1.&2.amp;3.lt;4.sup&5.gt;6.河北工业大学生命科学与健康工程学院&7./sup&8.<9.sup>10.河北工业大学生命科学与健康工程学院<11./sup>
国家自然科学基金项目(NO. 52077057,52207251)和河北省自然科学基金项目(NO. F2022202023)。
Hebei University of Technology
The National Natural Science Foundation of China (NO. 52077057,52207251) and Hebei Natural Science Foundation (NO. F2022202023).
目的 重复经颅磁刺激(repetitive Transcranial Magnetic Stimulation, rTMS)是一种非侵入性脑刺激技术,为治疗阿尔茨海默病(Alzheimer's disease,AD)提供了一种非药物方法。研究表明铁死亡可促进阿尔茨海默病的病理发生和发展,而抑制神经元铁死亡可有效改善AD的认知障碍。钙离子(Ca2+)稳态失衡与AD的病理密切相关,并可通过多种途径驱动铁死亡的发生。本研究旨在探讨rTMS是否通过抑制神经元铁死亡或者维持钙稳态来改善AD小鼠认知障碍,从而为rTMS在治疗阿尔茨海默病中的应用奠定理论和实验基础。方法 APP/PS1 AD小鼠分别经过0.5Hz低频和20Hz高频rTMS处理,通过新物体识别和水迷宫实验评估治疗结果。利用ELISA方法测定各组小鼠海马体中谷胱甘肽(GSH)、丙二醛(MDA)、超氧化物歧化酶(SOD)、Fe2+的水平。使用Erastin诱导HT-22细胞铁死亡,经过高低频磁刺激治疗后,CCK8检测其细胞活性,Fluo-4 AM检测其胞内钙离子浓度变化。结果 结果表明与正常小鼠相比,AD小鼠表现出显著的认知能力下降,同时铁死亡水平和胞内钙离子浓度显著升高。高频和低频rTMS治疗都能够显著改善AD小鼠认知障碍,并且能够抑制AD小鼠神经元铁死亡和胞内钙离子异常增加。结论 本研究表明,高频和低频重复经颅磁刺激都能够有效改善AD小鼠认知功能障碍,这种改善可能是通过改善铁死亡或细胞内钙离子失衡来实现的。
Objective Repetitive transcranial magnetic stimulation (rTMS), a non-invasive brain stimulation technique, offers a non-pharmacological therapeutic option for the management of Alzheimer's disease (AD). Studies have demonstrated that ferroptosis plays a pivotal role in the pathological onset and progression of AD, and the inhibition of neuronal ferroptosis can significantly ameliorate cognitive impairments associated with AD. The imbalance of calcium ion (Ca2+) homeostasis is intimately associated with the pathology of AD and serves as a catalyst for the induction of ferroptosis through various pathways. This study is designed to investigate whether rTMS can ameliorate Alzheimer's disease by inhibiting neuronal ferroptosis or maintaining calcium homeostasis, ultimately establishing a theoretical and experimental framework for the utilization of rTMS in AD treatment. Methods In the Methods section, APP/PS1 AD mice were subjected to both 0.5 Hz low-frequency and 20 Hz high-frequency rTMS treatments, and the efficacy of these treatments was evaluated using novel object recognition and Morris water maze tests. ELISA was employed to quantify the levels of glutathione (GSH), malondialdehyde (MDA), superoxide dismutase (SOD), Fe2+ within the hippocampi of mice from each group. HT-22 cells were induced to undergo ferroptosis via Erastin treatment, and subsequent to high- and low-frequency magnetic stimulation, cell viability was assessed using the CCK8 assay, while intracellular calcium ion concentration fluctuations were monitored using Fluo-4 AM. Results: The findings revealed that, when compared to normal mice, AD mice displayed a notable decline in cognitive function, accompanied by a substantial increase in ferroptosis levels and intracellular calcium ion concentrations. Both high-frequency and low-frequency applications of rTMS were found to significantly ameliorate cognitive impairments in AD mice, while also effectively mitigating the abnormal augmentation of neuronal ferroptosis and intracellular calcium ion levels. Conclusion: The present study underscores that both high-frequency and low-frequency repetitive transcranial magnetic stimulation (rTMS) exhibit efficacy in alleviating cognitive dysfunction in AD mice, potentially through the modulation of ferroptosis and intracellular calcium ion homeostasis.
张蒙,Chong,付蕊,任子豪,丁冲.重复经颅磁刺激通过影响神经元铁死亡和钙稳态改善AD小鼠认知功能[J].生物化学与生物物理进展,,():
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