Profile of soluble cytokine receptors in Crohn's disease

Gustot, T.; Lemmers, A.; Louis, E.; Nicaise, C.; Quertinmont, E.; Belaiche, J.; Roland, S.; Van Gossum, A.; Devière, J.; Franchimont, D.
April 2005
Gut;Apr2005, Vol. 54 Issue 4, p488
Academic Journal
Introduction: Soluble cytokine receptors (sCRs) modulate the in vivo activity of cytokines. Deficient sCR production could participate in the pathogenesis and course of Crohn's disease (CD). The aim of the study was to examine the profile of sCRs in CD patients and their modulation by infliximab and corticosteroids. Methods: We prospectively examined active CD patients (aCD) treated with either infliximab (n =21) or corticosteroids (n = 9), CD patients in clinical remission (rCD, n = 20), ulcerative colitis patients (UC, = 24), and healthy subjects (HS, n = 15). Cultures of colonic biopsies were also examined from CD inflamed (n = 8), CD non-inflamed (n = 7), and healthy mucosa (n = 8). Levels of tumour necrosis factor α (TNF-α), soluble TNF receptor I (sTNFRI), soluble TNF receptor II (sTNFRII), interleukin 1β (IL-1β), soluble IL-1 receptor II (slL-1RII), soluble IL-1 receptor (slL-6R), IL-6, soluble 1L-6 receptor (sIL-6R), and sgp130 were measured using ELISA. Results: Higher levels of sTNFRI (p<0.05, p<0.01), sTNFRII (p<0.01, p<0.01), slL-1Rh (p<0.05, NS), IL-6 (p<0.01, p<0.01), and sIL-6R (p<0.05, NS) were observed in aCD compared with rCD and HS. Interestingly, sIL-1RII (p<0.05, p<0.01) and sgp130 (p<0.01, p<0.01) were profoundly decreased in aCD compared with rCD and HS, and were negatively correlated with CRP. Deficient production of sIL- 1RII was specific to CD (not observed in ulcerative colitis), and was further confirmed at the mucosal level. Infliximab decreased sINFRII at one and four weeks (p<0.05) and enhanced sIL-6R levels at one week (p<0.05). Corticosteroids increased sIL-1 Ru levels at one week (p<0.05). Conclusion: CD is associated with dysregulated production of sCRs. Deficiency in sIL-1RII and sgp 130 may be essential to CD pathogenesis. Their replacement through the use of fusion proteins could represent future alternative therapeutic strategies for CD.


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