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Selleri C, Montuori N, Salvati A, Serio B, Pesapane A, Ricci P, Gorrasi A, Li Santi A, Hoyer-Hansen G, Ragno P. Involvement of urokinase receptor in the cross-talk between human hematopoietic stem cells and bone marrow microenvironment. Oncotarget 2018; 7:60206-60217. [PMID: 27517491 PMCID: PMC5312379 DOI: 10.18632/oncotarget.11115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 07/18/2016] [Indexed: 02/02/2023] Open
Abstract
Hematopoietic stem cells (HSCs) reside in bone marrow (BM) and can be induced to mobilize into the circulation for transplantation. Homing and lodgement into BM of transplanted HSCs are the first critical steps in their engraftment and involve multiple interactions between HSCs and the BM microenvironment.uPAR is a three domain receptor (DIDIIDIII) which binds urokinase, vitronectin, integrins. uPAR can be cleaved and shed from the cell surface generating full-length and cleaved soluble forms (suPAR and DIIDIII-suPAR). DIIDIII-suPAR can bind fMLF receptors through the SRSRY sequence (residues 88-92).We previously reported the involvement of soluble uPAR in HSC mobilization. We now investigate its possible role in HSC homing and engraftment.We show similar levels of circulating full-length suPAR in healthy donors and in acute myeloid leukemia (AML) patients before and after the pre-transplant conditioning regimen. By contrast, levels of circulating DIIDIII-suPAR in AML patients are higher as compared to controls and significantly decrease after the conditioning.We found that suPAR and uPAR84-95, a uPAR-derived peptide which mimics active DIIDIII-suPAR, induce a significant increase in Long Term Culture (LTC)-Initiating Cells (ICs) and in the release of clonogenic progenitors from LTCs of CD34+ HSCs. Further, suPAR increases adhesion and survival of CD34+ KG1 AML cells, whereas uPAR84-95 increases their proliferation.Thus, circulating DIIDIII-suPAR, strongly increased in HSC mobilization, is indeed down-regulated by pre-transplant conditioning, probably to favour HSC homing. BM full-length suPAR and DIIDIII-suPAR may be involved in HSC lodgement within the BM by contributing to a suitable microenvironment.
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Affiliation(s)
- Carmine Selleri
- Department of Medicine and Surgery, University of Salerno, Salerno, Italy
| | - Nunzia Montuori
- Department of Translational Medical Sciences, "Federico II" University, Naples, Italy
| | - Annamaria Salvati
- Department of Chemistry and Biology, University of Salerno, Salerno, Italy
| | - Bianca Serio
- Department of Medicine and Surgery, University of Salerno, Salerno, Italy
| | - Ada Pesapane
- Department of Translational Medical Sciences, "Federico II" University, Naples, Italy
| | - Patrizia Ricci
- Department of Medicine and Surgery, University of Salerno, Salerno, Italy
| | - Anna Gorrasi
- Department of Chemistry and Biology, University of Salerno, Salerno, Italy
| | - Anna Li Santi
- Department of Chemistry and Biology, University of Salerno, Salerno, Italy
| | | | - Pia Ragno
- Department of Chemistry and Biology, University of Salerno, Salerno, Italy
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High CD123 levels enhance proliferation in response to IL-3, but reduce chemotaxis by downregulating CXCR4 expression. Blood Adv 2017; 1:1067-1079. [PMID: 29296749 DOI: 10.1182/bloodadvances.2016002931] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 05/21/2017] [Indexed: 11/20/2022] Open
Abstract
High expression of the α chain of the interleukin-3 receptor (IL-3Rα; CD123) is a hallmark of acute myeloid leukemia (AML) leukemic stem cells (LSCs). Elevated CD123 expression is part of the diagnostic immunophenotyping of myeloid leukemia, and higher expression is associated with poor prognosis. However, the biological basis of the poorer prognosis is unclear, and may include heightened IL-3 signaling and non-cell autonomous interactions with the bone marrow (BM) microenvironment. We used TF-1 cells expressing different levels of CD123 and found elevated CD123 levels amplified the proliferative response to exogenous IL-3 and maintained viability in reducing IL-3 concentrations. This was associated with stronger activation of STAT5, Akt, and extracellular signal-regulated kinase 1/2 in vitro. Surprisingly, in vivo e14.5 fetal liver cells transduced with retroviral constructs to express high CD123 failed to engraft in syngeneic recipients. In exploring the underlying mechanism for this, we found that CXCR4, a key molecule involved in LSC/BM interactions, was specifically downregulated in CD123 overexpressing cells in a manner dependent on IL-3 signaling. CXCR4 downregulation was sufficient to alter the chemotactic response of hematopoietic cells to stromal derived factor-1 (SDF-1). Thus, we propose that the overexpression of CD123 in AML LSC dictates their location by altering CXCR4/SDF-1 interaction in the BM, raising the possibility that this mechanism underpins the egress of BM AML LSC and more mature cells into the circulation.
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Molaeipour Z, Shamsasanjan K, Movassaghpour AA, Akbarzadehlaleh P, Sabaghi F, Saleh M. The Effect of Bone Marrow Mesenchymal Stem Cells on Vitamin D3 Induced Monocytic Differentiation of U937 Cells. Adv Pharm Bull 2016; 6:23-9. [PMID: 27123414 DOI: 10.15171/apb.2016.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 12/27/2015] [Accepted: 01/07/2016] [Indexed: 12/30/2022] Open
Abstract
PURPOSE Mesenchymal stem cells (MSCs) are key components of the hematopoietic stem cells (HSCs) niche. They control the process of hematopoiesis by secreting regulatory cytokines, growth factors and expression of important cell adhesion molecules for cell-tocell interactions. In this research, we have investigated the effect of bone marrow derived MSCs on monocytic differentiation of U937 cells line. METHODS U937 cells were cultured in both direct co-culture with MSCs and MSCs conditioned medium (C.M) driven. This study used 1,25-dihydroxyvitamin D3(VitD3) as inductor of monocytic differentiation and U937 cells treated with VitD3 morphology was examined by Wright Giemsa staining. CD14 monocytic differentiation marker was measured by flow cytometry and monocytic gene expression was assessed by real time polymerase chain reaction (RT PCR). RESULTS The results of flow cytometric analysis showed that CD14 expression of U937 increased. The higher effect of MSCs co-culture on CD14 expression in U937 cells was observed, compared to the conditioned medium. Among ten monocytic related genes which were screened that was observed increase in 5 genes in which CXCR4 and CSF2RA showed significant increase. CONCLUSION The results obtained show that MSCs have supportive effect on the monocytic differentiation of U937 cells. However, a distinct mechanism of that remains unclear.
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Affiliation(s)
- Zahra Molaeipour
- Hematology Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Karim Shamsasanjan
- Hematology Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Parvin Akbarzadehlaleh
- Pharmaceutical Biotechnology Department, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Fatemeh Sabaghi
- Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran
| | - Mahshid Saleh
- Hematology Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Molaeipour Z, Shamsasanjan K, Movassaghpour AA, Akbarzadehlaleh P, Sabaghi F, Saleh M. The Effect of Bone Marrow Mesenchymal Stem Cells on Vitamin D3 Induced Monocytic Differentiation of U937 Cells. Adv Pharm Bull 2016; 6:23-29. [PMID: 27123414 PMCID: PMC4845548 DOI: 10.15171/apb.2016.05] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 12/27/2015] [Accepted: 01/07/2016] [Indexed: 08/05/2023] Open
Abstract
PURPOSE Mesenchymal stem cells (MSCs) are key components of the hematopoietic stem cells (HSCs) niche. They control the process of hematopoiesis by secreting regulatory cytokines, growth factors and expression of important cell adhesion molecules for cell-tocell interactions. In this research, we have investigated the effect of bone marrow derived MSCs on monocytic differentiation of U937 cells line. METHODS U937 cells were cultured in both direct co-culture with MSCs and MSCs conditioned medium (C.M) driven. This study used 1,25-dihydroxyvitamin D3(VitD3) as inductor of monocytic differentiation and U937 cells treated with VitD3 morphology was examined by Wright Giemsa staining. CD14 monocytic differentiation marker was measured by flow cytometry and monocytic gene expression was assessed by real time polymerase chain reaction (RT PCR). RESULTS The results of flow cytometric analysis showed that CD14 expression of U937 increased. The higher effect of MSCs co-culture on CD14 expression in U937 cells was observed, compared to the conditioned medium. Among ten monocytic related genes which were screened that was observed increase in 5 genes in which CXCR4 and CSF2RA showed significant increase. CONCLUSION The results obtained show that MSCs have supportive effect on the monocytic differentiation of U937 cells. However, a distinct mechanism of that remains unclear.
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Affiliation(s)
- Zahra Molaeipour
- Hematology Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Karim Shamsasanjan
- Hematology Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Parvin Akbarzadehlaleh
- Pharmaceutical Biotechnology Department, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Fatemeh Sabaghi
- Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran
| | - Mahshid Saleh
- Hematology Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Figueiredo LM, Costa EBO, Orellana MD, Picanço-Castro V, Covas DT. OP9 Stromal Cells Proteins Involved in Hematoendothelial Differentiation from Human Embryonic Stem Cells. Cell Reprogram 2015; 17:338-46. [PMID: 26295456 DOI: 10.1089/cell.2015.0014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Hematopoietic cells (HCs) and endothelial cells (ECs) can be produced in vitro from human embryonic stem cells (hESCs), but the differentiation systems used are still inefficient. To overcome this obstacle, it is necessary to understand the differentiation process. One of the methods used to obtain HCs and ECs from hESCs is their co-culture with stromal cells. The soluble factors secreted by these cells and cell-cell contact have a great impact on the differentiation process. Here, we performed comparative proteomic analyses of proteins obtained from the total extract of OP9 stromal cells and secreted by these cells before and during in vitro generation of HCs and ECs (hematoendothelial) from hESCs. We identified a total of 83 secreted and 759 intracellular proteins during differentiation. Twenty-five secreted and 181 proteins from the total extract were more abundant. Some secreted proteins are involved in cell-matrix interactions and HC and/or EC development. Moreover, 13 proteins of the total extract from OP9 cells that were exclusive/or more abundant during differentiation are involved in the Nrf2/Nfe2l2 gene pathway, that is, they are described to have a key role in oxidative stress and in hematopoietic development and maturation. Our proteomic profiles provide valuable insight about the proteins involved in in vitro hematoendothelial cell generation and in the future they might be used to optimize the differentiation process and produce both cell types in vitro.
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Affiliation(s)
- Lilian M Figueiredo
- 1 Department of Clinical Medicine/Ribeirão Preto Medical School, University of São Paulo , Brazil , 14040-900.,2 Center for Cell-based Therapy and Regional Blood Center , Ribeirão Preto, Brazil , 14051-140
| | - Everton B O Costa
- 1 Department of Clinical Medicine/Ribeirão Preto Medical School, University of São Paulo , Brazil , 14040-900.,2 Center for Cell-based Therapy and Regional Blood Center , Ribeirão Preto, Brazil , 14051-140
| | - Maristela D Orellana
- 1 Department of Clinical Medicine/Ribeirão Preto Medical School, University of São Paulo , Brazil , 14040-900.,2 Center for Cell-based Therapy and Regional Blood Center , Ribeirão Preto, Brazil , 14051-140
| | - Virginia Picanço-Castro
- 1 Department of Clinical Medicine/Ribeirão Preto Medical School, University of São Paulo , Brazil , 14040-900.,2 Center for Cell-based Therapy and Regional Blood Center , Ribeirão Preto, Brazil , 14051-140
| | - Dimas T Covas
- 1 Department of Clinical Medicine/Ribeirão Preto Medical School, University of São Paulo , Brazil , 14040-900.,2 Center for Cell-based Therapy and Regional Blood Center , Ribeirão Preto, Brazil , 14051-140
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Fosen KM, Thom SR. Hyperbaric oxygen, vasculogenic stem cells, and wound healing. Antioxid Redox Signal 2014; 21:1634-47. [PMID: 24730726 PMCID: PMC4175035 DOI: 10.1089/ars.2014.5940] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 04/14/2014] [Indexed: 12/15/2022]
Abstract
SIGNIFICANCE Oxidative stress is recognized as playing a role in stem cell mobilization from peripheral sites and also cell function. RECENT ADVANCES This review focuses on the impact of hyperoxia on vasculogenic stem cells and elements of wound healing. CRITICAL ISSUES Components of the wound-healing process in which oxidative stress has a positive impact on the various cells involved in wound healing are highlighted. A slightly different view of wound-healing physiology is adopted by departing from the often used notion of sequential stages: hemostatic, inflammatory, proliferative, and remodeling and instead organizes the cascade of wound healing as overlapping events or waves pertaining to reactive oxygen species, lactate, and nitric oxide. This was done because hyperoxia has effects of a number of cell signaling events that converge to influence cell recruitment/chemotaxis and gene regulation/protein synthesis responses which mediate wound healing. FUTURE DIRECTIONS Our alternative perspective of the stages of wound healing eases recognition of the multiple sites where oxidative stress has an impact on wound healing. This aids the focus on mechanistic events and the interplay among various cell types and biochemical processes. It also highlights the areas where additional research is needed.
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Affiliation(s)
- Katina M. Fosen
- Department of Emergency Medicine, Institute for Environmental Medicine, University of Pennsylvania Medical Center, Philadelphia, Pennsylvania
| | - Stephen R. Thom
- Department of Emergency Medicine, University of Maryland, Baltimore, Maryland
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Wobus M, List C, Dittrich T, Dhawan A, Duryagina R, Arabanian LS, Kast K, Wimberger P, Stiehler M, Hofbauer LC, Jakob F, Ehninger G, Anastassiadis K, Bornhäuser M. Breast carcinoma cells modulate the chemoattractive activity of human bone marrow-derived mesenchymal stromal cells by interfering with CXCL12. Int J Cancer 2014; 136:44-54. [PMID: 24806942 DOI: 10.1002/ijc.28960] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 04/16/2014] [Indexed: 12/12/2022]
Abstract
We investigated whether breast tumor cells can modulate the function of mesenchymal stromal cells (MSCs) with a special emphasis on their chemoattractive activity towards hematopoietic stem and progenitor cells (HSPCs). Primary MSCs as well as a MSC line (SCP-1) were cocultured with primary breast cancer cells, MCF-7, MDA-MB231 breast carcinoma or MCF-10A non-malignant breast epithelial cells or their conditioned medium. In addition, the frequency of circulating clonogenic hematopoietic progenitors was determined in 78 patients with breast cancer and compared with healthy controls. Gene expression analysis of SCP-1 cells cultured with MCF-7 medium revealed CXCL12 (SDF-1) as one of the most significantly downregulated genes. Supernatant from both MCF-7 and MDA-MB231 reduced the CXCL12 promoter activity in SCP-1 cells to 77% and 47%, respectively. Moreover, the CXCL12 mRNA and protein levels were significantly reduced. As functional consequence of lower CXCL12 levels, we detected a decreased trans-well migration of HSPCs towards MSC/tumor cell cocultures or conditioned medium. The specificity of this effect was confirmed by blocking studies with the CXCR4 antagonist AMD3100. Downregulation of SP1 and increased miR-23a levels in MSCs after contact with tumor cell medium as well as enhanced TGFβ1 expression were identified as potential molecular regulators of CXCL12 activity in MSCs. Moreover, we observed a significantly higher frequency of circulating colony-forming hematopoietic progenitors in patients with breast cancer compared with healthy controls. Our in vitro results propose a potential new mechanism by which disseminated tumor cells in the bone marrow may interfere with hematopoiesis by modulating CXCL12 in protected niches.
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Affiliation(s)
- Manja Wobus
- Division of Hematology, Oncology and Stem Cell Transplantation, Department of Medicine I, University Hospital Carl Gustav Carus, Technische Universiät Dresden, Germany
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Urao N, Ushio-Fukai M. Redox regulation of stem/progenitor cells and bone marrow niche. Free Radic Biol Med 2013; 54:26-39. [PMID: 23085514 PMCID: PMC3637653 DOI: 10.1016/j.freeradbiomed.2012.10.532] [Citation(s) in RCA: 119] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 10/02/2012] [Accepted: 10/05/2012] [Indexed: 01/19/2023]
Abstract
Bone marrow (BM)-derived stem and progenitor cell functions including self-renewal, differentiation, survival, migration, proliferation, and mobilization are regulated by unique cell-intrinsic and -extrinsic signals provided by their microenvironment, also termed the "niche." Reactive oxygen species (ROS), especially hydrogen peroxide (H(2)O(2)), play important roles in regulating stem and progenitor cell functions in various physiologic and pathologic responses. The low level of H(2)O(2) in quiescent hematopoietic stem cells (HSCs) contributes to maintaining their "stemness," whereas a higher level of H(2)O(2) within HSCs or their niche promotes differentiation, proliferation, migration, and survival of HSCs or stem/progenitor cells. Major sources of ROS are NADPH oxidase and mitochondria. In response to ischemic injury, ROS derived from NADPH oxidase are increased in the BM microenvironment, which is required for hypoxia and hypoxia-inducible factor-1α expression and expansion throughout the BM. This, in turn, promotes progenitor cell expansion and mobilization from BM, leading to reparative neovascularization and tissue repair. In pathophysiological states such as aging, atherosclerosis, heart failure, hypertension, and diabetes, excess amounts of ROS create an inflammatory and oxidative microenvironment, which induces cell damage and apoptosis of stem and progenitor cells. Understanding the molecular mechanisms of how ROS regulate the functions of stem and progenitor cells and their niche in physiological and pathological conditions will lead to the development of novel therapeutic strategies.
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Affiliation(s)
- Norifumi Urao
- Department of Pharmacology, Center for Lung and Vascular Biology, Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, IL 60612, USA
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Connexin-43 in the osteogenic BM niche regulates its cellular composition and the bidirectional traffic of hematopoietic stem cells and progenitors. Blood 2012; 119:5144-54. [PMID: 22498741 DOI: 10.1182/blood-2011-07-368506] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Connexin-43 (Cx43), a gap junction protein involved in control of cell proliferation, differentiation and migration, has been suggested to have a role in hematopoiesis. Cx43 is highly expressed in osteoblasts and osteogenic progenitors (OB/P). To elucidate the biologic function of Cx43 in the hematopoietic microenvironment (HM) and its influence in hematopoietic stem cell (HSC) activity, we studied the hematopoietic function in an in vivo model of constitutive deficiency of Cx43 in OB/P. The deficiency of Cx43 in OB/P cells does not impair the steady state hematopoiesis, but disrupts the directional trafficking of HSC/progenitors (Ps) between the bone marrow (BM) and peripheral blood (PB). OB/P Cx43 is a crucial positive regulator of transstromal migration and homing of both HSCs and progenitors in an irradiated microenvironment. However, OB/P Cx43 deficiency in nonmyeloablated animals does not result in a homing defect but induces increased endosteal lodging and decreased mobilization of HSC/Ps associated with proliferation and expansion of Cxcl12-secreting mesenchymal/osteolineage cells in the BM HM in vivo. Cx43 controls the cellular content of the BM osteogenic microenvironment and is required for homing of HSC/Ps in myeloablated animals.
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Paracrine molecules of mesenchymal stem cells for hematopoietic stem cell niche. BONE MARROW RESEARCH 2011; 2011:353878. [PMID: 22046560 PMCID: PMC3196250 DOI: 10.1155/2011/353878] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 07/26/2011] [Accepted: 07/26/2011] [Indexed: 12/24/2022]
Abstract
Hematopoietic stem cells (HSCs) and mesenchymal stem cells (MSCs) are both adult stem cells residing in the bone marrow. MSCs interact with HSCs, they stimulate and enhance the proliferation of HSCs by secreting regulatory molecules and cytokines, providing a specialized microenvironment for controlling the process of hematopoiesis. In this paper we discuss how MSCs contribute to HSC niche, maintain the stemness and proliferation of HSCs, and support HSC transplantation.
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Celebi B, Mantovani D, Pineault N. Effects of extracellular matrix proteins on the growth of haematopoietic progenitor cells. Biomed Mater 2011; 6:055011. [PMID: 21931196 DOI: 10.1088/1748-6041/6/5/055011] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Umbilical cord blood (UCB) transplantation and haematological recovery are currently limited by the amount of haematopoietic progenitor cells (HPCs) present in each unit. HPCs and haematopoietic stem cells (HSCs) normally interact with cells and extracellular matrix (ECM) proteins present within the endosteal and vascular niches. Hence, we investigated whether coating of culture surfaces with ECM proteins normally present in the marrow microenvironment could benefit the ex vivo expansion of HPCs. Towards this, collagen types I and IV (COL I and IV), laminin (LN) and fibronectin (FN) were tested individually or as component of two ECM-mix complexes. Individually, ECM proteins had both common and unique properties on the growth and differentiation of UCB CD34+ cells; some ECM proteins favoured the differentiation of some lineages over that of others (e.g. FN for erythroids), some the expansion of HPCs (e.g. LN and megakaryocyte (MK) progenitor) while others had less effects. Next, two ECM-mix complexes were tested; the first one contained all four ECM proteins (4ECMp), while the second 'basement membrane-like structure' was without COL I (3ECMp). Removal of COL I led to strong reductions in cell growth and HPCs expansion. Interestingly, the 4ECMp-mix complex reproducibly increased CD34+ (1.3-fold) and CD41+ (1.2-fold) cell expansions at day 6 (P < 0.05) versus control, and induced greater myeloid progenitor expansion (P < 0.05) than 3ECMp. In conclusion, these results suggest that optimization of BM ECM protein complexes could provide a better environment for the ex vivo expansion of haematopoietic progenitors than individual ECM protein.
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Affiliation(s)
- Betül Celebi
- Hema-Quebec, Research & Development Department, Quebec City, PQ, Canada
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Pelus LM, Hoggatt J. Pleiotropic effects of prostaglandin E2 in hematopoiesis; prostaglandin E2 and other eicosanoids regulate hematopoietic stem and progenitor cell function. Prostaglandins Other Lipid Mediat 2011; 96:3-9. [PMID: 21722751 DOI: 10.1016/j.prostaglandins.2011.06.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2011] [Revised: 06/13/2011] [Accepted: 06/14/2011] [Indexed: 12/26/2022]
Abstract
Eicosanoids have been implicated in the physiological regulation of hematopoiesis with pleiotropic effects on hematopoietic stem cells and various classes of lineage restricted progenitor cells. Herein we review the effects of eicosanoids on hematopoiesis, focusing on new findings implicating prostaglandin E(2) in enhancing hematopoietic stem cell engraftment by enhancing stem cell homing, survival and self-renewal. We also describe a role for cannabinoids in hematopoiesis. Lastly, we discuss the yin and yang of various eicosanoids in modulating hematopoietic stem and progenitor cell functions and summarize potential strategies to take advantage of these effects for therapeutic benefit for hematopoietic stem cell transplantation.
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Affiliation(s)
- Louis M Pelus
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
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Shen XZ, Bernstein KE. The peptide network regulated by angiotensin converting enzyme (ACE) in hematopoiesis. Cell Cycle 2011; 10:1363-9. [PMID: 21441775 DOI: 10.4161/cc.10.9.15444] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The concept of a local bone marrow renin-angiotensin system (RAS) has been introduced and accumulating evidence suggests that the local RAS is actively involved in hematopoiesis. Angiotensin converting enzyme (ACE) is a key player in the RAS and makes the final effector angiotensin II. Besides angiotensin II, ACE also regulates a panel of bioactive peptides, such as substance P, Ac-SDKP and angiotensin 1-7. These peptides have also been individually reported in the regulation of pathways of hematopoiesis. In this setting, an ACE-regulated peptide network orchestrating hematopoiesis has emerged. Here, we focus on this peptide network and discuss the roles of ACE and its peptides in aspects of hematopoiesis. Special attention is given to the recent revelation that ACE is a bona fide marker of hematopoietic stem cells.
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Affiliation(s)
- Xiao Z Shen
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA.
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