昼夜时钟通过丝虫,Bombyx mori的酸通路影响饥饿抵抗力
Tai-Ming Dai1,2, Jian-Feng Qiu1,2, Cheng Luo1,2
1School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu Province, China.
Insect science
|May 21, 2024
概括
丝虫中日间钟基因BmPer的缺陷会损害饥饿抵抗力. 突变者表现出更高的代谢活性和抗氧化剂水平,这表明氧化还原平衡和能量负担之间存在联系.
科学领域:
- 生物化学 生物化学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 循环时钟的破坏会影响饥饿抵抗力,但潜在的机制仍然难以捉摸.
- 核心昼夜基因BmPer在调节代谢过程和应激反应方面发挥着作用.
研究的目的:
- 研究分子机制,将昼夜时钟的干扰与丝虫的饥饿抵抗的改变联系起来.
- 为了阐明BmPer缺乏的丝虫在饥饿中的代谢和遗传变化.
主要方法:
- 对BmPer缺乏 (Per-/-) 和野生类型丝虫的比较分析.
- 评估饥饿抵抗力,幼虫体重和代谢参数 (三糖,糖原,胆固醇).
- 转录组分析以确定基因表达变化,重点关注代谢途径和线粒体功能.
主要成果:
- 缺乏BmPer减少了饥饿抵抗力,随着幼虫年龄的增长,这种抵抗力得到了改善.
- 在正常情况下,突变幼虫的体重,甘油三和糖原积累增加.
- 在饥饿状态下,突变动物的体重消耗增加,胆固醇利用增加,β-氧化升级,线粒体基因表达改变.
- 在突变脂肪体中,还氧化平衡被破坏,抗氧化剂水平增加,酸通路被激活.
结论:
- 由于需要加强对氧化还原平衡的维护,BmPer 缺乏会增加丝虫的能量负担.
- 酸通路的激活对于在BmPer缺乏突变的代谢组织中提供降解功率至关重要.
- 这些发现突出了昼夜时钟功能,新陈代谢和应激弹性之间的复杂关系.
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