Assess risk for lupus nephritis and global systemic lupus erythematosus (SLE) disease activity.
Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Serum separator tube.
Separate serum from cells ASAP or within 2 hours of collection. Transfer 0.5 mL serum to an ARUP Standard Transport Tube. (Min: 0.15 mL)
Urine or plasma. Contaminated, heat-inactivated, severely hemolyzed or severely lipemic specimens.
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
|40 Units or greater||Positive|
The presence of the anti-C1q IgG antibody may be associated with increased risk of lupus nephritis or with systemic lupus erythematosus (SLE) global activity. Anti-C1q antibodies are not specific for SLE; strong clinical correlation with disease is recommended.
Compliance Statement A: For laboratory developed tests using a manufacturer labeled ASR as the reagent providing the specificity of the assay. Analyte Specific Reagent. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, the FDA has determined that such clearance or approval is not necessary.
|Component Test Code*||Component Chart Name||LOINC|
|2007602||Anti-C1q Antibody, IgG|
- C1q IgG Ab