Document Detail

Amniotic fluid levels of immunoreactive monocyte chemotactic protein-1 increase during term parturition.
MedLine Citation:
PMID:  14563093     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Parturition is characterized by an influx of inflammatory cells into gestational tissues, a phenomenon conducive to increased myometrial contractility, cervical ripening and decidual/membrane activation. Monocyte chemotactic protein-1 (MCP-1), a potent chemoattractant and activator of monocytes/macrophages, is expressed in gestational tissues and, thus, may participate in the final common pathway of labor. This study was undertaken to determine whether the amniotic fluid concentrations of immunoreactive MCP-1 are altered with gestational age or spontaneous labor at term with and without prelabor rupture of the gestational membranes. We also sought to identify intrapartum differences in the concentrations of immunoreactive MCP-1 between the upper and lower amniotic fluid compartments. METHODS: A cross-sectional study was conducted to assess the concentrations of immunoreactive MCP-1 in amniotic fluid. Amniotic fluid samples were obtained from 225 women as follows: (1) women undergoing mid-trimester (14-18 weeks of gestation) amniocentesis for genetic indications, whose pregnancy outcome was normal (n = 84); (2) women in labor (n = 52) and not in labor (n = 31) at term, with intact gestational membranes; (3) women with rupture of the gestational membranes in labor (n = 18) and not in labor (n = 26), at term; and (4) women in labor at term for whom paired amniotic fluid samples were obtained through transvaginal and transabdominal amniocenteses (n = 14). Immunoreactive MCP-1 was assessed with a specific and sensitive immunoassay that had been validated for amniotic fluid. Non-parametric statistics were used for analysis. RESULTS: Immunoreactive MCP-1 was detected in all amniotic fluid samples. Spontaneous human parturition was associated with a significant increase in the amniotic fluid concentrations of immunoreactive MCP-1 (not in labor: median 595 pg/ml, range 183-3579 pg/ml vs. in labor: median 862 pg/ml, range 183-9609 pg/ml; p = 0.01). The median amniotic fluid concentrations of immunoreactive MCP-1 were significantly higher in the lower amniotic fluid compartment than in the upper amniotic fluid compartment (lower compartment: median 2913 pg/ml, range 1360-17080 pg/ml vs. upper compartment: median 1603 pg/ml, range 1070-8062 pg/ml; p = 0.004.). Spontaneous rupture of the gestational membranes at term was not associated with a significant change in the amniotic fluid concentrations of immunoreactive MCP-1. CONCLUSIONS: Immunoreactive MCP-1 is a physiological constituent of the amniotic fluid. The amniotic fluid levels of immunoreactive MCP-1 increase during spontaneous labor at term. A topographic difference in the concentration of immunoreactive MCP-1 was observed in the amniotic cavity, with higher concentrations being noted in the lower amniotic fluid compartment, as compared with the upper amniotic fluid compartment. These findings support the hypothesis that MCP-1 may play a role in the final common pathway of spontaneous labor.
M S Esplin; R Romero; T Chaiworapongsa; Y M Kim; S Edwin; R Gomez; R Gonzalez; E Y Adashi
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians     Volume:  14     ISSN:  1476-7058     ISO Abbreviation:  J. Matern. Fetal. Neonatal. Med.     Publication Date:  2003 Jul 
Date Detail:
Created Date:  2003-10-17     Completed Date:  2003-11-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  101136916     Medline TA:  J Matern Fetal Neonatal Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  51-6     Citation Subset:  IM    
Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, Utah, USA.
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MeSH Terms
Amniotic Fluid / metabolism*
Case-Control Studies
Chemokine CCL2 / metabolism*
Cross-Sectional Studies
Fetal Membranes, Premature Rupture / metabolism*
Gestational Age*
Labor, Obstetric / metabolism*
Pregnancy Trimester, Second / metabolism
Pregnancy Trimester, Third / metabolism
Reg. No./Substance:
0/Chemokine CCL2

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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