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Neural precursor cells induce cell death in certain brain tumors
Date:7/23/2012

ndovanilloids) which are harmful to the cancer cells. However, in order to exert their lethal effect, the endovanilloids need the aid of a specific ion channel, the TRPV1 channel (transient receptor potential vanilloid type 1), also called the vanilloid receptor 1. TRPV1 is already known to researchers as a transducer of painful stimuli. It has, among other things, a binding site for capsaicin, the irritant of hot chili peppers, and is responsible for the hot sensation after eating them. Clinical trials are currently underway to develop new pain treatments by blocking or desensitizing this ion channel.

MDC researchers describe an additional role of the TRPV1 ion channel

In contrast to its use in pain management, this ion channel, which is located on the surface of glioblastoma cells and is much more abundant there than on normal glial cells, must be activated to trigger cell death in gliomas. The activated ion channel mediates stress-induced cell-death in tumor cells. If however TRPV1 is downregulated or blocked, the glioma cells are not destroyed. The MDC researchers are thus the first to identify neural precursor cells as the source of fatty acids that induce tumor cell death and to describe the role of the TRPV1 ion channel in the fight against gliomas.

However, the activity of neural precursor cells in the brain and thus of the body's own protective mechanism against gliomas diminishes with increasing age. This could explain why these tumors usually develop in older adults and not in children and young people. How can the natural protection of neural precursor cells be harnessed for older brains? According to the researchers, neural precursor cell therapy is not a solution. The benefit this obviously brings in the treatment of young people can have the opposite effect in older adults and may trigger brain tumors.

One possible treatment would be to use drugs to activate the TRPV1 channels. In mice, the group showed that a s
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Contact: bachtler@mdc-berlin.de
bachtler@mdc-berlin.de
49-309-406-3896
Helmholtz Association of German Research Centres
Source:Eurekalert

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