AMJ2-C8 (ATCC CRL-2455) and AMJ2-C11 (ATCC CRL-2456) are cloned, continuous, alveolar macrophage (AM) cell lines generated from C57BL6J mice by in vitro infection with the J2 retrovirus carrying the v-raf and v-myc oncogenes.
Flow cytometry detected the product of the raf gene in the cytoplasm of these cell lines.
Studies on the tumoricidal properties of these cell lines demonstrated differences in their response to a panel of known macrophage activators.
AMJ2-C8 was activated following exposure to recombinant murine interferon gamma (rMuIFN-gamma) but not lipopolysaccharide (LPS) or muramyl dipeptide (MDP).
AMJ2-C11 most closely resembled the response pattern of the parental AM, since it could be activated by either the combination of rMuIFN-gamma plus LPS or rMuIFN-gamma plus MDP.
The cells retain many characteristics of alveolar macrophages. They are phagocytic, non-specific esterase positive and they express macrophage Mac-1 antigens and Fc receptors.
Constitutive expression of MHC-class-II antigens was low on AMJ2-C11 but was increased following exposure to rMuIFN-gamma.
The cell line did not secrete substantial amounts of IL-1 or TNF but did secrete large amounts of IL-6.
The cells produce nitric oxide (NO) when stimulated with a mixture of rMuIFN-gamma and LPS.
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