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  • Title: Production of hematopoietic regulatory factors in cultures of adult and fetal mouse organs: measurement by specific bioassays.
    Author: Metcalf D, Willson TA, Hilton DJ, Di Rago L, Mifsud S.
    Journal: Leukemia; 1995 Sep; 9(9):1556-64. PubMed ID: 7544853.
    Abstract:
    Factor-specific cell line bioassays were used to monitor the production in vitro by adult and fetal mouse organs of GM-CSF, G-CSF, M-CSF, Multi-CSF (IL-3), IL-6 and leukemia inhibitory factor (LIF). No tissue was observed to produce Multi-CSF. Highest producers of the other regulators were lung, muscle, thymus, heart and bone shaft and all tissues producing detectable growth factors produced all five with the same rank order of activity. Adult tissues produced more GM-CSF than G-CSF and less M-CSF than either, no differences being observed between male, female and pregnant female tissues. In contrast, the pregnant uterus produced high levels of M-CSF as did the fetal membranes and tissues with only low GM-CSF and no G-CSF production. Pre-irradiation did not alter the pattern of regulator production by adult tissues. The intravenous injection of endotoxin elevated serum levels of GM-CSF, G-CSF, M-CSF and IL-6 but the dominant rise was in G-CSF levels. The data indicating that multiple organs produce the regulators monitored in a common rank order suggest some overall linkage in their production with major differences between adult and fetal tissues.
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