诊断和治疗微生物电路,适用于肠道炎症
Liana N Merk1, Andrey S Shur2, Smrutiti Jena3
1Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts 02138, United States.
ACS synthetic biology
|November 28, 2024
概括
工程细菌现在可以感知多个信号,用于精确的疾病治疗. 这项研究在益生菌细菌中开发了一个逻辑门,用于为炎症性肠病提供IL-22等治疗性细胞因子.
科学领域:
- 合成生物学 合成生物学
- 微生物组工程 微生物组工程
- 基因工程是一种基因工程.
背景情况:
- 工程微生物在人类微生物群中提供治疗和诊断潜力.
- 目前的局限性包括单个输入响应,阻碍了精度和有效性.
- 复杂的疾病,如炎症性肠病,需要多输入的微生物反应.
研究的目的:
- 为了设计一种益生菌大肠杆菌菌株Nissle 1917 (EcN) 具有 AND 逻辑门的多刺激反应.
- 允许基于特定的生物和外部信号的条件治疗交付.
- 为了证明治疗性细胞因子IL-22的分泌,用于潜在的炎症性肠病治疗.
主要方法:
- 在E.E.中实现一个分割激活器和逻辑门. 尼斯尔1917年大肠杆菌
- 作为双输入信号,利用了四酸盐 (炎症生物标志物) 和无水甲环素 (aTc).
- 使用化学反应网络模拟的AND门动态,并在参数调中执行.
- 设计了系统以通过血解素分泌途径分泌IL-22.
- 在人类肠道上皮的无细菌的transwell模型中验证了治疗性细胞因子的产生.
主要成果:
- 当两个信号都存在时,实现了AND门的4-6倍感应,泄漏最小.
- 在模型中确定了电路选择性的关键参数.
- 工程 EcN 成功分泌了IL-22,在体外引起与复合IL-22相似的宿主细胞因子反应.
- 在肠道上皮质环境中显示出最小的非目标效应.
结论:
- 开发了一种可扩展的工作流程,用于使用逻辑信号处理来设计细胞因子分泌的微生物.
- 成功创建了一个益生菌E. 这种大肠杆菌菌株能够感知并响应多个环境线索.
- 这种工程微生物证明了有针对性的IL-22输送的可行性,为炎症性肠病管理提供了一个有前途的战略.
关键词:
和逻辑门,以及逻辑门.抗炎性细胞因子IL-22是一种抗炎性细胞因子.基因工程细菌是一种基因工程细菌.没有细菌的Transwell模型.炎症性肠病是一种炎症性肠病.益生菌大肠杆菌 尼斯尔 1917 年更多相关视频
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