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- W2014990112 abstract "Macrophage-like cell lines were derived from sheep spleens using conditioned medium from L-929 mouse cells as a source of colony stimulating factor. In seven out of ten attempts colonies of macrophage-like cells appeared after 2–3 weeks of culture. The cells were established in culture as cell lines, and survived 120 passages. They were strongly (++) positive for non-specific esterase but negative for peroxidase and produced detectable but small amounts of lysozyme (0.21–1.76 µg/106 cells). Latex particles were actively phagocytosed. Bacteria (Staphylococcus albus, Staphylococcus aureus) attached to the cell surface and were internalized in the presence of specific antibody. Expression of receptors for immunoglobulin and complement varied somewhat between the different cell lines; the proportion of receptor-bearing cells ranged between 9 and 26% FC-receptors, and 10 and 38% for C-receptors. The cell lines displayed a peculiar karyotype as well as protein profile that were different from normal sheep but similar between the different cell lines. Culture supernatants of the cell lines contained a colony stimulating activity which was used to establish further cell lines. They also spontaneously produced an interleukin-1-like activity that had no effect on baseline proliferation of sheep lymphocytes but enhanced their response to PHA (1.7-fold) particularly in conjunction with sheep IL-2 (4-fold). Prostaglandin E2 was produced in a growth-cycle dependent manner: the peak production occured on the second day (77–140 pg/ml) at 2 × 105 cells and declined to 33–50 pg/ml on the eighth day when cell numbers had increased to 2–3 × 10106. These easily cultured cell lines derived from normal tissue without the introduction of viral DNA should provide a useful source of material for studies of macrophage function in sheep." @default.
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- W2014990112 date "1991-12-01" @default.
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- W2014990112 title "The characteristics of macrophage-like cell lines derived from normal sheep spleens" @default.
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- W2014990112 doi "https://doi.org/10.1111/j.1574-6968.1991.tb04966.x" @default.
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