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  • Title: Endotoxin-induced alterations in canine granulopoiesis: colony-stimulating factor, colony-forming cells in culture, and growth of cells in diffusion chambers.
    Author: MacVittie TJ, Walker RI.
    Journal: Exp Hematol; 1978 Aug; 6(7):613-8. PubMed ID: 308464.
    Abstract:
    Salmonella typhosa endotoxin injected into dogs produced elevated plasma CSF levels, transient leukopenia followed by leukocytosis, and stimulation of marrow granulopoiesis and mobilization of granulocyte-macrophage progenitors cells into the the peripheral circulation. The number of marrow CFU-c decreased to 65% of the control number within 6 h, returned to control levels by 24 h, and increased to 370% of the control number by 48h after endotoxin. The granulopoietic response was supported by a concomitant increase in the M:E ratio, an increased fraction of marrow-derived CFU-c susceptible to 3H-TdR suicide, and increased granulo-monocytopoietic activity of marrow- and peripheral blood-derived cells grown in diffusion chamber cultures. These results are consistent with the concept that endotoxin-induced CSF is a physiologic regulator of canine granulopoiesis, and that canine marrow responds to endotoxin with a significant increase in the concentration of marrow-derived granulocytic progenitors and with mobilization of granulocyte-macrophage progenitors into the peripheral circulation.
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