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Increased granulopoiesis after sequential administration of transforming growth factor-beta 1 and granulocyte-macrophage colony-stimulating factor. 1993

K Hestdal, and S E Jacobsen, and F W Ruscetti, and D L Longo, and T C Boone, and J R Keller
Preclinical Evaluation Laboratory, Program Resources, Inc./DynCorp, Frederick, MD 21702-1201.

Transforming growth factor-beta 1 (TGF-beta 1) is an inhibitor of the growth and differentiation of immature hematopoietic progenitors in vitro; however, we have demonstrated that TGF-beta 1 can promote granulopoiesis in the presence of granulocyte-macrophage colony-stimulating factor (GM-CSF) in vitro. We therefore examined the effect of the combined administration of TGF-beta 1 and GM-CSF in vivo. First, TGF-beta 1 enhanced the specific binding of GM-CSF (2.0-fold) on bone marrow cells, reaching a maximum 40 hours after injection, while the specific binding of interleukin-3 (IL-3) was unaffected. Using GM-CSF-specific binding to determine the optimal regimen for cytokine administration in vivo, we found that the administration of TGF-beta 1 and GM-CSF in sequence increased myelopoiesis. Total numbers of colony-forming units-granulocyte/macrophage (CFU-GM) and myeloblasts per femur were increased above the level obtained with the simultaneous injection of TGF-beta 1 plus GM-CSF, GM-CSF alone or TGF-beta 1 alone. Further, the sequential administration of TGF-beta 1 and GM-CSF resulted in enhanced numbers of mature granulocytes in both the bone marrow and peripheral blood. In contrast, the sequential combination of TGF-beta 1 and GM-CSF did not enhance the numbers or increase the recovery of erythroid cells in the bone marrow. These results show that TGF-beta 1 in vivo as in vitro has a multifunctional effect on bone marrow progenitors, and by using an optimal combination of TGF-beta 1 and GM-CSF in vivo, one can selectively increase both the central and peripheral granulopoietic compartments.

UI MeSH Term Description Entries
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D011485 Protein Binding The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments. Plasma Protein Binding Capacity,Binding, Protein
D001853 Bone Marrow The soft tissue filling the cavities of bones. Bone marrow exists in two types, yellow and red. Yellow marrow is found in the large cavities of large bones and consists mostly of fat cells and a few primitive blood cells. Red marrow is a hematopoietic tissue and is the site of production of erythrocytes and granular leukocytes. Bone marrow is made up of a framework of connective tissue containing branching fibers with the frame being filled with marrow cells. Marrow,Red Marrow,Yellow Marrow,Marrow, Bone,Marrow, Red,Marrow, Yellow
D001854 Bone Marrow Cells Cells contained in the bone marrow including fat cells (see ADIPOCYTES); STROMAL CELLS; MEGAKARYOCYTES; and the immediate precursors of most blood cells. Bone Marrow Cell,Cell, Bone Marrow,Cells, Bone Marrow,Marrow Cell, Bone,Marrow Cells, Bone
D002454 Cell Differentiation Progressive restriction of the developmental potential and increasing specialization of function that leads to the formation of specialized cells, tissues, and organs. Differentiation, Cell,Cell Differentiations,Differentiations, Cell
D002455 Cell Division The fission of a CELL. It includes CYTOKINESIS, when the CYTOPLASM of a cell is divided, and CELL NUCLEUS DIVISION. M Phase,Cell Division Phase,Cell Divisions,Division Phase, Cell,Division, Cell,Divisions, Cell,M Phases,Phase, Cell Division,Phase, M,Phases, M
D004305 Dose-Response Relationship, Drug The relationship between the dose of an administered drug and the response of the organism to the drug. Dose Response Relationship, Drug,Dose-Response Relationships, Drug,Drug Dose-Response Relationship,Drug Dose-Response Relationships,Relationship, Drug Dose-Response,Relationships, Drug Dose-Response
D004357 Drug Synergism The action of a drug in promoting or enhancing the effectiveness of another drug. Drug Potentiation,Drug Augmentation,Augmentation, Drug,Augmentations, Drug,Drug Augmentations,Drug Potentiations,Drug Synergisms,Potentiation, Drug,Potentiations, Drug,Synergism, Drug,Synergisms, Drug
D004912 Erythrocytes Red blood cells. Mature erythrocytes are non-nucleated, biconcave disks containing HEMOGLOBIN whose function is to transport OXYGEN. Blood Cells, Red,Blood Corpuscles, Red,Red Blood Cells,Red Blood Corpuscles,Blood Cell, Red,Blood Corpuscle, Red,Erythrocyte,Red Blood Cell,Red Blood Corpuscle
D005260 Female Females

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