Morphological analysis of the placenta of paca (Agouti paca L., 1766): Study with light microscopy and transmission electron microscopy

Detalhes bibliográficos
Autor(a) principal: Bonatelli, Marina
Data de Publicação: 2001
Outros Autores: Machado, Márcia Rita Fernandes, Cruz, Claudinei, Miglino, Maria Angélica
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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spelling 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
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