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Prostaglandin E2-regulated cervical ripening: analysis of proteoglycan expression in the rat cervix.

Abstract：

OBJECTIVE:Prostaglandins reduce cervical resistance by reorganizing collagen fibrils. Proteoglycans are involved in collagen fibril organization and structure. We evaluated the changes in proteoglycan composition induced by prostaglandin E(2) (PGE(2)). STUDY DESIGN:Prostaglandins were administered intravaginally to induce cervical ripening in timed pregnant Sprague-Dawley rats. Changes in proteoglycan messenger ribonucleic acid (mRNA) expression were measured using reverse transcription (RT-PCR) for core protein. Fluorophore assisted carbohydrate gel electrophoresis (FACE) was used to evaluate proteoglycan glycosaminoglycan composition along with size exclusion high-performance liquid chromatography (HPLC). RESULTS:No change in core protein mRNA expression was detected after PGE(2) treatment. Total glycosaminoglycan (GAG) decreased more than 20% after PGE(2) (P = .02). FACE demonstrated a shift in disaccharide subunit composition after PGE(2), with a decrease in 4-sulfated disaccharides (P = .02). HPLC confirmed a decrease in total GAG (P = .04). CONCLUSION:Although there was no change in core protein mRNA expression, alterations in GAG composition was detected after PGE(2). The decrease in sulfated GAG could decrease electrostatic interactions that would weaken interfibrillar interactions. These findings would be consistent with a decline in cervical resistance.

journal_name

Am J Obstet Gynecol

journal_title

American journal of obstetrics and gynecology

authors

Ji H,Dailey TL,Long V,Chien EK

doi

10.1016/j.ajog.2007.11.024

subject

Has Abstract

pub_date

2008-05-01 00:00:00

pages

536.e1-7

issue

5

eissn

0002-9378

issn

1097-6868

pii

S0002-9378(07)02135-7

journal_volume

198

pub_type

杂志文章

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