Dear all,
We have primary myeloma cells in RPMI + 20% FCS and we are trying to establish a cell line from it. Cells proliferate but viability is quite low (~40%), for this reason we have tried to add different concentrations of IL-6 and other growth factors. Also we tried different cell densities. Waste cell products seems to be quite high. Do you have any advice on how to improve viability of primary myeloma cells?