Tumour necrosis factor-alpha (TNF), lymphotoxin and TNF receptor levels in serum from patients with Wegener's granulomatosis

APMIS : Acta Pathologica, Microbiologica, Et Immunologica Scandinavica
O JónasdóttirK Bendtzen

Abstract

Wegener's granulomatosis (WG) is a systemic inflammatory disease with vasculitis as the key feature. Abnormal expression of tumour necrosis factor alpha (TNFalpha) is considered of prime pathogenic importance in several inflammatory diseases. The effects of TNFa are mediated by TNF receptors (TNF-R), and these receptors are often found in soluble forms (sTNF-R), which can modulate TNFalpha actions. To evaluate the clinical importance of the TNF family of cytokines, the serum levels of TNFalpha, TNFbeta, now termed lymphotoxin (LTalpha), and sTNF-R1 and sTNF-R2 were measured by ELISA in 8 patients with WG during active disease and during immunosuppressive treatment, and in 11 healthy controls in parallel. Serum concentrations of TNFalpha were undetectable in all except two controls (18%) and three patients with WG (37%). After 7 days of therapy, six of the WG patients had measurable TNFalpha levels. Examination of the relative amounts of TNFalpha and sTNF-R indicated that TNFalpha was mostly bound to its soluble receptors. In WG, the serum levels of sTNF-R1 and sTNF-R2 were dramatically increased (p<0.01), with little or no variation during treatment. While the IL-1beta levels did not deviate significantly from controls, the IL-...Continue Reading

Citations

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