title: Responsiveness to humoral factors of mouse marrow colony forming cells after treatment with cyclophosphamide.
abstract: Humoral factors affecting granulopoiesis have been detected by culturing bone marrow cells in intraperitoneal diffusion chambers. This study investigated the possibility that treatment with drugs alters the ability of cells to respond to these factors. Three days after treatment with 200 mg kg-1 cyclophosphamide, donor marrow cells were more responsive than normal cells to the factors produced in cyclophosphamide pretreated hosts. The optimum timing of host pretreatment for maximum colony stimulation also differed for cells from cyclophosphamide treated and untreated donors and these effects were found to depend on the dose of drug given to the animals.
mesh_terms: D000818:Animals; D001853:Bone Marrow / Q000378:metabolism*; D001854:Bone Marrow Cells; D016026:Bone Marrow Transplantation; D002454:Cell Differentiation / Q000187:drug effects*; D002478:Cells, Cultured; D003520:Cyclophosphamide / Q000494:pharmacology*; D004058:Diffusion; D004305:Dose-Response Relationship, Drug; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D010529:Peritoneal Cavity / Q000378:metabolism; D013997:Time Factors
chemical_list: D003520:Cyclophosphamide