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Zhou YT, Yu YQ, Yang H, Yang H, Huo YF, Huang Y, Tian XX, Fang WG. Extracellular ATP promotes angiogenesis and adhesion of TNBC cells to endothelial cells via up-regulation of CTGF. Cancer Sci 2022; 113:2457-2471. [PMID: 35441763 PMCID: PMC9277410 DOI: 10.1111/cas.15375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 04/07/2022] [Accepted: 04/12/2022] [Indexed: 12/01/2022] Open
Abstract
Our previous works have indicated that extracellular ATP is an important prometastasis factor. However, the molecular mechanism involved needs to be further studied. We demonstrated that extracellular ATP treatment could upregulate the expression of connective tissue growth factor (CTGF) in both triple‐negative breast cancer (TNBC) cells and endothelial cells (ECs). Extracellular ATP stimulated the migration of TNBC cells and ECs, and angiogenesis of ECs via the P2Y2––YAP‐CTGF axis. Furthermore, we demonstrated that adenosine triphosphate (ATP) stimulated TNBC cell adhesion to ECs and transmigration through the EC layer via CTGF by upregulation of integrin β1 on TNBC cells and VCAM‐1 on ECs. Both apyrase (ATP‐diphosphohydrolase) and CTGF shRNA treatments could inhibit the metastasis of inoculated tumors to lung and liver in a mouse model, and these treated tumors had fewer blood vessels. Collectively, our data indicated that extracellular ATP promotes tumor angiogenesis and the interactions between TNBC cells and ECs through upregulation of CTGF, thereby stimulating TNBC metastasis. The pleiotropic effects of ATP in angiogenesis and cell adhesion suggest that extracellular ATP or CTGF could be an effective target for TNBC therapy.
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Affiliation(s)
- Yan-Ting Zhou
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Yu-Qing Yu
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Hui Yang
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Han Yang
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Yan-Fei Huo
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Yang Huang
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Xin-Xia Tian
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
| | - Wei-Gang Fang
- Department of Pathology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), School of Basic Medical Sciences, Peking University Third Hospital, Peking University Health Science Center, Beijing, 100191, China
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2
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Viryasova GM, Golenkina EA, Galkina SI, Gaponova TV, Romanova YM, Sud'ina GF. Effects of phosphodiester and phosphorothioate ODN2216 on leukotriene synthesis in human neutrophils and neutrophil apoptosis. Biochimie 2016; 125:140-9. [PMID: 27036535 DOI: 10.1016/j.biochi.2016.03.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 03/23/2016] [Indexed: 01/13/2023]
Abstract
Polymorphonuclear leukocytes (PMNLs, neutrophils) play a major role in the initiation and resolution of the inflammatory response, and neutrophil apoptosis is a critical step in resolving inflammation. We examined the effects of oligodeoxynucleotide (ODN) species with different numbers of phosphodiester and phosphorothioate bonds on leukotriene synthesis in PMNLs and on neutrophil apoptosis. Our modifications were based on the well-known ODN2216 molecule (Krug et al., 2001). Treatment of cultured human neutrophils with ODN2216 accelerated apoptosis except in the case of a species with only phosphodiester bonds. The ODNs with poly(g) (phosphorothioate) sequences at both ends and a phosphodiester inner core had maximal effects on leukotriene synthesis in neutrophils and inhibited formation of 5-lipoxygenase metabolites. Addition of phosphodiester and phosphorothioate ODNs to PMNLs produced distinct effects on superoxide and nitric oxide formation: phosphorothioate-containing ODNs concomitantly stimulated production of nitric oxide and superoxide, which may rapidly combine to generate peroxynitrite. Altogether, our results describe strong activation of neutrophil's cellular responses by phosphorothioate ODN2216. We propose that phosphorothioate modification of ODNs represents a potential mechanism of PMNL activation.
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Affiliation(s)
- Galina M Viryasova
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow 119234, Russia
| | - Ekaterina A Golenkina
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow 119234, Russia
| | - Svetlana I Galkina
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow 119234, Russia
| | - Tatjana V Gaponova
- FGBU Hematology Research Centre, Russia Federation Ministry of Public Health, Moscow 125167, Russia
| | - Yulia M Romanova
- Gamaleya Research Institute of Epidemiology and Microbiology, Moscow 123098, Russia
| | - Galina F Sud'ina
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow 119234, Russia.
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3
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Pettengill MA, van Haren SD, Levy O. Soluble mediators regulating immunity in early life. Front Immunol 2014; 5:457. [PMID: 25309541 PMCID: PMC4173950 DOI: 10.3389/fimmu.2014.00457] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 09/08/2014] [Indexed: 12/15/2022] Open
Abstract
Soluble factors in blood plasma have a substantial impact on both the innate and adaptive immune responses. The complement system, antibodies, and anti-microbial proteins and peptides can directly interact with potential pathogens, protecting against systemic infection. Levels of these innate effector proteins are generally lower in neonatal circulation at term delivery than in adults, and lower still at preterm delivery. The extracellular environment also has a critical influence on immune cell maturation, activation, and effector functions, and many of the factors in plasma, including hormones, vitamins, and purines, have been shown to influence these processes for leukocytes of both the innate and adaptive immune systems. The ontogeny of plasma factors can be viewed in the context of a lower effectiveness of immune responses to infection and immunization in early life, which may be influenced by the striking neonatal deficiency of complement system proteins or enhanced neonatal production of the anti-inflammatory cytokine IL-10, among other ontogenic differences. Accordingly, we survey here a number of soluble mediators in plasma for which age-dependent differences in abundance may influence the ontogeny of immune function, particularly direct innate interaction and skewing of adaptive lymphocyte activity in response to infectious microorganisms and adjuvanted vaccines.
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Affiliation(s)
- Matthew Aaron Pettengill
- Department of Medicine, Division of Infectious Diseases, Boston Children's Hospital , Boston, MA , USA ; Harvard Medical School , Boston, MA , USA
| | - Simon Daniël van Haren
- Department of Medicine, Division of Infectious Diseases, Boston Children's Hospital , Boston, MA , USA ; Harvard Medical School , Boston, MA , USA
| | - Ofer Levy
- Department of Medicine, Division of Infectious Diseases, Boston Children's Hospital , Boston, MA , USA ; Harvard Medical School , Boston, MA , USA
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4
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Pettengill M, Robson S, Tresenriter M, Millán JL, Usheva A, Bingham T, Belderbos M, Bergelson I, Burl S, Kampmann B, Gelinas L, Kollmann T, Bont L, Levy O. Soluble ecto-5'-nucleotidase (5'-NT), alkaline phosphatase, and adenosine deaminase (ADA1) activities in neonatal blood favor elevated extracellular adenosine. J Biol Chem 2013; 288:27315-27326. [PMID: 23897810 PMCID: PMC3779727 DOI: 10.1074/jbc.m113.484212] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Extracellular adenosine, a key regulator of physiology and immune cell function that is found at elevated levels in neonatal blood, is generated by phosphohydrolysis of adenine nucleotides released from cells and catabolized by deamination to inosine. Generation of adenosine monophosphate (AMP) in blood is driven by cell-associated enzymes, whereas conversion of AMP to adenosine is largely mediated by soluble enzymes. The identities of the enzymes responsible for these activities in whole blood of neonates have been defined in this study and contrasted to adult blood. We demonstrate that soluble 5′-nucleotidase (5′-NT) and alkaline phosphatase (AP) mediate conversion of AMP to adenosine, whereas soluble adenosine deaminase (ADA) catabolizes adenosine to inosine. Newborn blood plasma demonstrates substantially higher adenosine-generating 5′-NT and AP activity and lower adenosine-metabolizing ADA activity than adult plasma. In addition to a role in soluble purine metabolism, abundant AP expressed on the surface of circulating neonatal neutrophils is the dominant AMPase on these cells. Plasma samples from infant observational cohorts reveal a relative plasma ADA deficiency at birth, followed by a gradual maturation of plasma ADA through infancy. The robust adenosine-generating capacity of neonates appears functionally relevant because supplementation with AMP inhibited whereas selective pharmacologic inhibition of 5′-NT enhanced Toll-like receptor-mediated TNF-α production in neonatal whole blood. Overall, we have characterized previously unrecognized age-dependent expression patterns of plasma purine-metabolizing enzymes that result in elevated plasma concentrations of anti-inflammatory adenosine in newborns. Targeted manipulation of purine-metabolizing enzymes may benefit this vulnerable population.
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Affiliation(s)
- Matthew Pettengill
- Department of Medicine, Division of Infectious Diseases, Boston Children's Hospital, Boston, Massachusetts 02115; Harvard Medical School, Boston, Massachusetts 02115
| | - Simon Robson
- Harvard Medical School, Boston, Massachusetts 02115; Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215
| | - Megan Tresenriter
- Department of Medicine, Division of Infectious Diseases, Boston Children's Hospital, Boston, Massachusetts 02115
| | - José Luis Millán
- Sanford Children's Health Research Center, Sanford-Burnham Medical Research Institute, La Jolla, California 92037
| | - Anny Usheva
- Harvard Medical School, Boston, Massachusetts 02115; Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215
| | - Taiese Bingham
- Department of Medicine, Division of Infectious Diseases, Boston Children's Hospital, Boston, Massachusetts 02115; Harvard Medical School, Boston, Massachusetts 02115
| | - Mirjam Belderbos
- Department of Pediatrics, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands
| | - Ilana Bergelson
- Department of Medicine, Division of Infectious Diseases, Boston Children's Hospital, Boston, Massachusetts 02115
| | - Sarah Burl
- Vaccinology Theme Group, Medical Research Council Unit, Fajara, The Gambia; Department of Pediatrics, Imperial College London, London W2 IPG, United Kingdom
| | - Beate Kampmann
- Vaccinology Theme Group, Medical Research Council Unit, Fajara, The Gambia; Department of Pediatrics, Imperial College London, London W2 IPG, United Kingdom
| | - Laura Gelinas
- Experimental Medicine Program, Department of Medicine
| | - Tobias Kollmann
- Division of Infectious and Immunologic Diseases, Department of Pediatrics, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Louis Bont
- Department of Pediatrics, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands
| | - Ofer Levy
- Department of Medicine, Division of Infectious Diseases, Boston Children's Hospital, Boston, Massachusetts 02115; Harvard Medical School, Boston, Massachusetts 02115.
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Kuravi SJ, Bevins A, Satchell SC, Harper L, Williams JM, Rainger GE, Savage CO, Tull SP. Neutrophil serine proteases mediate inflammatory cell recruitment by glomerular endothelium and progression towards dysfunction. Nephrol Dial Transplant 2012; 27:4331-8. [DOI: 10.1093/ndt/gfs180] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Yokdang N, Tellez JD, Tian H, Norvell J, Barsky SH, Valencik M, Buxton ILO. A role for nucleotides in support of breast cancer angiogenesis: heterologous receptor signalling. Br J Cancer 2011; 104:1628-40. [PMID: 21505453 PMCID: PMC3101911 DOI: 10.1038/bjc.2011.134] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Background: Human breast carcinoma cells secrete an adenosine 5′-diphosphate transphosphorylase (sNDPK) known to induce endothelial cell tubulogenesis in a P2Y receptor-dependent manner. We examined sNDPK secretion and its effects on human endothelial cells. Methods: Nucleoside diphosphate kinase (NDPK) secretion was measured by western blot and enzyme-linked immunosorbent assay, while transphosphorylase activity was measured using the luciferin-luciferase ATP assay. Activation of MAPK was determined by western blot analysis, immunofluorescence and endothelial cell proliferation and migration. Results: A panel of breast cancer cell lines with origin as ductal carcinoma, adenocarcinoma or medullary carcinoma, secrete sNDPK-A/B. Addition of purified NDPK-B to endothelial cultures activated VEGFR-2 and Erk1/2, both of which were blocked by inhibitors of NDPK and P2Y receptors. Activation of VEGFR-2 and ErK1/2 by 2-methylthio-ATP (2MeS-ATP) was blocked by pretreatment with the P2Y1-specific antagonist MRS2179, the proto-oncogene non-receptor tyrosine kinase (Src) inhibitor PP2 or the VEGFR-2 antagonist SU1498. Nucleoside diphosphate kinase-B stimulates cell growth and migration in a concentration-dependent manner comparable to the effect of vascular endothelial growth factor. Treatment of endothelial cells with either NDPK-B or 2MeS-ATP induced migration, blocked by P2Y1, Src or VEGFR-2 antagonists. Conclusion: sNDPK supports angiogenesis. Understanding the mechanism of action of sNDPK and P2Y1 nucleotide signalling in metastasis and angiogenesis represent new therapeutic targets for anti-angiogenic therapies to benefit patients.
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Affiliation(s)
- N Yokdang
- Department of Pharmacology, Centre for Molecular Medicine, University of Nevada School of Medicine, Mail Stop 573, Reno, NV 89557, USA
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7
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Purinergic mechanisms in breast cancer support intravasation, extravasation and angiogenesis. Cancer Lett 2010; 291:131-41. [PMID: 19926395 DOI: 10.1016/j.canlet.2009.09.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2009] [Revised: 09/25/2009] [Accepted: 09/29/2009] [Indexed: 12/30/2022]
Abstract
Several advances have recently expanded models of tumor growth and promoted the concept of tumor homeostasis, the hypothesis that primary tumors exert an anti-proliferative effect on both themselves and subclinical secondary metastases. Recent trials indicate that the characterization of tumor growth as uncontrolled is inconsistent with animal models, clinical models, and epidemiological models. There is a growing body of evidence which lends support to an updated concept of tumor growth: tumor homeostasis. In the case of breast cancer, if not all metastasizing tumors, these advances suggest an inconvenient truth. That is, if breast tumor cells metastasize to distant sites early in the tumorigenesis process, then removal of a breast tumor may hasten the development of its metastases. We explore the heretofore unappreciated notion that nucleotides generated by tumor cells following the secretion of an ADP-kinase can promote metastasis and support angiogenesis. Evidence is presented that blockade of the actions of nucleotides in the setting of newly diagnosed breast cancer may provide a useful adjunct to current anti-angiogenesis treatment.
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8
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Martel-Gallegos G, Rosales-Saavedra MT, Reyes JP, Casas-Pruneda G, Toro-Castillo C, Pérez-Cornejo P, Arreola J. Human neutrophils do not express purinergic P2X7 receptors. Purinergic Signal 2010; 6:297-306. [PMID: 21103213 DOI: 10.1007/s11302-010-9178-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Accepted: 01/28/2010] [Indexed: 02/08/2023] Open
Abstract
It has been reported that in human neutrophils, external ATP activates plasma membrane purinergic P2X(7) receptors (P2X(7)R) to elicit Ca(2+) entry, production of reactive oxygen species (ROS), processing and release of pro-inflammatory cytokines, shedding of adhesion molecules and uptake of large molecules. However, the expression of P2X(7)R at the plasma membrane of neutrophils has also been questioned since these putative responses are not always reproduced. In this work, we used electrophysiological recordings to measure functional responses associated with the activation of membrane receptors, spectrofluorometric measurements of ROS production and ethidium bromide uptake to asses coupling of P2X(7)R activation to downstream effectors, immune-labelling of P2X(7)R using a fluorescein isothiocyanate-conjugated antibody to detect the receptors at the plasma membrane, RT-PCR to determine mRNA expression of P2X(7)R and Western blot to determine protein expression in neutrophils and HL-60 cells. None of these assays reported the presence of P2X(7)R in the plasma membrane of neutrophils and non-differentiated or differentiated HL-60 cells-a model cell for human neutrophils. We concluded that P2X(7)R are not present at plasma membrane of human neutrophils and that the putative physiological responses triggered by external ATP should be reconsidered.
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9
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Aleksandrov DA, Sud’ina GF. Suppression of 5-lipoxygenase activity by anionic cholesterol derivatives. BIOCHEMISTRY MOSCOW-SUPPLEMENT SERIES B-BIOMEDICAL CHEMISTRY 2007. [DOI: 10.1134/s1990750807020114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Bours MJL, Swennen ELR, Di Virgilio F, Cronstein BN, Dagnelie PC. Adenosine 5'-triphosphate and adenosine as endogenous signaling molecules in immunity and inflammation. Pharmacol Ther 2006; 112:358-404. [PMID: 16784779 DOI: 10.1016/j.pharmthera.2005.04.013] [Citation(s) in RCA: 770] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2005] [Accepted: 04/20/2005] [Indexed: 02/07/2023]
Abstract
Human health is under constant threat of a wide variety of dangers, both self and nonself. The immune system is occupied with protecting the host against such dangers in order to preserve human health. For that purpose, the immune system is equipped with a diverse array of both cellular and non-cellular effectors that are in continuous communication with each other. The naturally occurring nucleotide adenosine 5'-triphosphate (ATP) and its metabolite adenosine (Ado) probably constitute an intrinsic part of this extensive immunological network through purinergic signaling by their cognate receptors, which are widely expressed throughout the body. This review provides a thorough overview of the effects of ATP and Ado on major immune cell types. The overwhelming evidence indicates that ATP and Ado are important endogenous signaling molecules in immunity and inflammation. Although the role of ATP and Ado during the course of inflammatory and immune responses in vivo appears to be extremely complex, we propose that their immunological role is both interdependent and multifaceted, meaning that the nature of their effects may shift from immunostimulatory to immunoregulatory or vice versa depending on extracellular concentrations as well as on expression patterns of purinergic receptors and ecto-enzymes. Purinergic signaling thus contributes to the fine-tuning of inflammatory and immune responses in such a way that the danger to the host is eliminated efficiently with minimal damage to healthy tissues.
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Affiliation(s)
- M J L Bours
- Maastricht University, Department of Epidemiology, Nutrition and Toxicology Research Institute Maastricht, P.O. Box 616, 6200 MD Maastricht, The Netherlands.
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11
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Chen WT, Huang WH, Wang D, Yu FC, Chi YC, Wu JC, Wu K, Perng WC, Wu CP, Yan HC. The protective effect of adenosine triphosphate-MgCl2 on ischemia-reperfusion lung injury is leukocyte dependent. J Biomed Sci 2003. [DOI: 10.1007/bf02256324] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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12
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Chu SJ, Chang DM, Wang D, Chen YH, Hsu CW, Hsu K. Fructose-1,6-diphosphate attenuates acute lung injury induced by ischemia-reperfusion in rats. Crit Care Med 2002; 30:1605-9. [PMID: 12130986 DOI: 10.1097/00003246-200207000-00034] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To determine whether fructose-1,6-diphosphate (FDP) pretreatment can attenuate acute lung injury induced by ischemia-reperfusion in our isolated lung model in rats. DESIGN Randomized, controlled study. SETTING Animal care facility procedure room. SUBJECTS Twenty-four adult male Sprague-Dawley rats each weighing 250-350 g. INTERVENTIONS Typical acute lung injury in rats was induced successfully by 10 mins of hypoxia followed by 75 mins of ischemia and 50 mins of reperfusion. Ischemia-reperfusion significantly increased microvascular permeability as measured by the capillary filtration coefficient, lung weight gain, lung weight to body weight ratio, pulmonary arterial pressure, and protein concentration of bronchoalveolar lav-age fluid. MEASUREMENTS AND MAIN RESULTS Pretreatment with FDP significantly attenuated the acute lung injury induced by ischemia-reperfusion as shown by a significant decrease in all of the assessed variables (p <.05 p <.001). The protective effect of FDP was nearly undetectable when promazine (an ecto-adenosine 5-triphosphatase inhibitor) was added before FDP pretreatment. CONCLUSIONS Pretreatment with FDP significantly ameliorates acute lung injury induced by ischemia-reperfusion in rats.
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Affiliation(s)
- Shi-Jye Chu
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China.
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13
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Sud'ina GF, Brock TG, Pushkareva MA, Galkina SI, Turutin DV, Peters-Golden M, Ullrich V. Sulphatides trigger polymorphonuclear granulocyte spreading on collagen-coated surfaces and inhibit subsequent activation of 5-lipoxygenase. Biochem J 2001; 359:621-9. [PMID: 11672437 PMCID: PMC1222184 DOI: 10.1042/0264-6021:3590621] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Sulphatides are sulphate esters of galactocerebrosides that are present on the surfaces of many cell types and act as specific ligands to selectins. The present study was undertaken to investigate the effect of sulphatides on polymorphonuclear granulocyte (PMN) attachment, spreading and 5-lipoxygenase (5-LO) metabolism. Sulphatides, but not non-sulphated galactocerebrosides, dose-dependently enhanced attachment to collagen, as measured by the myeloperoxidase assay. Studies with blocking antibodies indicated that the increased attachment was mediated by CD11b/CD18 (Mac-1) beta 2 integrin. Scanning electron microscopy indicated that sulphatides also greatly enhanced the degree of cell spreading. In PMNs treated in suspension, sulphatides had no effect on the ionophore A23187-stimulated release of arachidonic acid and the synthesis of 5-LO metabolites. In contrast, in PMNs attached to collagen, the enzymic conversion of arachidonic acid by 5-LO was inhibited by sulphatides. Inhibition of 5-LO metabolism by sulphatides was observed even in the presence of exogenous substrate, suggesting that sulphatides directly inhibited 5-LO action. Consistent with this, sulphatides interfered with ionophore-induced translocation of the 5-LO to the nuclear envelope. Substances competing with sulphatide binding to cells, like dextran sulphate, or a strong inhibitor of cell spreading, like the actin-polymerizing agent jasplakinolide, prevented the effects of sulphatides on PMN attachment and spreading and leukotriene synthesis. We conclude that shape changes occurring in response to sulphatides specifically impair PMN leukotriene synthesis by inhibiting translocation of 5-LO.
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Affiliation(s)
- G F Sud'ina
- A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119899, Russia.
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14
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Di Virgilio F, Chiozzi P, Ferrari D, Falzoni S, Sanz JM, Morelli A, Torboli M, Bolognesi G, Baricordi OR. Nucleotide receptors: an emerging family of regulatory molecules in blood cells. Blood 2001; 97:587-600. [PMID: 11157473 DOI: 10.1182/blood.v97.3.587] [Citation(s) in RCA: 573] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Nucleotides are emerging as an ubiquitous family of extracellular signaling molecules. It has been known for many years that adenosine diphosphate is a potent platelet aggregating factor, but it is now clear that virtually every circulating cell is responsive to nucleotides. Effects as different as proliferation or differentiation, chemotaxis, release of cytokines or lysosomal constituents, and generation of reactive oxygen or nitrogen species are elicited upon stimulation of blood cells with extracellular adenosine triphosphate (ATP). These effects are mediated through a specific class of plasma membrane receptors called purinergic P2 receptors that, according to the molecular structure, are further subdivided into 2 subfamilies: P2Y and P2X. ATP and possibly other nucleotides are released from damaged cells or secreted via nonlytic mechanisms. Thus, during inflammation or vascular damage, nucleotides may provide an important mechanism involved in the activation of leukocytes and platelets. However, the cell physiology of these receptors is still at its dawn, and the precise function of the multiple P2X and P2Y receptor subtypes remains to be understood.
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Affiliation(s)
- F Di Virgilio
- Department of Experimental and Diagnostic Medicine, Section of General Pathology and Medical Genetics, and Center of Biotechnology, University of Ferrara, Ferrara, Italy.
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15
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Dzhandzhugazyan KN, Kirkin AF, thor Straten P, Zeuthen J. Ecto-ATP diphosphohydrolase/CD39 is overexpressed in differentiated human melanomas. FEBS Lett 1998; 430:227-30. [PMID: 9688544 DOI: 10.1016/s0014-5793(98)00603-6] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Ecto-ATPase activities of melanocytes and human melanoma cell lines differing in the stage of progression were compared. A dramatic increase in ecto-ATPase activity above the level of normal melanocytes was demonstrated in the differentiated melanomas and was followed by a gradual decrease with tumor progression. The characteristics of this enzymatic activity were consistent with CD39/ecto-ATP diphosphohydrolase (ATPDase) which was found to be the major ecto-ATP-hydrolysing enzyme in melanomas. Indeed, the expression of CD39 and the level of CD39 mRNA followed a similar pattern. Since CD39 is known to regulate homotypic adhesion and, supposedly, affects the disaggregation step, we suggest that overexpression of CD39 may enable tumor cells to reduce contacts with T-lymphocytes and escape from immunological recognition.
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MESH Headings
- Adenosine Triphosphatases
- Antigens, CD/genetics
- Antigens, CD/metabolism
- Apyrase/antagonists & inhibitors
- Apyrase/genetics
- Apyrase/metabolism
- Biomarkers, Tumor/antagonists & inhibitors
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Cell Differentiation
- Cell Line
- Disease Progression
- Enzyme Inhibitors/pharmacology
- Gene Expression Regulation, Enzymologic
- Gene Expression Regulation, Neoplastic
- Humans
- Melanocytes
- Melanoma/enzymology
- Melanoma/genetics
- Melanoma/pathology
- RNA, Messenger/analysis
- RNA, Neoplasm/analysis
- Tumor Cells, Cultured
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Affiliation(s)
- K N Dzhandzhugazyan
- Department of Tumor Cell Biology, Institute of Cancer Biology, Danish Cancer Society, Copenhagen, Denmark
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