| Effects of gestation and lactation on vitamin D receptor amounts in goats and sheep. | |
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MedLine Citation:
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PMID: 16797913 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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During gestation and lactation, an increased demand for calcium (Ca) due to the development of fetal skeleton and excretion via milk is observed. The higher need for Ca is met by an augmented mobilisation of Ca from bones and by an increased absorption from the intestines. The main influence on this physiological process of active absorption has Vitamin D, acting through Vitamin D receptors (VDR) located in the mucosal wall of the intestines, thus increasing Ca absorption. As a consequence of inadequate Ca absorption, metabolic diseases like milk fever can develop. In this study immunohistochemical procedures were applied to colon mucosa biopsies of pregnant and lactating goats and sheep, to study the effect of late gestation, parturition and lactation on VDR amount. Colon mucosa biopsies were collected 2 weeks before parturition, 1 and 4 weeks post partum (pp), 2, 3, 4, and 5 months pp from 11 dairy goats and 11 sheep. Immunohistochemistry was performed employing a biotinylated monoclonal rat anti-VDR antibody and streptavidin peroxidase techniques. Nuclei and cytoplasm of enterocytes stained positively for VDRs. Strongest immunoreactions were observed in intermediate and superficial glandular cells. The biopsy samples taken during early lactation revealed a lower immunoreaction for VDR compared with samples taken during later stages of lactation. In conclusion, immunochemistry and biopsy technology are useful tools to assess changes in VDR expression in relation to varying demands for Ca in the process of a reproductive cycle. These results show that in dairy goats and sheep, an influence of gestation and lactation on VDR is obvious. |
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Authors:
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A Liesegang; K Riner; A Boos |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2006-06-08 |
Journal Detail:
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Title: Domestic animal endocrinology Volume: 33 ISSN: 0739-7240 ISO Abbreviation: Domest. Anim. Endocrinol. Publication Date: 2007 Aug |
Date Detail:
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Created Date: 2007-07-09 Completed Date: 2007-09-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8505191 Medline TA: Domest Anim Endocrinol Country: United States |
Other Details:
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Languages: eng Pagination: 190-202 Citation Subset: IM |
Affiliation:
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Institute of Animal Nutrition, University of Zurich, Zurich, Switzerland. aliese@vetphys.unizh.ch |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Calcium / metabolism Colon / cytology, metabolism Enterocytes / metabolism* Female Goats / metabolism* Immunohistochemistry Lactation / metabolism* Pregnancy Pregnancy, Animal / metabolism* Receptors, Calcitriol / metabolism* Sheep / metabolism* |
| Chemical | |
Reg. No./Substance:
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0/Receptors, Calcitriol; 7440-70-2/Calcium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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