Document Detail


Clomiphene citrate modulates the expression of endometrial carbohydrates (especially N-acetyl-d-glucosamine and sialic acid) in pseudopregnant rats.
MedLine Citation:
PMID:  18514805     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study investigated the presence of carbohydrates N-acetyl-d-glucosamine and sialic acid oligosaccharides, in the uterine epithelium of pseudopregnant rats treated with ovarian hormones and Clomiphene citrate (CC) a commonly used fertility drug associated with low pregnancy rates. Ovariectomized sexually mature rats were given 0.25mg CC prior to the implantation-priming hormone sequence of 5mg progesterone for 3 days and a single dose of 0.5microg estradiol-17beta (E(2)) on day 3 (PP(PE)) and sacrificed 24h after the last hormone treatment. Uterine tissue was incubated with the lectin Triticum vulgare (wheat germ agglutinin, WGA), associated with avidin and subsequently labelled with biotinylated-ferritin for electron microscopy, a combined alcian blue/PAS technique for light microscopy and RT-PCR was run for progesterone-associated endometrial protein (PAEP) gene, a pregnancy related endometrial gene that is associated with the protein thought to express carbohydrates in the uterus and suppress immune function. The results indicate that CC administration decreases the expression of these carbohydrates both at a cellular level and genetic level when compared to the PP(PE) group. However, the lowest expression of N-acetyl-d-glucosamine and sialic acid was seen in the placebo group. The ovarian hormones were therefore shown to be important for the synthesis of these carbohydrates that are important in the implantation period and the maintenance of pregnancy. The results suggest that the effect of CC on the expression of N-acetyl-d-glucosamine and sialic acid is a significant reason why there are low pregnancy rates with CC use.
Authors:
T Khoza; M Hosie
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-06-02
Journal Detail:
Title:  Theriogenology     Volume:  70     ISSN:  0093-691X     ISO Abbreviation:  Theriogenology     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-08-01     Completed Date:  2008-10-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0421510     Medline TA:  Theriogenology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  612-21     Citation Subset:  IM    
Affiliation:
School of Anatomical Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
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MeSH Terms
Descriptor/Qualifier:
Acetylglucosamine / metabolism*
Animals
Clomiphene / pharmacology*
Endometrium / drug effects*,  metabolism
Female
Histocytochemistry
Lectins / metabolism
Microscopy, Electron
N-Acetylneuraminic Acid / metabolism*
Pseudopregnancy*
Rats
Rats, Wistar
Reverse Transcriptase Polymerase Chain Reaction
Selective Estrogen Receptor Modulators / pharmacology*
Chemical
Reg. No./Substance:
0/Lectins; 0/Selective Estrogen Receptor Modulators; 131-48-6/N-Acetylneuraminic Acid; 7512-17-6/Acetylglucosamine; 911-45-5/Clomiphene

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


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