Abstract
A recombinant CHO cell line (GT19) secreting a high level of human growth hormone (hGH) was constructed with amplification of the introduced hGH gene. The cells grew well in the alpha MEM medium supplemented with 5% dialyzed fetal calf serum (dFCS), but not with less than 1% dFCS. Therefore we examined various medium components and obtained an improved medium which supported cell growth at low serum concentrations. The production of hGH by the cells was also enhanced in this medium.
Similar content being viewed by others
Abbreviations
- CHO:
-
Chinese hamster ovary
- hGH:
-
human growth hormone
- dFCS:
-
dialyzed fetal calf serum
- dhfr:
-
dihydroforate reductase
- MTX:
-
methotrexate
References
Ayusawa, D, Iwata, K and Seno, T (1981) Conditional thymidine auxotrophic mutants of mouse FM3A cells due to thermosensitive thymidylate synthase and their prototrophic revertants. J. Biol. Chem. 256: 12005–12012.
Friedman, JS, Cofer, CL, Anderson, CL, Kushner, JA, Gray, PP, Chapman, GE, Stuart, MC, Lazarus, L, Shine, J and Kushner, PJ (1989) High expression in mammalian cells without amplification. Bio/Technology 7: 359–362.
Gasser, F, Mulsant, P and Gillois, M (1985) Long-term multiplication of the Chinese hamster ovary (CHO) cell line in a serum-free medium. In Vitro 21: 588–592.
Hamilton, WG and Ham, RG (1977) Clonal growth of Chinese hamster cell lines in protein-free media. In Vitro 13: 537–547.
Israel, DI and Kaufman, RJ (1989) Highly inducible expression from vectors containing multiple GREs in CHO cells overexpressing the glucocorticoid receptor. Nucleic Acids Res. 17: 4589–4604.
Kan, M and Yamane, I (1982) Effects of sulfhydryl groups and tension on the cell proliferating activity of bovine serum albumin in culture. Cell Struct. Func. 7: 133–143.
Kao, F-T and Puck, TT (1968) Genetics of somatic mammalian cells. IV. Properties of Chinese hamster cell mutants with respect to the requirement for proline. Proc. Natl. Acad. Sci. USA 60: 1275–1281.
Kaufman, RJ and Sharp, PA (1982) Amplification and expression of sequences co-transfected with a modular dihydrofolate reductase complementary DNA gene. J. Mol. Biol. 159: 601–621.
Mellman, WJ and Cristofalo, VJ (1972) Human diploid cell cultures: their usefulness in the study of genetic variations in metabolism. In: Rothblat, GH and Cristofalo, VJ (ed.) Growth, Nutrition, and Metabolism of Cells in Culture (pp. 327–369). Academic Press, New York.
Potter, H, Weir, L and Leder, P (1984) Proc. Natl. Acad. Sci. USA 81: 7161–7165.
Pouyssegur, J, Willingham, M and Pastan, I (1977) Role of cell surface carbohydrates and proteins in cell behavior: studies on the biochemical reversion of an N-acetylglucosamine-deficient fibroblast mutant. Proc. Natl. Acad. Sci. USA 74: 243–247.
Sano, E, Okano, K, Sawada, R, Naruto, M, Sudo, T, Kamata, K, Iizuka, M and Kobayashi, S (1988) Constitutive long-term production and characterization of recombinant human interferon-gammas from two different mammalian cells. Cell Struct. Func. 13: 143–159.
Selden, RF, Howie, KB, Rowe, ME, Goodman, HM and Moore, DD (1986) Mol. Cell Biol. 6: 3173–3179.
Stanners, CP, Eliceiri, GL and Green, H (1971) Two types of ribosome in mouse-hamster hybrid cells. Nature New Biology 230: 52.
Urlaub, G and Chasin, LA (1980) Isolation of Chinese hamster cell mutants deficient in dihydrofolate reductase activity. Proc. Natl. Acad. Sci. USA 77: 4216–4220.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Hata, Ji., Tamura, T., Yokoshima, S. et al. Chemically defined medium for the production of biologically active substances of CHO cells. Cytotechnology 10, 9–14 (1992). https://doi.org/10.1007/BF00376095
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00376095