Characterization of a recovery global cerebral ischemia model in the mouse

被引:56
作者
Sheng, HX
Laskowitz, DT
Pearlstein, RD
Warner, DS [1 ]
机构
[1] Duke Univ, Med Ctr, Dept Anesthesiol, Durham, NC 27710 USA
[2] Duke Univ, Med Ctr, Dept Med Neurol, Durham, NC 27710 USA
[3] Duke Univ, Med Ctr, Dept Surg, Durham, NC 27710 USA
关键词
brain; ischemia; global; mouse; recovery; histology; neurology; blood flow;
D O I
10.1016/S0165-0270(99)00018-7
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Transgenic/knockout murine variants allow roles of specific proteins to be studied in cerebral ischemia. Because of the size of mice, however, study of prolonged recovery from global ischemia has been limited. This project characterized an adaptation of the rat two-vessel occlusion model of global ischemia for use in the mouse. C57B1/6J mice (8 weeks old; 21 +/- 1 g) were overnight fasted, anesthetized with halothane, intubated and mechanically ventilated. The right internal jugular vein and femoral artery were cannulated. Pericranial temperature was held at 37.0 degrees C, The carotid arteries were occluded and mean arterial pressure was reduced to 35 mmHg with 0.3 mg intra-arterial trimethaphan and venous exsanguination. Electroencephalographic isoelectricity was confirmed in cohort mice. Ten minutes later ischemia was reversed. Mice were allowed 1, 3 or 5 days survival followed by histologic analysis. Regional cerebral blood flow (CBF) was determined autoradiographically. Outcome effects of intra-ischemic hyperglycemia (approximate to 350 mg/dl) or hypothermia (34 degrees C) were also examined. The mortality rate was less than 10% in all recovery groups. Ischemia caused reduction of CBF to < 2% of sham values in cortex, hippocampus, and caudoputamen. CBF was unchanged in thalamus, brainstem and cerebellum. CAl damage, greater after 3 days vs. 1 day reperfusion, was not further increased at 5 days. Histologic injury was increased by hyperglycemia although seizures did not occur. Hypothermia reduced CAI damage. This study demonstrates feasibility of using the two-vessel occlusion + hypotension recovery model in the mouse. Recovery intervals of greater than or equal to 3 days are required to account for delayed CAl neuronal necrosis. Histologic outcome can be modulated by known physiologic determinants of ischemic brain damage. (C) 1999 Elsevier Science B.V. All rights reserved.
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收藏
页码:103 / 109
页数:7
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