Browning of white adipose tissue: role of hypothalamic signaling.

Browning of white adipose tissue: role of hypothalamic signaling.
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DOI:
10.1111/nyas.12258
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发表时间:
2013-10
影响因子:
5.2
通讯作者:
Li L
Li L
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bi S;Li L

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包括成年人类在内的哺乳动物体内存在两种脂肪,白色脂肪组织(WAT)和棕色脂肪组织(BAT)。虽然Wat储存了过量的卡路里,脂肪的过度积累会导致肥胖,但BAT通过非颤抖的生热作用来消耗能量来产生热量,以抵御寒冷环境,并为开发新的抗肥胖治疗方法提供了潜力。下丘脑在能量平衡的控制中起着核心作用。具体地说,最近的观察表明,背内侧下丘脑(DMH)在体温调节中的重要性。我们发现DMH中的促食欲素神经肽Y(NPY)在调节肥胖和BAT产热方面具有明显的作用。在DMH中敲除NPY可提高经典BAT的生热活性,并促进WAT中棕色脂肪细胞的发育,导致生热增加。这些发现确定了与肥胖作斗争的一个新的潜在目标。
Two types of fat, white adipose tissue (WAT) and brown adipose tissue (BAT), exist in mammals including adult humans. While WAT stores excess calories and an excessive accumulation of fat causes obesity, BAT dissipates energy to produce heat through non-shivering thermogenesis for protection against cold environments and provides the potential for the development of novel anti-obesity treatments. The hypothalamus plays a central role in the control of energy balance. Specifically, recent observations indicate the importance of the dorsomedial hypothalamus (DMH) in thermoregulation. We have found that the orexigenic neuropeptide Y (NPY) in the DMH has distinct actions in modulating adiposity and BAT thermogenesis. Knockdown of NPY in the DMH elevates the thermogenic activity of classic BAT and promotes the development of brown adipocytes in WAT, leading to increased thermogenesis. These findings identify a novel potential target for combating obesity.
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