mBio
Cure8 research brief
Why This Matters
If AIEC contribute to Crohn’s disease in some people, this study suggests bacterial metabolism linked to vitamin B12 can change how invasive and inflammatory those bacteria are. That points to the possibility of modifying host micronutrients or targeting microbial metabolism to reduce AIEC-driven inflammation.
Who Should Pay Attention
Researchers studying IBD microbiology or microbe–host nutrient interactions; clinicians and translational scientists interested in infection-driven Crohn’s disease mechanisms; patients and advocates following microbiome-targeted therapies (with the caveat that this is preclinical).
Study Snapshot
Story typeResearch paper
Evidence typeResearch paper
Source depthJournal abstract
What To Know
This mBio abstract reports that a bacterial gene (pduB) in adherent-invasive Escherichia coli (AIEC) is required for epithelial invasion and for causing colitis in mouse models (Il10−/− mice).
Deleting pduB reduced mucosal association, barrier dysfunction, and pro-inflammatory cytokine expression; unexpectedly, pduB deletion raised host serum vitamin B12 levels. The authors found that vitamin B12 supplementation inhibited AIEC invasion in vitro and strongly protected Il10−/− mice from AIEC-driven colitis.
The work frames vitamin B12 availability as a host-modifiable factor that alters AIEC pathogenicity and suggests microbe–nutrient interactions could be therapeutic targets. Key details from the source The study focused on the pdu (1,2-propanediol utilization) operon and specifically pduB in the prototypical AIEC strain NRG857c.
Effects were demonstrated in cell invasion assays and multiple mouse models, including Il10−/− mice. Vitamin B12 was shown to be both altered during infection and, when supplemented, able to suppress AIEC invasion in a pdu-dependent manner.
What this is not These findings come from laboratory and mouse experiments reported in the journal abstract; they do not establish that vitamin B12 supplementation is effective or safe for people with Crohn’s disease. Clinical studies in humans would be needed before changing treatment or taking vitamin B12 specifically to target AIEC.
Keep In Mind
Structured content depth: abstract — the classification and note are grounded in the source-provided abstract and full text available in the journal; findings are preclinical (mouse and in vitro) and do not constitute clinical evidence.
Source Details
Review the original publication for the complete reporting, methods, and context.
Research paper
Evidence type derived from source or registry metadata.
PublicationmBio
PublisherAmerican Society for Microbiology
AuthorsShahanshah Khan, Jungyeon Kim, Alexander Lafrance +9 more
Study typeJournal Article
Indexed viaCrossref
Source typeResearch paper
PublishedSep 16, 2026, 12:00 AM
Content availableJournal abstract
Funding disclosed by the source: National Institutes of Health, award K08 DK-123316; Burroughs Wellcome Fund, award G-1020904.01; National Institutes of Health, award T32 AI007520; Howard Hughes Medical Institute, award Emerging Pathogens Initiative
This Cure8 brief is based on source text from the linked article. Cure8 is informational only and is not a substitute for professional medical advice, diagnosis, or treatment.
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