Compartmentalization of a haematopoietic growth factor (GM-CSF) by glycosaminoglycans in the bone marrow microenvironment

Nature ◽  
1987 ◽  
Vol 326 (6111) ◽  
pp. 403-405 ◽  
Author(s):  
Myrtle Y. Gordon ◽  
Graham P. Riley ◽  
Suzanne M. Watt ◽  
Melvyn F. Greaves
Keyword(s):  
Bone Marrow ◽  
Growth Factor ◽  
Bone Marrow Microenvironment ◽  
Gm Csf ◽  
Haematopoietic Growth Factor

scholarly journals Hepatocyte Growth Factor Is Constitutively Produced by Human Bone Marrow Stromal Cells and Indirectly Promotes Hematopoiesis

Blood ◽  
1997 ◽  
Vol 89 (5) ◽  
pp. 1560-1565 ◽  
Author(s):  
Kenji Takai ◽  
Junichi Hara ◽  
Kunio Matsumoto ◽  
Gaku Hosoi ◽  
Yuko Osugi ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Growth Factor ◽  
Hepatocyte Growth Factor ◽  
Stromal Cells ◽  
Mononuclear Cells ◽  
Gm Csf ◽  
Tumor Growth Factor ◽  
Cd34 Cells ◽  
Factor Α ◽  
Hepatocyte Growth

Bone marrow (BM) stromal cells are required for normal hematopoiesis. A number of soluble factors secreted by these cells that mediate hematopoiesis have been characterized. However, the mechanism of hematopoiesis cannot be explained solely by these known factors, and the existence of other, still unknown stromal factors has been postulated. We showed that hepatocyte growth factor (HGF ) is one such cytokine produced by human BM stromal cells. BM stromal cells were shown to constitutively produce HGF and also to express the c-MET/HGF receptor. The production of HGF was enhanced by addition of heparin and phorbol ester. Dexamethasone and tumor growth factor-β (TGF-β) inhibited the production of HGF. Interleukin-1α (IL-1α) tumor necrosis factor-α (TNF-α), and N6,2′-o-dibutyryl-adenosine-3′:5′-cyclic monophosphate (dbc-AMP) showed no obvious influence on HGF production. Western blot analysis of HGF derived from BM stromal cells showed two bands at 85 and 28 kD corresponding to native and variant HGF, respectively. Addition of recombinant HGF significantly promoted the formation of burst-forming unit-erythroid (BFU-E) and colony-forming unit-granulocyte erythroid macrophage (CFU-GEM) by BM mononuclear cells in the presence of erythropoietin and granulocyte-macrophage colony-stimulating factor (GM-CSF ), but the formation of CFU-GM was not modified. However, HGF had no effects on colony formation by purified CD34+ cells. Within BM mononuclear cells, c-MET was expressed on a proportion of cells (CD34−, CD33+, CD13+, CD14+, and CD15+), but was not found on CD34+ cells. We conclude that HGF is constitutively produced by BM stromal cells and that it enhances hematopoiesis. In addition, expression of c-MET on the stromal cells suggests the presence of an autocrine mechanism, operating through HGF, among stromal cells.

scholarly journals Stem cell factor and basic fibroblast growth factor are synergistic in augmenting committed myeloid progenitor cell growth

Blood ◽  
1994 ◽  
Vol 83 (4) ◽  
pp. 907-910 ◽  
Author(s):  
JL Gabrilove ◽  
K White ◽  
Z Rahman ◽  
EL Wilson
Keyword(s):  
Bone Marrow ◽  
Stem Cell ◽  
Growth Factor ◽  
Cell Growth ◽  
Fibroblast Growth Factor ◽  
Stromal Cells ◽  
Stem Cell Factor ◽  
Progenitor Cell ◽  
Fibroblast Growth ◽  
Gm Csf

Abstract Stem cell factor (SCF) and basic fibroblast growth factor (bFGF) are hematopoietic cytokines produced by bone marrow stromal cells. It is known that, although SCF and bFGF have limited clonogenic activity on their own, they can augment colony-stimulating factor (CSF)-mediated progenitor cell growth. Because these factors are both sequestered by stromal cells, we examined their interaction on progenitor cell growth in conjunction with granulocyte-macrophage-CSF (GM-CSF). In this study, we show that clonogenic growth derived from low-density bone marrow cells stimulated by GM-CSF is significantly augmented (P < .001) in the presence of maximal (100 ng/mL) concentrations of SCF in combination with 100 ng/mL of bFGF. When CD34+ cells are used, the synergistic effect of bFGF and SCF for GM-CSF-mediated progenitor cell growth is further increased, resulting in as much as a sevenfold increase in detectable colony-forming units granulocyte-macrophage (P < .001). These data suggest that the synergistic activity of bFGF and SCF is mediated directly on hematopoietic precursors. These observations suggest that bFGF and SCF, concentrated locally on stromal cell surfaces, might interact in concert with other hematopoietic cytokines to regulate stem cell proliferation and differentiation in hematopoietic niches in the bone marrow.

scholarly journals Hepatocyte Growth Factor Is Constitutively Produced by Human Bone Marrow Stromal Cells and Indirectly Promotes Hematopoiesis

Blood ◽  
1997 ◽  
Vol 89 (5) ◽  
pp. 1560-1565 ◽  
Author(s):  
Kenji Takai ◽  
Junichi Hara ◽  
Kunio Matsumoto ◽  
Gaku Hosoi ◽  
Yuko Osugi ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Growth Factor ◽  
Hepatocyte Growth Factor ◽  
Stromal Cells ◽  
Mononuclear Cells ◽  
Gm Csf ◽  
Tumor Growth Factor ◽  
Cd34 Cells ◽  
Factor Α ◽  
Hepatocyte Growth

Abstract Bone marrow (BM) stromal cells are required for normal hematopoiesis. A number of soluble factors secreted by these cells that mediate hematopoiesis have been characterized. However, the mechanism of hematopoiesis cannot be explained solely by these known factors, and the existence of other, still unknown stromal factors has been postulated. We showed that hepatocyte growth factor (HGF ) is one such cytokine produced by human BM stromal cells. BM stromal cells were shown to constitutively produce HGF and also to express the c-MET/HGF receptor. The production of HGF was enhanced by addition of heparin and phorbol ester. Dexamethasone and tumor growth factor-β (TGF-β) inhibited the production of HGF. Interleukin-1α (IL-1α) tumor necrosis factor-α (TNF-α), and N6,2′-o-dibutyryl-adenosine-3′:5′-cyclic monophosphate (dbc-AMP) showed no obvious influence on HGF production. Western blot analysis of HGF derived from BM stromal cells showed two bands at 85 and 28 kD corresponding to native and variant HGF, respectively. Addition of recombinant HGF significantly promoted the formation of burst-forming unit-erythroid (BFU-E) and colony-forming unit-granulocyte erythroid macrophage (CFU-GEM) by BM mononuclear cells in the presence of erythropoietin and granulocyte-macrophage colony-stimulating factor (GM-CSF ), but the formation of CFU-GM was not modified. However, HGF had no effects on colony formation by purified CD34+ cells. Within BM mononuclear cells, c-MET was expressed on a proportion of cells (CD34−, CD33+, CD13+, CD14+, and CD15+), but was not found on CD34+ cells. We conclude that HGF is constitutively produced by BM stromal cells and that it enhances hematopoiesis. In addition, expression of c-MET on the stromal cells suggests the presence of an autocrine mechanism, operating through HGF, among stromal cells.

scholarly journals Biologic significance of constitutive and subliminal growth factor production by bone marrow stroma

Blood ◽  
1992 ◽  
Vol 79 (12) ◽  
pp. 3168-3178 ◽  
Author(s):  
EL Kittler ◽  
H McGrath ◽  
D Temeles ◽  
RB Crittenden ◽  
VK Kister ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Growth Factor ◽  
Stromal Cells ◽  
Pokeweed Mitogen ◽  
Gm Csf ◽  
Bone Marrow Cultures ◽  
Growth Factor Production ◽  
Constitutive Production ◽  
Marrow Cultures

Abstract The “stromal” or adherent cells of long-term murine Dexter explant bone marrow cultures provide the best in vitro model of the bone marrow microenvironment. Colony-stimulating factor-1 (CSF-1) is produced constitutively by these cells and is easily detected, but most investigators have not found constitutive production of the other hemolymphopoietic cytokines. We have previously reported the detection of granulocyte-macrophage-CSF (GM-CSF) in murine stromal cultures and its induction by the lectin Pokeweed mitogen. The present studies analyzing stromal cytokine messenger RNA (mRNA) production by standard Northern blot analysis show constitutive production of mRNAs for CSF-1, GM-CSF, granulocyte-CSF (G-CSF), c-kit ligand (KL), and interleukin-6 (IL-6), but not IL-3, IL-4, or IL-5 by 3-week irradiated or nonirradiated murine Dexter stromal cells. Exposure of stromal cells to Pokeweed mitogen or IL-1 16 hours before RNA harvest induces the messages for GM-CSF, G-CSF, KL, and IL-6, but not IL-3, IL-4, IL-5, or CSF-1. Polymerase chain reaction amplification of cDNA made with reverse transcriptase from stromal RNA using two separate sets of IL-3- specific primers shows the presence of IL-3 message in irradiated stromal cells, which is only detectable with this more sensitive technique. The factor-dependent cell lines FDC-P1 and 32D are supported by the stromal cells without the addition of exogenous growth factors, demonstrating a cytokine activity in these cultures that is inhibited by the addition of anti-IL-3 or anti-GM-CSF antibodies. These data indicate that murine Dexter stromal cells constitutively produce CSF-1, GM-CSF, G-CSF, IL-6, KL, and IL-3. This growth factor production could explain the support of granulocyte, macrophage, and megakaryocyte production and stem cell maintenance in Dexter-type long-term murine bone marrow cultures.

Down-Regulation of Toll-Like Receptor 4 Expression in Transforming Growth Factor β1 Treated Murine Dendritic Cells: Implications of Maturation Resistant to Lipopolysaccharide.

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 3803-3803
Author(s):  
Maofang Lin ◽  
Haibo Mou ◽  
Hong Cen
Keyword(s):  
Bone Marrow ◽  
Growth Factor ◽  
Transforming Growth Factor ◽  
Transforming Growth Factor Β1 ◽  
Brdu Incorporation ◽  
Toll Like Receptor ◽  
Toll Like Receptor 4 ◽  
Murine Bone Marrow ◽  
Gm Csf ◽  
Tgf Β1

Abstract Evidences accumulated that immature dendritic cell (iDC) could inhibit alloantigen-specific T cell responses and prolong the survival time of allografts. However, the tolerogenic properties of these iDCs were often unstable or inconsistent because of in vivo maturation, such as lipopolysaccharide (LPS) stimulating. Toll-like receptor 4(TLR4) has been reported to act as a receptor for LPS and LPS can stimulate iDC to mature DC (mDC) via TLR4 signal transduction pathway. In this study, we investigated the effects of transforming growth factor β1 on murine bone marrow derived DCs. Murine bone marrow cells were cultured with GM-CSF and TGF-β1 to generate TGF-β1 treated DCs (TGFβ-DCs). Compared to iDCs cultured by GM-CSF alone, the TGFβ-DCs had no significant alterations in ultrastructure after LPS stimulation. Surface expression of CD80, CD86, CD40, MHC-II were inhibited by addition of TGF-β1, especially in CD80, CD86 (p<0.05). Furthermore, the iDCs were sensitive to further maturation in response to LPS by showing increased levels of MHC class II, CD80, CD86 and CD40. In marked contrast, TGF-β1 prevented this LPS-mediated maturation and maintained the cells in the immature state, with low levels of surface costimulatory molecules expression. Using BrdU incorporation method, after 96 h mix lymphocyte reaction, TGFβ-DCs had weaker allogeneic stimulating capacity than iDCs. Importantly, LPS stimulating strongly promoted the allostimulatory capacity of iDCs, whereas only slightly affected TGFβ-DCs. TGFβ-DCs also showed decreased IL-12p70 production and impaired NF-κB activation after LPS stimulation. We also found the expression of TLR4 mRNA on TGFβ-DCs was weaker than that on iDCs by RT-PCR. Moreover, the results of flow cytometry revealed the positive expression percentages of TLR4/MD2 complex on iDCs and TGFβ-DCs were (51.8±3.89% vs. 15.7±4.13%, p<0.01) and the mean fluorescence intensities (MFIs) were (2.37±0.26 vs. 1.36±0.17, p<0.05). These results agreed with previous findings that TGFβ-DCs responded weakly to LPS. In summary, TGFβ-DC is resistant to maturation stimulus (LPS) and might have some correlation with the down-modulation of TLR4 expression.

Abstract 549: Extracellular Heat Shock Protein 27 Signals Through NF-κB to Favorably Modulate Macrophage Inflammation

2012 ◽  
Vol 32 (suppl_1) ◽  
Author(s):  
Tara Seibert ◽  
Chunhua Shi ◽  
Yong-Xiang Chen ◽  
Samira Salari ◽  
Joshua Raizman ◽  
...  
Keyword(s):  
Growth Factor ◽  
Heat Shock ◽  
Heat Shock Protein ◽  
Reporter Gene ◽  
Nuclear Translocation ◽  
Atherosclerotic Lesion ◽  
Heat Shock Protein 27 ◽  
Therapeutic Effects ◽  
Gm Csf ◽  
Haematopoietic Growth Factor

Background: Previously we demonstrated that recombinant Heat Shock Protein 27 (rHSP27) reduces atherosclerotic lesion formation when administered to ApoE -/- mice. In addition, administration of rHSP27 to ApoE -/- mice with established atherosclerotic lesions halts lesion progression and is associated with lesion modifications that are consistent with resilience to plaque rupture. However, the mechanism(s) for these therapeutic effects remain elusive. Objective: To determine whether rHSP27 favorably modulates macrophage inflammation by focusing on NF-kB signaling. Methods/Results: Activation of the NF-kB signaling pathway by rHSP27 was observed in peritoneal macrophages from ApoE -/- mice. Treatment with rHSP27 for 30 minutes activated the translocation of the NF-kB p65 subunit from the cytosol to the nucleus as observed by immunolabeling. A dose-dependant increase in rHSP27 mediated NF-kB activation was observed in RAW 264.7 macrophages stably transfected with an NF-kB inducible reporter gene (15 fold; p<0.05). The use of an N-terminal deletion mutant of rHSP27, rC1, at equimolar concentrations did not induce NF-kB activation, demonstrating specificity of the full-length protein. In addition, NF-kB inhibitors (BAY 11-7082 and MG-132) attenuated the induction of the NF-kB reporter gene by rHSP27, thereby implicating the involvement of IkBa phosphorylation and degradation by the proteasome. A consequence of rHSP27 signaling in macrophages was the up-regulation of the transcript for the haematopoietic growth factor/regulator, GM-CSF (300 fold; p<0.05) and subsequently its secretion (400 fold, p<0.05). In the presence of BAY, GM-CSF expression was inhibited suggesting the involvement of NF-kB. Conclusions: rHSP27 promotes the nuclear translocation and activation of NF-kB in macrophages which results in the up-regulation of GM-CSF, a haematopoietic growth factor/regulator that may be responsible for the observed therapeutic effects of rHSP27 in vivo. Current studies are testing rHSP27 therapy in ApoE -/- mice deficient in GM-CSF in order to evaluate the importance of macrophage modulation for the beneficial affects of rHSP27 in atherogenesis.

scholarly journals Hepatocyte growth factor pathway upregulation in the bone marrow microenvironment in multiple myeloma is associated with lytic bone disease

2013 ◽  
Vol 161 (3) ◽  
pp. 373-382 ◽  
Author(s):  
Ida B. Kristensen ◽  
Jacob H. Christensen ◽  
Maria B. Lyng ◽  
Michael B. Møller ◽  
Lise Pedersen ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Bone Marrow ◽  
Growth Factor ◽  
Hepatocyte Growth Factor ◽  
Bone Disease ◽  
Bone Marrow Microenvironment ◽  
Hepatocyte Growth

Role of Downstream Effectors in Kras-Driven Myeloproliferative Disease.

Blood ◽  
2007 ◽  
Vol 110 (11) ◽  
pp. 1617-1617
Author(s):  
Angell C. Shieh ◽  
Kevin M. Shannon
Keyword(s):  
Bone Marrow ◽  
Growth Factor ◽  
Pi3 Kinase ◽  
Ras Signaling ◽  
Gm Csf ◽  
Oncogenic Ras ◽  
Downstream Effectors ◽  
Effector Pathway ◽  
Effector Pathways

Abstract Mutations that deregulate Ras signaling are highly prevalent in myeloid malignancies. Previous work has shown that expressing oncogenic KrasG12D in hematopoietic cells from the endogenous Kras promoter leads to growth factor-independent and hypersensitive myeloid progenitor colony formation, and causes a fatal myeloproliferative disorder (MPD) (Braun et al PNAS101:597, 2004; Chan et al JCI113:528, 2004). These characteristics mirror the human juvenile and chronic myelomonocytic leukemias (JMML and CMML) - diseases that are associated with Ras pathway mutations. Oncogenic Ras accumulates in its active GTP-bound form and constitutively activates a number of downstream effectors. However, it is unclear which effectors are necessary for the maintenance of disease as well as how they contribute to specific phenotypes such as enhanced proliferation and defective apoptosis. We constructed second site mutants - secondary mutations on a backbone of KrasG12D(G12D) that prevent K-RasG12D from binding to a subset of effectors - to begin to elucidate the individual contributions of downstream effector pathways to hematologic disease. Murine fetal liver cells engineered to express KrasG12D,E37G(E37G) and KrasG12D,Y64G(Y64G) second site mutants maintain a hypersensitive pattern of colony-forming unit granulocyte-macrophage (CFU-GM) colony growth in response to granulocyte-macrophage colony-stimulating factor (GM-CSF), but are no longer able to grow in the absence of GM-CSF. Interestingly, both mutant proteins that display hypersensitivity also hyperactivate two major Ras effector pathways, as opposed to other second site mutants tested which only hyperactivate one major Ras effector pathway and do not show growth factor hypersensitivity. Whereas E37G activates both PI3 kinase and Ral-GDS but not Raf, Y64G stimulates Raf/MEK/ERK and PI3 kinase but not Ral-GDS. Consistent with the idea that activation of at least two effector cascades is required for aberrant in vitro growth, expression of activated effectors BrafV600E, p110a-CAAX, and RalGDS-CAAX did not confer GM-CSF hypersensitivity on CFU-GM colonies. We transplanted bone marrow cells transduced with MSCV-E37G-IRES-GFP or MSCV-Y64G-IRES-GFP retroviruses into lethally irradiated Balb/c mice. Seven of 8 mice that received Y64G cells died of T lineage acute lymphoid leukemia/lymphoma (T-ALL/L) with a median survival of 112 days. Diseased animals showed very high levels of GFP in the thymus, spleen, peripheral blood and bone marrow. Four of 9 mice injected with E37G-expressing cells mice also died of T-ALL/L with a median survival of 106 days and three of 9 died of anemia. None of the MIG mice (n=8) have died of leukemia/lymphoma. The Y64G and E37G T ALL/Ls studied to date are transplantable into sublethally irradiated recipients. We conclude that second site mutations in the KrasG12D oncogene that are defective for activation of either PI3 kinase or Raf/MEK/ERK are able to deregulate the growth of primary hematopoietic cells in vitro and in vivo. These data argue that targeting a single effector pathway downstream of oncogenic Ras may not be effective in many hematologic malignancies. We are interrogating Ras signaling networks in T-ALL/L cells and cloning MSCV integration sites to further characterize the effects of these second site mutant alleles.

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