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Nature子刊:又来一篇!“诺奖得主”青蒿素或可治疗肺结核

2016-12-22 生物探索 生物探索

导读 本月初,发表在Cell上的一项研究发现,“诺奖得主”青蒿素能够实现α细胞向β细胞的转变,为糖尿病治疗带来了新的惊喜。而就在本周,科学家们又看到这一抗疟药物在肺结核治疗中的应用前景。相关成果发表在Nature子刊上。

导读 本月初,发表在Cell上的一项研究发现,“诺奖得主”青蒿素能够实现α细胞向β细胞的转变,为糖尿病治疗带来了新的惊喜。而就在本周,科学家们又看到这一抗疟药物在肺结核治疗中的应用前景。相关成果发表在Nature子刊上。



12月19日,发表在Nature Chemical Biology上题为“Inhibitors of Mycobacterium tuberculosis DosRST signaling and persistence”的研究中,密歇根州立大学(Michigan State University,MSU)的科学家们发现,挽救了数百万人生命的抗疟药物青蒿素可能能够帮助治疗肺结核,减缓耐药性的发展。该研究的通讯作者是MSU的微生物学家Robert Abramovitch。


Robert Abramovitch

具体来说,研究发现,青蒿素阻断了结核分枝杆菌变成休眠状态的能力。这个状态通常会使得所用的抗生素无效。Abramovitch说:“当结核分枝杆菌处于休眠状态时,它们会对抗生素变得高度耐受。阻断休眠会使得肺结核细菌对药物更加敏感,从而有望缩短治疗时间。”

据研究人员介绍,结核分枝杆菌在体内生长需要氧气的存在。机体的免疫系统会通过使细菌“缺氧”控制感染。这一研究中,科学家们发现,青蒿素靶向了一个叫血红素的分子。它是结核分枝杆菌的氧传感器。通过破坏这一传感器(基本上是关闭它),青蒿素阻止了细菌感知自己获得多少氧气的能力。

Abramovitch解释道:“当结核分枝杆菌缺氧时,它们会进入休眠状态,保护自己免受低氧环境的压力。但如果结核分枝杆菌不能感知低氧环境,它将不能进入休眠状态,然后死亡。”

在筛选了540,000种不同的化合物后,研究小组还找到了5种其它的靶向结核分枝杆菌氧传感器的化学抑制剂。这些化合物也有望用于结核病治疗。

Abramovitch说:“全球有二十亿人感染结核分枝杆菌。结核病是一个全球性问题,需要新的方法来延缓它的传播,克服耐药性。一些患者常常不能坚持他们的治疗方案,因为治愈这一疾病需要花费的时间较长。不完全的治疗在多重耐药结核菌株的发展和传播中发挥了重要的作用。”这一研究提出了靶向休眠细菌的新方法,或许能够改变结核病的治疗。

编辑推荐

最近,科学家们似乎看到了“诺奖得主”青蒿素在多种疾病中的治疗潜能。本月初,发表于Cell杂志上的一项研究中(论文题目:Artemisinins Target GABAA Receptor Signaling and Impair α Cell Identity),来自奥地利科学院等机构的科学家发现,青蒿素能够实现α细胞向β细胞的转变,为糖尿病治疗带来了新的惊喜。小编曾在《Cell重大突破:“诺奖得主”青蒿素或可治疗糖尿病》一文中报道了这一重要成果。

原始出处:

[2] Huiqing Zheng,et al. Inhibitors of Mycobacterium tuberculosis DosRST signaling and persistence. Nature Chemical Biology .19 December 2016.

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    2017-01-23 liye789132251
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    2017-01-22 studylzc

    又是青蒿素,了不起!

    0

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    2016-12-24 wumeihua90
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