Cryopreservation of Anopheles stephensi embryos.

Cryopreservation of Anopheles stephensi embryos.
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DOI:
10.1038/s41598-021-04113-x
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发表时间:
2022-01-07
期刊:
影响因子:
4.6
通讯作者:
Billingsley PF
Billingsley PF
中科院分区:
综合性期刊3区
文献类型:
--
作者:
James ER;Wen Y;Overby J;Pluchino K;McTighe S;Matheny S;Eappen A;Hoffman SL;Billingsley PF

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冷冻保存蚊子的能力将通过保存目前需要持续生命周期维护的种群、新分离株、实验室培育的品系和转基因品系,彻底改变这些人类主要传染病载体的工作。几十年来,人们一直在努力开发一种冷冻保存方法,但到目前为止,这种方法还是没有结果:我们在这里描述了一种斯氏按蚊胚胎冷冻保存的方法,孵化率约为25%,稳定期> 5年。孵化的幼虫发育成可生育的、多产的成虫和吸血的雌性,产生完全可存活的第二代卵,其可被恶性疟原虫以高强度感染。冷冻保存方法的关键组成部分是:产卵后15-30分钟的胚胎,在-7 °C和-14.5 °C的100%氘代甲醇中孵育两个步骤,并快速冷却。通过快速加温并同时稀释冷冻保护剂来回收卵。转基因鸡蛋A。stephensi和A.冈比亚也被成功地冷冻保存。这种使能方法将允许长期保护蚊子,以及加速遗传研究和促进大量储存的按蚊释放计划。
The ability to cryopreserve mosquitoes would revolutionize work on these vectors of major human infectious diseases by conserving stocks, new isolates, lab-bred strains, and transgenic lines that currently require continuous life cycle maintenance. Efforts over several decades to develop a method for cryopreservation have, until now, been fruitless: we describe here a method for the cryopreservation of Anopheles stephensi embryos yielding hatch rates of ~ 25%, stable for > 5 years. Hatched larvae developed into fertile, fecund adults and blood-fed females, produced fully viable second generation eggs, that could be infected with Plasmodium falciparum at high intensities. The key components of the cryopreservation method are: embryos at 15–30 min post oviposition, two incubation steps in 100% deuterated methanol at − 7 °C and − 14.5 °C, and rapid cooling. Eggs are recovered by rapid warming with concomitant dilution of cryoprotectant. Eggs of genetically modified A. stephensi and of A. gambiae were also successfully cryopreserved. This enabling methodology will allow long-term conservation of mosquitoes as well as acceleration of genetic studies and facilitation of mass storage of anopheline mosquitoes for release programs.
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