The aim of the present study was to investigate whether placental and fetal membrane AdM (adrenomedullin) mRNA expression changes with gestation and human labour, as we have previously found labour-associated changes in AdM content in fetal membranes [Al-Ghafra, Gude, Brennecke and King (2003) Clin. Sci. 105, 419–423]. Placentas and fetal membranes were collected either at term or pre-term from women either in-labour or not-in-labour, and AdM mRNA abundance was measured in tissue extracts by Northern blot analysis. Increases were found in the relative abundance of amniotic tissue AdM mRNA in both in-labour and not-in-labour groups at term compared with those at pre-term, and there were positive correlations with gestational age. Relative abundance of choriodecidual tissue AdM mRNA was also significantly elevated in the not-in-labour groups between pre-term and term tissues, although there was no significant correlation with gestational age. However, placental AdM mRNA expression was neither significantly increased at term (compared with pre-term) nor correlated with gestational age. In addition, there were significant increases in AdM mRNA in amnion and choriodecidua in the in-labour group compared with the not-in-labour group for both pre-term and term gestations. There was no difference in AdM mRNA in placental tissues between labour groups. In conclusion, the present study provides evidence that AdM production by fetal membranes is increased in amniotic and choriodecidual tissues at term, compared with pre-term, and in response to labour.
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Research Article|
February 10 2006
Expression of adrenomedullin mRNA is altered with gestation and labour in human placenta and fetal membranes
Alfia Al-Ghafra;
Alfia Al-Ghafra
*Department of Perinatal Medicine, Royal Women's Hospital, Carlton VIC 3053, Australia
†Department of Obstetrics and Gynaecology, University of Melbourne, Parkville, Australia
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Shaun P. Brennecke;
Shaun P. Brennecke
*Department of Perinatal Medicine, Royal Women's Hospital, Carlton VIC 3053, Australia
†Department of Obstetrics and Gynaecology, University of Melbourne, Parkville, Australia
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Roger G. King;
Roger G. King
‡Department of Pharmacology, Monash University, Clayton, VIC 3800, Australia
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Neil M. Gude
*Department of Perinatal Medicine, Royal Women's Hospital, Carlton VIC 3053, Australia
†Department of Obstetrics and Gynaecology, University of Melbourne, Parkville, Australia
Correspondence: Dr Neil M. Gude, at the Department of Perinatal Medicine, Royal Women's Hospital, 132 Grattan Street, Carlton, VIC 3053, Australia (email neil.gude@rwh.org.au).
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Clin Sci (Lond) (2006) 110 (3): 337–342.
Article history
Received:
October 06 2005
Revision Received:
November 21 2005
Accepted:
November 29 2005
Accepted Manuscript online:
November 29 2005
Citation
Alfia Al-Ghafra, Shaun P. Brennecke, Roger G. King, Neil M. Gude; Expression of adrenomedullin mRNA is altered with gestation and labour in human placenta and fetal membranes. Clin Sci (Lond) 1 March 2006; 110 (3): 337–342. doi: https://doi.org/10.1042/CS20050303
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