title: Forward RNAi screens in primary human hematopoietic stem/progenitor cells.
abstract: The mechanisms regulating key fate decisions such as self-renewal and differentiation in hematopoietic stem and progenitor cells (HSPC) remain poorly understood. We report here a screening strategy developed to assess modulators of human hematopoiesis using a lentiviral short hairpin RNA (shRNA) library transduced into cord blood-derived stem/progenitor cells. To screen for modifiers of self-renewal/differentiation, we used the limited persistence of HSPCs under ex vivo culture conditions as a baseline for functional selection of shRNAs conferring enhanced maintenance or expansion of the stem/progenitor potential. This approach enables complex, pooled screens in large numbers of cells. Functional selection identified novel specific gene targets (exostoses 1) or shRNA constructs capable of altering human hematopoietic progenitor differentiation or stem cell expansion, respectively, thereby demonstrating the potential of this forward screening approach in primary human stem cell populations.
authors.affiliation: Center for Regenerative Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
authors.forename: Nicole
authors.initials: N
authors.lastname: Ali
authors.forename: Christine
authors.initials: C
authors.lastname: Karlsson
authors.forename: Marie
authors.initials: M
authors.lastname: Aspling
authors.forename: Guang
authors.initials: G
authors.lastname: Hu
authors.forename: Nir
authors.initials: N
authors.lastname: Hacohen
authors.forename: David T
authors.initials: DT
authors.lastname: Scadden
authors.forename: Jonas
authors.initials: J
authors.lastname: Larsson
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000502:physiology*; D002460:Cell Line; D005312:Fetal Blood / Q000166:cytology / Q000378:metabolism*; D006410:Hematopoiesis / Q000502:physiology*; D018380:Hematopoietic Stem Cell Transplantation; D006412:Hematopoietic Stem Cells / Q000166:cytology / Q000378:metabolism*; D006801:Humans; D016086:Lentivirus; D051379:Mice; D016688:Mice, Inbred NOD; D016513:Mice, SCID; D034741:RNA, Small Interfering / Q000235:genetics / Q000378:metabolism*; D014161:Transduction, Genetic / Q000379:methods; D014183:Transplantation, Heterologous
chemical_list: D034741:RNA, Small Interfering