在哺乳小鼠中,对母乳和养行为进行循环调节
Atsumi Murakami1, Haruo Masai1, Koyuki Kawamura1
1Department of Biological Sciences, Graduate School of Science, The University of Osaka, Toyonaka, Japan.
Journal of biological rhythms
|July 15, 2025
概括
母亲的护理行为,比如在幼上,是按昼夜时钟计时的,体温下降标志着夜间护理的开始. 哺乳期改变了养模式,显示了昼夜时钟.
科学领域:
- 时间生物学 时间生物学
- 母亲生理学 母亲生理学
- 神经内分泌学神经内分泌学
背景情况:
- 母亲的照顾对于后代的生存和发育至关重要.
- 昼夜节律调节各种生理和行为过程,包括食和活动模式.
- 哺乳期对母亲的代谢需求很大,可能会影响昼夜调节.
研究的目的:
- 研究哺乳期小鼠对孕产妇行为和养模式的昼夜调节.
- 检查哺乳期对上神核 (SCN) 中的时钟基因和肝脏中的代谢基因表达的影响.
- 了解母亲的生理时钟如何适应生殖的能量需求.
主要方法:
- 在哺乳小鼠中观察母和养行为.
- 监测与行为模式相关的体温波动.
- 用定量实时PCR分析SCN中的时钟基因表达和肝脏中的代谢基因表达.
主要成果:
- 母亲的行为主要发生在黑暗阶段的后半部分,前面是体温下降.
- 哺乳期的养行为增加,夜间和白天的养事件有着明显的模式.
- 虽然SCN时钟基因表达保持了强的节奏,但肝脏代谢基因表达显示出在哺乳期间与外周时钟控制分离的变化配置.
结论:
- 母亲的昼夜时钟在定时关键行为中发挥着至关重要的作用,例如在哺乳期间照顾幼犬和养.
- 哺乳诱导的代谢需求导致中央昼夜控制和外周代谢基因调节之间的分离.
- 这些适应确保关键的母体功能与物种生存的能量需求保持一致.
相关概念视频
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