Antral G-cell in gastrin and gastrin-cholecystokinin knockout animals

Research output: Contribution to journalArticle

Abstract

The antral hormone gastrin is the key regulator of gastric acid secretion, mucosal growth and differentiation. Gastrin is synthesized in the endocrine G-cells in the antroduodenal mucosa. We have now examined the way in which the loss of gastrin alone or gastrin plus cholecystokinin (CCK) affects the antral G-cell. Immunohistochemistry, radioimmunoassay and quantitative real-time polymerase chain reaction techniques were employed to examine the expression of genes belonging to the G-cell secretory pathway in gastrin and gastrin-CCK knockout mice. Transmission electron microscopy was used to examine the ultrastructure of the G-cells. The number of G-cells increased but the secretory granules were few and abnormally small in the G-cells of both mouse models compared with wildtypes. Thus, gastrin is not necessary for the formation of G-cells as such but the lack of gastrin reduces the number and size of their secretory granules suggesting that gastrin is vital for the formation and/or maintenance of secretory granules in G-cells.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Cell Biology

Keywords

  • transgenic mice, ultrastructure, G-cells, secretion, gastrin, cholecystokinin
Original languageEnglish
Pages (from-to)141-146
JournalCell and Tissue Research
Volume321
Issue number1
Publication statusPublished - 2005
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Neuroendocrine Cell Biology (013212008)