title: Antigen-specific cytolysis by neutrophils and NK cells expressing chimeric immune receptors bearing zeta or gamma signaling domains.
abstract: TCR- and IgG-binding Fc receptors (Fc gamma R) mediate a variety of critical biologic activities including cytolysis via the structurally related zeta- and gamma-chains. In previous studies, we have described chimeric immune receptors (CIR) in which the ligand-binding domain of a heterologous receptor or Ab is fused directly to the cytoplasmic domain of the TCR zeta-chain. Such zeta-CIRs efficiently trigger cytotoxic function of both T and NK cells in a target-specific manner. In this report, we compared the ability of both zeta- and gamma-CIRs to activate the cytolytic function of two distinct classes of Fc gamma R-bearing effectors, NK cells and neutrophils. Mature neutrophils expressing zeta- and gamma-CIR were generated in vivo from murine hemopoietic stem cells following transplantation of syngeneic mice with retrovirally transduced bone marrow or in vitro from transduced human CD34+ progenitors following differentiation. Both zeta- and gamma-based CIRs were capable of activating target-specific cytolysis by both NK cells and neutrophils, although the zeta-CIR was consistently more efficient. The experimental approach described is a powerful one with which to study the role of nonlymphoid effector cells in the host immune system and permits the rational design of immunotherapeutic strategies that rely on harnessing multiple immune cell functions via CIR-modified hemopoietic stem cells or progenitors.
authors.affiliation: Cell Genesys Inc., Foster City, CA 94404, USA. margor@cellgenesys.com
authors.forename: M R
authors.initials: MR
authors.lastname: Roberts
authors.forename: K S
authors.initials: KS
authors.lastname: Cooke
authors.forename: A C
authors.initials: AC
authors.lastname: Tran
authors.forename: K A
authors.initials: KA
authors.lastname: Smith
authors.forename: W Y
authors.initials: WY
authors.lastname: Lin
authors.forename: M
authors.initials: M
authors.lastname: Wang
authors.forename: T J
authors.initials: TJ
authors.lastname: Dull
authors.forename: D
authors.initials: D
authors.lastname: Farson
authors.forename: K M
authors.initials: KM
authors.lastname: Zsebo
authors.forename: M H
authors.initials: MH
authors.lastname: Finer
mesh_terms: D000328:Adult; D000818:Animals; D001854:Bone Marrow Cells / Q000276:immunology / Q000378:metabolism; D016026:Bone Marrow Transplantation / Q000276:immunology; D002454:Cell Differentiation / Q000235:genetics / Q000276:immunology; D003601:Cytotoxicity Tests, Immunologic; D003602:Cytotoxicity, Immunologic / Q000276:immunology*; D018984:Epitopes, T-Lymphocyte / Q000276:immunology; D005260:Female; D005822:Genetic Vectors / Q000138:chemical synthesis; D006801:Humans; D007694:Killer Cells, Natural / Q000276:immunology* / Q000378:metabolism; D008297:Male; D008565:Membrane Proteins / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D051379:Mice; D016513:Mice, SCID; D008979:Moloney murine leukemia virus / Q000235:genetics / Q000276:immunology; D009504:Neutrophils / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D017434:Protein Structure, Tertiary; D011948:Receptors, Antigen, T-Cell / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology*; D015398:Signal Transduction / Q000235:genetics / Q000276:immunology*; D014161:Transduction, Genetic / Q000276:immunology
chemical_list: D018984:Epitopes, T-Lymphocyte; D008565:Membrane Proteins; D011948:Receptors, Antigen, T-Cell; D016692:Receptors, Antigen, T-Cell, gamma-delta; D011993:Recombinant Fusion Proteins; C054979:antigen T cell receptor, zeta chain