Anti-C1q Antibody, IgG
Test Mnemonic
AC1QGG
CPT Codes
- 83516 - QTY (1)
Aliases
- C1q IgG Ab
Includes
- Anti-C1q Antibody, IgG
Performing Laboratory
ARUP
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL | Serum | SST (Gold) | Refrigerated | Separate serum from cells ASAP or within 2 hours of collection and transfer to standard aliquot tube. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.15 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Refrigerated | 2 weeks |
| Frozen | 1 year (avoid repeated freeze/thaw cycles) |
| Ambient | 48 hours |
Days Performed
Wed
Turnaround Time
2 - 16 days
Methodology
| Name | Description |
|---|---|
| Semi Quantitative Enzyme Linked Immunosorbent Assay |
Reference Range
| Anti-C1q Ab IgG | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Refer to report |
Special Info
Contaminated, heat-inactivated, severely hemolyzed or severely lipemic specimens will be rejected. This test is New York state approved.
Clinical Info
This test may be useful to assess risk for lupus nephritis and global systemic lupus erythematosus (SLE) disease activity. 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.