ArticlebioRxiv : the preprint server for biology2026
Estrogen is Coupled to the Calcium Release Machinery in Human Leiomyoma Cells.
Article in bioRxiv : the preprint server for biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
Uterine leiomyomas, commonly known as fibroids, are benign tumors of the female reproductive tract. They are the most common tumor of the female reproductive system and the leading cause of hysterectomy in the United States. Progesterone, estrogen, and their receptors are important drivers for the development and growth of leiomyomas. How estrogen drives leiomyoma growth remains unclear. We have previously shown that simvastatin can inhibit leiomyoma growth by modulating intracellular calcium. This suggests that calcium signaling is important for leiomyoma growth. We therefore hypothesized that estrogen may drive leiomyoma growth by stimulating calcium release through the membrane estrogen receptor GPR30 (also known as GPER). We found that estrogen dose-dependently induced calcium release in leiomyoma cells. The GPR30-specific agonist G-1 also induced calcium release, indicating that GPR30 mediates estrogen-mediated calcium release. The GPR30 antagonist G-15 blocked estrogen-induced calcium release and significantly reduced leiomyoma proliferation. Our results demonstrate that GPR30 is a major driver of estrogen-dependent growth in leiomyoma cells by modulating intracellular calcium. These findings may have high therapeutic relevance to leiomyomas and other estrogen-dependent tumors.
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