迅速高效的基因編輯技術,利用gRNA辨識基因編輯位置,引導Cas9至該位置後造成DNA雙股斷裂, 以進行後續的基因編輯。
該技術可以除了單純的DNA雙股斷裂造成indel的發生,亦可以利用HDR template來達成想要的突變形式,如:基因敲除、基因敲入、點突變、基因轉殖。
細胞類型 | 時間 | 成功率 | 脫靶率 | |
CRISPR/Cas | 大部分皆可 | 約3個月 | >90% | >50% |
Homologous recombination | 胚胎幹細胞 | 約6個月 | <25% | <5% |
Process | Contents | Period | |
1 | Construction of targeting vector | 1. Understand customer demand of target genes to select targeting sites 2. Cloning targeting sequences for guide RNA 3. Construction of targeting vector by guide RNA sequences, reporter gene(EGFP) and Cas9 expression vector | Approx. 1 months |
---|---|---|---|
2 | Establishment of ES cell lines with CRISPR/Cas9-mediated deletion | 4. Electroporation of the targeting vector into ES cells. 5. Derivation of EGFP-positive ES cell clones. 6. Screening clones for CRSPR/Cas9-mediated deletion. 7. Expansion and establishment of ES cell lines with biallelic deletion. | Approx. 2 months |