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Astrocyte activation and capillary remodeling in modified bilateral common carotid artery occlusion mice
Author(s) -
Song Jiangman,
Nan Di,
He Qihua,
Yang Lu,
Guo Huailian
Publication year - 2017
Publication title -
microcirculation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.793
H-Index - 83
eISSN - 1549-8719
pISSN - 1073-9688
DOI - 10.1111/micc.12366
Subject(s) - astrocyte , ischemia , common carotid artery , medicine , confocal , pathology , microvessel , angiogenesis , carotid arteries , central nervous system , geometry , mathematics
Objective The cerebral ischemia leads to brain dysfunction with neuron degeneration and responses from astrocytes and vessels. The aim of this study was to study the changes of astrocyte and microvessel in modified BCCAO mice. Methods Adult transgenic Tie2‐GFP mice were subjected to modified BCCAO operation and cranial window implantation. CBF and neurological injury were examined after ischemia. Astrocytes and vessels were investigated by two‐photon laser‐scanning microscope and confocal laser‐scanning microscope in vivo. Results The CBF decreased to approximately 40% of the baseline in the ischemic mice ( P <.05). The neuron damage was explicit after the cerebral ischemia ( P <.05), while no significant impairment of the motor and cognitive function was detected ( P >.05). The density of astrocyte and volume of the astrocyte soma was increased significantly after ischemia ( P <.01). Meanwhile, the mean distance between the penetrating artery and the nearest astrocyte soma decreased significantly ( P <.01). Besides, the increased diameter of capillary and change of vessel arrangement were observed. Conclusion The cerebral ischemia was successfully induced by this modified BCCAO model. Astrocyte activation and the capillary remodeling, including dilution of capillary and tortuosity, were observed in this model.