TY - JOUR
T1 - Differential lamina propria cell migration via basement membrane pores of inflammatory bowel disease mucosa
AU - McAlindon, M. E.
AU - Gray, T.
AU - Galvin, A.
AU - Sewell, H. F.
AU - Podolsky, D. K.
AU - Mahida, Y. R.
N1 - Funding Information:
Supported by the British Digestive Foundation (to M.E.M.). Equipment funded by the Wellcome Trust (Wellcome) was used in the electron microscopy studies.
PY - 1998
Y1 - 1998
N2 - 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.
AB - 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.
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U2 - 10.1016/S0016-5085(98)70255-0
DO - 10.1016/S0016-5085(98)70255-0
M3 - Article
C2 - 9753486
AN - SCOPUS:0031665221
SN - 0016-5085
VL - 115
SP - 841
EP - 848
JO - Gastroenterology
JF - Gastroenterology
IS - 4
ER -