A simplified method for identifying early CRISPR-induced indels in zebrafish embryos using High Resolution Melting analysis.
BMC Genomics
; 17: 547, 2016 08 04.
Article
en En
| MEDLINE
| ID: mdl-27491876
ABSTRACT
BACKGROUND:
The CRISPR/Cas9 system has become a regularly used tool for editing the genome of many model organisms at specific sites. However, two limiting steps arise in the process of validating guide RNA target sites in larvae and adults the time required to identify indels and the cost associated with identifying potential mutant animals.RESULTS:
Here we have combined and optimized the HotSHOT genomic DNA extraction technique with a two-steps Evagreen PCR, followed by a high-resolution melting (HRM) assay, which facilitates rapid identification of CRISPR-induced indels. With this technique, we were able to genotype adult zebrafish using genomic DNA extracted from fin-clips in less than 2 h. We were also able to obtain a reliable and early read-out of the effectiveness of guide RNAs only 4 h after the embryos were injected with the constructs for the CRISPR/Cas9 mutagenic system. Furthermore, through mutagenesis kinetic assay, we identified that the 2-cell stage is the earliest time point at which indels can be observed.CONCLUSIONS:
By combining an inexpensive and rapid genomic DNA extraction method with an HRM-based assay, our approach allows for high-throughput genotyping of adult zebrafish and embryos, and is more sensitive than standard PCR approaches, permitting early identification of CRISPR-induced indels and with applications for other model organisms as well.Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Pez Cebra
/
Técnicas de Amplificación de Ácido Nucleico
/
Mutación INDEL
/
Repeticiones Palindrómicas Cortas Agrupadas y Regularmente Espaciadas
/
Sistemas CRISPR-Cas
Límite:
Animals
Idioma:
En
Revista:
BMC Genomics
Asunto de la revista:
GENETICA
Año:
2016
Tipo del documento:
Article
País de afiliación:
Canadá