Nature Medicine:利用一种肽,成功治疗肥胖症患者

2018-05-09 小通 生物通

“我们还想确定为什么这种肽如此有效,为什么与其它具有相似作用模式的制剂相比,这种肽没有产生任何严重的副作用?”


“我们还想确定为什么这种肽如此有效,为什么与其它具有相似作用模式的制剂相比,这种肽没有产生任何严重的副作用?”

在一项最新研究中,来自柏林Charité大学实验性儿科内分泌学研究所的研究人员成功治疗了由一种遗传缺陷导致的肥胖症患者。除了临床上的重要意义,研究人员还发现了这种治疗新药在调控饱腹感方面的信号通路基本机制。

这一研究成果公布在Nature Medicine杂志上。

很早以前科学家们就已经知道,我们的基因发生改变会提高肥胖的风险,比如一种编码瘦素受体(LEPR)的基因如果发生突变,就会引发出生后头几个月出现极度饥饿,结果导致个体在童年期间出现极度肥胖,即使增加运动量,减少热量摄入都不足以稳定体重。在这种情况下,一般来说肥胖手术也无法达到治疗效果,因此以药物为基础的治疗方法也就变得越来越重要。

两年前,Peter Kühnen博士等人证明,一种能激活黑素皮质素受体-4(melanocortin 4 receptor,MC4R)的肽在机体的能量代谢和体重调节中发挥核心作用。

MC4R是5种已发现的黑素皮质素受体家族成员之一,属于跨膜G-蛋白耦联受体超级家族。LEPR通常可以与瘦素(也称为饱腹感激素)结合,引发一系列导致促黑素细胞激素(MSH)生成的级联反应。MSH与其受体结合,MC4R就会诱导身体的饱腹感信号转导,发挥作用。但是,如果LEPR出现缺陷,信号级联会中断,患者的饥饿感仍然没有减弱,这会他们更容易肥胖。

在最新研究中,研究人员利用一种与大脑中MC4R结合的肽,激活正常的饱腹感信号。并且通过与柏林健康研究所(BIH)的临床研究单位合作,研究人员证实了这种方法能令有LEPR遗传缺陷的患者体重明显减轻。

“我们还想确定为什么这种肽如此有效,为什么与其它具有相似作用模式的制剂相比,这种肽没有产生任何严重的副作用,”Kühnen博士解释说。

“这项研究证明这种治疗方法能够激活特定的重要信号通路,其重要性以前被低估了。” Kühnen博士研究小组正在计划进行进一步的研究,希望能确定这种方法是否也适用与其他患者。“其他患有功能障碍的患者可能也是相同的信号通路受影响,可以作为这种治疗的合适候选人选。”

原始出处:

Karine Clément, et al.MC4R agonism promotes durable weight loss in patients with leptin receptor deficiency.Nature Medicine (2018 )doi:10.1038/s41591-018-0015-9

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    2018-09-23 liye789132251
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    2019-04-01 kalseyzl
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    2019-03-21 jeanqiuqiu
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    2018-05-10 kafei

    了解一下谢谢

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