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Phytomedicine:植物粉末挽救了生命垂危的疟疾患者

2017-04-25 佚名 cnBeta

现在科学家已发现对青蒿素有不同程度抗药性的疟原虫。事实上,世界卫生组织曾表示,感染人类的五种疟原虫中有三种已对主要抗疟药物产生耐药性。所以当刚果的 18 名患者对治疗疟疾的常规药物没有反应时,医生知道他们必须采取行动来尝试不同的治疗方案。他们不是选择使用更多的合成药,而是转向大自然,并找到了一个取得了显着成果的解决方案。医生首先用世界卫生组织(WHO)推荐的方案治疗患者:青蒿素药物联合疗法 (AC



现在科学家已发现对青蒿素有不同程度抗药性的疟原虫。事实上,世界卫生组织曾表示,感染人类的五种疟原虫中有三种已对主要抗疟药物产生耐药性。所以当刚果的 18 名患者对治疗疟疾的常规药物没有反应时,医生知道他们必须采取行动来尝试不同的治疗方案。他们不是选择使用更多的合成药,而是转向大自然,并找到了一个取得了显着成果的解决方案。

医生首先用世界卫生组织(WHO)推荐的方案治疗患者:青蒿素药物联合疗法 (ACT)。随着患者状态继续恶化(其中一名五岁儿童甚至昏迷), 医生首先为患者注射一种称为青蒿琥酯(artesunate)的药物,但治疗无效。最后,医生转向青蒿植物本身。



而美国伍斯特理工学院生物与生物技术教授 Pamela Weathers 在 25 年前开始研究青蒿。 Weathers 与博士后 Melissa Towler 一起研发了一种药丸,仅仅是由青蒿叶子加工制得的干燥粉末制作而成。连续五天给这 18 名生命垂危的患者服用药片后,他们全部恢复,血液中没有残留疟原虫的痕迹。

Weathers 表示:“这 18 名患者曾命悬一线。所以当看到他们完全恢复时非常令人惊讶。这是一项小小的研究,但结果却是强大的。”

Weathers 曾经显示,可以在青蒿植物干叶中提取 40 多倍的青蒿素。 她随后也通过实验表明,不仅叶片能够在小鼠中击败耐药细菌,而且通过 49 代小鼠传播疟原虫后,疟原虫对这种植物仍然没有产生抗药性。虽然青蒿植物运作的确切机制尚不清楚,但 Weathers 表示,这可能是由于叶片中植物化学物质之间发生的复杂化学反应。

由于这种药物价格低廉而且生产相对简单,Weathers 也表示,它可能为疟疾多发地区的居民带去这种药物,例如加纳,肯尼亚和马拉维等。 “这种简单的技术可以由非洲人拥有,经营和分配,”Weathers 已经在非洲大陆建立了一个供应链,并使用当地的青蒿叶子。

Weathers 也表示,进一步研究青蒿植物干叶能会有效地对抗其他疾病:“我们已经做了大量的工作来了解这些化合物的生物化学,包括许多类黄酮和萜烯类物质,所以我们可以更好地了解它们在干叶药理活性中的作用。我们研究地越深入,我们就越有兴趣将类物作为全球抗疟药物的药物。青蒿已被证明能对抗其他一些疾病,包括对其他热带疾病和某些癌症有效。在我们的实验室,我们正在调查青蒿植物干叶是否能有效对抗其他疾病。:

这项研究成果已于近日发表在《Phytomedicine》上。

原始出处:

Nsengiyumva Bati Daddy, Luc Malemo Kalisya, Pascal Gisenya Bagire, et al. Artemisia annua, dried leaf tablets treated malaria resistant to ACT and i.v. artesunate: case reports. Phytomedicine. 2017 Apr 14.

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    2017-05-31 kalseyzl
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    2018-04-02 xuyong535
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    2018-01-03 jeanqiuqiu
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    2017-04-26 为啥子

    返璞归真啊……

    0

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    2017-04-26 飛歌

    学习了很有用

    0

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