The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewes

Zarazaga Garcés, Luis Ángel; Malpaux, B.; Chemineau, Phileppe

The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewes

An experiment was designed to study if, in the same animals, characteristics of the plasma melatonin rhythm vary during pregnancy in ewes. Thirteen Ile-de-France ewes were maintained in natural photoperiod and measurements of the characteristics of the rhythm of melatonin secretion were determined d...

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Detalles Bibliográficos
Autores:	Zarazaga Garcés, Luis Ángel, Malpaux, B., Chemineau, Phileppe
Tipo de recurso:	artículo
Fecha de publicación:	1996
País:	España
Institución:	Universidad de Huelva (UHU)
Repositorio:	Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:	inglés
OAI Identifier:	oai:ariasmontano.uhu.es:10272/6389
Acceso en línea:	http://hdl.handle.net/10272/6389
Access Level:	acceso abierto
Palabra clave:	Melatonin Pregnancy Secretion Ewe Mélatonine Gestation Sécrétion Brebis

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spelling	The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewesLes caractéristiques du rythme de sécrétion de mélatonine ne sont pas modifiées pendant la gestation chez la brebisZarazaga Garcés, Luis ÁngelMalpaux, B.Chemineau, PhileppeMelatoninPregnancySecretionEweMélatonineGestationSécrétionBrebisAn experiment was designed to study if, in the same animals, characteristics of the plasma melatonin rhythm vary during pregnancy in ewes. Thirteen Ile-de-France ewes were maintained in natural photoperiod and measurements of the characteristics of the rhythm of melatonin secretion were determined during one estrous cycle and then during pregnancy. Duration and mean plasma concentrations of the nocturnal melatonin elevation were measured at four stages of pregnancy. Melatonin concentrations during the elevation were not significantly affected by the stage of the estrous cycle (mean ± SEM: 227.8 ± 34.9, 263.2 ± 24.2 and 232.4 ± 27.1 pg/mL for follicular phase, early luteal phase and late luteal phase, respectively), or by the stage of pregnancy (292.8 ± 22.2, 268.7 ± 21.7, 267.4 ± 27.9 and 258.3 ± 23.5 pg/mL for first, second, third and fourth month of pregnancy, respectively). A strong individual effect was detected (P < 0.01) for melatonin concentrations during elevation (range: 119.2 ± 11.8 to 396.6 ± 26.0 pg/mL of plasma). A highly significant correlation coefficient was observed within individuals for night melatonin concentrations between the different physiological stages. It was concluded that melatonin secretion is unaffected by the stage of pregnancy.Les caractéristiques du rythme de sécrétion de la mélatonine ont été étudiées pendant la gestation en répétant les mesures sur les mêmes animaux. Treize brebis, soumises à une photopériode naturelle, ont été utilisées et les caractéristiques du rythme de sécrétion de la mélatonine ont été mesurées pendant un cycle oestrien et pendant la gestation. La durée de sécrétion et les concentrations moyennes de mélatonine pendant l’élévation nocturne ont été étudiées à quatre moments différents de la gestation. Les concentrations nocturnes de mélatonine ne sont pas différentes entre les trois stades du cycle étudiés (moyenne ± SEM ; 277,8 ± 34,9 ; 263,2 ± 24,2 et 232,4 ± 27,1 pg/mL pour la phase folliculaire, le début et la fin de la phase lutéale, respectivement), ou les quatre stades de gestation étudiés (292,8 ± 22,2 ; 268,7 ± 21,7 ; 267,4 ± 27,9 et 258,3 ± 23,5 pg/mL pour le premier, deuxième, troisième et quatrième mois de gestation, respectivement). Une variabilité interindividuelle très importante a été observée (p < 0,01) pour les concentrations de mélatonine pendant la nuit (écart de 119,2 ± 11,8 à 396,6 ± 26,0 pg/mL de plasma). Un coefficient de corrélation très élevé intra-individus a été observé pour les concentrations de mélatonine entre les différents états physiologiques. Cette étude indique que la sécrétion de mélatonine n’est pas modifiée par la gestation.Institut National de la Recherche Agronomique (INRA)19961996-01-0119961996-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10272/6389reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/63892026-06-02T14:58:11Z
dc.title.none.fl_str_mv	The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewes Les caractéristiques du rythme de sécrétion de mélatonine ne sont pas modifiées pendant la gestation chez la brebis
title	The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewes
spellingShingle	The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewes Zarazaga Garcés, Luis Ángel Melatonin Pregnancy Secretion Ewe Mélatonine Gestation Sécrétion Brebis
title_short	The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewes
title_full	The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewes
title_fullStr	The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewes
title_full_unstemmed	The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewes
title_sort	The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewes
dc.creator.none.fl_str_mv	Zarazaga Garcés, Luis Ángel Malpaux, B. Chemineau, Phileppe
author	Zarazaga Garcés, Luis Ángel
author_facet	Zarazaga Garcés, Luis Ángel Malpaux, B. Chemineau, Phileppe
author_role	author
author2	Malpaux, B. Chemineau, Phileppe
author2_role	author author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv	Melatonin Pregnancy Secretion Ewe Mélatonine Gestation Sécrétion Brebis
topic	Melatonin Pregnancy Secretion Ewe Mélatonine Gestation Sécrétion Brebis
description	An experiment was designed to study if, in the same animals, characteristics of the plasma melatonin rhythm vary during pregnancy in ewes. Thirteen Ile-de-France ewes were maintained in natural photoperiod and measurements of the characteristics of the rhythm of melatonin secretion were determined during one estrous cycle and then during pregnancy. Duration and mean plasma concentrations of the nocturnal melatonin elevation were measured at four stages of pregnancy. Melatonin concentrations during the elevation were not significantly affected by the stage of the estrous cycle (mean ± SEM: 227.8 ± 34.9, 263.2 ± 24.2 and 232.4 ± 27.1 pg/mL for follicular phase, early luteal phase and late luteal phase, respectively), or by the stage of pregnancy (292.8 ± 22.2, 268.7 ± 21.7, 267.4 ± 27.9 and 258.3 ± 23.5 pg/mL for first, second, third and fourth month of pregnancy, respectively). A strong individual effect was detected (P < 0.01) for melatonin concentrations during elevation (range: 119.2 ± 11.8 to 396.6 ± 26.0 pg/mL of plasma). A highly significant correlation coefficient was observed within individuals for night melatonin concentrations between the different physiological stages. It was concluded that melatonin secretion is unaffected by the stage of pregnancy.
publishDate	1996
dc.date.none.fl_str_mv	1996 1996-01-01 1996 1996-01-01
dc.type.none.fl_str_mv	journal article http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv	info:eu-repo/semantics/article
format	article
dc.identifier.none.fl_str_mv	http://hdl.handle.net/10272/6389
url	http://hdl.handle.net/10272/6389
dc.language.none.fl_str_mv	Inglés eng
language_invalid_str_mv	Inglés
language	eng
dc.rights.none.fl_str_mv	open access http://purl.org/coar/access_right/c_abf2 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv	info:eu-repo/semantics/openAccess
rights_invalid_str_mv	open access http://purl.org/coar/access_right/c_abf2 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv	openAccess
dc.format.none.fl_str_mv	application/pdf
dc.publisher.none.fl_str_mv	Institut National de la Recherche Agronomique (INRA)
publisher.none.fl_str_mv	Institut National de la Recherche Agronomique (INRA)
dc.source.none.fl_str_mv	reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva instname:Universidad de Huelva (UHU)
instname_str	Universidad de Huelva (UHU)
reponame_str	Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection	Arias Montano. Repositorio Institucional de la Universidad de Huelva
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score	15,812429

The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewes

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