一种卵巢胰岛素类特异地调节了营养受限的的能量分配和卵细胞发育
Yuan Luo1, Wen-Xin Hou1, Shan-Shan Zhao1
1Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology and Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, 510631, China.
BMC biology
|July 27, 2025
概括
在饥饿期间,昆虫通过优先考虑卵子发育来维持繁殖. 卵巢基因BgILP2激活胰岛素信号,以支持卵细胞生长,表明生殖和寿命之间的权衡.
科学领域:
- 昆虫的生殖生物学 昆虫的生殖生物学
- 分子内分泌学分子内分泌学
- 营养应激适应 营养应激适应
背景情况:
- 尽管有营养限制,但昆虫表现出了显著的繁殖弹性.
- 在有限的营养条件下,了解适应性生殖策略背后的机制至关重要.
- 德国 (Blattella germanica) 在食物有限的家庭环境中表现出高的繁殖能力.
研究的目的:
- 调查在受营养限制的情况下,控制昆虫的繁殖适应的分子机制.
- 为了确定关键的基因和途径,参与维持卵细胞在饥饿期间的发展.
- 阐明卵巢在对营养压力的反应中调节生殖策略中的作用.
主要方法:
- 卵巢切除术用于评估在营养受限条件下的卵巢功能.
- 转录组分析以确定差异表达的基因.
- 查RNA干扰 (RNAi) 以确定基因功能.
- 光在位杂交以定位基因表达.
- 对胰岛素信号通路组件 (p-AKT,p-ERK) 和青少年激素合成的分析.
主要成果:
- 一个卵巢丰富的类似胰岛素的基因BgILP2被发现,在营养不良的情况下显著上调.
- 抑制 BgILP2 损害了维特洛根因生物合成和青春期激素合成,延迟了卵细胞的发育.
- 胰岛素信号通路 (p-AKT,p-ERK) 的 BgILP2 激活在营养限制下对卵细胞发育至关重要.
- 在低营养条件下,BGILP2抑制导致能量代谢发生变化 (糖分升高,脂质/糖原减少),女性寿命略有增加.
结论:
- 卵巢基因BgILP2通过激活胰岛素信号通路来响应营养压力,以维持卵细胞的发育.
- BgILP2在能量分配中发挥作用,优先考虑生殖而不是体质维护,表明生殖和寿命之间的权衡.
- 这些发现揭示了新的分子机制和适应策略,使能够在食物有限的环境中保持繁殖成功.
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