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Expression of Stromal Progesterone Receptor and Differential Methylation Patterns in the Endometrium May Correlate with Response to Progesterone Therapy in Endometrial Complex Atypical Hyperplasia.

Authors
  • Neal, Adam S1, 2
  • Nunez, Miguel3
  • Lai, Tiffany1, 2
  • Tosevska, Anela4
  • Morselli, Marco5, 6
  • Amneus, Malaika7
  • Zakhour, Mae1
  • Moatamed, Neda A8
  • Pellegrini, Matteo2, 4, 6
  • Memarzadeh, Sanaz9, 10, 11, 12
  • 1 Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, 90095, USA.
  • 2 UCLA Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California Los Angeles, Los Angeles, CA, 90095, USA.
  • 3 University of California San Fransisco School of Medicine, 516 Parnassus Avenue, San Fransisco, CA, 94143, USA.
  • 4 Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, CA, 90095, USA.
  • 5 Institute for Genomics and Proteomics, University of California Los Angeles, Los Angeles, CA, 90095, USA.
  • 6 Institute for Quantitative and Computational Biology-The Collaboratory, University of California Los Angeles, Los Angeles, CA, 90095, USA.
  • 7 Department of Obstetrics and Gynecology, Southern California Permanente Medical Group, Panorama City, CA, 91402, USA.
  • 8 Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, 90095, USA.
  • 9 Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, 90095, USA. [email protected]
  • 10 UCLA Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California Los Angeles, Los Angeles, CA, 90095, USA. [email protected]
  • 11 Molecular Biology Institute, University of California Los Angeles, Los Angeles, CA, 90095, USA. [email protected]
  • 12 The VA Greater Los Angeles Healthcare System, Los Angeles, CA, 90073, USA. [email protected]
Type
Published Article
Journal
Reproductive Sciences
Publisher
SAGE Publications
Publication Date
Sep 01, 2020
Volume
27
Issue
9
Pages
1778–1790
Identifiers
DOI: 10.1007/s43032-020-00175-w
PMID: 32124398
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Progesterone therapy is a viable treatment for complex atypical hyperplasia (CAH) and endometrial adenocarcinoma, though reliable molecular determinants of response are not available. To explore if analysis of pre-therapy endometrial biopsies could yield biomarkers of response to progesterone, patients with CAH or adenocarcinoma undergoing treatment with progestins were included in this cross-sectional study. Immunohistochemistry for progesterone receptor (PR) was performed. Manual PR expression scores (PRES) were first calculated for biopsies by counting PR-positive nuclei in 12 sensitive vs 9 resistant samples. Significant differences in manual PRES were detected in the stroma (p < 0.01) and total endometrium (p < 0.01) for sensitive vs resistant patients. Manual PRES in the stroma had the highest accuracy in segregating sensitive vs resistant patients (96%). Differences in epithelial PRES were not significant. To validate these findings, a correlation between manual PRES and visual PRES was performed in the 21 patients. An additional 11 patients were analyzed to test if visual PRES would be predictive of response to progesterone. Visual PRES in epithelia and stroma in the 32 specimens was calculated. Significant differences in visual PRES were detected in the stroma for sensitive vs resistant samples (p < 0.01), while differences in epithelial and total endometrium were not significant. Whole genome bisulfite sequencing was performed on DNA isolated using pre-therapy biopsies from 6 sensitive and 6 resistant patients in this cohort. Differentially methylated regions were identified in the stroma and epithelium when evaluating sensitive vs resistant samples. Pathways involved in cell adhesion demonstrated the greatest difference in methylation in these samples.

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