Temperature alters Plasmodium blocking by Wolbachia.

Temperature alters Plasmodium blocking by Wolbachia.
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DOI:
10.1038/srep03932
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发表时间:
2014-02-03
期刊:
影响因子:
4.6
通讯作者:
Thomas MB
Thomas MB
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Murdock CC;Blanford S;Hughes GL;Rasgon JL;Thomas MB

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最近,亚洲斯氏按蚊(Anopheles Stephensi)被沃尔巴克氏菌wAlbB株稳定感染,对人类疟疾寄生虫恶性疟原虫产生了耐受性。然而,现场的条件可能与实验室的条件有很大不同。我们使用了啮齿动物疟疾约氏疟原虫,并通过身体传播了一只按蚊。Stephensi作为一个模型系统来研究wAlbB的传输阻断潜力在不同的热环境中是否可能是稳健的。在28℃时,wAlbB降低了疟原虫感染率和卵囊强度,在24℃时,对感染率没有影响,但显著增加了卵囊强度。在20℃时,wAlbB对患病率或强度没有影响。此外,我们还发现了wAlbB的一种新效应,它导致不同温度下的子孢子发育减少,抵消了24℃下卵囊的增强。我们的结果显示了温度对沃尔巴克氏菌-疟疾相互作用的复杂影响,并表明传播感染的影响可能在不同的环境中有所不同。
Very recently, the Asian malaria vector (Anopheles stephensi) was stably transinfected with the wAlbB strain of Wolbachia, inducing refractoriness to the human malaria parasite Plasmodium falciparum. However, conditions in the field can differ substantially from those in the laboratory. We use the rodent malaria P. yoelii, and somatically transinfected An. stephensi as a model system to investigate whether the transmission blocking potential of wAlbB is likely to be robust across different thermal environments. wAlbB reduced malaria parasite prevalence and oocyst intensity at 28°C. At 24°C there was no effect on prevalence but a marked increase in oocyst intensity. At 20°C, wAlbB had no effect on prevalence or intensity. Additionally, we identified a novel effect of wAlbB that resulted in reduced sporozoite development across temperatures, counterbalancing the oocyst enhancement at 24°C. Our results demonstrate complex effects of temperature on the Wolbachia-malaria interaction, and suggest the impacts of transinfection might vary across diverse environments.
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