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Increased peritoneal permeability in acute experimental pancreatitis
C Svensson1, R Sjödahl, C Tagesson
1Department of Surgery, University Hospital, Linköping, Sweden.
Summary
Acute pancreatitis increases peritoneal membrane permeability to medium-sized dextran molecules (4,000-20,000 daltons). This suggests the transperitoneal route contributes to severe pancreatitis complications.
Area of Science:
- Gastroenterology
- Physiology
- Biochemistry
Background:
- Acute pancreatitis is a severe inflammatory condition.
- The peritoneal membrane's role in acute pancreatitis pathophysiology is not fully understood.
- Understanding peritoneal permeability is crucial for managing systemic complications.
Purpose of the Study:
- To investigate the effect of bile-induced acute pancreatitis on peritoneal permeability in rats.
- To determine how different molecular weights of dextran traverse the peritoneal membrane during pancreatitis.
- To assess the passage of phospholipase A2 across the peritoneal membrane in acute pancreatitis.
Main Methods:
- Bile-induced acute pancreatitis was established in rats.
- Peritoneal permeability was assessed using intraperitoneal injection of dextran molecules (4,000-40,000 daltons).
- Dextran concentrations in blood samples were measured over time.
Main Results:
- Peritoneal permeability significantly increased for dextran molecules between 4,000 and 20,000 daltons in rats with pancreatitis.
- No significant difference in permeability was observed for 40,000 dalton dextran molecules compared to controls.
- Increased passage of phospholipase A2 (14,000 daltons) across the peritoneal membrane was noted during pancreatitis.
Conclusions:
- Acute pancreatitis enhances peritoneal permeability to medium-sized molecules.
- The transperitoneal route may play a significant pathophysiological role in the systemic manifestations of severe acute pancreatitis.
- These findings highlight the peritoneal membrane as a potential factor in pancreatitis progression.