Scanning electron microscopy study of the choroid plexus in the monkey (Cebus apella apella)

Tâmega, O. J.; Tirapelli, Luís Fernando; Petroni, Sidnei

doi:10.1590/s0004-282x2000000500005

Cited by 12 publications

(10 citation statements)

References 12 publications

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“…In general, SEM and TEM analyses of the CPs from buffalo brain showed morphological and structural features similar to those reported in other mammalian species (Adami et al, 2005;De Spiegelaere et al, 2008;Gomez and Potts, 1981;Miodonski et al, 1979;Peters and Swan, 1979;Rajtovà , 2002;Scala et al, 1994;Tamega et al, 2000;Webster, 1976). The blood microvasculature is the major component of the CPs responsible for the formation of the CSF.…”

Section: Discussionsupporting

confidence: 82%

Microvasculature of the buffalo (Bubalus bubalis) choroid plexuses: Structural, histochemical, and immunocytochemical study

Scala

Corona

Langella

et al. 2010

Microscopy Res & Technique

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The choroid plexuses (CPs) in mammals produce the cerebrospinal fluid (CSF). In the literature, the morphology of CPs and the process that regulates the production of CSF are virtually nonexistent for domestic ruminants. Thus this study has two aims: 1. to investigate the morpho-structure of the buffalo CP microvasculature utilizing light microscopy (LM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques, and 2. to investigate the relationship between the blood vessels and both the elongated cells and the cells with multiple protrusions located in the CPs. SEM and TEM analyses of the CPs from buffalo brain showed morphological and structural features similar those reported in other mammalian species. Moreover the blood microvasculature is the major component responsible for the formation of the CSF, secreted by the encephalic CPs. In addition the chemical composition of this fluid depends on several morpho-functional characteristics of the vascularization of the CPs. These characteristics are as follows: two shapes of the vascular organization: lamina-like and ovoid-like elongated cells of the CPs, which connect the ventricular cavities to the blood capillaries; and the CP capillaries have diverse forms. In the present study the employment of NADPHd and NOS I was taken as indirect evidence for the presence of NO for investigation their specific role in CPs. Then NOS I immunoreactivity is found in the walls of CP blood vessels demonstrating indirectly the presence of NO with a vaso-dilatatory and autoregulation function of vascular tone by cholinergic nerve stimulation of blood vessel smooth muscle.

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Section: Discussionsupporting

confidence: 82%

Microvasculature of the buffalo (Bubalus bubalis) choroid plexuses: Structural, histochemical, and immunocytochemical study

Scala

Corona

Langella

et al. 2010

Microscopy Res & Technique

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“…At both SEM and TEM analyses, CPs from buffalo brain show many morphological features similar to those reported for other species of mammals (Peters and Swan, 1979; Miodonski et al, 1979; Gomez and Potts, 1981; Scala et al, 1994; Tamega et al, 2000; Rajtovà, 2002; Adami et al, 2005; Mathew, 2007). CPs appear well developed with laminar or folded structural organization.…”

Section: Discussionsupporting

confidence: 73%

Structural and Functional Features of Choroid Epithelium from Buffalo Brain

Scala

Corona²,

Pavone

et al. 2007

The Anatomical Record

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Choroid plexuses (CPs) play pivotal roles in many processes that establish, survey, and maintain the biochemical and cellular status of the central nervous system (CNS). Changes in the anatomy and physiology of CPs have been linked to several CNS diseases. However, CP structure and function are not definitely known. Here, we report structural and functional features of choroid epithelium from buffalo brain never described before. Mixed with common epithelial cells, two novel cell types were identified by scanning and transmission electron microscopies. The first peculiar cells showed a globular apical portion projecting into the ventricular cavities, and a basal peduncle in direct contact with blood capillaries underlying the epithelium. The second type of cells resulted to be formed by a globular body from which depart numerous processes; these cells, localized deeply in the choroid epithelium, strictly contact neighboring epithelial cells. No synaptic contacts were detected between these cell populations and common epithelial cells. To gain some insight into the functional properties of choroid cells, NADPH diaphorase (NADPHd) and neuronal nitric oxide synthase (nNOS) activities were evaluated. Of interest, whereas a strong NADPHd activity was detected in all cell types of choroid epithelium, nNOS was only detected in the first type of peculiar cells. The presence of nNOS in the CPs was confirmed by Western blotting. These results suggest that nitric oxide may serve as a signal for the regulation of CP multiple functions. Anat Rec, 290:1399Rec, 290: -1412Rec, 290: , 2007Rec, 290: . 2007 Wiley-Liss, Inc.Key words: buffalo brain; choroid plexus; NADPH-d; nNOS; scanning electron microscopy; transmission electron microscopy Abbreviations used: Abbreviations used B 5 bleb; BC 5 blood capillary; BM 5 basal membrane; BME 5 endothelium basal membrane; C 5 cilia; CB 5 cellular body; CC 5 choroid epithelial cell; Cn 5 connective tissue of the sub-epithelium; CNS 5 central nervous system; CP 5 choroid plexus; CSF 5 cerebrospinal fluid; E 5 capillary endothelium; ECE 5 extended cellular element; G 5 globular portion; Tj 5 tight junction; Gp 5 gold particle; Gpm 5 gold particle mass; H 5 hallmark of the extended cellular element sticking point to the blood capillary; M 5 microvilli on the apical cell surface; Mf 5 microfilaments; Mi 5 mitochondria; N* 5 nucleus of an extended cellular element; N 5 nucleus; N8 5 nucleus of a choroid epithelial cell; NADPHd 5 NADPH diaphorase; Ne 5 stained irregular cellular formation; nNOS 5 neuronal nitiric oxide synthase; NO 5 nitric oxide; Np 5 pericyte nucleus; Op 5 holes; P 5 pinocytic sites; Pe 5 peduncle; Pr 5 cellular protrusion; Ps 5 cellular processes; RER 5 rough endoplasmic reticulum; S 5 smooth cell surface; SEC 5 suprachoroidal cell; SEM 5 Scanning electron microscopy; SER 5 smooth endoplasmic reticulum; TEM 5 transmission electron microscopy; W 5 diaphragm on the blood capillary wall

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“…The folds observed on the surface of the choroid plexus of the lateral ventricles of the horse have also been identified in cats (Clementi and Marini, 1972), dogs (Gomez and Potts, 1981), sheep and goat fetuses (Rajtová, 1997), sheep (Rajtová, 2002), and monkeys (Tamega et al, 2000).…”

Section: Discussionmentioning

confidence: 87%

“…Microvilli and cilia have been identified in the choroid plexuses of the cerebral ventricles of rats (Chamberlain, 1973), cats (Clementi and Marini, 1972), mice (Dohrmann and Herdson, 1970), sheep and goat fetuses (Rajtová, 1997), goats and sheep (Rajtová, 2000, 2002) and monkeys (Tamega et al, 2000). When present in the choroid plexus, the number of cilia is small, while most of the ependyma that lines the cavities of the cerebral ventricles of mammals is characterized by a large number of cilia (Peters and Swan, 1979; Seymour and Berry, 1979).…”

Section: Discussionmentioning

confidence: 99%

“…Studies investigating morphological aspects of the choroid plexuses of the cerebral ventricles have been performed on various animals, such as birds (Hilton, 1955), reptiles (Weiger and Lametschwandtner, 1988), sheep (Rajtová, 2002), dogs (Gomez and Potts, 1981), cats (Miodonski et al., 1979), rodents (Peters and Swan, 1979), and monkeys (Tamega et al., 2000).…”

Section: Introductionmentioning

confidence: 99%

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Scanning Electron Microscopy of the Choroid Plexus of the Lateral Ventricle of the Horse

Adami

Faria

Almeida

et al. 2005

Anat Histol Embryol

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The present study examined the ultrastructure of the choroid plexus of the lateral ventricle of the horse. The material was fixed in 2.5% glutaraldehyde in 0.1 m sodium phosphate buffer, pH 7.3, processed and analysed by scanning electron microscopy. The choroid plexus was characterized by regions with a predominance of villi, which resembled finger-like projections or bunches of grapes, and others where straight and uniform folds predominated. Epithelial cells projected into the ventricle and large amounts of cilia and microvilli were observed on their surface. The choroid glomus corresponded to a dilatation of the choroid plexus and was characterized by blood vessels of different calibres surrounded by connective tissue.

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Scanning electron microscopy study of the choroid plexus in the monkey (Cebus apella apella)

Cited by 12 publications

References 12 publications

Microvasculature of the buffalo (Bubalus bubalis) choroid plexuses: Structural, histochemical, and immunocytochemical study

Microvasculature of the buffalo (Bubalus bubalis) choroid plexuses: Structural, histochemical, and immunocytochemical study

Structural and Functional Features of Choroid Epithelium from Buffalo Brain

Scanning Electron Microscopy of the Choroid Plexus of the Lateral Ventricle of the Horse

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