棕色脂肪代谢的新变化
Harriet Wallberg-Henriksson1, Juleen R Zierath
1Department of Molecular Medicine and Surgery, Section of Integrative Physiology, Karolinska Institutet, S-171 77 Stockholm, Sweden.
Cell
|April 7, 2009
概括
转录因子twist-1负面调节PGC-1alpha,这是线粒体生物生成和棕色脂肪中的热生成的关键驱动因素. 这一发现揭示了控制能源支出的反机制.
科学领域:
- 代谢和内分泌学
- 分子生物学分子生物学
- 脂肪组织生物学 脂肪组织生物学
背景情况:
- 氧酶增殖器激活受体马协作激活剂1-α (PGC-1alpha) 对于棕色脂肪组织中的线粒体生物发生和热发生至关重要.
- 了解PGC-1α的调节对于控制能量消耗和代谢平衡至关重要.
研究的目的:
- 在棕色脂肪组织中识别PGC-1alpha的新型调节剂.
- 阐明控制PGC-1α活性的分子机制.
主要方法:
- 研究了转录因子在调节PGC-1alpha中的作用.
- 利用分子生物学技术来评估基因表达和蛋白质相互作用.
主要成果:
- 确定了twist-1作为一种转录因子,直接与PGC-1alpha相互作用并抑制它.
- 证明twist-1作为PGC-1α介导基因表达的负反调节剂.
- 展示了twist-1对线粒体生物发生和发热基因程序的影响.
结论:
- Twist-1 是棕色脂肪组织中PGC-1alpha的新型负调节剂.
- 这个调节轴为调节线粒体功能和能量代谢提供了一个新的目标.
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