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The British Journal of Rheumatology, Vol 37, 1303-1306, Copyright © 1998 by British Society for Rheumatology

ORIGINAL PAPERS

Serum levels of vascular endothelial growth factor (VEGF) are markedly elevated in patients with Wegener's granulomatosis

CG Li, I Reynolds, JM Ponting, PJ Holt, MC Hillarby and S Kumar
Musculoskeletal Research Group, University of Manchester.

OBJECTIVES: Necrotizing vasculitis and granuloma formation are the predominant features of Wegener's granulomatosis (WG). We have investigated the importance of vascular endothelial growth factor (VEGF) in monitoring disease activity in WG. METHODS: Serum VEGF levels were determined in 23 patients with active WG, 21 healthy controls and 25 patients with urinary infection, by ELISA using commercially available antibodies to VEGF. RESULTS: VEGF levels were enormously elevated in patients with WG compared to both controls and patients with urinary infection (P < 0.0001). Of the 23 patients, 21 (91.3%) had VEGF levels above the cut-off value (3.3 ng/ml, calculated as the mean of the controls + 2 S.D.). Further analysis of the data showed that VEGF levels did not correlate with age, sex, incidence of classic antineutrophil cytoplasmic antibodies (c-ANCA) or duration of the disease (P > 0.05), but there was correlation with disease activity (r = 0.51, P < 0.01). VEGF levels were higher in patients with major compared to those with minor disease activity (P < 0.01). However, there was no significant correlation between VEGF levels and the Birmingham scores for vascular activity and damage. CONCLUSION: VEGF levels are raised in WG patients compared to normal controls and may be a marker of disease activity. Further studies on serial blood samples from a large cohort of patients with WG and other systemic vasculitides are needed to evaluate the specificity and usefulness of VEGF levels in monitoring disease activity.
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