Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/46664
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Metabolism of Synthetic Steroids by the Human Placenta |
Author: | Murphy, V. Fittock, R. Zarzycki, P. Delahunty, M. Smith, R. Clifton, V. |
Citation: | Placenta, 2007; 28(1):39-46 |
Publisher: | W B Saunders Co Ltd |
Issue Date: | 2007 |
ISSN: | 0143-4004 1532-3102 |
Statement of Responsibility: | Murphy VE, Fittock RJ, Zarzycki PK, Delahunty MM, Smith R, Clifton VL. |
Abstract: | Pregnant women with asthma are frequently exposed to synthetic glucocorticoids and glucocorticoids are known to reduce fetal growth. The fetus is normally protected from the harmful effects of maternally derived glucocorticoids by the placental enzyme 11beta-hydroxysteroid dehydrogenase type 2 (11beta-HSD2). Whether 11beta-HSD2 inactivates the synthetic glucocorticoids used for asthma treatment during pregnancy (budesonide, beclomethasone dipropionate and fluticasone propionate) remains unknown. To investigate the relationship between steroid use during pregnancy and fetal growth and development, pregnant women with (n=119) and without asthma (n=84) were followed throughout pregnancy. Data on asthma medication use, neonatal size at birth, placental weight and cord blood cortisol and estriol were collected. Placental tissue samples were collected from non-asthmatic women (n=8) for metabolism studies. Placental 11beta-HSD2 activity was determined using beclomethasone dipropionate, budesonide, fluticasone propionate, prednisolone, dexamethasone and betamethasone as steroid substrates. Steroids and their oxidised metabolites were examined using thin layer chromatography and densitometry. Placental 11beta-HSD2 metabolised beclomethasone, prednisolone, dexamethasone and betamethasone, but not budesonide or fluticasone. No association between the use of inhaled steroids for asthma treatment during pregnancy and alterations in neonatal size, placental weight, gestational age at delivery, or umbilical vein estriol concentrations was demonstrated compared to non-asthmatic women. In conclusion, the use of inhaled steroids for asthma treatment does not affect fetal growth, despite differences in placental metabolism by 11beta-HSD2. |
Keywords: | Pituitary-Adrenal System Hypothalamo-Hypophyseal System Placenta Humans Asthma Pregnancy Complications Steroids Anti-Asthmatic Agents Administration, Inhalation Prospective Studies Fetal Development Pregnancy Models, Biological Female |
Description: | © 2006 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.placenta.2005.12.010 |
Description (link): | http://www.ncbi.nlm.nih.gov/pubmed/16549198 |
Published version: | http://dx.doi.org/10.1016/j.placenta.2005.12.010 |
Appears in Collections: | Aurora harvest Physiology publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.