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身体温度变化对大脑代谢物和功能连接在正常热量的小鼠的影响
概括
轻微的体温波动显著影响大脑新陈代谢,脑脊液 (CSF) 扩散性和功能连接性 (FC). 这些发现突出了大脑的功能.
科学领域:
- 神经科学是一个神经科学.
- 医疗成像医学成像
- 身体生理学 身体生理学
背景情况:
- 大脑的温度在生理范围 (34°C-39°C) 内受到严格调节.
- 可能会出现轻微的体温变化,受环境或生理状态的影响.
- 这些轻微的温度变化对健康大脑的代谢和功能后果尚不清楚.
研究的目的:
- 为了研究轻微的体温变化对大脑新陈代谢和小鼠功能的影响.
- 检查大脑温度的变化,大脑代谢物,脑脊液 (CSF) 扩散性和功能连接性 (FC).
- 评估对腹部海马体 (vHPC) 的影响 - 前垂体核 (AHN) 电路参与应激反应.
主要方法:
- 在小鼠中利用超高场磁共振成像 (MRI) 和磁共振光谱 (MRS).
- 在体内测量的大脑温度和大脑代谢物,直肠温度为35°C,37°C和39°C.
- 获得的扩散加权图像用于CSF扩散性和休息状态功能性MRI (rsfMRI) 用于FC分析.
主要成果:
- 观察到对大脑温度,海马体代谢物和CSF扩散度在测试温度的显著影响.
- rsfMRI揭示了功能连接的改变,特别是在vHPC-AHN电路内.
- FC的变化表明,体温轻微升高可能会影响与压力相关的神经通路.
结论:
- 大脑对在生理范围内的轻微体温波动表现出敏感性.
- 超高场MRI技术对于全面评估这些温度诱导的神经生物学变化是有价值的.
- 这些发现对解释人类和动物的神经成像研究有意义,因为体温可以变化.
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