Abstract
A low protein aqueous lipid supplement (Ex-Cyte VLE), in combination with pluronic polyol, is an effective replacement for fetal bovine serum for insect Sf-9 cells. Serum-free medium with lipid supplement and pluronic (SFM-LP) supported higher cell viability and maximum cell populations than serum-supplemented medium. No adaptation procedures are required when switching cells from serum-containing medium to SFM-LP, and growth rates remain constant during continued passages in SFM-LP. The amounts of recombinant proteins produced, which is the major use for the Sf-9 cells, are better or equal in SFM-LP compared to serum-supplemented medium. SFM-LP also supports growth of the TN-368 cell line but IPLB-SF-21AE or IZD-Mb0503 lines grow poorly in this medium.
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