专门的肝细胞样细胞调节了多索菲拉脂代谢
Eugenio Gutierrez1, David Wiggins, Barbara Fielding
1Medical Research Council, National Institute for Medical Research, The Ridgeway, Mill Hill, London NW7 1AA, UK.
Nature
|December 1, 2006
概括
在Drosophila中,oenocytes在饥饿期间处理脂质,作用于脂肪体的下游. 这揭示了双向的脂质新陈代谢对于禁食和生长期间的能量至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 代谢调节 代谢调节 代谢调节 代谢调节
- 昆虫生理学 昆虫生理学
背景情况:
- 脂质代谢对于能量至关重要,特别是在饥饿期间.
- 在Drosophila幼虫中,在禁食期间从脂肪体中调动脂质并未完全理解.
- 在禁食昆虫中,脂质加工的确切作用和位置尚不清楚.
研究的目的:
- 为了确定主要的细胞类型,负责脂质滴在饥饿期间的积累在Drosophila.
- 阐明身体脂肪和其他组织在禁食期间的脂质处理中的功能关系.
- 为了研究细胞在调节脂肪代谢中的作用,无论是在食和禁食状态.
主要方法:
- 利用针对关键代谢基因的特定组织基因操纵 (Slimfast,Lsd2,Brummer脂酶).
- 在饥饿条件下观察到特定细胞类型的脂质滴积累.
- 分析了细胞功能对脂肪体脂存储的影响.
主要成果:
- 确定细胞是主要的细胞类型,在饥饿期间积累脂质滴.
- 证明细胞在脂质处理中在脂肪体下游发挥作用.
- 显示细胞对于在禁食期间耗尽脂肪体脂质储存至关重要,这表明双向合.
- 发现的细胞表达了许多脂质代谢蛋白,包括Cyp4g1,参与了三糖醇调节.
结论:
- 细胞在脂肪代谢和能量恒温中起着至关重要的作用,在禁食的Drosophila幼虫中起到关键作用.
- 脂肪体和脂肪细胞之间的脂质代谢合是双向的,对于饥饿期间的生存至关重要.
- 细胞在昆虫中的脂质处理中执行类似于哺乳动物肝脏的功能.
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