Desenvolvimento embrionário em búfalos (Bubalus bubalis Linnaeus, 1758)

Morini, Adriana Caroprezo

doi:10.11606/t.10.2009.tde-01122009-134518

Cited by 4 publications

(7 citation statements)

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“…At 30 days, equine embryos had a primary and secondary palate (palatal vault), an omental bursa, and tubular intestinal loops with walls of differentiating epithelial cells and mesenchymal tissue. This has been also previously described for buffalo embryos of similar age (Morini, ). The present study has found differentiated hepatic cords, hepatic sinusoids, and a centrilobular vein, a monogastric stomach and a triangular pancreas at 35‐day‐old embryos.…”

Section: Discussionsupporting

confidence: 78%

“…In addition, the presence of an undifferentiated oral cavity at this period confirmed previous preliminary findings in mares (Ginther, ). Likewise, a division of the primitive intestine into compartments of the digestive system such as the esophagus, stomach, duodenum, liver, and pancreas during very early gestation has been described in the cattle (Lima, ), buffalo (Morini, ), human (Montgomery, ) and paca (Franciolli et al, ). Similar to the equine embryos studied here, the liver was the relatively largest organ in other species including the bovine (Lima, ) and human (Junqueira and Carneiro, ).…”

Section: Discussionmentioning

confidence: 99%

“…Other studies in horses have used other methods to determine embryonic age, including Acker et al (); however, these authors used small horses (ponies). For other large and precocial mammals, Morini () also reported the importance of crown‐rump length in the buffalo for determining the age of embryos and fetuses, and Assis Neto et al () referred to morphological characteristics in cattle for age determination.…”

Section: Discussionmentioning

confidence: 99%

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Prenatal Development of the Digestive System in the Horse

Rodrigues

Carvalho

Franciolli

et al. 2014

The Anatomical Record

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Since the horse has a highly precocial reproductive strategy, most organs are functionally well developed at birth and thus, embryonic and fetal life is interesting. Data on the development of important organs are very limited. Here, we detailed macroscopically and histologically the equine digestive system, focusing on the first third of gestation. At 21 days, the oral cavity was an empty space, and the liver contained proliferating endodermal cells. At 25 days, a fusiform stomach and the pancreatic bud were present. At 28 days, a small tongue and the esophagus occurred. At 30 days, primary and secondary palates were developed, the liver contained cords of hepatocytes, and the pancreas was triangular. At 40 days, crypts had formed in the intestinal loops, cell differentiation was observed in the hepatic parenchyma, and the pancreas was elongated. Pancreatic acini and islets were observed in fetuses of 50 days and intestines were highly convoluted. Three segments of the pharynx were distinguishable at 75 days. At 105 days, the intestinal villi were wide with round tips; especially, the liver, stomach, and oral cavity showed key steps of anatomical and cellular differentiation in early fetuses, whereas other areas, such as pancreas or pharynx were still immature in the investigated phase. Pluripotency analysis using Oct4 showed initial intense staining in all of the digestive system tissues and a later decreased becoming restricted to specific cell layers. In conclusion, our data may contribute to perform a chronological reference of developmental events for approaches predicting pregnancy disorders in horses.

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Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Prenatal Development of the Digestive System in the Horse

Rodrigues

Carvalho

Franciolli

et al. 2014

The Anatomical Record

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“…The YS of the bovine embryo appears at 18 to 23 days of gestation as a trilaminate cylindrical disc consisting of trophoblast, endoderm, and mesoderm [4][5][6]19,27,28] and is enclosed by a unicellular endodermal layer [20].…”

Section: Discussionmentioning

confidence: 99%

“…Microscopically, the YSs of species, such as canines [3,4], bovines [2,5], bubalines [6], and goats [7], are extrafetal membranes that are morphologically composed of three layers: the endoderm, an intermediate layer called the mesoderm, and a single layer called the mesothelium [8,9].…”

Section: Introductionmentioning

confidence: 99%

Isolation and characterization of mesenchymal stem cells from the yolk sacs of bovine embryos

Mançanares

Oliveira

et al. 2015

Theriogenology

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Bovine central nervous system development

et al. 2018

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Central nervous system (CNS) development researches are extremely important to the most common congenital disorders and organogenesis comprehension. However, few studies show the entire developmental process during the critical period. Present research can provide data to new researches related to normal development and abnormalities and changes that occur along the CNS organogenesis, especially nowadays with the need for preliminary studies in animal models, which could be used for experimental research on the influence of viruses, such as the influence of Zika virus on the development of the neural system and its correlation with microcephaly in human newborns. Then, present study describes CNS organogenesis in cattle according to microscopic and macroscopic aspects, identifying structures and correlating to gestational period. Fourteen embryos and nine bovine fetuses at different ages were collected and analyzed. All individuals were measured in order to detect the gestational period. Bovine embryo at 17 days age has its neural tube, cranial neuropore, caudal neuropore and somites developed. After 24 days of development, were observed in cranial part of neural tube five encephalic vesicles denominated: telencephalon, diencephalon, mesencephalon, metencephalon and myelencephalon. In addition, the caudal part of neural tube was identified with the primitive spinal cord. The primordial CNS differentiation occurred from 90 to 110 days. The five encephalic vesicles, primordial spinal cord and the cavities: third ventricule, mesencephalic aqueduct, fourth ventricle and central canal in spinal cord were observed. With 90 days, the main structures were identified: (1) cerebral hemispheres, corpus callosum and fornix, of the telencephalon; (2) interthalamic adhesion, thalamus, hypothalamus and epythalamus (glandula pinealis), of the diencephalon; (3) cerebral peduncles and quadruplets bodies, of the mesencephalon; (4) pons and cerebellum, of the metencephalon; (5) medulla oblongata or bulb, of the myelencephalon; and (6) spinal cord, of the primitive spinal cord. After 110 days of gestation, the five encephalic vesicles and its structures were completely developed. It was noted the presence of the spinal cord with the cervicothoracic and lumbossacral intumescences. In summary, the results describes the formation of the neural tube from the neural plate of the ectoderm, the encephalic vesicles derived from the neural tube and subsequent structural and cavities subdivisions, thus representing the complete embryology of the central nervous system.

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Desenvolvimento embrionário em búfalos (Bubalus bubalis Linnaeus, 1758)

Cited by 4 publications

References 50 publications

Prenatal Development of the Digestive System in the Horse

Prenatal Development of the Digestive System in the Horse

Isolation and characterization of mesenchymal stem cells from the yolk sacs of bovine embryos

Bovine central nervous system development

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