The Plexus Chorioideus in the Adult Goat: A Scanning Electron Microscope Study

Rajtová, V

doi:10.2754/avb200069030167

Cited by 7 publications

(13 citation statements)

References 21 publications

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“…In adult sheep, as has been found in adult goats, it is also valid for their prenatal period (Rajtová 1997(Rajtová , 2000. No differences were recorded which would be connected with the sexual differentiation as was found in case of the ependymal lining of the cerebral ventricles of the brain.…”

Section: Discussionmentioning

confidence: 76%

“…There was an abundant occurrence of epiplexal cells in goats in the third cerebral ventricle, above all, in the region of foramen interventriculare (Rajtová 2000); in adult sheep their presence was substantially lower. Their occurrence was recorded, especially in the fourth but also in the lateral cerebral ventricle.…”

Section: Discussionmentioning

confidence: 97%

“…The small spherical or elongated protrusions of secretion in the adult sheep studied occurred abundantly on the PCH surface in the lateral and fourth cerebral ventricle, while in the region of the third ventricle their presence was rarer. Unlike in sheep, in adult goats the secretory protrusions were recorded only in the ventriculus lateralis (Rajtová 2000).…”

Section: Discussionmentioning

confidence: 98%

“…If the results in the adult sheep presently studied are compared with those in adult goats (Rajtová 2000) some common, but also different characteristics may be stated. The apical membranes of the ependymal cells of the PCH in both species of small ruminants are markedly convex and the PCH ventriculi quarti surface is the most folded, and therefore it is very fragile.…”

Section: Discussionmentioning

confidence: 99%

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Scanning Electron Microscopy of Plexus Choroideus in Adult Sheep

Rajtová¹

2002

Acta Vet. Brno

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The outer morphology of the surface of the ependymal lining of the plexus choroideus was studied within the whole ventricular system of the brain in adult sheep using a scanning electron microscope. The more abundant occurrence of spherical secretory protrusions was found on the plexus choroideus (PCH) in the lateral cerebral ventricle. A frequent finding of the macrophagelike epiplexal cells was recorded on the PCH in the region of the lateral as well as the fourth ventricle. No differences were found in the structure of the PCH surface, which could be related to the sexual differentiation of the sheep. Our results are compared, above all, with those found in the adult goat and in the foetuses of both species of small ruminants. Central nervous system, plexus choroideus, cerebral ventricles, adult sheepLess attention has been paid to the study of the plexus choroideus as one of the structures of the ventricular system of the brain in different species of mammals using the scanning electron microscope than to the structure of the surface of the ependymal lining. In the prenatal but also in postnatal period, the surface of the PCH in laboratory rodents was observed by Yamadori (1972), Hosoya and Fujita (1973), Chamberlain (1974), Peters (1974), Mestres and Breipohl (1976), Peters and Swan (1979), in the dog (Allen 1975;Persky 1980), in the cat (Clementi and Marini 1972), in the rhesus macaque (Ling 1983), and in humans (Scott et al. 1972(Scott et al. , 1974Otani and Tanaka 1988, O'Rahilly andMüller 1990). In farm mammals the PCH was studied in the goat and sheep foetuses but also in the adult goat (R ajtová 1997, 2000). There is no record of the structure of the surface of epithelial cells that cover the PCH in adult sheep.The aim of the work was to describe the epithelial surface of the PCH in the lateral, third and fourth cerebral ventricles in adult sheep with the aid of a scanning electron microscope. Materials and MethodsTen healthy adult sheep (5 ewes and 5 rams) were used. The animals were killed in March and October by exsanguination following thiopental anaesthesia. Immediately after exsanguination, the heads of the animals were perfused through the a. carotis communis with 0.2 mol/l phosphate buffer solution and prefixed with Karnovsky solution. The specimens of the individual parts of the plexus choroideus were postfixed in 3% glutaraldehyde in 0.2 mol/l cacodylate buffer. The temperature of the solutions was 4 °C, pH 7.4. The specimens were processed by the method of Murakami et al. (1977), dehydrated, dried by the critical point method and coated with gold in vacuum. Then they were studied in the Tesla BS 340 scanning electron microscope with image analysis. ResultsThe plexus choroideus ventriculi lateralis forms low folds. The periphery of the ependymal cells is irregularly round, almost elongated. The apical membranes of most lining ependymal cells are convex, covered with thick, short, densely arranged microvillus-like structures. Among them on numerous sites are abundant, predominantly small and...

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Section: Discussionmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

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Scanning Electron Microscopy of Plexus Choroideus in Adult Sheep

Rajtová¹

2002

Acta Vet. Brno

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“…Although the ultrastructure of the CP has already been studied in a range of mammals (Rajtova, 2000, 2002; Adami et al, 2005), this has not been studied in the porcine CP. Nevertheless, the porcine CP is used for research on xenotransplantation in chronic disease models to study Huntington’s disease (Borlongan, 2004; Emerich, 2006).…”

Section: Introductionmentioning

confidence: 99%

Electron Microscopic Study of the Porcine Choroid Plexus Epithelium

Spiegelaere

Casteleyn

Broeck

et al. 2008

Anat Histol Embryol

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The choroid plexus (CP) is a highly vascularized organ in the brain ventricles which acts as the main producer of cerebrospinal fluid (CSF). A study of the surface ultrastructure of the porcine CP was performed using scanning and transmission electron microscopy. The vascular walls of the capillaries were fenestrated. Epiplexus cells of different morphology were abundant on top of the epithelial surface. Two types of epithelial cells were present, characterized by the presence or absence of microvilli. Some epithelial cells contained cilia while other cells had large secretory protrusions called blebs. In the choroid epithelium of the lateral ventricles, some cells with large depressions were present. Cells with peduncles, such as recently discovered in the buffalo, could not be recognized. The variability of the choroidal surface structures clearly indicates the active role of the CP in the formation and maintenance of the CSF and its components.

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Development of the Cerebrospinal Fluid Pathways During Embryonic and Fetal Life in Humans

Catala¹

2019

Pediatric Hydrocephalus

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The Plexus Chorioideus in the Adult Goat: A Scanning Electron Microscope Study

Cited by 7 publications

References 21 publications

Scanning Electron Microscopy of Plexus Choroideus in Adult Sheep

Scanning Electron Microscopy of Plexus Choroideus in Adult Sheep

Electron Microscopic Study of the Porcine Choroid Plexus Epithelium

Development of the Cerebrospinal Fluid Pathways During Embryonic and Fetal Life in Humans

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