title: HOXB4-transduced embryonic stem cell-derived Lin-c-kit+ and Lin-Sca-1+ hematopoietic progenitors express H60 and are targeted by NK cells.
abstract: Embryonic stem (ES) cells are a novel source of cells, especially hematopoietic progenitor cells that can be used to treat degenerative diseases in humans. However, there is a need to determine how ES cell-derived progenitors are regulated by both the adaptive and innate immune systems post transplantation. In this study, we demonstrate that hematopoietic progenitor cells (HPCs) derived from mouse ES cells ectopically expressing HOXB4 fail to engraft long-term in the presence of NK cells. In particular, the H60-expressing Lin(-)c-kit(+) and Lin(-)Sca-1(+) subpopulations were preferentially deleted in Rag2(-/-), but not in Rag2(-/-)gamma(c)(-/-) mice. Up-regulation of class I expression on HPCs prevented their lysis by NK cells, and Ab-mediated depletion of NK cells restored long-term HPC engraftment. In contrast to the notion that ES-derived cells are immune-privileged, we show in this study that NK cells form a formidable barrier to the long-term engraftment of ES cell-derived hematopoietic progenitors.
authors.affiliation: Medical Scientist Training Program and Immunology Graduate Program, University of Iowa, Iowa City, Iowa 52242, USA.
authors.forename: William B
authors.initials: WB
authors.lastname: Tabayoyong
authors.forename: Juan G
authors.initials: JG
authors.lastname: Salas
authors.forename: Sabrina
authors.initials: S
authors.lastname: Bonde
authors.forename: Nicholas
authors.initials: N
authors.lastname: Zavazava
mesh_terms: D000818:Animals; D000943:Antigens, Differentiation / Q000096:biosynthesis*; D019070:Cell Lineage / Q000276:immunology; D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic / Q000276:immunology*; D053595:Embryonic Stem Cells / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D018380:Hematopoietic Stem Cell Transplantation / Q000379:methods; D018398:Homeodomain Proteins / Q000235:genetics* / Q000276:immunology; D006801:Humans; D007694:Killer Cells, Natural / Q000276:immunology*; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D015778:Minor Histocompatibility Antigens / Q000096:biosynthesis*; D019009:Proto-Oncogene Proteins c-kit / Q000096:biosynthesis*; D014157:Transcription Factors / Q000235:genetics* / Q000276:immunology; D014161:Transduction, Genetic
chemical_list: D000943:Antigens, Differentiation; C090460:HOXB4 protein, human; D018398:Homeodomain Proteins; D015778:Minor Histocompatibility Antigens; D014157:Transcription Factors; C114735:minor H antigen H60; C047076:senescent cell differentiation antigen; D019009:Proto-Oncogene Proteins c-kit