Serum elastase I levels in pancreatic disease

Area of Science:

• Biochemistry
• Clinical Diagnostics
• Enzyme Assays

Background:

• Pancreatic diseases like pancreatitis and cancer pose significant diagnostic challenges.
• Accurate and sensitive biomarkers are crucial for early detection and management.
• Human elastase I is a potential indicator of pancreatic function and disease.

Purpose of the Study:

• To validate a radioimmunoassay for human elastase I.
• To determine normal serum elastase I levels in healthy individuals.
• To investigate the diagnostic utility of serum elastase I in various pancreatic conditions.

Main Methods:

• Radioimmunoassay (RIA) was employed to measure serum elastase I levels.
• A cohort of 103 subjects, including healthy individuals and patients with pancreatic diseases, was studied.
• Serum elastase I levels were correlated with clinical diagnoses and disease progression.

Main Results:

• The RIA for human elastase I was confirmed as accurate, sensitive, and specific, with results available within 4 hours.
• Normal serum elastase I levels ranged from 99 to 370 ng/dl (mean 200 ng/dl).
• Significantly elevated serum elastase I levels were observed in patients with acute, acute relapsing, and chronic relapsing pancreatitis compared to normal controls.
• Patients with acute pancreatitis showed higher elastase I levels than those with non-pancreatic hyperamylasemia.
• Twelve of 19 patients with pancreatic cancer, particularly those with pancreatic head cancer, exhibited abnormal serum elastase I levels.
• Serum elastase I levels normalized within 5 days post-acute attack but remained elevated in patients with residual pancreatitis signs.

Conclusions:

• Serum elastase I measurement via radioimmunoassay is a reliable diagnostic tool for pancreatic diseases.
• Elevated serum elastase I levels are indicative of pancreatitis and pancreatic cancer.
• This assay offers a rapid and specific method for clinical diagnosis of pancreatic conditions.