Cell Rep:肝素上调食欲,促进体重增长,有望在食欲失调治疗方面发挥作用

2017-09-15 佚名 生物探索

肝素(Heparin)是一种被广泛用于防止血液凝结的药物,因最初在肝脏中发现而得名。9月5日,《Cell Reports》期刊最新发表文章揭示了肝素的一个全新功能——促进食欲、增加体重。来自于贝勒医学院和华南农业大学的科学家们以动物为模型证实,肝素有望成为调控食欲和体重药物的潜在靶标。


从左往右依次为:华南农业大学的Canjun Zhu、Gang Shu教授 ,贝勒医学院的Yanlin He博士、Pingwen Xu博士和Yong Xu教授(图片来源:华南农业大学、贝勒医学院)

肝素(Heparin)是一种被广泛用于防止血液凝结的药物,因最初在肝脏中发现而得名。9月5日,《Cell Reports》期刊最新发表文章揭示了肝素的一个全新功能——促进食欲、增加体重。来自于贝勒医学院和华南农业大学的科学家们以动物为模型证实,肝素有望成为调控食欲和体重药物的潜在靶标。

贝勒医学院分子和细胞生物学、儿科系副教授徐勇(Yong Xu)和华南农业大学动物科学学院教授Gang Shu是第一批研究肝素调节人体能量平衡功能的团队之一。他们在之前的研究中发现,饥饿期间,小鼠的血清肝素水平显著增加。

肝素如何调控食欲?

借助于电生理学、药理学、分子生物学和化学遗传学等方法,研究团队发现,肝素会刺激位于下丘脑的AgRP神经元(调节食欲的最重要神经元之一),上调AgRP蛋白(一种促进食欲的神经肽)的表达。肝素还负责促进AgRP神经元释放神经递质。他们认为,这些效应能够增加小鼠对食物的摄取量。

有意思的是,他们发现,肝素和胰岛素之间存在竞争关系——通过与胰岛素竞争和胰岛素受体的结合,肝素负责激活AgRP神经细胞。

“胰岛素和肝素对于AgRP神经元的作用截然相反。胰岛素负责抑制AgRP神经元以及AgRP神经肽的表达。我们发现,肝素会与胰岛素竞争,阻止它与AgRP神经元上的胰岛素受体结合。”研究人员解释道。

肝素在临床上主要用于抗凝血和抗血栓,现在这一研究有望提高我们对其新功能的重视,肝素有望在治疗食欲失调中发挥作用。

原始出处:

Canjun Zhu, Pingwen Xu, Yanlin He, et.al. Heparin Increases Food Intake through AgRP Neurons. Cell Reports, 2017.

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    2018-01-23 维他命
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    2017-12-07 wangvase

    是厌食症者的福利

    0

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    2017-09-17 1e10c84am36(暂无匿称)

    文章很好.赞赞赞

    0

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抗凝治疗是经导管主动脉瓣置换术(TAVR)的必需程序。虽然一个最佳方案尚未确定,但主要用肝素。直接凝血酶抑制比伐卢定可能是在此过程中用于抗血凝剂一种有效的替代肝素药物。 本研究的目的是确定是否比伐卢定可以替代肝素作为接受TAVR的患者的抗凝血剂。共有802例主动脉瓣狭窄患者被随机分配接受经股TAVR比伐卢定 vs 肝素。2个主要终点是48小时内或出院前严重出血事件(以先发生为准)和30天

BMJ:比伐卢定 vs 肝素治疗急性冠状动脉综合征患者,哪一个更好?

来自意大利的研究人员开展了一项随机对照研究,该研究的目的是测试急性冠状动脉综合征患者最佳的抗血栓治疗方案。

Stroke:头颈部感染的脑静脉血栓的患者可以用肝素抗凝吗?

背景:头部或颈部局部感染是脑静脉血栓形成的原因。肝素治疗感染性脑静脉血栓是有争议的。研究者调查是否这种治疗与颅内出血性并发症和不良的预后相关。方法:研究者从624个脑静脉血栓患者的前瞻性队列研究中提取数据。研究者比较有无头颈部感染进行抗凝和不抗凝治疗,患者死亡或残疾及新脑出血发生的差异。结果:604/624例患者有资格参与这项研究。57例(9.4%)患者头部或颈部感染。比较感染和非感染患者之间的数