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Immunohistochemical localization of exocrine enzymes in normal rat pancreas

M Bendayan and S Ito

On the basis of morphological and biochemical differences, the exocrine pancreatic tissue has been divided in peri- and teleinsular regions. In the present study the enzymatic profile of these regions has been investigated by the immunofluorescent technique using antibodies against nine pancreatic enzymes (alpha-amylase, lipase, chymotrypsinogen A, trypsinogen, elastase, carboxypeptidase A and B, DNase and RNase A). These antibodies were specific to their antigens without cross reaction. By immunofluorescence, most acinar cells of the normal rat pancreas were positive to the nine enzymes tested. However, an inhomogeneity in the staining pattern was found; specifically, the cells located in the periinsular region of many islets showed a brighter fluorescence than acinar cells in the teleinsular tissue. These data add a new parameter to describe the inhomogeneity of the exocrine pancreas.

Volume 27, Issue 6, pp. 1029-1034, 06/01/1979
Copyright © 1979 by The Histochemical Society


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