Differential lamina propria cell migration via basement membrane pores of inflammatory bowel disease mucosa

M. E. McAlindon, T. Gray, A. Galvin, H. F. Sewell, D. K. Podolsky, Y. R. Mahida

Research output: Contribution to journalArticle

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Abstract

Background and Aims: In active inflammatory bowel disease (IBD), the intestinal mucosa is infiltrated by polymorphonuclear cells (PMNs), lymphocytes, and monocytes from the systemic circulation. Using an ex vivo model, we have investigated luminally directed migration of cells out of thelamina propria. Methods: Fresh untreated and deepithelialized mucosal samples were studied by electron microscopy. Cells migrating out of the lamina propria were investigated by immunohistochemistry and fluorescence- activated cell sorter analysis. Results: In intact IBD mucosal samples, tunnels containing cells were prominent in the lamina propria matrix, and PMNs, but not other cell types, were prominent in the epithelium. In deepithelialized mucosal samples, the basement membrane was either destroyed or contained numerous large pores. During culture of deepithelialized mucosal samples, many cells (3.3 [±0.8] x 105 · g tissue-1 · h-1) migrated out of the lamina propria via basement membrane pores. PMNs and eosinophils were prominent during the first 3 hours of culture, but T cells predominated thereafter. Macrophages also migrated, but B cells were the minority population (<2%) at all times. Conclusions: In active IBD mucosa with an intact epithelium, luminally directed migration of lamina propria cells is restricted mainly to PMNs. After loss of the epithelium, other cell types also migrate into the lumen via numerous, large, basement membrane pores.

Original languageEnglish (US)
Pages (from-to)841-848
Number of pages8
JournalGastroenterology
Volume115
Issue number4
DOIs
StatePublished - 1998

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Inflammatory Bowel Diseases
Basement Membrane
Cell Movement
Mucous Membrane
Epithelium
Intestinal Mucosa
Eosinophils
Monocytes
Electron Microscopy
B-Lymphocytes
Fluorescence
Immunohistochemistry
Macrophages
Lymphocytes
T-Lymphocytes
Population

ASJC Scopus subject areas

  • Gastroenterology

Cite this

Differential lamina propria cell migration via basement membrane pores of inflammatory bowel disease mucosa. / McAlindon, M. E.; Gray, T.; Galvin, A.; Sewell, H. F.; Podolsky, D. K.; Mahida, Y. R.

In: Gastroenterology, Vol. 115, No. 4, 1998, p. 841-848.

Research output: Contribution to journalArticle

McAlindon, M. E. ; Gray, T. ; Galvin, A. ; Sewell, H. F. ; Podolsky, D. K. ; Mahida, Y. R. / Differential lamina propria cell migration via basement membrane pores of inflammatory bowel disease mucosa. In: Gastroenterology. 1998 ; Vol. 115, No. 4. pp. 841-848.
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AU - Mahida, Y. R.

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