Effect of a dienogest for an experimental three-dimensional endometrial culture model for endometriosis

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This study utilized a three-dimensional fibrin matrix culture model to demonstrate that endometrial explants form gland-like outgrowths ultrastructurally resembling ectopic implants, with dienogest dose-dependently inhibiting stromal cell outgrowth and glandular formation.

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The paper investigated whether a previously described three-dimensional fibrin matrix endometrial culture model can recapitulate early ectopic endometriosis-like ultrastructural features and whether the progestin dienogest alters endometrial outgrowth and apoptosis. Human endometrial explants were cultured in fibrin matrices and treated with dienogest or control conditions, with assessment by week 2 using ultrastructural characterization (electron microscopy) and measures of stromal outgrowth and gland formation. Endometrial gland-like outgrowths formed in a polarized, glandular epithelial-like manner, but dienogest impaired stromal outgrowth and glandular formation in a dose-dependent way; the authors note the model is an in vitro system aimed at understanding early lesion formation rather than capturing all aspects of disease. This paper is centrally about endometriosis — it tests dienogest effects in a three-dimensional endometrial culture model engineered to resemble ectopic endometriotic implants.

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Abstract

The pathogenesis of endometriosis remains poorly understood at least in part because early stages of the disease process are difficult to investigate. Previous studies have proposed a three-dimensional fibrin matrix culture model to study human endometriosis. We examined the ultrastructural features of the endometriosis in this model and assessed the effect of a progestin on endometrial outgrowth and apoptosis in this culture system. Endometrial explants were placed in three-dimensional fibrin matrix culture and treated with and without various concentrations of the progestin dienogest. By the second week, endometrial gland-like formation was established in outgrowths both attached to and at a distance from the explants. These cells formed a combination of clumps and tubular monolayers surrounding a central cavity. Electron microscopy demonstrated that these cells are polarized with microvilli on the apical surface, desmosome-like structures, and basement membrane; features consistent with glandular epithelial cells. Outgrowth of endometrial stromal cells and glandular formation was impaired in response to dienogest in a dose-dependent manner. Our study shows that the human endometrial explants cultured in three-dimensional fibrin matrix establish outgrowths that ultrastructurally resemble ectopic endometrial implants. This model may provide insight into the cellular processes leading to endometriosis formation and enables screening of therapeutic compounds.
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Abstract

The pathogenesis of endometriosis remains poorly understood at least in part because early stages of the disease process are difficult to investigate. Previous studies have proposed a three-dimensional fibrin matrix culture model to study human endometriosis. We examined the ultrastructural features of the endometriosis in this model and assessed the effect of a progestin on endometrial outgrowth and apoptosis in this culture system. Endometrial explants were placed in three-dimensional fibrin matrix culture and treated with and without various concentrations of the progestin dienogest. By the second week, endometrial gland-like formation was established in outgrowths both attached to and at a distance from the explants. These cells formed a combination of clumps and tubular monolayers surrounding a central cavity. Electron microscopy demonstrated that these cells are polarized with microvilli on the apical surface, desmosome-like structures, and basement membrane; features consistent with glandular epithelial cells. Outgrowth of endometrial stromal cells and glandular formation was impaired in response to dienogest in a dose-dependent manner. Our study shows that the human endometrial explants cultured in three-dimensional fibrin matrix establish outgrowths that ultrastructurally resemble ectopic endometrial implants. This model may provide insight into the cellular processes leading to endometriosis formation and enables screening of therapeutic compounds. Similar content being viewed by others

References

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Mol Hum Reprod 12:737–748 Acknowledgments T.K. received grant-in-aid from Scientific Research from the Ministry of Education, Science, and Culture, Japan (no. 23592412). J.J.B. was supported by the Biomedical Research Unit in Reproductive Health, a joint initiative between the University Hospitals Coventry and Warwickshire National Health Service Trust and Warwick Medical School. Author information Authors and Affiliations Corresponding author Rights and permissions About this article Cite this article Prechapanich, J., Kajihara, T., Fujita, K. et al. Effect of a dienogest for an experimental three-dimensional endometrial culture model for endometriosis. Med Mol Morphol 47, 189–195 (2014). https://doi.org/10.1007/s00795-013-0059-3 Received: Accepted: Published: Issue date: DOI: https://doi.org/10.1007/s00795-013-0059-3

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Condition tags

endometriosis

MeSH descriptors

Endometriosis Hormone Antagonists Nandrolone Adult Apoptosis Cell Culture Techniques Cell Proliferation Cells, Cultured Endometriosis Endometrium Endometrium Epithelial Cells Epithelial Cells Epithelial Cells Female Hormone Antagonists Humans Middle Aged Models, Biological Nandrolone

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