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. 1999 Sep;31(1-2):77–83. doi: 10.1023/A:1008016020785

Effectiveness of vitamin A acetate for enhancing the production of lung cancer specific monoclonal antibodies

Yuichi Inoue, Mihoko Fujisawa, Seiji Kawamoto, Masahiro Shoji, Shuichi Hashizume, Makoto Fujii, Yoshinori Katakura, Sanetaka Shirahata
PMCID: PMC3449771  PMID: 19003127

Abstract

The antibody productivity of the human–human hybridoma cell line AE6, which produces the lung cancer specific human monoclonal antibody AE6F4, was enhanced fourfold upon stimulation with 1 μg/ml of vitamin A acetate for one day. The enhancement lasted for about two weeks, and could be repeated by another stimulation with vitamin A acetate. The enhancing effect of vitamin A acetate was influenced by the cell density. Enhancement was clearly observed when the cell density was under 106 cells/ml. However, when the cell density was over 107 cells/ml, enhancement was observed weakly or not at all. Although the enhancing effect of vitamin A acetate is not unique to AE6 cells, not all human–human hybridoma cell lines show increased productivity upon VA acetate stimulation. This study suggests that the response to vitamin A acetate may be related to the properties of a particular fusion partner which the hybridoma cell inherits. The efficacy of vitamin A acetate for production of human monoclonal antibodies using human–human hybridomas is discussed.

Keywords: antibody production, human monoclonalantibody, hybridoma, lung cancer, vitamin A acetate

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