一个 Bacteroides 合成生物学工具包来构建一个 in vivo 吸收不良的生物传感器
Giselle McCallum1, Juan C Burckhardt1, Jerry He1
1Department of Microbiology & Immunology, University of British Columbia, Vancouver, BC, Canada.
Cell
|January 29, 2026
概括
研究人员将肠道细菌 Bacteroides thetaiotaomicron 改造为生物传感器,以检测肠道度的变化. 这一突破使得肠道健康和吸收不良条件的非侵入性监测成为可能.
科学领域:
- 微生物学 微生物学
- 合成生物学 合成生物学
- 胃肠病学 胃肠病学
背景情况:
- 人的肠道环境 (pH,氧,度) 显著影响微生物群组成和疾病.
- 对肠道健康的非侵入性监测工具有限,阻碍了诊断和治疗.
- Bacteroides thetaiotaomicron是工程生物传感器的一个有希望的底盘,但缺乏模块化系统.
研究的目的:
- 开发基因工具,用于 Bacteroides thetaiotaomicron 中的模块化生物传感器的工程.
- 创建能够检测肠道度增加的生物传感器,这表明了吸收不良.
- 在体外和体内验证这些生物传感器的功能.
主要方法:
- 开发了可调节光蛋白表达的可抑制促进剂.
- 创建了一个基于DNA的系统来调节抑制器活动.
- 设计了一个模块化,基于光的转录记者电路.
- 设计了生物传感器来检测增加的肠道度.
主要成果:
- 在B. thetaiotaomicron中使用新的遗传工具成功设计了生物传感器.
- 在试验室和小鼠模型中验证了生物传感器检测增加的肠度.
- 通过单细胞光检测证明了肠道度的长期,非侵入性报告.
结论:
- 工程化肠道细菌可以作为监测肠道健康的有效平台.
- 开发的遗传工具使肠道环境变化能够精确地感知和报告.
- 这种方法有可能促进肠道健康诊断和治疗诸如吸收不良等疾病的治疗方法.
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