偏头痛突变通过促进缺血性脱极化来增加中风的脆弱性
Katharina Eikermann-Haerter1, Jeong Hyun Lee, Izumi Yuzawa
1Stroke and Neurovascular Regulation Laboratory, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
Circulation
|December 7, 2011
概括
家族性半性偏头痛 (FHM) 突变通过使大脑更容易受到缺血事件的影响,增加中风风险. 这种对大脑脱极化的敏感性增加导致更大的中风和更糟糕的结果.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 脑卒中研究 脑卒中研究
背景情况:
- 偏头痛是已知的中风风险因素,但潜在的机制尚不清楚.
- 由于共同的特征和机制,家族性半性偏头痛 (FHM) 作为常见偏头痛的有价值模型.
- FHM与中风风险增加有关.
研究的目的:
- 研究FHM型1 (FHM1) 突变对大脑易受缺血性中风的影响.
- 阐明将FHM与中风风险联系起来的细胞和生理机制.
主要方法:
- 使用了两个FHM1突变小鼠菌株和野生类型的对照.
- 通过无氧脱极化和近心脏梗塞脱极化评估大脑活动.
- 使用扩散权重MRI和激光斑点流量计量量化心脏病发作大小和神经结果.
- 研究了一种谷氨酸受体对抗剂的作用.
主要成果:
- 在突变小鼠中,FHM1突变导致了较早的无氧脱极化和更频繁的近心梗塞脱极化.
- 突变小鼠表现出快速的心脏病核心扩张和更大的 perfusion 缺陷.
- 突变小鼠需要更高的脑血流才能生存,导致轻度缺血性心脏病发作.
- 突变小鼠患有更大的心脏病发作和更糟糕的神经结果,这些结果通过谷氨酸受体对抗剂治疗而减少.
结论:
- 增加对缺血性脱极化的易感性,类似于扩散性抑郁症,使偏头痛患者在轻度缺血性事件期间容易发作.
- 这种机制有助于在偏头痛患者中观察到的中风风险增加.
- 向谷氨基胺基机制可能为易受影响的个体预防中风提供治疗潜力.
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