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Trypsin free detachment?? - (Sep/13/2004 )


Am culturing HK-2 cells and am trying to detach them without using trypsin as it'll cleave a cell surface protein I want to look at by flow cytometry. Any ideas? I've tried using various concentrations of EDTA in PBS...the cells round up but won't come off. Am I not using a high enough concentration (I've tried 50mM) or am I just not leaving it on long enough. Any help GREATLY appreciated!


Maybe you could try the Cell Disociation buffers offered by Gibco/Invitrogen.
They did not work much better than EDTA for me but they may on your cell line.
For how long are you incubating with EDTA? If it's a hearty cell they can take long exposures without dying. Do you try to actively wash them off the plate using a smaller bore pipette? I have not use HK-2 cell before, they may be like MDCKs which HATE to come off the plate w/o trypsin.

Good luck!



There are temperature sensitive surfaces for cell culture. Keep cells cultured on temp sensitive surface at room temp for a few minutes and cells are detached as sheets.

Amazing isnt it

Try search on PIPAAm grafted surfaces for cell culture