Follicle epithelial M cells are a source of interleukin-1 in Peyer's patches

Immunology. 1993 Mar;78(3):505-7.


The production of interleukin-1 (IL-1) by rabbit Peyer's patch M cells populating the follicle-associated epithelium (FAE) was studied. Sorted 5D9+ phagocytic epithelial M cells synthesized IL-1 after stimulation with lipopolysaccharide (LPS) in vitro, as evidenced by the ability of culture supernatants to induce the proliferation of the T-cell line D10.G4.1. Fixed LPS-stimulated M cells were less effective at mediating T-cell proliferation than supernatants from LPS-activated M cells. The magnitude of T-cell proliferation was M-cell concentration dependent, and proportional to the dose of LPS. The M-cell-mediated D10.G4.1 cell proliferation was inhibited > 75% with anti-IL-1 alpha, but < 50% with similar concentrations of anti-IL-1 beta. The results show that M cells secrete IL-1, and suggest the participation of M cells in the delivery of a localized co-stimulatory signal for T-cell and B-cell proliferation in the microenvironment of gut-associated lymphoid tissue (GALT).

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Cells, Cultured
  • Epithelium / immunology
  • Interleukin-1 / biosynthesis*
  • Lipopolysaccharides / immunology
  • Peyer's Patches / immunology*
  • Phagocytes / immunology*
  • Rabbits


  • Interleukin-1
  • Lipopolysaccharides