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相关概念视频

Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

695
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and...
695

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相关实验视频

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工程外膜囊泡用于抗原传递:辅助活性和系统反应性探索性研究.

Lu Lu1, Lina Zhai2, Qikun Ou3

  • 1Laboratory of Advanced Biotechnology, Beijing Institute of Biotechnology, 20 Dongda Street, Beijing 100071, China.

Vaccines
|June 27, 2025
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概括
此摘要是机器生成的。

来自工程细菌的排毒外膜囊泡 (OMV) 显示出作为疫苗载体的希望,提供高产量和辅助性质. 然而,需要进一步优化,以解决剂量依赖性毒性,以开发安全的疫苗.

关键词:
沙门氏菌进入的血清 Typhimurium 类型.一个辅助的辅助者.生物相容性 生物相容性在外膜囊泡中,外膜囊泡

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科学领域:

  • 细菌学 细菌学是一门学科.
  • 疫苗学 疫苗学 疫苗学
  • 纳米技术 纳米技术

背景情况:

  • 外膜囊泡 (OMVs) 是具有固有的免疫性的细菌纳米粒子,使它们成为有吸引力的疫苗载体.
  • 关于OMV相关毒性的系统评估有限,这阻碍了它们的临床转化.
  • 由于它们的自我辅助性质,来自格拉姆阴性细菌的OMVs具有潜在的潜力.

研究的目的:

  • 开发和评估从工程细菌作为疫苗载体的排毒外膜囊泡 (OMVs).
  • 评估这些修改后的OMV的安全性和辅助疗效.
  • 调查与野生类型相比,排毒的OMV的产量和免疫性.

主要方法:

  • CRISPR/Cas9对*Salmonella enterica*血清 Typhimurium进行工程,以创建一个*ΔmsbB*突变体,以提高OMV的产量.
  • 用排毒的OMV (Mut4_OMV) 给BALB/c小鼠进行皮下免疫,以评估*Yersinia pestis*和*Bacillus anthracis*抗原的安全性和辅助疗效.
  • 对剂量依赖性毒性,生存率和免疫反应 (抗体标位,T细胞反应) 的评估.

主要成果:

  • 与野生型OMV相比,工程细菌产生了排毒的OMV (Mut4_OMV),蛋白质产量增加了9倍.
  • 虽然野生型OMV是致命的,但Mut4_OMV在小鼠中显示出100%的存活率.
  • 观察到剂量依赖性毒性,包括外骨膜造血和胀,尽管具有强烈的辅助活性,并诱导与辅助剂相比的抗原特异性抗体和T细胞反应.

结论:

  • 解毒的OMV具有显著的潜力,可以作为具有强大的辅助能力的疫苗载体.
  • 在特定器官中的残留剂量依赖性毒性需要进一步优化生物相容性.
  • 需要进一步的研究,以提高OMV的安全性,以便广泛应用疫苗.