中介细胞干细胞激发心肌NAD+代谢,以缓解微重力诱导的心脏功能障碍
Chuanjie Zhang1, Yanhong Yuan2, Shuhui Zhang3
1State Key Laboratory of Space Medicine, China Astronaut Research and Training Center, Beijing, 100000, China; The Third Affiliated Hospital of Jinzhou Medical University, Jinzhou City, Liaoning, 121000, China.
Biochemical and biophysical research communications
|September 10, 2024
概括
太空旅行会导致心脏衰老和功能障碍. 脂质衍生性介质干细胞 (ADSC) 和尼古丁胺胺单核酸 (NMN) 在通过恢复NAD+水平来预防和治疗这些微重力诱导的心脏问题方面表现有前途.
科学领域:
- 心血管生物学心血管生物学
- 太空医学 太空医学
- 衰老的研究研究.
背景情况:
- 长时间的太空操作会导致左心室肌动脉的不适应性缩,导致心脏功能障碍.
- 微重力引起的心脏功能障碍的确切机制尚不清楚,需要研究预防和治疗策略.
研究的目的:
- 研究模拟微重力对心脏衰老和功能的影响.
- 探索脂肪衍生性介质干细胞 (ADSC) 和尼古丁胺胺 mononucleotide (NMN) 作为微重力诱导的心脏功能障碍的治疗干预的潜力.
主要方法:
- 一个尾部悬挂 (TS) 模型被用来模拟小鼠的微重力条件.
- 静脉注射ADSC和口服NMN被用作治疗策略.
- 进行了血代谢分析,以评估代谢变化,特别是NAD+水平.
主要成果:
- 长期暴露于模拟的微重力加速了心脏衰老,并导致小鼠的心脏功能障碍.
- 治疗ADSC证明了预防和治疗作用,对心肌衰老和功能衰退.
- 代谢分析显示,在TS小鼠中,NAD+的显著损失被ADSC治疗恢复,这表明ADSC疗效的作用.
- NMN的使用复制了ADSCs的治疗效益,强调了NAD+代谢的重要性.
结论:
- 模拟微重力促进心脏衰老和功能障碍,与降低的NAD+水平有关.
- ADSCs为缓解微重力诱导的心脏重塑和功能障碍提供了一个有希望的治疗方法.
- 针对NAD+代谢,可能通过NMN补充剂,为预防和治疗与太空飞行相关的心脏问题提供了可行的策略.
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