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Growth of the parathyroid glands in omeprazole-treated chickens

Gagnemo Persson, Rebecca LU ; Håkanson, Rolf LU ; Sundler, Frank LU and Persson, Per (1993) In Scandinavian Journal of Gastroenterology 29(6). p.493-497
Abstract
BACKGROUND:
Omeprazole, a long-acting inhibitor of gastric acid secretion, is able to increase the circulating concentrations of gastrin. Daily treatment with high doses of omeprazole cause sustained hypergastrinemia. Long-standing hypergastrinemia can be expected to exert numerous effects in the body. For instance, gastrin has been proposed to promote growth in the digestive tract and pancreas. The present study is concerned with the effect of omeprazole on parathyroid glands in the chicken.
METHODS:
Chickens were treated with omeprazole (400 mumol/kg/day) in methylcellulose (2.5 ml/kg) for 5 or 10 weeks. Controls received vehicle. Blood calcium and serum gastrin concentrations were studied. The weight gain of the animals... (More)
BACKGROUND:
Omeprazole, a long-acting inhibitor of gastric acid secretion, is able to increase the circulating concentrations of gastrin. Daily treatment with high doses of omeprazole cause sustained hypergastrinemia. Long-standing hypergastrinemia can be expected to exert numerous effects in the body. For instance, gastrin has been proposed to promote growth in the digestive tract and pancreas. The present study is concerned with the effect of omeprazole on parathyroid glands in the chicken.
METHODS:
Chickens were treated with omeprazole (400 mumol/kg/day) in methylcellulose (2.5 ml/kg) for 5 or 10 weeks. Controls received vehicle. Blood calcium and serum gastrin concentrations were studied. The weight gain of the animals and of various organs (proventriculus, antrum, thyroids, parathyroids, ultimobranchial glands, and femur) were determined. The DNA content and the size of the parathyroid chief cells were also determined.
RESULTS:
Omeprazole reduced the body weight gain while greatly increasing the weight of the proventriculus and the parathyroid glands. The weight and density of the femur were reduced. The circulating concentrations of calcium were unaffected. The DNA content of the parathyroid glands was increased, and morphometric analysis of the parathyroid chief cells showed an increased cell size. Thus, the increased parathyroid gland weight seems to reflect both hypertrophy and hyperplasia. There was a slight increase in the weight of the ultimobranchial glands (expressed per kilogram body weight). The weight of the thyroids was unaffected (expressed in relation to body weight).
CONCLUSIONS:
The results indicate that omeprazole treatment in chickens leads not only to trophic effects in the acid-producing gastric mucosa (probably because of the ensuing hypergastrinemia), as reported earlier, but also to growth of the parathyroid glands (both hypertrophy and hyperplasia) and to bone loss without affecting blood calcium values. The mechanism behind these effects remains unknown.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Scandinavian Journal of Gastroenterology
volume
29
issue
6
pages
5 pages
publisher
Taylor & Francis
external identifiers
  • Scopus:0028453569
ISSN
1502-7708
DOI
10.3109/00365529409092460
language
English
LU publication?
yes
id
c9e9d8f5-0d9c-4e9f-96bb-4169b071027c
date added to LUP
2016-08-19 13:53:24
date last changed
2016-09-13 08:51:43
@misc{c9e9d8f5-0d9c-4e9f-96bb-4169b071027c,
  abstract     = {BACKGROUND: <br/>Omeprazole, a long-acting inhibitor of gastric acid secretion, is able to increase the circulating concentrations of gastrin. Daily treatment with high doses of omeprazole cause sustained hypergastrinemia. Long-standing hypergastrinemia can be expected to exert numerous effects in the body. For instance, gastrin has been proposed to promote growth in the digestive tract and pancreas. The present study is concerned with the effect of omeprazole on parathyroid glands in the chicken.<br/>METHODS: <br/>Chickens were treated with omeprazole (400 mumol/kg/day) in methylcellulose (2.5 ml/kg) for 5 or 10 weeks. Controls received vehicle. Blood calcium and serum gastrin concentrations were studied. The weight gain of the animals and of various organs (proventriculus, antrum, thyroids, parathyroids, ultimobranchial glands, and femur) were determined. The DNA content and the size of the parathyroid chief cells were also determined.<br/>RESULTS: <br/>Omeprazole reduced the body weight gain while greatly increasing the weight of the proventriculus and the parathyroid glands. The weight and density of the femur were reduced. The circulating concentrations of calcium were unaffected. The DNA content of the parathyroid glands was increased, and morphometric analysis of the parathyroid chief cells showed an increased cell size. Thus, the increased parathyroid gland weight seems to reflect both hypertrophy and hyperplasia. There was a slight increase in the weight of the ultimobranchial glands (expressed per kilogram body weight). The weight of the thyroids was unaffected (expressed in relation to body weight).<br/>CONCLUSIONS: <br/>The results indicate that omeprazole treatment in chickens leads not only to trophic effects in the acid-producing gastric mucosa (probably because of the ensuing hypergastrinemia), as reported earlier, but also to growth of the parathyroid glands (both hypertrophy and hyperplasia) and to bone loss without affecting blood calcium values. The mechanism behind these effects remains unknown.<br/>},
  author       = {Gagnemo Persson, Rebecca and Håkanson, Rolf and Sundler, Frank and Persson, Per},
  issn         = {1502-7708},
  language     = {eng},
  number       = {6},
  pages        = {493--497},
  publisher    = {ARRAY(0x8a9a5c0)},
  series       = {Scandinavian Journal of Gastroenterology},
  title        = {Growth of the parathyroid glands in omeprazole-treated chickens},
  url          = {http://dx.doi.org/10.3109/00365529409092460},
  volume       = {29},
  year         = {1993},
}