Dictionary » A » Astrocytes



The largest and most numerous neuroglial cells in the brain and spinal cord. Astrocytes (from star cells) are irregularly shaped with many long processes, including those with end feet which form the glial (limiting) membrane and directly and indirectly contribute to the blood-brain barrier. They regulate the extracellular ionic and chemical environment, and reactive astrocytes (along with microglia) respond to injury. Astrocytes have high- affinity transmitter uptake systems, voltage-dependent and transmitter-gated ion channels, and can release transmitter, but their role in signaling (as in many other functions) is not well understood.

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Re: connexins & pannexins

... channels that play paracrine roles by releasing ATP and, thus, modulating the range of the intercellular Ca2+-wave transmission between astrocytes in culture.

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by brad000123
Sat Oct 20, 2012 11:54 am
Forum: Molecular Biology
Topic: connexins & pannexins
Replies: 6
Views: 5277

References (Papers/Reviews) in a Thesis

Hello, currently I am writing my Bachelor thesis. My topic deals about Astrocytes (Neurosciences). I want to write a short introduction about astrocytes and some other important elements of the CNS. I get my informations from papers and reviews, books doesn't ...

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by zulu
Thu Dec 17, 2009 4:50 pm
Forum: General Discussion
Topic: References (Papers/Reviews) in a Thesis
Replies: 1
Views: 945

Re: blood brain barrier

... movement of molecules. There is no such movement in brain endothelial cells. 3. Brain capillaries are in contact with foot processes of astrocytes which essentially separate the capillaries from the neurones.

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by lipoflorida
Fri Jun 19, 2009 10:05 am
Forum: Physiology
Topic: blood brain barrier
Replies: 2
Views: 10598

Potency of Neurons and Glia

what types of brain cells are multipotent or pluripotent? it seems that radial glia and astrocytes have potential, but what evidence is out there concerning the capabilities of various neurons/glia?

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by jimmystang
Mon Jan 01, 2007 4:48 am
Forum: Physiology
Topic: Potency of Neurons and Glia
Replies: 0
Views: 2007

brain cancer

... cover the brain. They are Piameter, arachnoid and durameter. Schwann cells = also called Neurolemmocytes, part of the glial cells. (Protoplasmatic astrocytes, Fibrous astrocytes, Plasmatofibriller astrocytes, Oligodendrocytes, Microglia, Epyndemal cells, Schwann cells and friends.) Please refer ...

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by victor
Fri Aug 04, 2006 11:35 am
Forum: Human Biology
Topic: brain cancer
Replies: 17
Views: 6219
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