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Your search keyword '"Marín-Girón F"' showing total 2 results
Start Over Author "Marín-Girón F" Topic neuroglia
2 results on '"Marín-Girón F"'

1. Presence of microglia-like cells in the neurohypophysis of normal and dehydrated rats.

Author

Pérez-Fígares JM, Fernández-Llebrez P, Pérez J, and Marín-Girón F

Subjects
Animals, Microscopy, Electron, Neuroglia cytology, Neuroglia ultrastructure, Pituitary Gland, Posterior cytology, Pituitary Gland, Posterior ultrastructure, Rats, Rats, Inbred Strains, Dehydration pathology, Neuroglia pathology, Pituitary Gland, Posterior pathology
Abstract

By use of electron microscopy, in addition to conventional pituicytes small irregular cells were found in the hypophysial neural lobe of both normal and dehydrated adult rats. These cells were characterized by their irregular profiles, showing many multidirectional cytoplasmic processes, and by their dense nuclei and cytoplasm. They were located in both perivascular and interstitial positions. The cells in the first site were more numerous and showed frequent contacts with the parenchymal or endothelial basal laminae. Both showed basically the same submicroscopic features, displaying a well-developed Golgi apparatus and several dense bodies, presumably primary and secondary lysosomes. Cells were related to axons and nerve endings lying in the intercellular and in the perivascular spaces. Their ultrastructural features closely resembled those of microglial cells. The participation of these cells in the activities of neural lobe is discussed.

Published
1986

2. The intra-ocular portion of the optic nerve in the turtle Mauremys caspica

Author

Jc, Dávila, Guirado S, de la Calle A, and Marín-Girón F

Subjects
genetic structures, Optic Nerve, Eye, eye diseases, Axons, Turtles, Microscopy, Electron, Oligodendroglia, nervous system, Connective Tissue, Astrocytes, Animals, sense organs, Neuroglia, Research Article
Abstract

The cytoarchitecture of the intra-ocular optic nerve was investigated by light and electron microscopy. Glial cells in the intra-ocular portion are disposed among the axons, either scattered or forming columns, and bordering the nervous parenchyma. Astroglia forms the limiting glia that separates the optic nerve from the vitreous body, retina, choroid and sclera. Indentations of choroid-scleral tissue are observed in the limiting glial sheet as well as an abundance of hemidesmosomes in the astrocytic plasma membranes that abut onto the basal lamina. At the scleral level there is no connective tissue structure similar to the mammalian lamina cribrosa. However, astrocytes in this region are regularly arranged in thick columns and their processes cross throughout the nerve perpendicular to the axons, forming a framework through which the nerve fibres pass. Numerous myelinated and unmyelinated axons are present in the intra-ocular portion. Oligodendrocytes are also present in close relation with myelinated axons. A deep connective tissue septum arises from the ventral region of the optic nerve and extends along the intra-ocular portion.

Published
1987

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