Mediobasal hypothalamic p70 S6 kinase 1 modulates the control of energy homeostasis.

Mediobasal hypothalamic p70 S6 kinase 1 modulates the control of energy homeostasis.
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DOI:
10.1016/j.cmet.2008.10.004
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发表时间:
2008-12
期刊:
影响因子:
29
通讯作者:
Schwartz, Gary J.
Schwartz, Gary J.
中科院分区:
生物学1区
文献类型:
--
作者:
Blouet, Clemence;Ono, Hiraku;Schwartz, Gary J.

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p70 S6激酶1 (S6K)是哺乳动物雷帕霉素靶蛋白(mTOR)的主要下游效应物,主要涉及蛋白质合成、细胞生长和增殖的控制。本研究表明,大鼠中基底下丘脑(MBH) S6K活性的特异性双向分子靶向足以显著改变食物摄取量、体重、下丘脑产氧神经肽表达、下丘脑瘦素敏感性以及对快速代谢和摄食的反应。此外,腺病毒介导的MBH S6K组成性激活提高了小鼠的耐寒性,并防止高脂肪饮食引起的暴饮暴食、脂肪沉积和胰岛素抵抗。我们的研究结果为MBH S6K活性双向驱动能量平衡的行为和代谢决定因素提供了直接证据,并促进了其作为代谢性疾病治疗靶点的评估。
p70 S6 kinase 1 (S6K) is a major downstream effector of the mammalian target of rapamycin (mTOR), primarily implicated in the control of protein synthesis, cell growth and proliferation. Here we demonstrate that specific bidirectional molecular targeting of mediobasal hypothalamic (MBH) S6K activity in rats is sufficient to significantly alter food intake, body weight, hypothalamic orexigenic neuropeptide expression, hypothalamic leptin sensitivity and the metabolic and feeding responses to a fast. In addition, adenoviral-mediated constitutive activation of MBH S6K improved cold tolerance and protected against high-fat diet induced overeating, fat deposition and insulin resistance. Our results provide direct evidence that MBH S6K activity bidirectionally drives behavioral and metabolic determinants of energy balance, and promote its assessment as a therapeutic target in metabolic diseases.
DOI: 10.1152/ajpregu.1991.260.2.r321
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