Urinary vascular cell adhesion molecule, but not neutrophil gelatinase-associated lipocalin, is associated with lupus nephritis
AN Kiani, T Wu, H Fang, XJ Zhou, CW Ahn… - The Journal of …, 2012 - jrheum.org
The Journal of rheumatology, 2012•jrheum.org
Objective. Vascular cell adhesion molecule-1 (VCAM-1), an adhesion molecule, is involved
in the progression of glomerular and tubulointerstitial injury. Neutrophil gelatinase-
associated lipocalin (NGAL), a member of the lipocalin superfamily, has been shown to rise
in both acute and chronic kidney damage. Both VCAM-1 and NGAL have been found at high
levels in the urine of patients with active lupus nephritis. We investigated both as potential
biomarkers for lupus nephritis. Methods. VCAM-1 and NGAL were measured by ELISA …
in the progression of glomerular and tubulointerstitial injury. Neutrophil gelatinase-
associated lipocalin (NGAL), a member of the lipocalin superfamily, has been shown to rise
in both acute and chronic kidney damage. Both VCAM-1 and NGAL have been found at high
levels in the urine of patients with active lupus nephritis. We investigated both as potential
biomarkers for lupus nephritis. Methods. VCAM-1 and NGAL were measured by ELISA …
Objective
Vascular cell adhesion molecule-1 (VCAM-1), an adhesion molecule, is involved in the progression of glomerular and tubulointerstitial injury. Neutrophil gelatinase-associated lipocalin (NGAL), a member of the lipocalin superfamily, has been shown to rise in both acute and chronic kidney damage. Both VCAM-1 and NGAL have been found at high levels in the urine of patients with active lupus nephritis. We investigated both as potential biomarkers for lupus nephritis.
Methods
VCAM-1 and NGAL were measured by ELISA during 1 to 8 clinic visits in 107 patients with systemic lupus erythematosus (SLE; 91% women, 51% black, 36% white, 4% Asian, 4% Hispanic, and 5% others) for a total of 190 visits. Patients’ mean age was 41 years. We analyzed the relationship between these potential urine biomarkers and the urine protein/creatinine ratio (urine Pr/Cr), the Systemic Lupus International Collaborating Clinics (SLICC) renal activity score, SLE Disease Activity Index renal descriptors, and other clinical variables.
Results
VCAM-1 levels were strongly associated with the physician’s global estimate of disease activity (p = 0.0002), the renal visual analog scale (p < 0.0001), the urine Pr/Cr (p < 0.0001), and SLICC renal activity score (p < 0.0001). VCAM-1 levels were also associated with a urine Pr/Cr ≥ 0.5 (p < 0.0001). NGAL was not associated with any measure of disease activity or with lupus serologies.
Conclusion
Urine VCAM-1 had a strong association with measures of disease activity, including multiple renal activity descriptors. In contrast to previous SLE studies, NGAL failed to show any association with lupus nephritis.
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