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Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or  immature dendritic cells. Non-professional phagocytes such as  epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes. 
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Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
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冲击诱导反应性微质中的食细胞缺陷.

Ruilin Yu1, Edmond A Rogers2,3,4, Palak Manchanda1

  • 1Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA.

bioRxiv : the preprint server for biology
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概括
此摘要是机器生成的。

这项研究引入了一个创伤性脑损伤 (TBI) 芯片模型. 该TBI芯片显示了减少的微质细胞消化和神经元功能受损,以及改变的脂质代谢,为神经炎症和神经退行提供了洞察力.

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科学领域:

  • 神经科学是一个神经科学.
  • 生物技术是生物技术.
  • 细胞生物学 细胞生物学

背景情况:

  • 创伤性脑损伤 (TBI) 在理解神经炎症和神经退行症方面存在重大挑战.
  • 在体外模型对于研究细胞对TBI的反应至关重要.
  • 脂质代谢与脑创伤和神经退行性疾病有关.

研究的目的:

  • 开发和利用TBI-on-a-chip模型来研究冲击后的分子和细胞变化.
  • 评估TBI对微质细胞和神经元功能的影响.
  • 分析TBI后细胞脂质组的变化.

主要方法:

  • 使用初级微质和神经网络开发TBI-on-a-chip模型.
  • 使用pH响应性粉样β (AβpH) 试验来测量微质细胞化.
  • 电生理学记录以评估神经元发射频率.
  • 从受影响细胞分泌的脂质的脂质分析.

主要成果:

  • 在TBI芯片模型中,微细胞化在撞击后7天显著减少.
  • 神经元在冲击后7天表现出粉样蛋白β摄取量增加和发射频率降低.
  • 观察到的显著变化是从sphingomyelin,glycerophospholipid和phosphatidylserine等级的脂类.

结论:

  • 芯片上的TBI模型有效地回顾了脑损伤后的关键细胞和分子变化.
  • 损坏的微质功能和神经元活动,加上改变的脂质代谢,是TBI的关键后果.
  • 这些发现突显了脂质代谢在TBI后神经炎症解决和神经退行病原发生中的作用.