Mechanisms in Lamb Endocrinology and Hormone Action

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Small Ruminants".

Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 3147

Special Issue Editors


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Guest Editor
Department of Animal Physiology and Endocrinology, University of Agriculture in Krakow, Al. Adama Mickiewicza 24/28, 30-059 Kraków, Poland
Interests: neuroendocrinology; stress; opioids; growth; development; metabolism; probiotics; sheep; animal models
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Guest Editor
Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
Interests: poultry science; chicken processing; poultry nutrition; poultry welfare; poultry physiology
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Special Issue Information

Dear Colleagues,

Sheep were one of the earliest animals domesticated for human use. Sheep and lamb farming are a key source of meat, milk, wool and important for the global livestock sector, and efforts are made to select the best breeds to improve production yields and performance. Lamb and sheep are an important biomedical model, and since the global analysis of gene expression in many tissues has provided tools for supporting functional annotation of sheep genes, scientists have developed a model transcriptome for ruminants and insight into gene, cell, and tissue function at many developmental stages. 

The growth and development of lamb as well as other physiological functions are regulated by the endocrine system; however, the mechanisms of hormones action are not fully understood. For these reasons, the new Special Issue shall focus on the development and validation of important endocrinal indications/parameters, the testing and refinements of existing indicators, and the assessment of their reliability and feasibility.

This Special Issue invites both reviews and research papers on all aspects of lamb endocrinology. The goal of the issue is to provide both interdisciplinary and global perspectives; the list below highlights some of the possible research topics of interest:

- Molecular mechanism of hormone action;

- Endogenous opioid peptides;

- Implications of hormonal regulation of stress response in lamb;

- Hormonal regulation of lamb metabolism;

- Endocrinology of feeding mechanisms;

- Gastrointestinal hormones;

- Hormonal regulation of growth;

- Endocrinology of photoperiod;

- Neuroendocrinology of pain sensation;

- Neuroimmunoendocrine interactions in lamb development.

Prof. Dr. Krystyna Pierzchala-Koziec
Prof. Dr. Colin Scanes
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • hormone action
  • lamb metabolism
  • neuroendocrinology
  • stress hormones
  • growth hormone
  • IGF-1
  • ghrelin
  • leptin
  • opioids
  • photoperiod

Published Papers (1 paper)

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Research

15 pages, 1499 KiB  
Article
The Effect of Photoperiodic Conditions on GnRH/LH Secretion in Ewes
by Kamila Kopycińska, Karolina Wojtulewicz, Andrzej Przemysław Herman and Dorota Tomaszewska-Zaremba
Animals 2022, 12(3), 283; https://doi.org/10.3390/ani12030283 - 24 Jan 2022
Cited by 2 | Viewed by 2393
Abstract
Secretion of gonadotropin releasing hormone (GnRH) and luteinizing hormone (LH) displays a circadian pattern. Data concerning differences in daily GnRH/LH secretion during different seasons in sheep are fragmentary. The aim of the study was to determine day/night differences in GnRH/LH secretion in the [...] Read more.
Secretion of gonadotropin releasing hormone (GnRH) and luteinizing hormone (LH) displays a circadian pattern. Data concerning differences in daily GnRH/LH secretion during different seasons in sheep are fragmentary. The aim of the study was to determine day/night differences in GnRH/LH secretion in the follicular phase and in the anestrous ewes. The studies were performed on Blackhead ewes (n = 24). Ewes from each season were divided into two groups of six animals (day and night group). The animals were euthanized 5 h after sunset or 5 h after sunrise and blood was taken to determine LH and melatonin concentrations. In the hypothalamus, the expression of GnRH and gonadotropin releasing hormone receptor (GnRHR) was determined. In the anterior pituitary, the expression of mRNA encoding subunit β of LH (LHβ) and GnRHR was assayed. Our study showed that GnRH/LH secretion is subject to diurnal and seasonal changes. The observed reduction in LH release, a few hours after the sunset, seems to be universal for both the anestrus and follicular phase, when the processes occurring at the hypothalamus are more equivocal. It could be concluded that the nocturnal suppression of LH secretion in follicular phase ewes may be a mechanism moving the LH surge to the early morning. Full article
(This article belongs to the Special Issue Mechanisms in Lamb Endocrinology and Hormone Action)
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