Cell Host & Microbe:给蚊子注射细菌可阻断寨卡病毒传播

2016-05-10 佚名 生物谷

图片摘自:www.scientificamerican.com 近日,来自巴西的研究人员通过研究表示,感染沃尔巴克氏体或许可以明显降低蚊子传播寨卡病毒的风险,相关研究刊登于国际杂志Cell Host & Microbe上,而这一研究为开发新型方法来阻断寨卡病毒的感染和传播提供希望。 如今在诸如澳大利亚、巴西、印度尼西亚及越南等国家中研究者已经大量释放沃尔巴克氏体来感染蚊子作为抑制

图片摘自:www.scientificamerican.com

近日,来自巴西的研究人员通过研究表示,感染沃尔巴克氏体或许可以明显降低蚊子传播寨卡病毒的风险,相关研究刊登于国际杂志Cell Host & Microbe上,而这一研究为开发新型方法来阻断寨卡病毒的感染和传播提供希望。

如今在诸如澳大利亚、巴西、印度尼西亚及越南等国家中研究者已经大量释放沃尔巴克氏体来感染蚊子作为抑制登革热的新型策略,而如今这项研究发现,利用沃尔巴克氏体同样也可以帮助抵御寨卡病毒的传播。寨卡病毒和个体出生缺陷头小畸形直接相关,而这种个体出生缺陷疾病目前在南美和中美洲地区及加勒比地区席卷开来。

今年2月时,世界卫生组织就发布公告称,寨卡病毒疫情已经使得全球进入卫生紧急戒备状态;寨卡病毒和小头畸形(Microcephaly)之间的关联也于去年秋季在巴西发现,随后研究者证实有1100多例小头畸形的发病都与其母亲寨卡病毒感染直接相关。

这项研究中,研究人员利用沃尔巴克氏体来进行研究,沃尔巴克氏体可以在昆虫细胞中生存,而且目前发现沃尔巴克氏体可以在多达60%的常见昆虫机体中生存,文章中研究者将沃尔巴克氏体注入到蚊子的卵中,随后沃尔巴克氏体就会随着蚊子的繁衍而不断传播到其后代中。

研究者Luciano Moreira说道,我们可以利用几个月的时间释放携带沃尔巴克氏体的伊蚊,随后这些携带者就会同自然种群进行交配,随着时间延续就会慢慢改变蚊子的群体特征。这项研究中研究者利用当前在巴西流行的两种寨卡病毒分别感染田间蚊子(对照)和被沃尔巴克氏体感染的蚊子,两周后,研究者发现携带沃尔巴克氏体的蚊子机体和唾液中存在较低水平的病毒颗粒,同时其感染人类的能力也明显下降了,这就表明沃尔巴克氏体或许可以有效帮助抵御蚊子传播寨卡病毒。

来自宾州州立大学的研究者Jason Rasgon表示,在此前的实验中我们发现沃尔巴克氏体在抑制一种病原体传播的时候会增强另外一种病原体的传播,而这项研究完全消除了我们的顾虑。研究者Moreira最后说道,本文研究提出的策略并不是100%有效,而且也并不会完全消除病毒,但这种新型策略的确可以用来抑制当前寨卡病毒的传播和流行。

原始出处:

Dutra HL,Rocha MN et al.Wolbachia Blocks Currently Circulating Zika Virus Isolates in Brazilian Aedes aegypti Mosquitoes.Cell Host Microbe. 2016 May 3.

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    2016-12-17 xjy02
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    2017-01-13 docwu2019
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