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Immunohistochemical Localization of Basic Fibroblast Growth Factor in Ependymal Cells of the Rat Lateral and Third Ventricles

Pedro Cuevas, Guillermo Giménez‐Gallego, Ricardo Martínez‐Murillo, Fernando Carceller

Abstract

The presence of basic fibroblast growth factor (bFGF) in the third and the lateral ventricular ependyma of the rat has been investigated under the light microscope using a polyclonal antibody against bFGF, through the unlabelled peroxidase-antiperoxidase procedure; bFGF-immunoreactivity (bFGF-IR) is observed in the entire ependymal cell layer of ventricles. Also ependymal tanycytes within the inferior portion of the wall and floor of the third ventricle show bFGF-IR. Tanycytic processes are in close contact with hypothalamic capillaries. The present study strongly suggests that brain ependymal bFGF plays unidentified roles unrelated to its angiogenic or mitogenic capacities.

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Key concepts: Ependyma, Ependymal Cell, Basic fibroblast growth factor, Third ventricle, Lateral ventricles, Immunocytochemistry, Biology, Immunohistochemistry