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astrocyte |
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astrocyte /as·tro·cyte/ (as´tro-sit) a neuroglial cell of ectodermal origin, characterized by fibrous, protoplasmic, or plasmatofibrous processes. Collectively called astroglia. ) Astrocyte in association with a blood vessel.
astrocyte a neuroglial cell of ectodermal origin, characterized by fibrous or protoplasmic processes; collectively called astroglia or macroglia. gemistocytic astrocyte a plump astrocyte which results from injury to nervous tissue. Usually an extensive area is involved. |
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3) Transsphenoidal encephaloceles contain mature neuroglial cells with a varying degree of gliosis, in which astrocytes have divided and formed fibrillary networks called glial scar tissue. Although the cellular target of Pb is still elusive, exposure to Pb activates protein kinase C (PKC) in several types of cells, such as astrocytes and neuronal cells in the brain (Costa 1998; Markovac and Goldstein 1988). After the transplantation into the brains of young mice, the neural precursor cells give rise to functioning neurons and astrocytes, a star-shaped cell of the brain and spinal cord. |
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