Development of yolk sac inversion in Galea spixii and Cavia porcellus (Rodentia, Caviidae)

Oliveira, Moacir Franco de; Vale, André Menezes do; Favaron, Phelipe Oliveira; Vasconcelos, Bruno Gomes; Oliveira, Gleidson Benevides de; Miglino, María Angélica; Mess, Andrea

doi:10.1016/j.placenta.2012.06.019

Cited by 21 publications

(36 citation statements)

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“…Thus, several taxa including rare or wildlife species have been studied by means of histology and modern methods like immunohistochemistry or proper fine structural investigations by electron microscopy. Among 2 Advances in Biology them are nonmurine rodents native to South America and Africa [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40], as was shown by Figure 2, bats [41][42][43], anteaters and armadillos [44,45], and some other taxa [46][47][48][49][50][51]. Also, there were several promising attempts to reinvestigate historical histological material from museum collections such as neotropical primates [52] or great apes [53][54][55][56] in order to answer open questions.…”

Section: Comparative Placentationmentioning

confidence: 99%

“…Also a very stable pattern of fetal membrane and placental characters has evolved on the stem lineage of hystricognath rodents [26-30, 171, 172] that is relatively similar to the placental fine structure in the human [27,28,71,101]. Inside the placenta, proliferating trophoblast cells are situated on bands of fetal mesenchyme, lined by syncytial trophoblast facing towards the maternal blood spaces [27,28,34,35,222,223]. In near term pregnancy, the exchange area consists of a single, very thin layer of syncytiotrophoblast (Figure 2(d)) as does the mature human placenta [26,171].…”

Section: Euarchontogliresmentioning

confidence: 99%

“…Implantation is invasive or superficial [172]. The guinea pig and other hystricognaths have a unique structure called a subplacenta from which extravillous trophoblast migrates to invade deeply inside the decidua (Figures 2(e) and 2(f)) and transform the maternal arteries [10,26,29,34,35,171,172,223], in parallel to the structure and function of the human cell columns [120]. Other derived character conditions of hystricognaths are the ring-shaped placenta with radial flow of maternal blood in order to increase the capacity for passive diffusion [26].…”

Section: Euarchontogliresmentioning

confidence: 99%

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Placental Evolution within the Supraordinal Clades of Eutheria with the Perspective of Alternative Animal Models for Human Placentation

Mess

2014

Advances in Biology

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Here a survey of placental evolution is conducted. Placentation is a key factor for the evolution of placental mammals that had evolved an astonishing diversity. As a temporary organ that does not allow easy access, it is still not well understood. The lack of data also is a restriction for better understanding of placental development, structure, and function in the human. Animal models are essential, because experimental access to the human placenta is naturally restricted. However, there is not a single ideal model that is entirely similar to humans. It is particularly important to establish other models than the mouse, which is characterised by a short gestation period and poorly developed neonates that may provide insights only for early human pregnancy. In conclusion, current evolutionary studies have contributed essentially to providing a pool of experimental models for recent and future approaches that may also meet the requirements of a long gestation period and advanced developmental status of the newborn in the human. Suitability and limitations of taxa as alternative animal models are discussed. However, further investigations especially in wildlife taxa should be conducted in order to learn more about the full evolutionary plasticity of the placenta system.

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Section: Comparative Placentationmentioning

confidence: 99%

Section: Euarchontogliresmentioning

confidence: 99%

Section: Euarchontogliresmentioning

confidence: 99%

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Placental Evolution within the Supraordinal Clades of Eutheria with the Perspective of Alternative Animal Models for Human Placentation

Mess

2014

Advances in Biology

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“…Spix's yellow-toothed (SYT) cavy (Galea spixii, Wagler, 1831), the experimental model utilized in present research (Larcher, 1981;Oliveira et al, 2012) belongs to family Caviidae and subfamily Caviinae (Zappes et al, 2014), occurs in a wide variety of open habitats and can reproduce throughout year because females can support pregnancy even devoid ideal feeding conditions (Larcher, 1981). It is found in semiarid to arid climate region of Brazilian Northeastern (Oliveira et al, 2008) where it is constantly used as an alternative source of protein for inhabitants of this region.…”

Section: Introductionmentioning

confidence: 99%

Adrenal glands of Spix's yellow-toothed cavy (Galea spixii, Wagler, 1831): morphological and morphometric aspects

et al. 2016

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Considering the physiological importance and need of greater morphophysiological knowledge of adrenal glands, the aims of present study were compare the morphometric data between left and right adrenal of male and female; perform a histological, scanning and transmission electron microscopy study showing tissue constitution of glands; finally, in order to define the presence and correct site of the cytochrome P450c17 expression in adrenal glands, immunohistochemical study of this enzyme was performed in 18 adrenal glands (right n=9 and left n=9) of nine adult Galea spixii (four males and five females). Right adrenal was more cranially positioned than left adrenal; dimensions (weight, length and width) of right adrenal was larger than left adrenal; no differences between male and female body and adrenal measurements were found; the morphology of cells and different amounts of lipid droplets may be related to the different demands of steroid hormones production, related to each zone of the adrenal cortex; and, the cytochrome P450c17 immunolocalization in fasciculate and reticular zone may be related with synthesis of 17-hydroxy-pregnenolone, 17-hydroxy-progesterone, dehydroepiandrosterone or androstenedione.Keywords: adrenal cortex, adrenal medulla, CYP, steroidogenic enzymes, wild rodents. Glândulas adrenais de preás (Galea spixii, Wagler, 1831):aspectos morfológicos e morfométricos ResumoConsiderando a importância fisiológica e a necessidade de melhor conhecimento morfofisiológico das glândulas adrenais, os objetivos do presente estudo foram comparar dados morfométricos entre adrenais direitas e esquerdas de machos e fêmeas; realizar estudos histológicos e microscopia eletrônica de varredura e transmissão revelando a constituição tecidual das glândulas; finalmente, foi realizado estudo imunohistoquímico com objetivo de definir a presença e correto sítio de expressão da citocromo P450c17 nas glândulas adrenais em 18 glândulas adrenais (direita n=9 e esquerda n=9) de nove Galea spixii adultos (quatro machos e cinco fêmeas). A glândula adrenal direita estava posicionada mais cranialmente que a adrenal esquerda; as dimensões (peso, comprimento e largura) da glândula adrenal direita foram maiores que as da esquerda; não houve diferença entre as medidas corpóreas e das adrenais entre machos e fêmeas; a morfologia das células e diferentes quantidades de gotículas lipídicas podem estar relacionadas a diferentes demandas na produção de hormônios esteroides relacionados a cada zona do córtex adrenal; e, a imunolocalização da citocromo P450 na zona fasciculada e reticular pode estar relacionado com a síntese de 17-hidroxi-pregnenolona, 17-hidroxi-progesterona, dehidroepiandrosterona ou androstenediona.Palavras-chave: córtex adrenal, medula adrenal, CYP17, enzimas esteroidogênicas, roedores silvestres.

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“…The literature on the Spix's yellow-toothed cavy is restricted to studies on vascularisation (Oliveira et al 2011;Original Paper Veterinarni Medicina, 61, 2016 (6): 337-343 doi: 10.17221/206/2015-VETMED Oliveira et al 2012a;Oliveira et al 2013), placentation (Oliveira et al 2012b;Vale et al 2013) and reproduction (Santos et al 2012), whereas studies on the nervous system are limited to the lumbosacral plexus (Oliveira et al 2010;Oliveira et al 2014). The study of the morphology of species found in the wild is assuming growing importance, especially of those species with zootechnical potential or biological value, as is the case with Galea spixii, a rodent of great importance, since their meat is used as a source of animal protein for poor people or even more broadly owing to cultural habits in the north-eastern part of Brazil.…”

mentioning

confidence: 99%

Origin and distribution of the brachial plexus in the Spix's yellow-toothed cavy (Galea spixii Wagler, 1831) (Rodentia, Caviidae)

Araujo¹,

Oliveira²,

Silva³

et al. 2016

Vet. Med.

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Due to the absence of literature on the brachial plexus in the Spix's yellow-toothed cavy, this study was conducted to examine the origin and neural distribution of this rodent's brachial plexus. Ten adult animals obtained from previous experiments were thawed, fixed in 10% formalin solution for 72 h and then dissected. Cotton blocks soaked in 2% hydrogen peroxide were placed on the ventral roots of the plexus. Photographs of the most representative specimens were taken and schematic sketches were prepared to illustrate the results. The Spix's yellow-toothed cavy's brachial plexus primarily originated from the ventral roots of the sixth (C 6 ), seventh (C 7 ) and eighth (C 8 ) cervical nerves and from the first two thoracic nerves (T 1 , T 2 ), and less frequently from C 6 -T 1 or C 6 -T 3 . The peripheral nerve trunks of the Spix's yellow-toothed cavy's brachial plexus are the following: suprascapularis (C 6 -C 7 ), axillaris (C 6 -C 7 ), subscapulares (C 6 -C 7 ), cranial pectoral (C 6 -C 7 ), musculocutaneous (C 7 -C 8 ), radialis (C 7 -T 2 ), medianus (C 7 -T 2 ), ulnaris (C 7 -T 2 ), pectorales caudales (C 7 -C 8 ), thoracicus longus (C 7 -C 8 ), thoracicus lateralis (C 7 -T 2 ) and thoracodorsalis (C 7 -T 2 ).Keywords: anatomy; brachial plexus; nervous system; rodent; Galea spixii List of abbreviations C 6 = ventral root of C 6 ; C 7 = ventral root of C 7 ; C 8 = ventral root of C 8 ; T 1 = ventral root of T 1 ; T 2 = ventral root of T 2 ; T 3 = ventral root of T 3

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Development of yolk sac inversion in Galea spixii and Cavia porcellus (Rodentia, Caviidae)

Cited by 21 publications

References 12 publications

Placental Evolution within the Supraordinal Clades of Eutheria with the Perspective of Alternative Animal Models for Human Placentation

Placental Evolution within the Supraordinal Clades of Eutheria with the Perspective of Alternative Animal Models for Human Placentation

Adrenal glands of Spix's yellow-toothed cavy (Galea spixii, Wagler, 1831): morphological and morphometric aspects

Origin and distribution of the brachial plexus in the Spix's yellow-toothed cavy (Galea spixii Wagler, 1831) (Rodentia, Caviidae)

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