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  • Title: Antinucleosome antibodies as a potential biomarker for the evaluation of renal pathological activity in patients with proliferative lupus nephritis.
    Author: Hung WT, Chen YM, Lan JL, Chen HH, Chen YH, Chen DY, Hsieh CW, Wen MC.
    Journal: Lupus; 2011 Nov; 20(13):1404-10. PubMed ID: 21946514.
    Abstract:
    The objective of this study is to evaluate the correlation between antinucleosome antibodies and renal pathological activity in patients with proliferative lupus nephritis (LN). We evaluated 36 patients with proliferative LN, 14 non-renal lupus patients and 10 healthy volunteers. Lupus activity was assessed using the British Isles Lupus Assessment Group 2004 (BILAG 2004) index, serum anti-double stranded DNA (anti-dsDNA) levels, serum complement levels and daily urinary protein levels. All 36 lupus nephritis patients received renal biopsy. Antinucleosome antibodies were detected by enzyme-linked immunosorbent assay (ELISA). Our results showed that levels of serum antinucleosome antibodies were significantly higher in LN patients (median 90.35 units/ml, interquartile range [IQR] 37.38-135.23) than in non-renal SLE patients (median 5.45 units/ml, IQR 2.6-28.93, p <0.05) and in healthy volunteers (median 3.35 units/ml, IQR 2.95-5.23, p <0.001). Serum levels of antinucleosome antibodies were positively correlated with BILAG index (Spearman's r = 0.645, p <0.001) and serum anti-dsDNA antibody levels (r(s) = 0.644, p <0.01), while serum levels of antinucleosome antibodies were negatively correlated with serum levels of C3 (r(s) = -0.400, p <0.01) and C4 (r(s) = -0.300, p <0.05). Serum levels of antinucleosome antibodies were positively correlated with the histological activity index of LN (r(s) = 0.368, p <0.05). However, there was no significant correlation between serum levels of antinucleosome antibodies and the histological chronicity index. In conclusion, the serum level of antinucleosome antibodies is a potential biomarker for early recognition of renal involvement and evaluation of disease activity in SLE. Our preliminary results suggested that serum levels of antinucleosome antibodies might be a potential biomarker in evaluating pathological activity of LN.
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