title: A functional screen to identify novel effectors of hematopoietic stem cell activity.
abstract: Despite tremendous progress made toward the identification of the molecular circuitry that governs cell fate in embryonic stem cells, genes controlling this process in the adult hematopoietic stem cell have proven to be more difficult to unmask. We now report the results of a novel gain-of-function screening approach, which identified a series of 18 nuclear factors that affect hematopoietic stem cell activity. Overexpression of ten of these factors resulted in an increased repopulating activity compared to unmanipulated cells. Interestingly, at least four of the 18 factors, Fos, Tcfec, Hmgb1, and Sfpi1, show non-cell-autonomous functions. The utilization of this screening method together with the creation of a database enriched for potential determinants of hematopoietic stem cell self-renewal will serve as a resource to uncover regulatory networks in these cells.
authors.affiliation: Molecular Genetics of Stem Cells Laboratory, Institute of Research in Immunology and Cancer (IRIC), University of Montreal, Montreal, Quebec H3C 3J7, Canada.
authors.forename: Eric
authors.initials: E
authors.lastname: Deneault
authors.forename: Sonia
authors.initials: S
authors.lastname: Cellot
authors.forename: Amélie
authors.initials: A
authors.lastname: Faubert
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Laverdure
authors.forename: Mélanie
authors.initials: M
authors.lastname: Fréchette
authors.forename: Jalila
authors.initials: J
authors.lastname: Chagraoui
authors.forename: Nadine
authors.initials: N
authors.lastname: Mayotte
authors.forename: Martin
authors.initials: M
authors.lastname: Sauvageau
authors.forename: Stephen B
authors.initials: SB
authors.lastname: Ting
authors.forename: Guy
authors.initials: G
authors.lastname: Sauvageau
mesh_terms: D053687:Adult Stem Cells / Q000166:cytology* / Q000378:metabolism; D000818:Animals; D001854:Bone Marrow Cells; D002454:Cell Differentiation; D053263:Gene Regulatory Networks; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000378:metabolism; D006801:Humans; D051379:Mice; D008810:Mice, Inbred C57BL; D041681:NIH 3T3 Cells; D009687:Nuclear Proteins / Q000032:analysis*; D013047:Specific Pathogen-Free Organisms
chemical_list: D009687:Nuclear Proteins