The generation of desired cell types for therapeutic purposes is becoming a reality with the development of methods for deriving such cells from embryonic stem cells (ESC), induced pluripotent stem cells (iPSC), as well as from isolated adult stem/progenitor cells or differentiated cells that are directly """"""""reprogrammed"""""""" into lineage-specific stem/progenitor cells. Realizing this goal, however, will require methods for deriving therapeutically useful numbers of cells that avoid inducing permanent genetic alterations, and ensure the behavioral fidelity of derived lineage-committed stem/progenitor cells. To address this issue, we propose to test our hypotheses that pathways regulating normal development can be manipulated to direct differentiation and expansion of populations of cell types that reflect normal developmental states. As a model for this approach, we focus on the Notch and Wnt pathways and the well-characterized hematopoietic system to generate hematopoietic stem cells (HSC). The feasibility of expanding therapeutically useful stem/progenitor cells is demonstrated by our expansion of cord blood-derived stem/progenitor cells and by our successful application of these cells in a clinical setting. Specifically, we will examine the requirement for and timing of Notch and Wnt signaling in generating the first HSCs in the embryo, to guide our efforts to produce these cells ex vivo. We will generate ES- and iPS-derived HSC by enhancing differentiation towards hemogenic endothelial precursors of definitive hematopoietic stem/progenitor cells, and by promoting selfrenewal of these multipotent stem/progenitor populations (Project 1). To assess the therapeutic usefulness of human ES- and iPS-derived stem/progenitor cells, we will determine their preservation of the transcriptional, chromatin and DNA methylation and functional landscapes (Project 2). These studies will interface with those described in the collaborative linked application on the role of Wnt and Notch in expansion and proper differentiation of cardiac stem cells.

National Institute of Health (NIH)
National Heart, Lung, and Blood Institute (NHLBI)
Research Project--Cooperative Agreements (U01)
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Special Emphasis Panel (ZHL1-CSR-J (S1))
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Welniak, Lisbeth A
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Fred Hutchinson Cancer Research Center
United States
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Hadland, Brandon; Yoshimoto, Momoko (2018) Many layers of embryonic hematopoiesis: new insights into B-cell ontogeny and the origin of hematopoietic stem cells. Exp Hematol 60:1-9
Hadland, Brandon K; Varnum-Finney, Barbara; Nourigat-Mckay, Cynthia et al. (2018) Clonal Analysis of Embryonic Hematopoietic Stem Cell Precursors Using Single Cell Index Sorting Combined with Endothelial Cell Niche Co-culture. J Vis Exp :
Rabinowitz, Jeremy S; Robitaille, Aaron M; Wang, Yuliang et al. (2017) Transcriptomic, proteomic, and metabolomic landscape of positional memory in the caudal fin of zebrafish. Proc Natl Acad Sci U S A 114:E717-E726
Palpant, Nathan J; Wang, Yuliang; Hadland, Brandon et al. (2017) Chromatin and Transcriptional Analysis of Mesoderm Progenitor Cells Identifies HOPX as a Regulator of Primitive Hematopoiesis. Cell Rep 20:1597-1608
Palpant, Nathan J; Pabon, Lil; Friedman, Clayton E et al. (2017) Generating high-purity cardiac and endothelial derivatives from patterned mesoderm using human pluripotent stem cells. Nat Protoc 12:15-31
Ganuza, Miguel; Hadland, Brandon; Chabot, Ashley et al. (2017) Murine hemogenic endothelial precursors display heterogeneous hematopoietic potential ex vivo. Exp Hematol 51:25-35.e6
Hadland, Brandon K; Varnum-Finney, Barbara; Mandal, Pankaj K et al. (2017) A Common Origin for B-1a and B-2 Lymphocytes in Clonal Pre- Hematopoietic Stem Cells. Stem Cell Reports 8:1563-1572
Xu, Zhuojin; Robitaille, Aaron M; Berndt, Jason D et al. (2016) Wnt/?-catenin signaling promotes self-renewal and inhibits the primed state transition in naïve human embryonic stem cells. Proc Natl Acad Sci U S A 113:E6382-E6390
Li, Li B; Ma, Chao; Awong, Geneve et al. (2016) Silent IL2RG Gene Editing in Human Pluripotent Stem Cells. Mol Ther 24:582-91
Lu, Yi-Fen; Cahan, Patrick; Ross, Samantha et al. (2016) Engineered Murine HSCs Reconstitute Multi-lineage Hematopoiesis and Adaptive Immunity. Cell Rep 17:3178-3192

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