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Diversification and conservation of the extraembryonic tissues in mediating nutrient uptake during amniote development
The transfer of nutrients from the mother through the chorioallantoic placenta meets the nutritional needs of the embryo during human prenatal development. Although all amniotes start with a similar “tool kit” of extraembryonic tissues, an enormous diversity of extraembryonic tissue formation has ev...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Blackwell Publishing Inc
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3499656/ https://www.ncbi.nlm.nih.gov/pubmed/23050970 http://dx.doi.org/10.1111/j.1749-6632.2012.06726.x |
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author | Sheng, Guojun Foley, Ann C |
author_facet | Sheng, Guojun Foley, Ann C |
author_sort | Sheng, Guojun |
collection | PubMed |
description | The transfer of nutrients from the mother through the chorioallantoic placenta meets the nutritional needs of the embryo during human prenatal development. Although all amniotes start with a similar “tool kit” of extraembryonic tissues, an enormous diversity of extraembryonic tissue formation has evolved to accommodate embryological and physiological constraints unique to their developmental programs. A comparative knowledge of these extraembryonic tissues and their role in nutrient uptake during development is required to fully appreciate the adaptive changes in placental mammals. Here, we offer a comparative embryological perspective and propose that there are three conserved nutrient transfer routes among the amniotes. We highlight the importance of the yolk sac endoderm, thought to be a vestigial remnant of our amniote lineage, in mediating nutrient uptake during early human development. We also draw attention to the similarity between yolk sac endoderm-mediated and trophectoderm-mediated nutrient uptake. |
format | Online Article Text |
id | pubmed-3499656 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Blackwell Publishing Inc |
record_format | MEDLINE/PubMed |
spelling | pubmed-34996562012-11-20 Diversification and conservation of the extraembryonic tissues in mediating nutrient uptake during amniote development Sheng, Guojun Foley, Ann C Ann N Y Acad Sci Original Articles The transfer of nutrients from the mother through the chorioallantoic placenta meets the nutritional needs of the embryo during human prenatal development. Although all amniotes start with a similar “tool kit” of extraembryonic tissues, an enormous diversity of extraembryonic tissue formation has evolved to accommodate embryological and physiological constraints unique to their developmental programs. A comparative knowledge of these extraembryonic tissues and their role in nutrient uptake during development is required to fully appreciate the adaptive changes in placental mammals. Here, we offer a comparative embryological perspective and propose that there are three conserved nutrient transfer routes among the amniotes. We highlight the importance of the yolk sac endoderm, thought to be a vestigial remnant of our amniote lineage, in mediating nutrient uptake during early human development. We also draw attention to the similarity between yolk sac endoderm-mediated and trophectoderm-mediated nutrient uptake. Blackwell Publishing Inc 2012-10 2012-10-10 /pmc/articles/PMC3499656/ /pubmed/23050970 http://dx.doi.org/10.1111/j.1749-6632.2012.06726.x Text en © 2012 New York Academy of Sciences. http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation. |
spellingShingle | Original Articles Sheng, Guojun Foley, Ann C Diversification and conservation of the extraembryonic tissues in mediating nutrient uptake during amniote development |
title | Diversification and conservation of the extraembryonic tissues in mediating nutrient uptake during amniote development |
title_full | Diversification and conservation of the extraembryonic tissues in mediating nutrient uptake during amniote development |
title_fullStr | Diversification and conservation of the extraembryonic tissues in mediating nutrient uptake during amniote development |
title_full_unstemmed | Diversification and conservation of the extraembryonic tissues in mediating nutrient uptake during amniote development |
title_short | Diversification and conservation of the extraembryonic tissues in mediating nutrient uptake during amniote development |
title_sort | diversification and conservation of the extraembryonic tissues in mediating nutrient uptake during amniote development |
topic | Original Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3499656/ https://www.ncbi.nlm.nih.gov/pubmed/23050970 http://dx.doi.org/10.1111/j.1749-6632.2012.06726.x |
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