Clinico-pathological associations of serum VCAM-1 and ICAM-1 levels in patients with lupus nephritis

Objective We investigated the clinico-pathological associations of serum VCAM-1 and ICAM-1 levels in patients with biopsy-proven Class III/IV±V lupus nephritis (LN). Methods Serum VCAM-1 and ICAM-1 levels were determined by ELISAs. Sera from patients with non-renal SLE or non-lupus chronic kidney di...

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Published in:	Lupus Vol. 30; no. 7; pp. 1039 - 1050
Main Authors:	Yu, Kelvin YC, Yung, Susan, Chau, Mel KM, Tang, Colin SO, Yap, Desmond YH, Tang, Alexander HN, Ying, Shirley KY, Lee, Cheuk Kwong, Chan, Tak Mao
Format:	Journal Article
Language:	English
Published:	London, England SAGE Publications 01-06-2021 Sage Publications Ltd
Subjects:	Anti-DNA antibodies Biopsy Cell activation Creatinine Endothelial cells Hyaluronic acid Inflammation Intercellular adhesion molecule 1 Kidney diseases Lupus Lupus nephritis Nephritis Patients Proteinuria Remission Syndecan Thrombomodulin Vascular cell adhesion molecule 1 Vascular cell adhesion molecule-1, Intercellular adhesion molecule-1 Lupus nephritis
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Summary:	Objective We investigated the clinico-pathological associations of serum VCAM-1 and ICAM-1 levels in patients with biopsy-proven Class III/IV±V lupus nephritis (LN). Methods Serum VCAM-1 and ICAM-1 levels were determined by ELISAs. Sera from patients with non-renal SLE or non-lupus chronic kidney disease (CKD), and healthy subjects served as controls. Results Seropositivity rate for VCAM-1 and ICAM-1 was 93.10% and 37.93% respectively at the time of nephritic flare, and 44.83% and 13.79% respectively at remission, with both showing higher levels during flare (P < 0.05, for both). VCAM-1 level correlated with proteinuria, serum creatinine, and anti-dsDNA antibodies, and inversely correlated with C3. VCAM-1 level also correlated with leukocyte infiltration and fibrinoid necrosis/karyorrhexis scores in active LN kidney biopsies. ICAM-1 level correlated with proteinuria, but not anti-dsDNA or C3, nor histopathological features. VCAM-1 level increased 4.5 months before renal flare, while ICAM-1 increase coincided with flare, and both decreased after treatment. ROC analysis showed that VCAM-1 distinguished active LN from healthy subjects, LN in remission, active non-renal lupus, and CKD (ROC AUC of 0.98, 0.86, 0.93 and 0.90 respectively). VCAM-1 level in combination with either proteinuria or C3 was superior in distinguishing active LN from remission compared to the measurement of individual markers. Serum ICAM-1 level distinguished active LN from healthy subjects and LN patients in remission (ROC AUC of 0.75 and 0.66 respectively), but did not distinguish between renal versus non-renal lupus. ICAM-1 level in combination with markers of endothelial cell activation (syndecan-1, hyaluronan and thrombomodulin) was superior to proteinuria, anti-dsDNA, or C3 in distinguishing active LN from quiescent disease. Conclusion Our findings suggest potential utility of serum VCAM-1 and ICAM-1 in clinical management. Monitoring VCAM-1 may facilitate early diagnosis of flare. Combining selected biomarkers may be advantageous in diagnosing active LN. VCAM-1 may have a pathogenic role in renal parenchymal inflammation in active LN.
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ISSN:	0961-2033 1477-0962
DOI:	10.1177/09612033211004727