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. 1996 Jun;38(6):911–915. doi: 10.1136/gut.38.6.911

Role of interleukin 8 on leucocyte-endothelial cell adhesion in intestinal inflammation.

H Arndt 1, M A Bolanowski 1, D N Granger 1
PMCID: PMC1383201  PMID: 8984032

Abstract

BACKGROUND: An important action of interleukin 8 (IL8) is stimulation of granulocytes. The object of this study was to assess the contribution of IL8 to the leucocyte-endothelial cell interactions associated with intestinal inflammation in the rat. METHODS: Two indomethacin injections (48 and 24 hours prior to the experiments) induced a longlasting ileitis in rats. The number of adherent and emigrated leucocytes, leucocyte rolling velocity, and shear rate were monitored in normal and inflamed mesenteric postcapillary venules. Some animals received a monoclonal antibody (MAb) against IL8 or CD11b/CD18 at 24 and 12 hours prior to the experiment. RESULTS: Indomethacin elicited a seven-fold increase in leucocyte adherence and a 5.4-fold increase in leucocyte emigration, while leucocyte rolling velocity was reduced by nearly 80%. The indomethacin induced increases in leucocyte adherence and emigration were significantly reduced (by 57% and 67%, respectively) while leucocyte rolling velocity was increased (to 63% of control) by the IL8-specific MAb. The level of inhibition seen with the IL8 MAb was similar to that associated with administration of a MAb directed against the leucocyte adhesion molecule CD11b/CD18. CONCLUSIONS: IL8 contributes to the leucocyte-endothelial cell interactions elicited in mesenteric venules by indomethacin.

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Selected References

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