Procollagen 3 (P3NP)
| Category | Biochemistry |
|---|---|
| Test background |
The amino-terminal peptide of type 3 procollagen (P3NP) is formed during the synthesis of type 3 collagen. Serum P3NP is used as a marker for hepatic fibrosis in patients on long-term, low-dose methotrexate. |
| Clinical Indications |
Monitoring of patients receiving low-dose methotrexate therapy. |
| Reference range | See report |
| Sample & container required | SST (gold top) or serum (red top) |
| Sample volume | 0.5 mL |
| Turnaround time | Up to 2 weeks |
| Notes | Not currently performed in house; this is a referred test. |