Aquaporin-4 deficiency attenuates acute lesions but aggravates delayed lesions and microgliosis after cryoinjury to mouse brain  

作　　者：Wen-Zhen Shi Chun-Zhen Zhao Bing Zhao Xiao-Liang Zheng San-Hua Fang Yun-Bi Lu Wei-Ping Zhang Zhong Chen Er-Qing Wei 

机构地区：[1]Department of Pharmacology and Institute of Neurobiology, School of Medicine, Zhejiang University, Hangzhou 310058,China

出　　处：《Neuroscience Bulletin》2012年第1期61-68,共8页神经科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China (81072618,30772561,30873053 and 30672449);the Natural Science Foundation of Zhejiang Province,China (Y2090069);the "Qian Jiang Ren Cai Research Plan" Zhejiang Province,China (2010R10055);Fundamental Research Funds for the Central Universities of China (2009QNA7008)

摘　　要：Objective To determine whether aquaporin-4 （AQP4） regulates acute lesions, delayed lesions, and the associated microglial activation after cryoinjury to the brain. Methods Brain cryoinjury was applied to AQP4 knockout （KO） and wild-type mice. At 24 h and on days 7 and 14 after cryoinjury, lesion volume, neuronal loss, and densities of microglia and astrocytes were determined, and their changes were compared between AQP4 KO and wild-type mice. Results Lesion volume and neuronal loss in AQP4 KO mice were milder at 24 h following cryoinjury, but worsened on days 7 and 14, compared to those in wild-type mice. Besides, microglial density increased more, and astrocyte proliferation and glial scar formation were attenuated on days 7 and 14 in AQP4 KO mice. Conclusion AQP4 deficiency ameliorates acute lesions, but worsens delayed lesions, perhaps due to the microgliosis in the late phase.Objective To determine whether aquaporin-4 （AQP4） regulates acute lesions, delayed lesions, and the associated microglial activation after cryoinjury to the brain. Methods Brain cryoinjury was applied to AQP4 knockout （KO） and wild-type mice. At 24 h and on days 7 and 14 after cryoinjury, lesion volume, neuronal loss, and densities of microglia and astrocytes were determined, and their changes were compared between AQP4 KO and wild-type mice. Results Lesion volume and neuronal loss in AQP4 KO mice were milder at 24 h following cryoinjury, but worsened on days 7 and 14, compared to those in wild-type mice. Besides, microglial density increased more, and astrocyte proliferation and glial scar formation were attenuated on days 7 and 14 in AQP4 KO mice. Conclusion AQP4 deficiency ameliorates acute lesions, but worsens delayed lesions, perhaps due to the microgliosis in the late phase.

关 键 词：AQUAPORIN-4 gene deficiency CRYOINJURY microglia ASTROCYTE 

分 类 号：Q51[生物学—生物化学] TP24[自动化与计算机技术—检测技术与自动化装置]