Morphological analysis of the placenta of paca (Agouti paca L., 1766): Study with light microscopy and transmission electron microscopy
Autor(a) principal: | |
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Data de Publicação: | 2001 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Brazilian Journal of Veterinary Research and Animal Science |
Texto Completo: | https://www.revistas.usp.br/bjvras/article/view/5875 |
Resumo: | Morphological aspects of the placenta of paca (Agouti paca, L., 1766) were studied by means of analysis with light microscopy and transmission electron microscopy of tissue samples corresponding to the portion of greatest placental connection of nine placentas in different pregnant females, in intermediary and final phases of pregnancy. We performed this study because there was, associated with the necessity of searching new specimen that might act as fine experimental models, the availability of this rodent in our environment. In the other hand, an improved knowledge of the reproductive aspects of these animals offers subsidizes to the establishment of rational raising centers of this species, since its preservation is necessary, besides the big commercial interest on its meat. The results showed that this rodent presents one vitelline and one chorio-allantoic placenta, which is a hemochorial and labyrinthine organ, histologically composed by lobules divided into three different portions: lobule center, labyrinth, and interlobule. In the lobule center portion the presence of arteries and veins was noticed, and in its peripheral portion there were two tubular systems set in a parallel way, where blood lacunas and capillaries were in close contact, constituting the labyrinth portion. Arteries and veins composed the interlobule. The main component of the placenta was the trophoblast, which independently from its site, presented a syncytio origin. Regarding the ultrastructure, the placenta barrier of paca was classified as hemomonochorial. |
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Brazilian Journal of Veterinary Research and Animal Science |
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Morphological analysis of the placenta of paca (Agouti paca L., 1766): Study with light microscopy and transmission electron microscopyAnálise morfológica da placenta da paca (Agouti paca, Linnaeus, 1766: Estudo ao microscópio de luz e à microscopia eletrônica de transmissãoPlacentaMorfologiaAgouti pacaMicroscopiaPlacentaMorphologyAgouti pacaMicroscopyMorphological aspects of the placenta of paca (Agouti paca, L., 1766) were studied by means of analysis with light microscopy and transmission electron microscopy of tissue samples corresponding to the portion of greatest placental connection of nine placentas in different pregnant females, in intermediary and final phases of pregnancy. We performed this study because there was, associated with the necessity of searching new specimen that might act as fine experimental models, the availability of this rodent in our environment. In the other hand, an improved knowledge of the reproductive aspects of these animals offers subsidizes to the establishment of rational raising centers of this species, since its preservation is necessary, besides the big commercial interest on its meat. The results showed that this rodent presents one vitelline and one chorio-allantoic placenta, which is a hemochorial and labyrinthine organ, histologically composed by lobules divided into three different portions: lobule center, labyrinth, and interlobule. In the lobule center portion the presence of arteries and veins was noticed, and in its peripheral portion there were two tubular systems set in a parallel way, where blood lacunas and capillaries were in close contact, constituting the labyrinth portion. Arteries and veins composed the interlobule. The main component of the placenta was the trophoblast, which independently from its site, presented a syncytio origin. Regarding the ultrastructure, the placenta barrier of paca was classified as hemomonochorial.Foram estudados os aspectos morfológicos de nove placentas de paca (Agouti paca, L., 1766) mediante análises em microscopia de luz e eletrônica de transmissão dos fragmentos teciduais correspondentes à porção de maior conexão placentária em diferentes fêmeas gestantes, nos estágios intermediário e final da prenhez. Realizamos este estudo, pois, aliada à necessidade da procura de novas espécies que atuem como modelos experimentais adequados, havia a disponibilidade deste roedor em nosso meio; por outro lado, o melhor conhecimento dos aspectos reprodutivos destes animais oferece subsídios ao estabelecimento de criatórios racionais desta espécie, uma vez que a preservação deste vertebrado é necessária, além do grande interesse comercial em torno de sua carne. Os resultados mostraram que este roedor possui uma placenta do tipo vitelina e outra do tipo corioalantoidiana, sendo este órgão do tipo hemocorial, labiríntico, que se apresenta histologicamente composto por lóbulos divididos em três regiões distintas: o centro do lóbulo, o labirinto e o interlóbulo. Na região do centro do lóbulo, verificou-se a presença de artérias e veias; e em sua região periférica estavam presentes dois sistemas tubulares arranjados de forma paralela, onde as lacunas sangüíneas e os capilares estavam em íntimo contato, formando a região do labirinto. O interlóbulo era composto de artérias e veias. O trofoblasto era o principal componente da placenta, que, independentemente da região onde se encontrava, mostrava-se de natureza sincicial. Ultra-estruturalmente a barreira placentária da paca foi classificada como hemomonocorial.Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia2001-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/bjvras/article/view/587510.1590/S1413-95962001000500005Brazilian Journal of Veterinary Research and Animal Science; Vol. 38 Núm. 5 (2001); 224-228Brazilian Journal of Veterinary Research and Animal Science; Vol. 38 No. 5 (2001); 224-228Brazilian Journal of Veterinary Research and Animal Science; v. 38 n. 5 (2001); 224-228Brazilian Journal of Veterinary Research and Animal Science; V. 38 N. 5 (2001); 224-2281678-44561413-9596reponame:Brazilian Journal of Veterinary Research and Animal Scienceinstname:Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)instacron:USPporhttps://www.revistas.usp.br/bjvras/article/view/5875/7406Bonatelli, MarinaMachado, Márcia Rita FernandesCruz, ClaudineiMiglino, Maria Angélicainfo:eu-repo/semantics/openAccess2020-06-23T04:39:52Zoai:revistas.usp.br:article/5875Revistahttps://www.revistas.usp.br/bjvrasPUBhttps://www.revistas.usp.br/bjvras/oaibjvras@usp.br1413-95961413-9596opendoar:https://www.revistas.usp.br/bjvras/index2023-01-12T16:42:27.026840Brazilian Journal of Veterinary Research and Animal Science - Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)false |
dc.title.none.fl_str_mv |
Morphological analysis of the placenta of paca (Agouti paca L., 1766): Study with light microscopy and transmission electron microscopy Análise morfológica da placenta da paca (Agouti paca, Linnaeus, 1766: Estudo ao microscópio de luz e à microscopia eletrônica de transmissão |
title |
Morphological analysis of the placenta of paca (Agouti paca L., 1766): Study with light microscopy and transmission electron microscopy |
spellingShingle |
Morphological analysis of the placenta of paca (Agouti paca L., 1766): Study with light microscopy and transmission electron microscopy Bonatelli, Marina Placenta Morfologia Agouti paca Microscopia Placenta Morphology Agouti paca Microscopy |
title_short |
Morphological analysis of the placenta of paca (Agouti paca L., 1766): Study with light microscopy and transmission electron microscopy |
title_full |
Morphological analysis of the placenta of paca (Agouti paca L., 1766): Study with light microscopy and transmission electron microscopy |
title_fullStr |
Morphological analysis of the placenta of paca (Agouti paca L., 1766): Study with light microscopy and transmission electron microscopy |
title_full_unstemmed |
Morphological analysis of the placenta of paca (Agouti paca L., 1766): Study with light microscopy and transmission electron microscopy |
title_sort |
Morphological analysis of the placenta of paca (Agouti paca L., 1766): Study with light microscopy and transmission electron microscopy |
author |
Bonatelli, Marina |
author_facet |
Bonatelli, Marina Machado, Márcia Rita Fernandes Cruz, Claudinei Miglino, Maria Angélica |
author_role |
author |
author2 |
Machado, Márcia Rita Fernandes Cruz, Claudinei Miglino, Maria Angélica |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Bonatelli, Marina Machado, Márcia Rita Fernandes Cruz, Claudinei Miglino, Maria Angélica |
dc.subject.por.fl_str_mv |
Placenta Morfologia Agouti paca Microscopia Placenta Morphology Agouti paca Microscopy |
topic |
Placenta Morfologia Agouti paca Microscopia Placenta Morphology Agouti paca Microscopy |
description |
Morphological aspects of the placenta of paca (Agouti paca, L., 1766) were studied by means of analysis with light microscopy and transmission electron microscopy of tissue samples corresponding to the portion of greatest placental connection of nine placentas in different pregnant females, in intermediary and final phases of pregnancy. We performed this study because there was, associated with the necessity of searching new specimen that might act as fine experimental models, the availability of this rodent in our environment. In the other hand, an improved knowledge of the reproductive aspects of these animals offers subsidizes to the establishment of rational raising centers of this species, since its preservation is necessary, besides the big commercial interest on its meat. The results showed that this rodent presents one vitelline and one chorio-allantoic placenta, which is a hemochorial and labyrinthine organ, histologically composed by lobules divided into three different portions: lobule center, labyrinth, and interlobule. In the lobule center portion the presence of arteries and veins was noticed, and in its peripheral portion there were two tubular systems set in a parallel way, where blood lacunas and capillaries were in close contact, constituting the labyrinth portion. Arteries and veins composed the interlobule. The main component of the placenta was the trophoblast, which independently from its site, presented a syncytio origin. Regarding the ultrastructure, the placenta barrier of paca was classified as hemomonochorial. |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/bjvras/article/view/5875 10.1590/S1413-95962001000500005 |
url |
https://www.revistas.usp.br/bjvras/article/view/5875 |
identifier_str_mv |
10.1590/S1413-95962001000500005 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/bjvras/article/view/5875/7406 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia |
publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia |
dc.source.none.fl_str_mv |
Brazilian Journal of Veterinary Research and Animal Science; Vol. 38 Núm. 5 (2001); 224-228 Brazilian Journal of Veterinary Research and Animal Science; Vol. 38 No. 5 (2001); 224-228 Brazilian Journal of Veterinary Research and Animal Science; v. 38 n. 5 (2001); 224-228 Brazilian Journal of Veterinary Research and Animal Science; V. 38 N. 5 (2001); 224-228 1678-4456 1413-9596 reponame:Brazilian Journal of Veterinary Research and Animal Science instname:Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP) instacron:USP |
instname_str |
Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Brazilian Journal of Veterinary Research and Animal Science |
collection |
Brazilian Journal of Veterinary Research and Animal Science |
repository.name.fl_str_mv |
Brazilian Journal of Veterinary Research and Animal Science - Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP) |
repository.mail.fl_str_mv |
bjvras@usp.br |
_version_ |
1797051555340353536 |