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Updated: Mar 22, 2026

Isolation and Flow Cytometric Characterization of Murine Small Intestinal Lymphocytes
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Exosome in intestinal mucosal immunity.

An Tao Xu1, Jun Tao Lu1, Zhi Hua Ran2

  • 1Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai IBD Research Center, Shanghai, China.

Journal of Gastroenterology and Hepatology
|April 11, 2016
PubMed
Summary

Exosomes, crucial intercellular messengers, transfer genetic material between immune cells. Their role in inflammatory bowel disease is highlighted by increased RAB27A/B proteins in ulcerative colitis patients, suggesting exosome involvement in gut immunity.

Keywords:
ExosomeRab27ARab27Binflammatory bowel disease

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Area of Science:

  • Immunology
  • Gastroenterology
  • Cell Biology

Background:

  • Immune cell communication is vital for inflammation, with imbalances in mediators characterizing inflammatory bowel disease (IBD).
  • Exosomes, extracellular vesicles, are increasingly recognized as key intercellular messengers in immune responses.
  • Exosomes facilitate the transfer of genetic materials like mRNAs and miRNAs between cells.

Purpose of the Study:

  • To discuss the immune properties and functions of exosomes.
  • To highlight the role of exosome-mediated communication in intestinal mucosal immunity.
  • To explore the involvement of exosomes in the pathogenesis of inflammatory bowel disease.

Main Methods:

  • Review of current literature on exosome function in immune responses.
  • Focus on RAB27A and RAB27B GTPases, critical for exosome secretion.
  • Analysis of studies examining immune cell populations in IBD patients.

Main Results:

  • Exosomes mediate functional transfer of genetic materials (mRNAs, miRNAs) between immune cells.
  • RAB27A and RAB27B are key regulators of exosome secretion.
  • Increased RAB27A-positive and RAB27B-positive immune cells are observed in the colonic mucosa of active ulcerative colitis patients compared to controls.

Conclusions:

  • Exosome-mediated intercellular communication plays a significant role in immune responses.
  • The elevated presence of RAB27A and RAB27B in ulcerative colitis suggests exosome involvement in IBD pathogenesis.
  • Further research into exosome functions is crucial for understanding and potentially treating intestinal mucosal immune disorders.