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Updated: Dec 10, 2025
A Novel Method for the Culture and Polarized Stimulation of Human Intestinal Mucosa Explants
Published on: May 1, 2013
Probiomimetics-Novel Lactobacillus-Mimicking Microparticles Show Anti-Inflammatory and Barrier-Protecting Effects in
Thomas Kuhn1, Marcus Koch2, Gregor Fuhrmann1
1Helmholtz Institute for Pharmaceutical Research Saarland, Department of Pharmacy, Saarland University, Campus E8 1, Saarbrücken, 66123, Germany.
Abstract:
There is a lack of efficient therapies to treat increasingly prevalent autoimmune diseases, such as inflammatory bowel disease and celiac disease. Membrane vesicles (MVs) isolated from probiotic bacteria have shown tremendous potential for treating intestinal inflammatory diseases. However, possible dilution effects and rapid elimination in the gastrointestinal tract may impair their application. A cell-free and anti-inflammatory therapeutic system-probiomimetics-based on MVs of probiotic bacteria (Lactobacillus casei and Lactobacillus plantarum) coupled to the surface of microparticles is developed. The MVs are isolated and characterized for size and protein content. MV morphology is determined using cryoelectron microscopy and is reported for the first time in this study. MVs are nontoxic against macrophage-like dTHP-1 and enterocyte-like Caco-2 cell lines. Subsequently, the MVs are coupled onto the surface of microparticles according to facile aldehyde-group functionalization to obtain probiomimetics. A significant reduction in proinflammatory TNF-α level (by 86%) is observed with probiomimetics but not with native MVs. Moreover, it is demonstrated that probiomimetics have the ability to ameliorate inflammation-induced loss of intestinal barrier function, indicating their potential for further development into an anti-inflammatory formulation. These engineered simple probiomimetics that elicit striking anti-inflammatory effects are a key step toward therapeutic MV translation.
Insights
Engineered probiomimetics, derived from probiotic bacteria membrane vesicles coupled to microparticles, significantly reduce inflammation and improve intestinal barrier function, offering a novel therapeutic approach for autoimmune diseases.
Area of Science:
- Biotechnology
- Immunology
- Gastroenterology
Background:
- Autoimmune diseases like inflammatory bowel disease (IBD) lack efficient therapies.
- Probiotic bacteria-derived membrane vesicles (MVs) show potential for treating intestinal inflammation.
- Challenges with MVs include dilution and rapid elimination in the gastrointestinal tract.
Purpose of the Study:
- To develop a cell-free, anti-inflammatory therapeutic system using MVs coupled to microparticles (probiomimetics).
- To evaluate the anti-inflammatory efficacy and intestinal barrier-protective effects of probiomimetics.
Main Methods:
- Isolation and characterization of MVs from Lactobacillus casei and Lactobacillus plantarum.
- Cryoelectron microscopy for MV morphology determination.
- Coupling of MVs to aldehyde-functionalized microparticles to create probiomimetics.
- Assessment of MVs and probiomimetics' cytotoxicity on dTHP-1 and Caco-2 cell lines.
- Measurement of TNF-α levels and intestinal barrier function in response to probiomimetics.
Main Results:
- MVs were characterized for size, protein content, and morphology (novel cryo-EM data).
- MVs demonstrated no toxicity to macrophage-like dTHP-1 and enterocyte-like Caco-2 cells.
- Probiomimetics significantly reduced proinflammatory TNF-α levels by 86% compared to native MVs.
- Probiomimetics ameliorated inflammation-induced loss of intestinal barrier function.
Conclusions:
- Probiomimetics represent a novel, cell-free therapeutic system with potent anti-inflammatory effects.
- Engineered probiomimetics overcome limitations of native MVs for treating intestinal inflammatory diseases.
- This technology is a significant step toward the therapeutic translation of MVs for autoimmune conditions.
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