Summary
The bile acid composition in the duodenal juice which was collected by Pancreozymin-Secretin test (P-S test) in twenty-one patients with chronic pancreatitis (including suspected chronic pancreatitis) was analyzed by gas-liquid chromatography.
Maximal bicarbonate concentration, amylase output and volume were measured as pancreatic function by P-S test. Secretory pattern of icterus index was revealed as biliary function. Relation between changes of bile acid composition, pancreatic exocrine function and secretory pattern of icterus index was examined. Results are as follows;
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1)
Secretory pattern of icterus index during P-S test showed a delayed pattern in patients with chronic pancreatitis.
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2)
Suspected chronic pancreatitis and calcifying chronic pancreatitis with normal pancreatic exocrine function showed normal bile acid composition. But, slight chronic pancreatitis and severe chronic pancreatitis showed decrease of chenodeoxycholic acid (p<0.01)and increase of secondary bile acids (deoxy cholic acid, lithocholic acid, p<0.01), respectively.
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3)
There was a negative correlation between maximal bicarbonate concentration and percentages of bile acids, such as cholic, deoxycholic and lithocholic acid.
On the other hand, it was found that there was a positive correlation between maximal bicarbonate concentration and percentage of chenodeoxycholic acid (p<0.01).
Conclusively, increase of secondary bile acids in the patients with severe chronic pancreatitis was considered to be based on the incessant contact with bacteria in the digestive canal, because of a delayed pattern of icterus index during P-S test.
Decrease of chenodeoxycholic acid was thought to be precipitated glyco-chenodeoxycholic acid which had a high dissociation constant (pKa), because of a low pH in the digestive canal resulting from insufficiency of bicarbonate excretion in the patients with chronic pancreatitis.
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Nakamura, T. The changes of bile acid composition in the patients with chronic pancreatitis (Including suspected chronic pancreatitis). Gastroenterol Jpn 14, 114–121 (1979). https://doi.org/10.1007/BF02773582
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DOI: https://doi.org/10.1007/BF02773582