Engineered Escherichia coli Nissle 1917 secreting anti-TNF-α nanobody as a single-strain live biotherapeutic for inflammatory bowel disease
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By
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Qiumei Zhu
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Shitao Feng
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Zhende Yan
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Zijian Wang
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Xinran Huang
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Changning Sun
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Bingqiang Zhang
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Xinrui Li
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Yuchao Gu
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July 2, 2026
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Clinical Scorecard: Genetically Modified Escherichia coli Nissle 1917 Producing Anti-TNF-α Nanobody as a Novel Single-Strain Live Biotherapeutic for Treating Inflammatory Bowel Disease
At a Glance
| Category | Detail |
|---|
| Condition | Inflammatory Bowel Disease (IBD) |
| Key Mechanisms | Localized TNF-α neutralization via engineered probiotics |
| Target Population | Patients with IBD, including Crohn’s disease and ulcerative colitis |
| Care Setting | Clinical settings for IBD treatment |
Key Highlights
- EcN-MT1 significantly reduced weight loss and improved disease activity index in murine colitis models.
- Engineered EcN demonstrated high secretion levels of anti-TNF-α nanobody MT1.
- Treatment restored gut microbial diversity and corrected dysbiosis.
- EcN-MT1 showed potent suppression of pro-inflammatory cytokines in macrophages.
- The study highlights the potential of live biotherapeutics for safer IBD therapies.
Guideline-Based Recommendations
Diagnosis
- Diagnosis of IBD should consider clinical, endoscopic, and histological criteria.
Management
- Consider engineered probiotics like EcN-MT1 for localized treatment of IBD.
Monitoring & Follow-up
- Monitor disease activity index and mucosal healing in IBD patients.
Risks
- Current treatments carry risks of systemic immunosuppression and opportunistic infections.
Patient & Prescribing Data
Patients with chronic inflammatory bowel disease.
EcN-MT1 offers a novel approach by delivering localized anti-inflammatory effects without systemic exposure.
Clinical Best Practices
- Utilize engineered probiotics for targeted therapy in IBD.
- Assess gut microbiota diversity as part of treatment evaluation.
- Incorporate monitoring of pro-inflammatory cytokines in treatment plans.
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