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Pancreatic elastase 1 is a serine endopeptidase, a specific type of protease that has the amino acid serine at its active site. Although the recommended name is pancreatic elastase, it can also be referred to as elastase-1, pancreatopeptidase, PE, or serine elastase.
The latter is a less used test that assesses exocrine function in the pancreas by inserting a tube into the small intestine to collect pancreatic secretions. The fecal elastase test is a less cumbersome test that has replaced the 72-hour fecal fat test; in the fecal elastase test, pancreatic enzyme replacement therapy (enzyme supplementation ...
The four "pancreatic elastases", chymotrypsin, and neutrophil elastase are serine proteases. [3] The "macrophage elastase" is a matrix metallopeptidase . Chymotrypsin is weaker at digesting elastin than the architypical pancreatic elastase.
Exocrine pancreatic insufficiency can be confirmed by also checking a fecal elastase level, with low levels specifying exocrine pancreatic insufficiency. [3] A quantitative fecal fat test can also be done to quantify the fat levels in the stool and confirm the presence of exocrine pancreatic insufficiency.
Chymotrypsin-like elastase family member 3B also known as elastase-3B, protease E, or fecal elastase is an enzyme that in humans is encoded by the CELA3B gene. [ 5 ] [ 6 ] [ 7 ] Clinical literature that describes human elastase 1 activity in the pancreas or fecal material is actually referring to chymotrypsin-like elastase family member 3B (i.e ...
Exocrine pancreatic dysfunction: Pancreatic exocrine insufficiency arises due to a lack of acinar cells that produce digestive enzymes. These are extensively depleted and replaced by fat. A lack of pancreatic digestive enzymes leaves patients unable to digest and absorb fat. However, pancreatic status may improve with age in some patients.
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