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Targeting to intestinal M cells

M A Jepson1, M A Clark, N Foster

  • 1Department of Physiological Sciences, University of Newcastle upon Tyne Medical School, UK.

Journal of Anatomy
|December 1, 1996
PubMed
Summary
This summary is machine-generated.

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Microsphere binding to M cells for oral vaccine delivery varies by material and species. Surface modifications, like using lectins, can improve targeting to M cells for enhanced vaccine transport.

Area of Science:

  • Immunology
  • Biomaterials Science
  • Gastroenterology

Background:

  • M cells in the follicle-associated epithelium (FAE) are key targets for oral vaccine delivery.
  • Understanding M cell interactions with delivery vehicles is crucial for effective mucosal immunization.

Purpose of the Study:

  • To investigate the binding and transcytosis of different microspheres by M cells.
  • To explore the potential of surface modifications, such as lectin conjugation, for targeted M cell delivery.

Main Methods:

  • Studied polystyrene and poly(DL-lactide-co-glycolide) microsphere binding and transcytosis in rabbit and murine Peyer's patch M cells.
  • Investigated lectin binding specificity to M cells in different species and regions of the intestine.
  • Assessed the targeting and transcytosis of lectin-conjugated microspheres in murine intestinal segments.

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Main Results:

  • Polystyrene microspheres showed higher binding to rabbit M cells than biodegradable microspheres.
  • Biodegradable microspheres, though not M cell-specific, were efficiently transcytosed by bound M cells.
  • M cell binding varied significantly between species (rabbit vs. murine) and microsphere surface properties.
  • Lectins demonstrated species- and site-specific binding to M cells, enabling targeted delivery in murine models.

Conclusions:

  • Microsphere binding to M cells is influenced by surface characteristics and species-specific variations.
  • Surface modification with lectins offers a promising strategy for enhancing targeted oral vaccine delivery via M cells.
  • Further research into M cell glycoconjugate expression can optimize lectin-based targeting for mucosal immunization.