astrocyte

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Related to astrocytic: protoplasmic astrocyte

astrocyte

 [as´tro-sīt]
a neuroglial cell of ectodermal origin, characterized by fibrous or protoplasmic processes; collectively called astroglia or macroglia.
 Astrocyte in association with a blood vessel. From Dorland's, 2000.

as·tro·cyte

(as'trō-sīt),
One of the large neuroglia cells of nervous tissue.
See also: neuroglia.
[G. astron, star, + kytos, hollow (cell)]

astrocyte

/as·tro·cyte/ (as´tro-sīt) a neuroglial cell of ectodermal origin, characterized by fibrous, protoplasmic, or plasmatofibrous processes. Collectively called astroglia.
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Astrocyte in association with a blood vessel.

astrocyte

(ăs′trə-sīt′)
n.
A star-shaped cell, especially a neuroglial cell of nervous tissue.

as′tro·cyt′ic (-sĭt′ĭk) adj.

astrocyte

[as′trōsīt′]
Etymology: Gk, aster + kytos, cell
a large, star-shaped neuroglial cell with many branches, found in certain tissues of the nervous system.
enlarge picture
Astrocyte

as·tro·cyte

(as'trō-sīt, astrŏ-sīt)
One of the large neuroglia cells of nervous tissue.
See also: neuroglia
Synonym(s): astroglia, macroglia.
[G. astēr, star, + kytos, chamber, cell]
Enlarge picture
ASTROCYTES

astrocyte

(as'tro-sit?) [ astro- + -cyte, cell]
A common, asterisk-shaped glial cell with many radiating cell processes. Astrocytes are neuroectodermal cells that begin as radial glia that later mature into multipolar cells. Astrocytes are spread homogeneously throughout the central nervous system and each astocyte occupies its own compartment of neuropil. The cell processes of an astrocyte are covered with "leaflets" of cytoplasm that contact axons, synaptic structures, blood vessels, and neighboring glia. Touching astrocytes are electrically coupled and can propagate calcium potentials and within its microdomain of neuropil, each astrocyte regulates the extracellular concentration of certain molecules, including neurotransmitters. In areas of injury, astrocytes can proliferate.
Synonym: astroglial cell See: illustrationastrocytic (as?tro-sit'ik), adjective

Cajal,

Santiago, Spanish histologist and Nobel laureate, 1852-1934.
Cajal astrocyte stain - a method for demonstrating astrocytes by impregnation in a solution containing gold chloride and mercuric chloride.
Cajal cell - Synonym(s): horizontal cell of Cajal
Cajal formol ammonium bromide solution
Cajal gold-sublimate method
Cajal uranium silver method
horizontal cell of Cajal - a small fusiform cell found in the superficial layer of the cerebral cortex with its long axis placed horizontally. Synonym(s): astrocyte; Cajal cell
interstitial nucleus of Cajal - a group of neurons believed to be involved in the integration of head and eye movements. Synonym(s): interstitial nucleus

Deiters,

Otto F.K., German anatomist, 1834-1863.
Deiters cells - the supporting cells of the organ of Corti; one of the large neuroglia cells of nervous tissue. Synonym(s): astrocyte; phalangeal cell
Deiters nucleus - lateral vestibular nucleus.
Deiters terminal frames - platelike structures in the organ of Corti uniting the outer phalangeal cells with Hensen cells.

neuroglia

non-neuronal cells located within the central and peripheral nervous systems

as·tro·cyte

(as'trō-sīt, astrŏ-sīt)
One of the large neuroglial cells of neural tissue.
See: neuroglia
[G. astēr, star, + kytos, chamber, cell]

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.
References in periodicals archive ?
Finally, this same tumor model has also been used in a more recent study that intriguingly demonstrates a potentially central role of the gene Olig2 in maintaining the proneural phenotype in OPC-induced gliomas, such that abrogation of Olig2 causes a phenotypic shift toward an EGFR-driven astrocytic lesion.
Nevertheless, treatment with IL-6 family cytokines such as LIF cannot induce astrocytic differentiation of mgNSCs.
In rodents, primary branches radiate from the astrocytic soma and gradually divide into finer and finer processes to generate a dense network of delicate terminal processes, which have been estimated to contact hundreds of dendrites from multiple neurons and to envelope 100,000 or more synapses (Bushong et al.
Pathways leading to glioblastoma multiforme: a molecular analysis of genetic alterations in 65 astrocytic tumors.
Our previous results showed that the same CAI protocol leads to motor and memory impairments in rats, accompanied by a marked neuronal death and reduced microglial and astrocytic densities in both hippocampus and motor cortex [9, 10].
This type of astrocytic response is observed in all our model systems of transmissible prion disease, but is absent from the nontransmissible forms of PrP (i.
13) Whereas AQP4 has a widespread astrocytic pattern, AQP1 has a more restricted localization.
Studies [7, 8] indicate the existence of a brain-wide pathway facilitating the exchange of CSF and interstitial fluid via para-arterial CSF influx, paravenous interstitial clearance, and a transparenchymal pathway dependent on water transport through astrocytic AQP4 channels.
Divide and conquer: functional segregation of synaptic inputs by astrocytic microdomains could alleviate paroxysmal activity following brain trauma.
No Lisch nodules or astrocytic hamartomas were noted during the ophthalmology exam.
The most common pathological features of GSS include numerous amyloid plaques, spongiform changes, neuronal loss, astrocytic microgliosis, and neurofibrillary tangles.
Activating mitochondrial regulator PGC-1alpha expression by astrocytic NGF is a therapeutic strategy for Huntington's disease.