中性粒细胞停滞不前不会调解 fosforylation 的增加和与高盐饮食相关的认知障碍
bioRxiv : the preprint server for biology
|March 17, 2025
概括
饮食中大量摄入盐会损害大脑的血液流动,导致小鼠的毛细血管停滞. 然而,这种减少的流量并不能驱动与高盐饮食相关的认知衰退或tau变化.
科学领域:
- 神经科学是一个神经科学.
- 心血管科学 心血管科学
- 饮食科学 饮食科学
背景情况:
- 高食盐摄入量是中风和认知障碍的危险因素.
- 在小鼠中,高盐饮食 (HSD) 降低了脑血流 (CBF),增加了陶酸化,并损害了认知能力.
- 毛细血管停滞与其他疾病中减少CBF和认知问题有关.
研究的目的:
- 为了调查毛细血管停滞是否有助于减少CBF和认知障碍在HSD上的小鼠.
- 为了确定由于毛细血管停滞而导致的CBF减少是否是HSD诱导的 fosforylation和认知缺陷的主要原因.
主要方法:
- 在小鼠身上利用双光子成像观察大脑毛细血管.
- 评估了HSD对中性粒细胞毛细血管停滞和CBF的影响.
- 采用中性粒细胞枯竭来评估其对毛细血管停滞,CBF,陶酸化和认知功能的影响.
主要成果:
- HSD显著增加了脑毛细血管中中性粒细胞的停滞,导致CBF减少.
- 中性粒细胞枯竭成功地减少了毛细血管停滞,并恢复了休息的CBF.
- 尽管恢复了CBF,但中性粒细胞枯竭并没有防止陶酸化或认知障碍.
结论:
- 毛细血管停滞是导致HSD下CBF减少的一种机制.
- 由毛细血管停滞引起的降低CBF并不是HSD诱导的 fosforylation和认知障碍的主要驱动因素.
- 需要进一步的研究来确定将HSD与tau病理和认知功能障碍联系在一起的机制.
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