Bcl-2 over-expression reduced the serum dependency and improved the nutrient metabolism in a NS0 cells culture

Beng Ti Tey, Mohamed Al-Rubeai

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)


The over-expression of Bcl-2 has greatly improved the culture period, specific growth rate, and maximum viable cell density of NSO cells culture under low serum condition. Further analysis of these data suggests that a saturation model of the Monod type can be used to represent the relationships of specific growth rate and initial serum concentration. The μmax and Ks for the Bcl-2 cell line is 0.927 day-1 and 0.947% (v/v) respectively, which are 21% greater and 7% lower respectively than its control counterpart. Study on the amino acid supplementation revealed that Bcl-2 cell lines possess greater improvement in the specific growth rate and maximum viable cell density compared to the control cell lines. A further increase in the amino acid supplementation has resulted a 17% decrease in specific growth rate and no improvement in maximum viable cell density in the control culture. However, the Bcl-2 cell line exhibited a better growth characteristic in this culture condition compared to that of control cell lines. The higher specific growth rate and maximum viable cell density of the Bcl-2 cell line in medium fortified with serum and MEM EAA suggested a more efficient nutrient metabolism compared to that in the control cell line. The low serum and amino acid utilisation rate and the higher cell yield may prove to be important in the development of serum/protein free culture.

Original languageEnglish
Pages (from-to)254-261
Number of pages8
JournalBiotechnology and Bioprocess Engineering
Issue number3
Publication statusPublished - 2005
Externally publishedYes


  • Apoptosis
  • Bcl-2
  • Essential amino acid
  • NS0 cells
  • Serum
  • Specific growth rate

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