Progesterone receptor in Norplant endometrium
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⤵ 3 in-corpus citations
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Norplant endometria showed increased progesterone receptor protein but decreased mRNA, with cathepsin D indicating non-functional receptors, and differing receptor mRNA levels correlated with amenorrhea versus bleeding.
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Abstract
Endometrial progesterone receptor plays an important role in determining the biological activity of progestogens in fertility regulation. Studies during the normal menstrual cycle have shown that the concentrations of endometrial progesterone receptor and its mRNA vary in glandular epithelia but remain steady in stromal cells. There is general agreement between progesterone receptor mRNA and protein levels during the normal menstrual cycle. Norplant endometrium had an increase in immunoreactive progesterone receptor concentration but a reduction in progesterone receptor mRNA levels compared with controls. An immunohistochemical study, using the expression of the lysosomal protease cathepsin D as a marker for the functional status of progesterone receptors, failed to confirm the functionality of the receptors in Norplant endometrium. Together, these results suggest that (i) there is a differential sensitivity of glandular and stromal progesterone receptors to steroid regulation during the normal menstrual cycle; (ii) there appears to be a dissociation between the concentrations of progesterone receptor and its mRNA in Norplant endometrium; and (iii) there was significantly more progesterone receptor mRNA and lower plasma oestrogen concentrations in Norplant subjects with amenorrhoea than with endometrial bleeding. The clinical significance of the differences in progesterone receptor mRNA levels and plasma oestrogen concentrations between the amenorrhoea group and the bleeding group requires further investigation.
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Too few in-corpus citations on either side for a chart; here are the lists.
Cites (2)
- Immunohistochemical analysis of estrogen and progesterone receptors in endometriosis: comparison with normal endometrium during the menstrual cycle and the effect of medical therapy 1989
- Ovarian steroid receptor expression in endometriosis and in two potential parent epithelia: endometrium and peritoneal mesothelium 1992
Cited by (3)
- Decreased tissue inhibitor of metalloproteinase in the endometrium of women using depot medroxyprogesterone acetate: a role for altered endometrial matrix metalloproteinase/tissue inhibitor of metalloproteinase balance in the pathogenesis of abnormal uterine bleeding? 2002
- Unexplained infertility patients present the mostly impaired levels of progesterone receptors: Prospective observational study 2018
- Estrogen receptor, progesterone receptor and CD8+ expression in endometrium of women of unexplained infertility 2018
References (15)
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Cited by (3)
- Estrogen receptor, progesterone receptor and CD8+ expression in endometrium of women of unexplained infertility 2018
- Unexplained infertility patients present the mostly impaired levels of progesterone receptors: Prospective observational study 2018
- Decreased tissue inhibitor of metalloproteinase in the endometrium of women using depot medroxyprogesterone acetate: a role for altered endometrial matrix metalloproteinase/tissue inhibitor of metalloproteinase balance in the pathogenesis of abnormal uterine bleeding? 2002
Source provenance
- openalex
- last seen: 2026-06-10T17:14:06.276822+00:00
- pubmed
- last seen: 2026-10-08T22:00:02.201502+00:00
- unpaywall
- last seen: 2026-10-27T06:37:41.825712+00:00
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