title: Use of natural killer cells as immunotherapy for leukaemia.
abstract: Natural killer (NK) cells potentially play a significant role in eradicating residual disease following allogeneic haematopoietic cell transplantation, and have been explored as tools for adoptive immunotherapy for chemotherapy-refractory patients. NK cell cytotoxicity is modulated by multiple activating and inhibitory receptors that maintain a balance between self-tolerance and providing surveillance against pathogens and malignant transformation. The functional characteristics of NK cells are dictated by the strength of inhibitory receptor signalling. Major histocompatibility complex (MHC)-specific inhibitory receptor acquisition occurs sequentially during NK cell development, and is determined by the nature of immunological reconstitution after allogeneic haematopoietic cell transplantation. Polymorphisms of inhibitory receptors [killer immunoglobulin-like receptors (KIRs)] and their ligands (MHC) contribute to interindividual variability. As a result, the functional NK cell repertoire of individual donors has variable potential for graft-vs-leukaemia reactions. Models predicting NK cell alloreactivity, including KIR ligand mismatch and missing KIR ligand strategies, are discussed as algorithms for optimal NK cell donor selection. Future modifications to improve NK cell adoptive immunotherapy by means of increasing target recognition and reducing inhibitory signalling are being explored.
authors.affiliation: Division of Blood and Marrow Transplantation, University of Minnesota, MN, USA.
authors.forename: Bartosz
authors.initials: B
authors.lastname: Grzywacz
authors.forename: Jeffrey S
authors.initials: JS
authors.lastname: Miller
authors.forename: Michael R
authors.initials: MR
authors.lastname: Verneris
mesh_terms: D019264:Adoptive Transfer; D015703:Antigens, CD / Q000235:genetics; D006087:Graft vs Host Reaction; D006801:Humans; D007167:Immunotherapy / Q000379:methods*; D007694:Killer Cells, Natural / Q000276:immunology / Q000637:transplantation*; D007938:Leukemia / Q000276:immunology* / Q000628:therapy; D008285:Major Histocompatibility Complex; D011110:Polymorphism, Genetic; D017634:Self Tolerance / Q000276:immunology; D014184:Transplantation, Homologous / Q000276:immunology
chemical_list: D015703:Antigens, CD
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