Fishing out AIEC with FimH capturing microgels for inflammatory bowel disease treatment
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.
Authors
- Ruiying Liu (ORCID: https://orcid.org/0000-0002-3133-9205)
- Maobin Xie (ORCID: https://orcid.org/0000-0001-9082-4510)
- Xiyong Yu (ORCID: https://orcid.org/0000-0003-4988-7338)
- Li Juan Wu (ORCID: https://orcid.org/0000-0002-5468-2487)
- Qian Jin (ORCID: https://orcid.org/0000-0002-8401-0374)
- Xiao Changyi (ORCID: https://orcid.org/0000-0002-8952-9714)
- Jialin Wu (ORCID: https://orcid.org/0000-0002-2843-405X)
- Bin Liu (ORCID: https://orcid.org/0000-0002-1896-6941)
- Yutao Liu (ORCID: https://orcid.org/0000-0002-0639-9337)
- Yingying Hou (ORCID: https://orcid.org/0000-0001-8936-2830)
- Guosheng Tang (ORCID: https://orcid.org/0009-0009-2791-8448)
- Leyan Xuan
- X. S. Qin (ORCID: https://orcid.org/0009-0008-8399-339X)
Institutions
- Tianjin University (CN)
- Nankai University (CN)
- Second Affiliated Hospital of Guangzhou Medical University (CN)
- State Key Laboratory of Respiratory Disease (CN)
- Institute for Forecasting of the Slovak Academy of Sciences (SK)
- Guangzhou Medical University (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2025-08-25
- DOI
- https://doi.org/10.1038/s41467-025-63276-7
- Citations
- 6
- Primary Topic
- Gut microbiota and health
- Type
- article
- Field-Weighted Citation Impact
- 4.84
Funders
- National Natural Science Foundation of China