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Teixeira JM, Pimentel RM, Abdalla HB, Sousa HMX, Macedo CG, Napimoga MH, Tambeli CH, Oliveira‐Fusaro MCG, Clemente‐Napimoga JT. P2X7‐induced nociception in the temporomandibular joint of rats depends on inflammatory mechanisms and C‐fibres sensitization. Eur J Pain 2021; 25:1107-1118. [DOI: 10.1002/ejp.1732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Juliana M. Teixeira
- Faculdade São Leopoldo Mandic Área de Fisiologia Instituto de Pesquisas São Leopoldo Mandic Campinas Brazil
| | - Rafael M. Pimentel
- Faculdade São Leopoldo Mandic Área de Fisiologia Instituto de Pesquisas São Leopoldo Mandic Campinas Brazil
| | - Henrique B. Abdalla
- Faculdade São Leopoldo Mandic Área de Fisiologia Instituto de Pesquisas São Leopoldo Mandic Campinas Brazil
| | - Hortência M. X. Sousa
- Laboratory of Orofacial Pain Department of Physiology Piracicaba Dental School State University of Campinas (UNICAMP) Piracicaba Brazil
| | - Cristina G. Macedo
- Faculdade São Leopoldo Mandic Área de Fisiologia Instituto de Pesquisas São Leopoldo Mandic Campinas Brazil
| | - Marcelo H. Napimoga
- Faculdade São Leopoldo Mandic Área de Imunologia Instituto de Pesquisas São Leopoldo Mandic Campinas Brazil
| | - Cláudia H. Tambeli
- Department of Structural and Functional Biology Institute of Biology State University of Campinas (UNICAMP) Campinas Brazil
| | - Maria C. G. Oliveira‐Fusaro
- Laboratory of Studies of Pain and Inflammation School of Applied Sciences State University of Campinas (UNICAMP) Limeira São Paulo Brazil
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Vo TS. The role of algal fucoidans in potential anti-allergic therapeutics. Int J Biol Macromol 2020; 165:1093-1098. [PMID: 33031853 DOI: 10.1016/j.ijbiomac.2020.09.252] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/14/2020] [Accepted: 09/29/2020] [Indexed: 12/15/2022]
Abstract
Allergic diseases are among the commonest causes of chronic ill-health and are rapidly rising the prevalence and complexity. Although the current drugs are efficacy for treatment of allergic diseases, however the extensive clinical use of these drugs has led to the diverse and undesirable side effects. Thus, the extensive studies of alternative anti-allergic agents from natural products are essential for a long-term purpose. Marine environment covers a huge source of extremely potential secondary metabolites for drug discovery. Among them, fucoidans from brown seaweeds have been evidenced to possess various biological activities and health benefit effects. Notably, a great deal of interest has been expressed regarding anti-allergic activity of fucoidans. Consequently, this contribution presents an overview of potential anti-allergic therapeutics of fucoidans from brown seaweeds to emphasize its functions in prevention as well as treatment of allergic diseases.
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Affiliation(s)
- Thanh Sang Vo
- Faculty of Food Technology, Thu Dau Mot University, Binh Duong province, Viet Nam.
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Neutrophils contribute to the pathogenesis of hemorrhagic cystitis induced by ifosfamide. Int Immunopharmacol 2018; 62:96-108. [DOI: 10.1016/j.intimp.2018.06.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Revised: 06/15/2018] [Accepted: 06/21/2018] [Indexed: 01/13/2023]
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Kwak JY. Fucoidan as a marine anticancer agent in preclinical development. Mar Drugs 2014; 12:851-70. [PMID: 24477286 PMCID: PMC3944519 DOI: 10.3390/md12020851] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 12/31/2013] [Accepted: 01/10/2014] [Indexed: 12/25/2022] Open
Abstract
Fucoidan is a fucose-containing sulfated polysaccharide derived from brown seaweeds, crude extracts of which are commercially available as nutritional supplements. Recent studies have demonstrated antiproliferative, antiangiogenic, and anticancer properties of fucoidan in vitro. Accordingly, the anticancer effects of fucoidan have been shown to vary depending on its structure, while it can target multiple receptors or signaling molecules in various cell types, including tumor cells and immune cells. Low toxicity and the in vitro effects of fucoidan mentioned above make it a suitable agent for cancer prevention or treatment. However, preclinical development of natural marine products requires in vivo examination of purified compounds in animal tumor models. This review discusses the effects of systemic and local administration of fucoidan on tumor growth, angiogenesis, and immune reaction and whether in vivo and in vitro results are likely applicable to the development of fucoidan as a marine anticancer drug.
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Affiliation(s)
- Jong-Young Kwak
- Department of Biochemistry, School of Medicine and Immune-Network Pioneer Research Center, Dong-A University, 32, Daesingongwon-ro, Seo-gu, Busan 602-714, Korea.
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Abstract
OBJECTIVE The objective of this study was to investigate the potential protective effects of fucoidan, an L- and P-selectin modulator, in 2 murine models of acute pancreatitis. METHODS Acute pancreatitis was induced in mice either by the retrograde infusion of taurolithocholic acid sulfate into the pancreatic duct or by intraperitoneal injections of cerulein (50 μg/kg per hour). The experimental groups received fucoidan (25 mg/kg, intravenously) before pancreatitis induction, whereas control groups received only saline. After 24 hours, serum amylase, lipase, interleukin 1β (IL-1β), tumor necrosis factor α (TNF-α), and nitrite were measured. In addition, myeloperoxidase (MPO) activity (lung and pancreas) and histological assessment (pancreas) were determined. RESULTS Serum amylase, lipase, nitrite, TNF-α, and IL-1β, and pancreatic and lung MPO were increased in both taurolithocholic acid sulfate and cerulein acute pancreatitis compared with the respective control groups. Fucoidan significantly decreased the augmented levels of amylase, lipase, pancreatic and lung MPO, TNF-α, IL-1β, and nitrite in both models. Pancreas histological changes observed in both acute pancreatitis models were significantly attenuated by fucoidan. CONCLUSIONS Fucoidan reduced the severity of acute pancreatitis in mice by decreasing neutrophil infiltration and systemic inflammation, suggesting that modulation of selectins may constitute a promising therapeutic approach.
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Besednova NN, Zaporozhets TS, Makarenkova ID, Kuznetsova TA, Kryzhanoskii SP, Zvyagintseva TN, Mel’nikov VG. Anti-inflammatory effects of sulphated polysaccharides extracted from brown marine algae. ACTA ACUST UNITED AC 2012. [DOI: 10.1134/s2079086412060023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Neuroprotective effect of fucoidin on lipopolysaccharide accelerated cerebral ischemic injury through inhibition of cytokine expression and neutrophil infiltration. J Neurol Sci 2012; 318:25-30. [PMID: 22560605 DOI: 10.1016/j.jns.2012.04.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2011] [Revised: 03/25/2012] [Accepted: 04/11/2012] [Indexed: 11/22/2022]
Abstract
In our previous study, we reported that lipopolysaccharide (LPS) activated microglia and accelerated cerebral ischemic injury in the rat brain through the overexpression of cytokines in microglia. In the present study, we investigated the effect of the intraperitoneal administration of fucoidin, a potent inhibitor of leukocyte rolling and anti-inflammatory agent, against accelerated cerebral ischemic injury by LPS pretreatment using rats. We found that fucoidin treatment inhibited the expressions of some brain cytokine or chemokine mRNA such as IL-8, TNF-α and iNOS in the brain of the rats treated only with LPS. We also observed that fucoidin treatment dramatically decreased the infarct size in accelerated cerebral ischemic injury induced by LPS treatment at an early time after ischemic injury. In addition, the immunoreactivity of myleoperoxidase (MPO), a marker for quantifying neutrophil accumulation, was distinctively decreased in the ischemic brain of the fucoidin-treated rat. In brief, our results indicate that fucoidin showed a neuroprotective effect on LPS accelerated cerebral ischemic injury through inhibiting the expression of some cytokine/chemokine and neutrophil recruitments.
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Hu N, Westra J, Kallenberg CGM. Dysregulated neutrophil--endothelial interaction in antineutrophil cytoplasmic autoantibody (ANCA)-associated vasculitides: implications for pathogenesis and disease intervention. Autoimmun Rev 2011; 10:536-43. [PMID: 21513817 DOI: 10.1016/j.autrev.2011.04.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Accepted: 04/05/2011] [Indexed: 11/26/2022]
Abstract
The interplay between neutrophils and endothelial cells allows ANCA to become pathogenic and results in uncontrolled inflammation in the vessel wall. This review presents an overall view on neutrophil-endothelial interaction during inflammation with a focus on ANCA-associated vasculitis, and summarizes the effector mechanisms which cause vascular damage in AAV. In addition, potential elements for disease intervention based on this process are discussed.
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Affiliation(s)
- Nan Hu
- Department of Rheumatology and Clinical Immunology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Sachs D, Coelho FM, Costa VV, Lopes F, Pinho V, Amaral FA, Silva TA, Teixeira AL, Souza DG, Teixeira MM. Cooperative role of tumour necrosis factor-α, interleukin-1β and neutrophils in a novel behavioural model that concomitantly demonstrates articular inflammation and hypernociception in mice. Br J Pharmacol 2011; 162:72-83. [PMID: 20942867 DOI: 10.1111/j.1476-5381.2010.00895.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
UNLABELLED BACKGROUND AND PURPOSE; Chronic joint inflammation and pain are the hallmarks of disease in patients with inflammatory arthritis, notably rheumatoid arthritis. The aim of the present study was to investigate the relative contribution of tumour necrosis factor (TNF)-α, interleukin (IL)-1β and neutrophil influx for joint inflammation and nociception in a novel murine model of antigen-induced arthritis (AIA). EXPERIMENTAL APPROACH AIA was induced by administration of antigen into knee joint of previously immunized mice. Neutrophil accumulation was determined by counting neutrophils in the joints and assessing myeloperoxidase activity in tissues surrounding the joints. TNF-α, IL-1β and CXCL-1 were measured by elisa. Mechanical hypernociception was assessed in parallel, using an electronic pressure meter. KEY RESULTS Hypernociception was dependent on antigen dose and the time after its administration; it was prevented by treatment with morphine and associated with neutrophil infiltration and local production of TNF-α, IL-1β and CXCL-1. Administration of a chimeric monoclonal antibody to TNF-α (infliximab) or IL-1receptor antagonist prevented neutrophil influx and hypernociception, and this was comparable to the effects of dexamethasone. Treatment with fucoidin (a leucocyte adhesion inhibitor) greatly suppressed neutrophil influx and local production of TNF-α and IL-1β, and hypernociception. CONCLUSIONS AND IMPLICATIONS In conclusion, the present study describes a new model that allows for the concomitant evaluation of articular hypernociception and inflammation. Using this system, we demonstrated that a positive feedback loop involving neutrophil influx and the pro-inflammatory cytokines TNF-α and IL-1β is necessary for articular hypernociception after antigen challenge of immunized mice.
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Affiliation(s)
- Daniela Sachs
- Imunofarmacologia, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Fukuta K, Nakamura T. Induction of hepatocyte growth factor by fucoidan and fucoidan-derived oligosaccharides. J Pharm Pharmacol 2010; 60:499-503. [DOI: 10.1211/jpp.60.4.0013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Fucoidan, which is extracted from brown seaweed, is a complex sulphated polysaccharide that is mostly composed of l-fucose and sulphated ester groups. The structural and anionic characteristics of fucoidan are similar to those of heparin. Heparin stimulates production of hepatocyte growth factor (HGF), which has key roles in tissue regeneration. We have shown that fucoidan and fucoidan-derived oligosaccharides have similar ability to stimulate production of HGF as heparin and heparin-derived oligosaccharides. This induction of HGF by heparin or fucoidan and their oligosaccharide derivates occurs primarily at the level of translation, probably via the same mechanism. Fucoidan may thus be useful to protect tissues and organs from various injuries and diseases, via mechanisms involving HGF.
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Affiliation(s)
- Kazuhiro Fukuta
- Division of Molecular Regenerative Medicine, Department of Biochemistry and Molecular Biology, Osaka University Graduate School of Medicine, 2-2-B7 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Toshikazu Nakamura
- Division of Molecular Regenerative Medicine, Department of Biochemistry and Molecular Biology, Osaka University Graduate School of Medicine, 2-2-B7 Yamadaoka, Suita, Osaka 565-0871, Japan
- Kringle Pharma Joint Research Division for Regenerative Drug Discovery, Center for Advanced Science and Innovation, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Abstract
BACKGROUND It is hypothesized that psoriasis is an autoimmune disease. The most recent therapeutic approach that proved to be more effective than earlier methods of treatment is the use of mAb/fusion proteins. Efforts nowadays are focused on investigating the antipsoriatic affect of small molecules that can be administered orally, some of which are capable of entering cells, and being selective in targeting intracellular pathways. OBJECTIVE Preclinical patented small molecules that are recommended for the treatment of psoriasis are reviewed. Emphasis is placed on their mechanism of action. METHODS http://ep.espacenet.com/ , Pubmed, Scopus and Google websites were the main sources used for the patented small molecule search. A number of patents were poorly described and difficulties were faced in trying to figure out the patentee(s) explanation. Moreover, most patents were recommended for the treatment of a number of autoimmune diseases and cancer, and not only for psoriasis. RESULTS/CONCLUSIONS Small molecules that inhibit the activation of T lymphocytes, leukocyte trafficking, leukotriene activity/production and angiogenesis, and promote apoptosis have been patented. Small molecules that have been patented for the treatment of other autoimmune diseases and could be used for treating psoriasis are described. Moreover, other possible mechanistic approaches using small molecules are discussed.
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Affiliation(s)
- Alexander M Abdelnoor
- American University of Beirut, Department of Microbiology & Immunology, Riad el-Solh, Beirut 1107 2020, Lebanon.
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12
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Goor Y, Goor O, Wollman Y, Chernichovski T, Schwartz D, Cabili S, Iaina A. Fucoidin, an inhibitor of leukocyte adhesion, exacerbates acute ischemic renal failure and stimulates nitric oxide synthesis. ACTA ACUST UNITED AC 2009; 40:57-62. [PMID: 16452058 DOI: 10.1080/00365590500407597] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVES To lessen renal ischemic injury caused by fucoidin, a substance capable of reducing tissue infiltration by neutrophils, and to seek a possible interrelationship with the nitric oxide system which may also modulate leukocyte infiltration. MATERIAL AND METHODS Acute ischemic renal failure was induced in rats by uninephrectomy followed by 60 min of clamping of the renal artery. The rats were injected with fucoidin (25 mg/kg) or fucoidin+nitroprusside (2.5 mg/kg) before reperfusion, and urine was collected for 24 h afterwards. Serum and urine were examined for creatinine sodium and protein; creatinine clearance and fractional excretion of sodium (FENa) were calculated. The renal tissue of the sacrificed animals was examined histologically for tissue damage and histochemically for myeloperoxidase, a marker of neutrophil infiltration. The nitric oxide system was evaluated by measuring urinary nitrates and inducible nitric oxide synthase messenger RNA (iNOs mRNA). RESULTS Renal failure was more severe in the fucoidin group than the nitroprusside group (creatinine clearance 0.11+/-0.08 ml/min for ischemia+fucoidin versus 0.26+/-0.11 ml/min for ischemia only; p<0.002). Adding nitroprusside to fucoidin lessened the decline in creatinine clearance (0.13+/-0.13 ml/min; p=NS). Fucoidin was associated with greater tubular damage, as evidenced by increased FENa (7.2%+/-2.8% vs 1.51%+/-1.96% for ischemia only; p<0.001). Nitroprusside weakened this trend. Fucoidin caused an increase in the fractional excretion of nitrates, a response accompanied by increased iNOS mRNA. CONCLUSIONS Fucoidin failed to protect the kidney from ischemic damage and was even nephrotoxic. It also stimulated the formation of iNOS RNA.
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Affiliation(s)
- Yoav Goor
- Department of Internal Medicine 6, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
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Barreto ARF, Cavalcante IC, Castro MV, Junqueira AFTA, Vale MR, Ribeiro RA, Souza MHLP, Brito GAC. Fucoidin prevents Clostridium difficile toxin-A-induced ileal enteritis in mice. Dig Dis Sci 2008; 53:990-6. [PMID: 17805968 DOI: 10.1007/s10620-007-9957-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2007] [Accepted: 08/01/2007] [Indexed: 12/18/2022]
Abstract
Recent reports suggest increased incidence and severity of Clostridium difficile-associated diseases. These facts have raised the need for additional clarification of pathogenesis and for a search for new therapeutic strategies. This study evaluated the effects of the polysaccharide fucoidin, an L-selectin blocker, on toxin-A-induced mouse enteritis. Fucoidin (25 mg/kg) or saline (0.1 ml) were injected systemically (ocular plexus) 5 min prior to local challenge with toxin A (5 microg/ileal loop) or phosphate-buffered saline (PBS). Intestinal fluid volume/length and ileal loop weight/length ratios were calculated 3 h later. Ileal tissues were collected for histopathology and measurement of myeloperoxidase and adenosine deaminase activity. Fucoidin significantly (P < 0.05) prevented the toxin-A-induced increase in weight/length and volume/length ratios and reduced mucosal disruption, as shown in histopathology. Fucoidin also significantly (P < 0.05) reduced toxin-A-induced myeloperoxidase and adenosine deaminase activities. In conclusion, fucoidin reduces tissue injury and inflammation in toxin-A-induced mouse enteritis.
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Affiliation(s)
- A R F Barreto
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Rua Delmiro de Farias, sn, Fortaleza, CE CEP 60.416-030, Brazil
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Khatuntseva EA, Ustuzhanina NE, Zatonskii GV, Shashkov AS, Usov AI, Nifant'ev NE. Synthesis, NMR and Conformational Studies of Fucoidan Fragments 1:1Desulfated 2,3- and 3,4-Branched Trisaccharide Fragments and Constituting Disaccharides. J Carbohydr Chem 2008. [DOI: 10.1080/07328300008544140] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Elena A. Khatuntseva
- a N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- b N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- c N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- d N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- e N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
| | - Nadezhda E. Ustuzhanina
- a N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- b N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- c N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- d N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- e N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
| | - Georgij V. Zatonskii
- a N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- b N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- c N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- d N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- e N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
| | - Alexander S. Shashkov
- a N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- b N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- c N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- d N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- e N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
| | - Anatoly I. Usov
- a N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- b N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- c N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- d N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- e N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
| | - Nikolay E. Nifant'ev
- a N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- b N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- c N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- d N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
- e N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, 117913 Moscow B-334, Russia
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Ovechkin AV, Lominadze D, Sedoris KC, Robinson TW, Tyagi SC, Roberts AM. Lung ischemia-reperfusion injury: implications of oxidative stress and platelet-arteriolar wall interactions. Arch Physiol Biochem 2007; 113:1-12. [PMID: 17522980 PMCID: PMC3182489 DOI: 10.1080/13813450601118976] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Pulmonary ischemia-reperfusion (IR) injury may result from trauma, atherosclerosis, pulmonary embolism, pulmonary thrombosis and surgical procedures such as cardiopulmonary bypass and lung transplantation. IR injury induces oxidative stress characterized by formation of reactive oxygen (ROS) and reactive nitrogen species (RNS). Nitric oxide (NO) overproduction via inducible nitric oxide synthase (iNOS) is an important component in the pathogenesis of IR. Reaction of NO with ROS forms RNS as secondary reactive products, which cause platelet activation and upregulation of adhesion molecules. This mechanism of injury is particularly important during pulmonary IR with increased iNOS activity in the presence of oxidative stress. Platelet-endothelial interactions may play an important role in causing pulmonary arteriolar vasoconstriction and post-ischemic alveolar hypoperfusion. This review discusses the relationship between ROS, RNS, P-selectin, and platelet-arteriolar wall interactions and proposes a hypothesis for their role in microvascular responses during pulmonary IR.
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Affiliation(s)
- Alexander V Ovechkin
- Department of Physiology, School of Medicine University of Louisville, Louisville, Kentucky 40202, USA.
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Roman A, McGahren ED. L-NAME-induced neutrophil accumulation in rat lung is not entirely because of interactions with L- and P-selectins or CD18. J Pediatr Surg 2006; 41:1743-9. [PMID: 17011281 DOI: 10.1016/j.jpedsurg.2006.05.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND/PURPOSE Nitric oxide (NO) is a known selective dilator of the pulmonary vascular tree. There is evidence that it also plays a role in diminishing neutrophil adherence to vascular endothelial cells. Close examination of these effects of NO on the pulmonary microcirculation is essential to our understanding of its mechanisms of action as well as its potential as a therapeutic agent to reduce neutrophil sequestration, and its subsequent damage, in a variety of conditions that cause lung injury and inflammation. This study explores the mechanism by which endogenous NO influences neutrophil-endothelial cell interactions by examining the effects of the adhesion molecule blockers, fucoidin, and anti-CD18 antibody. METHODS Lung samples from 10 sets of rats (n = 4 for each study group) were studied. Each rat received an intravenous bolus of normal saline, fucoidin, or anti-CD18 antibody, followed by a 1-hour infusion of normal saline or N omega-nitro-L-arginine methyl ester (L-NAME) at 2 mg kg(-1) min(-1). The accumulation of neutrophils within the lungs was assessed quantitatively by myeloperoxidase assay. RESULTS Fucoidin application decreased some neutrophil activity, but this may have been independent of the effects on L-NAME activity. The anti-CD18 pretreatment did not have a significant effect on any of the groups in the presence or absence of L-NAME. CONCLUSIONS These data indicate that L-NAME does not conclusively produce its associated increase in neutrophil activity in the baseline state of the lungs via an interaction with L-selectin, P-selectin, or CD18. Rather, the inhibition of NO may lead to the expression of a different adhesion molecule or factor that is normally not expressed in the presence of NO. Endogenous NO may also possibly influence neutrophil-endothelial interaction by affecting hemodynamics rather than actions of adhesion molecules.
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Affiliation(s)
- Angela Roman
- Division of Pediatric Surgery, Department of Surgery, University of Virginia Health System, Box 800709, Charlottesville, VA 22908-0709, USA
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Roberts AM, Ovechkin AV, Mowbray JG, Robinson TW, Lominadze D. Effects of pulmonary ischemia-reperfusion on platelet adhesion in subpleural arterioles in rabbits. Microvasc Res 2004; 67:29-37. [PMID: 14709400 DOI: 10.1016/j.mvr.2003.09.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Reperfusion of the ischemic lung is associated with increased pulmonary vascular resistance and reduced alveolar perfusion in conjunction with an inflammatory response. To determine the contribution of platelet-endothelial interactions, we examined effects of pulmonary ischemia-reperfusion (IR) on platelet adhesion and diameter of arterioles and investigated the hypothesis that this process is P-selectin mediated. In anesthetized rabbits with open-chest and ventilated lungs, we examined subpleural arterioles by fluorescence microscopy. Ischemia was caused by reversibly occluding the right pulmonary artery for 2 h. Fluorescently labeled platelets were injected into the right atrium and the right lung was observed after 0.5, 1.0, and 2.0 h of reperfusion. Platelets rolling and adherence along arterioles occurred with a decrease in diameter that was significant during IR, but not after 3- to 5-min occlusion (control). Systemic pretreatment with Fucoidan (a ligand to P- and L-selectin) inhibited platelet rolling, adherence, and the decrease in diameter. Pretreatment of only exogenously labeled platelets with monoclonal antibody (MoAb) to P-selectin prevented platelet rolling and adherence, but not the decrease in diameter. These results indicate that in the intact lung, pulmonary IR causes platelet rolling and adhesion along arteriolar walls, and suggest that this process, which is mediated by P-selectin, contributes to vasoconstriction and hypoperfusion. Thus, it appears that platelet-endothelial interactions may contribute to the development of pulmonary IR injury.
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Affiliation(s)
- Andrew M Roberts
- Department of Physiology & Biophysics, School of Medicine, University of Louisville, Louisville, KY 40292, USA.
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19
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La M, Cao TV, Cerchiaro G, Chilton K, Hirabayashi J, Kasai KI, Oliani SM, Chernajovsky Y, Perretti M. A novel biological activity for galectin-1: inhibition of leukocyte-endothelial cell interactions in experimental inflammation. THE AMERICAN JOURNAL OF PATHOLOGY 2003; 163:1505-15. [PMID: 14507657 PMCID: PMC1868297 DOI: 10.1016/s0002-9440(10)63507-9] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Galectin-1 (Gal-1), the prototype of a family of beta-galactoside-binding proteins, has been shown to attenuate experimental acute and chronic inflammation. In view of the fact that endothelial cells (ECs), but not human polymorphonuclear leukocytes (PMNs), expressed Gal-1 we tested here the hypothesis that the protein could modulate leukocyte-EC interaction in inflammatory settings. In vitro, human recombinant (hr) Gal-1 inhibited PMN chemotaxis and trans-endothelial migration. These actions were specific as they were absent if Gal-1 was boiled or blocked by neutralizing antiserum. In vivo, hrGal-1 (optimum effect at 0.3 micro g equivalent to 20 pmol) inhibited interleukin-1beta-induced PMN recruitment into the mouse peritoneal cavity. Intravital microscopy analysis showed that leukocyte flux, but not their rolling velocity, was decreased by an anti-inflammatory dose of hrGal-1. Binding of biotinylated Gal-1 to resting and postadherent human PMNs occurred at concentrations inhibitory in the chemotaxis and transmigration assays. In addition, the pattern of Gal-1 binding was differentially modulated by PMN or EC activation. In conclusion, these data suggest the existence of a previously unrecognized function of Gal-1, that is inhibition of leukocyte rolling and extravasation in experimental inflammation. It is possible that endogenous Gal-1 may be part of a novel anti-inflammatory loop in which the endothelium is the source of the protein and the migrating PMNs the target for its anti-inflammatory action.
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Affiliation(s)
- Mylinh La
- Department of Biochemical Pharmacology and the Bone and Joint Research Unit, The William Harvey Research Institute, London, United Kingdom
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20
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Cetin C, Ozyilmaz M, Bayçu C, Köse AA, Karabağli Y. Effects of rolling inhibition on smoke inhalation injury. Burns 2003; 29:307-14. [PMID: 12781607 DOI: 10.1016/s0305-4179(03)00005-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Inhalation of chemical and particulate products of smoke is one of the principal determinant of mortality following burn injury. Inflammatory responses have been implicated in the pathogenesis of lung injury after smoke inhalation. In the current study, we tested the inhibitory effect of Fucoidin on the neutrophil rolling stage of inflammatory response and determined the degree of pulmonary injury. Fifteen rats were divided into three groups: sham group (N: 5) of rats inhaled room air; control group (N: 5) inhaled smoke, and experimental group inhaled smoke and received Fucoidin. All the rats were sacrificed 24h after smoke inhalation. The trachea and lungs were removed totally; samples for histopathological and biochemical (myeloperoxidase (MPO)) analysis were taken from each lung and trachea. Morphologic studies using light and electron microscopes showed a decrease in lung parenchymal and tracheoepithelial injury in the experiment group of rats. Also, biochemical analysis of tissue MPO was significantly lower in test group than in control group. These results suggest that the inhibition of neutrophil rolling leads to a reduction of neutrophil invasion to pulmonary parenchyma and trachea, which may be beneficial for attenuating neutrophil mediated inhalation injury.
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Affiliation(s)
- Cengiz Cetin
- Department of Plastic and Reconstructive Surgery, Medical School, Osmangazi University, 26480 Meşelik Eskişehir, Turkey
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21
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Yamashiro K, Kiryu J, Tsujikawa A, Nonaka A, Nishijima K, Kamizuru H, Miyamoto K, Honda Y, Jomori T, Ogura Y. Suppressive effects of selectin inhibitor SKK-60060 on the leucocyte infiltration during endotoxin induced uveitis. Br J Ophthalmol 2003; 87:476-80. [PMID: 12642314 PMCID: PMC1771581 DOI: 10.1136/bjo.87.4.476] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND It is well known that selectin is involved in the development of endotoxin induced uveitis (EIU), and has a major role in leucocyte infiltration. Recently, a novel selectin inhibitor (SKK-60060) that can block P and L selectins in vitro has been developed. This study was designed to investigate the anti-inflammatory effects of SKK-60060 on the inflammatory reaction during EIU in rats by studying leucocyte-endothelium interactions. METHODS EIU was induced in Lewis rats by footpad injection of lipopolysaccharide (LPS). SKK-60060 was administered 15 minutes before LPS injection, and its suppressive effects on inflammatory leucocyte behaviour were evaluated in vivo with acridine orange digital fluorography; the diameters of retinal arteries and veins were also measured. After these studies, aqueous humour was collected to evaluate leucocyte infiltration and protein leakage. RESULTS After LPS injection, rolling leucocytes were observed in major retinal veins, followed by leucocyte infiltration into the vitreous cavity. Following treatment with SKK-60060, leucocyte rolling was significantly inhibited in the retinal veins (p <0.01), and subsequent leucocyte infiltration into the vitreous cavity was also significantly suppressed (p <0.01). Retinal vasodilation was also substantially suppressed in SKK-60060 treated rats (p <0.01). Similarly, leucocyte infiltration and protein leakage into the aqueous humour were reduced significantly by SKK-60060 (p <0.01). CONCLUSIONS SKK-60060 treatment significantly inhibited the inflammatory reaction induced by LPS. Its inhibitory effects on P and L-selectin resulted in suppression of leucocyte infiltration and the subsequent inflammatory reaction caused by accumulated leucocytes. The current findings suggest that SKK-60060 may be useful in the management of uveitis.
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Affiliation(s)
- K Yamashiro
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan
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22
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Zen K, Liu Y, Cairo D, Parkos CA. CD11b/CD18-dependent interactions of neutrophils with intestinal epithelium are mediated by fucosylated proteoglycans. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2002; 169:5270-8. [PMID: 12391246 DOI: 10.4049/jimmunol.169.9.5270] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CD11b/CD18-mediated adhesive interactions play a key role in regulating polymorphonuclear leukocytes (PMN)) migration across intestinal epithelium. However, the identity of epithelial ligands for migrating PMN remains obscure. In this study we investigated the role of carbohydrates in mediating adhesive interactions between T84 intestinal epithelial cells and CD11b/CD18 purified from PMN. Fucoidin, heparin/heparin sulfate, N-acetyl-D-glucosamine, mannose-6-phosphate, and laminarin were found to inhibit adhesion of T84 cells to CD11b/CD18. The most potent inhibitory effects were observed with fucoidin (50% inhibition at 1-5 x 10(-8) M). Binding assays demonstrated that fucoidin directly bound to CD11b/CD18 in a divalent cation- and sulfation-dependent fashion that was blocked by anti-CD11b mAbs. Experiments employing CD11b/CD18 as a probe to blot T84 cell fucosylated proteins purified via fucose-specific lectin column revealed several candidate CD11b/CD18 binding proteins with molecular masses of 95, 50, 30, 25, and 20 kDa. Fucosidase treatment of T84 cells resulted in significantly reduced cell adhesion to CD11b/CD18, while no inhibition was observed after neuraminidase treatment. Finally, significant inhibition of T84 cell adhesion to CD11b/CD18 was observed after blocking cell proteoglycan synthesis with p-nitrophenyl-beta-D-xylopyranoside. These findings implicate epithelial cell surface proteoglycans decorated with sulfated fucose moieties as ligands for CD11b/CD18 during PMN migration across mucosal surfaces.
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Affiliation(s)
- Ke Zen
- Division of Gastrointestinal Pathology, Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA 30322, USA.
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23
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Deux JF, Meddahi-Pellé A, Le Blanche AF, Feldman LJ, Colliec-Jouault S, Brée F, Boudghène F, Michel JB, Letourneur D. Low molecular weight fucoidan prevents neointimal hyperplasia in rabbit iliac artery in-stent restenosis model. Arterioscler Thromb Vasc Biol 2002; 22:1604-9. [PMID: 12377737 DOI: 10.1161/01.atv.0000032034.91020.0a] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE Smooth muscle cell (SMC) proliferation within the intima is regulated by heparan sulfates. We studied a low molecular weight (LMW) fucoidan (sulfated polysaccharide from brown seaweed) on SMC proliferation in vitro and intimal hyperplasia in vivo. METHODS AND RESULTS In vitro study revealed that LMW fucoidan reduces rabbit SMC proliferation and is internalized in SMC perinuclear vesicles. On rabbit iliac arteries perfused in vivo with fluorolabeled LMW fucoidan after angioplasty, the labeling was mainly located on sites of injury. Pharmacokinetic studies showed that LMW fucoidan exhibited in rats an elimination half-life of 56+/-25 minutes (n=8) after intravenous administration and a constant plasma rate for > or =6 hours after intramuscular administration. After stent implantation in their iliac arteries, rabbits were also treated with LMW fucoidan (5 mg/kg IM twice a day). Histomorphometric analysis at day 14 indicated that LMW fucoidan reduced intimal hyperplasia by 59% (1.79+/-0.4 versus 0.73+/-0.2 mm2, P<0.0001) and luminal cross-sectional area narrowing by 58% (0.38+/-0.08 versus 0.16+/-0.04, P<0.0001). Blood samples showed no anticoagulant activity due to LMW fucoidan. CONCLUSIONS This natural polysaccharide with high affinity for SMCs and sustained plasma concentration markedly reduced intimal hyperplasia, suggesting its use for the prevention of human in-stent restenosis.
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MESH Headings
- Angioplasty, Balloon/adverse effects
- Animals
- Cell Division
- Cells, Cultured
- Constriction, Pathologic/complications
- Constriction, Pathologic/prevention & control
- Disease Models, Animal
- Fucose/pharmacokinetics
- Fucose/therapeutic use
- Hyperplasia/prevention & control
- Iliac Artery/injuries
- Iliac Artery/metabolism
- Iliac Artery/pathology
- Male
- Molecular Weight
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/growth & development
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/pathology
- Polysaccharides/pharmacokinetics
- Polysaccharides/therapeutic use
- Rabbits
- Recurrence
- Stents/adverse effects
- Tunica Intima/pathology
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Affiliation(s)
- Jean-François Deux
- ERIT-M 0204 INSERM, X. Bichat Hospital, University Paris VII, Paris, France
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24
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Dittrich S, Lippek F, Gratopp A, Grosse-Siestrup C, Lange PE, Bührer C. Intravascular granulocyte aggregates caused by the selectin-binding carbohydrate fucoidin in pig kidneys. Clin Exp Pharmacol Physiol 2002; 29:909-14. [PMID: 12207571 DOI: 10.1046/j.1440-1681.2002.03749.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
1. Renal postischaemic reperfusion injury constitutes a significant problem after kidney transplantation. The polysaccharide fucoidin improves postischaemic function in lamb hearts, presumably by blocking selectin-mediated leucocyte adhesion. 2. In the present study, eight pairs of ischaemic pig kidneys were reperfused in an ex vivo model with autologous blood with or without fucoidin (100 mg/L). 3. Fucoidin resulted in a significant decrease in renal blood flow (45 +/- 5 vs 178 +/- 22 mL/min per 100 g; P < 0.001) and increased vascular resistance (3.80 +/- 0.07 vs 0.60 +/- 0.12 mmHg/mL per min per 100 g; P < 0.001). 4. Histological examination revealed granulocyte emboli in afferent glomerular arteries in five of six fucoidin-treated kidneys and in one of six controls (Fisher's exact test; P < 0.001). 5. In vitro experiments with human granulocytes showed that large granulocyte aggregates were induced by fucoidin at concentrations similar to those used in reperfused kidneys, whereas slightly lower doses of fucoidin prevented l-selectin-dependent homotypic granulocyte adhesion. 6. The formation of embolizing granulocyte aggregates defines a narrow therapeutic range for fucoidin and calls into question its experimental use as an inhibitor of selectin-mediated leucocyte adhesion.
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Affiliation(s)
- Sven Dittrich
- Department of Congenital Heart Disease, German Heart Institute, Berlin, Germany.
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25
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Levine AJ, Parkes K, Rooney SJ, Bonser RS. The effect of adhesion molecule blockade on pulmonary reperfusion injury. Ann Thorac Surg 2002; 73:1101-6. [PMID: 11996249 DOI: 10.1016/s0003-4975(01)03380-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND Selectins are the molecules involved in the initial adhesion of the activated neutrophil on pulmonary endothelium. We investigated the efficacy of selectin blockade in a selective (monoclonal antibody RMP-1) and nonselective (Fucoidin) manner in pulmonary reperfusion injury. METHODS Groups of six rat lungs were flushed with University of Wisconsin solution then stored at 4 degrees C for 4 hours. They then underwent sanguinous reperfusion for 30 minutes during which functional measures (gas exchange, pulmonary artery pressure, and airway pressure) of lung performance were made. After reperfusion we estimated their capillary filtration coefficient (Kfc units g/cm water/minute/g wet lung tissue) using a gravimetric technique. Four groups were studied: group I had no reperfusion, group II had 30 minutes of reperfusion, group III had infusion of 20 mg/kg Fucoidin before reperfusion, and group IV had infusion of 20 microg/mL RMP-1 before reperfusion. RESULTS Reperfusion injury was found between groups I and II by an increase in capillary filtration coefficient (1.048 +/- 0.316 to 3.063 +/- 0.466, p < 0.01). Groups III and IV had a significantly lower Kfc than group II (0.967 +/- 0.134 and 1.205 +/- 0.164, respectively, p < 0.01). There was no significant functional difference between groups II, III, and IV. CONCLUSIONS Reperfusion-induced hyperpermeability was ameliorated by selective (RMP-1) and nonselective (Fucoidin) selectin blockade.
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Affiliation(s)
- Adrian J Levine
- Cardiothoracic Surgical Unit, Queen Elizabeth Hospital, Edgbaston, Birmingham, United Kingdom
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26
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Abstract
This article reviews recent advances in the knowledge of the role of L-selectin, an adhesion molecule that is expressed on the surface of circulating leucocytes, in animal and human physiology and pathophysiology. After a brief discussion on nomenclature and structure, it progresses through the evidence for expression and regulation of L-selectin, cell collection and purification, physiological function and roles. The special role of knock out mice and monoclonal antibodies in determining a role for L-selectin in inflammatory states is described before proceeding to discuss the importance of L-selectin ligands and shed L-selectin. A second section describes a role for L-selectin in pathophysiological states in animals and man, with special reference to trauma, systemic inflammatory syndromes and sepsis. The review concludes with a summary of the potential role of anti-inflammatory medication and L-selectin blockers in the management of inflammation.
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Affiliation(s)
- Timothy H Rainer
- Accident and Emergency Medicine Academic Unit, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, Shatin, People's Republic of China.
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27
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Ikegami-Kuzuhara A, Yoshinaka T, Ohmoto H, Inoue Y, Saito T. Therapeutic potential of a novel synthetic selectin blocker, OJ-R9188, in allergic dermatitis. Br J Pharmacol 2001; 134:1498-504. [PMID: 11724756 PMCID: PMC1573086 DOI: 10.1038/sj.bjp.0704397] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
1. We investigated the ability of a newly synthesized sugar derivative, OJ-R9188, [N-(2-tetradecylhexadecanoyl)-O-(L-alpha-fucofuranosyl)-D-seryl]-L-glutamic acid 1-methylamide 5-L-arginine salt, to block binding of selectins to their ligands in vitro and inhibit the infiltration of leukocytes in vivo. 2. OJ-R9188 prevented the binding of human E-, P- and L-selectin-IgG fusion proteins to immobilized sialyl Lewis(x) (sLe(x))-pentasaccharide glycolipid, with IC(50) values of 4.3, 1.3, and 1.2 microM, respectively. 3. In a mouse model of thioglycollate-induced peritonitis, OJ-R9188 at 10 mg kg(-1), i.v. inhibited neutrophil accumulation in the peritoneal cavity. In the IgE-mediated skin reaction, OJ-R9188 at 3 and 10 mg kg(-1), i.v. significantly inhibited extravasation of neutrophils and eosinophils into the inflammatory sites and at 10 mg kg(-1), i.v. also inhibited infiltration caused by picryl chloride-induced delayed-type hypersensitivity in mice. These results suggest that OJ-R9188 may be a useful selectin blocker, with activity against human and mouse E-, P- and L-selectins in vitro and in vivo, and that blocking selectin-sLe(x) binding is a promising strategy for the treatment of allergic skin diseases.
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Affiliation(s)
- A Ikegami-Kuzuhara
- R&D Laboratories, Nippon Organon K.K., 5-90. Tomobuchi-cho 1-chome Miyakojima-ku, Osaka 534-0016, Japan.
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28
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Rainer TH, Ng MH, Lam NY, Chan TY, Cocks RA. Role of monocyte L-selectin in the development of post-traumatic organ failure. Resuscitation 2001; 51:139-49. [PMID: 11718969 DOI: 10.1016/s0300-9572(01)00409-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The vascular leucocyte adhesion molecule, L-selectin, plays an important early role in monocyte trafficking at sites of inflammation, a process which leads to the development of inflammatory organ failure. In this prospective observational study, we investigate whether early numerical and functional changes in circulating monocytes, expression of monocyte L-selectin (CD62L) and monocyte:neutrophil L-selectin ratios are related to the subsequent development of post-traumatic organ failure (OF) and multiple organ dysfunction syndrome (MODS). Monocyte counts and cell surface L-selectin were measured by an automated cell counter and flow cytometry, respectively. Of 164 trauma patients admitted to a university emergency department resuscitation room, 64 had multiple injuries, 51 developed OF, 20 developed MODS and 21 died. Early monocyte counts in patients with multiple injuries were lower in those who developed MODS (0.44 x 10(9)/l) compared with those who did not (0.60 x 10(9)/l; P=0.024). Monocyte L-selectin mean channel fluorescence increased with injury severity and was highest in those who developed MODS (P=0.033). In the sub-group of patients with multiple injuries, L-selectin mean channel fluorescence was also greater in those patients who developed MODS compared with patients who did not develop MODS (P=0.042). The monocyte to neutrophil count ratio also decreased with injury severity (P=0.006). Using optimal cut off values for L-selectin mean channel, fluorescence, the positive and negative predictive values for OF was 43.5 and 91.4%, respectively and for MODS it was 25.4 and 92.9%, respectively. Alterations in early circulating monocyte counts and L-selectin expression after injury are related to the development of post-traumatic organ failure and suggest an area in the inflammatory pathway that may be influenced by L-selectin blockade.
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Affiliation(s)
- T H Rainer
- Accident and Emergency Medicine Academic Unit, The Chinese University of Hong Kong, Rooms G05/06, Cancer Centre, Prince of Wales Hospital, Shatin, NT, Hong Kong, People's Republic of China.
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29
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Abstract
The cell adhesion receptors that participate in the extravasation and migration of leucocytes towards inflammatory foci mainly include the selectins and different members of the integrin and immunoglobulin superfamilies. These adhesion receptors mediate the sequential steps of leucocyte-endothelial cell interaction and, together with chemoattractant molecules (e.g., chemokines), direct the influx of inflammatory cells and define the characteristics of the cell infiltrate. Many different drugs, including non-steroidal anti-inflammatory drugs (NSAIDs), glucocorticoids, rheumatoid arthritis disease-modifying agents and phosphodiesterase inhibitors, interfere with the expression and/or function of cell adhesion receptors and this effect accounts for, at least in part, their anti-inflammatory activity. In recent years, novel approaches for the modulation of the cell membrane receptors involved in inflammation have been active areas in pharmaceutical research. Upgraded synthetic blocking compounds, chimeric monoclonal antibodies or improved antisense oligonucleotides represent important advances in this field. The proper development of these novel approaches, as well as other alternative strategies, will allow a better and more specific pharmacological modulation of the inflammatory phenomenon.
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Affiliation(s)
- F Sánchez-Madrid
- Sección de Inmunología, Hospital de la Princesa, Diego de León 62, 28006 Madrid, Spain.
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30
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Ballinger A, Smith G. COX-2 inhibitors vs. NSAIDs in gastrointestinal damage and prevention. Expert Opin Pharmacother 2001; 2:31-40. [PMID: 11336566 DOI: 10.1517/14656566.2.1.31] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Non-steroidal anti-inflammatory drugs (NSAIDs) inhibit production of protective gastric mucosal prostaglandins and also have a direct topical irritant effect. In some patients this results in dyspepsia and development of gastroduodenal erosions and ulceration. The risk of ulcer complications, such as bleeding, perforation and death is increased approximately 4-fold in NSAID users. Patients at high risk of ulcer complications include the elderly, those taking anticoagulants, steroids and aspirin, those with a previous history of peptic ulceration and patients with concomitant serious medical problems. The interaction of NSAIDs with Helicobacter pylori (the major cause of peptic ulceration in non-NSAID users) is controversial and some studies suggest that H. pylori infection may even protect against NSAID-induced ulceration. Selective inhibitors of the inducible cyclooxygenase-2 (COX-2) enzyme spare COX-1 in the gastric mucosa and, hence, do not inhibit production of mucosal prostaglandins. COX-2-selective inhibitors are associated with a significant reduction in gastroduodenal damage compared with traditional NSAIDs. Proton pump inhibitors (PPI) are probably the best agents for healing and prevention of NSAID-induced ulcers. Preliminary studies suggest that COX-2 selective inhibitors, like traditional NSAIDs, may prevent lower gastrointestinal cancer. Further studies are needed but they may be useful in individuals at high risk of certain types of lower gastrointestinal malignancy with increased gastrointestinal tolerability and safety.
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Affiliation(s)
- A Ballinger
- Digestive Diseases Research Centre, Department of Adult and Paediatric Gastroenterology, St Bartholomew's and The Royal London School of Medicine and Dentistry, 2 Newark Street, London E1 2AT, UK.
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31
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Rainer TH, Lam NY, Chan TY, Cocks RA. Early role of neutrophil L-selectin in posttraumatic acute lung injury. Crit Care Med 2000; 28:2766-72. [PMID: 10966248 DOI: 10.1097/00003246-200008000-00014] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE To investigate whether early numerical and functional changes in circulating neutrophils and expression of neutrophil L-selectin and soluble L-selectin are related to the subsequent development of posttraumatic acute lung injury (ALI), the systemic inflammatory response syndrome, sepsis, and organ failure. DESIGN Prospective study of whole blood and plasma samples to assess numerical and functional changes in circulating neutrophils and in soluble L-selectin. SETTING The emergency department of a university hospital. PATIENTS A total of 147 patients admitted to the resuscitation room after trauma were compared with 69 control subjects. Ten patients developed ALI. LABORATORY ANALYSIS Flow cytometry of whole blood and ELISA of plasma. RESULTS Total leukocyte and neutrophil counts, expression of L-selectin, and the ratio of neutrophil to plasma L-selectin increased with injury and were highest in those who developed ALI. Soluble L-selectin decreased with injury severity and was lowest in those who developed ALI. CONCLUSIONS Early changes in the average expression of L-selectin per cell do not correlate with the development of subsequent posttraumatic ALI. However, the development of ALI is related to the total expression of L-selectin in the neutrophil mass, and the most striking association is in those with lower concentrations of plasma L-selectin.
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Affiliation(s)
- T H Rainer
- Accident and Emergency Medicine Academic Unit, Prince of Wales Hospital, Shatin, Hong Kong, China
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32
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Sweeney EA, Priestley GV, Nakamoto B, Collins RG, Beaudet AL, Papayannopoulou T. Mobilization of stem/progenitor cells by sulfated polysaccharides does not require selectin presence. Proc Natl Acad Sci U S A 2000; 97:6544-9. [PMID: 10841555 PMCID: PMC18653 DOI: 10.1073/pnas.97.12.6544] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Employing carbohydrate ligands, which have been extensively used to block selectin function in vitro and in vivo, we have examined the involvement of such ligands in stem/progenitor cell mobilization in mice and monkeys. We found that sulfated fucans, branched and linear, are capable of increasing mature white cells in the periphery and mobilizing stem/progenitor cells of all classes (up to 32-fold) within a few hours posttreatment in a dose-dependent manner. To elicit the effect, the presence of sulfate groups was necessary, yet not sufficient, as certain sulfated hexosamines tested (chondroitin sulfates A or B) were ineffective. Significant mobilization of stem/progenitor cells and leukocytosis was elicited in selectin-deficient mice (L(-/-), PE(-/-), or LPE(-/-)) similar to that of wild-type controls, suggesting that the mode of action of sulfated fucans is not through blockade of known selectins. Other mechanisms have been entertained, in particular, the release of chemokines/cytokines, including some previously implicated in mobilization. Significant increases were documented in the levels of seven circulating chemokines/cytokines within a few hours after fucan sulfate treatment and support such a proposition. Additionally, an increase was noted in plasma metalloproteinase (MMP) 9, which might independently contribute to the mobilization process by enzymatically facilitating chemokine/cytokine release. Mobilization by sulfated polysaccharides provides a distinct paradigm in the mobilization process and uncovers an additional novel in vivo biological role for sulfated glycans. As similarly sulfated compounds were ineffective in vivo, the data also underscore the fact that polysaccharides with similar structures may elicit diverse in vivo effects.
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Affiliation(s)
- E A Sweeney
- Department of Medicine, Division of Hematology, University of Washington, Seattle, WA 98195-7710, USA
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Fitzpatrick SL, Kassam G, Manro A, Braat CE, Louie P, Waisman DM. Fucoidan-dependent conformational changes in annexin II tetramer. Biochemistry 2000; 39:2140-8. [PMID: 10694379 DOI: 10.1021/bi992180z] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fucoidan, a sulfated fucopolysaccharide, mimics the fucosylated glycans of glycoproteins and has therefore been used as a probe for investigating the role of membrane polysaccharides in cell-cell adhesion. In the present report we have characterized the interaction of fucoidan with the Ca(2+)- and phospholipid-binding protein annexin II tetramer (AIIt). AIIt bound to fucoidan with an apparent K(d) of 1.24 +/- 0.69 nM (mean +/- SD, n = 3) with a stoichiometry of 0.010 +/- 0.001 mol of fucoidan/mol of AIIt (mean +/- SD, n = 3). The binding of fucoidan to AIIt was Ca(2+)-independent. Furthermore, in the presence but not the absence of Ca(2+), the binding of fucoidan to AIIt caused a decrease in the alpha-helical content from 32% to 7%. A peptide corresponding to a region of the p36 subunit of AIIt, F(306)-S(313), which contains a Cardin-Weintraub consensus sequence for heparin binding, was shown to undergo a conformational change upon fucoidan binding. This suggests that heparin and fucoidan bound to this region of AIIt. The binding of fucoidan but not heparin by AIIt also inhibited the ability of AIIt to bind to and aggregate phospholipid liposomes. These results suggest that the binding of AIIt to the carbohydrate conjugates of certain membrane glycoproteins may have profound effects on the structure and biological activity of AIIt.
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Affiliation(s)
- S L Fitzpatrick
- Cancer Biology Research Group, Department of Medical Biochemistry, University of Calgary, Calgary, Alberta, Canada T2N 4N1
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Abstract
OBJECTIVE Although surface adhesion molecules mediate leucocyte-endothelial interactions at sites of inflammation, relatively little is known of the factors which increase the expression of L-selectin in circulating leucocytes. The expression of leucocyte L-selectin increases during acute stress events such as injury and is temporally related to an early neuroendocrine response. This study investigates whether adrenaline increases the expression of L-selectin on monocytes, neutrophils and lymphocytes in vitro and whether these effects are mediated via beta-adrenoceptors. METHODS A total of 20 ml of blood was withdrawn from 28 healthy volunteers (21 males) with a mean age of 29 years (range 23-67 years). Adrenaline at physiological doses mimicking trauma (0-200 nmol/l) was added to whole blood prior to immunofluorescent staining and analysis by flow cytometry. Propranolol (50 microl of 2 x 10(-5) M) was also added to separate tubes prior to incubation with adrenaline. Saline (40 microl 0.9% solution) was used as a control. Expression is described firstly as percentage of cells expressing L-selectin and secondly as average intensity (mean channel fluorescence, mcf) per cell expressing CD62L. Summary measures were used to analyse the data. RESULTS A significant increase in both the percentage of monocytes expressing L-selectin and mean channel fluorescence of L-selectin was evident with adrenaline in vitro (P < 0.0001). Maximal increases occurred at 100 nmol/l adrenaline when a 9% increase in the percentage of monocytes expressing L-selectin and a 23% increase in mean channel fluorescence were observed. These effects were both blocked by propranolol (P < 0.0001). No significant differences were observed for neutrophils or lymphocytes except for a slight increase in the percent neutrophils expressing L-selectin, and a small decreasing trend in percent lymphocytes expressing L-selectin. CONCLUSIONS Adrenaline upregulates the surface expression of L-selectin on monocytes in vitro, an effect which is partially mediated by beta-adrenoceptors. As monocytes initiate early aspects of the inflammatory response, these findings suggest that beta-blockade may have an inhibitory role for certain aspects of leucocyte trafficking.
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Affiliation(s)
- T H Rainer
- Accident and Emergency Medicine Academic Unit, The Chinese University of Hong Kong, Cancer Centre, Prince of Wales Hospital, Shatin, NT.
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35
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Chauvet P, Bienvenu JG, Théorêt JF, Latour JG, Merhi Y. Inhibition of platelet-neutrophil interactions by Fucoidan reduces adhesion and vasoconstriction after acute arterial injury by angioplasty in pigs. J Cardiovasc Pharmacol 1999; 34:597-603. [PMID: 10511137 DOI: 10.1097/00005344-199910000-00018] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The selectin family of cell-adhesion molecules contributes to the interactions of leukocytes and platelets at the site of vascular injury. Such interactions enhance inflammatory reactions and thrombus formation during the arterial response to injury. In this study, we investigated the effects of a selectin inhibitor (Fucoidan) on platelet and neutrophil interactions after arterial injury produced by angioplasty in pigs. [51Cr]-platelet deposition and [111In]-neutrophil adhesion were quantified on intact, mildly, and deeply injured carotid arterial segments, produced by balloon dilation in control (saline, n = 7) and Fucoidan-treated (i.v.; 1 mg/kg, n = 6; 5 mg/kg, n = 5) pigs. In the control group, platelet deposition (x10(6)/cm2) was influenced by the severity of injury and increased significantly (p < 0.05) from 0.06+/-0.06 on intact endothelium to 3.8+/-0.6 and 33.6+/-4.9 on mildly and deeply injured segments, respectively. Fucoidan, 1 mg/kg, had no significant effect, although doses of 5 mg/kg reduced platelet deposition by 73% on deeply injured segments. The level of neutrophil adhesion (x10(3)/cm2) was also influenced by the severity of injury: it increased in the control group from 8.8+/-2.5 on intact endothelium to 226.6+/-45.5 and 397.4+/-61.3 on mildly and deeply injured arterial segments, respectively (p < 0.05). Again, 1 mg/kg Fucoidan had no effect, although doses of 5 mg/kg reduced neutrophil adhesion by 92% and by 84% on mildly and deeply injured segments, respectively. The effects of Fucoidan were associated with a 51% decrease in the vasoconstrictive response at the site of arterial injury. However, Fucoidan had no significant effect on either platelet aggregation or activated clotting time (ACT). In the in vitro perfusion experiments, Fucoidan inhibited both isolated platelet, and neutrophil, adhesion to damaged arterial surfaces. This inhibition was more pronounced in experiments using mixed cell preparations, indicating that Fucoidan interferes with platelet and neutrophil interactions. These results highlight the importance of selectins in the acute physiopathologic reactions related to platelet-neutrophil interactions after arterial injury.
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Affiliation(s)
- P Chauvet
- Laboratory of Experimental Pathology, Montreal Heart Institute and the University of Montreal, Quebec, Canada
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36
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Heinzelmann M, Polk HC, Miller FN. Modulation of lipopolysaccharide-induced monocyte activation by heparin-binding protein and fucoidan. Infect Immun 1998; 66:5842-7. [PMID: 9826363 PMCID: PMC108739 DOI: 10.1128/iai.66.12.5842-5847.1998] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Activated polymorphonuclear leukocytes release heparin-binding protein (HBP; also known as CAP37 or azurocidin) from azurophilic granules. HBP is a strong chemoattractant for monocytes that also prolongs monocyte survival and potentiates endotoxin (lipopolysaccharide [LPS])-induced production of tumor necrosis factor alpha (TNF-alpha). We investigated the binding of fluorescein isothiocyanate-conjugated HBP to human monocytes in the presence of EDTA and the polysaccharide fucoidan. EDTA, which chelates divalent cations, has been widely used to study the role of divalent cations in receptor-ligand interactions or enzyme activity. Fucoidan has been used to inhibit the binding of various ligands to scavenger receptors or selectins. Scavenger receptors are multiligand receptors that mediate endocytosis of proteases, protease-inhibitor complexes, lipoproteins, and LPS-lipid A. Fucoidan also interferes with leukocyte rolling by binding to L-selectins (expressed on leukocytes) and P-selectins (expressed on platelets and endothelium). We demonstrate that the binding of the neutrophil-derived protein HBP to monocytes is inhibited in the presence of EDTA and fucoidan. In addition, fucoidan and EDTA abrogate the enhancing effect of HBP on LPS-induced TNF-alpha production. These data provide supporting evidence that HBP binds to a receptor expressed on monocytes. This receptor is dependent on divalent cations and is possibly related to the scavenger receptor. Furthermore, we demonstrate that fucoidan, by itself, stimulates TNF-alpha release from isolated monocytes in a CD14-independent fashion. This is an important finding for the interpretation of results from studies that use fucoidan to "block" either scavenger receptors or L- or P-selectins.
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Affiliation(s)
- M Heinzelmann
- Department of Physiology and Biophysics, Department of Surgery, University of Louisville, School of Medicine, Louisville, Kentucky, USA.
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37
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Abstract
Cell adhesion molecules (CAM) have a key role in the inflammatory response. Selectins, integrins and immunoglobulin (Ig) gene superfamily adhesion receptors mediate the different steps of the migration of leucocytes from the blood-stream towards inflammatory foci. The activation of endothelial cells (EC) upregulates the expression of several CAM and triggers the interaction of these cells with leucocytes. Selectins are involved in the initial interactions (tethering/rolling) of leucocytes with activated endothelium, whereas integrins and Ig superfamily CAM mediate the firm adhesion of these cells and their subsequent extravasation. During rolling, leucocytes are activated through the intracellular signals generated by CAM and chemokine receptors. Blockade of the function or expression of CAM has emerged as a new therapeutic target in inflammatory diseases. Different drugs are able to interfere with cell adhesion phenomena. In addition, new antiadhesion therapeutic approaches (blocking monoclonal antibodies, soluble receptors, synthetic peptides, peptidomimetics, etc.) are currently in development.
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Affiliation(s)
- R González-Amaro
- Hospital Universitario de la Princesa, Universidad Autónoma de Madrid, Spain
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DeLisser HM, Albelda SM. The function of cell adhesion molecules in lung inflammation: more questions than answers. Am J Respir Cell Mol Biol 1998; 19:533-6. [PMID: 9761748 DOI: 10.1165/ajrcmb.19.4.f145] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- H M DeLisser
- Pulmonary and Critical Care Division, Department of Medicine, University of Pennsylvania Medical Center, Philadelphia, Pennsylvania, USA
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Linke R, Wagner F, Hammer C. Analysis of the microcirculation during xenogeneic liver perfusion in the guinea pig - rat model. The contribution of leukocytes to the rejection process. Transpl Int 1998. [DOI: 10.1111/j.1432-2277.1998.tb01180.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
Mucins are widely distributed in mucous secretion fluids or are associated with plasma membranes. Up to now 9 genes of epithelial mucins have been identified, distributed over five chromosomes. Superposed on the genetic diversity, each type of mucin displays heterogeneity in oligosaccharide composition, including the terminal sugar residues. On top of that there is variation between individuals brought about by blood group antigens. Heterogeneity is further incited by the degree of sulfation. This tremendous structural heterogeneity endows mucin molecules with properties suggestive for a multifunctional role. The major biological function assigned to mucins is still the protection of tissues covered by the mucous gel. Current knowledge on the specific biological functions of the sulfate residues is fragmentary and periphrastic. Glycosylation including sulfation appears to be subject to modification under pathological conditions. There is evidence that sulfation rate-limits bacterial degradation of mucins. Moreover, accumulating data focus towards their involvement in recognition phenomena. Sulfate residues on blood group related structures provoke specific epitopes for selective interaction with microorganisms e.g. Helicobacter pylori. A distinct class of mucins acts as ligands for selectins, crucial in cellular recognition processes like cellular homing of lymphocytes. Whereas in earlier days mucins were only seen as water-binding molecules, protecting the underlying mucosa against harmful agents, the current picture of these molecules is characterized by the selective interaction with their environment, including epithelial-, and endothelial cells and microorganisms, thereby regulating a great number of biological processes. However, the specific role of sulfate remains to be further elucidated.
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Affiliation(s)
- A V Nieuw Amerongen
- Dept. of Oral Biochemistry, Academic Centre for Dentistry Amsterdam (ACTA), The Netherlands
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Waisman D, Van Eeden SF, Hogg JC, Solimano A, Massing B, Bondy GP. L-selectin expression on polymorphonuclear leukocytes and monocytes in premature infants: reduced expression after dexamethasone treatment for bronchopulmonary dysplasia. J Pediatr 1998; 132:53-6. [PMID: 9470000 DOI: 10.1016/s0022-3476(98)70484-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We examined the effect of dexamethasone on the expression of the adhesion molecule L-selectin on circulating polymorphonuclear leukocytes (PMLs) and monocytes from premature infants with bronchopulmonary dysplasia (BPD). Nineteen infants who received dexamethasone (Dex group) and 28 who did not receive dexamethasone (no Dex group) were studied. L-selectin expression, measured as mean fluorescence intensity, was lower on circulating PMLs (5.7 +/- 0.6 vs 10.6 +/- 0.7, p < 0.001) and monocytes (7.9 +/- 0.9 vs 12.5 +/- 0.9, p < 0.02) isolated from those who had received dexamethasone. Because L-selectin is important for the recruitment of PMLs to inflammatory foci in the lungs, we speculate that one of the mechanisms by which dexamethasone reduces inflammation in BPD is by impairing the ability of leukocytes to migrate into the BPD lesions.
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Affiliation(s)
- D Waisman
- Department of Pediatrics, BC Children's Hospital, Vancouver, Canada
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42
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Abstract
There are several biological events that are known to involve certain sulfated saccharides. In many such cases, however, clustered ligands have been shown to be more effective than monovalent saccharides. A set of 6-aminohexyl glycosides of 2,3,4 or 6-monosulfated galactose have been synthesized and linked to polyglutamic acid. Because of the bulky aglycon employed, the 2-OH group of the key compound, 6-benzyloxycarbonylaminohexyl 4,6-O-benzylidene-beta-D-galactopyranoside was markedly less reactive than 3-OH. Thus, site-specific acetylation of 3-OH was readily carried out to obtain 2-O-sulfated galactosides, and even the direct sulfation of 3-OH afforded the 3-sulfate in a reasonable yield. On the other hand, the key compound was unexpectedly resistant to 2,3-O-dibenzylation or 2,3-O-dibenzoylation, both of which were meant for regioselective cleavage of 4,6-benzylidene to obtain the 4-sulfate.
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Affiliation(s)
- T Yoshida
- Department of Biology, Johns Hopkins University, Baltimore, MD 21218, USA.
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Nasu T, Fukuda Y, Nagahira K, Kawashima H, Noguchi C, Nakanishi T. Fucoidin, a potent inhibitor of L-selectin function, reduces contact hypersensitivity reaction in mice. Immunol Lett 1997; 59:47-51. [PMID: 9334857 DOI: 10.1016/s0165-2478(97)00100-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In order to investigate the role of L-selectin (CD62L) in delayed-type hypersensitivity (DTH) reaction, effect of fucoidin, a potent inhibitor of CD62L function, was examined in a model of mouse contact hypersensitivity reaction. Intravenous injection of fucoidin to sensitized mice just before hapten challenge resulted in a significant and dose-dependent reduction of the ear swelling in contact hypersensitivity. The ear swelling caused by the hapten challenge was also inhibited when fucoidin was administered at the sensitization phase. Histological analyses of the ear sections revealed that the fucoidin-induced suppression of contact hypersensitivity reflected a marked inhibition of the ear edema and the leukocyte infiltration. The activity of fucoidin was specific in that its related saccharides exerted little effect on the reaction. These results suggest that CD62L may play an important role in both afferent and efferent phases of cutaneous DTH reaction. Since DTH response is one of the most significant features of several chronic inflammatory diseases, our data also show that blocking of CD62L function may be beneficial for the treatment of these diseases in humans.
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Affiliation(s)
- T Nasu
- Suntory Institute for Biomedical Research, Osaka, Japan
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44
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Kuebler WM, Kuhnle GE, Groh J, Goetz AE. Contribution of selectins to leucocyte sequestration in pulmonary microvessels by intravital microscopy in rabbits. J Physiol 1997; 501 ( Pt 2):375-86. [PMID: 9192309 PMCID: PMC1159485 DOI: 10.1111/j.1469-7793.1997.375bn.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
1. Sequestration of leucocytes in the lung is the net result of leucocyte rolling and sticking in pulmonary arterioles and venules and their retention in alveolar capillaries. 2. In order to investigate whether adhesion molecules of the selectin family contribute to these phenomena the effects of fucoidin (an inhibitor of L- and P-selectin) on microhaemodynamics and leucocyte kinetic were studied in pulmonary arterioles, capillaries and venules by means of intravital fluorescence microscopy in a rabbit model. 3. Fucoidin reduced leucocyte rolling in pulmonary arterioles and venules by 75 and 83%, respectively, without affecting leucocyte sticking. In alveolar capillaries, fucoidin reduced leucocyte retention and accelerated leucocyte passage, thus reducing the alveolar transit time of leucocytes by 62%. 4. It is concluded that rolling of leucocytes in pulmonary microvessels is mediated by selectins, whereas sticking relies on selectin-independent mechanisms. 5. Leucocyte retention in alveolar capillaries is not due solely to mechanical hindrance of leucocyte passage through narrow vessel segments, as previously hypothesized, but also depends on interaction of leucocytes with the capillary endothelium.
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Affiliation(s)
- W M Kuebler
- Institute for Surgical Research, Klinikum Grosshadern, University of Munich, Germany
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Mojcik CF, Shevach EM. Adhesion molecules: a rheumatologic perspective. ARTHRITIS AND RHEUMATISM 1997; 40:991-1004. [PMID: 9182908 DOI: 10.1002/art.1780400602] [Citation(s) in RCA: 115] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- C F Mojcik
- Bayer Pharmaceutical, West Haven, Connecticut 06516, USA
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Mizgerd JP, Meek BB, Kutkoski GJ, Bullard DC, Beaudet AL, Doerschuk CM. Selectins and neutrophil traffic: margination and Streptococcus pneumoniae-induced emigration in murine lungs. J Exp Med 1996; 184:639-45. [PMID: 8760817 PMCID: PMC2192708 DOI: 10.1084/jem.184.2.639] [Citation(s) in RCA: 133] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The roles of selectins in the pulmonary margination and emigration of neutrophils were investigated by using mice genetically deficient in both E- and P-selectins (E/P mutants) and/or by intravenous injections of fucoidin (inhibiting both L- and P-selectins). E/P mutants were neutrophilic (14.7 +/- 4.9 x 10(6) vs. 0.8 +/- 0.1 x 10(6) neutrophils/ml). This neutrophilia was associated with increased margination of neutrophils within pulmonary capillaries (39.7 +/- 9.4 vs. 4.6 +/- 1.1 neutrophil profiles per 100 red blood cell profiles) but no change in margination within noncapillary pulmonary microvessels. After intratracheal instillation of Streptococcus pneumoniae, lungs of E/P mutants displayed increased neutrophil emigration (564 +/- 92 vs. 116 +/- 19 neutrophils per 100 alveolar profiles), edema (5.3 +/- 1.5 vs. 1.5 +/- 0.4 microliter/g body weight), and histologic evidence of lung injury compared with those in wild-type (WT). Fucoidin treatment did not affect neutrophil emigration during streptococcal pneumonia in WT or E/P mice. During pneumonia, the number of white blood cells (WBC) tethered to or spread upon the noncapillary vessel endothelium increased in both WT and E/P lungs. These are the first data demonstrating that neutrophil margination in uninfected pulmonary capillaries does not require E- and P-selectins; that streptococcal pneumonia induces an E- and P-selectin-independent increase in WBC interactions with noncapillary endothelium; and that migration of neutrophils to alveoli can occur despite deficiency or inhibition of all of the known selectins.
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Affiliation(s)
- J P Mizgerd
- Physiology Program, Harvard School of Public Health, Boston, Massachusetts 02115, USA
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