Conclusion: Elevation of serum pancreatic stone protein- (PSP) S1 suggests activation of trypsinogen in the pancreas. This information would prompt the start of intensive treatment and may improve prognosis of acute pancreatitis (AP).
Background: PSP exists in two molecular forms, PSP-S2–5 and PSP-S1. PSP-S1 is produced by enzyme cleavage of PSP-S2–5 by trypsin. Total serum PSP rose in AP, but little is known about its molecular forms. In this study, we characterized the molecular forms of serum PSP in AP.
Methods: Sera were taken from 8 patients with severe acute pancreatitis (sAP) and from 11 patients with mild acute pancreatitis (mAP). Serum PSP was characterized by high-performance liquid chromatography (HPLC) followed by the specific enzyme immunoassay (EIA).
Results: The total serum PSP in sAP was higher than in mAP, but the difference was not significant. The PSP-S1 was detected in serum in all (7/7) patients in sAP and in 72% (8/11) of patients in mAP. Serum level of PSP-S1 was significantly higher in sAP than that in mAP (p<0.05), and the cutoff value to distinguish the two groups was 30 ng/mL. Serum PSP-S1 did not show significant correlation with total PSP, immunoreactive trypsin, or C-reactive protein.
Pancreatic stone protein acute pancreatitis trypsin molecular form
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