通过太空飞行来应对肌肉和骨损失:GSK3作为潜在的目标目标
Ryan W Baranowski1,2, Jessica L Braun1,2, Briana L Hockey1,2
1Department of Kinesiology, Brock University, St. Catharines, ON, Canada.
iScience
|June 26, 2023
概括
太空飞行改变了小鼠中的糖原合成酶激酶3 (GSK3). 抑制GSK3有望保持肌肉质量和力量,并在太空任务期间增加骨密度.
科学领域:
- 太空飞行和运动生理学
- 分子生物学分子生物学
- 骨生物学 骨生物学
背景情况:
- 太空飞行引发显著的肌肉和骨损失.
- 糖原合成酶激酶3 (GSK3) 与肌肉和骨代谢相关的细胞信号通路有关.
- 了解GSK3的作用对于开发针对太空飞行诱导的缩的对策至关重要.
研究的目的:
- 为了研究太空飞行对GSK3含量和酸化在小鼠肌肉和骨的影响.
- 为了确定调节GSK3活动是否可以减轻太空飞行引起的骨肌肉和骨缺陷.
主要方法:
- 在四次任务中对接受太空飞行的小鼠进行肌肉和骨样本的分析.
- 测量GSK3β含量和血清酸化.
- 在小鼠中以地球为基础的后肢卸载模型,具有肌肉特定的Gsk3敲击或删除.
主要成果:
- 太空飞行降低了GSK3β含量,与IIA型肌肉纤维的损失相关.
- 在特定的太空飞行任务中观察到高的GSK3血清酸化.
- 肌肉特定的Gsk3抑制/删除保留了肌肉质量,强度,并促进了氧化纤维类型.
- 在太空飞行后的骨中,GSK3的激活得到了增强,并且在卸载过程中,GSK3的删除增加了骨矿物密度.
结论:
- 太空飞行显著改变了GSK3在骨肌肉和骨中的信号传递.
- 准GSK3是一个潜在的治疗策略,可以在太空飞行期间抵消肌肉缩和骨损失.
- 进一步研究GSK3抑制作为太空飞行对策是有必要的.
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