Verapamil can enhance live cell staining of Actin & Tubulin with SiR-dyes

SiR-actin and SiR-tubulin kits now contain Verapamil

Fig 3 c -

STED image (raw data) : axons of rat primary hippocampal neurons stained with SiR-actin at 16 days in vitro

Recently, we were pleased to launch highly innovative tools to stain actin and tubulin in living cells without the need to transfect cells with vectors coding for GFP- or RFP tagged proteins which bind to filamentous cytoskeletal structures. This makes the SiR stains produced by Spirochrome the only tools available on the market which allow direct live cell imaging of actin and tubulin. I introduced you to this technology, as well as the benefits of SiR-actin and SiR-tubulin, in a recent post 2 new Actin and Tubulin live-cell imaging stains – without transfection.

Quite a number of cell types have already been successfully stained with SiR dyes, e.g. HeLa cells, Vero cells, BHK cells and a lot more cell lines, as well as primary cells such as HUVECs cells, dermal fibroblasts, and hippocampal neurons.

However, it turned out that some cell types, especially cell lines, do not sufficiently take up the dye. In these cases, the addition of Verapamil usually increases the uptake efficiency significantly and results in satisfying staining. [Read more…]

2 new Actin and Tubulin live-cell imaging stains – without transfection!

Cytoskeletal live-cell imaging is extremely powerful when investigating cellular processes such as cytokinesis, motility and organelle transport and organization. The current experimental procedures remain nevertheless cumbersome and long. This post demonstrates how cell permeable, transfection free, Tubulin and Actin red fluorescent dyes help Cell biologists in analysing cytoskeleton dynamics in living cells.

[Read more…]