在Aedes aegypti寒冷适应过程中对新型和已知的miRNA进行热分析
Ella H M De Nicola1, Kyle K Biggar2, Heath A MacMillan2
1Department of Biology, Carleton University, Ottawa, Ontario, Canada.
概括
像埃及蚊子 (Aedes aegypti) 这样的蚊子通过适应性增强了寒冷的生存能力,这种特征可能是由新型的微RNA (miRNA) 驱动的. 这些小RNA调节基因表达,影响蚊子的热可塑性和范围扩展.
科学领域:
- 分子生物学
- 昆虫学
- 遗传学
背景情况:
- 一种疾病载体的埃及虫在适应寒冷后表现出更强的生存能力,这可能解释了它的扩展范围.
- 这种热可塑性的分子支柱在AE. 埃及人还不太了解.
- 微RNAs (miRNAs) 是已知的基因表达和热适应的调节者.
研究的目的:
- 在Ae中识别新的miRNA. 埃及人.
- 调查miRNAs在Ae冷适应中的作用. 埃及人.
- 探索冷影响的miRNA目标及其在低温生存中的功能.
主要方法:
- 生物信息分析以识别新的miRNA.
- 成年雌性Ae的冷 (15°C) 和温暖 (25°C) 适应. 埃及人.
- 用RT-qPCR对选定的miRNA进行差异表达分析.
- 考虑到温度依赖的热力学,预测miRNA目标.
主要成果:
- 两种新的miRNAs (aae- miR- novel2, aae- miR- novel3) 在适应寒冷的蚊子中得到了上调.
- 参与脂质代谢和繁殖的两个已知的miRNAs (aae- miR- 8-3p,aae- miR- 13b- 3p) 的下调.
- 预测冷影响的miRNA标与离子稳定,膜稳定和其他低温生存过程有关.
结论:
- 微RNA在蚊子的热可塑性中起着重要的调节作用.
- 发现的新型miRNA可能有助于Ae. 埃及人适应寒冷的能力.
- 对蚊子在热适应中的miRNA功能进行进一步研究是有必要的.
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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...


