Life Sci:反复接触七氟醚会损害老年雄性大鼠的学习能力和记忆

2017-12-11 李华宇 “罂粟花”微信号

危重病患者常需要反复手术干预,因此探讨反复接触麻醉药物对学习和记忆的影响就显得非常重要。七氟醚是一种广泛使用的吸入麻醉剂,对神经系统几乎没有副作用,并能使意识迅速恢复。但七氟醚暴露的长期影响和重复七氟醚暴露后对认知功能的影响却少有文献报道,这与现有的研究相矛盾。

背景与目的:危重病患者常需要反复手术干预,因此探讨反复接触麻醉药物对学习和记忆的影响就显得非常重要。七氟醚是一种广泛使用的吸入麻醉剂,对神经系统几乎没有副作用,并能使意识迅速恢复。但七氟醚暴露的长期影响和重复七氟醚暴露后对认知功能的影响却少有文献报道,这与现有的研究相矛盾。

方法:在本研究中,Morris水迷宫试验被用来研究单次(4小时)或重复(每天2小时连续5天)暴露于1.5%或2.5%七氟醚后对老年(16-18月龄)雄性大鼠学习能力和记忆的长期影响。测试是从最后一次暴露后1天到4周内进行。在海马中,通过对脑源性神经营养因子(BDNF),NF-κBmRNA和细胞凋亡率进行检验,以确定在单次或重复接触七氟醚后对认知功能和记忆的影响是否与细胞生化的改变有关。

结果:反复接触2.5%七氟醚降低了老年雄性大鼠海马的BDNF蛋白水平,提高了海马的NF-κBmRNA水平,增加了锥体细胞凋亡率。单次暴露于2.5%七氟醚以及反复接触1.5%或2.5%七氟醚显着损害了老年雄性大鼠的学习能力和记忆。

结论:反复接触七氟醚会损害老年雄性大鼠的学习能力和记忆,这种损伤伴随着海马内与认知功能相关的生化改变。

原始出处:

Guo S,et al.,Repeated exposure to sevoflurane impairs the learning and memory of older male rats.Life Sci. 2017 Nov 16. pii: S0024-3205(17)30602-1.

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    2018-07-31 clmlylxy
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    2017-12-11 wxl882001

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