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: 5905

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: 1034

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: 11057

How can I isolate adult stem cells from circulation.

... until the 1990s that scientists agreed that the adult brain does contain stem cells that are able to generate the brain's three major cell types—astrocytes and oligodendrocytes, which are non-neuronal cells, and neurons, or nerve cells. A. Where are adult stem cells found and what do they normally ...

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by biolearner
Mon May 19, 2008 10:07 pm
Forum: Cell Biology
Topic: How can I isolate adult stem cells from circulation.
Replies: 1
Views: 7915

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: 2124
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