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Induction and Analysis of Epithelial to Mesenchymal Transition
Published on: August 27, 2013
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Correlation between Polycomb repressive complex proteins and epithelial-mesenchymal transition-associated genes in
Anushree Nandan1, Abhishek Mangeshikar2, Vaijayanti Kale1
1Symbiosis Centre for Stem Cell Research (SCSCR), Symbiosis International (Deemed University), Pune, Maharashtra, India.
Reproductive Biology
|December 20, 2025
Summary
Polycomb repressive complex 1 (PRC1) proteins, RING1B and BMI1, are upregulated in endometriosis tissue. This suggests PRC1 proteins may play a role in the development of endometriosis, a condition affecting women's reproductive health.
Area of Science:
- Reproductive biology
- Molecular oncology
- Epigenetics
Background:
- Endometriosis is a condition characterized by endometrial tissue outside the uterus, causing pain and infertility.
- Current treatments offer symptomatic relief, but the exact cause of endometriosis remains unknown.
- Epithelial-mesenchymal transition (EMT) is implicated in endometriosis, but its triggers are unclear. Polycomb group (PcG) proteins regulate gene expression and are linked to cancers.
Purpose of the Study:
- To investigate the potential role of Polycomb group (PcG) proteins in endometriosis pathogenesis.
- To compare the expression of PcG proteins and EMT-associated genes in ectopic endometriotic tissue versus eutopic endometrial tissue from the same patients.
Main Methods:
- Gene expression of Polycomb repressive complex 1 (PRC1) components (RING1B, BMI1) and EMT markers (TWIST, SNAI1, SNAI2, ZEB1, CDH1, CDH2, VIM) was quantified.
- Paired eutopic and ectopic tissue samples from 12 women with laparoscopically confirmed endometriosis were analyzed.
- Expression levels were compared between endometriotic lesions and matched endometrial tissue.
Main Results:
- Endometriotic tissues exhibited significantly higher gene expression of PRC1 proteins, specifically RING1B and BMI1, compared to eutopic endometrial tissues.
- Elevated expression of EMT-associated genes was also observed in the endometriotic lesions.
- These findings indicate a correlation between PcG protein dysregulation and EMT markers in endometriosis.
Conclusions:
- The study suggests that Polycomb repressive complex 1 (PRC1) proteins, including RING1B and BMI1, may be involved in the pathogenesis of endometriosis.
- Upregulation of PRC1 and EMT genes in ectopic tissue points to a potential epigenetic mechanism driving endometriosis development.
- Further research into PcG protein function could reveal novel therapeutic targets for endometriosis.
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