title: Monocytes do not inhibit peripheral blood erythroid burst forming unit colony formation.
abstract: To determine a possible role of peripheral blood monocytes in erythroid differentiation, various fractions of peripheral blood mononuclear cells were prepared from normal volunteers. The fractions contained 3-95% monocytes. These freshly prepared monocytes did not inhibit erythroid burst forming unit expression in plasma clot erythroid colony culture. Null cell preparations contaminated by up to 84% monocytes expressed erythroid burst forming unit colony formation when either T lymphocytes or T-cell conditioned medium was added. These results indicate that certain peripheral blood null cells engage the program of erythroid differentiation in the presence of T cells and erythropoietin. Monocytes do not inhibit this engagement.
mesh_terms: D000328:Adult; D002450:Cell Communication; D003114:Colony-Forming Units Assay; D004920:Erythropoiesis / Q000187:drug effects; D004921:Erythropoietin / Q000494:pharmacology; D006801:Humans; D007376:Interleukin-2 / Q000494:pharmacology; D008297:Male; D008875:Middle Aged; D009000:Monocytes / Q000502:physiology*; D013601:T-Lymphocytes / Q000502:physiology
chemical_list: D007376:Interleukin-2; D004921:Erythropoietin