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To attain efficient and reliable siRNA or microRNA transfection, we offer DharmaFECT transfection reagents. DharmaFECT 1 is our most all-purpose transfection reagent formulation; demonstrating efficient, low-toxicity delivery to over 35 cell types. DharmaFECT 1 achieves effective transfection of siRNA and microRNA reagents at low concentrations and with low cytotoxicity, especially when compared to transfection reagents designed for use with plasmid DNA.
While DharmaFECT 1 is the most all-purpose transfection reagent (demonstrating efficient, low-toxicity delivery to over 80% of validated cell types), DharmaFECT 2, 3, and 4 are available to support a wider range of cell types. Distinct formulations permit more thorough optimization of transfection for novel cell types, high-value experiments, and RNAi screening.
Consult the DharmaFECT Cell Type Guide of transfection optimization results for the DharmaFECT formulation that is recommended for your cell type.
Please contact your local sales representative or our Technical Support team for pricing and availability of DharmaFECT Transfection Reagents in the 2 x 10 mL size.
DharmaFECT reagents are effective across a broader range of experimental conditions when compared to Lipofectamine® 2000 (Invitrogen). Several cell densities and lipid volumes were investigated to determine optimal transfection conditions, shown by the shaded boxes. Three cell densities of HepG2 cells were transfected with GAPD siRNA (100 nM) using a range of volumes (0.05 to 1.6 μL/well) of Lipofectamine 2000 and DharmaFECT 4 transfection reagents. mRNA levels (bars) were assessed by branched DNA assay (Panomics Quantigene® Reagent System) and cell viability (data points) was determined by alamarBlue® (Biosource International).
Table adapted from Borawski et al. A study by scientists at Novartis concluded that in transfection optimization in 384-well format (in preparation for screening) one of the four DharmaFECT transfection reagents outperformed all other reagents in delivery efficiency and overall cell viability in 9 of 10 cell lines. Lipid transfection reagents tested were DharmaFECT 1-4, HiPerFect® (Qiagen), TransIT-TKO® (Mirus) Lipofectamine® 2000 and Oligofectamine® (Invitrogen). J. Borawski et al., Optimization Procedure for small interfering RNA Transfection in a 384-well format. J. Bimolecular Screening, 12, 546-559 (2007).
To determine transfection efficiencies at low siRNA concentrations, two genes were targeted with various amounts of SMARTpool siRNA reagent. DharmaFECT achieved > 80% silencing at all siRNA concentrations, while HiPerFect (Qiagen) only achieved this level with PPIB at 100 nM. HeLa cells were transfected with SMARTpool TM reagents targeting Cyclophilin B (PPIB) or MAPKI at concentrations of 1, 5, 25, and 100 nM. mRNA expression (bars) was determined by branched DNA assay (Panomics Quantigene® Reagent System) and cell viability (data points) was determined by alamarBlue® (Biosource International).
J. Borawski et al., Optimization Procedure for small interfering RNA Transfection in a 384-well format. J. Bimolecular Screening. 12, 546-559 (2007).