title: Rate of non-adherent cell loss from long-term cultures of murine bone marrow: effect of medium conditioned by the adherent cell population.
abstract: The rate of random spontaneous cell loss from the non-adherent cell population of long-term cultures of murine bone marrow was determined. The measured rate of non-adherent cell loss is affected by previous conditioning of the medium in which the non-adherent cells are suspended. Specifically, the measured rate of non-adherent cell loss is significantly slowed when the non-adherent cells are suspended in medium conditioned in long-term haematopoietic cultures instead of fresh medium. It appears that a subset of the adherent cell population is the source of the factor or factors within the medium which result in this slower measured rate of non-adherent cell loss. This effect may be due to the stimulation to division of haematopoietic progenitor cells, offsetting the lysis of other non-adherent cells.
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells; D002448:Cell Adhesion; D002470:Cell Survival; D002478:Cells, Cultured; D003114:Colony-Forming Units Assay; D046508:Culture Techniques / Q000379:methods; D006098:Granulocytes / Q000166:cytology; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D008264:Macrophages / Q000166:cytology; D051379:Mice; D008815:Mice, Inbred Strains; D013154:Spleen / Q000166:cytology; D013997:Time Factors