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Loss of perivascular aquaporin 4 may underlie deficient water and K+ homeostasis in the human epileptogenic hippocampus
(National Academy of Sciences, 2005-01-25)
An abnormal accumulation of extracellular K+ in the brain has been implicated in the generation of seizures in patients with mesial temporal lobe epilepsy (MTLE) and hippocampal sclerosis. Experimental studies have shown ...
Syntrophin-dependent expression and localization of Aquaporin-4 water channel protein
(National Academy of Sciences, 2001-11-20)
The Aquaporin-4 (AQP4) water channel contributes to brain water homeostasis in perivascular astrocyte endfeet where it is concentrated. We postulated that AQP4 is tethered at this site by binding of the AQP4 C terminus to ...
Specialized membrane domains for water transport in glial cells: high resolution immunogold cytochemistry of aquaporin-4 in rat brain
(Copyright held by the original publisher: Journal of Neuroscience, 1997-01-01)
Membrane water transport is critically involved in brain volume homeostasis and in the pathogenesis of brain edema. The cDNA encoding aquaporin-4 (AQP4) water channel protein was recently isolated from rat brain. We used ...
Delayed K+ clearance associated with aquaporin-4 mislocalization: Phenotypic defects in brains of α-syntrophin-null mice
(National Academy of Sciences, 2003-11-11)
Recovery from neuronal activation requires rapid clearance of potassium ions (K+) and restoration of osmotic equilibrium. The predominant water channel protein in brain, aquaporin-4 (AQP4), is concentrated in the astrocyte ...
An alpha-syntrophin-dependent pool of AQP4 in astroglial end-feet confers bidirectional water flow between blood and brain
(National Academy of Sciences, 2003-02-18)
The water channel AQP4 is concentrated in perivascular and subpial membrane domains of brain astrocytes. These membranes form the interface between the neuropil and extracerebral liquid spaces. AQP4 is anchored at these ...
Temporary loss of perivascular aquaporin-4 in neocortex after transient middle cerebral artery occlusion in mice
(National Academy of Sciences, 2006-09-05)
The aquaporin-4 (AQP4) pool in the perivascular astrocyte membranes has been shown to be critically involved in the formation and dissolution of brain edema. Cerebral edema is a major cause of morbidity and mortality in ...