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Renewal of Intestinal Stem Cells01:23

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The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
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MSC-Derived Exosomes Alleviate Intestinal Barrier Injury in an IBD-on-a-Chip.

Yingying Xie1,2, Xiuli Guan1,2, Mingxian Liu1,3

  • 1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.

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|July 24, 2025
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Summary

A novel Inflammatory Bowel Disease (IBD)-on-a-chip model replicates IBD's pathology. This model demonstrated that 5-Amino Salicylic Acid (5-ASA) and mesenchymal stem cell-derived exosomes (MSC-Exos) effectively treat intestinal damage and inflammation.

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IBD‐on‐a‐chipdisease modelexosome

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Area of Science:

  • Gastroenterology
  • Biomedical Engineering
  • Cell Biology

Background:

  • Inflammatory Bowel Disease (IBD) is a chronic gastrointestinal inflammatory condition with unknown causes.
  • Developing accurate preclinical models is vital for understanding IBD pathogenesis and testing therapies.
  • Existing models may not fully capture the complex pathological features of IBD.

Purpose of the Study:

  • To develop and validate a pumpless Inflammatory Bowel Disease (IBD)-on-a-chip model.
  • To assess the therapeutic potential of 5-Amino Salicylic Acid (5-ASA) and mesenchymal stem cell (MSC)-derived exosomes (MSC-Exos) using this model.
  • To investigate the mechanisms underlying the therapeutic effects of MSC-Exos on IBD-related inflammation.

Main Methods:

  • Development of a microfluidic "IBD-on-a-chip" device.
  • Replication of key IBD pathological features: barrier disruption, villus destruction, macrophage polarization, inflammation, and vascular changes.
  • In vitro evaluation of 5-ASA and MSC-Exos as therapeutic agents.
  • Transcriptomic analysis to identify molecular pathways affected by MSC-Exos.

Main Results:

  • The IBD-on-a-chip model successfully mimicked critical IBD pathological changes.
  • Both 5-ASA and MSC-Exos demonstrated protective effects on intestinal villous structure.
  • MSC-Exos modulated macrophage polarization towards an M2 phenotype and suppressed inflammatory responses.
  • Transcriptomic analysis revealed modulation of inflammation-related signaling pathways by MSC-Exos.

Conclusions:

  • The developed pumpless IBD-on-a-chip model is a valuable tool for studying IBD pathogenesis and evaluating therapeutic interventions.
  • MSC-Exos show promise as a therapeutic strategy for IBD by reducing intestinal damage and suppressing inflammation.
  • This study represents the first use of an IBD-on-a-chip model to assess MSC-Exos efficacy, paving the way for novel IBD treatment development.