Change search
ReferencesLink to record
Permanent link

Direct link
Labour induces increased concentrations of biglycan and hyaluronan in human fetal membranes
Show others and affiliations
2007 (English)In: Placenta, ISSN 0143-4004, E-ISSN 1532-3102, Vol. 28, no 5-6, 482-486 p.Article in journal (Refereed) PublishedText
Abstract [en]

Objective: The proteoglycan decorin stabilizes collagen whereas biglycan and hyaluronan disrupt well-organized collagen. The aim was to compare hyaluronan and proteoglycans in human fetal membranes obtained before and after spontaneous labour at term.

Study design: Prelabour samples of fetal membranes (N = 9) were obtained from elective caesarean sections and regionally sampled from over the cervix (cervical membranes) and mid-zone samples between this area and the placental edge. Postlabour samples (N = 11) were obtained from spontaneous vaginal delivery and also regionally sampled. Amnion and chorio-decidua were analysed separately. The proteoglycans decorin and biglycan were analysed using alcian blue precipitation, SDS polyacrylamide gel electrophoresis and immunostaining. Hyaluronan was analysed using a radioimmunoassay and by histochemistry. Collagen was measured by estimating hydroxyproline content.

Results: In prelabour membranes the biglycan concentration (mu g/mg wtw) in the cervical amnion was 40% lower than in the mid-zone amnion (P < 0.05). After delivery the cervical amnion showed a twofold increase in biglycan (P < 0.05), a 30% decrease in collagen (P < 0.05), and a 50% decrease in decorin concentration (P < 0.05). In mid-zone samples after delivery the concentrations of hyaluronan showed an increase form 1.0 to 4.9 mu g/mg wtw (P < 0.05). Histology demonstrated a gelatinous substance, which separated amnion and chorio-decidua, in particular at the cervical site. This gelatinous substance contained hyaluronan at a concentration of 3.0 mu g/mg wtw.

Conclusion: It is well established that prelabour fetal membranes are considerably stronger than postlabour fetal membranes. Two features may explain this; a weakening of the amnion combined with a separation of amnion and chorio-decidua. The biomechanical changes are consistent with the decrease in collagen and decorin, and the increase in hyaluronan and biglycan demonstrated in this study. The separation of the membranes is caused by the formation of a gelatinous substance, rich in hyaluronan. The results indicate that the biomechanical changes are not merely secondary to the stress of labour but that an active maturation process is involved.

Place, publisher, year, edition, pages
London: Saunders Elsevier, 2007. Vol. 28, no 5-6, 482-486 p.
Keyword [en]
decorin, biglycan, rupture of membranes, collagen, aranion, chorio-decidua, labour
National Category
Developmental Biology Obstetrics, Gynecology and Reproductive Medicine
URN: urn:nbn:se:umu:diva-118207DOI: 10.1016/j.placenta.2006.09.006ISI: 000246449700015PubMedID: 17125833OAI: diva2:918714
Available from: 2016-04-11 Created: 2016-03-14 Last updated: 2016-04-11Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Laurent, Claude
By organisation
In the same journal
Developmental BiologyObstetrics, Gynecology and Reproductive Medicine

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 9 hits
ReferencesLink to record
Permanent link

Direct link