Sci. STKE, 16 May 2006
NEUROBIOLOGY Stroke, Ischemia, and Ion Flux
The rapid decrease of oxygen and glucose in brain tissue after an acute stroke can trigger necrotic neuronal cell death within minutes. The main underlying cause is the dysregulation of major intracellular ion concentrations, but it has been unclear which particular ion channels are activated by ischemic conditions in pyramidal neurons. Pannexin 1 (Px1) is a member of a family of gap junction proteins that are highly expressed in pyramidal neurons. In acutely isolated neurons and brain slices, Thompson et al. found that Px1 hemichannel opening was activated by ischemic stress. Thus, hemichannel activation by ischemia during stroke could be responsible for the profound ionic dysregulation contributing to excitotoxicity.
Citation: Stroke, Ischemia, and Ion Flux. Sci. STKE 2006, tw167 (2006).
Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882