Response, relapse and mucosal immune regulation after infliximab treatment in fistulating Crohn's disease.

Abstract:

BACKGROUND:Infliximab reduces mucosal inflammation in some, but not all, patients with Crohn's disease. AIM:To monitor clinical data and changes in mucosal cytokine levels after infliximab treatment to identify differences between responders and non-responders. METHODS:Twenty-six patients with fistulating Crohn's disease received three infliximab infusions at weeks 0, 2 and 6. Follow-up was for 1 year and included clinical examination, colonoscopy, ano-rectal ultrasound and magnetic resonance imaging. Biopsies were taken at weeks 0, 8, 26 and 52. Cell cultures were established and analysed for tumour necrosis factor-alpha, interferon-gamma and interleukin-10 levels, and related to clinical status and fistula healing. RESULTS:Eleven of 15 patients (73%) with active disease (Crohn's disease activity index > 150) obtained remission (Crohn's disease activity index < 150) at 8 weeks. In in vitro cell cultures, there was reduced tumour necrosis factor-alpha and interleukin-10 production at week 26, with the latter persistent throughout the study period. When the disease deteriorated or relapsed, there was increased interferon-gamma production in in vitro cell cultures. Fistula healing was associated with reduced production of interferon-gamma, tumour necrosis factor-alpha and interleukin-10. CONCLUSIONS:Infliximab down-regulates mucosal immune activation in Crohn's disease. Monitoring of mucosal cytokine levels after infliximab treatment by whole biopsy cultures may be useful as interleukin-10, tumour necrosis factor-alpha and interferon-gamma production are different in responders and at relapse.

journal_name

Aliment Pharmacol Ther

authors

Agnholt J,Dahlerup JF,Buntzen S,Tøttrup A,Nielsen SL,Lundorf E

doi

10.1046/j.1365-2036.2003.01487.x

subject

Has Abstract

pub_date

2003-03-01 00:00:00

pages

703-10

issue

5

eissn

0269-2813

issn

1365-2036

pii

1487

journal_volume

17

pub_type

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