Placentation in the Capybara ( Hydrochaerus hydrochaeris), Agouti ( Dasyprocta aguti) and Paca ( Agouti paca)
Placentae of three hystricimorph rodents—capybara, agouti and paca—were examined by conventional histology, immunohistochemistry for cytokeratin and vimentin, and TUNEL staining. The placentae were divided into lobules of labyrinthine syncytium separated by interlobular and marginal trophoblast. The...
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| Veröffentlicht in: | Placenta (Eastbourne) 2002-05, Vol.23 (5), p.416-428 |
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| creator | Miglino, M.A. Carter, A.M. Dos Santos Ferraz, R.H. Fernandes Machado, M.R. |
| description | Placentae of three hystricimorph rodents—capybara, agouti and paca—were examined by conventional histology, immunohistochemistry for cytokeratin and vimentin, and TUNEL staining. The placentae were divided into lobules of labyrinthine syncytium separated by interlobular and marginal trophoblast. The subplacenta comprised cytotrophoblasts, supported on lamellae of allantoic mesoderm, and syncytiotrophoblast. The central excavation was still apparent in the definitive placenta of capybara. In agouti and paca, the decidua of the junctional zone formed a mesoplacenta comprising a capsule and a pedicle. Towards term the pedicle formed a tenuous attachment between placenta and uterine wall comprising a few maternal vessels surrounded by degraded tissue. In paca placenta, it was shown by TUNEL staining that breakdown of this tissue occurred by apoptosis. The visceral yolk sac was highly villous and, in agouti, the yolk sac villi were extremely long. Lateral to its attachment to the placenta, the fetal surface was covered with non-vascular yolk sac endoderm. A layer of spongiotrophoblast cells was interposed between the endoderm and the marginal trophoblast. |
| doi_str_mv | 10.1053/plac.2002.0806 |
| format | Article |
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The placentae were divided into lobules of labyrinthine syncytium separated by interlobular and marginal trophoblast. The subplacenta comprised cytotrophoblasts, supported on lamellae of allantoic mesoderm, and syncytiotrophoblast. The central excavation was still apparent in the definitive placenta of capybara. In agouti and paca, the decidua of the junctional zone formed a mesoplacenta comprising a capsule and a pedicle. Towards term the pedicle formed a tenuous attachment between placenta and uterine wall comprising a few maternal vessels surrounded by degraded tissue. In paca placenta, it was shown by TUNEL staining that breakdown of this tissue occurred by apoptosis. The visceral yolk sac was highly villous and, in agouti, the yolk sac villi were extremely long. Lateral to its attachment to the placenta, the fetal surface was covered with non-vascular yolk sac endoderm. 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The placentae were divided into lobules of labyrinthine syncytium separated by interlobular and marginal trophoblast. The subplacenta comprised cytotrophoblasts, supported on lamellae of allantoic mesoderm, and syncytiotrophoblast. The central excavation was still apparent in the definitive placenta of capybara. In agouti and paca, the decidua of the junctional zone formed a mesoplacenta comprising a capsule and a pedicle. Towards term the pedicle formed a tenuous attachment between placenta and uterine wall comprising a few maternal vessels surrounded by degraded tissue. In paca placenta, it was shown by TUNEL staining that breakdown of this tissue occurred by apoptosis. The visceral yolk sac was highly villous and, in agouti, the yolk sac villi were extremely long. Lateral to its attachment to the placenta, the fetal surface was covered with non-vascular yolk sac endoderm. A layer of spongiotrophoblast cells was interposed between the endoderm and the marginal trophoblast.</description><subject>Animals</subject><subject>Apoptosis</subject><subject>Biological and medical sciences</subject><subject>DNA Fragmentation</subject><subject>Female</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Immunohistochemistry</subject><subject>In Situ Nick-End Labeling</subject><subject>Keratins - metabolism</subject><subject>Mother. Fetoplacental unit. Mammary gland. Milk</subject><subject>Placenta - anatomy & histology</subject><subject>Placenta - metabolism</subject><subject>Pregnancy</subject><subject>Pregnancy, Animal - physiology</subject><subject>Pregnancy. Parturition. Lactation</subject><subject>Rodentia - physiology</subject><subject>Vertebrates: reproduction</subject><subject>Vimentin - metabolism</subject><subject>Yolk Sac - anatomy & histology</subject><subject>Yolk Sac - metabolism</subject><issn>0143-4004</issn><issn>1532-3102</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kE1rGzEQhkVoSdwk1x6LLi01ZJ3Rx3rlY3DapBBIDu1ZjKVxrLDe3Ui7Bf_7aPHSnHoSr-aZl-Fh7LOAhYBSXXc1uoUEkAswsDxhM1EqWSgB8gObgdCq0AD6jH1K6QUAVlrIU3YmJCyFKc2M7Z9yATU99qFteGh4vyO-xu6wwYj8O78_-Ni6HVIcEt_9CyHNr_jNczv0IUO3mA5dnvTI8Tl_zTk2nj-hGxsmqstpfsE-brFOdDm95-zPzx-_1_fFw-Pdr_XNQ-FUBX2hVig0InhXrdTGSEOVUV66UqucfeXKrVFkNJWCZJ5pJKmhlF6UwgEqdc6-HXvzVa8Dpd7uQ3JU19hQOyRbCSOWKwEZXBxBF9uUIm1tF8Me48EKsKNgOwq2o2A7Cs4LX6bmYbMn_45PRjPwdQIwOay3ERsX0junKqWM0ZkzR46yh7-Bok0uUOPIh0iut74N_7vhDSsmlRY</recordid><startdate>20020501</startdate><enddate>20020501</enddate><creator>Miglino, M.A.</creator><creator>Carter, A.M.</creator><creator>Dos Santos Ferraz, R.H.</creator><creator>Fernandes Machado, M.R.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20020501</creationdate><title>Placentation in the Capybara ( Hydrochaerus hydrochaeris), Agouti ( Dasyprocta aguti) and Paca ( Agouti paca)</title><author>Miglino, M.A. ; Carter, A.M. ; Dos Santos Ferraz, R.H. ; Fernandes Machado, M.R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c370t-39a14aa0dc793b828e783d2c54393bd7c5f83e84e51e2e784ae24052d151c0a33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Animals</topic><topic>Apoptosis</topic><topic>Biological and medical sciences</topic><topic>DNA Fragmentation</topic><topic>Female</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Immunohistochemistry</topic><topic>In Situ Nick-End Labeling</topic><topic>Keratins - metabolism</topic><topic>Mother. Fetoplacental unit. Mammary gland. Milk</topic><topic>Placenta - anatomy & histology</topic><topic>Placenta - metabolism</topic><topic>Pregnancy</topic><topic>Pregnancy, Animal - physiology</topic><topic>Pregnancy. Parturition. Lactation</topic><topic>Rodentia - physiology</topic><topic>Vertebrates: reproduction</topic><topic>Vimentin - metabolism</topic><topic>Yolk Sac - anatomy & histology</topic><topic>Yolk Sac - metabolism</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Miglino, M.A.</creatorcontrib><creatorcontrib>Carter, A.M.</creatorcontrib><creatorcontrib>Dos Santos Ferraz, R.H.</creatorcontrib><creatorcontrib>Fernandes Machado, M.R.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Placenta (Eastbourne)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Miglino, M.A.</au><au>Carter, A.M.</au><au>Dos Santos Ferraz, R.H.</au><au>Fernandes Machado, M.R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Placentation in the Capybara ( Hydrochaerus hydrochaeris), Agouti ( Dasyprocta aguti) and Paca ( Agouti paca)</atitle><jtitle>Placenta (Eastbourne)</jtitle><addtitle>Placenta</addtitle><date>2002-05-01</date><risdate>2002</risdate><volume>23</volume><issue>5</issue><spage>416</spage><epage>428</epage><pages>416-428</pages><issn>0143-4004</issn><eissn>1532-3102</eissn><coden>PLACDF</coden><abstract>Placentae of three hystricimorph rodents—capybara, agouti and paca—were examined by conventional histology, immunohistochemistry for cytokeratin and vimentin, and TUNEL staining. The placentae were divided into lobules of labyrinthine syncytium separated by interlobular and marginal trophoblast. The subplacenta comprised cytotrophoblasts, supported on lamellae of allantoic mesoderm, and syncytiotrophoblast. The central excavation was still apparent in the definitive placenta of capybara. In agouti and paca, the decidua of the junctional zone formed a mesoplacenta comprising a capsule and a pedicle. Towards term the pedicle formed a tenuous attachment between placenta and uterine wall comprising a few maternal vessels surrounded by degraded tissue. In paca placenta, it was shown by TUNEL staining that breakdown of this tissue occurred by apoptosis. The visceral yolk sac was highly villous and, in agouti, the yolk sac villi were extremely long. Lateral to its attachment to the placenta, the fetal surface was covered with non-vascular yolk sac endoderm. A layer of spongiotrophoblast cells was interposed between the endoderm and the marginal trophoblast.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><pmid>12061858</pmid><doi>10.1053/plac.2002.0806</doi><tpages>13</tpages></addata></record> |
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| subjects | Animals Apoptosis Biological and medical sciences DNA Fragmentation Female Fundamental and applied biological sciences. Psychology Immunohistochemistry In Situ Nick-End Labeling Keratins - metabolism Mother. Fetoplacental unit. Mammary gland. Milk Placenta - anatomy & histology Placenta - metabolism Pregnancy Pregnancy, Animal - physiology Pregnancy. Parturition. Lactation Rodentia - physiology Vertebrates: reproduction Vimentin - metabolism Yolk Sac - anatomy & histology Yolk Sac - metabolism |
| title | Placentation in the Capybara ( Hydrochaerus hydrochaeris), Agouti ( Dasyprocta aguti) and Paca ( Agouti paca) |
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