Electroporation of sheep zygotes as an alternative to microinjection for the generation of CRISPR/Cas genome edited models

IF 2.5 2区 农林科学 Q3 REPRODUCTIVE BIOLOGY
Marcela Souza-Neves , Jorge Luis Pórfido , Martina Crispo , Alejo Menchaca
{"title":"Electroporation of sheep zygotes as an alternative to microinjection for the generation of CRISPR/Cas genome edited models","authors":"Marcela Souza-Neves ,&nbsp;Jorge Luis Pórfido ,&nbsp;Martina Crispo ,&nbsp;Alejo Menchaca","doi":"10.1016/j.theriogenology.2025.117603","DOIUrl":null,"url":null,"abstract":"<div><div>Zygote microinjection is considered the most suitable technique to introduce CRISPR/Cas9 reagents for efficient genome editing in livestock. In this study, zygote electroporation was evaluated as an alternative to microinjection for CRISPR/Cas9-mediated genome editing in sheep. Four experiments were conducted on 3548 cumulus-oocyte complexes. Acid Tyrode's solution (AT) was used to partially degrade the zona pellucida (ZP) to improve reagent entry, resulting in ZP thinning with longer AT exposure (<em>P</em> &lt; 0.05). Although early embryo development was impaired by AT exposure (<em>P</em> &lt; 0.05), blastocyst rates were similar across all groups by day 8. Electroporation conditions were optimized by testing pulse length (1 or 3 ms), with the best results from 6 pulses of 20 V for 3 ms with AT during 60 s. Electroporation with 500 ng/μL Cas9 and 300 ng/μL sgRNA with AT during 60 s achieved a 38.5 % mutation rate. When compared with conventional microinjection, electroporation had higher developmental rates but a lower mutation rate (21.4 % vs. 60.0 %; <em>P</em> &lt; 0.05). These findings suggest that electroporation is a viable, cost-effective technique for genome editing in sheep. Nevertheless, further research will be required to fine-tune electroporation conditions and enhance efficiency in terms of mutation rate.</div></div>","PeriodicalId":23131,"journal":{"name":"Theriogenology","volume":"248 ","pages":"Article 117603"},"PeriodicalIF":2.5000,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Theriogenology","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0093691X25003292","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"REPRODUCTIVE BIOLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

Zygote microinjection is considered the most suitable technique to introduce CRISPR/Cas9 reagents for efficient genome editing in livestock. In this study, zygote electroporation was evaluated as an alternative to microinjection for CRISPR/Cas9-mediated genome editing in sheep. Four experiments were conducted on 3548 cumulus-oocyte complexes. Acid Tyrode's solution (AT) was used to partially degrade the zona pellucida (ZP) to improve reagent entry, resulting in ZP thinning with longer AT exposure (P < 0.05). Although early embryo development was impaired by AT exposure (P < 0.05), blastocyst rates were similar across all groups by day 8. Electroporation conditions were optimized by testing pulse length (1 or 3 ms), with the best results from 6 pulses of 20 V for 3 ms with AT during 60 s. Electroporation with 500 ng/μL Cas9 and 300 ng/μL sgRNA with AT during 60 s achieved a 38.5 % mutation rate. When compared with conventional microinjection, electroporation had higher developmental rates but a lower mutation rate (21.4 % vs. 60.0 %; P < 0.05). These findings suggest that electroporation is a viable, cost-effective technique for genome editing in sheep. Nevertheless, further research will be required to fine-tune electroporation conditions and enhance efficiency in terms of mutation rate.
羊受精卵电穿孔作为显微注射的替代方法,用于生成CRISPR/Cas基因组编辑模型
受精卵显微注射被认为是引入CRISPR/Cas9试剂对牲畜进行高效基因组编辑的最合适技术。在这项研究中,受精卵电穿孔作为一种替代显微注射的方法在绵羊中进行CRISPR/ cas9介导的基因组编辑。对3548个卵母细胞复合物进行了四项实验。酸性Tyrode’s溶液(AT)部分降解透明带(ZP),以改善试剂进入,导致ZP随着AT暴露时间的延长而变薄(P <;0.05)。尽管AT暴露会损害早期胚胎发育(P <;0.05),第8天各组囊胚率相近。通过测试脉冲长度(1 ms或3 ms)来优化电穿孔条件,在60 s的时间内,20 V、3 ms的6个脉冲具有最佳效果。用500 ng/μL Cas9和300 ng/μL sgRNA与AT电穿孔60 s,突变率达到38.5%。与常规显微注射相比,电穿孔的发育率更高,突变率更低(21.4% vs. 60.0%;P & lt;0.05)。这些发现表明,电穿孔是一种可行的、具有成本效益的绵羊基因组编辑技术。然而,需要进一步的研究来微调电穿孔条件,并在突变率方面提高效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Theriogenology
Theriogenology 农林科学-生殖生物学
CiteScore
5.50
自引率
14.30%
发文量
387
审稿时长
72 days
期刊介绍: Theriogenology provides an international forum for researchers, clinicians, and industry professionals in animal reproductive biology. This acclaimed journal publishes articles on a wide range of topics in reproductive and developmental biology, of domestic mammal, avian, and aquatic species as well as wild species which are the object of veterinary care in research or conservation programs.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信