Involvement of the WNT pathway in endometriosis
This study found that WNT pathway genes, especially LGR5, are upregulated in endometriosis lesions, promoting cell viability and migration, and that WNT inhibition reduces disease burden in a mouse model.
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This study investigated whether the WNT signaling pathway is dysregulated in endometriosis and contributes to pathologically relevant cellular behaviors. Using data from the prior EMMA endometriosis marker clinical study, TaqMan analyses of the same patient cohort showed upregulation of WNT2B, WNT7A, LGR5, RSPO1, and FZD7 in lesions, and mRNA manipulations implicated the pathway in altering viability, migration, and cell death/caspase activity in endometrial stromal cells, with increased LGR5 mRNA raising WNT activity and decreasing cell death while reduced mRNA produced opposite effects. In a retrograde menstruation mouse model, treatment with the WNT inhibitor LGK974 significantly reduced disease burden by lowering lesion size and number, and downregulated WNT genes associated with migration, proliferation, and vascularization. The authors note a key limitation that pharmacologically targeting WNT may have pleiotropic effects, limiting therapeutic specificity, though they propose that some pathway members, especially LGR5, could serve as biomarkers. This paper is centrally about endometriosis — it focuses on WNT pathway involvement and LGR5’s role in endometriosis lesion biology and disease burden.
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