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Evidence for placental transfer of maternal corticosterone in a viviparous lizard
Citation
Itonaga, K and Wapstra, E and Jones, SM, Evidence for placental transfer of maternal corticosterone in a viviparous lizard, Comparative Biochemistry and Physiology. Part A: Molecular & Integrative Physiology, 160, (2) pp. 184-189. ISSN 1095-6433 (2011) [Refereed Article]
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DOI: doi:10.1016/j.cbpa.2011.05.028
Abstract
In mammals, there is experimental evidence that circulating maternal cortisol is transferred to the embryos across the placenta during gestation. Direct effects of this maternal cortisol may allow embryos to display phenotypic plasticity to cope with postnatal environments (i.e., pre-programming). The potential for maternal hormone induced-adaptation may be of considerable evolutionary significance in viviparous animals. However, to date, there is no such direct evidence that circulating maternal corticosterone passes through the placenta and into the embryos of viviparous reptiles. In this study, we assessed the transfer of (3)H-corticosterone injected into females of the lizard Pseudemoia entrecasteauxii into maternal blood, maternal liver, the embryo, the yolk and the amniotic fluid during mid-to-late gestation. We provide direct evidence that circulating maternal corticosterone passes through the placenta into the embryos in this species. Transfer of maternal corticosterone into the embryos significantly decreased at the end of embryonic development. We discuss these results in terms of the relationships between the degree of corticosterone transfer and embryonic stage. These results demonstrate the potential for direct effects of maternal corticosterone, including endocrine pre-programming, upon the developing embryos in viviparous lizards.
Item Details
Item Type: | Refereed Article |
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Research Division: | Biological Sciences |
Research Group: | Zoology |
Research Field: | Animal physiology - systems |
Objective Division: | Environmental Management |
Objective Group: | Terrestrial systems and management |
Objective Field: | Terrestrial biodiversity |
UTAS Author: | Itonaga, K (Mr Keisuke Itonaga) |
UTAS Author: | Wapstra, E (Associate Professor Erik Wapstra) |
UTAS Author: | Jones, SM (Professor Susan Jones) |
ID Code: | 72076 |
Year Published: | 2011 |
Web of Science® Times Cited: | 9 |
Deposited By: | Zoology |
Deposited On: | 2011-08-19 |
Last Modified: | 2017-10-31 |
Downloads: | 1 View Download Statistics |
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