功能性基因组屏幕揭示了参与脂滴形成和利用的基因
Yi Guo1, Tobias C Walther, Meghana Rao
1Department of Biochemistry and Biophysics, University of California, San Francisco, California 94158, USA.
Nature
|April 15, 2008
概括
研究人员确定了关键基因,调节了真核细胞中脂质滴滴的形成. 这一发现揭示了细胞储能及其在肥胖和糖尿病等代谢疾病中的作用.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 细胞储存中性脂质在细胞质脂质滴中,这对于能量储存和膜脂质合成至关重要.
- 过度的脂质积累与肥胖,糖尿病和动脉样硬化有关,但对脂质滴滴细胞生物学的了解很少.
研究的目的:
- 使用全基因组屏幕识别参与脂质滴形成和调节的基因.
- 了解控制脂质滴形态和脂质利用的细胞机制.
主要方法:
- 在Drosophila S2细胞中进行全基因组RNA干扰 (RNAi) 选.
- 基因对脂质液滴的淘汰效应的表型分类.
- 在脂生物合成和囊泡运输中分析基因功能.
主要成果:
- 发现大约1.5%的基因在脂质滴形成和调节中起作用.
- 参与脂生物合成的基因显著影响了脂滴的大小和数量.
- 已确定Arf1-COPI囊泡运输蛋白调节脂质滴形态和脂质利用.
结论:
- 脂滴单层的脂成分是滴滴形态和脂质利用的关键决定因素.
- 膀运输机械在脂质滴滴调节方面具有以前未知的作用.
- 这些在Drosophila的发现被保存在哺乳动物细胞中,为人类代谢疾病提供了洞察力.
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