Fetal exposure to high isoflurane concentration induces postnatal memory and learning deficits in rats

被引:50
作者
Kong, Fei-Juan [2 ]
Ma, Lei-Lei [3 ]
Hu, Wen-Wen [1 ]
Wang, Wen-Na [3 ]
Lu, Hui-Shun [1 ]
Chen, Shu-Ping [2 ]
机构
[1] Zhejiang Univ, Womens Hosp, Sch Med, Dept Anesthesiol, Hangzhou 310006, Zhejiang, Peoples R China
[2] First Peoples Hosp Hangzhou, Dept Anesthesiol, Hangzhou, Zhejiang, Peoples R China
[3] Zhejiang Univ, Affiliated Hosp 2, Sch Med, Dept Anesthesiol, Hangzhou 310006, Zhejiang, Peoples R China
关键词
Isoflurane; Fetal rats; Memory and learning deficits; Neuron apoptosis; Synaptic plasticity; SPATIAL MEMORY; ANESTHESIA; ACQUISITION; HALOTHANE; DAMAGE; TIME;
D O I
10.1016/j.bcp.2012.06.001
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
We developed a maternal fetal rat model to study the effects of isoflurane-induced neurotoxicity on the fetuses of pregnant rats exposed in utero. Pregnant rats at gestational day 14 were exposed to 1.3 or 3% isoflurane for 1 h. At postnatal day 28, spatial learning and memory of the offspring were examined using the Morris Water Maze. The apoptosis was evaluated by caspase-3 immunohistochemistry in the hippocampal CA1 region. Simultaneously, the ultrastructure changes of synapse in the hippocampal CA1 and dentate gyrus region were observed by transmission electron microscopy (TEM). The 3% isoflurane treatment group showed significantly longer escape latency, less time spent in the third quadrant and fewer original platform crossings in the Morris Water Maze test, significantly increased number and optical densities of caspase-3 neurons. This treatment also produced remarkable changes in synaptic ultrastructure compared with the control and the 1.3% isoflurane groups. There were no differences in the Morris Water Maze test, densities of caspase-3 positive cells, or synaptic ultrastructure between the control and 1.3% isoflurane groups. High isoflurane concentration (3%) exposure during pregnancy caused spatial memory and learning impairments and more neurodegeneration in the offspring rats compared with control or lower isoflurane concentrations. (C) 2012 Elsevier Inc. All rights reserved.
引用
收藏
页码:558 / 563
页数:6
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