Botánicos; ArgentinaFil: Molina Portela, María P. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Centro de Estudios Farmacológicos y Botánicos. Universidad de Buenos Aires. Facultad de Medicina. Centro de Estudios Farmacológicos y Botánicos; ArgentinaFil: Dubin, Marta. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Centro de Estudios Farmacológicos y Botánicos. Universidad de Buenos Aires. Facultad de Medicina. Centro de Estudios Farmacológicos y Botánicos; ArgentinaElsevier Ireland2012-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/20260Fernandez Villamil, Silvia Hebe; Carrizo, Patricia H.; Di Rosso, María Emilia; Molina Portela, María P; Dubin, Marta; The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1); Elsevier Ireland; Chemico-biological Interactions; 200; 2-3; 12-2012; 84-910009-2797CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.cbi.2012.09.011info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0009279712001858info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-05T09:38:29Zoai:ri.conicet.gov.ar:11336/20260instacron: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:34982025-11-05 09:38:29.755CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1)
title The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1)
spellingShingle The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1)
Fernandez Villamil, Silvia Hebe
O-Naphthoquinones
Oxidative Stress
Nqo1
title_short The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1)
title_full The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1)
title_fullStr The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1)
title_full_unstemmed The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1)
title_sort The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1)
dc.creator.none.fl_str_mv Fernandez Villamil, Silvia Hebe
Carrizo, Patricia H.
Di Rosso, María Emilia
Molina Portela, María P
Dubin, Marta
author Fernandez Villamil, Silvia Hebe
author_facet Fernandez Villamil, Silvia Hebe
Carrizo, Patricia H.
Di Rosso, María Emilia
Molina Portela, María P
Dubin, Marta
author_role author
author2 Carrizo, Patricia H.
Di Rosso, María Emilia
Molina Portela, María P
Dubin, Marta
author2_role author
author
author
author
dc.subject.none.fl_str_mv O-Naphthoquinones
Oxidative Stress
Nqo1
topic O-Naphthoquinones
Oxidative Stress
Nqo1
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A β-lapachone analogue (3,4-dihydro-2,2-dimethyl-9-chloro-2H-naphtho[1,2b]pyran-5,6-dione) (9-chloro β-lapachone), named CGQ, with antitumoral, antiviral and antitrypanocidal activities was assayed for cytotoxic effects on isolated rat hepatocytes. The incubation of hepatocytes with this o-naphthoquinone showed (a) decreased adenylate energy charge, as a result of a decrease in ATP, and an increase in AMP levels; (b) increased NADP+ content, with a concomitant decrease of NADPH, NADH and NAD+ content; (c) decreased GSH content, accompanied by an increase in GSSG formation; (d) stimulated oxygen uptake as well as increased superoxide anion production and hydrogen peroxide formation; (e) inhibited lipid peroxidation; (f) hepatocyte viability was not reduced unless the NQO1 inhibitor dicoumarol was present. We hypothesize that the cytotoxicity of CGQ in dicoumarol-treated hepatocytes was the result of inhibition of the NQO1 detoxification pathway, thus allowing more quinone to be metabolized towards the one-electron pathway to form reactive semiquinones and/or reactive oxygen species. The results obtained indicate a protective role of NQO1 in preventing CGQ cytotoxicity in isolated rat hepatocytes.
Fil: Fernandez Villamil, Silvia Hebe. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; Argentina
Fil: Carrizo, Patricia H.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Centro de Estudios Farmacológicos y Botánicos. Universidad de Buenos Aires. Facultad de Medicina. Centro de Estudios Farmacológicos y Botánicos; Argentina
Fil: Di Rosso, María Emilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Centro de Estudios Farmacológicos y Botánicos. Universidad de Buenos Aires. Facultad de Medicina. Centro de Estudios Farmacológicos y Botánicos; Argentina
Fil: Molina Portela, María P. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Centro de Estudios Farmacológicos y Botánicos. Universidad de Buenos Aires. Facultad de Medicina. Centro de Estudios Farmacológicos y Botánicos; Argentina
Fil: Dubin, Marta. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Centro de Estudios Farmacológicos y Botánicos. Universidad de Buenos Aires. Facultad de Medicina. Centro de Estudios Farmacológicos y Botánicos; Argentina
description A β-lapachone analogue (3,4-dihydro-2,2-dimethyl-9-chloro-2H-naphtho[1,2b]pyran-5,6-dione) (9-chloro β-lapachone), named CGQ, with antitumoral, antiviral and antitrypanocidal activities was assayed for cytotoxic effects on isolated rat hepatocytes. The incubation of hepatocytes with this o-naphthoquinone showed (a) decreased adenylate energy charge, as a result of a decrease in ATP, and an increase in AMP levels; (b) increased NADP+ content, with a concomitant decrease of NADPH, NADH and NAD+ content; (c) decreased GSH content, accompanied by an increase in GSSG formation; (d) stimulated oxygen uptake as well as increased superoxide anion production and hydrogen peroxide formation; (e) inhibited lipid peroxidation; (f) hepatocyte viability was not reduced unless the NQO1 inhibitor dicoumarol was present. We hypothesize that the cytotoxicity of CGQ in dicoumarol-treated hepatocytes was the result of inhibition of the NQO1 detoxification pathway, thus allowing more quinone to be metabolized towards the one-electron pathway to form reactive semiquinones and/or reactive oxygen species. The results obtained indicate a protective role of NQO1 in preventing CGQ cytotoxicity in isolated rat hepatocytes.
publishDate 2012
dc.date.none.fl_str_mv 2012-12
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/11336/20260
Fernandez Villamil, Silvia Hebe; Carrizo, Patricia H.; Di Rosso, María Emilia; Molina Portela, María P; Dubin, Marta; The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1); Elsevier Ireland; Chemico-biological Interactions; 200; 2-3; 12-2012; 84-91
0009-2797
CONICET Digital
CONICET
url http://hdl.handle.net/11336/20260
identifier_str_mv Fernandez Villamil, Silvia Hebe; Carrizo, Patricia H.; Di Rosso, María Emilia; Molina Portela, María P; Dubin, Marta; The metabolism of 9-chloro-β-lapachone and its effects in isolated hepatocytes. The involvement of NAD(P)H:quinone oxidoreductase 1 (NQO1); Elsevier Ireland; Chemico-biological Interactions; 200; 2-3; 12-2012; 84-91
0009-2797
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.cbi.2012.09.011
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0009279712001858
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Ireland
publisher.none.fl_str_mv Elsevier Ireland
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
_version_ 1847976882165776384
score 13.087074

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