Circulating gastrin is increased in hemochromatosis
Kelly A Smith1, Suzana Kovac, Gregory J Anderson
1University of Melbourne Department of Surgery, Austin Health, Level 8, Lance Townsend Building, Studley Road, Heidelberg, Vic. 3084, Australia.
FEBS Letters
|October 27, 2006
Summary
Iron overload, or hemochromatosis, is linked to higher gastrin levels in mice and humans. This finding suggests a new connection between iron status and the hormone gastrin, impacting iron homeostasis.
Area of Science:
- Endocrinology
- Gastroenterology
- Iron Metabolism
Background:
- Gastric acid secretion is crucial for intestinal iron absorption.
- Gastrin, a peptide hormone, influences gastric acid production in amidated and non-amidated forms.
- Non-amidated gastrins necessitate ferric ions for in vitro biological activity.
Purpose of the Study:
- To investigate the relationship between iron status and gastrin concentrations.
- To explore the role of hemochromatosis in altering gastrin levels.
Main Methods:
- Measurement of circulating gastrin concentrations.
- Analysis in Hfe(-/-) mice models of hemochromatosis.
- Assessment in human subjects with HFE-related hemochromatosis.
Main Results:
- Elevated gastrin concentrations were observed in the plasma and gastric mucosa of Hfe(-/-) mice.
- Increased gastrin levels were detected in the sera of human patients with HFE-related hemochromatosis.
Conclusions:
- A significant relationship exists between iron status and circulating gastrin concentrations.
- This discovery offers novel insights into the regulatory mechanisms of iron homeostasis.
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