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镁是人体内必需的微量元素之一, 它除了具有维持细胞膜完整性的功能外, 还是许多酶反应所必需的元素。近年来的研究证明, Mg2+是目前综合性评价前景较好的神经保护剂, 及时补充镁剂不仅能减轻创伤引起的脑组织损伤, 而且对急性缺血缺氧性脑病、急性代谢性脑功能障碍及一些锥体外系疾病如Wilson病等, 均起到明显的神经保护作用, 并可明显改善其预后, 对放射性脑损伤同样可起到显著的脑保护作用[1-2]。
镁离子对放射性脑损伤的脑保护作用
Brain protection by magnesium ion against radioaction brain injury
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摘要: 放射性脑损伤是脑部肿瘤放射治疗的严重并发症之一,近几年对Mg2+的研究证明了其在脑损伤中的保护作用,是目前综合性评价前景较好的神经保护剂。该文综述了放射性脑损伤后脑组织中的Mg2+变化情况及产生原因,并从减轻炎性反应、减轻脑水肿,抑制脂质过氧化、抗细胞凋亡,改善神经功能等方面分析了Mg2+对放射性脑损伤的保护机制。Abstract: Radiation brain injury is a serious complication among the radiotherapy of brain tumors. It is demonstrated that the protective action of magnesium ion in the brain injury from some experimental studies recent years, which is the prospective neuroprotective agents overall merits.This article is summarized the causes and the variance of magnesium ion in the brain tissue afterwards the radioactive brain injury, additionally the defense mechanism of magnesium ion from the aspects of inflammation reduction, encephaledema alleviation, anti-apoptosis and improcement of nerve function.
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Key words:
- Brain injury /
- Magnesium sulfate /
- Radiation protection
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