Elevated expression of CYP1A1 and y-SYNUCLEIN in human ectopic (ovarian) endometriosis compared with eutopic endometrium.

Singh, Maneesh N. and Stringfellow, Helen F. and Taylor, Siân E. and Ashton, Kate M. and Ahmad, Mushfika and Abdo, Khalil R. and El-Agnaf, Omar M. A. and Martin-Hirsch, Pierre L. and Martin, Frank L. (2008) Elevated expression of CYP1A1 and y-SYNUCLEIN in human ectopic (ovarian) endometriosis compared with eutopic endometrium. Molecular Human Reproduction, 14 (11). pp. 655-663. ISSN 1460-2407

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Endometriosis is a debilitating disease in which apoptotic, genetic, immunological, angiogenic and environmental factors have been implicated. Endocrine-disrupting agents (e.g. dioxins) might be involved. Dioxins, via the arylhydrocarbon receptor (AhR), induce estrogen-metabolizing enzymes CYP1A1 and CYP1B1. Elevated expression of -SYNUCLEIN (-SYN) has been associated with hormone-related conditions. Tissue sets consisting of eutopic and ectopic (ovarian) endometrium from patients with stage 3 or 4 endometriosis were obtained. Following RNA extraction and reverse transcription, quantitative real-time reverse transcriptase–polymerase chain reaction was performed for anti-apoptotic B-cell leukaemia/lymphoma 2 (BCL-2), CYP1A1, CYP1B1, estrogen receptor (ER), ERβ and -SYN. Immunohistochemical analyses for -syn, ER, ERβ and CYP1A1 were also conducted. A 3–9-fold increase in intra-individual expression of CYP1A1 in ectopic (ovarian) endometrium compared with eutopic tissue was observed; immunohistochemical analyses pointed to CYP1A1 being localized to the glandular epithelium. This intra-individual expression profile was not observed for CYP1B1 or BCL-2. However, a 5–53-fold intra-individual increase in -SYN expression was also demonstrated in six of nine tissue sets (a further two showed an increase that was not considered significant) when comparing ectopic to eutopic endometrium; -syn positivity was associated with endothelial cells. An elevation in ERβ was also noted when comparing ectopic to eutopic endometrium; with regard to ER, this was inconsistent. These results suggest an up-regulation of dioxin-inducible CYP1A1 and -SYN occurs in endometriosis. Whether -syn may be a novel diagnostic marker for endometriosis remains to be ascertained.

Item Type:
Journal Article
Journal or Publication Title:
Molecular Human Reproduction
Uncontrolled Keywords:
?? -synucleincell biologydevelopmental biologygeneticsmolecular biologyobstetrics and gynaecologyreproductive medicineembryologyge environmental sciences ??
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Deposited On:
13 Jan 2010 14:06
Last Modified:
15 Jul 2024 10:43