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- W2003487966 abstract "GnRH, the central regulator of reproductive function, is produced by only approximately 800 highly specialized hypothalamic neurons. Previous studies identified a minimal promoter [GnRH minimal promoter (GnRH-P)] (-173/+1) and a neuron-specific enhancer [GnRH-enhancer (E)1] (-1863/-1571) as regulatory regions in the rat gene that confer this stringent specificity of GnRH expression to differentiated GnRH neurons. In transgenic mice, these two elements target only GnRH neurons but fail to drive expression in the entire population, suggesting the existence of additional regulatory regions. Here, we define two novel, highly conserved, upstream enhancers in the GnRH gene termed GnRH-E2 (-3135/-2631) and GnRH-E3 (-4199/-3895) that increase neuron-specific GnRH expression through interactions with GnRH-E1 and GnRH-P. GnRH-E2 and GnRH-E3 regulate GnRH expression through similar mechanisms via Oct-1, Msx1, and Dlx2, which bind both GnRH-E2 and the GnRH-E3 critical region at -3952/-3895. Overexpression of Dlx2 increases transcription through GnRH-E2 and GnRH-E3. Remarkably, these novel elements are contained within the 3' untranslated region of the neighboring upstream gene, yet are marked endogenously by histone modification signatures consistent with those of enhancers. Thus, GnRH-E2 and GnRH-E3 are novel regulatory elements that, together with GnRH-E1 and GnRH-P, confer the specificity of GnRH expression to differentiated and mature GnRH neurons." @default.
- W2003487966 created "2016-06-24" @default.
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- W2003487966 date "2010-10-01" @default.
- W2003487966 modified "2023-09-23" @default.
- W2003487966 title "Enhancers of GnRH Transcription Embedded in an Upstream Gene Use Homeodomain Proteins to Specify Hypothalamic Expression" @default.
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- W2003487966 doi "https://doi.org/10.1210/me.2010-0156" @default.
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