温度的缓慢下降会在哺乳动物冬眠时产生读透转录.
Masamitsu Sone1, Junpei Yamashita2, Shuji Shigenobu3
1Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan; Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan.
Biochemical and biophysical research communications
|March 31, 2024
概括
小型冬眠者在深度沉睡期间产生异常长的mRNA转录,称为读透转录 (RTT). 缓慢的体温下降,而不是快速的感冒或缺氧,会触发RTT的产生.
科学领域:
- 分子生物学分子生物学
- 生理学 生理学 生理学
- 生物化学 生物化学
背景情况:
- 细胞应激可以破坏mRNA处理,导致读透转录 (RTT).
- 进入深 (DT) 的小哺乳动物由于极端的生理变化而经历细胞应激.
- 在的过程中,RTT产生的特定触发因素在很大程度上是未知的.
研究的目的:
- 为了研究在深度的过程中诱导叙利亚仓鼠RTT的条件.
- 确定负责冬眠动物中RTT形成的特定细胞应激.
主要方法:
- 在深度和夏季条件下的叙利亚仓鼠肝脏组织中RTT的分析.
- 在体外实验中,使用暴露于不同温度变化和缺氧的原始仓鼠肝细胞进行了实验.
主要成果:
- 在深度的仓鼠中,从不同的基因位点检测到RTT.
- 缓慢下降的温度,模仿的入口,诱导RTTs在孤立的肝细胞.
- 快速冷处理,低氧或长时间冷 (4°C) 并没有显著增加RTT产量.
结论:
- 特定于深的RTT主要是由入阶段体温逐渐下降引起的.
- 这些发现阐明了一种新的机制,将冬眠期间的温度调节与mRNA处理异常联系起来.
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