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Electron microscopy of glial cells of the central nervous system in the crab Ucides cordatus BJMBR
Allodi,S.; Taffarel,M..
Invertebrate glial cells show a variety of morphologies depending on species and location. They have been classified according to relatively general morphological or functional criteria and also to their location. The present study was carried out to characterize the organization of glial cells and their processes in the zona fasciculata and in the protocerebral tract of the crab Ucides cordatus. We performed routine and cytochemical procedures for electron microscopy analysis. Semithin sections were observed at the light microscope. The Thiéry procedure indicated the presence of carbohydrates, particularly glycogen, in tissue and in cells. To better visualize the axonal ensheathment at the ultrastructural level, we employed a method to enhance the...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Glial cells; Crustaceans; Electron microscopy; Cytochemistry; Ucides cordatus.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000300013
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Zinc accumulation in phosphate granules of Ucides cordatus hepatopancreas BJMBR
Corrêa Junior,J.D.; Allodi,S.; Amado-Filho,G.M.; Farina,M..
Amorphous phosphate granules are present in vertebrate and invertebrate organisms. The functions attributed to these structures depend on their mineral contents and organic matrix composition. In the present study we have determined zinc concentrations in the hepatopancreas of the crab Ucides cordatus from regions contaminated with zinc, and the elemental composition of hepatopancreal phosphate granules. Organisms were collected from the contaminated areas of Sepetiba Bay (SB) and Guanabara Bay (GB), and from a non-contaminated area, Ribeira Bay (RB). The first two sites are located near the metropolitan region of Rio de Janeiro city, Brazil. Atomic absorption spectroscopy (AAS) showed a significant difference (P<0.05) for zinc concentration in the...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Phosphate granules; Hepatopancreas; Zinc; Energy dispersive X-ray analysis; Atomic absorption spectroscopy; Electron spectroscopic imaging.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000200009
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Diversity among satellite glial cells in dorsal root ganglia of the rat BJMBR
Nascimento,R.S.; Santiago,M.F.; Marques,S.A.; Allodi,S.; Martinez,A.M.B..
Peripheral glial cells consist of satellite, enteric glial, and Schwann cells. In dorsal root ganglia, besides pseudo-unipolar neurons, myelinated and nonmyelinated fibers, macrophages, and fibroblasts, satellite cells also constitute the resident components. Information on satellite cells is not abundant; however, they appear to provide mechanical and metabolic support for neurons by forming an envelope surrounding their cell bodies. Although there is a heterogeneous population of neurons in the dorsal root ganglia, satellite cells have been described to be a homogeneous group of perineuronal cells. Our objective was to characterize the ultrastructure, immunohistochemistry, and histochemistry of the satellite cells of the dorsal root ganglia of 17 adult...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Satellite glial cells; Peripheral nervous system; Vimentin; S-100; Electron microscopy.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008001100011
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