鼻咽腔降温对大鼠全脑缺血-再灌注损伤的保护作用

被引:5
作者
姚文瑜 [1 ]
张山 [1 ]
熊渤辉 [2 ]
姚淑萍 [1 ]
张志强 [1 ]
机构
[1] 河北医科大学第二医院麻醉科
[2] 唐山市眼科医院
关键词
鼻咽腔降温; 再灌注损伤; 微透析; Bcl-2; Bax;
D O I
暂无
中图分类号
R741 [神经病学];
学科分类号
摘要
目的探讨鼻咽腔降温对大鼠全脑缺血-再灌注损伤的保护作用。方法健康雄性Wistar大鼠18只,随机均分为三组:全身降温组(A组)、鼻咽腔降温组(B组)、常温组(C组)。采用Pulsinelli四血管阻断法建立大鼠全脑缺血-再灌注损伤模型。A、B组海马温度降至靶温度33℃,阻断双侧颈总动脉20min再灌注,低温维持1h后复温。C组保持大鼠直肠和海马温度均为(37±0.5)℃,阻断双侧颈总动脉20min再灌注。利用微透析技术收集大鼠海马CA1区微透析液并测其谷氨酸(Glu)含量。再灌注8h后断头取脑,用免疫组化法观察海马CA1区Bcl-2和Bax的表达。结果 A组海马温度从37℃降到33℃所需时间为B组的4.8倍;缺血10、20min、再灌注后10、20、30min时A、B组Glu含量明显低于C组(P<0.05);A、B、C组海马CA1区Glu含量恢复至缺血前水平所需时间分别为(19.92±1.30)、(20.17±1.34)、(39.67±1.49)min。与C组比较,A、B组的Bax免疫阳性细胞数显著减少(P<0.05);A、B组的Bcl-2免疫阳性细胞数显著增多(P<0.05)。结论鼻咽腔降温对大鼠全脑缺血-再灌注损伤具有保护作用,且鼻咽腔降温法降低海马温度的速度明显快于全身降温法。
引用
收藏
页码:178 / 181
页数:4
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