Nerve growth factor metabolic dysfunction contributes to sevoflurane-induced cholinergic degeneration and cognitive impairments

Nerve growth factor metabolic dysfunction contributes to sevoflurane-induced cholinergic degeneration and cognitive impairments
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神经生长因子代谢功能障碍导致七氟醚诱发的胆碱能变性和认知障碍

DOI:
10.1016/j.brainres.2018.11.033
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发表时间:
2019-03
期刊:
影响因子:
2.9
通讯作者:
Wang Zigao
Wang Zigao
中科院分区:
医学3区
文献类型:
--
作者:
Xiong Lu;Duan Lijie;Xu Wenqing;Wang Zigao

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七氟烷全身麻醉与术后认知功能障碍的发生率增加相关。既往研究表明,七氟烷麻醉可影响基底前脑胆碱能神经元(BFCN)的完整性和功能,而BFCN对学习和记忆至关重要。然而,其潜在机制在很大程度上仍然未知。在这里,我们证明,暴露于2.5%七氟烷诱导BFCN的显着损失,并导致空间和恐惧记忆的损害。此外,七氟烷暴露通过破坏其在大脑中的合成途径,显著降低了神经生长因子(NGF)的水平,这是BFCN存活和表型维持的重要因素。更重要的是,NGF给药不仅可以防止BFCN的丢失,还可以改善七氟醚治疗小鼠的认知障碍。我们的研究结果表明,神经生长因子代谢功能障碍有助于七氟烷相关的BFCN变性和随后的认知缺陷。
General anesthesia with sevoflurane is associated with an increased incidence of postoperative cognitive dysfunction. Previous studies have shown that sevoflurane anesthesia can affect the integrity and function of basal forebrain cholinergic neurons (BFCNs) which are essential for learning and memory. However, the underlying mechanisms remain largely unknown. Here, we demonstrated that exposure to 2.5% sevoflurane induced significant loss of BFCNs and caused impairments of the spatial and the fear memory. Further, sevoflurane exposure significantly reduced the level of nerve growth factor (NGF), an important factor for the survival and phenotype maintenance of BFCNs, by disrupting its synthesis pathways in the brain. More importantly, NGF administration not only prevented the loss of BFCNs but also ameliorated the cognitive impairments in sevoflurane-treated mice. Our findings indicate that NGF metabolic dysfunction contributes to sevoflurane-associated BFCNs degeneration and subsequent cognitive deficits.
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