title: Synergism of interleukin-12 and interleukin-3 on development of hematopoietic progenitors.
abstract: The recently cloned cytotoxic lymphocyte maturation factor [CLMF] also called NK cell stimulatory factor [NKSF] or interleukin-12 [IL-12] has been described as a growth factor for mature lymphoid cells. The present study investigated whether purified recombinant human IL-12 could stimulate CFU colony growth. Source of progenitor cells were peripheral blood cells depleted of adherent, CD2- and CD56-positive cells. RhIL-12 was investigated either alone or in combination with rhIL-3, rhIL-6 and rhGM-CSF. RhIL-12 alone did not support colony formation of myeloid or erythroid progenitors. RhIL-12 in combination with rhIL-3 increased the numbers of BFU-E and CFU-GM. No synergism or additive effect was seen with the combination of rhIL-12 and rhGM-CSF or rhIL-12 and rhIL-6. An additive increase in the number of granulocytic colonies was observed when rhIL-3, rhIL-6 and rhGM-CSF were used together with rhIL-12. Our results therefore suggest that, in addition to being a potent lymphopoietic stimulator, IL-12 acts synergistically with IL-3 in enhancing the sensitivity of hemopoietic progenitors to IL-3.
authors.affiliation: Laboratoire DIFEMA, Faculté de Médecine et de Pharmacie, Saint Etienne du Rouvray, France.
authors.forename: D
authors.initials: D
authors.lastname: Fardoun-Joalland
authors.forename: G
authors.initials: G
authors.lastname: Teixeira-Lebrun
authors.forename: B
authors.initials: B
authors.lastname: Lenormand
authors.forename: M
authors.initials: M
authors.lastname: Dzondo-Gadet
authors.forename: J P
authors.initials: JP
authors.lastname: Vannier
mesh_terms: D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D015672:Erythroid Precursor Cells / Q000187:drug effects / Q000502:physiology; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000494:pharmacology; D006410:Hematopoiesis / Q000187:drug effects / Q000502:physiology; D006412:Hematopoietic Stem Cells / Q000187:drug effects / Q000502:physiology*; D006801:Humans; D018664:Interleukin-12 / Q000494:pharmacology*; D007377:Interleukin-3 / Q000494:pharmacology*; D015850:Interleukin-6 / Q000494:pharmacology
chemical_list: D007377:Interleukin-3; D015850:Interleukin-6; D018664:Interleukin-12; D016178:Granulocyte-Macrophage Colony-Stimulating Factor