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Pancreatic elastase is a compact globular protein with a hydrophobic core. This enzyme is formed by three subunits. Each subunit binds one calcium ion ().There are three important metal-binding sites in amino acids 77, 82, 87. [4]
The fecal elastase test measures the concentration of the elastase-3B enzyme found in fecal matter with an enzyme-linked immunosorbent assay . Results of this test can give a good indication of exocrine pancreatic status, and the test is less invasive and expensive than the current "gold standard", secretin-cholecystokinin test. [9] Levels of ...
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 ...
Chymotrypsin-like elastase family member 1 (CELA1) also known as elastase-1 (ELA1) is an enzyme that in humans is encoded by the CELA1 gene. Elastases form a subfamily of serine proteases that hydrolyze many proteins in addition to elastin. Humans have six elastase genes which encode the structurally similar proteins elastase 1, 2, 2A, 2B, 3A ...
Note that "pancreatic elastase 1" is, in fact, not found in the pancreas, but produced in the skin. [5] "Pancreatic elastase 1" (CELA1) is expressed in skin keratinocytes. [6] Neutrophil elastase breaks down the Outer membrane protein A (OmpA) of E. coli and other Gram-negative bacteria, killing the bacterium carrying the protein. [7]
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. [3]
In chronic pancreatitis, the fecal pancreatic elastase-1 (FPE-1) test is a marker of exocrine pancreatic function. Additional tests that may be useful in evaluating chronic pancreatitis include hemoglobin A1C , immunoglobulin G4 , rheumatoid factor , and anti-nuclear antibody .
Fecal fat study to diagnose steatorrhoea is rarely performed nowadays. Low fecal pancreatic elastase is indicative of pancreatic insufficiency. Chymotrypsin and pancreolauryl can be assessed as well [12]
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