Progesterone resistance in a baboon model of endometriosis

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Induced endometriosis in baboons reveals gradual progesterone resistance in the eutopic endometrium after six months, manifesting as reduced receptor responsiveness and epigenetic changes, mirroring human disease.

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The study developed and used an induced baboon model of endometriosis based on the retrograde menstruation hypothesis, then performed sequential analyses of the eutopic endometrium after disease establishment. It found that progesterone resistance emerges gradually over time, becoming evident after about 6 months, and is characterized by reduced responsiveness of the progesterone receptor and its chaperone immunophilins along with epigenetic modifications of progesterone-regulated genes. Comparative analyses indicated that the time-dependent changes in baboon eutopic endometrium are similar to alterations previously reported in women with endometriosis, with the caveat that the paper presents findings primarily in the eutopic compartment rather than detailing lesion-side mechanisms. This paper is centrally about endometriosis — it demonstrates time-dependent development of progesterone resistance in a baboon model and links eutopic endometrial dysregulation to endometriosis-associated infertility.

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Abstract

The development of a baboon model of induced endometriosis, which recapitulates the retrograde menstruation hypothesis, has greatly facilitated our understanding of the early events associated with the disease process. Sequential analysis of the eutopic endometrium following the establishment of disease suggests that the development of progesterone resistance is a gradual process and becomes evident after 6 months of disease induction. This resistance is manifested by a decreased responsiveness of the progesterone receptor and its chaperone immunophilins as well as epigenetic modifications of progesterone-regulated genes. In comparative studies, the time-dependent changes observed in the baboon eutopic endometrium are similar to those that have been reported to be altered in women with endometriosis. The baboon model therefore provides insight into the potential mechanisms by which genes in the eutopic endometrium are dysregulated and how this alteration results in infertility that is associated with endometriosis.
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Abstract

The development of a baboon model of induced endometriosis, which recapitulates the retrograde menstruation hypothesis, has greatly facilitated our understanding of the early events associated with the disease process. Sequential analysis of the eutopic endometrium following the establishment of disease suggests that the development of progesterone resistance is a gradual process and becomes evident after 6 months of disease induction. This resistance is manifested by a decreased responsiveness of the progesterone receptor and its chaperone immunophilins as well as epigenetic modifications of progesterone-regulated genes. In comparative studies, the time-dependent changes observed in the baboon eutopic endometrium are similar to those that have been reported to be altered in women with endometriosis. The baboon model therefore provides insight into the potential mechanisms by which genes in the eutopic endometrium are dysregulated and how this alteration results in infertility that is associated with endometriosis.

Keywords

Baboon - endometriosis - infertility - progesterone resistance

References

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Condition tags

endometriosisinfertility

MeSH descriptors

Disease Models, Animal Endometriosis Epigenesis, Genetic Papio Progesterone Animals Endometriosis Endometriosis Endometrium Endometrium Female Humans Immunophilins Immunophilins Infertility, Female Infertility, Female Infertility, Female Menstruation Disturbances Menstruation Disturbances Mice

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