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营养敏感的PMv DAT神经元在青春期过渡期间受到动态调节
Cristina Sáenz de Miera1, Nicole Bellefontaine1, Marina A Silveira2,3
1Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109.
bioRxiv : the preprint server for biology
|February 20, 2025
概括
能量平衡影响青春期的发展. 腹前乳母细胞核 (PMv) 中的多巴胺输送器 (DAT) 神经元被确定为关键的素受体 (LepRb) 亚群,通过AVPV kisspeptin 神经元影响性成熟.
科学领域:
- 神经内分泌学神经内分泌学
- 生殖生物学 生殖生物学
- 代谢调节 代谢调节 代谢调节
背景情况:
- 青春期的发展与能量平衡和代谢状态密切相关.
- 在下丘脑中,特别是通过瘦素受体 (LepRb) 神经元传递瘦素信号,对于协调新陈代谢和生殖之间的相互作用至关重要.
- 腹前乳母细胞核 (PMv) 作为一个关键的继电器,用于叶素的生殖作用.
研究的目的:
- 在小鼠PMv.中识别和表征一种新型的白受体表达神经元子群.
- 研究这些神经元,特别是表达多巴胺转运体 (DAT) 的神经元在调节性成熟中的作用.
- 阐明PMvDAT神经元在莱普丁信号传递的背景下的神经解剖学连接和功能意义.
主要方法:
- 使用基因小鼠模型 (DATCRE;tdTomato,DATCRE;Kiss1hrGFP) 进行细胞特异性标记和分析.
- 进行了电生理学记录,以评估PMvDAT神经元的膜潜力.
- 在不同营养和荷尔蒙条件下的PMv中量化基因表达 (Slc6a3,Lepr)
- 采用病毒追踪技术来绘制来自PMvDAT神经元的投影.
主要成果:
- 确定了一种新型的PMv神经元子群,共同表达多巴胺转运体 (DAT) 和瘦素受体 (LepRb).
- PMvDAT神经元表达LeprmRNA并对瘦素做出反应,在青春期前与成年女性中具有不同的电生理学特性.
- 在PMv中的mRNA表达在发育上受到调节,并受到营养状况和瘦素水平的影响.
- PMvDAT神经元投射到前向中心周周和周周核 (AVPV/PeN),围绕着kisspeptin神经元,投射随着年龄的成熟而成熟.
- 这些预测还针对成年人中的氨酸氧酶神经元.
结论:
- 表达DAT的PMvLepRb亚群代表了一种新的神经回路,它参与了莱普对性成熟的调节.
- 这些神经元可能通过调节AVPV基斯佩丁/氨酸氧酶神经元的活动来影响生殖时间.
- 研究结果强调了代谢状态,多巴胺信号传递和青春期的神经内分泌控制之间的关键联系.
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