Pregnancy-associated and placental proteins in the placental tissue of normal pregnant women and patients with pre-eclampsia at term.

Abstract

OBJECTIVE:

Pre-eclampsia is a placental disease of unknown cause. Maternal circulating concentrations of a number of protein markers are altered (mainly increased) in pre-eclampsia in comparison with controls of matched gestational age. Inhibin A and activin A were found to be elevated even before the onset of the disease. The aim of this study was to compare the levels of inhibin A, activin A: follistatin ratio, leptin, pregnancy-associated plasma protein-A (PAPP-A), human placental lactogen (HPL), placenta growth factor (PLGF) and pregnancy-specific beta1-glycoprotein (SP1) in placental extracts of normal pregnant women and pre-eclampsia patients at term.

METHODS:

Placental tissue from normal pregnancies (n=14) and patients with pre-eclampsia (n=13) were collected at term (> or =37 weeks of gestation) and stored at -80 degrees C. The frozen tissue pieces were homogenised and the above-mentioned proteins were measured by specific enzyme-linked immunosorbent assays.

RESULTS:

Placental contents of inhibin A and PAPP-A were significantly higher (P<0.05) in pre-eclampsia placental extracts compared with the controls. Activin A:follistatin ratio was higher (23) in pre-eclampsia extracts than in the controls (15). Leptin, PLGF, SP1 and HPL levels were not altered in the term pre-eclampsia placenta. Inhibin A and PAPP-A contents were increased in the placental extracts of pre-eclampsia patients.

CONCLUSION:

Our data suggest that the placenta, possibly by a compensatory mechanism, is at least in part responsible for the altered serum levels observed in pre-eclampsia.

• Authors: Nick A Bersinger, Nigel Groome, Shanthi Muttukrishna
• Journal: European journal of endocrinology (Eur J Endocrinol) Vol. 147 Issue 6 Pg. 785-93 (Dec 2002) ISSN: 0804-4643 [Print] England
• PMID: 12457454 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Pregnancy Proteins

Topics

• Adult
• Delivery, Obstetric
• Female
• Humans
• Placenta (metabolism)
• Pre-Eclampsia (metabolism)
• Pregnancy (metabolism)
• Pregnancy Proteins (metabolism)
• Reference Values