Summary
Treatment of chickens, hamsters and guinea-pigs with large doses of the long-acting antisecretory agent omeprazole for 10 weeks resulted in elevated serum gastrin levels and in increased stomach weight and mass of oxyntic mucosa. Also the antral gastrin cell density was increased. Another striking effect was the hyperplasia of the histamine-producing enterochromaffin-like (ECL) cells — a prominent endocrine cell population with unknown function — in the oxyntic mucosa. Accordingly, the gastric mucosal histamine concentration and rate of histamine formation were increased in all three species. The results suggest that marked and long-lasting suppression of acid secretion leads to elevated serum gastrin levels and diffuse ECL cell hyperplasia not only in the rat, as previously seen, but also in the chicken, hamster and guinea-pig; this hyperplasia is associated with accelerated histamine formation in all three species. The following sequence of events is suggested to occur in mammalian as well as submammalian vertebrates: suppression of acid secretion — hypergastrinaemia — ECL cell hyperplasia.
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Axelson, J., Håkanson, R., Rosengren, E. et al. Hypergastrinaemia induced by acid blockade evokes enterochromaffin-like (ECL) cell hyperplasia in chicken, hamster and guinea-pig stomach. Cell Tissue Res. 254, 511–516 (1988). https://doi.org/10.1007/BF00226500
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DOI: https://doi.org/10.1007/BF00226500