ArticleInternational journal of molecular sciences2025
Calcium and Cadmium Activate ESRRB to Mediate Cell Stemness and Pluripotency.
Article in International journal of molecular sciences, 2025. 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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Abstract
Estrogen-related receptor beta (ESRRB) is thought to be an orphan receptor that functions as a transcription factor, pioneer factor, and mitotic bookmarker to regulate cell stemness, pluripotency, and differentiation. This study (1) investigates whether calcium and cadmium activation of ESRRB regulates signaling pathways of stemness and pluripotency, (2) explores the transcriptomic and biological alterations of metal activation of ESRRB, and (3) reveals the underlying mechanisms by which metals activate ESRRB. In HEK293T cells, treatment with calcium and cadmium increased the expression of ESRRB-regulated genes that was blocked by an ESRRB antagonist. In the breast cancer cell line MDA-MB-453, treatment with calcium, cadmium, or a synthetic agonist also increased the expression of ESRRB-regulated genes that was blocked by the antagonist, enhanced ESRRB nuclear localization, increased the recruitment of RNA polymerase 2 to estrogen-related receptor response elements (ERRE), enhanced cell stemness and proliferation pathways, and induced the expression of estrogen receptor alpha (ESR1 or Erα). Mutational analysis and molecular docking identified potential metal interaction sites within ESRRB's ligand-binding domain. Together, these results suggest calcium acts as a natural ligand for ESRRB and cadmium, which mimics calcium, activate ESRRB to mediate cell stemness and pluripotency.
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