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Sökning: WFRF:(Indukuri Rajitha) > (2023)

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1.
  • Birgersson, Madeleine, et al. (författare)
  • ERβ in Granulosa Cell Tumors and Its Clinical Potential
  • 2023
  • Ingår i: Endocrinology. - : The Endocrine Society. - 0013-7227 .- 1945-7170. ; 164:6
  • Forskningsöversikt (refereegranskat)abstract
    • Granulosa cell tumors (GCTs) are rare ovarian tumors comprising an adult and a juvenile subtype. They have a generally good prognosis, but the survival rate drastically declines in patients with late-stage or recurring tumors. Due to the rarity of GCTs, the tumor type is largely understudied and lacks a specific treatment strategy. Estrogen receptor beta (ERβ/ESR2) has been found to be highly expressed in GCTs, which could be of therapeutic importance since it can be targeted with small molecules. However, its role in GCTs is not known. In this review, we summarize the current knowledge about the action of ERβ in the ovary and discuss its prospective role in GCTs.
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2.
  • Birgersson, Madeleine, et al. (författare)
  • Ovarian ERβ cistrome and transcriptome reveal chromatin interaction with LRH-1
  • 2023
  • Ingår i: BMC Biology. - : Springer Nature. - 1741-7007. ; 21:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Estrogen receptor beta (ERβ, Esr2) plays a pivotal role in folliculogenesis and ovulation, yet its exact mechanism of action is mainly uncharacterized.Results: We here performed ERβ ChIP-sequencing of mouse ovaries followed by complementary RNA-sequencing of wild-type and ERβ knockout ovaries. By integrating the ERβ cistrome and transcriptome, we identified its direct target genes and enriched biological functions in the ovary. This demonstrated its strong impact on genes regulating organism development, cell migration, lipid metabolism, response to hypoxia, and response to estrogen. Cell-type deconvolution analysis of the bulk RNA-seq data revealed a decrease in luteal cells and an increased proportion of theca cells and a specific type of cumulus cells upon ERβ loss. Moreover, we identified a significant overlap with the gene regulatory network of liver receptor homolog 1 (LRH-1, Nr5a2) and showed that ERβ and LRH-1 extensively bound to the same chromatin locations in granulosa cells. Using ChIP-reChIP, we corroborated simultaneous ERβ and LRH-1 co-binding at the ERβ-repressed gene Greb1 but not at the ERβ-upregulated genes Cyp11a1 and Fkbp5. Transactivation assay experimentation further showed that ERβ and LRH-1 can inhibit their respective transcriptional activity at classical response elements.Conclusions: By characterizing the genome-wide endogenous ERβ chromatin binding, gene regulations, and extensive crosstalk between ERβ and LRH-1, along with experimental corroborations, our data offer genome-wide mechanistic underpinnings of ovarian physiology and fertility.
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