How should the PAXgene Bone Marrow RNA Tubes be frozen after collection and for how long?
The PAXgene Bone Marrow RNA Tubes should be frozen at –20°C and –70°C in a wire rack, not in an expanded polystyrene foam tray.
If the PAXgene Bone Marrow RNA Tubes are to be stored at temperatures lower than –20ºC, freeze them first for 24 h at –20ºC, then transfer them to –70ºC.
Currently available data shows stabilization of cellular RNA for several months at –20°C or –70°C. For more information from ongoing studies evaluating stability for longer time periods, please contact QIAGEN Technical Services.