Document Detail


Mechanisms Leading to Increased Risk of Preterm Birth in Growth-Restricted Guinea Pig Pregnancies.
MedLine Citation:
PMID:  23885103     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Intrauterine growth restriction (IUGR) is a risk factor for preterm labor; however, the mechanisms of the relationship remain unknown. Prostaglandin (PG), key stimulants of labor, availability is regulated by the synthetic enzymes, prostaglandin endoperoxidases 1 and 2 (PTGS1 and 2), and the metabolizing enzyme, 15-hydroxyprostaglandin dehydrogenase (HPGD). We hypothesized that IUGR increases susceptibility to preterm labor due to the changing balance of synthetic and metabolizing enzymes and hence greater PG availability. We have tested this hypothesis using a surgically induced IUGR model in guinea pigs, which results in significantly shorter gestation. Myometrium, amnion, chorion, and placentas were collected from sham operated or IUGR pregnancies, and PTGS1 and HPGD protein expression were quantified throughout late gestation (>62 days) and labor. The PTGS1 expression was significantly upregulated in the myometrium of IUGR animals, and chorionic HPGD expression was markedly decreased (P < .01 and P < .001, respectively). These findings suggest a shift in the balance of PG production over metabolism in IUGR pregnancies leads to a greater susceptibility to preterm birth.
Authors:
Hannah K Palliser; Meredith A Kelleher; Toni N Welsh; Tamas Zakar; Jonathan J Hirst
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-7-24
Journal Detail:
Title:  Reproductive sciences (Thousand Oaks, Calif.)     Volume:  -     ISSN:  1933-7205     ISO Abbreviation:  Reprod Sci     Publication Date:  2013 Jul 
Date Detail:
Created Date:  2013-7-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101291249     Medline TA:  Reprod Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1School of Biomedical Sciences and Pharmacy, University of Newcastle, New South Wales, Australia.
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