Deoxyribonucleic acid methyltransferases and methyl-CpG-binding domain proteins in human endometrium and endometriosis

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Abstract

Objective: To determine [1] expression levels of both DNA methyltransferases (DNMTs) and methyl-CpG-binding domain proteins (MBDs) in human endometrium throughout the menstrual cycle and in eutopic and ectopic endometrium of patients with endometriosis and [2] hormone responsiveness of DNMT and MBD expression in explant cultures of proliferative phase endometrium. Design: In vitro study. Setting: Academic medical center. Patient(s): Premenopausal women with and without endometriosis. Intervention(s): Explant cultures of proliferative phase endometrium were treated with vehicle, 17β-E2, or a combination of E2 and P (E2 + P) for 24 hours. Main Outcome Measure(s): Expression levels of DNMT1, DNMT2, and DNMT3B and MBD1, MBD2, and MeCP2 with use of real-time quantitative polymerase chain reaction. Result(s): Expression levels of DNMT1 and MBD2 were significantly higher in secretory-phase endometrium compared with proliferative endometrium and menstrual endometrium. In explant cultures, treatment with E2 + P resulted in significant up-regulation of DNMT1 and MBD2. Expression levels of several DNMTs and MBDs were significantly lower in endometriotic lesions compared with eutopic endometrium of women with endometriosis and disease-free controls. Conclusion(s): These findings suggest a role for DNMTs and MBDs in the growth and differentiation of the human endometrium and support the notion that endometriosis may be an epigenetic disease. © 2011 American Society for Reproductive Medicine, Published by Elsevier Inc.

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Van Kaam, K. J. A. F., Delvoux, B., Romano, A., D’Hooghe, T., Dunselman, G. A. J., & Groothuis, P. G. (2011). Deoxyribonucleic acid methyltransferases and methyl-CpG-binding domain proteins in human endometrium and endometriosis. Fertility and Sterility, 95(4), 1421–1427. https://doi.org/10.1016/j.fertnstert.2011.01.031

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