Neuroprotection on ischemic brain injury by Mg2+/H2 released from endovascular Mg implant

作者：Yang Zhang, Hongkang Zhang, Miaowen Jiang, Xiaofeng Cao, Xiaoxiao Ge, Baoying Song, Jing Lan, Wenhao Zhou, Zhengfei Qi, Xuenan Gu, Juzhe Liu, Yufeng Zheng, Ming Li, Xunming Ji · 发表于：Bioactive Materials · 年份：2024 · DOI：10.1016/j.bioactmat.2024.08.019 · 被引用次数：11 · 研究领域：Magnesium Alloys: Properties and Applications、Magnesium Oxide Properties and Applications、Bone Tissue Engineering Materials

Most acute ischemic stroke patients with large vessel occlusion require stent implantation for complete recanalization. Yet, due to ischemia-reperfusion injury, over half of these patients still experience poor prognoses. Thus, neuroprotective treatment is imperative to alleviate the ischemic brain injury, and a proof-of-concept study was conducted on “biodegradable neuroprotective stent”. This concept is premised on the hypothesis that locally released Mg 2+ /H 2 from Mg metal within the bloodstream could offer synergistic neuroprotection against reperfusion injury in distant cerebral ischemic tissues. Initially, the study evaluated pure Mg's neuroactive potential using oxygen-glucose deprivation/reoxygenation (OGD/R) injured neuron cells. Subsequently, a pure Mg wire was implanted into the common carotid artery of the transient middle cerebral artery occlusion (MCAO) rat model to simulate human brain ischemia/reperfusion injury. In vitro analyses revealed that pure Mg extract aided mouse hippocampal neuronal cell (HT-22) in defending against OGD/R injury. Additionally, the protective effects of the Mg wire on behavioral abnormalities, neural injury, blood-brain barrier disruption, and cerebral blood flow reduction in MCAO rats were verified. Conclusively, Mg-based biodegradable neuroprotective implants could serve as an effective local Mg 2+ /H 2 delivery system for treating distant cerebral ischemic diseases. • First proof-of-concept study on “Biodegradable neuroprotective...