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Neural stem cell activity at least partially accounts for the postweaning development of the sexually dimorphic nucleus of the preoptic area (SDN-POA) and estrogen selectively mobilizes neural stem cells in the 3 rd ventricle stem cell niche (3VSCN).Here, we examined the expression of estrogen receptor β (ERβ) in the SDN-POA and the 3VSCN.A subset of cells within the SDN-POA--delineated with or without calbindin D28K (CB28)immunoreactivity (ir)--exhibited ERβ-ir.The ependymal cells that expressed nestin within the 3VSCN also expressed ERβ. Interestingly, a few proliferating (Ki67 positive) cells within the 3VSCN and the hypothalamic parenchyma, including the SDN-POA, displayed ERβ-ir.In parallel, a subset of cells in the subventricular zone was double-labeled with nestin and ERβ or Ki67 and ERβ while the subgranular zone exhibited few such doublelabeled cells.ERβ is expressed in hypothalamic stem cells that may regulate cell regenerative cycles.
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He et al. (2017) studied this question.
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