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  • Title: Correlation between the renal C1q deposition and serum anti-C1q antibody: a potential role of anti-C1q antibody in lupus nephritis.
    Author: Chen PC, Wang CR, Liu MF, Chen FF, Liang CC.
    Journal: Asian Pac J Allergy Immunol; 2002 Dec; 20(4):223-7. PubMed ID: 12744622.
    Abstract:
    The anti-C1q antibody has been shown to be associated with lupus patients with renal involvement. We conducted a study to determine the relationship between the serum anti-C1q titer and the renal deposition of C1q. The serum anti-C1q was measured in 26 healthy controls and 47 systemic lupus erythematosus (SLE) patients who were divided into 2 groups as non-nephritis and nephritis SLE. We analyzed the relationship between the anti-C1q titers and SLE, renal C1q staining and the WHO classification for lupus nephritis. The result revealed that the serum anti-C1q was present in 50.8% of the SLE patients, that its levels in those with renal involvement were significantly higher than in the normal control group (61.540 +/- 87.720 U/ml vs 15.750 +/- 2.530 U/ml, p = 0.005). Besides, the serum anti-C1q levels were higher in the patients with lupus nephritis with C1q deposition in the kidney tissue (66.038 +/- 91.141 U/ml vs 16.652 +/- 3.097 U/ml, p < 0.01). There seems to be evidence supporting that the autoantibody anti-C1q might play a pathogenic role in lupus nephritis.
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