合成甘-1的转基因表达揭示了由合成甘-3对养行为的生理控制
1Division of Newborn Medicine, Department of Pediatrics and Cell Biology, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA. oreizes@go.com
Cell
|July 20, 2001
概括
在下丘脑中的syndecan-1和syndecan-3会影响食行为和肥胖. 振荡的syndecan-3水平在生理上调节养,影响能量平衡.
科学领域:
- 神经内分泌学神经内分泌学
- 代谢调节 代谢调节 代谢调节
- 细胞生物学 细胞生物学
背景情况:
- 合成剂,细胞表面的硫甲蛋白糖,调节连接体-受体相互作用.
- 减少阿尔法黑色素激素刺激激素 (alphaMSH) 的作用与过和肥胖有关.
- 合成甘-1和合成甘-3在新陈代谢调节中起作用.
研究的目的:
- 为了调查sydecan-1和sydecan-3在下丘脑养调节中的作用.
- 为了确定Syndecan表达对能量平衡和肥胖的生理影响.
- 探索辛德卡因调节养行为的机制.
主要方法:
- 转基因小鼠模型在下丘脑表达syndecan-1.
- 产生和分析的syndecan-3无基因小鼠.
- 评估养行为 (食过度) 和体重变化,以应对遗传修饰和食物剥夺.
主要成果:
- 转基因syndecan-1表达诱导过和肥胖,模仿降低的alphaMSH信号传递.
- 在野生类型小鼠的食物剥夺后,下丘脑中syndecan-3水平显著增加.
- Syndecan-3无菌小鼠表现出对食物剥夺的模糊过反应.
结论:
- 脑下垂体中的syndecan-1和syndecan-3是养行为和能量恒温的关键调节者.
- 辛德肯-3的水平在生理上波动,以调节食反应,特别是在禁食期间.
- 这些发现表明syndecans是肥胖干预的潜在目标.
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