Seasonal variations of gonadotropins and prolactin in the laboratory rat. Role of maternal pineal gland

Title:

Seasonal variations of gonadotropins and prolactin in the laboratory rat. Role of maternal pineal gland

Creator:

Vázquez, N., Díaz, E., Fernández, C., Jiménez, V., Esquifino, A., and Díaz, Beatrice López

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:f0c16ec1-958c-4d3a-8d83-09dc7a09b7f2
uuid:f0c16ec1-958c-4d3a-8d83-09dc7a09b7f2
issn:0862-8408

Subject:

Fyziologie člověka a srovnávací fyziologie, fyziologie, hormony hypofýzy, laboratorní zvířata, physiology, pituitary hormones, laboratory animals, gonadotropiny, prolaktin, maternal pineal gland, seasonal variations, gonadotropins, prolactin, 14, and 612

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

The laboratory rat, a non-photoperiodic rodent, exhibits seasonal fluctuations of melatonin. Melatonin has been found to be readily transferred from the maternal to the fetal circulation. No data exist on the possible influence of maternal pineal gland upon seasonal variations of the offspring. The aim of the present study was to asses the influence of the maternal melatonin rhythm on the offspring postnatal development of the reproductive hormones LH, FSH and prolactin. Male offspring from control, pinealectomized (PIN-X) and PIN-X + melatonin (PIN-X+MEL) mother Wistar rats were studied at 21, 31, and 60 days of age. Seasonal age-dependent variations were found for all hormones studied in control offspring but PIN-X offspring showed a tendency to have reduced duration or altered seasonal variations. Maternal melatonin treatment to PIN-X mothers partially restored the effect of pinealectomy. The chronological study of LH, FSH, and prolactin in PIN-X offspring also showed an altered pattern as compared to control-offspring. Melatonin treatment to the mothers partially restored the developmental pattern of reproductive hormones. Results of this study indicate that maternal pineal gland of the laboratory rat is involved in the seasonal postnatal development variations of reproductive hormones of the offspring., N. Vásquez, E. Díaz, C. Fernández, V. Jiménez, A. Esquifino, B. Díaz., and Obsahuje bibliografii a bibliografické odkazy

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 2007 Volume:56 | Number:1

Harvested from:

CDK

Metadata only:

false