血原激活剂抑制剂-1调解大脑缺血诱导的星球细胞反应性
Pavel Yanev1, Cynthia Martin-Jimenez1, Diego Julian Vesga-Jimenez1
1Division of Neuropharmacology and Neurologic Diseases, Emory Primate Research Center, Atlanta, GA, USA.
概括
血原激活剂抑制剂-1 (PAI-1) 在缺血性中风后由星球细胞释放会加剧大脑损伤. 在小鼠中降低PAI-1水平降低了脑病变体积和在康复期间的星球细胞反应性.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 病理学 病理学 病理学
背景情况:
- 缺血症会提高等离子体激活剂抑制剂-1 (PAI-1) 水平,但其细胞起源和缺血性大脑中的功能尚未完全理解.
- 在受缺血影响的大脑区域观察到反应性星球细胞.
研究的目的:
- 调查PAI-1在缺血性脑损伤背景下的来源和作用.
- 确定PAI-1对脑细胞反应性和脑缺血后病变体积的影响.
主要方法:
- 在小鼠模型和黑猩猩中风病例中使用免疫组织化学在星体细胞中检测PAI-1.
- 在白血病后24小时和72小时,对野生型,PAI-1缺乏 (PAI-1-/-),PAI-1过度表达 (PAI-1Tg) 的小鼠的星球细胞反应和病变体积的分析.
- 免疫洗和碎形分析以评估PAI-1和质纤维酸性蛋白质 (GFAP) 的丰度和星体形态.
主要成果:
- 在周围缺血病区域中发现了具有天体细胞形态的PAI-1免疫反应细胞.
- 在缺血症后24小时,基因型之间没有观察到星细胞反应性或病变体积的显著差异.
- 在72小时后,PAI-1-/-小鼠的天体细胞反应和病变体积降低,而PAI-1Tg小鼠的反应和病变大小增加.
- 在恢复阶段,星细胞PAI-1水平与GFAP增加和反应性星细胞形态相关.
结论:
- 星球细胞是缺血大脑中PAI-1的重要来源.
- 天体细胞PAI-1在恢复阶段起着不利的作用,促进星结裂并加剧死核扩张.
- 向星系PAI-1可能为减轻中风后脑损伤提供治疗策略.
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