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Do you recommend a particular supplier for siRNA duplexes for use in Nucleofection ?

For siRNA applications using the Nucleofector technology we recommend siRNA duplexes from Dharmacon, part of Thermo Fischer Scientific.

Can I use the protocol for MCF7 cells for other breast cancer cell lines?

No. Often times closely related cell types will require completely different conditions for Nucleofection™. Therefore, you may want to consider performing a full optimization by using the Cell Line Optimization Kit. Please click on the related link...

When nucleofecting cancer cell lines, do I need to be concerned about passage number?

For the most efficient gene transfer, we recommend using cells that are in logarithmic growth phase and at a passage number of 10-15 (from the time of thaw). This is because some cell lines differentiate and change their features after many...

How can I determine the correct centrifugation speed for my particular centrifuge and rotor?

The correct rotor speed can be calculated by measuring the maximum radius of your rotor and entering the information into the table found on the website which can be reached by clicking on the Related Link.

Why am I not able to detect my fluorescent labeled siRNA (e.g. FITC) after 24 or 48 hours post-Nucleofection?

Fluorescently labeled siRNA duplexes can be used to analyze transfection efficiency by fluorescence microscopy or flow cytometry. However, FITC, Rhodamine, or Alexa-488 labeled siRNA oligos should be analyzed 0.5-3 hours post-Nucleofection™. Cy-5...

Is the age of the mice important for my mouse T cell Nucleofection?

Yes. We recommend using mice between 6-12 weeks. Using mouse T cells isolated from younger or older animals for Nucleofection™ may result in much lower transfection efficiencies and/or viabilities.

I have been having trouble with "clumping" with my PC12 cells. Do you have any recommendations?

Yes. As PC12 cells often tend to clump we recommend resuspending these cells as thoroughly as possible with a sterile 1mL pipette tip or transfer pipette from your Nucleofector™ kit. This circumvents potential fusion of cells due to the...

Does the recovery medium contained in the Mouse T Cell Nucleofector Kits contain any immunogenic substances?

No. The post Nucleofection™ Recovery media contains no immunogenic factors and should not influence cell stimulation or differentiation. For Mouse T cells, some experiments have shown that after Nucleofection™ cells can be stimulated efficiently in...

What is a Neural Stem Cell (NSC)?

Neural stem cells are adult stem cells but you also find them in embryos (already in "adult" differentiation status) and they have the potential to develop into neurons and glial cells. We recommend isolating them from rat and mouse embryos because...

I see activation of my monocytes (or macrophages or DCs) following Nucleofection. Why is this? What can I do to address this problem?

We have examined the effects of Nucleofection™ (without DNA) on these cells and have not observed significant activation. This indicates that neither the Nucleofector™ Solution, the Nucleofector™ Program nor the recovery medium are sufficient for...