Discontinuous vs. continuous drinking of ethanol in peripubertal rats : effect on 24-hour pattern of hypophyseal-gonadal axis activity and anterior pituitary oxidative stress

Abstract: Aims. Discontinuous (weekend) consumption of alcohol is common in adolescents and young adults. This study therefore assesses, in peripubertal male rats, the effect of discontinuous as compared to chronic feeding of ethanol or control liquid diet. Methods. Animals received an ethanol l...

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Autores principales: Fernández Mateos, María P., Jiménez Ortega, Vanesa, Cano Barquilla, Pilar, Cardinali, Daniel Pedro, Esquifino, Ana I.
Formato: Artículo
Lenguaje:Inglés
Inglés
Publicado: Karger Publishers 2019
Materias:
ALCOHOLISMO
REPRODUCCION HUMANA
PROLACTINA
LIBIDO
STRESS
RITMO CIRCADIANO
Acceso en línea:https://repositorio.uca.edu.ar/handle/123456789/1662
Aporte de:
Repositorio Institucional de la Universidad Católica Argentina (UCA) de Universidad Católica Argentina
id I33-R139123456789-1662
record_format dspace
institution Universidad Católica Argentina
institution_str I-33
repository_str R-139
collection Repositorio Institucional de la Universidad Católica Argentina (UCA)
language Inglés
Inglés
topic ALCOHOLISMO
REPRODUCCION HUMANA
PROLACTINA
LIBIDO
STRESS
RITMO CIRCADIANO
spellingShingle ALCOHOLISMO
REPRODUCCION HUMANA
PROLACTINA
LIBIDO
STRESS
RITMO CIRCADIANO
Fernández Mateos, María P.
Jiménez Ortega, Vanesa
Cano Barquilla, Pilar
Cardinali, Daniel Pedro
Esquifino, Ana I.
Discontinuous vs. continuous drinking of ethanol in peripubertal rats : effect on 24-hour pattern of hypophyseal-gonadal axis activity and anterior pituitary oxidative stress
topic_facet ALCOHOLISMO
REPRODUCCION HUMANA
PROLACTINA
LIBIDO
STRESS
RITMO CIRCADIANO
description Abstract: Aims. Discontinuous (weekend) consumption of alcohol is common in adolescents and young adults. This study therefore assesses, in peripubertal male rats, the effect of discontinuous as compared to chronic feeding of ethanol or control liquid diet. Methods. Animals received an ethanol liquid diet (6.2 % wt/vol) starting on day 35 of life. Every week for 5 weeks, the discontinuous ethanol group received the ethanol diet for 3 consecutive days and the control liquid diet for 4 days. At the 5th week, 24 h after the last ethanol administration to the discontinuous ethanol treated animals, rats were killed at 4 h intervals beginning at 0900 h. Chronically administered rats received the ethanol diet until immediately before study. Results. Disrupted 24-h rhythmicity together with a significant nocturnal increase in plasma luteinizing hormone (LH), testosterone and prolactin (PRL) occurred in the discontinuous ethanol group. Plasma ethanol levels were undetectable at 24 h after the last ethanol treatment. In contrast, after chronic ethanol administration, plasma PRL was increased late in scotophase while LH and testosterone decreased; blood ethanol levels were 2-fold greater than those in discontinuously ethanoladministered rats killed immediately after ethanol withdrawal. Circulating testosterone positively correlated with LH levels in control rats only. Chronic administration of ethanol significantly augmented mean expression of pituitary nitric oxide synthase (NOS)-2, heme oxygenase (HO)-1, Per1 and Per2 genes and disrupted their diurnal rhythmicity. Decreased NOS-1 and NOS-2 expression during scotophase, together with suppression of the rhythm in Per1 and Per2 expression, were found in the discontinuous ethanol group. Conclusions. Abstinence after discontinuous drinking of alcohol in rats, as compared to chronic administration of ethanol, is accompanied by increases of plasma LH and testosterone, a greater PRL response and a less pronounced oxidative damage of the anterior pituitary.
format Artículo
author Fernández Mateos, María P.
Jiménez Ortega, Vanesa
Cano Barquilla, Pilar
Cardinali, Daniel Pedro
Esquifino, Ana I.
author_facet Fernández Mateos, María P.
Jiménez Ortega, Vanesa
Cano Barquilla, Pilar
Cardinali, Daniel Pedro
Esquifino, Ana I.
author_sort Fernández Mateos, María P.
title Discontinuous vs. continuous drinking of ethanol in peripubertal rats : effect on 24-hour pattern of hypophyseal-gonadal axis activity and anterior pituitary oxidative stress
title_short Discontinuous vs. continuous drinking of ethanol in peripubertal rats : effect on 24-hour pattern of hypophyseal-gonadal axis activity and anterior pituitary oxidative stress
title_full Discontinuous vs. continuous drinking of ethanol in peripubertal rats : effect on 24-hour pattern of hypophyseal-gonadal axis activity and anterior pituitary oxidative stress
title_fullStr Discontinuous vs. continuous drinking of ethanol in peripubertal rats : effect on 24-hour pattern of hypophyseal-gonadal axis activity and anterior pituitary oxidative stress
title_full_unstemmed Discontinuous vs. continuous drinking of ethanol in peripubertal rats : effect on 24-hour pattern of hypophyseal-gonadal axis activity and anterior pituitary oxidative stress
title_sort discontinuous vs. continuous drinking of ethanol in peripubertal rats : effect on 24-hour pattern of hypophyseal-gonadal axis activity and anterior pituitary oxidative stress
publisher Karger Publishers
publishDate 2019
url https://repositorio.uca.edu.ar/handle/123456789/1662
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