What is the purpose of siRNA transfection?
Small interfering RNA (siRNA) is a 20-28 nucleotide double stranded RNA (dsRNA) molecule often referred to as “silencing RNA” . siRNA is used in the gene silencing (or RNA Interference, RNAi) technique to suppress gene expression.
How long is siRNA transfection?
5–7 days
Gene silencing resulting from siRNA can be assessed as early as 24 hours post-transfection. The effect most often will last from 5–7 days. However, the duration and level of knockdown are dependent on the cell type and concentration of siRNA. Transfections may be repeated to maintain silencing.
What is the difference between lipofectamine 2000 and rnaiMaX?
Lipofectamine® rnaiMaX reagent is designed specifically for the delivery of sirna and mirna while Lipofectamine® 2000 reagent delivers Dna or sirna with excellent transfection performance for protein expression, gene silencing, and functional assays.
Where does the siRNA go when it’s introduced into a cell?
Once siRNA enters the cell it gets incorporated into other proteins to form the RISC. Once the siRNA is part of the RISC complex, the siRNA is unwound to form single stranded siRNA. Once the single stranded siRNA (part of the RISC complex) binds to its target mRNA, it induces mRNA cleavage.
What is considered a good siRNA knockdown?
Usually, 50% knockdown is considered acceptable.
How long can siRNA last?
Can I resuspend siRNA in water?
SiRNA buffer is recommended for long term storage, you can resuspend your SiRNA in RNAse free molecular grade water (or 0.22µm filtered DEPC treated water) for immediate use.
What are the considerations for a successful siRNA transfection?
Other considerations for a successful siRNA transfection include the current health of the cultured cells, the conditions under which transfection occurs, and the method of transfection that is followed. Cells must be extremely healthy in order to ensure maximum viability. Healthy cells are easier to transfect than damaged, poor quality cells.
Is transfection optimization required for the Nucleofector?
For the transfection of primary cells and cell lines using the Nucleofector TM Technology, transfection optimization is usually not required. Lonza provides ready-to-use, cell type-specific Optimized Protocols for more than 150 cell types. In addition, our Knowledge Database contains transfection data for close to 1500 cell types.
What is transfection?
Transfection of hard-to-transfect cells, including primary cells, stem cells, neurons and cell lines, as well as cells in adherence.
How to prepare plasmid DNA and siRNA for transfection?
Dilute plasmid DNA or siRNA in nuclease-free water or an appropriate buffer. Keep the required volume of plasmid DNA or siRNA as small as possible. Prepare one Nucleofector cuvette with either 1 µg of siRNA or 0.5 µg of plasmid DNA for each transfection. Perform one transfection at a time.