Cryopreservation and Laser Nanowarming of Zebrafish Embryos Followed by Hatching and Spawning.

Cryopreservation and Laser Nanowarming of Zebrafish Embryos Followed by Hatching and Spawning.
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DOI:
10.1002/adbi.202000138
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发表时间:
2020-11
影响因子:
4.1
通讯作者:
Bischof J
Bischof J
中科院分区:
生物学3区
文献类型:
--
作者:
Khosla K;Kangas J;Liu Y;Zhan L;Daly J;Hagedorn M;Bischof J

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这项研究首次展示了将冷冻保存的斑马鱼胚胎重新加热的能力,这些胚胎可以长成能够正常繁殖的成鱼。该方案采用单次注射冷冻保护剂(CPA)和金纳米棒(GNRs)到蛋黄中,并浸入预冷浴中以覆盖卵黄周空间。然后将胚胎封装在CPA和GNR液滴中,浸入液氮中,低温稳定,并通过激光脉冲重新加热。激光照射后,胚胎(n = 282)在1 h内表现出完整的结构(40%),3 h后继续发育(22%),24 h后运动(11%),48 h后孵化(9%),第5天后游泳(3%)。最后,从存活至第5天的鱼中,两个幼虫生长至成年并产卵,产生与解冻对照相当的存活率。未来的努力将集中在提高成年期的存活率,并开发冷冻保存大量胚胎的方法,用于研究,水产养殖和生物多样性保护。
This study shows for the first time the ability to rewarm cryopreserved zebrafish embryos that grow into adult fish capable of breeding normally. The protocol employs a single injection of cryoprotective agents (CPAs) and gold nanorods (GNRs) into the yolk and immersion in a precooling bath to dehydrate the perivitelline space. Then embryos are encapsulated within CPA and GNR droplets, plunged into liquid nitrogen, cryogenically stabilized, and rewarmed by a laser pulse. Postlaser nanowarming, embryos (n = 282) exhibit intact structure by 1 h (40%), continued development after 3 h (22%), movement after 24 h (11%), hatching after 48 h (9%), and swimming after Day 5 (3%). Finally, from fish that survives till Day 5, two larvae are grown to adulthood and spawned, yielding survival comparable to an unfrozen control. Future efforts will focus on improving the survival to adulthood and developing methods to cryopreserve large numbers of embryos for research, aquaculture, and biodiversity preservation.
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