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Molecular Neurobiology

, Volume 29, Issue 1, pp 61–71 | Cite as

Ion channels and amino acid transporters support the growth and invasion of primary brain tumors

  • Harald Sontheimer
Article

Abstract

The malignant growth of glial support cells causes gliomas, highly invasive, primary brain tumors that are largely resistant to therapy. Individual tumor cells spread by active cell migration, invading diffusely into the normal brain. This process is facilitated by Cl channels that endow glioma cells with an enhanced ability to quickly adjust their shape and cell volume to fit the narrow and tortuous extracellular brain spaces. Once satellite tumors enlarge, their growth is limited by the spatial constraints imposed by the bony cavity of the skull and spinal column. Glioma cells circumvent this limitation by active destruction of peritumoral neural tissue through the release of glutamate, inducing peritumoral seizures and ultimately excitotoxic neuronal cell death. Hence, primary brain tumors support their unusual biology by taking advantage of ion channels and transporters that are designed to support ion homeostatic functions in normal brain.

Index Entries

Glioma glutamate excitotoxicity chloride cell migration invasion metastasis cell volume ion channel 

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Copyright information

© Humana Press Inc. 2004

Authors and Affiliations

  • Harald Sontheimer
    • 1
  1. 1.Department of Neurobiology and Civitan International Research Centerthe University of Alabama at BirminghamBirmingham

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