Document Detail

Ovarian prostaglandin endoperoxide synthase: cellular localization during the rat estrous cycle.
MedLine Citation:
PMID:  2110838     Owner:  NLM     Status:  MEDLINE    
The specific cellular localization of prostaglandin endoperoxide (PGH) synthase was studied throughout the rat estrous cycle. Animals were necropsied at 1300 h on each day of the 4-day cycle, and an additional group was necropsied at 2300 h on proestrus. Ovaries were removed and processed for cellular identification of PGH synthase by immunohistochemistry. At all stages of the cycle, intense immunostaining was observed in newly formed corpora lutea. Luteal cells were immunoreactive, but the connective tissue centrum was unstained. Interstitial tissue contained heavily labeled cells, whereas the germinal epithelium exhibited faint staining. During estrus, metestrus, and diestrus, thecal cells from preantral and antral follicles contained PGH synthase immunoreactivity, but granulosa cells were unstained. Faint staining of mural granulosa cells was observed first in 78% of preovulatory follicles (less than 400-microns diameter) in ovaries collected on the afternoon of proestrus. After the luteinizing hormone surge, 95% of the preovulatory follicles exhibited PGH synthase staining. The percentage of immunoreactive granulosa cells in these preovulatory follicles increased 4-fold in ovaries collected at 2300 h on proestrus. The presence of ovarian PGH synthase throughout the rat estrous cycle and the changes in cellular localization may reflect the potential role of PGs in follicular and luteal function.
T E Curry; C Bryant; A C Haddix; M R Clark
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Biology of reproduction     Volume:  42     ISSN:  0006-3363     ISO Abbreviation:  Biol. Reprod.     Publication Date:  1990 Feb 
Date Detail:
Created Date:  1990-06-20     Completed Date:  1990-06-20     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0207224     Medline TA:  Biol Reprod     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  307-16     Citation Subset:  IM    
Department of Obstetrics and Gynecology, University of Kentucky, Lexington 40536.
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MeSH Terms
Estrus / metabolism*
Ovary / cytology,  enzymology*
Prostaglandin-Endoperoxide Synthases / metabolism*
Rats, Inbred Strains
Grant Support
Reg. No./Substance:
EC Synthases

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