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Daidone M, Del Cuore A, Casuccio A, Di Chiara T, Guggino G, Di Raimondo D, Puleo MG, Ferrante A, Scaglione R, Pinto A, Tuttolomondo A. Vascular health in subjects with rheumatoid arthritis: assessment of endothelial function indices and serum biomarkers of vascular damage. Intern Emerg Med 2023; 18:467-475. [PMID: 36692587 DOI: 10.1007/s11739-023-03192-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 01/02/2023] [Indexed: 01/25/2023]
Abstract
BACKGROUND The cardiovascular risk (CVD) in patients with rheumatoid arthritis (RA) is 1.5-2 times higher than that in individuals of the same age and sex. AIMS To analyse the degree of endothelial dysfunction, the atherogenic immunoinflammatory serum background and the relationships among some vascular indices, cardiovascular comorbidities, and cognitive performance in subjects with RA. PATIENTS AND METHODS All consecutive patients with a rheumatoid arthritis diagnosis admitted to the Rheumatology Ward of "Policlinico Paolo Giaccone" Hospital of Palermo were enrolled from July 2019 to September 2020. We evaluated our patients' cognitive functions by administering the Mini-Mental State Examination (MMSE). Reactive Hyperaemia Index (RHI) was evaluated for assessment of endothelial function. Serum levels of angiopoietin 2, osteopontin and pentraxin 3 were assessed by blood collection. RESULTS Fifty-eight consecutive patients with RA and 40 control subjects were analysed. RA patients showed significantly lower mean RHI values, significantly higher mean Augmentation Index (AIX) values and significantly lower mean Mini-Mental State Examination (MMSE) score values than the control group. Patients with rheumatoid arthritis also showed higher mean serum values of pentraxin 3 and angiopoietin 2 than healthy controls. Multivariate logistic regression analysis showed a significant association between pentraxin 3 and angiopoietin 2 and the presence of RA. DISCUSSION Angiopoietin 2 and pentraxin 3 could be considered surrogate biomarkers of endothelial activation and vascular disease, as they could play an essential role in the regulation of endothelial integrity and inflammation.
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Affiliation(s)
- Mario Daidone
- U.O. C di Medicina Interna con Stroke Care, Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro", (ProMise), Università degli Studi di Palermo, Piazza delle Cliniche N.2, 90127, Palermo, Italy
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro"(ProMise), Università degli Studi di Palermo, Palermo, Italy
| | - Alessandro Del Cuore
- U.O. C di Medicina Interna con Stroke Care, Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro", (ProMise), Università degli Studi di Palermo, Piazza delle Cliniche N.2, 90127, Palermo, Italy
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro"(ProMise), Università degli Studi di Palermo, Palermo, Italy
| | - Alessandra Casuccio
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro"(ProMise), Università degli Studi di Palermo, Palermo, Italy
| | - Tiziana Di Chiara
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro"(ProMise), Università degli Studi di Palermo, Palermo, Italy
| | - Giuliana Guggino
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro"(ProMise), Università degli Studi di Palermo, Palermo, Italy
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro", U. O di Reumatologia, Palermo, Italy
| | - Domenico Di Raimondo
- U.O. C di Medicina Interna con Stroke Care, Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro", (ProMise), Università degli Studi di Palermo, Piazza delle Cliniche N.2, 90127, Palermo, Italy
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro"(ProMise), Università degli Studi di Palermo, Palermo, Italy
| | - Maria Grazia Puleo
- U.O. C di Medicina Interna con Stroke Care, Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro", (ProMise), Università degli Studi di Palermo, Piazza delle Cliniche N.2, 90127, Palermo, Italy
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro"(ProMise), Università degli Studi di Palermo, Palermo, Italy
| | - Angelo Ferrante
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro"(ProMise), Università degli Studi di Palermo, Palermo, Italy
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro", U. O di Reumatologia, Palermo, Italy
| | - Rosario Scaglione
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro"(ProMise), Università degli Studi di Palermo, Palermo, Italy
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro", U. O di Reumatologia, Palermo, Italy
| | - Antonio Pinto
- U.O. C di Medicina Interna con Stroke Care, Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro", (ProMise), Università degli Studi di Palermo, Piazza delle Cliniche N.2, 90127, Palermo, Italy
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro"(ProMise), Università degli Studi di Palermo, Palermo, Italy
| | - Antonino Tuttolomondo
- U.O. C di Medicina Interna con Stroke Care, Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro", (ProMise), Università degli Studi di Palermo, Piazza delle Cliniche N.2, 90127, Palermo, Italy.
- Dipartimento Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro"(ProMise), Università degli Studi di Palermo, Palermo, Italy.
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Shabani Z, Schuerger J, Su H. Cellular loci involved in the development of brain arteriovenous malformations. Front Hum Neurosci 2022; 16:968369. [PMID: 36211120 PMCID: PMC9532630 DOI: 10.3389/fnhum.2022.968369] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 08/31/2022] [Indexed: 11/13/2022] Open
Abstract
Brain arteriovenous malformations (bAVMs) are abnormal vessels that are prone to rupture, causing life-threatening intracranial bleeding. The mechanism of bAVM formation is poorly understood. Nevertheless, animal studies revealed that gene mutation in endothelial cells (ECs) and angiogenic stimulation are necessary for bAVM initiation. Evidence collected through analyzing bAVM specimens of human and mouse models indicate that cells other than ECs also are involved in bAVM pathogenesis. Both human and mouse bAVMs vessels showed lower mural cell-coverage, suggesting a role of pericytes and vascular smooth muscle cells (vSMCs) in bAVM pathogenesis. Perivascular astrocytes also are important in maintaining cerebral vascular function and take part in bAVM development. Furthermore, higher inflammatory cytokines in bAVM tissue and blood demonstrate the contribution of inflammatory cells in bAVM progression, and rupture. The goal of this paper is to provide our current understanding of the roles of different cellular loci in bAVM pathogenesis.
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Affiliation(s)
- Zahra Shabani
- Center for Cerebrovascular Research, University of California, San Francisco, San Francisco, CA, United States
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA, United States
| | - Joana Schuerger
- Center for Cerebrovascular Research, University of California, San Francisco, San Francisco, CA, United States
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA, United States
| | - Hua Su
- Center for Cerebrovascular Research, University of California, San Francisco, San Francisco, CA, United States
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA, United States
- *Correspondence: Hua Su, ; orcid.org/0000-0003-1566-9877
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Kabala PA, Malvar-Fernández B, Lopes AP, Carvalheiro T, Hartgring SAY, Tang MW, Conde C, Baeten DL, Sleeman M, Tak PP, Connor J, Radstake TR, Reedquist KA, García S. Promotion of macrophage activation by Tie2 in the context of the inflamed synovia of rheumatoid arthritis and psoriatic arthritis patients. Rheumatology (Oxford) 2020; 59:426-438. [PMID: 31377797 PMCID: PMC7571483 DOI: 10.1093/rheumatology/kez315] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 06/24/2019] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVE To examine the role of Tie2 signalling in macrophage activation within the context of the inflammatory synovial microenvironment present in patients with RA and PsA. METHODS Clinical responses and macrophage function were examined in wild-type and Tie2-overexpressing (Tie2-TG) mice in the K/BxN serum transfer model of arthritis. Macrophages derived from peripheral blood monocytes from healthy donors, RA and PsA patients, and RA and PsA synovial tissue explants were stimulated with TNF (10 ng/ml), angiopoietin (Ang)-1 or Ang-2 (200 ng/ml), or incubated with an anti-Ang2 neutralizing antibody. mRNA and protein expression of inflammatory mediators was analysed by quantitative PCR, ELISA and Luminex. RESULTS Tie2-TG mice displayed more clinically severe arthritis than wild-type mice, accompanied by enhanced joint expression of IL6, IL12B, NOS2, CCL2 and CXCL10, and activation of bone marrow-derived macrophages in response to Ang-2 stimulation. Ang-1 and Ang-2 significantly enhanced TNF-induced expression of pro-inflammatory cytokines and chemokines in macrophages from healthy donors differentiated with RA and PsA SF and peripheral blood-derived macrophages from RA and PsA patients. Both Ang-1 and Ang-2 induced the production of IL-6, IL-12p40, IL-8 and CCL-3 in synovial tissue explants of RA and PsA patients, and Ang-2 neutralization suppressed the production of IL-6 and IL-8 in the synovial tissue of RA patients. CONCLUSION Tie2 signalling enhances TNF-dependent activation of macrophages within the context of ongoing synovial inflammation in RA and PsA, and neutralization of Tie2 ligands might be a promising therapeutic target in the treatment of these diseases.
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Affiliation(s)
- Pawel A Kabala
- Department of Rheumatology and Clinical Immunology, University of Utrecht, Utrecht
- Laboratory of Translational Immunology, University Medical Center Utrecht, University of Utrecht, Utrecht
| | - Beatriz Malvar-Fernández
- Department of Rheumatology and Clinical Immunology, University of Utrecht, Utrecht
- Laboratory of Translational Immunology, University Medical Center Utrecht, University of Utrecht, Utrecht
| | - Ana P Lopes
- Department of Rheumatology and Clinical Immunology, University of Utrecht, Utrecht
- Laboratory of Translational Immunology, University Medical Center Utrecht, University of Utrecht, Utrecht
| | - Tiago Carvalheiro
- Department of Rheumatology and Clinical Immunology, University of Utrecht, Utrecht
- Laboratory of Translational Immunology, University Medical Center Utrecht, University of Utrecht, Utrecht
| | - Sarita A Y Hartgring
- Department of Rheumatology and Clinical Immunology, University of Utrecht, Utrecht
- Laboratory of Translational Immunology, University Medical Center Utrecht, University of Utrecht, Utrecht
| | - Man Wai Tang
- Department of Experimental Immunology, University of Amsterdam, Amsterdam, The Netherlands
- Department of Clinical Immunology and Rheumatology, University of Amsterdam, Amsterdam, The Netherlands
| | - Carmen Conde
- Laboratorio de Investigación 8 y Servicio de Reumatología, Instituto de Investigación Sanitaria (IDIS), Hospital Clínico Universitario de Santiago de Compostela (CHUS), SERGAS, Santiago de Compostela, Spain
| | - Dominique L Baeten
- Department of Experimental Immunology, University of Amsterdam, Amsterdam, The Netherlands
- Department of Clinical Immunology and Rheumatology, University of Amsterdam, Amsterdam, The Netherlands
| | | | - Paul P Tak
- Department of Clinical Immunology and Rheumatology, University of Amsterdam, Amsterdam, The Netherlands
- GlaxoSmithKline, Stevenage
- Department of Medicine, University of Cambridge, Cambridge, UK
| | | | - Timothy R Radstake
- Department of Rheumatology and Clinical Immunology, University of Utrecht, Utrecht
- Laboratory of Translational Immunology, University Medical Center Utrecht, University of Utrecht, Utrecht
| | - Kris A Reedquist
- Department of Rheumatology and Clinical Immunology, University of Utrecht, Utrecht
- Laboratory of Translational Immunology, University Medical Center Utrecht, University of Utrecht, Utrecht
| | - Samuel García
- Department of Rheumatology and Clinical Immunology, University of Utrecht, Utrecht
- Laboratory of Translational Immunology, University Medical Center Utrecht, University of Utrecht, Utrecht
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Matkar PN, Ariyagunarajah R, Leong-Poi H, Singh KK. Friends Turned Foes: Angiogenic Growth Factors beyond Angiogenesis. Biomolecules 2017; 7:biom7040074. [PMID: 28974056 PMCID: PMC5745456 DOI: 10.3390/biom7040074] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 09/15/2017] [Accepted: 09/22/2017] [Indexed: 12/13/2022] Open
Abstract
Angiogenesis, the formation of new blood vessels from pre-existing ones is a biological process that ensures an adequate blood flow is maintained to provide the cells with a sufficient supply of nutrients and oxygen within the body. Numerous soluble growth factors and inhibitors, cytokines, proteases as well as extracellular matrix proteins and adhesion molecules stringently regulate the multi-factorial process of angiogenesis. The properties and interactions of key angiogenic molecules such as vascular endothelial growth factors (VEGFs), fibroblast growth factors (FGFs) and angiopoietins have been investigated in great detail with respect to their molecular impact on angiogenesis. Since the discovery of angiogenic growth factors, much research has been focused on their biological actions and their potential use as therapeutic targets for angiogenic or anti-angiogenic strategies in a context-dependent manner depending on the pathologies. It is generally accepted that these factors play an indispensable role in angiogenesis. However, it is becoming increasingly evident that this is not their only role and it is likely that the angiogenic factors have important functions in a wider range of biological and pathological processes. The additional roles played by these molecules in numerous pathologies and biological processes beyond angiogenesis are discussed in this review.
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Affiliation(s)
- Pratiek N Matkar
- Division of Cardiology, Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Toronto, ON M5B 1W8, Canada.
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada.
| | | | - Howard Leong-Poi
- Division of Cardiology, Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Toronto, ON M5B 1W8, Canada.
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada.
| | - Krishna K Singh
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada.
- Division of Vascular Surgery, Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Toronto, ON M5B 1W8, Canada.
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON M5S 1A8, Canada.
- Department of Surgery, University of Toronto, Toronto, ON M5S 1A8, Canada.
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Disruption of vascular endothelial homeostasis in systemic juvenile idiopathic arthritis-associated macrophage activation syndrome: The dynamic roles of angiopoietin-1 and -2. Cytokine 2016; 80:1-6. [DOI: 10.1016/j.cyto.2016.02.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 01/14/2016] [Accepted: 02/15/2016] [Indexed: 11/16/2022]
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Evening primrose oil and celecoxib inhibited pathological angiogenesis, inflammation, and oxidative stress in adjuvant-induced arthritis: novel role of angiopoietin-1. Inflammopharmacology 2014; 22:305-17. [DOI: 10.1007/s10787-014-0200-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Accepted: 02/19/2014] [Indexed: 01/22/2023]
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Nakajima K, Shibata Y, Hishikawa Y, Suematsu T, Mori M, Fukuhara S, Koji T, Sawase T, Ikeda T. Coexpression of ang1 and tie2 in odontoblasts of mouse developing and mature teeth-a new insight into dentinogenesis. Acta Histochem Cytochem 2014; 47:19-25. [PMID: 24761046 PMCID: PMC3972426 DOI: 10.1267/ahc.13043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 01/27/2014] [Indexed: 11/30/2022] Open
Abstract
Angiopoietin-1 regulates vascular angiogenesis and stabilization, and is reported to promote bone formation by facilitating angiogenesis. To estimate the role of Ang1 in odontogenesis, we explored the distribution of Ang1 and the receptor, Tie2 in the mouse developing and mature first molar of the mandible. At embryonic day 18, when differentiation of odontoblasts begins, immunosignals for Ang1 were intensely detected in the basement membrane and the distal side, which faced the basement membrane of odontoblasts. In situ hybridization revealed that Ang1 was expressed in odontoblasts and ameloblasts facing the basement membrane. Tie2 was localized in the distal side of odontoblasts. After birth, Ang1 was detected in the predentin, whereas both Ang1 and Tie2 were colocalized in odontoblasts and odontoblast processes. These distributions were retained up to 8 weeks. In contrast to odontoblasts, ameloblasts, cementoblasts and osteoblasts expressed Ang1 but did not express Tie2. Colocalization of Ang1 and Tie2 in odontoblasts and selective expression of Tie2 in odontoblasts among cells responsible for calcified tissue formation suggested the involvement of autocrine signals of Ang1-Tie2 in dentinogenesis.
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Affiliation(s)
- Kazunori Nakajima
- Department of Applied Prosthodontics, Nagasaki University Graduate School of Biomedical Sciences
| | - Yasuaki Shibata
- Department of Oral Pathology and Bone Metabolism, Nagasaki University Graduate School of Biomedical Sciences
| | - Yoshitaka Hishikawa
- Department of Histology and Cell Biology, Nagasaki University Graduate School of Biomedical Sciences
- Present address: Division of Histochemistry and Cell Biology, Department of Anatomy, Faculty of Medicine, University of Miyazaki
| | - Takashi Suematsu
- Central Electron Microscope Laboratory, Nagasaki University Graduate School of Biomedical Sciences
| | - Masako Mori
- Department of Cell Biology, Nagasaki University Graduate School of Biomedical Sciences
| | - Shigetomo Fukuhara
- Department of Cell Biology, National Cerebral and Cardiovascular Center Research Institute
| | - Takehiko Koji
- Department of Histology and Cell Biology, Nagasaki University Graduate School of Biomedical Sciences
| | - Takashi Sawase
- Department of Applied Prosthodontics, Nagasaki University Graduate School of Biomedical Sciences
| | - Tohru Ikeda
- Department of Oral Pathology and Bone Metabolism, Nagasaki University Graduate School of Biomedical Sciences
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van de Sande MGH, de Launay D, de Hair MJH, García S, van de Sande GPM, Wijbrandts CA, Gerlag DM, Reedquist KA, Tak PP. Local synovial engagement of angiogenic TIE-2 is associated with the development of persistent erosive rheumatoid arthritis in patients with early arthritis. ACTA ACUST UNITED AC 2014; 65:3073-83. [PMID: 23982963 DOI: 10.1002/art.38128] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE To examine the role of vascular endothelial growth factor (VEGF) and angiopoietin signaling in the diagnosis and disease outcome of patients with early arthritis. METHODS Fifty patients with early arthritis (disease duration <1 year) who had not been treated with disease-modifying antirheumatic drugs (DMARDs) were monitored prospectively and were classified at baseline and after 2 years as having undifferentiated arthritis (UA), rheumatoid arthritis (RA), or spondyloarthritis (SpA). All patients underwent arthroscopic synovial biopsy at baseline. Synovial expression of VEGF, VEGF receptor, angiopoietin 1 (Ang-1), Ang-2, TIE-2, and activated p-TIE-2 was evaluated by immunohistochemistry. Serum levels of VEGF, Ang-1, and Ang-2 were measured by enzyme-linked immunosorbent assay. Secreted products of macrophages stimulated with Ang-1 and Ang-2 were measured using a multiplex system. RESULTS Expression of Ang-1 was comparable between the patients with RA at baseline and patients with UA who fulfilled the criteria for RA over time (UA/RA), and it was significantly higher in patients with RA (P < 0.05) or UA/RA (P < 0.005) than in patients with SpA. TIE-2 and p-TIE-2 were more highly expressed in patients with RA (P < 0.005) or UA/RA (P < 0.05) than in patients with SpA. Ang-1 significantly enhanced the tumor necrosis factor-dependent macrophage production of cytokines and chemokines that are known to be elevated in the synovial fluid of patients with early RA. In RA, relative TIE-2 activation predicted the development of erosive disease (R(2) = 0.35, P < 0.05). CONCLUSION Local engagement of synovial TIE-2 is observed during the earliest phases of RA, suggesting that TIE-2 signaling may contribute to disease development and progression or may indicate an attempt to protect against these processes. Early therapeutic targeting of TIE-2 signaling may be useful in improving outcome in arthritis.
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Maruotti N, Cantatore FP, Ribatti D. Putative effects of potentially anti-angiogenic drugs in rheumatic diseases. Eur J Clin Pharmacol 2013; 70:135-40. [PMID: 24196651 DOI: 10.1007/s00228-013-1605-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 10/15/2013] [Indexed: 11/27/2022]
Abstract
A role for angiogenesis has been described in several rheumatic diseases, including rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, systemic sclerosis, systemic lupus erythematosus, vasculitides, and osteoarthritis, leading to the possibility that angiogenesis inhibition may be an additional useful therapeutic arm. While the role of anti-angiogenic therapy in rheumatoid arthritis has received attention, it is conceivable that the inhibition of pathological angiogenesis may also be a useful therapeutical approach in other rheumatic diseases. Numerous compounds, such as, for example, various interleukins, antibodies directed against angiogenic factors, peptides, estrogen metabolites, disease-modifying anti-rheumatic drugs, have been found to have anti-angiogenic properties. However, additional research is needed to obtain a clear understanding of the pathogenic mechanism of angiogenesis and the potential applications of anti-angiogenic therapy in rheumatic diseases.
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Affiliation(s)
- Nicola Maruotti
- Rheumatology Clinic, Department of Medical and Surgical Sciences, University of Foggia Medical School, Foggia, Italy
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Kayakabe K, Kuroiwa T, Sakurai N, Ikeuchi H, Kadiombo AT, Sakairi T, Matsumoto T, Maeshima A, Hiromura K, Nojima Y. Interleukin-6 promotes destabilized angiogenesis by modulating angiopoietin expression in rheumatoid arthritis. Rheumatology (Oxford) 2012; 51:1571-9. [DOI: 10.1093/rheumatology/kes093] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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Dumas E, Martel C, Neagoe PE, Bonnefoy A, Sirois MG. Angiopoietin-1 but not angiopoietin-2 promotes neutrophil viability: Role of interleukin-8 and platelet-activating factor. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2012; 1823:358-67. [DOI: 10.1016/j.bbamcr.2011.12.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 12/06/2011] [Accepted: 12/07/2011] [Indexed: 01/15/2023]
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Toll-like receptor 2 induced angiogenesis and invasion is mediated through the Tie2 signalling pathway in rheumatoid arthritis. PLoS One 2011; 6:e23540. [PMID: 21858161 PMCID: PMC3157402 DOI: 10.1371/journal.pone.0023540] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Accepted: 07/20/2011] [Indexed: 12/16/2022] Open
Abstract
Background Angiogenesis is a critical early event in inflammatory arthritis, facilitating leukocyte migration into the synovium resulting in invasion and destruction of articular cartilage and bone. This study investigates the effect of TLR2 on angiogenesis, EC adhesion and invasion using microvascular endothelial cells and RA whole tissue synovial explants ex-vivo. Methods Microvascular endothelial cells (HMVEC) and RA synovial explants ex vivo were cultured with the TLR2 ligand, Pam3CSK4 (1 µg/ml). Angiopoietin 2 (Ang2), Tie2 and TLR2 expression in RA synovial tissue was assessed by immunohistology. HMVEC tube formation was assessed using Matrigel matrix assays. Ang2 was measured by ELISA. ICAM-1 cell surface expression was assessed by flow cytometry. Cell migration was assessed by wound repair scratch assays. ECM invasion, MMP-2 and -9 expression were assessed using transwell invasion chambers and zymography. To examine if the angiopoietin/Tie2 signalling pathway mediates TLR2 induced EC tube formation, invasion and migration assays were performed in the presence of a specific neutralising anti-Tie2mAb (10 ug/ml) and matched IgG isotype control Ab (10 ug/ml). Results Ang2 and Tie2 were localised to RA synovial blood vessels, and TLR2 was localised to RA synovial blood vessels, sub-lining infiltrates and the lining layer. Pam3CSK4 significantly increased angiogenenic tube formation (p<0.05), and upregulated Ang2 production in HMVEC (p<0.05) and RA synovial explants (p<0.05). Pam3CSK4 induced cell surface expression of ICAM-1, from basal level of 149±54 (MFI) to 617±103 (p<0.01). TLR-2 activation induced an 8.8±2.8 fold increase in cell invasion compared to control (p<0.05). Pam3CSK4 also induced HMVEC cell migration and induced MMP-2 and -9 from RA synovial explants. Neutralisation of the Ang2 receptor, Tie2 significantly inhibited Pam3CSK4-induced EC tube formation and invasion (p<0.05). Conclusion TLR2 activation promotes angiogenesis, cell adhesion and invasion, effects that are in part mediated through the Tie2 signalling pathway, key mechanisms involved in the pathogenesis of RA.
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Neagoe PE, Brkovic A, Hajjar F, Sirois MG. Expression and release of angiopoietin-1 from human neutrophils: intracellular mechanisms. Growth Factors 2009; 27:335-44. [PMID: 19919521 DOI: 10.3109/08977190903155043] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We recently demonstrated that Tie2 receptor activation on human neutrophils by both angiopoietins (Ang1 and Ang2) promoted platelet-activating factor synthesis, beta(2)-integrin activation, and cell migration. Herein, we wanted to assess if human neutrophils express angiopoietins and further delineate their mechanisms of release. Employing Reverse transcriptase-polymerase chain reaction, Real time quantitative transcriptase-polymerase chain reaction, FACScan analysis and ELISA approaches, we observed that neutrophils express Ang1 but not Ang2. For each condition, vascular endothelial growth factor (VEGF) detection was performed as positive control. Using nitrogen cavitation, we observed that Ang1 is localized in the cytosolic fraction whereas VEGF is found in beta-granules. Treatment of neutrophils with phorbol myristate acetate (PMA), N-Formyl-Met-Leu-Phe (fMLP) and tumor necrosis factor-alpha (TNF-alpha) induced VEGF release. Maximal effect was observed with PMA (80 nM) stimulation inducing a complete release of VEGF content (565 +/- 100 pg/ml; 6 x 10(6) neutrophils), corresponding to a 18.9-fold increase as compared to phosphate buffer saline (PBS) treated neutrophils. By contrast, only a treatment with PMA (80 nM) induced Ang1 release. PMA treatment induced also a complete release of Ang1 (661 +/- 148 pg/ml; 6 x 10(6) neutrophils), corresponding to 2.8-fold increase as compared to PBS-treated neutrophils. In both cases, PMA-mediated release of VEGF and Ang1 was nearly maximal by 15 min. Finally, we observed that the induction of Ang1 release was calcium-independent whereas VEGF release was not. These data demonstrate the capacity of human neutrophils to synthesize Ang1, which is stored and released differently as compared to VEGF. These data suggest a different cascade of events regarding the distribution of selected growth factors during inflammation and angiogenesis.
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Affiliation(s)
- Paul-Eduard Neagoe
- Montreal Heart Institute, Research Center and Department of Pharmacology, Université de Montréal, Montreal, QC, Canada
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14
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Lefèvre S, Knedla A, Tennie C, Kampmann A, Wunrau C, Dinser R, Korb A, Schnäker EM, Tarner IH, Robbins PD, Evans CH, Stürz H, Steinmeyer J, Gay S, Schölmerich J, Pap T, Müller-Ladner U, Neumann E. Synovial fibroblasts spread rheumatoid arthritis to unaffected joints. Nat Med 2009; 15:1414-20. [PMID: 19898488 PMCID: PMC3678354 DOI: 10.1038/nm.2050] [Citation(s) in RCA: 462] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2008] [Accepted: 09/21/2009] [Indexed: 01/29/2023]
Abstract
Active rheumatoid arthritis originates from few joints but subsequently affects the majority of joints. Thus far, the pathways of the progression of the disease are largely unknown. As rheumatoid arthritis synovial fibroblasts (RASFs) which can be found in RA synovium are key players in joint destruction and are able to migrate in vitro, we evaluated the potential of RASFs to spread the disease in vivo. To simulate the primary joint of origin, we implanted healthy human cartilage together with RASFs subcutaneously into severe combined immunodeficient (SCID) mice. At the contralateral flank, we implanted healthy cartilage without cells. RASFs showed an active movement to the naive cartilage via the vasculature independent of the site of application of RASFs into the SCID mouse, leading to a marked destruction of the target cartilage. These findings support the hypothesis that the characteristic clinical phenomenon of destructive arthritis spreading between joints is mediated, at least in part, by the transmigration of activated RASFs.
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Affiliation(s)
- Stephanie Lefèvre
- Department of Internal Medicine and Rheumatology, Justus-Liebig-University Giessen, Kerckhoff-Clinic, Bad Nauheim, Germany
| | - Anette Knedla
- Department of Internal Medicine and Rheumatology, Justus-Liebig-University Giessen, Kerckhoff-Clinic, Bad Nauheim, Germany
| | - Christoph Tennie
- Department of Internal Medicine and Rheumatology, Justus-Liebig-University Giessen, Kerckhoff-Clinic, Bad Nauheim, Germany
| | - Andreas Kampmann
- Department of Internal Medicine and Rheumatology, Justus-Liebig-University Giessen, Kerckhoff-Clinic, Bad Nauheim, Germany
| | - Christina Wunrau
- Institute of Experimental Muskuloskeletal Medicine, University Hospital Muenster, Germany
| | - Robert Dinser
- Department of Internal Medicine and Rheumatology, Justus-Liebig-University Giessen, Kerckhoff-Clinic, Bad Nauheim, Germany
| | - Adelheid Korb
- Department of Internal Medicine D, Nephrology and Rheumatology, University Hospital Muenster, Germany
| | | | - Ingo H. Tarner
- Department of Internal Medicine and Rheumatology, Justus-Liebig-University Giessen, Kerckhoff-Clinic, Bad Nauheim, Germany
| | - Paul D. Robbins
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, School of Medicine, Pittsburgh, PA, USA
| | | | - Henning Stürz
- Department of Orthopedics and Orthopedic Surgery, University Hospital Giessen and Marburg, Giessen, Germany
| | - Jürgen Steinmeyer
- Deptment of Orthopedics and Experimental Orthopedics, University Hospital Giessen and Marburg Giessen, Germany
| | - Steffen Gay
- Center for Experimental Rheumatology, Zürich Center for Integrative Human Physiology, USZ, Zürich, Switzerland
| | | | - Thomas Pap
- Institute of Experimental Muskuloskeletal Medicine, University Hospital Muenster, Germany
| | - Ulf Müller-Ladner
- Department of Internal Medicine and Rheumatology, Justus-Liebig-University Giessen, Kerckhoff-Clinic, Bad Nauheim, Germany
| | - Elena Neumann
- Department of Internal Medicine and Rheumatology, Justus-Liebig-University Giessen, Kerckhoff-Clinic, Bad Nauheim, Germany
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15
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Müller-Ladner U, Ospelt C, Gay S, Distler O, Pap T. Cells of the synovium in rheumatoid arthritis. Synovial fibroblasts. Arthritis Res Ther 2008; 9:223. [PMID: 18177509 PMCID: PMC2246247 DOI: 10.1186/ar2337] [Citation(s) in RCA: 167] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
For some time synovial fibroblasts have been regarded simply as innocent synovial cells, mainly responsible for synovial homeostasis. During the past decade, however, a body of evidence has accumulated illustrating that rheumatoid arthritis synovial fibroblasts (RASFs) are active drivers of joint destruction in rheumatoid arthritis. Details regarding the intracellular signalling cascades that result in long-term activation and synthesis of proinflammatory molecules and matrix-degrading enzymes by RASFs have been analyzed. Molecular, cellular and animal studies have identified various interactions with other synovial and inflammatory cells. This expanded knowledge of the distinct role played by RASFs in the pathophysiology of rheumatoid arthritis has moved these fascinating cells to the fore, and work to identify targeted therapies to inhibit their joint destructive potential is underway.
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Affiliation(s)
- Ulf Müller-Ladner
- Justus-Liebig-University Giessen, Department of Rheumatology and Clinical Immunology, Kerckhoff-Clinic Bad Nauheim, Benekestrasse, D-61231 Bad Nauheim, Germany.
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16
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Makinde T, Agrawal DK. Intra and extravascular transmembrane signalling of angiopoietin-1-Tie2 receptor in health and disease. J Cell Mol Med 2008; 12:810-28. [PMID: 18266978 PMCID: PMC4401129 DOI: 10.1111/j.1582-4934.2008.00254.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Angiopoietin-1 (Ang-1) is the primary agonist for Tie2 tyrosine kinase receptor (Tie2), and the effect of Ang-1-Tie2 signalling is context-dependent. Deficiency in either Ang-1 or Tie2 protein leads to severe microvascular defects and subsequent embryonic lethality in murine model. Tie2 receptors are expressed in several cell types, including endothelial cells, smooth muscle cells, fibroblasts, epithelial cells, monocytes, neutrophils, eosinophils and glial cells. Ang-1-Tie2 signalling induces a chemotactic effect in smooth muscle cells, neutrophils and eosinophils, and induces differentiation of mesenchymal cells to smooth muscle cells. Additionally, this signalling pathway induces the secretion of serotonin, matrix metalloproteinases (MMPs) and plasmin. Ang-1 inhibits the secretion of tissue inhibitor of matrix metalloproteinase (TIMPs). Aberrant expression and activity of Tie2 in vascular and non-vascular cells may result in the development of rheumatoid arthritis, cancer, hypertension and psoriasis. Ang-1 has an anti-inflammatory effect, when co-localized with vascular endothelial growth factor (VEGF) in the vasculature. Thus, Ang-1 could be potentially important in the therapy of various pathological conditions such as pulmonary hypertension, arteriosclerosis and diabetic retinopathy. In this article, we have summarized and critically reviewed the pathophysiological role of Ang-1-Tie2 signalling pathway.
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Affiliation(s)
- T Makinde
- Department of Biomedical Sciences, Creighton University School of Medicine, Omaha, NE 68178, USA
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17
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Nakayama T, Inaba M, Naito S, Mihara Y, Miura S, Taba M, Yoshizaki A, Wen CY, Sekine I. Expression of Angiopoietin-1, 2 and 4 and Tie-1 and 2 in gastrointestinal stromal tumor, leiomyoma and schwannoma. World J Gastroenterol 2007; 13:4473-9. [PMID: 17724803 PMCID: PMC4611580 DOI: 10.3748/wjg.v13.i33.4473] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the role of angiopoietin (Ang) -1, -2 and -4 and its receptors, Tie-1 and -2, in the growth and differentiation of gastrointestinal stromal tumors (GISTs).
METHODS: Thirty GISTs, seventeen leiomyomas and six schwannomas were examined by immunohistochemistry in this study.
RESULTS: Ang-1, -2 and -4 proteins were expressed in the cytoplasm of tumor cells, and Tie-1 and -2 were expressed both in the cytoplasm and on the membrane of all tumors. Immunohistochemical staining revealed that 66.7% of GISTs (20 of 30), 76.5% of leiomyomas (13 of 17) and 83.3% of schwannomas (5 of 6) were positive for Ang-1. 83.3% of GISTs (25 of 30), 82.4% of leiomyomas (14 of 17) and 100% of schwannomas (6 of 6) were positive for Ang-2. 36.7% of GISTs (11 of 30), 58.8% of leiomyomas (10 of 17) and 83.3% of schwannomas (5 of 6) were positive for Ang-4. 60.0% of GISTs (18 of 30), 82.4% of leiomyomas and 100% of schwannomas (6 of 6) were positive for Tie-1. 10.0% of GISTs (3 of 30), 94.1% of leiomyomas (16 of 17) and 33.3% of schwannomas (2 of 6) were positive for Tie-2. Tie-2 expression was statistically different between GISTs and leiomyomas (P < 0.001). However, there was no correlation between expression of angiopoietin pathway components and clinical risk categories.
CONCLUSION: Our results suggest that the angiopoietin pathway plays an important role in the differentiation of GISTs, leiomyomas and schwannomas.
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Affiliation(s)
- Toshiyuki Nakayama
- Department of Tumor and Diagnostic Pathology, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki, Japan.
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18
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Murdoch C, Tazzyman S, Webster S, Lewis CE. Expression of Tie-2 by Human Monocytes and Their Responses to Angiopoietin-2. THE JOURNAL OF IMMUNOLOGY 2007; 178:7405-11. [PMID: 17513791 DOI: 10.4049/jimmunol.178.11.7405] [Citation(s) in RCA: 230] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Angiopoietins 1 and 2 bind to Tie-2 expressed on endothelial cells and regulate vessel stabilization and angiogenesis. Tie-2(+) monocytes have been shown to be recruited to experimental tumors where they promote tumor angiogenesis. In this study, we show that 20% of CD14(+) human blood monocytes express Tie-2, and that these cells coexpress CD16 (FcgammaRIII) and are predominantly CD34 negative. Ang-2 is up-regulated by endothelial cells in malignant tumors and inflamed tissues, so our finding that Ang-2 is a chemoattractant for human Tie-2(+) monocytes and macrophages, suggests that it may help to recruit and regulate their distribution in such tissues. Ang-2 was also found to markedly inhibit release of the important proinflammatory cytokine, TNF-alpha, by monocytes in vitro. Following extravasation of monocytes, and their differentiation into macrophages, many accumulate in the hypoxic areas of inflamed and malignant tissues. Ang-2 is known to be up-regulated by hypoxia and we show that monocytes and macrophages up-regulate Tie-2 when exposed to hypoxia. Furthermore, hypoxia augmented the inhibitory effect of Ang-2 on the release of the anti-angiogenic cytokine, IL-12 by monocytes. In sum, our data indicate that Ang-2 may recruit Tie-2(+) monocytes to tumors and sites of inflammation, modulate their release of important cytokines and stimulate them to express a proangiogenic phenotype.
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MESH Headings
- Angiopoietin-2/physiology
- Animals
- Cell Hypoxia/immunology
- Cell Membrane/enzymology
- Cell Membrane/immunology
- Cell Membrane/pathology
- Cells, Cultured
- Chemotaxis, Leukocyte/immunology
- Cytokines/antagonists & inhibitors
- Cytokines/metabolism
- Gene Expression Regulation/immunology
- Granulocytes/enzymology
- Granulocytes/metabolism
- Granulocytes/pathology
- Humans
- Inflammation Mediators/physiology
- Lymphocyte Subsets/enzymology
- Lymphocyte Subsets/metabolism
- Lymphocyte Subsets/pathology
- Macrophages/enzymology
- Macrophages/metabolism
- Macrophages/pathology
- Mice
- Monocytes/enzymology
- Monocytes/metabolism
- Monocytes/pathology
- Neoplasms, Experimental/blood supply
- Neoplasms, Experimental/enzymology
- Neoplasms, Experimental/pathology
- Neovascularization, Pathologic/immunology
- RNA, Messenger/biosynthesis
- RNA, Messenger/genetics
- Receptor, TIE-2/biosynthesis
- Receptor, TIE-2/genetics
- Receptor, TIE-2/physiology
- Up-Regulation/immunology
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Affiliation(s)
- Craig Murdoch
- Tumor Targeting Group, Academic Unit of Pathology, Division of Genomic Medicine, The Sir Henry Wellcome Laboratories for Medical Research, University of Sheffield Medical School, Sheffield, United Kingdom
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19
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Abstract
Cough is an important defensive reflex of the airway and also a common symptom of respiratory disease. Cough after common respiratory virus infection is transient but is more persistent when associated with conditions such as asthma, rhinosinusitis, gastro-oesophageal reflux, chronic obstructive pulmonary disease and lung cancer. Persistent cough may be due to peripheral and/or central sensitisation of cough reflexes initiated by cough receptors, rapidly adapting receptors or nociceptors. Treatment directed at associated conditions such as asthma (with anti-inflammatories) and gastro-oesophageal reflux (with proton-pump inhibitors) improve cough. There remains a need to use drugs that suppress the neural activity of cough (termed nonspecific), as treatments directed at the clinical cause(s) of the underlying cough (termed specific) may not be effective. The most effective indirect antitussives are opioids such as morphine, codeine or pholcodeine, but they produce side effects such as drowsiness, nausea, constipation and physical dependence. Opioids such as kappa- and delta-receptor agonists, non-opioids such as nociceptin, neurokinin and bradykinin receptor antagonists, cannabinoids, vanilloid receptor-1 antagonists, blockers of Na+-dependent channels, and large conductance Ca2+-dependent K+-channel activators of afferent nerves may represent novel antitussives.
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Affiliation(s)
- K F Chung
- National Heart & Lung Institute, Imperial College & Royal Brompton Hospital, London, SW3, UK.
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20
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Müller-Ladner U, Pap T, Gay RE, Neidhart M, Gay S. Mechanisms of Disease: the molecular and cellular basis of joint destruction in rheumatoid arthritis. ACTA ACUST UNITED AC 2005; 1:102-10. [PMID: 16932639 DOI: 10.1038/ncprheum0047] [Citation(s) in RCA: 212] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2005] [Accepted: 08/23/2005] [Indexed: 01/01/2023]
Abstract
Rheumatoid arthritis is a complex systemic disease that ultimately leads to the progressive destruction of articular and periarticular structures. Novel data indicate that the innate immune system (through activation of Toll-like receptors) is involved in articular pathophysiology, including the recruitment of inflammatory cells, and that periarticular factors such as adipocytokines contribute to the perpetuation of joint inflammation. The deleterious process of joint destruction is mediated by intracellular signaling pathways involving transcription factors, such as nuclear factor kappaB, cytokines, chemokines, growth factors, cellular ligands, and adhesion molecules. Advances in molecular biology techniques have identified T-cell-independent and B-cell-independent pathways that operate at different stages of the disease. Cytokine-independent pathways appear to be responsible for maintaining basic disease activity that is not affected by currently available therapies. Using this knowledge in combination with gene-transfer and gene-silencing approaches, bench-to-bedside strategies will be developed, thus enabling the creation of novel treatments for rheumatoid arthritis.
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Affiliation(s)
- Ulf Müller-Ladner
- Department of Internal Medicine and Rheumatology, Justus-Liebig University Giessen, Kerckhoff-Clinic, Bad Nauheim, Germany
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21
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Lainer DT, Brahn E. New antiangiogenic strategies for the treatment of proliferative synovitis. Expert Opin Investig Drugs 2005; 14:1-17. [PMID: 15709917 DOI: 10.1517/13543784.14.1.1] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Angiogenesis inhibition, which has been extensively studied for the treatment of various malignancies, is beginning to emerge as a new potential therapy for proliferative synovitis, particularly rheumatoid arthritis (RA). The rheumatoid pannus, the site of inflammation and joint destruction in the rheumatoid synovium, relies on the development of new vasculature to sustain its growth. A host of mediators have been shown to induce angiogenesis at the site of the inflamed synovium; these include vascular endothelial growth factor, fibroblast growth factor, integrin alpha(V)beta3, angiopoietin, prosta-glandin E1 and prostaglandin E2, and matrix metalloproteinases. In addition, hypoxia at the site of synovial inflammation contributes to angiogenesis stimulation. Several naturally-occurring inhibitors exist, such angiostatin and endostatin. There are a number of drugs undergoing study in the treatment of proliferative synovitis, which capitalise on the correlation between angiogenesis inhibition and the reduction of signs and symptoms of RA. Paclitaxel and an anti-integrin alpha(V)beta3 antibody, LM-609, are currently in clinical trials. Other drugs that may inhibit angiogenesis in RA include TNP-470 (formerly called AGM-1470), PPI-2458, PTK-787, bevacizumab and thalidomide. Many of these drugs have shown promise for the treatment of oncologic disorders, and are now being evaluated for the treatment of proliferative synovitis.
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Affiliation(s)
- Dahlia T Lainer
- UCLA School of Medicine, Division of Rheumatology, 1000 Veteran Avenue, Room 32-59, Los Angeles, CA 90095-1670, USA
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22
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Abstract
Oxygen metabolism has an important role in the pathogenesis of rheumatoid arthritis. Reactive oxygen species (ROS) produced in the course of cellular oxidative phosphorylation, and by activated phagocytic cells during oxidative bursts, exceed the physiological buffering capacity and result in oxidative stress. The excessive production of ROS can damage protein, lipids, nucleic acids, and matrix components. They also serve as important intracellular signaling molecules that amplify the synovial inflammatory-proliferative response. Repetitive cycles of hypoxia and reoxygenation associated with changes in synovial perfusion are postulated to activate hypoxia-inducible factor-1alpha and nuclear factor-kappaB, two key transcription factors that are regulated by changes in cellular oxygenation and cytokine stimulation, and that in turn orchestrate the expression of a spectrum of genes critical to the persistence of synovitis. An understanding of the complex interactions involved in these pathways might allow the development of novel therapeutic strategies for rheumatoid arthritis.
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Affiliation(s)
- Carol A Hitchon
- Arthritis Centre and Rheumatic Diseases Research Laboratory University of Manitoba, Winnipeg, Manitoba, Canada
| | - Hani S El-Gabalawy
- Arthritis Centre and Rheumatic Diseases Research Laboratory University of Manitoba, Winnipeg, Manitoba, Canada
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