副腹腔下丘脑中的多巴胺能神经元延长了食物消费阶段
Winda Ariyani1, Chiharu Yoshikawa1, Haruka Tsuneoka1
1Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Gunma 371-8512, Japan.
概括
在下丘脑 (PVH) 的副腹腔核中的多巴胺能神经元驱动食物消费和肥胖. 这些神经元与表观遗传变化有关,对于延长食时间和促进体重增加至关重要.
科学领域:
- 神经科学是一个神经科学.
- 内分泌学 在内分泌学.
- 肥胖问题研究研究
背景情况:
- 养行为涉及不同的神经回路,用于采购,消费和终止.
- 控制食物消费阶段的神经机制尚未完全理解.
研究的目的:
- 为了研究多巴胺能神经元在下丘脑 (PVH) 的副腹腔核中的作用,调节养行为.
- 探索PVH多巴胺基神经元,表观遗传机制和肥胖发展之间的联系.
主要方法:
- 利用小鼠模型研究养行为和神经回路.
- 研究了PVH中多巴胺能神经元的功能.
- 研究了与普罗皮欧梅拉诺科丁 (POMC) 神经元和侧面大脑 (LHb) 的相互作用.
- 评估了氨酸氧酶 (TH) 表达及其与肥胖和DNA甲基转移酶3A (Dnmt3a) 缺乏症的关系.
主要成果:
- PVH多巴氨基神经元对于延长食物消费阶段至关重要.
- 这些神经元与POMC神经元同步,并由POMC信号激活.
- 在LHb中的多巴胺受体D2调解了增加的食物消耗.
- 在PVH中升高的TH表达与肥胖相关,并且对于在缺乏Dnmt3a的小鼠中诱导肥胖是必要的.
结论:
- PVH多巴胺基神经元在促进食物消费方面发挥着至关重要的作用.
- 这些神经元通过表观遗传调节参与肥胖的发展,特别是涉及TH表达和Dnmt3a.
- 这些发现突出了一个新的途径,将下丘脑多巴胺信号与食行为和代谢疾病联系起来.
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