National Laboratory Astana, Nazarbayev University, 53 Kabanbay batyr Ave., Astana, 010000, Kazakhstan.
National Laboratory Astana, Nazarbayev University, 53 Kabanbay batyr Ave., Astana, 010000, Kazakhstan; S.D. Asfendiyarov Kazakh National Medical University, Tole Bi Street 94, Almaty, 050000, Kazakhstan.
Neuroscience. 2019 Jun 1;408:46-57. doi: 10.1016/j.neuroscience.2019.03.058. Epub 2019 Apr 3.
Amyloid beta peptide (Aβ) is implicated in the development of pathological reactions associated with Alzheimer's disease (AD), such as oxidative stress, neuro-inflammation and death of brain cells. Current pharmacological approaches to treat AD are not able to control the deposition of Aβ and suppression of Aβ-induced cellular response. There is a growing body of evidence that exposure to radiofrequency electromagnetic field (RF-EMF) causes a decrease of beta-amyloid deposition in the brains and provides cognitive benefits to Alzheimer's Tg mice. Herein, we investigated the effects of mobile phone radiofrequency EMF of 918 MHz on reactive oxygen species (ROS) formation, mitochondrial membrane potential (MMP), activity of NADPH-oxidase, and phosphorylation of p38MAPK and ERK1/2 kinases in human and rat primary astrocytes in the presence of Aβ and HO. Our data demonstrate that EMF is able to reduce Aβ- and HO-induced cellular ROS, abrogate Aβ₄₂-induced production of mitochondrial ROS and the co-localization between the cytosolic (p47-phox) and membrane (gp91-phox) subunits of NADPH oxidase, while increasing MMP, and inhibiting HO-induced phosphorylation of p38MAPK and ERK1/2 in primary astrocytes. Yet, EMF was not able to modulate alterations in the phosphorylation state of the MAPKs triggered by Aβ. Our findings provide an insight into the mechanisms of cellular and molecular responses of astrocytes on RF-EMF exposure and indicate the therapeutic potential of RF-EMF for the treatment of Alzheimer's disease.
淀粉样β肽 (Aβ) 与阿尔茨海默病 (AD) 相关的病理反应的发展有关,如氧化应激、神经炎症和脑细胞死亡。目前治疗 AD 的药物方法不能控制 Aβ的沉积和抑制 Aβ诱导的细胞反应。越来越多的证据表明,暴露于射频电磁场 (RF-EMF) 会导致大脑中β-淀粉样蛋白沉积减少,并为阿尔茨海默病 Tg 小鼠提供认知益处。在此,我们研究了 918 MHz 手机射频 EMF 对 Aβ和 HO 存在下人源和大鼠原代星形胶质细胞中活性氧 (ROS) 形成、线粒体膜电位 (MMP)、NADPH 氧化酶活性以及 p38MAPK 和 ERK1/2 激酶磷酸化的影响。我们的数据表明,EMF 能够减少 Aβ 和 HO 诱导的细胞 ROS,阻止 Aβ₄₂ 诱导的线粒体 ROS 产生以及 NADPH 氧化酶胞质 (p47-phox) 和膜 (gp91-phox) 亚基之间的共定位,同时增加 MMP,并抑制 HO 诱导的原代星形胶质细胞中 p38MAPK 和 ERK1/2 的磷酸化。然而,EMF 不能调节 Aβ 触发的 MAPKs 磷酸化状态的改变。我们的研究结果深入了解了星形胶质细胞对 RF-EMF 暴露的细胞和分子反应的机制,并表明 RF-EMF 治疗阿尔茨海默病的治疗潜力。
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