| Changes in circulating concentrations of inhibins A and pro-alpha C during first trimester medical termination of pregnancy. | |
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MedLine Citation:
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PMID: 12660265 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Both inhibin A and inhibin pro-alpha C are detectable in the circulation in increasing amounts during establishment of pregnancy. However, their origins and functions remain to be elucidated. We have studied levels of inhibin A and inhibin pro-alpha C in serum samples collected at various stages during medical termination of pregnancy with consecutive use of mifepristone and misoprostol. METHODS: Samples were collected from three groups of patients at different weeks of gestation (group A: 6-7 weeks, n = 6; group B: 7-8 weeks, n = 6; group C: 8-9 weeks, n = 6) at the time of administration of oral mifepristone, 48 h later just before administration of vaginal misoprostol and again soon after expulsion of the products of conception. Plasma concentrations of inhibin A and pro-alpha C were assayed using specific and sensitive enzyme-linked immunosorbent assays. Results were correlated with concentrations of hCG and progesterone. RESULTS: We observed a significant fall in plasma concentration of inhibin pro-alpha C following administration of mifepristone, which continued after administration of misoprostol. In contrast mifepristone had no effect on plasma levels of inhibin A, which fell steeply only after administration of misoprostol. CONCLUSIONS: These results suggest dissociation between major sources of inhibin A and inhibin pro-alpha C in early pregnancy. Treatment with mifepristone, a competitive antagonist of the progesterone receptor, resulted in a significant and rapid fall in concentrations of inhibin pro-alpha C, identifying a link between production of pro-alpha C and luteal steroidogenesis. In contrast, concentrations of inhibin A did not fall after mifepristone, identifying a predominantly feto-placental origin in early human pregnancy. |
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Authors:
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S Lahiri; C J Anobile; P Stewart; W L Ledger |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Human reproduction (Oxford, England) Volume: 18 ISSN: 0268-1161 ISO Abbreviation: Hum. Reprod. Publication Date: 2003 Apr |
Date Detail:
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Created Date: 2003-03-27 Completed Date: 2003-12-02 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 8701199 Medline TA: Hum Reprod Country: England |
Other Details:
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Languages: eng Pagination: 744-8 Citation Subset: IM |
Affiliation:
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Academic Unit of Obstetrics and Gynaecology, University Department of Reproductive and Developmental Medicine, The Jessop Wing, Tree Root Walk, Sheffield S10 2SF, UK. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Abortifacient Agents, Steroidal
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administration & dosage Abortion, Induced* Administration, Intravaginal Administration, Oral Chorionic Gonadotropin / blood Drug Administration Schedule Enzyme-Linked Immunosorbent Assay Female Hormone Antagonists / administration & dosage Humans Inhibins / blood* Mifepristone / administration & dosage Osmolar Concentration Pregnancy / blood* Pregnancy Trimester, First Progesterone / blood Protein Precursors / blood* |
| Chemical | |
Reg. No./Substance:
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0/Abortifacient Agents, Steroidal; 0/Chorionic Gonadotropin; 0/Hormone Antagonists; 0/Protein Precursors; 0/inhibin A; 0/inhibin-alpha subunit precursor; 57-83-0/Progesterone; 57285-09-3/Inhibins; 84371-65-3/Mifepristone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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