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Updated: May 4, 2026

Staining Protocols for Human Pancreatic Islets
Published on: May 23, 2012
Demonstration of pepsinogen C in human pancreatic islets
P B Szecsi1, H Halgreen, S S Poulsen
1Department of Clinical Chemistry, Hvidovre Hospital, Denmark.
Abstract:
Pancreatic tissue from 16 post mortem kidney donors have been examined for the content of pepsinogens. A zymogen with electrophoretic mobility, isoelectric point and molecular weight equal to that of pepsinogen C of gastric origin was found in all specimens. A comparison between pepsinogen C extracted from pancreatic tissue and gastric mucosa demonstrated immunological identity. Quantitative measurements with a radioimmunoassay showed pepsinogen C concentrations in pancreatic tissue three to 80 times higher than those of blood serum. Immunohistochemical staining gave positive reaction for pepsinogen C only in the alpha cells of the pancreatic islets.

