Int J Antimicrob Agents:多学科讨论:他汀或是对抗隐球菌感染的新武器

2017-07-21 贾朝娟 环球医学

由隐球菌病感染导致的肺炎和脑膜炎,并具有高死亡率。新型隐球菌C. gattii的毒性更大,标准的抗真菌治疗反应差。目前隐球菌病的治疗选择很少,已有的抗真菌药物因存在弊端尔使用受限,包括氟康唑(FLC)耐药和两性霉素的副作用。2017年6月,发表在《Int J Antimicrob Agents》的一项研究显示,阿托伐他汀(ATO)+FLC治疗的感染小鼠存活率增加。



由隐球菌病感染导致的肺炎和脑膜炎,并具有高死亡率。新型隐球菌C. gattii的毒性更大,标准的抗真菌治疗反应差。目前隐球菌病的治疗选择很少,已有的抗真菌药物因存在弊端尔使用受限,包括氟康唑(FLC)耐药和两性霉素的副作用。2017年6月,发表在《Int J Antimicrob Agents》的一项研究显示,阿托伐他汀(ATO)+FLC治疗的感染小鼠存活率增加。

由隐球菌导致的隐球菌病能引起肺炎和脑膜炎,并且由于可用的疗法不足和药物耐药性增加,在全球具有较高的死亡率。有必要开发有效的治疗,药物重新定位是一种有趣的替代方法,可具有治疗隐球菌的新策略。

阿托伐他汀(ATO),目前用于治疗高胆固醇血症的一种他汀,在本研究中考察了其作为辅助治疗对隐球菌导致感染的有效性。

评估了ATO对宿主和酵母作用的多个方面,尤其是针对ATO与氟康唑(FLC)之间的关联(i)减少细胞膜内麦角固醇含量和改变隐球菌多糖荚膜的性质;(ii)通过巨噬细胞增加活性氧类型的产生;(iii)减少酵母的吞噬作用和细胞内增殖率。

在动物模型中,ATO+FLC治疗的感染小鼠存活率增加,临床症状改善,肺和脑部的真菌负担减少。本研究是首次开展使用ATO+FLC治疗隐球菌症的体内研究。结果表明,ATO可能是隐球菌症一个重要的辅助治疗。

多学科讨论纪实:

1、开发新的治疗药物耗时长久且耗资巨大,且目前投资抗真菌领域的治疗药物开发远远少于其他领域。因此,已有药物的再次挖掘是一种可行的选择。

2、以往的研究已经证明,ATO的体外抗真菌和抗炎活性,主要用于肺部疾病的控制。在这项研究MIC数据表明,ATO单药对C. gattii有弱的抗真菌活性;以往的研究表明,他汀类药物对其他种类的真菌具有更好的治疗效果。

3、细胞膜麦角甾醇水平降低可能是ATO对抗真菌的最终作用,类似于唑类药物。

原始出处:

Ribeiro NQ, Costa MC, Magalhes TFF, et al. Atorvastatin as a promising anticryptococcal agent. Int J Antimicrob Agents. 2017 Jun;49(6):695-702. doi: 10.1016/j.ijantimicag.2017.04.005. Epub 2017 Apr 24.

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    2018-01-10 xjy02
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    2018-03-10 grace5700
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    2017-12-07 wjywjy
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    2017-07-23 xugc

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