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Titolo:
Spatial distribution of Reissner's fiber glycoproteins in the filum terminale of the rat and rabbit
Autore:
Molina, B; Rodriguez, EM; Peruzzo, B; Caprile, T; Nualart, F;
Indirizzi:
Concepcion Univ, Fac Ciencias Biol, Neurobiol Lab, Dept Histol & Embriol, Concepcion, Chile Concepcion Univ Concepcion Chile pt Histol & Embriol, Concepcion, Chile Univ Frontera, Fac Med, Dept Ciencias Basicas, Unidad Histol, Temuco, Chile Univ Frontera Temuco Chile encias Basicas, Unidad Histol, Temuco, Chile Univ Austral Chile, Fac Med, Inst Histol & Patol, Valdivia, Chile Univ Austral Chile Valdivia Chile Inst Histol & Patol, Valdivia, Chile
Titolo Testata:
MICROSCOPY RESEARCH AND TECHNIQUE
fascicolo: 5, volume: 52, anno: 2001,
pagine: 552 - 563
SICI:
1059-910X(20010301)52:5<552:SDORFG>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
LARVAE GEOTRIA-AUSTRALIS; SUBCOMMISSURAL ORGAN; SPINAL-CORD; MASSA CAUDALIS; COMPLEX; LECTIN; LIGHT; ANTIBODIES; PEROXIDASE;
Keywords:
subcommissural organ; massa caudalis; blood vessels; immunohistochemistry; lectins; mammals;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Nualart, F Concepcion Univ, Fac Ciencias Biol, Neurobiol Lab, Dept Histol & Embriol, Casilla 160C, Concepcion, Chile Concepcion Univ Casilla 160C Concepcion Chile ncepcion, Chile
Citazione:
B. Molina et al., "Spatial distribution of Reissner's fiber glycoproteins in the filum terminale of the rat and rabbit", MICROSC RES, 52(5), 2001, pp. 552-563

Abstract

The subcommissural organ secretes into the third ventricle glycoproteins that condense to form the Reissner's fiber (RF). At the distal end of the central canal of the spinal cord, the RF-glycoproteins accumulate in the formof an irregular mass known as massa caudalis. Antibodies against RF-glycoproteins and a set of lectins were used at the light and electron microscopic level to investigate the spatial distribution of the massa caudalis material in the rat and rabbit filum terminale. In the sacral region of the rat,the central canal presents gaps between the ependymal cells through which RF-glycoproteins spread out. The bulk of massa caudalis material, however, escapes through openings in the dorsal wall of the terminal ventricle. In the rabbit, the massa caudalis is formed within the ependymal canal, at the level of the second coccygeal vertebra, it accumulates within preterminal and terminal dilatations of the central canal, and it escapes out through gaps in the dorsal ependymal wall of the terminal ventricle. The existence ofwide intercellular spaces and a large orifice (neuroporous) in the dorsal ependymal wall of the terminal ventricle, and the passage of RF-material through them, appear to be conserved evolutionary features. After leaving theterminal ventricle of the rat and rabbit, RF-glycoproteins establish a close spatial association with the numerous blood vessels irrigating the filumterminale, suggesting that in these species the blood vessels are the siteof destination of the RF-glycoproteins escaping from the central canal, thus resembling the situation found in lower vertebrates. When passing from the RF stage to the massa caudalis stage, the rabbit RF-glycoproteins lose their sialic acid residues, exposing galactose as the terminal residue. Since this sialic acid-galactose modification of RF-glycoproteins had also beendescried in lamprey larvae, it may be regarded as a conserved evolutionaryfeature associated with the formation of the massa caudalis. Microsc. Res. Tech. 52:552-563, 2001. (C) 2001 Wiley-Liss. Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 07:02:36