Cell and Tissue Research

, Volume 260, Issue 1, pp 117–122 | Cite as

Cellular localization of intrinsic factor in pancreas and stomach of the dog

  • C. Vaillant
  • N. U. Horadagoda
  • R. M. Batt
Article

Summary

A cobalamin (vitamin B12)-binding protein has recently been identified in canine pancreatic juice which is biochemically, immunochemically and functionally similar to canine gastric intrinsic factor. However, the cellular sources of both this pancreatic intrinsic factor and gastric intrinsic factor in the dog are not known. Antisera raised against canine gastric intrinsic factor have been used to examine the distribution of intrinsic factors in the canine pancreas and stomach. Immunoreactivity was demonstrated in duct cells but not acinar or endocrine cells in the pancreas, and in fundic peptic and pyloric gastric pit cells in stomach. All immunostaining was abolished by preabsorption of the antisera with purified canine gastric and pancreatic intrinsic factors. A cellular source of pancreatic intrinsic factor has not been previously described, and the demonstration of intrinsic factor-like immunoreactivity in two cell types in the canine stomach contrasts with its localization in a single cell type in the gastric mucosa of other mammalian species. Furthermore, immunoreactivity in pancreatic duct cells was detected at much higher dilutions of antisera than those required for staining of peptic and gastric pit cells. This suggests a higher concentration of antigen, and supports previous evidence that the pancreas is a major source of intrinsic factor in the dog.

Key words

Intrinsic factor Pancreas Pancreatic intrinsic factor Stomach Immunohistochemistry Dog 

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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • C. Vaillant
    • 1
    • 2
  • N. U. Horadagoda
    • 1
    • 2
  • R. M. Batt
    • 1
    • 2
  1. 1.Department of Veterinary Preclinical SciencesUniversity of LiverpoolLiverpoolUnited Kingdom
  2. 2.Department of Veterinary PathologyUniversity of LiverpoolLiverpoolUnited Kingdom

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