title: Differentiation of porcine dendritic cells by granulocyte-macrophage colony-stimulating factor expressed in Pichia pastoris.
abstract: Dendritic cells (DC) are potent inducers of acquired immunity due to their ability to present antigens in the context of a costimulatory environment and consequently serve an essential role in vaccine efficacy. Strategies to enhance their function, such as granulocyte-macrophage colony-stimulating factor (GM-CSF) and IL-4 treatment to induce DC differentiation from peripheral blood monocytes, may therefore be useful as vaccine adjuvants. We now have evaluated the effect of recombinant GM-CSF on the differentiation of DC in swine. GM-CSF mRNA was readily detected in porcine splenocytes, with increased levels following treatment of the cells with ConA and LPS. Porcine GM-CSF was cloned and expressed in the methylotrophic yeast, Pichia pastoris, as a glycosylated protein that induced proliferation of porcine bone marrow cells. P. pastoris-derived GM-CSF induced expression of antigen presenting (MHC class II) and costimulatory (CD80-CD86) molecules and enhanced antigen presenting cell (APC) function consistent with the induction of functional DC. Thus, recombinant GM-CSF produced by P. pastoris may be a potent adjuvant for swine vaccines.
authors.affiliation: Department of Veterinary PathoBiology, University of Minnesota, 1971 Commonwealth Avenue, St Paul, MN 55108, USA.
authors.forename: Dennis L
authors.initials: DL
authors.lastname: Foss
authors.forename: Antoinette M
authors.initials: AM
authors.lastname: Bennaars
authors.forename: Christopher A
authors.initials: CA
authors.lastname: Pennell
authors.forename: Mark D
authors.initials: MD
authors.lastname: Moody
authors.forename: Michael P
authors.initials: MP
authors.lastname: Murtaugh
mesh_terms: D000818:Animals; D017951:Antigen Presentation / Q000187:drug effects; D000954:Antigens, Surface / Q000032:analysis / Q000378:metabolism; D001854:Bone Marrow Cells / Q000166:cytology / Q000187:drug effects; D002454:Cell Differentiation / Q000187:drug effects*; D002455:Cell Division / Q000187:drug effects; D003713:Dendritic Cells / Q000166:cytology* / Q000187:drug effects* / Q000276:immunology; D004306:Dose-Response Relationship, Immunologic; D015870:Gene Expression; D016179:Granulocyte Colony-Stimulating Factor / Q000235:genetics / Q000378:metabolism / Q000494:pharmacology*; D016130:Immunophenotyping; D010843:Pichia / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D011994:Recombinant Proteins; D013552:Swine / Q000276:immunology*
chemical_list: D000954:Antigens, Surface; D012333:RNA, Messenger; D011994:Recombinant Proteins; D016179:Granulocyte Colony-Stimulating Factor