| Microvascularization on collared peccary placenta: a microvascular cast study [corrected] in late pregnancy. | |
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MedLine Citation:
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PMID: 22775252 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The microvascularization of the collared peccary (Tayassu tajacu) placenta was studied by vascular casts and immunolocalization of α-smooth muscle actin and vimentin, to identify the three dimensional organization and vascular flow interrelation in the microvasculature between the maternal and fetal compartments of the placentae. The immunolocalization of vimentin in the vascular endothelium and in the smooth muscle cells of blood vessels showed indented capillaries along the uterine epithelium and the trophoblast at the sides of complementary maternal and fetal microfolds, or rugae. This confers the three-dimensional structure observed in vascular casts. On the maternal side, casts demonstrated uterine folds coated by with primary and secondary ridges, and by areolae dispersed between these ridges. The arteriole runs through the center/middle of ridges, branching at the top into a microvascular network wall in a basket-like fashion. At the base of these baskets venules were formed. On the fetal side, arterioles branched centrally in the fetal rugae into a capillary network in a bulbous form, complementary to the opposite maternal depressions forming the baskets. At the base of the bulbous protrusions, the fetal venules arise. The blood vessel orientation in the materno-fetal interface of the placentae of collared peccaries suggests a blood flow pattern of the type countercurrent to cross current. The same pattern has been reported in domestic swine demonstrating that, even after 38 million years, the Tayassuidae and Suidae families exhibit similar placental morphology, which is here characterized at the microvascular level. |
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Authors:
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Tatiana Carlesso Santos; Moacir Franco Oliveira; Vibeke Dantzer; Maria Angélica Miglino |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Zoological science Volume: 29 ISSN: 0289-0003 ISO Abbreviation: Zool. Sci. Publication Date: 2012 Jul |
Date Detail:
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Created Date: 2012-07-10 Completed Date: 2012-09-06 Revised Date: 2012-09-10 |
Medline Journal Info:
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Nlm Unique ID: 8702287 Medline TA: Zoolog Sci Country: Japan |
Other Details:
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Languages: eng Pagination: 437-43 Citation Subset: IM |
Affiliation:
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Department of Animal Science, State University of Maringá, Paraná, Brazil. tcsantos@uem.br |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Actins
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genetics,
metabolism Animals Artiodactyla / anatomy & histology*, physiology* Female Fetus / blood supply Gene Expression Regulation Neovascularization, Physiologic / physiology Placenta / blood supply*, ultrastructure Pregnancy Vimentin / genetics, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Actins; 0/Vimentin |
| Comments/Corrections | |
Erratum In:
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Zoolog Sci. 2012 Aug;29(8):546 |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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