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Is your pmaxGFP control vector supplied with the Nucleofector® Kits suitable for stable expression?

No. This vector is only supplied in our Nucleofector® Kits as a positive control and cannot be used for selection because it does not contain a mammalian selection marker. The only resistance gene expressed by this vector is kanamycin which is...

Do you have any recommended methods for detaching human monocytes from the plate for assaying or before Nucleofection®?

We have had good results by incubating the cells in ice cold PBS for 10 minutes and then rinsing the plates. Alternatively, the cells can be detached without a medium change by gently pipetting the cell suspension up and down. Our experience has also...

How do you recommend that we isolate splenic lymphocytes from mouse spleens for Nucleofection®? Is erythrocyte lysis required?

For the preparation of mouse spleen cells we recommend cutting the spleen once and passing the tissue through a 100µM cell strainer or steel mesh using a plunger. The cells are flushed into a petri dish containing PBS. In order to remove fat, cell...

Do you recommend positive selection or depletion for the purification of Human monocytes for Nucleofection®?

We only recommend the depletion method. For Example, the RosetteSep™ Isolation Kit for human monocytes [Stem Cell Technologies, Cat. No 15028]. The advantage of depletion is that the monocytes are left untouched by antibodies during the process.

Does it matter if the PBS used for monocyte enrichment contains calcium and magnesium, if the cells should be used later in Nucleofection®?

The PBS should be calcium and magnesium free to prevent clumping of cells. We routinely use PBS without calcium and magnesium for example Lonza Cat. No. BEBP17-516Q

What is the basic principle of the Nucleofector® Technology?

The Nucleofector® Technology is a novel transfection method especially designed for the needs of primary cells and difficult-to-transfect cell lines. It is a non-viral method based on a unique combination of electrical parameters and cell-type...

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.

Why is the Nucleofector®Technology ideal for primary cells and difficult-to-transfect cell lines?

There are several reasons to choose the Nucleofector® Technology for your gene transfer experiments. One is the direct transfer of DNA to the cell nucleus. This makes gene expression independent from cell division. Therefore, the technique is the...

What optimization is necessary to get the Nucleofector® Technology to work?

None. For each cell type in our product list we offer a cell-type specific solution and thoroughly optimized electrical parameters. These are already pre-programmed in the Nucleofector® Device. Additionally our optimized protocols give you...

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...
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