Abstract
A mouse IL 3-dependent cell line, FD.C/1, can be induced to IL 2 growth responsiveness by culture in IL 2-conditioned culture medium. The IL 2-dependent cell lines derived by this procedure have been designated FD.C/2 cells. Once established, the FD.C/2 cells respond to human, rat, and mouse IL 2. When cultured with murine IL 3, FD.C/2 cells did not proliferate, appearing to accumulate in the G1 phase of the cell cycle. Other human and mouse lymphokines failed to stimulate FD.C/2 cell growth. The growth dependence of FD.C/2 cells on IL 2 could not be reversed to IL 3. Cell lines derived by these procedures could provide in vitro models for hemopoietic differentiative events.
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