title: Histone demethylase KDM2B regulates lineage commitment in normal and malignant hematopoiesis.
abstract: The development of the hematopoietic system is a dynamic process that is controlled by the interplay between transcriptional and epigenetic networks to determine cellular identity. These networks are critical for lineage specification and are frequently dysregulated in leukemias. Here, we identified histone demethylase KDM2B as a critical regulator of definitive hematopoiesis and lineage commitment of murine hematopoietic stem and progenitor cells (HSPCs). RNA sequencing of Kdm2b-null HSPCs and genome-wide ChIP studies in human leukemias revealed that KDM2B cooperates with polycomb and trithorax complexes to regulate differentiation, lineage choice, cytokine signaling, and cell cycle. Furthermore, we demonstrated that KDM2B exhibits a dichotomous role in hematopoietic malignancies. Specifically, we determined that KDM2B maintains lymphoid leukemias, but restrains RAS-driven myeloid transformation. Our study reveals that KDM2B is an important mediator of hematopoietic cell development and has opposing roles in tumor progression that are dependent on cellular context.
authors.forename: Jaclyn
authors.initials: J
authors.lastname: Andricovich
authors.forename: Yan
authors.initials: Y
authors.lastname: Kai
authors.forename: Weiqun
authors.initials: W
authors.lastname: Peng
authors.forename: Adlen
authors.initials: A
authors.lastname: Foudi
authors.forename: Alexandros
authors.initials: A
authors.lastname: Tzatsos
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D045744:Cell Line, Tumor; D019070:Cell Lineage; D002471:Cell Transformation, Neoplastic; D044783:F-Box Proteins / Q000502:physiology*; D015973:Gene Expression Regulation, Leukemic; D006410:Hematopoiesis; D006801:Humans; D056484:Jumonji Domain-Containing Histone Demethylases / Q000502:physiology*; D008223:Lymphoma / Q000201:enzymology* / Q000473:pathology; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D016283:Proto-Oncogene Proteins p21(ras) / Q000235:genetics
chemical_list: D044783:F-Box Proteins; C117307:KRAS protein, human; D056484:Jumonji Domain-Containing Histone Demethylases; C534524:KDM2A protein, human; D016283:Proto-Oncogene Proteins p21(ras)