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.
Analyte Specific Reagent (ASR)
|Component Test Code*||Component Chart Name||LOINC|
|2007602||Anti-C1q Antibody, IgG|
- C1q IgG Ab