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The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a...
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An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
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The inflammatory response is the body's defense against infection, injury, or irritation from bacteria, trauma, toxins, or heat. Inflammation helps locate and destroy pathogens and remove damaged tissue elements to heal the body. During this initial phase, fluid, blood products, and nutrients migrate to the injured area, resulting in redness, heat, swelling, ache, and loss of function. Moreover, signs of systemic inflammation include fever, increased WBC count, malaise, anorexia, nausea,...
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补充C3 / C3a-CCL9反循环编排炎症交叉声来加速大动脉解剖.

Xiaodan Zhong1, Yu Li1, Yang Xie2

  • 1Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030 Hubei, China; Hubei Provincial Engineering Research Center of Vascular Interventional Therapy, Wuhan 430030 Hubei, China.

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概括

一个新的C3/C3a-CCL9炎症反循环驱动大动脉解剖 (AD) 的进展. 在AD小鼠中,用CP40KK阻断C3激活减少了炎症,保持了大动脉完整性,并改善了生存率.

关键词:
动脉剖析是一个大动脉剖析.CCL9 CCL9 CCL9 的意思补充C3aa的情况巨细胞的招募血管光滑肌细胞 (VSMCs) 是一种

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科学领域:

  • 血管生物学 血管生物学
  • 免疫学 免疫学 免疫学
  • 补充系统 补充系统

背景情况:

  • 大动脉解剖 (AD) 涉及炎症和免疫细胞透.
  • 补充成分3 (C3) 和C3a在AD病变发生过程中的确切作用尚未完全理解.

研究的目的:

  • 调查C3/C3a的作用,并确定AD的下游效应因素.
  • 探索血管光滑肌细胞 (VSMC) 中C3a介导的信号传递及其对巨细胞招募的影响.
  • 评估C3抑制在AD中的治疗潜力.

主要方法:

  • 在人类和小鼠的AD样本中量化C3/C3a.
  • 宏细胞枯竭研究以确定C3a来源.
  • 对C3a刺激的VSMC进行转录基因分析.
  • 在体内研究使用AD小鼠模型治疗C3抑制剂 (CP40KK).

主要成果:

  • 在阿尔茨海默病患者和小鼠中发现C3a升高,但C3没有升高,主要来自巨细胞.
  • C3a刺激诱导了VSMC表型切换和CCL9分泌,通过C3aR和CCR1.1招募巨细胞.
  • 通过促进巨细胞招募和C3合成,CCL9放大了炎症反应,创造了一个积极的反循环.
  • 在AD小鼠中,CP40KK治疗减弱了C3a和CCL9,减少了巨细胞透,保持了大动脉完整性,并改善了生存率.

结论:

  • 一个C3/C3a-CCL9反循环是AD进展的关键驱动因素.
  • 在AD中,VSMCs充当血管炎症的活性调节者.
  • C3a和CCL9是AD干预的潜在治疗点.