Leptin, Serum or Plasma
Use
Measurement of leptin levels in serum or plasma
Special Instructions
Serum or plasma should be transferred from cells to a plastic transport tube after collection. The stability of the specimen varies with the temperature of storage: 14 days at room temperature, 30 days if refrigerated, and 21 days if frozen with stability across three freeze/thaw cycles.
Limitations
This test was developed and its performance characteristics were determined by Labcorp and have not been cleared or approved by the Food and Drug Administration. Leptin deficiency is a rare cause of obesity and mutations in the leptin gene or leptin receptor gene are uncommon. In obesity, higher levels of leptin are noted, which often result in leptin resistance rather than deficiency.
Methodology
Immunoassay (EIA)
Biomarkers
LOINC Codes
- 21365-2
- 21365-2
Result Turnaround Time
4-5 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL
Minimum Volume
0.2 mL
Container
Red-top tube, gel-barrier tube, or lavender-top (EDTA) tube
Collection Instructions
Transfer serum or plasma from cells and transfer to a plastic transport tube.
Storage Instructions
Room temperature: 14 days; Refrigerated: 30 days; Frozen: 21 days; Stable through 3 freeze/thaw cycles.
Causes for Rejection
Gross lipemia; gross hemolysis
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 30 days |
| Frozen | 21 days |