Article (Scientific journals)
Absence of aromatase protein and mRNA expression in endometriosis.
Colette, S.; Lousse, J. C.; Defrère, S. et al.
2009In Human Reproduction, 24 (9), p. 2133-41
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Keywords :
aromatase/peritoneal; endometriosis/ovarian; endometriosis/rectovaginal; endometriosis
Abstract :
[en] BACKGROUND: Aromatase has been reported to be involved in estrogen biosynthesis and expressed in eutopic and ectopic endometrium of endometriosis patients. The objective of the present study was to investigate its expression and localization in three distinct types of endometriosis. METHODS: Human peritoneal, ovarian and rectovaginal endometriotic lesions and matched eutopic endometrium were collected from patients during laparoscopy. Aromatase protein localization (immunohistochemistry, n = 63) and mRNA expression [quantitative polymerase chain reaction (Q-PCR), n = 64] were assessed. RESULTS: No aromatase protein was detected by immunohistochemistry in either the glandular or stromal compartment of endometriotic lesions or eutopic endometrium, while it was strong in placental syncytiotrophoblasts, granulosa and internal theca cells from pre-ovulatory follicles, and luteal cells from corpus luteum. By Q-PCR, low but discernible levels of aromatase expression were found in endometriomas, probably due to follicular expression. Transcripts for aromatase were barely detectable in only a few peritoneal and rectovaginal endometriotic lesions, and a few eutopic endometrium samples, probably due to contaminating surrounding tissues (adipose tissue, intact peritoneum). CONCLUSIONS: Unlike previous studies, we observed no aromatase protein in any of the endometriosis types, and barely detectable aromatase mRNA expression, suggesting that locally produced aromatase (within endometriotic lesions) may be less implicated in endometriosis development than previously postulated. Potential factors responsible for these discrepancies are discussed.
Disciplines :
Reproductive medicine (gynecology, andrology, obstetrics)
Anatomy (cytology, histology, embryology...) & physiology
Author, co-author :
Colette, S.
Lousse, J. C.
Defrère, S.
Curaba, M.
Heilier, J. F.
Van Langendonckt, A.
Mestdagt, Mélanie ;  Université de Liège - ULiège > Département des sciences cliniques > Labo de biologie des tumeurs et du développement
Foidart, Jean-Michel ;  Université de Liège - ULiège > Département des sciences cliniques > Gynécologie - Obstétrique - Labo de biologie des tumeurs et du développement
Loumaye, E.
Donnez, J.
Language :
English
Title :
Absence of aromatase protein and mRNA expression in endometriosis.
Publication date :
2009
Journal title :
Human Reproduction
ISSN :
0268-1161
eISSN :
1460-2350
Publisher :
Oxford University Press, Oxford, United Kingdom
Volume :
24
Issue :
9
Pages :
2133-41
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 February 2010

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