title: Regulation of Hematopoiesis and Hematological Disease by TGF-β Family Signaling Molecules.
abstract: Throughout the lifetime of an individual, hematopoietic stem cells (HSCs) maintain the homeostasis of normal hematopoiesis through the precise generation of mature blood cells. Numerous genetic studies in mice have shown that stem-cell quiescence is critical for sustaining primitive long-term HSCs in vivo. In this review, we first examine the crucial roles of transforming growth factor β (TGF-β) and related signaling molecules in not only regulating the well-known cytostatic effects of these molecules but also governing the self-renewal capacity of HSCs in their in vivo microenvironmental niche. Second, we discuss the current evidence indicating that TGF-β signaling has a dual function in disorders of the hematopoietic system. In particular, we examine the paradox that, although intrinsic TGF-β signaling is essential for regulating the survival and resistance to therapy of chronic myelogenous leukemia (CML) stem cells, genetic changes that abrogate TGF-β signaling can lead to the development of several hematological malignancies.
authors.affiliation: Department of Stem Cell Biology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Minami-ku, Hiroshima 734-8553, Japan.
authors.forename: Kazuhito
authors.initials: K
authors.lastname: Naka
authors.affiliation: Division of Molecular Genetics, Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Hirao
mesh_terms: D019485:Bone Morphogenetic Proteins / Q000378:metabolism / Q000502:physiology; D000066673:Cell Self Renewal; D006402:Hematologic Diseases / Q000378:metabolism*; D006410:Hematopoiesis; D006706:Homeostasis; D006801:Humans; D008958:Models, Molecular; D015398:Signal Transduction; D055153:Stem Cell Niche; D016212:Transforming Growth Factor beta / Q000378:metabolism / Q000502:physiology*
chemical_list: D019485:Bone Morphogenetic Proteins; D016212:Transforming Growth Factor beta