Cognitive Impairment and Endoplasmic Reticulum Stress Induced by Repeated Short-Term Sevoflurane Exposure in Early Life of Rats.

Cognitive Impairment and Endoplasmic Reticulum Stress Induced by Repeated Short-Term Sevoflurane Exposure in Early Life of Rats.
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大鼠生命早期反复短期七氟醚暴露引起的认知障碍和内质网应激

DOI:
10.3389/fpsyt.2018.00332
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发表时间:
2018
影响因子:
4.7
通讯作者:
Liu ZQ
Liu ZQ
中科院分区:
医学3区
文献类型:
--
作者:
Shen FY;Song YC;Guo F;Xu ZD;Li Q;Zhang B;Ma YQ;Zhang YQ;Lin R;Li Y;Liu ZQ

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七氟醚是儿童最常用的挥发性麻醉剂之一,但七氟醚在婴儿或儿童中长期或重复临床使用的安全性存在争议。在这里,我们调查了七氟醚对早期大鼠的影响以及这些影响的时间尺度。我们的行为学结果表明,新生大鼠反复短期暴露于七氟醚会导致学习和记忆障碍,而单次暴露于七氟醚是相对安全的。进一步的机制研究表明,重复七氟醚暴露可损害长时程增强(LTP),下调某些突触发生相关蛋白(GluR1、PSD95)的表达,并上调与内质网(ER)应激相关的蛋白表达。内质网应激抑制剂牛磺酸(TUDCA)逆转了突触可塑性蛋白水平的变化。我们的结果为临床对重复七氟醚麻醉的关注提供了新的证据。
Sevoflurane is one of the most commonly used volatile anaesthetics for children, but the safety of prolonged or repeated clinical use of sevoflurane in infants or children is controversial. Here, we investigated the effects of sevoflurane on rats in early life and the time scale of those effects. Our behavioral results indicated that repeated short-term exposure of new-born rats to sevoflurane caused learning and memory impairment, while a single exposure of rats to sevoflurane was relatively safe. Further mechanistic investigation revealed that repeated sevoflurane exposure impaired long-term potentiation (LTP), downregulated the expression of certain synaptogenesis-related proteins (GluR1, PSD95) and upregulated proteins related to endoplasmic reticulum (ER) stress in the hippocampus. An ER stress inhibitor, tauroursodeoxycholic acid (TUDCA), reversed the changes in the levels of synaptic plasticity proteins. Our results provide new evidence for the clinical concerns regarding repeated sevoflurane anesthesia.
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