Progesterone stimulates pancreatic cell proliferation in vivo (original) (raw)
Journal Article
,
Division of Reproductive Biology, Department of Obstetrics and Gynaecology, University of Groningen
,
Hanzeplein 1, NL-9713 GZ Groningen
,
The Netherlands
Correspondence should be addressed to A Nieuwenhuizen
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Division of Reproductive Biology, Department of Obstetrics and Gynaecology, University of Groningen
,
Hanzeplein 1, NL-9713 GZ Groningen
,
The Netherlands
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Division of Reproductive Biology, Department of Obstetrics and Gynaecology, University of Groningen
,
Hanzeplein 1, NL-9713 GZ Groningen
,
The Netherlands
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Division of Reproductive Biology, Department of Obstetrics and Gynaecology, University of Groningen
,
Hanzeplein 1, NL-9713 GZ Groningen
,
The Netherlands
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Division of Reproductive Biology, Department of Obstetrics and Gynaecology, University of Groningen
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Hanzeplein 1, NL-9713 GZ Groningen
,
The Netherlands
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Department of Endocrinology and Reproduction, Erasmus University
,
Rotterdam
,
The Netherlands
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Accepted:
04 December 1998
Cite
A G Nieuwenhuizen, G A Schuiling, S M S Liem, H Moes, T R Koiter, J T Uilenbroek, Progesterone stimulates pancreatic cell proliferation in vivo, European Journal of Endocrinology, Volume 140, Issue 3, Mar 1999, Pages 256–263, https://doi.org/10.1530/eje.0.1400256
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Abstract
Treatment of cyclic and pregnant rats with progesterone stimulates cell proliferation within the islets of Langerhans. It was investigated whether this effect of progesterone depends on sex and/or the presence of the gonads or the presence of oestradiol. For this purpose, Silastic tubes containing progesterone were inserted s.c. in intact and gonadectomized male and female rats, and in gonadectomized female rats treated with oestradiol. After 6 days of progesterone treatment, rats were infused for 24 h with 5-bromo-2'-deoxyuridine (BrdU) and dividing cells were identified in pancreatic sections by immunostaining for BrdU. Progesterone treatment increased islet-cell proliferation in intact male and female rats (P < 0.05), but not in gonadectomized male and female rats or in gonadectomized female rats supplemented with oestradiol. Furthermore, in intact male and female rats, progesterone treatment also stimulated cell proliferation in extra-islet pancreatic tissue (P < 0.05). Identification of the proliferating cells, by double-immunocytochemistry, revealed that progesterone treatment stimulated proliferation of both alpha and beta cells within the pancreatic islets. In extra-islet pancreatic tissue, progesterone treatment stimulated proliferation in both duct (cytokeratin 20-immunoreactive) and non-duct cells. Progesterone treatment did not increase the number of single glucagon or insulin-containing cells outside the pancreatic islets, nor that of cytokeratin 20/insulin double-positive cells, suggesting that progesterone treatment did not stimulate differentiation of duct cells into endocrine cells. Progesterone treatment did not affect insulin responses to an i.v. glucose load (0.5 g/kg body weight). It is concluded that progesterone stimulates pancreatic cell proliferation indirectly; gonadal factor(s), not identical to oestradiol, is (are) probably involved.
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© 1999 Society of the European Journal of Endocrinology
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