CD34 selection and DNAse

From: Peter Chapple (peterc@petermac.unimelb.edu.au)
Date: Mon Oct 20 1997 - 02:17:12 EST


Dear Group,

I have occasionally recovered archival PB CD34 cells from the freezer to use in some
CD34 selection/expansion experiments. The usual cell clumping problems are always
present and contribute to very high cell losses ( ... cest la vive).

I have been thinking about including some DNAse into my thawing buffer to try and minimise
this problem (I am assuming that free DNA from disintegrated cells is the major culprit
in the whole process). Has anyone in the group tried this ??? what final concentration of
DNAse should I aim at ??

Thanks in advance

Peter Chapple
Melbourne AUSTRALIA



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