|星空彩票电脑版
%A WANG Wei-ling，YANG Bao-xue %T
Involvement of Water Channel Aquaporin 4 in the Nervous Disorders%0 Journal Article %D 2012 %J ACTA NEUROPHARMACOLOGICA %R %P 20-27 %V 2 %N 1 %U {http://actanp.hebeinu.edu.cn/CN/abstract/article_69.shtml} %8 2012-02-26 %X The aquaporins (AQP) are a family of water-transporting proteins. Aquaporin4 (AQP4) is expressed in astrocytes throughout the central nervous system, as well as in Müller cells in the retina, Claudius/Hensen cells in the inner ear and olfactory epithelial cells. There are two AQP4 isoforms, M1 and M23， produced by alternative splicing. M23 AQP4 forms heterotetramers that assemble in the cell membrane in supramolecular structures called orthogonal arrays of particles (OAP). Phenotype analysis of AQP4-null mice indicates the involvement of AQP4 in brain and spinal cord water balance, astrocyte migration, neural signal transduction and neuroinflammation. AQP4-null mice manifest reduced brain swelling in cytotoxic cerebral edema, but increased brain swelling in vasogenic edema and hydrocephalus. AQP4 deficiency increases seizure duration. AQP4 is also involved in the neuroin?ammatory demyelinating disease neuromyelitis optica, where autoantibodies (NMO-IgG) targeting AQP4 produce astrocyte damage and in?ammation. This review summarizes the effect and possible mechanism of AQP4 in nervous system diseases, such as epilepsy, edema and neuromyelitis optica.