Abstract: Provided herein are methods for increasing the number of hematopoietic stem and progenitor cells (HSPCs) in vivo or in vitro. The methods can include the steps of selecting a subject in need of an increased number of HSPCs and administering to the subject an effective amount of an inhibitor of VEGF to increase the number of HSPCs in the subject. Optionally, the methods include the steps of contacting a population of HSPCs and supporting cells with an inhibitor of VEGF, and contacting the population of HSPCs and supporting cells with a parathyroid hormone (PTH) receptor agonist. Also provided is a method for increasing the number of hematopoietic stem and progenitor cells (HSPCs) in a subject including the steps of administering to the subject an inhibitor of VEGF, and administering to the subject a parathyroid hormone (PTH) receptor agonist. The method is optionally used in a subject or for a with decreased osteogenesis, including, for example, when the subject has a bone fracture or has osteoporosis.

Abstract: The invention relates to methods for manipulating hematopoietic stem or progenitor cells, mesenchymal stem cells, epithelial stem cells, neural stem cells and related products through activation of the PTH/PTHrP receptor in neighboring cells.

Abstract: The present invention relates to the discovery that CCL3, through at least one of its receptors CCR1 and CCR5, plays a role in the pathologies associated with myeloid neoplasms. In various embodiments, the pathologies associated with myeloid neoplasms treatable by the compositions and methods of the invention described herein include, but are not limited to, at least one of osteoclast/osteoblast imbalance, inhibition of osteoblast function, bone loss, disregulation of the hematopoietic stem cell microenvironment, abnormal hematopoietic recovery, pancytopenia, anemia, thrombocytopenia, neutropenia, bicytopenia, and erythrocytopenia. Interfering with the interaction between CCL3 and its receptors, by targeting at least one of CCL3, CCR1, CCR5, diminishes the effects of pathologies associated with myeloid neoplasms.

Abstract: The invention relates to methods for manipulating hematopoietic stem or progenitor cells, mesenchymal stem cells, epithelial stem cells, neural stem cells and related products through activation of the PTH/PTHrP receptor in neighboring cells.

Abstract: The invention relates to methods for manipulating hematopoietic stem or progenitor cells, mesenchymal stem cells, epithelial stem cells, neural stem cells and related products through activation of the PTH/PTHrP receptor in neighboring cells.

Abstract: The invention relates to methods for manipulating hematopoietic stem or progenitor cells, mesenchymal stem cells, epithelial stem cells, neural stem cells and related products through activation of the PTH/PTHrP receptor in neighboring cells.

Abstract: The invention relates to methods for manipulating hematopoietic progenitor cells and related products. In one aspect the invention relates to the use of agents that activate a PTH/PTHrP receptor to enhance the growth and maintenance of hematopoietic progenitor cells in vivo and in vitro, to enhance mobilization of hematopoietic stem cells, to improve the efficiency of targeting cells to the bone marrow, and/or to modulate hematopoietic progenitor cell function.

Abstract: The invention relates to methods for manipulating hematopoietic stem or progenitor cells, mesenchymal stem cells, epithelial stem cells, neural stem cells and related products through activation of the PTH/PTHrP receptor in neighboring cells.

Abstract: The invention relates to methods for manipulating hematopoietic stem or progenitor cells, mesenchymal stem cells, epithelial stem cells, neural stem cells and related products through activation of the PTH/PTHrP receptor in neighboring cells.

Abstract: The invention relates to methods for manipulating hematopoietic progenitor cells and related products In one aspect the invention relates to the use of agents that activate a PTH/PTHrP receptor to enhance the growth and maintenance of hematopoietic progenitor cells in vivo and in vitro, to enhance mobilization of hematopoietic stem cells, to improve the efficiency of targeting cells to the bone marrow, and/or to modulate hematopoietic progenitor cell function.

Abstract: The invention relates to methods for manipulating hematopoietic progenitor cells and related products. In one aspect the invention relates to the use of agents that activate a PTH/PTHrP receptor to enhance the growth and maintenance of hematopoietic progenitor cells in vivo and in vitro, to enhance mobilization of hematopoietic stem cells, to improve the efficiency of targeting cells to the bone marrow, and/or to modulate hematopoietic progenitor cell function.