Site Directed Mutagenesis (SDM) Human Deletion MCF-7

Get tips on using Click-iT™ EdU Pacific Blue™ Flow Cytometry Assay Kit to perform Cell cycle assay human - MCF 10A

Get tips on using EpiTect ChIP OneDay Kit to perform ChIP Human - HUH-7

Get tips on using JAM-A CRISPR/Cas9 KO Plasmid (h) to perform CRISPR Human - Deletion F11R

Get tips on using GeneArt™ CRISPR Nuclease Vector with OFP Reporter Kit to perform CRISPR Human - Deletion FUT8

Get tips on using GeneArt™ CRISPR Nuclease Vector with OFP Reporter Kit to perform CRISPR Human - Deletion TRIM25

Get tips on using GeneArt™ CRISPR Nuclease Vector with OFP Reporter Kit to perform CRISPR Human - Deletion DJ-1

The RNA-guided CRISPR-Cas9 nuclease system has revolutionized the genome editing practices. For the most part, the Cas9-mediated genome editing is performed either via nonhomologous end joining (NHEJ) or homology-directed repair (HDR) in mammalian cells, However, designing of specific sgRNAs and minimizing off-target cleavage mediated mutagenesis are the major challenges in CRISPR-Cas based genome editing. To circumvent these issues, we can take advantages of many available tools and approaches for sgRNA construction and delivery.

The RNA-guided CRISPR-Cas9 nuclease system has revolutionized the genome editing practices. For the most part, the Cas9-mediated genome editing is performed either via nonhomologous end joining (NHEJ) or homology-directed repair (HDR) in mammalian cells, However, designing of specific sgRNAs and minimizing off-target cleavage mediated mutagenesis are the major challenges in CRISPR-Cas based genome editing. To circumvent these issues, we can take advantages of many available tools and approaches for sgRNA construction and delivery.

Get tips on using CytoSelect™ 24-Well Wound Healing Assay to perform Wound healing assay cell type - human RT-7

Short hairpin or small hairpin RNA (shRNA) is artificial RNA, which has a hairpin loop structure, and uses inherent microRNA (miRNA) machinery to silence target gene expression. This is called RNA interference (RNAi). These can be delivered via plasmids or viral/bacterial vectors. Challenges in shRNA-mediated gene silencing include 1. Off-target silencing, 2. Packaging shRNA encoding lentivirus, and 3. Stable transduction in cells. RNAi has been designed to have anywhere from 19-27 bs, but the most effective design has 19 bp. In case commercial shRNAs are not available, potential target sites can be chosen within exon, 5’- or 3’ UTR, depending on which splice variants of the gene are desired. One should use the latest algorithms and choose at least two different sequences, targeting different regions, in order to have confidence in overcoming off-target effects. A BLAST search after selecting potential design will eliminate potential off-target sequences. For the second challenge, sequencing the vector using primers for either strand (50-100 bp upstream) is suggested, along with using enzymatic digestion on agarose gel for the vector. Next, once the shRNA-containing vector is packaged in a virus, it is important to check the viral titer before transduction. Finally, using a marker in the lentiviral vector (fluorescent protein or antibiotic resistance), along with qPCR for target gene expression can help in determining the efficacy of transduction and shRNA on its target site.