Abstract: Forced expression of a handful of transcription factors (TFs) can induce conversion between cell identities; however, the extent to which TFs can alter cell identity has not been systematic ally assessed. Here, we assembled a “human TFome,” a comprehensive expression library of 1,578 human TF clones with fall coverage of the major TF families. By systematically screening the human TFome, we identified many individual TFs that induce loss of human-induced-pluripotent-stem-cell (hiPSC) identity, suggesting a pervasive ability for TFs to alter cell identity. Using large-scale computational cell type classification trained on thousands of tissue expression pantiles, we identified cell types generated by these TFs with high efficiency and speed, without additional selections or mechanical perturbations. TF expression in adult human tissues only correlated with some of the cell lineage generated, suggesting more complexity than observation studies can explain.

Abstract: Forced expression of a handful of transcription factors (TFs) can induce conversions between cell identities; however, the extent to which TFs can alter cell identity has not been systematically assessed. Here, we assembled a human TFome, a comprehensive expression library of 1,578 human TF clones with full coverage of the major TF families. By systematically screening the human TFome, we identified 77 individual TFs that induce loss of human-induced-pluripotent-stem-cell (hiPSC) identity, suggesting a pervasive ability for TFs to alter cell identity. Using large-scale computational cell type classification trained on thousands of tissue expression profiles, we identified cell types generated by these TFs with high efficiency and speed, without additional selections or mechanical perturbations. TF expression in adult human tissues only correlated with some of the cell lineage generated, suggesting more complexity than observation studies can explain.

Abstract: Provided herein, in some embodiments, are methods and compositions for identifying combinations of transcription factors, for example, those involved in cell type conversion processes, such as cell differentiation.

Abstract: Provided herein is a differentiation agent that consist essentially of SOX9 for the production of oligodendrocyte progenitor cells (OPCs) from pluripotent stem cells (PSCs). Also provided herein are methods of producing the PSCs and methods of using the PSCs to produce OPCs and oligodendrocytes.

Abstract: Provided herein are pluripotent stem cells comprising particular combinations of transcription factor for the production of oligodendrocyte progenitor cells (OPCs). Also provided herein are methods of producing the pluripotent stem cells and methods of using the pluripotent stem cells to produce (OPCs) and oligodendrocytes.

Abstract: Provided herein, in some embodiments, are methods and compositions for identifying combinations of transcription factors, for example, those involved in cell type conversion processes, such as cell differentiation.

Abstract: Forced expression of a handful of transcription factors (TFs) can induce conversions between cell identities; however, the extent to which TFs can alter cell identity has not been systematically assessed. Here, we assembled a “human TFome,” a comprehensive expression library of 1,578 human TF clones with full coverage of the major TF families. By systematically screening the human TFome, we identified many individual TFs that induce loss of human-induced-pluripotent-stem-cell (hiPSC) identity, suggesting a pervasive ability for TFs to alter cell identity. Using large-scale computational cell type classification trained on thousands of tissue expression profiles, we identified cell types generated by these TFs with high efficiency and speed, without additional selections or mechanical perturbations. TF expression in adult human tissues only correlated with some of the cell lineage generated, suggesting more complexity than observation studies can explain.