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- W2024658716 abstract "The GnRH gene is expressed exclusively in a highly restricted population of approximately 800 neurons in the mediobasal hypothalamus in the mouse. The Otx2 homeoprotein has been shown to colocalize with GnRH in embryonic mouse brain. We have identified a highly conserved bicoid-related Otx target sequence within the proximal promoter region of the GnRH gene from several species. This element from the rat GnRH promoter binds baculovirus-expressed Otx2 protein and Otx2 protein in nuclear extracts of a hypothalamic GnRH-expressing neuronal cell line, GT1–7. Transient transfection assays indicate that the GnRH promoter Otx/bicoid site is required for specific expression of the GnRH gene in GT1–7 cells and that it can confer specificity to a neutral Rous sarcoma virus (RSV) promoter in GT1–7 cells but not in NIH3T3 cells. Overexpression of mouse Otx2 in GT1–7 cells induces expression of a GnRH promoter plasmid, an effect that is dependent upon the Otx binding site. Thus, the GnRH proximal promoter is regulated by the Otx2 homeoprotein. Finally, we have now demonstrated the presence of Otx2 protein in the GnRH neurons of the adult mouse hypothalamus. These data suggest that Otx2 is important in the development of the GnRH neuron and/or in the maintenance of GnRH expression in the adult mouse hypothalamus." @default.
- W2024658716 created "2016-06-24" @default.
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- W2024658716 date "2000-08-01" @default.
- W2024658716 modified "2023-10-17" @default.
- W2024658716 title "The Otx2 Homeoprotein Regulates Expression from the Gonadotropin-Releasing Hormone Proximal Promoter" @default.
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- W2024658716 doi "https://doi.org/10.1210/mend.14.8.0509" @default.
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