黑色素与工程益生菌的生物合成用于口腔治疗性结肠炎
Yu Liu1,2, Xiazi Huang3, Xiaohua Jia3,4
1Department of Radiology and Nuclear Medicine, Xuanwu Hospital, Capital Medical University, Beijing 100053, China.
ACS nano
|June 4, 2025
概括
产生黑色素的工程细菌 (EcN-Mel) 通过稳定肠道微生物群和减少氧化应激,有效治疗性结肠炎. 这种新的方法为肠道炎症提供了一个有前途,安全和有效的治疗策略.
科学领域:
- 胃肠病学 胃肠病学
- 微生物学 微生物学
- 生物技术是生物技术.
背景情况:
- 性结肠炎 (UC) 涉及免疫过活和肠道失调,导致氧化应激和炎症.
- 目前的UC治疗有局限性,包括低效率和不良影响.
- 益生菌的有效性受到胃肠道环境的阻碍,目前的涂层方法存在挑战.
研究的目的:
- 开发和评估工程细菌 (EcN-Mel) 用于管理氧化应激和恢复UC的肠道微生物群平衡.
- 评估UC小鼠模型中口服EcN-Mel的安全性,可行性和有效性.
主要方法:
- 基因改造的 *Escherichia coli* Nissle 1917 (EcN-Mel) 被设计成可以产生黑色素.
- 类似黑色素的纳米酶被利用了它们的稳定性和反应性氧物种清理特性.
- 在UC小鼠模型中对口服EcN-Mel进行了评估,评估包括体内成像,微生物群分析和组织学检查.
主要成果:
- 埃克尼-梅尔证明了有针对性的肠粘附,自由基清除和胃肠道稳定性.
- 在体内成像证实了在炎症区域增强的殖民效率和EcN-Mel的保留.
- 通过 EcN-Mel 调节肠道微生物群,增加有益的 * Lactobacillus * 和减少有害的 * Proteobacteria * ,促进平衡和缓解大肠炎.
结论:
- 通过对微生物群,氧化应激,细胞因子和屏障功能的联合作用,EcN-Mel有效地减轻UC的肠粘膜损伤.
- 这项研究证实了EcN-Mel在性结肠炎治疗中的安全性,可行性和治疗潜力.
- 工程化生产黑色素的细菌代表了一种有希望的新策略,用于管理炎症性肠道疾病.
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