Functional analysis of human hematopoietic repopulating cells mobilized with granulocyte colony-stimulating factor alone versus granulocyte colony-stimulating factor in combination with stem cell factor

Blood ◽  
2002 ◽  
Vol 100 (3) ◽  
pp. 869-878 ◽  
Author(s):  
David A. Hess ◽  
Krysta D. Levac ◽  
Francis N. Karanu ◽  
Michael Rosu-Myles ◽  
Martin J. White ◽  
...  
Keyword(s):  
Stem Cell ◽  
Stem Cell Factor ◽  
Fold Increase ◽  
Granulocyte Colony Stimulating Factor ◽  
Colony Stimulating Factor ◽  
Cell Content ◽  
Serum Free ◽  
Nonobese Diabetic ◽  
Stimulating Factor

Abstract Using in vitro progenitor assays, serum-free in vitro cultures, and the nonobese diabetic/severe combined immune-deficient (NOD/SCID) ecotropic murine virus knockout xenotransplantation model to detect human SCID repopulating cells (SRCs) with multilineage reconstituting function, we have characterized and compared purified subpopulations harvested from the peripheral blood (PB) of patients receiving granulocyte colony-stimulating factor (G-CSF) alone or in combination with stem cell factor (SCF). Mobilized G-CSF plus SCF PB showed a 2-fold increase in total mononuclear cell content and a 5-fold increase in CD34-expressing cells depleted for lineage-marker expression (CD34+Lin−) as compared with patients treated with G-CSF alone. Functionally, G-CSF plus SCF–mobilized CD34+CD38−Lin−cells contained a 2-fold enhancement in progenitor frequency as compared with G-CSF–mobilized subsets. Despite enhanced cellularity and progenitor capacity, G-CSF plus SCF mobilization did not increase the frequency of SRCs as determined by limiting dilution analysis by means of unfractionated PB cells. Purification of SRCs from these sources demonstrated that as few as 1000 CD34+CD38−Lin− cells from G-CSF–mobilized PB contained SRC capacity while G-CSF plus SCF–mobilized CD34+CD38−Lin−cells failed to repopulate at doses up to 500 000 cells. In addition, primitive CD34−CD38−AC133+Lin−cells derived from G-CSF plus SCF–mobilized PB were capable of differentiation into CD34-expressing cells, while the identical subfractions from G-CSF PB were unable to produce CD34+cells in serum-free cultures. Our study defines qualitative and quantitative distinctions among subsets of primitive cells mobilized by means of G-CSF plus SCF versus G-CSF alone, and therefore has implications for the utility of purified repopulating cells from these sources.

scholarly journals The combination of granulocyte colony-stimulating factor and stem cell factor significantly increases the number of bone marrow–derived endothelial cells in brains of mice following cerebral ischemia

Blood ◽  
2008 ◽  
Vol 111 (12) ◽  
pp. 5544-5552 ◽  
Author(s):  
Zsuzsanna E. Toth ◽  
Ronen R. Leker ◽  
Tal Shahar ◽  
Sandra Pastorino ◽  
Ildiko Szalayova ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Endothelial Cells ◽  
Stem Cell ◽  
Stem Cell Factor ◽  
Fluorescent Protein ◽  
Fold Increase ◽  
Granulocyte Colony Stimulating Factor ◽  
Colony Stimulating Factor ◽  
Hematopoietic Stem ◽  
Stimulating Factor

Abstract Granulocyte colony-stimulating factor (G-CSF) induces proliferation of bone marrow–derived cells. G-CSF is neuroprotective after experimental brain injury, but the mechanisms involved remain unclear. Stem cell factor (SCF) is a cytokine important for the survival and differentiation of hematopoietic stem cells. Its receptor (c-kit or CD117) is present in some endothelial cells. We aimed to determine whether the combination of G-CSF/SCF induces angiogenesis in the central nervous system by promoting entry of endothelial precursors into the injured brain and causing them to proliferate there. We induced permanent middle cerebral artery occlusion in female mice that previously underwent sex-mismatched bone marrow transplantation from enhanced green fluorescent protein (EGFP)–expressing mice. G-CSF/SCF treatment reduced infarct volumes by more than 50% and resulted in a 1.5-fold increase in vessel formation in mice with stroke, a large percentage of which contain endothelial cells of bone marrow origin. Most cells entering the brain maintained their bone marrow identity and did not transdifferentiate into neural cells. G-CSF/SCF treatment also led to a 2-fold increase in the number of newborn cells in the ischemic hemisphere. These findings suggest that G-CSF/SCF treatment might help recovery through induction of bone marrow–derived angiogenesis, thus improving neuronal survival and functional outcome.

scholarly journals Effects of granulocyte colony-stimulating factor and stem cell factor, alone and in combination, on the mobilization of peripheral blood cells that engraft lethally irradiated dogs

Blood ◽  
1994 ◽  
Vol 83 (12) ◽  
pp. 3795-3799 ◽  
Author(s):  
T de Revel ◽  
FR Appelbaum ◽  
R Storb ◽  
F Schuening ◽  
R Nash ◽  
...  
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Peripheral Blood ◽  
Stem Cell Factor ◽  
Low Dose ◽  
Fold Increase ◽  
Granulocyte Colony Stimulating Factor ◽  
Colony Stimulating Factor ◽  
Hematopoietic Progenitor ◽  
Stimulating Factor

The effects of recombinant canine granulocyte colony-stimulating factor (rcG-CSF) and recombinant canine stem cell factor (rcSCF), a c-kit ligand, on the circulation of hematopoietic progenitor and stem cells were studied in a canine model. Administration of rcG-CSF (10 micrograms/kg) for 7 days led to a 5.4-fold increase in CFU-GM/mL of blood, while 7 days of rcSCF (200 micrograms/kg) led to an 8.2-fold increase. Although treatment with low-dose rcSCF (25 micrograms/kg) had no effect on the level of peripheral blood progenitors, 7-day exposure to a combination of G-CSF plus low dose SCF led to a 21.6-fold increase (P = .03). To assess the ability of these factors to increase the circulation of cells capable of rescuing animals after lethal total body irradiation (TBI), 1 x 10(8) peripheral blood mononuclear cells (PBMC)/kg were collected and cryopreserved from animals after 7 days of treatment with G-CSF, SCF or a combination of the two. One month later, animals were exposed to 9.2 Gy TBI and transplanted with the previously collected cells. Control animals transplanted with 1 x 10(8) PBMC/kg collected without pretreatment died with marrow aplasia 11 to 29 days after TBI as did animals treated with only low-dose SCF before cell collection. In contrast, all animals given PBMC collected after G-CSF, high-dose SCF, or a combination of G-CSF plus low-dose SCF recovered granulocyte function. Recovery to 500 granulocytes/microL after transplant took 17, 18.8, and 13.6 days, respectively, (P = .056 for the difference between the combination G-CSF-SCF group and the other two groups). In both the G-CSF and SCF groups, 4 of 5 animals completely recovered while 1 of 5 in each group died with prolonged thrombocytopenia. In the combination group, all 5 animals became long- term survivors. These studies demonstrate that both G-CSF and SCF dramatically increase the level of peripheral blood hematopoietic progenitor and stem cells and support the view that these factors can act synergistically.

scholarly journals Increased numbers of long-term culture-initiating cells in the apheresis product of patients randomized to receive increasing doses of stem cell factor administered in combination with chemotherapy and a standard dose of granulocyte colony-stimulating factor

Blood ◽  
1996 ◽  
Vol 88 (9) ◽  
pp. 3323-3328 ◽  
Author(s):  
A Weaver ◽  
D Ryder ◽  
D Crowther ◽  
TM Dexter ◽  
NG Testa
Keyword(s):  
Stem Cell ◽  
Stem Cell Factor ◽  
Standard Dose ◽  
Fold Increase ◽  
Granulocyte Colony Stimulating Factor ◽  
Colony Stimulating Factor ◽  
Long Term Culture ◽  
To Receive ◽  
Stimulating Factor

Long-term culture-initiating cells (LTC-IC) are arguably the most primitive human hematopoietic cells detectable by in vitro functional assays. We have investigated the mobilization of these cells into the blood of patients with ovarian carcinoma randomized to receive granulocyte colony-stimulating factor (G-CSF; 5 micrograms/kg) plus different doses of stem cell factor (SCF; c-kit ligand) after chemotherapy or G-CSF alone after chemotherapy. We have shown a significant SCF dose response for the mobilization of LTC-IC, with a 5.8-fold increase in LTC-IC mobilization in those patients receiving chemotherapy, G-CSF, and 20 micrograms/kg of SCF, the highest dose used, compared with the patients receiving chemotherapy and G-CSF alone. We have shown a threefold increase in CD34+ cells and up to a 64-fold increase in CD34+/33- cells was seen in patients treated with chemotherapy, G-CSF, and 20 micrograms/kg of SCF compared with those patients treated with chemotherapy and G-CSF alone. However, significant numbers of CD34+/38- cells were only found in the patients receiving 20 micrograms/kg of SCF as part of their mobilization regimen. Patients receiving chemotherapy plus G-CSF and SCF have enhanced mobilization of primitive cells and of the more committed progenitor cells compared with those patients receiving chemotherapy followed by G-CSF alone.

scholarly journals Effects of granulocyte colony-stimulating factor and stem cell factor, alone and in combination, on the mobilization of peripheral blood cells that engraft lethally irradiated dogs

Blood ◽  
1994 ◽  
Vol 83 (12) ◽  
pp. 3795-3799 ◽  
Author(s):  
T de Revel ◽  
FR Appelbaum ◽  
R Storb ◽  
F Schuening ◽  
R Nash ◽  
...  
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Peripheral Blood ◽  
Stem Cell Factor ◽  
Low Dose ◽  
Fold Increase ◽  
Granulocyte Colony Stimulating Factor ◽  
Colony Stimulating Factor ◽  
Hematopoietic Progenitor ◽  
Stimulating Factor

Abstract The effects of recombinant canine granulocyte colony-stimulating factor (rcG-CSF) and recombinant canine stem cell factor (rcSCF), a c-kit ligand, on the circulation of hematopoietic progenitor and stem cells were studied in a canine model. Administration of rcG-CSF (10 micrograms/kg) for 7 days led to a 5.4-fold increase in CFU-GM/mL of blood, while 7 days of rcSCF (200 micrograms/kg) led to an 8.2-fold increase. Although treatment with low-dose rcSCF (25 micrograms/kg) had no effect on the level of peripheral blood progenitors, 7-day exposure to a combination of G-CSF plus low dose SCF led to a 21.6-fold increase (P = .03). To assess the ability of these factors to increase the circulation of cells capable of rescuing animals after lethal total body irradiation (TBI), 1 x 10(8) peripheral blood mononuclear cells (PBMC)/kg were collected and cryopreserved from animals after 7 days of treatment with G-CSF, SCF or a combination of the two. One month later, animals were exposed to 9.2 Gy TBI and transplanted with the previously collected cells. Control animals transplanted with 1 x 10(8) PBMC/kg collected without pretreatment died with marrow aplasia 11 to 29 days after TBI as did animals treated with only low-dose SCF before cell collection. In contrast, all animals given PBMC collected after G-CSF, high-dose SCF, or a combination of G-CSF plus low-dose SCF recovered granulocyte function. Recovery to 500 granulocytes/microL after transplant took 17, 18.8, and 13.6 days, respectively, (P = .056 for the difference between the combination G-CSF-SCF group and the other two groups). In both the G-CSF and SCF groups, 4 of 5 animals completely recovered while 1 of 5 in each group died with prolonged thrombocytopenia. In the combination group, all 5 animals became long- term survivors. These studies demonstrate that both G-CSF and SCF dramatically increase the level of peripheral blood hematopoietic progenitor and stem cells and support the view that these factors can act synergistically.

scholarly journals Severe congenital neutropenia: abnormal growth and differentiation of myeloid progenitors to granulocyte colony-stimulating factor (G-CSF) but normal response to G-CSF plus stem cell factor

Blood ◽  
1993 ◽  
Vol 82 (10) ◽  
pp. 2991-2997 ◽  
Author(s):  
K Hestdal ◽  
K Welte ◽  
SO Lie ◽  
JR Keller ◽  
FW Ruscetti ◽  
...  
Keyword(s):  
Stem Cell ◽  
Stem Cell Factor ◽  
Granulocyte Colony Stimulating Factor ◽  
Colony Stimulating Factor ◽  
Severe Congenital Neutropenia ◽  
Congenital Neutropenia ◽  
Gm Csf ◽  
Stimulating Factor ◽  
Myeloid Progenitors

Abstract Several mechanisms have been proposed to explain the pathogenesis of severe congenital neutropenia (SCN); however, the mechanism(s) still remains unknown. In particular, clinical observations suggest that abnormal responsiveness of myeloid progenitors to hematopoietic growth factors (HGFs) is a possible mechanism. Therefore, to better define the status of hematopoietic progenitors in the bone marrow (BM) of patients with SCN, the responsiveness of myeloid progenitors to HGFs from two SCN patients was compared with the responsiveness of progenitors from healthy individuals. BM cells (BMCs) from the first SCN patient required higher (10- to 100-fold) concentrations of granulocyte colony- stimulating factor (G-CSF) to achieve maximal and half-maximal colony growth in vitro compared with BMCs from controls. In contrast, the dose- response of interleukin-3 (IL-3) and granulocyte-macrophage-CSF (GM- CSF) in colony formation was normal. Interestingly, IL-3, GM-CSF, and G- CSF at optimal doses showed reduced ability to induce neutrophil differentiation of BMCs from a SCN patient compared with BMCs from controls. Despite an abnormal responsiveness of mature myeloid progenitors to G-CSF in this SCN patient, myeloid progenitors responsive to the combination of stem cell factor (SCF) and G-CSF showed normal dose-response. In contrast to G-CSF alone, the combination of G-CSF and SCF induced the formation of neutrophils almost to the same extent compared with cultures of normal BMCs. Furthermore, also on BM progenitor cells obtained from the second patient with SCN, SCF highly synergized with G-CSF to promote neutrophil progenitor cell growth and differentiation in vitro. Thus, these results indicate that one mechanism of the pathogenesis in SCN patients is reduced responsiveness of neutrophil progenitor cells to G- CSF and that SCF can enhance the responsiveness of these cells to G-CSF.

scholarly journals Severe congenital neutropenia: abnormal growth and differentiation of myeloid progenitors to granulocyte colony-stimulating factor (G-CSF) but normal response to G-CSF plus stem cell factor

Blood ◽  
1993 ◽  
Vol 82 (10) ◽  
pp. 2991-2997 ◽  
Author(s):  
K Hestdal ◽  
K Welte ◽  
SO Lie ◽  
JR Keller ◽  
FW Ruscetti ◽  
...  
Keyword(s):  
Stem Cell ◽  
Stem Cell Factor ◽  
Granulocyte Colony Stimulating Factor ◽  
Colony Stimulating Factor ◽  
Severe Congenital Neutropenia ◽  
Congenital Neutropenia ◽  
Gm Csf ◽  
Stimulating Factor ◽  
Myeloid Progenitors

Several mechanisms have been proposed to explain the pathogenesis of severe congenital neutropenia (SCN); however, the mechanism(s) still remains unknown. In particular, clinical observations suggest that abnormal responsiveness of myeloid progenitors to hematopoietic growth factors (HGFs) is a possible mechanism. Therefore, to better define the status of hematopoietic progenitors in the bone marrow (BM) of patients with SCN, the responsiveness of myeloid progenitors to HGFs from two SCN patients was compared with the responsiveness of progenitors from healthy individuals. BM cells (BMCs) from the first SCN patient required higher (10- to 100-fold) concentrations of granulocyte colony- stimulating factor (G-CSF) to achieve maximal and half-maximal colony growth in vitro compared with BMCs from controls. In contrast, the dose- response of interleukin-3 (IL-3) and granulocyte-macrophage-CSF (GM- CSF) in colony formation was normal. Interestingly, IL-3, GM-CSF, and G- CSF at optimal doses showed reduced ability to induce neutrophil differentiation of BMCs from a SCN patient compared with BMCs from controls. Despite an abnormal responsiveness of mature myeloid progenitors to G-CSF in this SCN patient, myeloid progenitors responsive to the combination of stem cell factor (SCF) and G-CSF showed normal dose-response. In contrast to G-CSF alone, the combination of G-CSF and SCF induced the formation of neutrophils almost to the same extent compared with cultures of normal BMCs. Furthermore, also on BM progenitor cells obtained from the second patient with SCN, SCF highly synergized with G-CSF to promote neutrophil progenitor cell growth and differentiation in vitro. Thus, these results indicate that one mechanism of the pathogenesis in SCN patients is reduced responsiveness of neutrophil progenitor cells to G- CSF and that SCF can enhance the responsiveness of these cells to G-CSF.

scholarly journals Stem cell factor in combination with granulocyte colony-stimulating factor (CSF) or granulocyte-macrophage CSF synergistically increases granulopoiesis in vivo

Blood ◽  
1991 ◽  
Vol 78 (8) ◽  
pp. 1954-1962 ◽  
Author(s):  
TR Ulich ◽  
J del Castillo ◽  
IK McNiece ◽  
ES Yi ◽  
CP Alzona ◽  
...  
Keyword(s):  
Stem Cell ◽  
Peripheral Blood ◽  
Stem Cell Factor ◽  
Granulocyte Colony Stimulating Factor ◽  
Colony Stimulating Factor ◽  
Gm Csf ◽  
Colony Forming Unit ◽  
Stimulating Factor ◽  
Synergistic Increase

Abstract Recombinant rat stem cell factor (rrSCF) and recombinant human granulocyte colony-stimulating factor (G-CSF) coinjected for 1 week in rats cause a synergistic increase in mature marrow neutrophils accompanied by a striking decrease in erythroid and lymphoid marrow elements. The spleens of the same rats show increased granulopoiesis as well as increased erythropoiesis as compared with the spleens of rats treated with either growth factor alone. Splenic extramedullary erythropoiesis may act to compensate for the decrease in marrow erythropoiesis. The coinjection of rrSCF and G-CSF causes an increase in marrow mast cells at the end of 1 week, but the increase is much less than in rrSCF-alone-treated rats. The combination of rrSCF and G- CSF increases the rate of release of marrow neutrophils into the circulation and causes a dramatic synergistic peripheral neutrophilia, beginning especially after 4 days of treatment. Colony-forming assays of all experimental groups showed a synergistic increase in colony- forming unit granulocyte-macrophage (CFU-GM) in the marrow, but not in peripheral blood, after coincubation with SCF plus granulocyte- macrophage CSF (GM-CSF) as opposed to GM-CSF alone, showing anatomic compartmentalization between a more primitive marrow CFU-GM subset and a more mature peripheral blood CFU-GM subset. In vivo daily administration of SCF plus GM-CSF results in a synergistic increase in marrow neutrophils, but not the striking synergistic increase in circulating neutrophils that is observed with SCF plus G-CSF.

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