Effect of fasting on Δ5 desaturation activity in rat liver microsomes and HTC cells

Autores
Tacconi de Alaniz, María Josefa; Tacconi de Gómez Dumm, Irma Nelva; Brenner, Rodolfo Roberto
Año de publicación
1980
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The effect of fasting on Δ5 desaturation activity in Minimal Deviation Hepatoma 7288c (HTC) cells and in rat liver microsomes was studied. When HTC cells were incubated in the absence of carbon sources in the medium (fasted cells) the conversion of [1-14C] eicosa-8,11,14-trienoic acid to arachidonic acid increased significantly compared to those cells incubated in complete medium (fed cells). This effect was also shown in rat liver microsomes of rats fasted for 12, 24 and 48 hr. Fasting produced a decrease of the amount of ethanolamine fraction in HTC cells together with a significant increase in the specific activity of the same fraction. Fasting also modified the fatty acid composition of HTC cells and rat liver microsomes. There was observed a relative increase of 18:2ω6 acid. The importance of the difference in fatty acid and lipid composition among fasted and fed HTC cells and rat liver microsomes on Δ5 desaturation activity was discussed.
Facultad de Ciencias Médicas
Consejo Nacional de Investigaciones Científicas y Técnicas
Materia
Ciencias Médicas
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/143730

id SEDICI_0884af9b319d3a91820835af6996dd4b
oai_identifier_str oai:sedici.unlp.edu.ar:10915/143730
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Effect of fasting on Δ5 desaturation activity in rat liver microsomes and HTC cellsTacconi de Alaniz, María JosefaTacconi de Gómez Dumm, Irma NelvaBrenner, Rodolfo RobertoCiencias MédicasThe effect of fasting on Δ5 desaturation activity in Minimal Deviation Hepatoma 7288c (HTC) cells and in rat liver microsomes was studied. When HTC cells were incubated in the absence of carbon sources in the medium (fasted cells) the conversion of [1-14C] eicosa-8,11,14-trienoic acid to arachidonic acid increased significantly compared to those cells incubated in complete medium (fed cells). This effect was also shown in rat liver microsomes of rats fasted for 12, 24 and 48 hr. Fasting produced a decrease of the amount of ethanolamine fraction in HTC cells together with a significant increase in the specific activity of the same fraction. Fasting also modified the fatty acid composition of HTC cells and rat liver microsomes. There was observed a relative increase of 18:2ω6 acid. The importance of the difference in fatty acid and lipid composition among fasted and fed HTC cells and rat liver microsomes on Δ5 desaturation activity was discussed.Facultad de Ciencias MédicasConsejo Nacional de Investigaciones Científicas y Técnicas1980-12-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf165-170http://sedici.unlp.edu.ar/handle/10915/143730enginfo:eu-repo/semantics/altIdentifier/issn/0300-8177info:eu-repo/semantics/altIdentifier/issn/1573-4919info:eu-repo/semantics/altIdentifier/doi/10.1007/bf00225290info:eu-repo/semantics/altIdentifier/pmid/7464829info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:32:17Zoai:sedici.unlp.edu.ar:10915/143730Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:32:18.035SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Effect of fasting on Δ5 desaturation activity in rat liver microsomes and HTC cells
title Effect of fasting on Δ5 desaturation activity in rat liver microsomes and HTC cells
spellingShingle Effect of fasting on Δ5 desaturation activity in rat liver microsomes and HTC cells
Tacconi de Alaniz, María Josefa
Ciencias Médicas
title_short Effect of fasting on Δ5 desaturation activity in rat liver microsomes and HTC cells
title_full Effect of fasting on Δ5 desaturation activity in rat liver microsomes and HTC cells
title_fullStr Effect of fasting on Δ5 desaturation activity in rat liver microsomes and HTC cells
title_full_unstemmed Effect of fasting on Δ5 desaturation activity in rat liver microsomes and HTC cells
title_sort Effect of fasting on Δ5 desaturation activity in rat liver microsomes and HTC cells
dc.creator.none.fl_str_mv Tacconi de Alaniz, María Josefa
Tacconi de Gómez Dumm, Irma Nelva
Brenner, Rodolfo Roberto
author Tacconi de Alaniz, María Josefa
author_facet Tacconi de Alaniz, María Josefa
Tacconi de Gómez Dumm, Irma Nelva
Brenner, Rodolfo Roberto
author_role author
author2 Tacconi de Gómez Dumm, Irma Nelva
Brenner, Rodolfo Roberto
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Médicas
topic Ciencias Médicas
dc.description.none.fl_txt_mv The effect of fasting on Δ5 desaturation activity in Minimal Deviation Hepatoma 7288c (HTC) cells and in rat liver microsomes was studied. When HTC cells were incubated in the absence of carbon sources in the medium (fasted cells) the conversion of [1-14C] eicosa-8,11,14-trienoic acid to arachidonic acid increased significantly compared to those cells incubated in complete medium (fed cells). This effect was also shown in rat liver microsomes of rats fasted for 12, 24 and 48 hr. Fasting produced a decrease of the amount of ethanolamine fraction in HTC cells together with a significant increase in the specific activity of the same fraction. Fasting also modified the fatty acid composition of HTC cells and rat liver microsomes. There was observed a relative increase of 18:2ω6 acid. The importance of the difference in fatty acid and lipid composition among fasted and fed HTC cells and rat liver microsomes on Δ5 desaturation activity was discussed.
Facultad de Ciencias Médicas
Consejo Nacional de Investigaciones Científicas y Técnicas
description The effect of fasting on Δ5 desaturation activity in Minimal Deviation Hepatoma 7288c (HTC) cells and in rat liver microsomes was studied. When HTC cells were incubated in the absence of carbon sources in the medium (fasted cells) the conversion of [1-14C] eicosa-8,11,14-trienoic acid to arachidonic acid increased significantly compared to those cells incubated in complete medium (fed cells). This effect was also shown in rat liver microsomes of rats fasted for 12, 24 and 48 hr. Fasting produced a decrease of the amount of ethanolamine fraction in HTC cells together with a significant increase in the specific activity of the same fraction. Fasting also modified the fatty acid composition of HTC cells and rat liver microsomes. There was observed a relative increase of 18:2ω6 acid. The importance of the difference in fatty acid and lipid composition among fasted and fed HTC cells and rat liver microsomes on Δ5 desaturation activity was discussed.
publishDate 1980
dc.date.none.fl_str_mv 1980-12-16
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/143730
url http://sedici.unlp.edu.ar/handle/10915/143730
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0300-8177
info:eu-repo/semantics/altIdentifier/issn/1573-4919
info:eu-repo/semantics/altIdentifier/doi/10.1007/bf00225290
info:eu-repo/semantics/altIdentifier/pmid/7464829
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
165-170
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
_version_ 1844616202417078272
score 13.070432