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Akwii RG, Mikelis CM. Targeting the Angiopoietin/Tie Pathway: Prospects for Treatment of Retinal and Respiratory Disorders. Drugs 2021; 81:1731-1749. [PMID: 34586603 PMCID: PMC8479497 DOI: 10.1007/s40265-021-01605-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/06/2021] [Indexed: 12/21/2022]
Abstract
Anti-angiogenic approaches have significantly advanced the treatment of vascular-related pathologies. The ephemeral outcome and known side effects of the current vascular endothelial growth factor (VEGF)-based anti-angiogenic treatments have intensified research on other growth factors. The angiopoietin/Tie (Ang/Tie) family has an established role in vascular physiology and regulates angiogenesis, vascular permeability, and inflammatory responses. The Ang/Tie family consists of angiopoietins 1-4, their receptors, tie1 and 2 and the vascular endothelial-protein tyrosine phosphatase (VE-PTP). Modulation of Tie2 activation has provided a promising outcome in preclinical models and has led to clinical trials of Ang/Tie-targeting drug candidates for retinal disorders. Although less is known about the role of Ang/Tie in pulmonary disorders, several studies have revealed great potential of the Ang/Tie family members as drug targets for pulmonary vascular disorders as well. In this review, we summarize the functions of the Ang/Tie pathway in retinal and pulmonary vascular physiology and relevant disorders and highlight promising drug candidates targeting this pathway currently being or expected to be under clinical evaluation for retinal and pulmonary vascular disorders.
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Affiliation(s)
- Racheal Grace Akwii
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, 1406 S. Coulter St., Amarillo, TX, 79106, USA
| | - Constantinos M Mikelis
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, 1406 S. Coulter St., Amarillo, TX, 79106, USA.
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2
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Radbel J, Laskin DL, Laskin JD, Kipen HM. Disease-modifying treatment of chemical threat agent-induced acute lung injury. Ann N Y Acad Sci 2020; 1480:14-29. [PMID: 32726497 DOI: 10.1111/nyas.14438] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 06/10/2020] [Accepted: 06/21/2020] [Indexed: 02/04/2023]
Abstract
Acute respiratory distress syndrome (ARDS) is a highly morbid lung pathology induced by exposure to chemical warfare agents, including vesicants, phosgene, chlorine, and ricin. In this review, we describe the pathology associated with the development of ARDS in humans and experimental models of acute lung injury following animal exposure to these high-priority threat agents. Potential future approaches to disease-modifying treatment used in preclinical animal studies, including antioxidants, anti-inflammatories, biologics, and mesenchymal stem cells, are also described. As respiratory pathologies, including ARDS, are the major cause of morbidity and mortality following exposure to chemical threat agents, understanding mechanisms of disease pathogenesis is key to the development of efficacious therapeutics beyond the primary intervention principle, which remains mechanical ventilation.
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Affiliation(s)
- Jared Radbel
- Department of Medicine, Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey
| | - Debra L Laskin
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey
| | - Jeffrey D Laskin
- Department of Environmental and Occupational Health, School of Public Health, Rutgers University, Piscataway, New Jersey
| | - Howard M Kipen
- Department of Environmental and Occupational Health, School of Public Health, Rutgers University, Piscataway, New Jersey
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3
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Halim NSS, Ch'ng ES, Kardia E, Ali SA, Radzi R, Yahaya BH. Aerosolised Mesenchymal Stem Cells Expressing Angiopoietin-1 Enhances Airway Repair. Stem Cell Rev Rep 2020; 15:112-125. [PMID: 30178289 DOI: 10.1007/s12015-018-9844-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND The aim of this study was to investigate the effects of MSCs and MSC-expressing ANGPT1 (MSC-pANGPT1) treatment via aerosolisation in alleviating the asthma-related airway inflammation in the rabbit model. METHODS Rabbits were sensitised and challenged with both intraperitoneal injection and inhalation of ovalbumin (Ova). MSCs and MSC-pANGPT1 cells were aerosolised into rabbit lungs using the MicroSprayer® Aerosolizer Model IA-1B 48 h after injury. The post mortem was performed 3 days following cell delivery. Histopathological assessments of the lung tissues and inflammatory response were quantitatively scored following treatments. RESULT(S) Administration of aerosolised MSCs and MSC-pANGPT1 were significantly reduced inflammation of the airways (p < 0.001), as reflected by improved of structural changes such as thickness of the basement membrane, epithelium, mucosa and sub-mucosa regions. The airway inflammation score of both treatment groups revealed a significant reduction of inflammation and granulocyte infiltration at the peribronchiale and perivascular regions (p < 0.05). Administration of aerosolised MSCs alone was resulted in significant reduction in the levels of pro-inflammatory genes (IL-4 and TGF-β) while treatment with aerosolised MSC-pANGPT1 led to further reduction of various pro-inflammatory genes to the base-line values (IL4, TNF, MMP9 and TGF-β). Treatment with both aerosolised MSCs and MSC-pANGPT1 cells was also alleviated the number of airway inflammatory cells in the bronchoalveolar lavage (BAL) fluid and goblet cell hyperplasia. CONCLUSION(S) Our findings suggest that treatment with MSCs alone attenuated airway inflammation and structural changes of the airway. Treatment with MSC-pANGPT1 provided an additional effect in reducing the expression levels of various pro-inflammatory genes. Both of these treatment enhancing airway repair and therefore may provide a basis for the development of an innovative approach for the treatment and prevention of airway inflammatory diseases.
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Affiliation(s)
- N S S Halim
- Regenerative Medicine Cluster, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, 13200, Bertam, Penang, Malaysia
| | - E S Ch'ng
- Oncological and Radiological Science Cluster, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, 13200, Bertam, Penang, Malaysia
| | - E Kardia
- Regenerative Medicine Cluster, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, 13200, Bertam, Penang, Malaysia
| | - S A Ali
- Oncological and Radiological Science Cluster, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, 13200, Bertam, Penang, Malaysia
| | - R Radzi
- Animal Research Facilities, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, 13200 Bertam, Penang, Malaysia
| | - B H Yahaya
- Regenerative Medicine Cluster, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, 13200, Bertam, Penang, Malaysia.
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Gál Z, Gézsi A, Molnár V, Nagy A, Kiss A, Sultész M, Csoma Z, Tamási L, Gálffy G, Bálint BL, Póliska S, Szalai C. Investigation of the Possible Role of Tie2 Pathway and TEK Gene in Asthma and Allergic Conjunctivitis. Front Genet 2020; 11:128. [PMID: 32180797 PMCID: PMC7057532 DOI: 10.3389/fgene.2020.00128] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 02/03/2020] [Indexed: 12/31/2022] Open
Abstract
Tie2, coded by the TEK gene, is a tyrosine kinase receptor and plays a central role in vascular stability. It was suggested that variations in the TEK gene might influence the susceptibility to asthma and allergic conjunctivitis. The aim of this study was to further investigate these suggestions, involving different populations and to study the Tie2 related pathway on a mouse model of asthma. The discovery, stage I cohort involved 306 patients with moderate and severe allergic rhinitis, the stage II study consisted of four cohorts, namely, adult and pediatric asthmatics and corresponding controls. Altogether, there were 1,258 unrelated individuals in these cohorts, out of which 63.9% were children and 36.1% were adults. In stage I, 112 SNPs were screened in the TEK gene of the patients in order to search for associations with asthma and allergic conjunctivitis. The top associated SNPs were selected for association studies on the replication cohorts. The rs3824410 SNP was nominally associated with a reduced risk of asthma in the stage I cohort and with severe asthma within the asthmatic population (p=0.009; OR=0.48) in the replication cohort. In the stage I study, 5 SNPs were selected in conjunctivitis. Due to the low number of adult patients with conjunctivitis, only children were involved in stage II. Within the asthmatic children, the rs622232 SNP was associated with conjunctivitis in boys in the dominant model (p=0.004; OR=4.76), while the rs7034505 showed association to conjunctivitis in girls (p=0.012; OR=2.42). In the lung of a mouse model of asthma, expression changes of 10 Tie2 pathway-related genes were evaluated at three points in time. Eighty percent of the selected genes showed significant changes in their expressions at least at one time point during the process, leading from sensitization to allergic airway inflammation. The expressions of both the Tek gene and its ligands showed a reduced level at all time points. In conclusion, our results provide additional proof that the Tie2 pathway, the TEK gene and its variations might have a role in asthma and allergic conjunctivitis. The gene and its associated pathways can be potential therapeutic targets in both diseases.
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Affiliation(s)
- Zsófia Gál
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - András Gézsi
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - Viktor Molnár
- Institute of Genomic Medicine and Rare Disorders, Semmelweis University, Budapest, Hungary
| | - Adrienne Nagy
- Department of Allergology, Heim Pál Children's Hospital, Budapest, Hungary
| | - András Kiss
- Department of Urology, Heim Pál Children's Hospital, Budapest, Hungary
| | - Monika Sultész
- Department of Ear, Nose and Throat, Heim Pál Children's Hospital, Budapest, Hungary
| | - Zsuzsanna Csoma
- Outpatient Care for Allergy and Asthma, National Korányi Institute of TB and Pulmonology, Budapest, Hungary
| | - Lilla Tamási
- Department of Pulmonology, Semmelweis University, Budapest, Hungary
| | - Gabriella Gálffy
- Adult Inpatient Care, Pulmonology Hospital Törökbálint, Törökbálint, Hungary
| | - Bálint L Bálint
- Department of Biochemistry & Molecular Biology, Genomic Medicine & Bioinformatic Core Facility, University of Debrecen, Debrecen, Hungary
| | - Szilárd Póliska
- Department of Biochemistry & Molecular Biology, Genomic Medicine & Bioinformatic Core Facility, University of Debrecen, Debrecen, Hungary
| | - Csaba Szalai
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary.,Department of Research and Development, Heim Pál Children's Hospital, Budapest, Hungary
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Glynos C, Bibli SI, Katsaounou P, Pavlidou A, Magkou C, Karavana V, Topouzis S, Kalomenidis I, Zakynthinos S, Papapetropoulos A. Comparison of the effects of e-cigarette vapor with cigarette smoke on lung function and inflammation in mice. Am J Physiol Lung Cell Mol Physiol 2018; 315:L662-L672. [PMID: 30091379 DOI: 10.1152/ajplung.00389.2017] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Electronic cigarettes (e-cigs) are advertised as a less harmful nicotine delivery system or as a new smoking cessation tool. We aimed to assess the in vivo effects of e-cig vapor in the lung and to compare them to those of cigarette smoke (CS). We exposed C57BL/6 mice for either 3 days or 4 wk to ambient air, CS, or e-cig vapor containing 1) propylene glycol/vegetable glycerol (PG:VG-Sol; 1:1), 2) PG:VG with nicotine (G:VG-N), or 3) PG:VG with nicotine and flavor (PG:VG-N+F) and determined oxidative stress, inflammation, and pulmonary mechanics. E-cig vapors, especially PG:VG-N+F, increased bronchoalveolar lavage fluid (BALF) cellularity, Muc5ac production, as well as BALF and lung oxidative stress markers at least comparably and in many cases more than CS. BALF protein content at both time points studied was only elevated in the PG:VG-N+F group. After 3 days, PG:VG-Sol altered tissue elasticity, static compliance, and airway resistance, whereas after 4 wk CS was the only treatment adversely affecting these parameters. Airway hyperresponsiveness in response to methacholine was increased similarly in the CS and PG:VG-N+F groups. Our findings suggest that exposure to e-cig vapor can trigger inflammatory responses and adversely affect respiratory system mechanics. In many cases, the added flavor in e-cigs exacerbated the detrimental effects of e-cig vapor. We conclude that both e-cig vaping and conventional cigarette smoking negatively impact lung biology.
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Affiliation(s)
- Constantinos Glynos
- George P. Livanos and Marianthi Simou Laboratories, Evangelismos Hospital, 1st Department of Pulmonary and Critical Care, National and Kapodistrian University of Athens Medical School , Greece
| | - Sofia-Iris Bibli
- Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens , Athens , Greece.,Institute for Vascular Signaling, Centre for Molecular Medicine, Goethe University , Frankfurt am Main , Germany
| | - Paraskevi Katsaounou
- George P. Livanos and Marianthi Simou Laboratories, Evangelismos Hospital, 1st Department of Pulmonary and Critical Care, National and Kapodistrian University of Athens Medical School , Greece
| | - Athanasia Pavlidou
- George P. Livanos and Marianthi Simou Laboratories, Evangelismos Hospital, 1st Department of Pulmonary and Critical Care, National and Kapodistrian University of Athens Medical School , Greece.,Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens , Athens , Greece
| | - Christina Magkou
- Department of Histopathology, Evangelismos Hospital , Athens , Greece
| | - Vassiliki Karavana
- George P. Livanos and Marianthi Simou Laboratories, Evangelismos Hospital, 1st Department of Pulmonary and Critical Care, National and Kapodistrian University of Athens Medical School , Greece
| | - Stavros Topouzis
- Laboratory of Molecular Pharmacology, Department of Pharmacy, University of Patras , Patras , Greece
| | - Ioannis Kalomenidis
- George P. Livanos and Marianthi Simou Laboratories, Evangelismos Hospital, 1st Department of Pulmonary and Critical Care, National and Kapodistrian University of Athens Medical School , Greece
| | - Spyros Zakynthinos
- George P. Livanos and Marianthi Simou Laboratories, Evangelismos Hospital, 1st Department of Pulmonary and Critical Care, National and Kapodistrian University of Athens Medical School , Greece
| | - Andreas Papapetropoulos
- George P. Livanos and Marianthi Simou Laboratories, Evangelismos Hospital, 1st Department of Pulmonary and Critical Care, National and Kapodistrian University of Athens Medical School , Greece.,Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens , Athens , Greece
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Fodor LE, Gézsi A, Gál Z, Nagy A, Kiss A, Bikov A, Szalai C. Variation in the TEK gene is not associated with asthma but with allergic conjunctivitis. Int J Immunogenet 2018; 45:102-108. [PMID: 29667338 DOI: 10.1111/iji.12365] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 01/22/2018] [Accepted: 03/22/2018] [Indexed: 11/29/2022]
Abstract
The Tie2 receptor is an important player in angiogenesis. The Tie2 mRNA and protein are abundantly expressed in the lungs and the associated pathway also has an important role in the development and function of the eye. Tie2 is encoded by the TEK gene in humans. Recently, variations in the TEK gene have been found associated with asthma. The objective of the present study was to investigate whether variations in the TEK gene influenced the susceptibility to pediatric asthma and/or associated phenotypes like GINA status, viral- or exercise-induced asthma, allergic asthma, indoor, outdoor, inhalative allergies, IgE and eosonophil levels, allergic rhinitis and allergic conjunctivitis. Three single nucleotide polymorphisms (SNPs, rs3780315, rs581724 and rs7876024) in the TEK gene were genotyped in 1189 unrelated individuals, out of which 435 were asthmatic children and 754 healthy controls. Different types of asthma, allergies and co-morbidities were defined in 320 patients. Among the fully phenotyped 320 asthmatic patients 178 (55.6%) also had allergic rhinitis and 100 (31.3%) had conjunctivitis. Among the rhinitis patients 98 (55.1%) also had conjunctivitis. Two patients had conjunctivitis without rhinitis. The genotyped SNPs showed no association with asthma. However, SNP rs581724 was significantly associated with allergic conjunctivitis in a recessive way (p=0.007; OR=2.3 (1.3-4.4)) within the asthmatic population. The risk remained significant when the whole population (asthmatics and healthy controls) was included in the calculation (p = 0.003; OR = 2.1 (1.3-3.6)). The minor allele of the rs581724 SNP which is associated with the increased risk to conjunctivitis is also associated with reduced Tie2 expression. There was a significant association between SNP rs581724 and the occurrence of allergic conjunctivitis in asthmatic children. If additional studies can confirm the role of the Tie2 pathway in allergic conjunctivitis, it can be a potential novel therapeutic target in the disease.
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Affiliation(s)
- L E Fodor
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - A Gézsi
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - Z Gál
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - A Nagy
- Heim Pal Children Hospital, Budapest, Hungary
| | - A Kiss
- Heim Pal Children Hospital, Budapest, Hungary
| | - A Bikov
- Department of Pulmonology, Semmelweis University, Budapest, Hungary
| | - C Szalai
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary.,Heim Pal Children Hospital, Budapest, Hungary
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Koksal B, Ozbek OY. Angiopoietin 1 and 2 levels in inhaled steroid using children with stable asthma. Ann Allergy Asthma Immunol 2017; 117:448. [PMID: 27742088 DOI: 10.1016/j.anai.2016.07.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 07/21/2016] [Indexed: 10/20/2022]
Affiliation(s)
- Burcu Koksal
- Pediatric Allergy Department, Baskent University, Ankara, Turkey.
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Makowska JS, Cieślak M, Jarzębska M, Lewandowska-Polak A, Kowalski ML. Angiopoietin-2 concentration in serum is associated with severe asthma phenotype. Allergy Asthma Clin Immunol 2016; 12:8. [PMID: 26937244 PMCID: PMC4774021 DOI: 10.1186/s13223-016-0112-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 01/06/2016] [Indexed: 11/15/2022] Open
Abstract
Background Several proangiogenic molecules have been implicated in the pathogenies of asthmatic inflammation and remodeling. The aim of the study was to compare the concentration of proangiogenic factors in the sera of asthmatic patients and in healthy subjects (HS), and to refer the concentrations to both clinical and inflammatory markers of the disease severity. Methods Serum was collected from 45 patients with severe/refractory asthma (SRA) and 51 patients with non-severe asthma (nSA). The control group included 30 HS. Serum concentrations of Angiopoietin-1, Angiopoietin-2, vascular endothelial growth factor (VEGF) and osteopontin were assessed by the enzyme-linked immunosorbent assay. Results The levels of Angiopoietin-1 (68.8 ± 2.7 vs 56.4 ± 9.3 ng/ml; p < 0.05), Angiopoietin-2 (4.9 ± 0.35 vs 1.38 ± 0.14 ng/ml; p < 0.0001) and VEGF were significantly higher in asthmatic patients (n = 94) as compared to HS (255 ± 45.4 vs 424.5 ± 27.8 pg/ml; p < 0.01). The mean serum level of Angiopoietin-2 was found to be significantly higher in patients with SRA as compared to nSA patients (6.04 ± 0.46 vs 3.84 ± 0.43; p < 0.001). Angiopoietin-2 serum level correlated with respiratory function and with parameters of asthma severity: the mean number of asthma exacerbations in the preceding 12 months (R = 0.21; p < 0.05), mean number of emergency visits due to severe asthma exacerbation (R = 0.24; p < 0.04) and mean number of hospitalizations (R = 0.21; p < 0.05) or dose of inhaled glucocorticosteroids taken by the patients (R = 0.36; p < 0.001). Conclusion Angiopoietin-2 seems to be a crucial proangiogenic cytokine overproduced in patients with SRA characterized by repeated exacerbations and Angiopoietin-2 serum levels can serve as a biomarker of severe asthma.
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Affiliation(s)
- Joanna S Makowska
- Department of Rheumatology, Chair of Clinical Immunology and Microbiology, Healthy Aging Research Center, Medical University of Lodz, 251 Pomorska Str, 92-213 Lodz, Poland
| | - Małgorzata Cieślak
- Department of Immunology, Rheumatology and Allergy, Medical University of Lodz, Lodz, Poland
| | - Marzanna Jarzębska
- Department of Immunology, Rheumatology and Allergy, Medical University of Lodz, Lodz, Poland
| | - Anna Lewandowska-Polak
- Department of Immunology, Rheumatology and Allergy, Chair of Clinical Immunology and Microbiology, Healthy Aging Research Center, Medical University of Lodz, Lodz, Poland
| | - Marek L Kowalski
- Department of Immunology, Rheumatology and Allergy, Chair of Clinical Immunology and Microbiology, Healthy Aging Research Center, Medical University of Lodz, Lodz, Poland
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Lee PH, Kim BG, Seo HJ, Park JS, Lee JH, Park SW, Kim DJ, Park HS, Park CS, Jang AS. Circulating angiopoietin-1 and -2 in patients with stable and exacerbated asthma. Ann Allergy Asthma Immunol 2016; 116:339-43. [PMID: 26776887 DOI: 10.1016/j.anai.2015.12.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/11/2015] [Accepted: 12/02/2015] [Indexed: 12/25/2022]
Abstract
BACKGROUND Angiopoietin (Ang)-1 and -2 are involved in the pathogenesis of asthma and have been identified as markers of asthma severity. OBJECTIVE To determine the relation between circulating angiopoietins and clinical variables of patients with asthma. METHODS Fifty patients with bronchial asthma and 25 healthy controls were enrolled. Ang1 and Ang2 plasma levels were analyzed in patients with stable and exacerbated asthma. RESULTS Plasma Ang1 levels were 28.4 ± 4.01 pg/mg in patients with bronchial asthma and 21.2 ± 5.21 pg/mg in healthy controls. Plasma Ang2 levels were 23.96 ± 1.38 pg/mg in patients with bronchial asthma compared with 36.8 ± 4.46 pg/mg in healthy controls (P = .010). The ratio of Ang2 to Ang1 was lower in patients with asthma than in control subjects. Plasma Ang1 concentrations were correlated with the ratio of forced expiratory volume in 1 second (FEV1) to forced vital capacity (FVC), and plasma Ang2 levels were correlated with FEV1 percentage of predicted, FEV1/FVC, and total immunoglobulin E values. The ratio of Ang2 to Ang1 was correlated with FEV1 percentage of predicted and FEV1/FVC. Although plasma Ang1 levels tended to be lower in the exacerbated state than in the stable state in patients with asthma, Ang2 levels were higher in the exacerbated state than in the stable state in patients with asthma (P = .001). Plasma Ang2 levels were correlated with initial eosinophil proportions and initial neutrophil proportions. Plasma Ang2 levels and the ratio of Ang2 to Ang1 were correlated with blood eosinophil proportions in the exacerbated state. CONCLUSION These results indicate that circulating angiopoietins could be a useful marker of asthma exacerbation.
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Affiliation(s)
- Pureun-Haneul Lee
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Byeong-Gon Kim
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Hyun-Jeong Seo
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Jong-Sook Park
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - June-Hyuck Lee
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Sung-Woo Park
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Do-Jin Kim
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Hae-Sim Park
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Choon-Sik Park
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - An-Soo Jang
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea.
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Hantera M, Abd El-Hafiz H, Abdelnaby AY. Serum levels of angiopoietin-2 and vascular endothelial growth factor in severe refractory asthma. EGYPTIAN JOURNAL OF CHEST DISEASES AND TUBERCULOSIS 2014. [DOI: 10.1016/j.ejcdt.2014.05.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Moon KY, Lee PH, Park SW, Park CS, Jang AS. Serum angiopoietin is associated with lung function in patients with asthma: a retrospective cohort study. BMC Pulm Med 2014; 14:143. [PMID: 25178399 PMCID: PMC4236734 DOI: 10.1186/1471-2466-14-143] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Accepted: 08/18/2014] [Indexed: 01/21/2023] Open
Abstract
Background Angiopoietin-1 (Ang-1) is an essential mediator of angiogenesis that establishes vascular integrity, and angiopoietin-2 (Ang-2) acts as its natural inhibitor. We considered that angiopoietin might be important in bronchial asthma. Methods In total, 35 patients with asthma and 20 healthy subjects were studied. Results The serum Ang-1 levels were significantly elevated in patients with asthma compared to control subjects (293.9 ± 13.8 pg/mL vs. 248.3 ± 16.2 pg/mL, respectively, p = 0.04). The serum Ang-2 levels were not different between the two groups. The areas under the curve (AUC) for serum angiopoietins revealed that the serum level of Ang-1 (0.68) was more sensitive and specific than the serum Ang-2 level (0.55) for differentiating between patients with asthma and control subjects. The serum Ang-1/Ang-2 ratio was correlated with the FEV1/FVC ratio (r = -0.312, p = 0.02), while serum Ang-2 was correlated with body mass index. Conclusions Our results indicate that the serum Ang-1 levels were higher in asthma patients compared with healthy subjects. As the Ang-1/Ang-2 ratio was related to lung function, the data suggest that serum angiopoietin is associated with lung function in patients with asthma.
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Affiliation(s)
| | | | | | | | - An-Soo Jang
- Genome Research Center for Allergy and Respiratory Diseases, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro, Wonmi-gu, Bucheon, Gyeonggi-do 420-767, Republic of Korea.
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12
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Rowley JE, Johnson JR. Pericytes in chronic lung disease. Int Arch Allergy Immunol 2014; 164:178-88. [PMID: 25034005 DOI: 10.1159/000365051] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Pericytes are mesenchymal cells embedded within the abluminal surface of the endothelium of microvessels such as capillaries, pre-capillary arterioles, post-capillary and collecting venules, where they maintain microvascular homeostasis and participate in angiogenesis. In addition to their roles in supporting the vasculature and facilitating leukocyte extravasation, pericytes have been recently investigated as a subpopulation of mesenchymal stem cells (MSCs) due to their capacity to differentiate into numerous cell types including the classic MSC triad, i.e. osteocytes, chondrocytes and adipocytes. Other studies in models of fibrotic inflammatory disease of the lung have demonstrated a vital role of pericytes in myofibroblast activation, collagen deposition and microvascular remodelling, which are hallmark features of chronic lung diseases such as asthma, chronic obstructive pulmonary disorder, pulmonary fibrosis and pulmonary hypertension. Further studies into the mechanisms of the pericyte-to-myofibroblast transition and migration to fibrotic foci will hopefully clarify the role of these cells in chronic lung disease and confirm the importance of pericytes in human fibrotic pulmonary disease.
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Affiliation(s)
- Jessica E Rowley
- Leukocyte Biology Section, National Heart and Lung Institute, Imperial College London, London, UK
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13
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Linares PM, Chaparro M, Gisbert JP. Angiopoietins in inflammation and their implication in the development of inflammatory bowel disease. A review. J Crohns Colitis 2014; 8:183-90. [PMID: 23859759 DOI: 10.1016/j.crohns.2013.06.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Accepted: 06/19/2013] [Indexed: 02/08/2023]
Abstract
BACKGROUND Angiopoietins are essential angiogenic mediators. Since inflammatory bowel disease (IBD) involves inflammation, ulceration and regeneration of the intestinal mucosa, the angiopoietin system has been proposed as a factor to maintain pathological angiogenesis during the development of the IBD. AIM To review the potential role of angiopoietins in the inflammation driven by angiogenesis during the course of the IBD. METHODS Publications were identified by PubMed searches using the following key words: angiopoietin; Tie-2 receptor; angiogenesis; inflammatory bowel disease and inflammation, in various combinations. RESULTS Angiopoietin-1 acts as a regulator of blood vessel maturation and has anti-inflammatory properties, whereas angiopoietin-2 marks the onset of angiogenesis and is required for normal formation of lymph vessels. Both angiopoietins make use of their angiogenic regulatory effects via the angiopoietin tyrosine-kinase receptor (Tie-2). While angiogenesis has been shown to promote and sustain many events of inflammation, the involvement of the angiopoietin system in IBD has been reported in few studies. It is not clear whether the angiopoietins' role in the development of intestinal inflammation is due to an imbalance in the levels of these proteins or this system exerts its pro-angiogenic properties through a different mechanism during the close-loop relationship between angiogenesis and inflammation. CONCLUSIONS Angiopoietins have key functions in the angiogenic process, and their abnormal activation might depend on their surrounding inflamed environment. The determination of these angiogenic factors in serum and tissue could be useful for monitoring IBD progression.
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Affiliation(s)
- Pablo M Linares
- Gastroenterology Unit, Hospital Universitario de La Princesa and Instituto de Investigación Sanitaria Princesa (IP), Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Spain.
| | - María Chaparro
- Gastroenterology Unit, Hospital Universitario de La Princesa and Instituto de Investigación Sanitaria Princesa (IP), Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Spain
| | - Javier P Gisbert
- Gastroenterology Unit, Hospital Universitario de La Princesa and Instituto de Investigación Sanitaria Princesa (IP), Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Spain
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14
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Yao JH, Cui M, Li MT, Liu YN, He QH, Xiao JJ, Bai Y. Angiopoietin1 inhibits mast cell activation and protects against anaphylaxis. PLoS One 2014; 9:e89148. [PMID: 24586553 PMCID: PMC3929638 DOI: 10.1371/journal.pone.0089148] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 01/14/2014] [Indexed: 01/13/2023] Open
Abstract
Since morbidity and mortality rates of anaphylaxis diseases have been increasing year by year, how to prevent and manage these diseases effectively has become an important issue. Mast cells play a central regulatory role in allergic diseases. Angiopoietin1 (Ang-1) exhibits anti-inflammatory properties by inhibiting vascular permeability, leukocyte migration and cytokine production. However, Ang-1's function in mast cell activation and anaphylaxis diseases is unknown. The results of our study suggest that Ang-1 decreased lipopolysaccharide (LPS)-induced pro-inflammatory cytokines production of mast cells by suppressing IκB phosphorylation and NF-κB nuclear translocation. Ang-1 also strongly inhibited compound 48/80 induced and FcεRI-mediated mast cells degranulation by decreasing intracellular calcium levels in vitro. In vivo lentivirus-mediated delivery of Ang-1 in mice exhibited alleviated leakage in IgE-dependent passive cutaneous anaphylaxis (PCA). Furthermore, exogenous Ang-1 intervention treatment prevented mice from compound 48/80-induced mesentery mast cell degranulation, attenuated increases in pro-inflammatory cytokines, relieved lung injury, and improved survival in anaphylaxis shock. The results of our study reveal, for the first time, the important role of Ang-1 in the activation of mast cells, and identify a therapeutic effect of Ang-1 on anaphylaxis diseases.
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Affiliation(s)
- Jun-Hua Yao
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Ming Cui
- Department of Cardiology, Peking University Third Hospital, Beijing, China
| | - Meng-Tao Li
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Yi-Nan Liu
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Qi-Hua He
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Jun-Jun Xiao
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Yun Bai
- Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
- * E-mail:
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15
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The angiopoietin:Tie 2 interaction: a potential target for future therapies in human vascular disease. Cytokine Growth Factor Rev 2013; 24:579-92. [PMID: 23838360 DOI: 10.1016/j.cytogfr.2013.05.009] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2013] [Revised: 05/22/2013] [Accepted: 05/24/2013] [Indexed: 01/06/2023]
Abstract
Angiopoietin-1 and -2 are endogenous ligands for the vascular endothelial receptor tyrosine kinase Tie2. Signalling by angiopoietin-1 promotes vascular endothelial cell survival and the sprouting and reorganisation of blood vessels, as well as inhibiting activation of the vascular endothelial barrier to reduce leakage and leucocyte migration into tissues. Angiopoietin-2 generally has an opposing action, and is released naturally at times of vascular growth and inflammation. There is a significant body of emerging evidence that promoting the actions of angiopoietin-1 through Tie2 is of benefit in pathologies of vascular activation, such as sepsis, stroke, diabetic retinopathy and asthma. Similarly, methods to inhibit the actions of angiopoietin-2 are emerging and have been demonstrated to be of preclinical and clinical benefit in reducing tumour angiogenesis. Here the author reviews the evidence for potential benefits of modulation of the interaction of angiopoietins with Tie2, and the potential applications. Additionally, methods for delivery of the complex protein angiopoietin-1 are discussed, as well as potentially deleterious consequences of administering angiopoietin-1.
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16
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Choi JS, Kwak KA, Park MJ, Kim YH, Gil HW, Song HY, Hong SY. Ratio of angiopoietin-2 to angiopoietin-1 predicts mortality in acute lung injury induced by paraquat. Med Sci Monit 2013; 19:28-33. [PMID: 23302768 PMCID: PMC3628933 DOI: 10.12659/msm.883730] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Background To determine whether initial reactive oxygen species (ROS)-induced endothelial cell injury is involved in early death after paraquat intoxication and concentrations of angiopoietin-1 (Ang-1), angiopoietin-2 (Ang-2), and von Willebrand factor (VWF) reflecting endothelial cell injury, we investigated the initial endothelial cell injury marker involved in the pathogenesis of death within 5 days after paraquat ingestion. Material/Methods Sixty patients with paraquat poisoning were prospectively enrolled. Plasma samples were collected at admission. Plasma concentrations of Ang-1, Ang-2, and VWF were measured by enzyme-linked immunosorbent assay. The patients were classified into 3 categories: survivors, early death (died within 5 days after ingestion), and late death (died more than 5 days after ingestion). Results The baseline concentration of Ang-2 and the Ang-2: Ang-1 ratio were significantly higher in patients who died (Ang-2 [pg/mL], 1012.75±468.02 vs. 1986.07±1675.37 [p=0.002]; Ang-2: Ang-1, 0.90±0.49 vs. 2.16±2.28 [p=0.002]). The Ang-2: Ang-1 ratio was significantly higher in the early death group (2.41±2.54) than in the survivors (0.90±0.49) and the late death group (1.33±0.64). The Ang-2: Ang-1 ratio was significantly associated with early death (OR, 2.602; 95% CI, 1.106–6.117; p=0.028) after adjusting for plasma levels of paraquat, age, PCO2, and creatinine. VWF did not predict mortality. Conclusions Endothelial cell damage could be involved in the pathogenesis of early death following paraquat ingestion.
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Affiliation(s)
- Jae-Sung Choi
- Department of Internal Medicine, Soonchunhyang University Cheonan Hospital, Cheonan, Korea
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17
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Simoes DCM, Psarra AMG, Mauad T, Pantou I, Roussos C, Sekeris CE, Gratziou C. Glucocorticoid and estrogen receptors are reduced in mitochondria of lung epithelial cells in asthma. PLoS One 2012; 7:e39183. [PMID: 22761735 PMCID: PMC3384641 DOI: 10.1371/journal.pone.0039183] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Accepted: 05/21/2012] [Indexed: 01/21/2023] Open
Abstract
Mitochondrial glucocorticoid (mtGR) and estrogen (mtER) receptors participate in the coordination of the cell's energy requirement and in the mitochondrial oxidative phosphorylation enzyme (OXPHOS) biosynthesis, affecting reactive oxygen species (ROS) generation and induction of apoptosis. Although activation of mtGR and mtER is known to trigger anti-inflammatory signals, little information exists on the presence of these receptors in lung tissue and their role in respiratory physiology and disease. Using a mouse model of allergic airway inflammation disease and applying confocal microscopy, subcellular fractionation, and Western blot analysis we showed mitochondrial localization of GRα and ERβ in lung tissue. Allergic airway inflammation caused reduction in mtGRα, mtERβ, and OXPHOS enzyme biosynthesis in lung cells mitochondria and particularly in bronchial epithelial cells mitochondria, which was accompanied by decrease in lung mitochondrial mass and induction of apoptosis. Confirmation and validation of the reduction of the mitochondrial receptors in lung epithelial cells in human asthma was achieved by analyzing autopsies from fatal asthma cases. The presence of the mitochondrial GRα and ERβ in lung tissue cells and especially their reduction in bronchial epithelial cells during allergic airway inflammation suggests a crucial role of these receptors in the regulation of mitochondrial function in asthma, implicating their involvement in the pathophysiology of the disease.
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Affiliation(s)
- Davina C. M. Simoes
- “G.P. Livanos and M. Simou” Laboratories, Evangelismos Hospital, Department of Critical Care and Pulmonary Services, University of Athens Medical School, Athens, Greece
| | - Anna-Maria G. Psarra
- University of Thessaly, Department of Biochemistry and Biotechnology, Larissa, Greece
- Biomedical Research Foundation of the Academy of Athens, Center for Basic Research, Laboratory of Biochemistry, Athens, Greece
| | - Thais Mauad
- Department of Pathology, Sao Paulo University Medical School, Sao Paulo, Brazil
| | - Ioanna Pantou
- “G.P. Livanos and M. Simou” Laboratories, Evangelismos Hospital, Department of Critical Care and Pulmonary Services, University of Athens Medical School, Athens, Greece
| | - Charis Roussos
- “G.P. Livanos and M. Simou” Laboratories, Evangelismos Hospital, Department of Critical Care and Pulmonary Services, University of Athens Medical School, Athens, Greece
| | - Constantine E. Sekeris
- National Hellenic Research Foundation, Institute of Biological Research and Biotechnology, Laboratory of Molecular Endocrinology, Athens, Greece
| | - Christina Gratziou
- “G.P. Livanos and M. Simou” Laboratories, Evangelismos Hospital, Department of Critical Care and Pulmonary Services, University of Athens Medical School, Athens, Greece
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18
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Jung YJ, Choi HJ, Lee JE, Lee AS, Kang KP, Lee S, Park SK, Park TS, Jin HY, Lee SY, Kim DH, Kim W. The effects of designed angiopoietin-1 variant on lipid droplet diameter, vascular endothelial cell density and metabolic parameters in diabetic db/db mice. Biochem Biophys Res Commun 2012; 420:498-504. [PMID: 22430141 DOI: 10.1016/j.bbrc.2012.03.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Accepted: 03/03/2012] [Indexed: 11/25/2022]
Abstract
Metabolic syndrome consists of metabolic abnormality with central obesity, hypertriglyceridemia, insulin resistance and hypertension. Adipose tissue has been known as a primary site of insulin resistance and its adipocyte size may be correlated with the degree of insulin resistance. A designed angiopoietin-1, COMP-Angiopoietin-1 (COMP-Ang1), mitigated high-fat diet-induced insulin resistance in skeletal muscle. In this study, we examined effects of COMP-Ang1 on adipocyte droplet size, vascular endothelial cell density in adipose tissue and metabolic parameters in db/db mice by administering COMP-Ang1 or LacZ (as a control) adenovirus. Administration of COMP-Ang1 decreased fat droplet diameter in epididymal and abdominal visceral adipocyte and visceral fat content in db/db mice. The density of vascular endothelial cell in adipose tissue was increased in db/db mice after treatment with COMP-Ang1. Serum resistin and tumor necrosis factor-α level was lower after treatment with COMP-Ang1 in db/db mice. COMP-Ang1 caused a restoration of fasting glycemic control in db/db mice and decreased serum insulin level and insulin resistance measured by HOMA index. These findings indicate that COMP-Ang1 regulates adipocyte fat droplet diameter, vascular endothelial cell density and metabolic parameters in db/db mice.
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Affiliation(s)
- Yu Jin Jung
- Department of Internal Medicine, Chonbuk National University Medical School, Jeonju, Republic of Korea
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Tseliou E, Bakakos P, Kostikas K, Hillas G, Mantzouranis K, Emmanouil P, Simoes D, Alchanatis M, Papiris S, Loukides S. Increased levels of angiopoietins 1 and 2 in sputum supernatant in severe refractory asthma. Allergy 2012; 67:396-402. [PMID: 22229541 DOI: 10.1111/j.1398-9995.2011.02768.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/17/2011] [Indexed: 12/30/2022]
Abstract
BACKGROUND Airway and vascular remodeling may play a prominent role in the clinical severity of severe refractory asthma (SRA). Angiopoietin-1 (Ang-1) is an essential mediator of angiogenesis by establishing vascular integrity, whereas angiopoietin-2 (Ang-2) acts as its natural inhibitor. OBJECTIVE We aimed to determine the levels of angiopoietins in sputum supernatants of patients with SRA and to investigate the possible associations with mediators and cells involved in both the inflammatory and the vascular remodeling processes. METHODS Thirty-eight patients with SRA, 35 patients with moderate asthma, and 20 healthy subjects were studied. All participants underwent lung function tests, bronchial hyperresponsiveness assessment and sputum induction for cell count identification and Ang-1, Ang-2, VEGF, TGF-β1, Cys-LTs, MMP-2, IL-13, ECP, and IL-8 measurement in supernatants. Airway vascular permeability (AVP) index was also assessed. RESULTS Ang-1 (ng/ml) and Ang-2 (pg/ml) levels were significantly elevated in patients with SRA compared with patients with moderate asthma and control subjects [median, interquartile ranges: 30 (17-39) vs 7.5 (5-11) vs 4.7 (3.8-5.9) respectively, P < 0.001; and 506 (400-700) vs 190 (146-236) vs 96 (89-120) respectively, P < 0.001]. Regression analysis showed a significant positive association between Ang-2 and AVP index, MMP-2, Ang-1, and VEGF in SRA. A weak association was also observed between Ang-1 and sputum eosinophils% in SRA. CONCLUSION Our results indicate that both angiopoietins levels are higher in SRA compared with moderate asthma and healthy subjects. In SRA, Ang-2 is associated with mediators involved in both the inflammatory and the vascular remodeling processes.
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Affiliation(s)
- E. Tseliou
- 2nd Respiratory Medicine Department; University of Athens Medical School; ‘Attikon’ Hospital; Athens; Greece
| | - P. Bakakos
- 1st Respiratory Medicine Department; University of Athens Medical School; ‘Sotiria’ Chest Hospital; Athens; Greece
| | - K. Kostikas
- 2nd Respiratory Medicine Department; University of Athens Medical School; ‘Attikon’ Hospital; Athens; Greece
| | - G. Hillas
- Research Unit; Department of Respiratory and Critical Care Medicine; ‘Sotiria’ Chest Hospital; Athens; Greece
| | - K. Mantzouranis
- 1st Respiratory Medicine Department; University of Athens Medical School; ‘Sotiria’ Chest Hospital; Athens; Greece
| | - P. Emmanouil
- 1st Respiratory Medicine Department; University of Athens Medical School; ‘Sotiria’ Chest Hospital; Athens; Greece
| | - D. Simoes
- G.P Livanos and M. Simou Laboratories; Department of Critical Care and Pulmonary Services; ‘Evangelismos’ Hospital; University of Athens; Medical School; Athens; Greece
| | - M. Alchanatis
- 1st Respiratory Medicine Department; University of Athens Medical School; ‘Sotiria’ Chest Hospital; Athens; Greece
| | - S. Papiris
- 2nd Respiratory Medicine Department; University of Athens Medical School; ‘Attikon’ Hospital; Athens; Greece
| | - S. Loukides
- 2nd Respiratory Medicine Department; University of Athens Medical School; ‘Attikon’ Hospital; Athens; Greece
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20
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Near fatal asthma: clinical and airway biopsy characteristics. Pulm Med 2012; 2012:829608. [PMID: 22448330 PMCID: PMC3289876 DOI: 10.1155/2012/829608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2011] [Revised: 10/18/2011] [Accepted: 11/07/2011] [Indexed: 11/26/2022] Open
Abstract
Background. Inflammation and remodeling are integral parts of asthma pathophysiology. We sought to describe the clinical and pathologic features of near fatal asthma exacerbation (NFE). Methods. Bronchial biopsies were collected prospectively from NFE I subjects. Another NFE II group and a moderate severity exacerbation control group (ME II) were retrospectively identified—no biopsies obtained. Results. All NFE II (n = 9) subjects exhibited remodeling and significant inflammation (eosinophilic, neutrophilic). NFE II group (n = 37) had a significant history of prior intubation and inhaled corticosteroids usage compared to ME II group (n = 41). They also exhibited leukocytosis, eosinophilia, and longer hospitalization days. Conclusions. Remodeling, eosinophilic, and neutrophilic inflammation were observed in NFE. NFE is associated with prior intubation and inhaled corticosteroids usage.
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21
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Manali ED, Moschos C, Triantafillidou C, Kotanidou A, Psallidas I, Karabela SP, Roussos C, Papiris S, Armaganidis A, Stathopoulos GT, Maniatis NA. Static and dynamic mechanics of the murine lung after intratracheal bleomycin. BMC Pulm Med 2011; 11:33. [PMID: 21627835 PMCID: PMC3128859 DOI: 10.1186/1471-2466-11-33] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Accepted: 05/31/2011] [Indexed: 01/14/2023] Open
Abstract
Background Despite its widespread use in pulmonary fibrosis research, the bleomycin mouse model has not been thoroughly validated from a pulmonary functional standpoint using new technologies. Purpose of this study was to systematically assess the functional alterations induced in murine lungs by fibrogenic agent bleomycin and to compare the forced oscillation technique with quasi-static pressure-volume curves in mice following bleomycin exposure. Methods Single intratracheal injections of saline (50 μL) or bleomycin (2 mg/Kg in 50 μL saline) were administered to C57BL/6 (n = 40) and Balb/c (n = 32) mice. Injury/fibrosis score, tissue volume density (TVD), collagen content, airway resistance (RN), tissue damping (G) and elastance coefficient (H), hysteresivity (η), and area of pressure-volume curve (PV-A) were determined after 7 and 21 days (inflammation and fibrosis stage, respectively). Statistical hypothesis testing was performed using one-way ANOVA with LSD post hoc tests. Results Both C57BL/6 and Balb/c mice developed weight loss and lung inflammation after bleomycin. However, only C57BL/6 mice displayed cachexia and fibrosis, evidenced by increased fibrosis score, TVD, and collagen. At day 7, PV-A increased significantly and G and H non-significantly in bleomycin-exposed C57BL/6 mice compared to saline controls and further increase in all parameters was documented at day 21. G and H, but not PV-A, correlated well with the presence of fibrosis based on histology, TVD and collagen. In Balb/c mice, no change in collagen content, histology score, TVD, H and G was noted following bleomycin exposure, yet PV-A increased significantly compared to saline controls. Conclusions Lung dysfunction in the bleomycin model is more pronounced during the fibrosis stage rather than the inflammation stage. Forced oscillation mechanics are accurate indicators of experimental bleomycin-induced lung fibrosis. Quasi-static PV-curves may be more sensitive than forced oscillations at detecting inflammation and fibrosis.
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Affiliation(s)
- Effrosyni D Manali
- 2nd Pulmonary Department, Attikon General Hospital, National and Kapodistrian University of Athens Medical School, Haidari, Greece
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David S, Ghosh CC, Kümpers P, Shushakova N, Van Slyke P, Khankin EV, Karumanchi SA, Dumont D, Parikh SM. Effects of a synthetic PEG-ylated Tie-2 agonist peptide on endotoxemic lung injury and mortality. Am J Physiol Lung Cell Mol Physiol 2011; 300:L851-62. [PMID: 21421750 DOI: 10.1152/ajplung.00459.2010] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
A synthetic 7-mer, HHHRHSF, was recently identified by screening a phage display library for binding to the Tie-2 receptor. A polyethylene-oxide clustered version of this peptide, termed vasculotide (VT), was reported to activate Tie-2 and promote angiogenesis in a mouse model of diabetic ulcer. We hypothesized that VT administration would defend endothelial barrier function against sepsis-associated mediators of permeability, prevent lung vascular leakage arising in endotoxemia, and improve mortality in endotoxemic mice. In confluent human microvascular endothelial cells, VT prevented endotoxin-induced (lipopolysaccharides, LPS O111:B4) gap formation, loss of monolayer resistance, and translocation of labeled albumin. In 8-wk-old male C57Bl6/J mice given a ∼70% lethal dose of endotoxin (15 mg/kg ip), VT prevented lung vascular leakage and reversed the attenuation of lung vascular endothelial cadherin induced by endotoxemia. These protective effects of VT were associated with activation of Tie-2 and its downstream mediator, Akt. Echocardiographic studies showed only a nonsignificant trend toward improved myocardial performance associated with VT. Finally, we evaluated survival in this mouse model. Pretreatment with VT improved survival by 41.4% (n = 15/group, P = 0.02) and post-LPS administration of VT improved survival by 33.3% (n = 15/group, P = 0.051). VT-mediated protection from LPS lethality was lost in Tie-2 heterozygous mice, in agreement with VT's proposed receptor specificity. We conclude that this synthetic Tie-2 agonist, completely unrelated to endogenous Tie-2 ligands, is sufficient to activate the receptor and its downstream pathways in vivo and that the Tie-2 receptor may be an important target for therapeutic evaluation in conditions of pathological vascular leakage.
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Affiliation(s)
- Sascha David
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
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23
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Angiopoietin-1 treatment reduces inflammation but does not prevent ventilator-induced lung injury. PLoS One 2010; 5:e15653. [PMID: 21179479 PMCID: PMC3001877 DOI: 10.1371/journal.pone.0015653] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Accepted: 11/14/2010] [Indexed: 01/28/2023] Open
Abstract
Background Loss of integrity of the epithelial and endothelial barriers is thought to be a prominent feature of ventilator-induced lung injury (VILI). Based on its function in vascular integrity, we hypothesize that the angiopoietin (Ang)-Tie2 system plays a role in the development of VILI. The present study was designed to examine the effects of mechanical ventilation on the Ang-Tie2 system in lung tissue. Moreover, we evaluated whether treatment with Ang-1, a Tie2 receptor agonist, protects against inflammation, vascular leakage and impaired gas exchange induced by mechanical ventilation. Methods Mice were anesthetized, tracheotomized and mechanically ventilated for 5 hours with either an inspiratory pressure of 10 cmH2O (‘low’ tidal volume ∼7.5 ml/kg; LVT) or 18 cmH2O (‘high’ tidal volume ∼15 ml/kg; HVT). At initiation of HVT-ventilation, recombinant human Ang-1 was intravenously administered (1 or 4 µg per animal). Non-ventilated mice served as controls. Results HVT-ventilation influenced the Ang-Tie2 system in lungs of healthy mice since Ang-1, Ang-2 and Tie2 mRNA were decreased. Treatment with Ang-1 increased Akt-phosphorylation indicating Tie2 signaling. Ang-1 treatment reduced infiltration of granulocytes and expression of keratinocyte-derived chemokine (KC), macrophage inflammatory protein (MIP)-2, monocyte chemotactic protein (MCP)-1 and interleukin (IL)-1β caused by HVT-ventilation. Importantly, Ang-1 treatment did not prevent vascular leakage and impaired gas exchange in HVT-ventilated mice despite inhibition of inflammation, vascular endothelial growth factor (VEGF) and Ang-2 expression. Conclusions Ang-1 treatment downregulates pulmonary inflammation, VEGF and Ang-2 expression but does not protect against vascular leakage and impaired gas exchange induced by HVT-ventilation.
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Tabruyn SP, Colton K, Morisada T, Fuxe J, Wiegand SJ, Thurston G, Coyle AJ, Connor J, McDonald DM. Angiopoietin-2-driven vascular remodeling in airway inflammation. THE AMERICAN JOURNAL OF PATHOLOGY 2010; 177:3233-43. [PMID: 20952594 DOI: 10.2353/ajpath.2010.100059] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Vascular remodeling is a feature of chronic inflammation during which capillaries transform into venules that expand the region of the vasculature in which leakage and leukocyte emigration both occur. Recently, we found that angiopoietin/Tie2 receptor signaling drives the transformation of capillaries into venules at an early stage of the sustained inflammatory response in the airways of mice infected with Mycoplasma pulmonis. However, the precise contributions of both angiopoietin-1 (Ang1) and angiopoietin-2 (Ang2) are not clear. In this study, we sought to determine the contribution of Ang2 to this vascular remodeling. Ang2 mRNA expression levels increased and phosphorylated Tie2 immunoreactivity in mucosal blood vessels decreased, indicative of diminished receptor signaling after infection. Selective inhibition of Ang2 throughout the infection by administration of either of two distinct function-blocking antibodies reduced the suppression of Tie2 phosphorylation and decreased the remodeling of mucosal capillaries into venules, the amount of leukocyte influx, and disease severity. These findings are consistent with Ang2 acting as an antagonist of Tie2 receptors and the reduction of Tie2 phosphorylation in endothelial cells rendering the vasculature more responsive to cytokines that promote both vascular remodeling and the consequences of inflammation after M. pulmonis infection. By blocking such changes, Ang2 inhibitors may prove beneficial in the treatment of sustained inflammation in which vascular remodeling, leakage, and leukocyte influx contribute to its pathophysiology.
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Affiliation(s)
- Sebastien P Tabruyn
- Cardiovascular Research Institute, Comprehensive Cancer Center, and Department of Anatomy, University of California, San Francisco, California 94143-0425, USA
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25
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Fukuhara S, Mochizuki N. [Vascular stabilization by angiopoietin-1.]. Nihon Yakurigaku Zasshi 2010; 136:26-30. [PMID: 20628210 DOI: 10.1254/fpj.136.26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Sun X, Ma SF, Wade MS, Flores C, Pino-Yanes M, Moitra J, Ober C, Kittles R, Husain AN, Ford JG, Garcia JGN. Functional variants of the sphingosine-1-phosphate receptor 1 gene associate with asthma susceptibility. J Allergy Clin Immunol 2010; 126:241-9, 249.e1-3. [PMID: 20624651 DOI: 10.1016/j.jaci.2010.04.036] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2009] [Revised: 03/15/2010] [Accepted: 04/23/2010] [Indexed: 01/16/2023]
Abstract
BACKGROUND The genetic mechanisms underlying asthma remain unclear. Increased permeability of the microvasculature is a feature of asthma, and the sphingosine-1-phosphate receptor (S1PR1) is an essential participant regulating lung vascular integrity and responses to lung inflammation. OBJECTIVE We explored the contribution of polymorphisms in the S1PR1 gene to asthma susceptibility. METHODS A combination of gene resequencing for single nucleotide polymorphism (SNP) discovery, case-control association, functional evaluation of associated SNPs, and protein immunochemistry studies was used. RESULTS Immunohistochemistry studies demonstrated significantly decreased S1PR1 protein expression in pulmonary vessels in lungs of asthmatic patients compared with those of nonasthmatic subjects (P < .05). Direct DNA sequencing of 27 multiethnic samples identified 39 S1PR1 variants (18 novel SNPs). Association studies were performed based on genotyping results from cosmopolitan tagging SNPs in 3 case-control cohorts from Chicago and New York totaling 1,061 subjects (502 cases and 559 control subjects). The promoter SNP rs2038366 (-1557G/T) was found to be associated with asthma (P = .03) in European Americans. In African Americans an association was found for both asthma and severe asthma for intronic SNP rs3753194 (c.-164+170A/G; P = .006 and P = .040, respectively) and for promoter SNP rs59317557 (-532C/G) with severe asthma (P = .028). Consistent with predicted in silico functionality, alleles of the promoter SNPs rs2038366 (-1557G/T) and rs59317557 (-532C/G) influenced the activity of a luciferase S1PR1 reporter vector in transfected endothelial cells exposed to growth factors (epidermal growth factor, platelet-derived growth factor, and vascular endothelial growth factor) known to be increased in asthmatic airways. CONCLUSION These data provide strong support for a role for S1PR1 gene variants in asthma susceptibility and severity.
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Affiliation(s)
- Xiaoguang Sun
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Ill, USA
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Makinde TO, Agrawal DK. Increased expression of angiopoietins and Tie2 in the lungs of chronic asthmatic mice. Am J Respir Cell Mol Biol 2010; 44:384-93. [PMID: 20463289 DOI: 10.1165/rcmb.2009-0330oc] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Angiopoietin (Ang)1 and Ang2 are ligands for Tie2 tyrosine kinase receptor (Tie2). Elevated levels of Ang1 and Ang2 in induced sputum of patients with asthma have been reported, with a positive correlation of Ang2 levels with the severity of airway occlusion. Although studies have shown Tie2-mediated regulation of nonvascular cells in some pathological conditions, current knowledge on Tie2 signaling in asthma is limited to the vasculature. We examined the expression pattern of Ang1, Ang2, vascular endothelial growth factor (VEGF), and Tie2 and their correlation with the degree of airway remodeling in the lung of ovalbumin (OVA)-sensitized and OVA-challenged mice with airway hyperresponsiveness. Lung tissues were isolated from Balb/c mice after OVA sensitization and challenge. Hematoxylin and eosin, periodic acid-Schiff, and trichrome staining were used to show the lung pathology. The expression of Ang1, Ang2, VEGF, and Tie2 was examined using immunofluorescence, Western blot, ELISA, and real-time PCR. In the lung of normal mice, Tie2 expression was detected only in the blood vessels. However, in the lung of OVA-sensitized and OVA-challenged mice, Tie2 was abundantly expressed in airway epithelial cells and in a subset of macrophages in addition to constitutive expression in pulmonary vessels. The increase in Tie2 expression correlated with the severity of airway remodeling. Macrophages and airway epithelial cells express Ang2 and VEGF only in allergic models. Ang1 was constitutively expressed, with a decrease in mRNA level in allergic models. In conclusion, increased expression of Tie2 and Ang2 in allergic airway epithelium and alveolar macrophages correlates with the severity of airway remodeling.
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Affiliation(s)
- Toluwalope O Makinde
- Center for Clinical and Translational Science, Creighton University School of Medicine, Omaha, NE 68178, USA
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Park HS, Kim SY, Kim SR, Lee YC. Targeting abnormal airway vascularity as a therapeutical strategy in asthma. Respirology 2010; 15:459-71. [PMID: 20337993 DOI: 10.1111/j.1440-1843.2010.01724.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Asthma is a chronic inflammatory disease of airways, characterized by airway hyperresponsiveness and airflow limitation with acute bronchoconstriction, swelling of the airway wall, chronic mucus plug formation and airway wall remodelling. Functional and structural changes in the vasculature of asthmatic airways have been documented, and the signalling mechanisms are complex and have recently attracted much attention. The vascular changes may affect inflammatory cell recruitment, airway hyperresponsiveness and the regulation of airway calibre, and further, the level of disease control. Many critical factors are involved in the pathophysiological regulation of vascular changes in bronchial asthma, and the actions of these factors must be very carefully orchestrated. By better understanding the complicated actions of each factor, we may be able to advance further in asthma treatment.
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Affiliation(s)
- Hee Sun Park
- Department of Internal Medicine, Chungnam National University School of Medicine, Jeonju, South Korea
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Affiliation(s)
- Wendy C Moore
- Section on Pulmonary, Critical Care, Allergy and Immunologic Diseases and the Center for Human Genomics, Wake Forest University, Winston-Salem, NC 27106, USA.
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Simoes DCM, Xanthou G, Petrochilou K, Panoutsakopoulou V, Roussos C, Gratziou C. Osteopontin Deficiency Protects against Airway Remodeling and Hyperresponsiveness in Chronic Asthma. Am J Respir Crit Care Med 2009; 179:894-902. [DOI: 10.1164/rccm.200807-1081oc] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Current World Literature. Curr Opin Allergy Clin Immunol 2009; 9:177-84. [DOI: 10.1097/aci.0b013e328329f9ca] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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van Meurs M, Kümpers P, Ligtenberg JJM, Meertens JHJM, Molema G, Zijlstra JG. Bench-to-bedside review: Angiopoietin signalling in critical illness - a future target? CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2009; 13:207. [PMID: 19435476 PMCID: PMC2689450 DOI: 10.1186/cc7153] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Multiple organ dysfunction syndrome (MODS) occurs in response to major insults such as sepsis, severe haemorrhage, trauma, major surgery and pancreatitis. The mortality rate is high despite intensive supportive care. The pathophysiological mechanism underlying MODS are not entirely clear, although several have been proposed. Overwhelming inflammation, immunoparesis, occult oxygen debt and other mechanisms have been investigated, and – despite many unanswered questions – therapies targeting these mechanisms have been developed. Unfortunately, only a few interventions, usually those targeting multiple mechanisms at the same time, have appeared to be beneficial. We clearly need to understand better the mechanisms that underlie MODS. The endothelium certainly plays an active role in MODS. It functions at the intersection of several systems, including inflammation, coagulation, haemodynamics, fluid and electrolyte balance, and cell migration. An important regulator of these systems is the angiopoietin/Tie2 signalling system. In this review we describe this signalling system, giving special attention to what is known about it in critically ill patients and its potential as a target for therapy.
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Affiliation(s)
- Matijs van Meurs
- Department of Critical Care, University Medical Center Groningen, University of Groningen, 9700RB Groningen, The Netherlands
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