I used 0.125% (w/v) collagenase-I in PBS for 30 min at 37C to degrade collagen surrounding breast cancer cells. This is probably a little high just to dissociate spheroids, but your best bet is to try different concentrations. Also, you might consider trypsin digestion, especially if the cells don't have a lot of collagen. Hope that helps.
Simona Mura Hi Simona, I realise this question was raised a few years ago now, but I am doing a very similar technique and wondered if you have an optimised protocol for this? Which vol/ conc did you end up using for your Pancreatic clusters? Thank you very much!