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Activated Monocytes Enhance Platelet-Driven Contraction of Blood Clots via Tissue Factor Expression. Sci Rep 2017; 7:5149. [PMID: 28698680 PMCID: PMC5506001 DOI: 10.1038/s41598-017-05601-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 05/31/2017] [Indexed: 01/13/2023] Open
Abstract
Platelet-driven reduction in blood clot volume (clot contraction or retraction) has been implicated to play a role in hemostasis and thrombosis. Although these processes are often linked with inflammation, the role of inflammatory cells in contraction of blood clots and thrombi has not been investigated. The aim of this work was to study the influence of activated monocytes on clot contraction. The effects of monocytes were evaluated using a quantitative optical tracking methodology to follow volume changes in a blood clot formed in vitro. When a physiologically relevant number of isolated human monocytes pre-activated with phorbol-12-myristate-13-acetate (PMA) were added back into whole blood, the extent and rate of clot contraction were increased compared to addition of non-activated cells. Inhibition of tissue factor expression or its inactivation on the surface of PMA-treated monocytes reduced the extent and rate of clot contraction back to control levels with non-activated monocytes. On the contrary, addition of tissue factor enhanced clot contraction, mimicking the effects of tissue factor expressed on the activated monocytes. These data suggest that the inflammatory cells through their expression of tissue factor can directly affect hemostasis and thrombosis by modulating the size and density of intra- and extravascular clots and thrombi.
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Lakbakbi S, Debrumetz A, Terryn C, Szymezak J, Rieu P, Nguyen P. Tissue factor expressed by adherent cells contributes to hemodialysis-membrane thrombogenicity. Thromb Res 2016; 144:218-23. [DOI: 10.1016/j.thromres.2016.05.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 04/27/2016] [Accepted: 05/18/2016] [Indexed: 10/21/2022]
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Lakbakbi S, Debrumetz A, Rieu P, Nguyen P. Human Neutrophils Support Thrombin Generation in Peritonitis. Perit Dial Int 2015; 35:599-602. [PMID: 26450485 DOI: 10.3747/pdi.2014.00187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Souad Lakbakbi
- Université de Reims, EA3801 HERVI, UFR Médecine, Reims, France
| | | | - Philippe Rieu
- Nephrology, Hôpital Maison Blanche, CHU de Reims, Reims, France
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Velard F, Schlaubitz S, Fricain JC, Guillaume C, Laurent-Maquin D, Möller-Siegert J, Vidal L, Jallot E, Sayen S, Raissle O, Nedelec JM, Vix-Guterl C, Anselme K, Amédée J, Laquerrière P. In vitro and in vivo evaluation of the inflammatory potential of various nanoporous hydroxyapatite biomaterials. Nanomedicine (Lond) 2015; 10:785-802. [DOI: 10.2217/nnm.15.12] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Aim: To discriminate the most important physicochemical parameters for bone reconstruction, the inflammatory potential of seven nanoporous hydroxyapatite powders synthesized by hard or soft templating was evaluated both in vitro and in vivo. Materials & methods: After physical and chemical characterization of the powders, we studied the production of inflammatory mediators by human primary monocytes after 4 and 24 h in contact with powders, and the host response after 2 weeks implantation in a mouse critical size defect model. Results: In vitro results highlighted increases in the secretion of TNF-α, IL-1, -8, -10 and proMMP-2 and -9 and decreases in the secretion of IL-6 only for powders prepared by hard templating. In vivo observations confirmed an extensive inflammatory tissue reaction and a strong resorption for the most inflammatory powder in vitro. Conclusion: These findings highlight that the most critical physicochemical parameters for these nanoporous hydroxyapatite are, the crystallinity that controls dissolution potential, the specific surface area and the size and shape of crystallites.
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Affiliation(s)
- Frédéric Velard
- EA 4691 Biomatériaux & inflammation en site osseux, SFR CAP-Santé (FED 4231), Université de Reims-Champagne-Ardenne, UFR Odontologie, 51 rue Cognacq Jay, 51095 Reims, Cedex, France
| | - Silke Schlaubitz
- INSERM UMR-S1026, Bioingénierie Tissulaire, Université Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France
- CHU de Bordeaux, CIC, PTIB Hôpital Xavier Arnozan, Avenue du Haut Lévêque, 33000 Bordeaux, France
| | - Jean-Christophe Fricain
- INSERM UMR-S1026, Bioingénierie Tissulaire, Université Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Christine Guillaume
- EA 4691 Biomatériaux & inflammation en site osseux, SFR CAP-Santé (FED 4231), Université de Reims-Champagne-Ardenne, UFR Odontologie, 51 rue Cognacq Jay, 51095 Reims, Cedex, France
| | - Dominique Laurent-Maquin
- EA 4691 Biomatériaux & inflammation en site osseux, SFR CAP-Santé (FED 4231), Université de Reims-Champagne-Ardenne, UFR Odontologie, 51 rue Cognacq Jay, 51095 Reims, Cedex, France
| | - Janina Möller-Siegert
- IS2M, CNRS UMR7361, Université de Haute-Alsace, 15 rue Jean Starcky, BP 2488, 68057 Mulhouse Cedex, France
| | - Loïc Vidal
- IS2M, CNRS UMR7361, Université de Haute-Alsace, 15 rue Jean Starcky, BP 2488, 68057 Mulhouse Cedex, France
| | - Edouard Jallot
- CNRS/IN2P3, UMR 6533, Laboratoire de Physique Corpusculaire de Clermont-Ferrand, Université Blaise Pascal, 24 avenue des Landais, 63177 Aubiere Cedex, France
| | - Stéphanie Sayen
- Institut de Chimie Moléculaire de Reims (ICMR, UMR CNRS 7312), Groupe Chimie de Coordination, Université de Reims Champagne-Ardenne, 51687 Reims Cedex 2, France
| | - Olivier Raissle
- CNRS, UMR 6296, Clermont Université, ENSCCF, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont- Ferrand, France
| | - Jean-Marie Nedelec
- CNRS, UMR 6296, Clermont Université, ENSCCF, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont- Ferrand, France
| | - Cathie Vix-Guterl
- IS2M, CNRS UMR7361, Université de Haute-Alsace, 15 rue Jean Starcky, BP 2488, 68057 Mulhouse Cedex, France
| | - Karine Anselme
- IS2M, CNRS UMR7361, Université de Haute-Alsace, 15 rue Jean Starcky, BP 2488, 68057 Mulhouse Cedex, France
| | - Joëlle Amédée
- INSERM UMR-S1026, Bioingénierie Tissulaire, Université Bordeaux, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Patrice Laquerrière
- CNRS UMR 7178, Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Fédération de Médecine Translationnelle de Strasbourg, 23 rue de Loess, 67037 Strasbourg Cedex, France
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Induction of IL-12 production in human peripheral monocytes by Trypanosoma cruzi Is mediated by glycosylphosphatidylinositol-anchored mucin-like glycoproteins and potentiated by IFN- γ and CD40-CD40L interactions. Mediators Inflamm 2014; 2014:345659. [PMID: 25120285 PMCID: PMC4120781 DOI: 10.1155/2014/345659] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 06/16/2014] [Indexed: 12/04/2022] Open
Abstract
Chagas disease, caused by the protozoan parasite Trypanosoma cruzi (T. cruzi), is characterized by immunopathology driven by IFN-γ secreting Th1-like T cells. T. cruzi has a thick coat of mucin-like glycoproteins covering its surface, which plays an important role in parasite invasion and host immunomodulation. It has been extensively described that T. cruzi or its products—like GPI anchors isolated from GPI-anchored mucins from the trypomastigote life cycle stage (tGPI-mucins)—are potent inducers of proinflammatory responses (i.e., cytokines and NO production) by IFN-γ primed murine macrophages. However, little is known about whether T. cruzi or GPI-mucins exert a similar action in human cells. We therefore decided to further investigate the in vitro cytokine production profile from human mononuclear cells from uninfected donors exposed to T. cruzi as well as tGPI-mucins. We observed that both living T. cruzi trypomastigotes and tGPI-mucins are potent inducers of IL-12 by human peripheral blood monocytes and this effect depends on CD40-CD40L interaction and IFN-γ. Our findings suggest that the polarized T1-type cytokine profile seen in T. cruzi infected patients might be a long-term effect of IL-12 production induced by lifelong exposure to T. cruzi tGPI-mucins.
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Grosse J, Meier K, Bauer TJ, Eilles C, Grimm D. Cell separation by countercurrent centrifugal elutriation: recent developments. Prep Biochem Biotechnol 2012; 42:217-33. [PMID: 22509848 DOI: 10.1080/10826068.2011.602799] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Countercurrent centrifugal elutriation (CCE) is a cell separation technique that separates particles predominantly according to their size, and to some degree according to their specific density, without a need for antibodies or ligands tagging cell surfaces. The principles of this technique have been known for half a century. Still, numerous recent publications confirmed that CCE is a valuable supplement to current cell separation technology. It is mainly applied when homogeneous populations of cells, which mirror an in vivo situation, are required for answering scientific questions or for clinical transplantation, while antibodies or ligands suitable for cell isolation are not available. Currently, new technical developments are expanding its application toward fractionation of healthy and malignant tissue cells and the preparation of dendritic cells for immunotherapy.
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Affiliation(s)
- Jirka Grosse
- Department of Nuclear Medicine, University of Regensburg, Regensburg, Germany
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Buache E, Velard F, Bauden E, Guillaume C, Jallot E, Nedelec J, Laurent-Maquin D, Laquerriere P. Effect of strontium-substituted biphasic calcium phosphate on inflammatory mediators production by human monocytes. Acta Biomater 2012; 8:3113-9. [PMID: 22579711 DOI: 10.1016/j.actbio.2012.04.045] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Revised: 03/27/2012] [Accepted: 04/30/2012] [Indexed: 10/28/2022]
Abstract
Calcium phosphate materials are widely used as bone substitutes because of their properties close to those of the mineral phase of bones. Nevertheless, after several months, calcium phosphate-based materials release particles that may be phagocytosed by monocytes, leading to an inflammatory reaction. Strontium is well known to counteract the osteoporosis process, but little is known about its effect on inflammatory processes. The purpose of this work was to study the effect of biphasic calcium phosphate (BCP) particles substituted with strontium on the inflammatory reaction. Human primary monocytes stimulated or not by lipopolysaccharide (LPS) were exposed to BCP particles containing strontium for 6 and 24 h. Inflammatory mediators (cytokines and matrix metalloproteinases (MMPs)) production was then quantified by ELISA and zymography. We observed that the presence of strontium had few effects on unstimulated cells, but it decreased the production of pro-inflammatory cytokines and the chemokine interleukin 8 in LPS-stimulated cell-conditioned medium. This work suggests for the first time that strontium may be involved in the control of inflammatory processes following BCP phagocytosis by human monocytes.
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Broze GJ, Girard TJ. Tissue factor pathway inhibitor: structure-function. Front Biosci (Landmark Ed) 2012; 17:262-80. [PMID: 22201743 DOI: 10.2741/3926] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
TFPI is a multivalent, Kunitz-type proteinase inhibitor, which, due to alternative mRNA splicing, is transcribed in three isoforms: TFPIalpha, TFPIdelta, and glycosyl phosphatidyl inositol (GPI)-anchored TFPIbeta. The microvascular endothelium is thought to be the principal source of TFPI and TFPIalpha is the predominant isoform expressed in humans. TFPIalpha, apparently attached to the surface of the endothelium in an indirect GPI-anchor-dependent fashion, represents the greatest in vivo reservoir of TFPI. The Kunitz-2 domain of TFPI is responsible for factor Xa inhibition and the Kunitz-1 domain is responsible for factor Xa-dependent inhibition of the factor VIIa/tissue factor catalytic complex. The anticoagulant activity of TFPI in one-stage coagulation assays is due mainly to its inhibition of factor Xa through a process that is enhanced by protein S and dependent upon the Kunitz-3 and carboxyterminal domains of full-length TFPIalpha. Carboxyterminal truncated forms of TFPI as well as TFPIalpha in plasma, however, inhibit factor VIIa/tissue factor in two-stage assay systems. Studies in gene-disrupted mice demonstrate the physiological importance of TFPI.
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Affiliation(s)
- George J Broze
- Division of Hematology, Washington University School of Medicine, St. Louis, MO 63110, USA.
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10
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Differential coagulation inhibitory effect of fondaparinux, enoxaparin and unfractionated heparin in cell models of thrombin generation. Blood Coagul Fibrinolysis 2011; 22:369-73. [PMID: 21577096 DOI: 10.1097/mbc.0b013e328344f7d0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Anticoagulants, including unfractionated heparin (UFH), enoxaparin and fondaparinux, are approved drugs in acute coronary syndrome (ACS). Monocytes and monocyte-derived microparticles (MMPs) play an important procoagulant role in ACS by expressing high tissue factor (TF) levels, which in turn triggers thrombin generation. The objective of our study is to compare the in-vitro inhibitory effect of UFH, enoxaparin and fondaparinux in monocytes and MMP models. Human-elutriated monocytes were activated for 5 and 18 h by lipopolysaccharide to obtain activated monocytes (ac-M) or MMPs, respectively. Thrombin generation inhibition was assessed using ac-M or MMPs mixed with platelet-poor plasma containing increased concentrations of anticoagulants. Thrombin generation inhibition was dose-dependent with a differential effect according to the drug: the highest for UFH, the lowest for fondaparinux. Rate index was the most sensitive parameter. For fondaparinux, its IC50 values (anti-Xa IU/ml) were 0.59±0.05 for ac-M and 0.17±0.03 for MMPs. For enoxaparin, rate index IC50 values were 0.27±0.03 for ac-M and 0.19±0.02 for MMPs. Our data support the notion that cell-induced thrombin generation assay may be a reliable alternative to anti-Xa assessment in determining patient anticoagulation level.
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Basavaraj MG, Gruber FX, Sovershaev M, Appelbom HI, Østerud B, Petersen LC, Hansen JB. The role of TFPI in regulation of TF-induced thrombogenicity on the surface of human monocytes. Thromb Res 2010; 126:418-25. [DOI: 10.1016/j.thromres.2010.07.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 07/04/2010] [Accepted: 07/19/2010] [Indexed: 10/19/2022]
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Differential inhibitory effect of fondaparinux on the procoagulant potential of intact monocytes and monocyte-derived microparticles. J Thromb Thrombolysis 2010; 30:412-8. [DOI: 10.1007/s11239-010-0490-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Poitevin S, Garnotel R, Antonicelli F, Gillery P, Nguyen P. Type I collagen induces tissue factor expression and matrix metalloproteinase 9 production in human primary monocytes through a redox-sensitive pathway. J Thromb Haemost 2008; 6:1586-94. [PMID: 18541003 DOI: 10.1111/j.1538-7836.2008.03051.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Tissue factor (TF), the main trigger of coagulation cascade, is a major component of the atherosclerotic plaque. Matrix metalloproteinases (MMPs) are recognized as key mediators of extracellular matrix remodeling during inflammation. It was recently emphasized that both TF and MMP-9 were overexpressed in atherosclerotic plaques, suggesting a role of both molecules in plaque instability and thrombogenicity. OBJECTIVE The present study was designed to determine whether human monocytes could co-express TF and MMP-9 when the cells interact with type I collagen, a major component of the extracellular matrix and atherosclerotic plaque. METHODS Human monocytes were isolated by elutriation and incubated in collagen I-coated plates. Tissue factor and MMP-9 expression were examined using real-time reverse transcription-polymerase chain reaction, flow cytometry, western blot and zymography. The activation of nuclear factor-kappa B (NF-kappaB) and the role of reactive oxygen species (ROS) in TF and MMP-9 production was studied using gel shift experiments, antioxidants pyrrolidine dithiocarbamate (PDTC) and N-acetyl-cysteine (NAC), and apocynin (a specific inhibitor of the NADPH oxidase). RESULTS Type I collagen induced TF expression and increased MMP-9 production. In addition, the pro-inflammatory tumor necrosis factor-alpha (TNF-alpha), produced in response to collagen I, increased MMP-9 production. PDTC and NAC inhibited NF-kappaB activation during monocyte interaction with collagen I. Finally, both antioxidants and apocynin decreased the expression of TF, TNF-alpha, and MMP-9. CONCLUSIONS These results indicate a new mechanism in the monocyte expression of TF and MMP-9 in response to collagen I involving a ROS-dependent pathway linked to the activation of the NADPH oxidase.
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Affiliation(s)
- S Poitevin
- EA3801, URCA and Laboratory of Haematology, CHU Robert Debré, Reims, France
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Lin YF, Zhang N, Guo HS, Kong DS, Jiang T, Liang W, Zhao ZH, Tang QQ, Ma D. Recombinant tissue factor pathway inhibitor induces apoptosis in cultured rat mesangial cells via its Kunitz-3 domain and C-terminal through inhibiting PI3-kinase/Akt pathway. Apoptosis 2007; 12:2163-73. [PMID: 17885802 DOI: 10.1007/s10495-007-0136-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Tissue factor pathway inhibitor (TFPI) is an endogenous inhibitor of tissue factor (TF) induced coagulation. In addition to its anticoagulation activity, TFPI has other functions such as antiproliferation and inducing apoptosis. In the present study, we investigated whether or not TFPI induced apoptosis in cultured rat mesangial cells (MsCs) and the possible signal pathway that involved in the apoptotic process. We demonstrated that recombinant TFPI (rTFPI) induced apoptosis in cultured MsCs via its Kunitz-3 domain and C-terminal in a dose- and time-dependent manner by Hoechst 33258 assay, flow cytometry, nucleosomal laddering of DNA, caspase 3 assay. Because the serine/threonine protein kinase Akt has attracted attention as a mediator of survival (anti-apoptotic) signal in MsCs, we investigated the expression of phosphospecific-Akt and its downstream signal phospho-IkappaB-alpha and some other signal molecules like Fas and bcl-2. The results indicated that the process of apoptosis triggered by rTFPI is, at least in part, actively conducted by rat MsCs possibly through PI3-Kinase-Akt signal pathway not by binding to tissue factor. Our findings suggest that rTFPI has the potential usefulness in inducing apoptosis of MsCs under inflammatory conditions.
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Affiliation(s)
- Yi-feng Lin
- Department of Pathology, Shanghai Medical College, Fudan University, Shanghai 200032, China
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Bajaj MS, Ghosh M, Bajaj SP. Fibronectin-adherent monocytes express tissue factor and tissue factor pathway inhibitor whereas endotoxin-stimulated monocytes primarily express tissue factor: physiologic and pathologic implications. J Thromb Haemost 2007; 5:1493-9. [PMID: 17470199 DOI: 10.1111/j.1538-7836.2007.02604.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Monocytes are critical cells in initiating physiologic and/or pathologic tissue factor (TF)-induced intravascular and extravascular coagulation. Monocytes constitutively express small amounts of TF and tissue factor pathway inhibitor (TFPI). Non-adherent lipopolysaccharide (LPS)-stimulated monocytes express significant amounts of TF; however, increased expression of TFPI by these cells is controversial. Further, whether fibronectin-adherent monocytes (mimicking conditions in the extravascular space) express sufficient TFPI to inhibit TF-procoagulant activity (PCA) is unknown. OBJECTIVE To compare TF and TFPI expression by fibronectin-adherent and LPS-stimulated non-adherent monocytes. METHODS Monocytes were isolated from normal peripheral blood, adhered to fibronectin or stimulated with lipopolysaccharide (LPS) under non-adherent conditions and examined for expression of TF and TFPI using quantitative real-time reverse transcription-polymerase chain reaction (RT-PCR), ELISA and factor X (FX) activation. RESULTS Under LPS-free conditions, the fibronectin-adherent monocyte TF mRNA, antigen and activity were markedly upregulated. Notably, cell and microparticle (MP)-associated TF and alternatively spliced TF (asTF) were all upregulated. TFPI mRNA and antigen were also upregulated in the fibronectin-adherent monocytes, which significantly inhibited TF-PCA. TFPI mRNAs for both alpha and beta forms were detected. The peak in TFPI activity occurred in tandem with the peak in TF-PCA. In contrast, LPS-stimulated monocytes, which expressed cell and MP-associated TF and asTF, demonstrated only minimal expression of TFPI as determined by mRNA, antigen or inhibition of TF activity. CONCLUSION Both LPS-stimulated and fibronectin-adherent monocytes demonstrate a procoagulant phenotype by expressing TF but only fibronectin-adherent monocytes express significant amounts of TFPI to control thrombin generation and fibrin formation in the context of extravascular space.
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Affiliation(s)
- M S Bajaj
- Department of Medicine, David Geffen School of Medicine, and UCLA/Orthopedic Hospital, Los Angeles, CA 90095-1690, USA.
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de Carvalho CM, Bonnefont-Rebeix C, Picandet S, Bernaud J, Phothirath P, Chabanne L, Marchal T, Magnol JP, Rigal D. Evaluation of elutriation and magnetic microbead purification of canine monocytes. Vet Immunol Immunopathol 2004; 101:171-8. [PMID: 15350747 DOI: 10.1016/j.vetimm.2004.04.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2003] [Revised: 03/22/2004] [Accepted: 04/07/2004] [Indexed: 11/21/2022]
Abstract
An elutriation technique was developed to obtain large quantities of pure canine monocytes. Firstly, peripheral blood mononuclear cells (PBMC) were isolated from whole blood by Ficoll gradient. Then, the PBMC were separated by an elutriation procedure. We demonstrated that these techniques allow the isolation of canine peripheral blood monocytes with a purity of 64% +/- 7.9 when labelled with anti-CD14 antibody. This purity increased to 83% +/- 2.2 after separation by magnetic anti-CD14 microbeads. The cell viability was more than 95% and apoptotic cells were less than 10%. The monocytes purified by these methods were functionally active in a mixed leukocyte reaction (MLR). A lymphocyte fraction was obtained directly only by elutriation with an average of 79.9% +/- 10.7 of CD5+, 7.9% +/- 3.5 of CD21+ and 1.78% +/- 2.53 of CD14+. Our results indicate that this elutriation procedure is a safe method to purify monocytes as well as lymphocytes, useful in MLR.
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Laquerriere P, Grandjean-Laquerriere A, Guenounou M, Laurent-Maquin D, Frayssinet P, Nardin M. Correlation between sintering temperature of hydroxyapatite particles and the production of inflammatory cytokines by human monocytes. Colloids Surf B Biointerfaces 2003. [DOI: 10.1016/s0927-7765(03)00083-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Laquerriere P, Grandjean-Laquerriere A, Jallot E, Balossier G, Frayssinet P, Guenounou M. Importance of hydroxyapatite particles characteristics on cytokines production by human monocytes in vitro. Biomaterials 2003; 24:2739-47. [PMID: 12711520 DOI: 10.1016/s0142-9612(03)00089-9] [Citation(s) in RCA: 119] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Calcium phosphate bioceramics have been applied as bone substitutes for several decades. Aseptic loosening after total joint arthroplasty is a major problem in orthopaedic surgery. Hydroxyapatite particles from materials wear have been reported as the main cause of implant failure. For this reason, an investigation into possible wear particles from materials used in the implant may lead to longevity after arthroplasty. Monocytes are among the first cells to colonize the inflammatory site. In the present study, we have evaluated the inflammatory response after exposition to particles with different characteristics (size, sintering temperature and shape). Our data demonstrate that the most important characteristic was the shape and the size of the particles. The needle shaped particles induced the larger production of TNF-alpha, IL-6 and IL-10 by cells. To a less manner, the smallest particles induced an increase of the expression and production of the cytokines studied (TNF-alpha, IL-6 and IL-10). The sintering temperature appeared to be a less important characteristic even though it was involved in the dissolution/precipitation process.
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Affiliation(s)
- Patrice Laquerriere
- Laboratoire de Micoscopie Electronique, UFR Sciences, IFR 53, 21 rue Clément Ader, BP 138, 51685 Reims Cedex 2, France.
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Mirshahi F, Vasse M, Tedgui A, Li H, Merval R, Legrand E, Vannier JP, Soria J, Soria C. Oncostatin M induces procoagulant activity in human vascular smooth muscle cells by modulating the balance between tissue factor and tissue factor pathway inhibitor. Blood Coagul Fibrinolysis 2002; 13:449-55. [PMID: 12138373 DOI: 10.1097/00001721-200207000-00010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Oncostatin M (OSM) is a cytokine of the interleukin-6 (IL-6) family secreted by activated monocytes, and is expressed in atherosclerotic plaque. Smooth muscle cells (SMC), by expressing tissue factor (TF) and tissue factor pathway inhibitor (TFPI) can contribute to the thrombogenicity of atherosclerotic plaque. Consequently, the aim of this study was to evaluate the effects of OSM on the procoagulant activity of SMC. We observed that OSM induced in a concentration-dependent manner a potent procoagulant activity (PCA) that was related in part to an increased synthesis of TF, both at the cell membrane and in SMC lysates. The increased expression of TF on SMC membrane induced by OSM was sustained and was still observed 24 h after stimulation by OSM. IL-6 and leukaemia inhibitory factor (LIF), two OSM-related cytokines, did not significantly modify TF expression at the surface of SMC. In addition to its effects on TF, OSM decreased the secretion of TFPI in the supernatants of SMC, as well as in the lysates, but was devoid of effect on TFPI bound at the membrane of SMC. IL-6 and LIF reduced also TFPI secretion, which could explain why the PCA of SMC lysates treated by IL-6 or LIF was increased, despite an absence of effect on TF expression. In conclusion, these data support the hypothesis that by increasing the PCA of SMC, OSM might be involved in the thrombotic complications associated with plaque rupture.
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Affiliation(s)
- F Mirshahi
- Laboratoire DIFEMA, UFR de Médecine et Pharmacie de Rouen, Rouen, France
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Kato H. Regulation of functions of vascular wall cells by tissue factor pathway inhibitor: basic and clinical aspects. Arterioscler Thromb Vasc Biol 2002; 22:539-48. [PMID: 11950688 DOI: 10.1161/01.atv.0000013904.40673.cc] [Citation(s) in RCA: 121] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Tissue factor pathway inhibitor (TFPI) is a Kunitz-type protease inhibitor that inhibits the initial reactions of blood coagulation. A major pool of TFPI is the form associated with the surface of endothelial cells, which is speculated to play an important role in regulating the functions of vascular wall cells. TFPI consists of 3 tandem Kunitz inhibitor domains, the first and second of which inhibit the tissue factor-factor VIIa complex and factor Xa, respectively. Recent findings indicate that TFPI has another function, ie, the modulation of cell proliferation. This function is based on the interaction of the C-terminal region of TFPI with these cells. In addition to endothelial cells, it has been shown that many other vascular wall cells can synthesize TFPI, eg, mesangial cells, smooth muscle cells, monocytes, fibroblasts, and cardiomyocytes. TFPI is associated with these cells mainly through heparan sulfate proteoglycans on their surface. However, recent findings suggest that there are several other candidates for TFPI-binding proteins on these cells. On the other hand, studies on plasma levels of TFPI in patients with various diseases suggest that TFPI may be a marker of endothelial cell dysfunction. An increasing number of reports suggest that recombinant TFPI may attenuate thrombosis and prevent restenosis. Clinical trials are needed to explore these possibilities. Recent reports also indicate that the application of recombinant TFPI or TFPI gene transfer prevents restenosis in addition to thrombosis after arterial injury in the animal model; corroboration of these reports awaits clinical investigation.
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Affiliation(s)
- Hisao Kato
- National Cardiovascular Center Research Institute, Suita, Osaka, Japan.
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Broussas M, Cornillet-Lefebvre P, Bernard J, Adjizian JC, Potron G, Nguyên P. Separation of dendritic cells from highly purified human monocytes by counterflow centrifugation induces tissue factor expression. Transfusion 2000; 40:1088-94. [PMID: 10988312 DOI: 10.1046/j.1537-2995.2000.40091088.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND In vitro generation of dendritic cells (DCs) from human monocytes represents a promising tool in immunotherapy. However, it is not known whether the separation of DCs from monocytes induces tissue factor expression and therefore may trigger coagulation in patients receiving these DC preparations. The aim of this study is thus to analyze tissue factor expression on monocyte-derived DCs and to compare their ability to trigger thrombin generation to that of macrophages obtained from the same monocytes. STUDY DESIGN AND METHODS Human monocytes are separated by leukapheresis and washed by using counterflow centrifugation in sterile, endotoxin-free conditions. Macrophages are grown from human monocytes in the presence of GM-CSF alone and immature DCs are grown in the presence of GM-CSF plus IL-4 for 5 days with fetal calf serum (IDC-FCS). Immature DCs are also grown from human monocytes for 7 days in the presence of GM-CSF plus IL-4 with human group AB serum (IDC-HS). The addition of prostaglandin E(2) and TNFalpha in this culture medium at Day 5 leads to mature DCs (MDC-HS). Tissue factor mRNA expression is studied by RT-PCR analysis. Tissue factor antigen is measured by ELISA in cell lysates and by direct flow cytometry. The procoagulant activity of intact cells is assessed by using an amidolytic assay or a chronometric assay. RESULTS IDC-FCS express tissue factor mRNA and antigen and trigger thrombin generation. Procoagulant activity of IDC-FCS is dependent on both tissue factor expression and exposure to anionic phospholipid. Monocyte-derived macrophages cultured for 5 days with GM-CSF alone express lower levels of tissue factor mRNA, tissue factor antigen, and procoagulant activity than IDC-FCS. IDC-HS and MDC-HS also express high levels of tissue factor mRNA and antigen and support procoagulant activity. CONCLUSION Monocyte-derived DCs express a high level of functional tissue factor and support procoagulant activity. This finding should be taken into account in clinical trials.
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Affiliation(s)
- M Broussas
- Central Hematology Laboratory, University of Reims Medical Center, Reims, France
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