Fishing out AIEC with FimH capturing microgels for inflammatory bowel disease treatment

作者：Jialin Wu, Yutao Liu, Ruiying Liu, Xiao Changyi, Leyan Xuan, Li Wu, Jiamin Qian, X. S. Qin, Yingying Hou, Maobin Xie, Xiyong Yu, Bin Liu, Guosheng Tang · 发表于：Nature Communications · 年份：2025 · DOI：10.1038/s41467-025-63276-7 · 被引用次数：10 · 研究领域：Gut microbiota and health、Cystic Fibrosis Research Advances、Advanced Drug Delivery Systems

Inflammatory bowel disease (IBD) is a chronic immune-mediated condition with rising global incidence and limited treatment options. Current therapies often have poor efficacy and undesirable side effects. Here we present a drug-free strategy that targets bacterial adhesion to manage IBD. We develop porous microgels loaded with mannan oligosaccharides (MOS) that mimic the natural binding sites of intestinal cells. These microgels attract adherent-invasive Escherichia coli (AIEC) by interacting with FimH, a bacterial protein used for attachment, thereby preventing AIEC from colonizing the gut lining. The microgels are fabricated using an all-aqueous two-phase system, enabling biocompatibility and structural control. In a mouse model of IBD, this competitive adsorption approach alleviates intestinal inflammation, reduces harmful Enterobacteriaceae, and enhances gut microbial diversity. This work introduces a non-antibiotic, bioinspired method that intercepts pathogenic bacteria and restores microbial balance, offering a promising therapeutic strategy for IBD.