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We examined the responsiveness of two factor-dependent macrophage cell lines, BDM-1 and its subclone, BDM-1W3, to bacterial lipopolysaccharide (LPS), interferon-gamma (IFN-gamma), and tumor necrosis factor-alpha (TNF-alpha) for their growth. LPS inhibited the M-CSF-dependent proliferation of BDM-1 cells but it had no effect on the proliferation of BDM-1W3 cells. LPS promoted DNA synthesis and supported the cell viability in the absence of CSFs in BDM-1 and BDM-1W3 cells, suggesting that the intracellular signals are transduced from the interaction of LPS with LPS-binding sites in BDM-1W3 cells as well as in BDM-1 cells. IFN-gamma inhibited the proliferation of BDM-1 and BDM-1W3 cells. However, BDM-1 cells were more susceptible to the inhibitory effect of IFN-gamma than BDM-1W3 cells. In contrast to LPS and IFN-gamma, TNF-alpha did not inhibit the proliferation of BDM-1 and BDM-1W3 cells. These cell lines should be useful for studying the regulatory mechanisms in CSF-dependent macrophage proliferation.

Differential Effects of Bacterial Lipopolysaccharide and Interferon-.GAMMA. on Proliferation of Two Factor-Dependent Macrophage Cell Lines.