独立的胰岛素信号调节器在不同养状态下控制热避免
Meng-Hsuan Chiang1, Yu-Chun Lin1,2, Sheng-Fu Chen3
1Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan.
PLoS biology
|October 17, 2023
概括
饥饿的果比被养的果更能避开热量,因为它们有不同的胰岛素信号来调节大脑神经元活动. 这些发现揭示了基于营养状况的双重胰岛素路径控制热感应.
科学领域:
- 神经科学是一个神经科学.
- 动物行为 动物行为
- 内分泌学 在内分泌学.
背景情况:
- 热传感对于动物的生存至关重要.
- 营养状况如何影响热传感,尚未完全理解.
- 松虫 (Drosophila melanogaster) 作为研究这些机制的模型生物.
研究的目的:
- 研究营养状况调节Drosophila热感的机制.
- 为了确定神经回路和分子途径参与饥饿依赖的热回避行为.
主要方法:
- 行为测试测量受和饥饿的的避热行为.
- 成像用于监测体神经元 (MBns) 的活动.
- 基因操纵和信号通路分析 (PI3K/AKT,Ras/ERK) 以确定多索菲拉胰岛素类 (Dilps) 的作用.
主要成果:
- 饥饿的表现出明显更强烈的避热行为 (HAB),而不是的.
- 热刺激增加了α'β'体神经元 (MBns) 的活性,在饥饿状态下活动增加.
- 不同的多索菲拉胰岛素样 (Dilp2和Dilp6) 通过PI3K/AKT和Ras/ERK信号通路分别对MBn活动和HAB进行差异调节,这取决于养状态.
- 特定的MB输出神经元 (MBON) 对于处理这些集成信息至关重要.
结论:
- 营养状况极大地影响了Drosophila的热感和避开行为.
- 双重胰岛素信号通路 (Dilp2-PI3K/AKT用于腹,Dilp6-Ras/ERK用于饥饿) 调节控制温度调节的神经回路.
- 这些发现阐明了新陈代谢和适应性行为感官处理之间的复杂相互作用.
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