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Visca D, Centis R, Pontali E, Zampogna E, Russell AM, Migliori GB, Andrejak C, Aro M, Bayram H, Berkani K, Bruchfeld J, Chakaya JM, Chorostowska-Wynimko J, Crestani B, Dalcolmo MP, D'Ambrosio L, Dinh-Xuan AT, Duong-Quy S, Fernandes C, García-García JM, de Melo Kawassaki A, Carrozzi L, Martinez-Garcia MA, Martins PC, Mirsaeidi M, Mohammad Y, Naidoo RN, Neuparth N, Sese L, Silva DR, Solovic I, Sooronbaev TM, Spanevello A, Sverzellati N, Tanno L, Tiberi S, Vasankari T, Vasarmidi E, Vitacca M, Annesi-Maesano I. Clinical standards for diagnosis, treatment and prevention of post-COVID-19 lung disease. Int J Tuberc Lung Dis 2023; 27:729-741. [PMID: 37749839 PMCID: PMC10519381 DOI: 10.5588/ijtld.23.0248] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 06/06/2023] [Indexed: 09/27/2023] Open
Abstract
BACKGROUND: The aim of these clinical standards is to provide guidance on 'best practice' care for the diagnosis, treatment and prevention of post-COVID-19 lung disease.METHODS: A panel of international experts representing scientific societies, associations and groups active in post-COVID-19 lung disease was identified; 45 completed a Delphi process. A 5-point Likert scale indicated level of agreement with the draft standards. The final version was approved by consensus (with 100% agreement).RESULTS: Four clinical standards were agreed for patients with a previous history of COVID-19: Standard 1, Patients with sequelae not explained by an alternative diagnosis should be evaluated for possible post-COVID-19 lung disease; Standard 2, Patients with lung function impairment, reduced exercise tolerance, reduced quality of life (QoL) or other relevant signs or ongoing symptoms ≥4 weeks after the onset of first symptoms should be evaluated for treatment and pulmonary rehabilitation (PR); Standard 3, The PR programme should be based on feasibility, effectiveness and cost-effectiveness criteria, organised according to local health services and tailored to an individual patient's needs; and Standard 4, Each patient undergoing and completing PR should be evaluated to determine its effectiveness and have access to a counselling/health education session.CONCLUSION: This is the first consensus-based set of clinical standards for the diagnosis, treatment and prevention of post-COVID-19 lung disease. Our aim is to improve patient care and QoL by guiding clinicians, programme managers and public health officers in planning and implementing a PR programme to manage post-COVID-19 lung disease.
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Affiliation(s)
- D Visca
- Division of Pulmonary Rehabilitation, Istituti Clinici Scientifici (ICS) Maugeri, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Tradate, Department of Medicine and Surgery, Respiratory Diseases, University of Insubria, Varese
| | - R Centis
- Respiratory Diseases Clinical Epidemiology Unit, Istituti Clinici Scientifici Maugeri, IRCCS, Tradate
| | - E Pontali
- Department of Infectious Diseases, Galliera Hospital, Genoa, Italy
| | - E Zampogna
- Division of Pulmonary Rehabilitation, Istituti Clinici Scientifici (ICS) Maugeri, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Tradate
| | - A-M Russell
- Faculty of Health and Life Sciences, University of Exeter, Exeter, Royal Devon University Hospitals NHS Trust, Exeter, North Bristol NHS Trust, Bristol, UK
| | - G B Migliori
- Respiratory Diseases Clinical Epidemiology Unit, Istituti Clinici Scientifici Maugeri, IRCCS, Tradate
| | - C Andrejak
- Respiratory Department, Centre Hospitalier Universitaire Amiens Picardie, Amiens, Unité de Recherche 4294, Agents Infectieux, Résistance et Chimiothérapie, Picardie Jules Verne University, Amiens, GREPI (Group pour la Recherche et enseignement en pneumo-infectiologie) Work group of French society of respiratory diseases, Paris, France
| | - M Aro
- Finnish Lung Health Association (FILHA), Helsinki, Finland
| | - H Bayram
- Department of Pulmonary Medicine, Koc University Research Center for Translational Medicine, Koc University School of Medicine, Istanbul, Turkey
| | - K Berkani
- Pierre de Soleil Clinic, Respiratory Rehabilitation, Vetraz Monthoux, France
| | - J Bruchfeld
- Department of Infectious Diseases, Karolinska University Hospital, Stockholm, Division of Infectious Diseases, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - J M Chakaya
- Department of Medicine, Therapeutics and Dermatology, Kenyatta University, Nairobi, Kenya, Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - J Chorostowska-Wynimko
- Department of Genetics and Clinical Immunology, National Institute of Tuberculosis and Lung Diseases, Warsaw, Poland
| | - B Crestani
- Université Paris Cité, Physiopathologie et épidémiologie des maladies respiratoires, Institut national de la santé et de la recherche médicale (INSERM), Paris, Assistance Publique des Hôpitaux de Paris (APHP), Hôpital Bichat, Service de Pneumologie A, FHU APOLLO, Paris, France
| | - M P Dalcolmo
- Hélio Fraga Reference Center, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, RJ, Brazil
| | - L D'Ambrosio
- Public Health Consulting Group, Lugano, Switzerland
| | - A-T Dinh-Xuan
- Service de Physiologie-Explorations Fonctionnelles, APHP, Hôpital Cochin, Université Paris Cité, Paris, France
| | - S Duong-Quy
- Respiratory Department, Lam Dong Medical College, Dalat, Vietnam
| | - C Fernandes
- Heart Institute, Cardio-pulmonology Department, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - J-M García-García
- Tuberculosis Research Programme (PII-TB), Sociedad Española de Neumología y Cirugía Torácica, Barcelona, Spain
| | - A de Melo Kawassaki
- Serviço de Pneumologia, Instituto do Câncer do Estado de São Paulo (ICESP) e do ambulatÓrio de Doenças Pulmonares Intersticiais, Hospital das Clínicas, Universidade de São Paulo, São Paulo, SP, Brazil
| | - L Carrozzi
- Department of Surgical, Medical, and Molecular Pathology and Critical Care Medicine, University of Pisa, Pisa, Pulmonary Unit, Cardiothoracic and Vascular Department, University Hospital of Pisa, Pisa, Italy
| | - M A Martinez-Garcia
- Respiratory Department, University and Polytechnic La Fe Hospital, Valencia, Centro de InvestigaciÓn Biomédica en Red, Respiratory Disorders, Madrid, Spain
| | - P Carreiro Martins
- Allergy and Clinical Immunology Department, Dona Estefânia Hospital, Centro Hospitalar Universitário de Lisboa Central, Lisbon, NOVA Medical School-Comprehensive Health Research Center, Lisbon, Portugal
| | - M Mirsaeidi
- Division of Pulmonary and Critical Care, University of Florida, Jacksonville, FL, USA
| | - Y Mohammad
- Al Sham private University, Faculty of Medicine and Pharmacy, Damascus and Latakia, Centre for Research on Chronic Respiratory Diseases, Tishreen University, Lattakia, Syria
| | - R N Naidoo
- Discipline of Occupational and Environmental Health, University of KwaZulu-Natal, Durban, South Africa
| | - N Neuparth
- Allergy and Clinical Immunology Department, Dona Estefânia Hospital, Centro Hospitalar Universitário de Lisboa Central, Lisbon, NOVA Medical School-Comprehensive Health Research Center, Lisbon, Portugal
| | - L Sese
- Department of Physiology and Functional Explorations, Hôpital Avicenne, INSERM, Unité mixte de recherche 1272 Hypoxia and the Lung, Université Sorbonne Paris Nord, Bobigny, Department of Pneumology, Centre Constitutif de référence des maladies pulmonaires rares, Hôpital Avicenne, Bobigny, France
| | - D R Silva
- Faculdade de Medicina, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
| | - I Solovic
- National Institute for TB, Lund Diseases and Thoracic Surgery, Vysne Hagy, Catholic University, Ruzomberok, Slovakia
| | - T M Sooronbaev
- Department of Respiratory Medicine, National Center for Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
| | - A Spanevello
- Division of Pulmonary Rehabilitation, Istituti Clinici Scientifici (ICS) Maugeri, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Tradate, Department of Medicine and Surgery, Respiratory Diseases, University of Insubria, Varese
| | - N Sverzellati
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - L Tanno
- Institut Desbrest of Epidemiology and Santé Publique, INSERM & Montpellier University, Montpellier and Department of Allergic and Respiratory Diseases, Montpellier University Hospital, Montpellier, France
| | - S Tiberi
- Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - T Vasankari
- FILHA, Helsinki, University of Turku, Department of Pulmonary Diseases and Clinical Allergology, Turku, Finland
| | - E Vasarmidi
- Department of Respiratory Medicine and Laboratory of Molecular and Cellular Pneumonology, School of Medicine, University of Crete, Heraklion, Greece
| | - M Vitacca
- ICS Maugeri IRCCS, Respiratory Rehabilitation of the Institute of Lumezzane, Brescia, Italy
| | - I Annesi-Maesano
- Institut Desbrest of Epidemiology and Santé Publique, INSERM & Montpellier University, Montpellier and Department of Allergic and Respiratory Diseases, Montpellier University Hospital, Montpellier, France
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Bayram H, Dundar O, Donmez Cakil Y, Uyar EE, Cincik M. Anti-Müllerian hormone as a predictor of pregnancy in women under 35 years with unexplained infertility undergoing ICSI: a retrospective study. Minerva Obstet Gynecol 2021; 74:117-122. [PMID: 33904685 DOI: 10.23736/s2724-606x.21.04727-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Anti-Müllerian hormone (AMH) is a well-established marker for the determination of ovarian reserve. However, its role in the prediction of pregnancy is still under debate. In this retrospective study, we aimed to evaluate the relationship of serum AMH levels with pregnancy rates in patients with unexplained infertility undergoing ICSI. Moreover, we compared the predictive value of AMH with that of antral follicle count (AFC). METHODS Records of 76 patients under 35 years of age with AMH levels between 1 and 3.5 ng/ml were examined retrospectively. Participants were divided into groups based on their AMH level and age. RESULTS AMH levels in women under 30 years were found significantly higher than those in women over 30 years (P=0.033). 57 of 76 patients (75%) were pregnant. Age did not have a significant effect on the pregnancy rates in the selected study group (P=0.252). On the other hand, despite the poor predictive accuracy, serum AMH was shown to have a predictive value with a cut-off point of 1.95 ng/mL. Logistic regression tests demonstrated a higher pregnancy rate (3.396 fold) with an AMH level 1.95 or above. There was no significant relationship between AFC and pregnancy. CONCLUSIONS AMH might have a role in the prediction of pregnancy after ICSI in patients under 35 years with unexplained infertility.
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Affiliation(s)
- Hale Bayram
- Clinical Embryology Master Program, Institute of Graduate Studies, Maltepe University, İstanbul, Turkey
| | - Ozgur Dundar
- Obstetrics and Gynecology Department, Kadıköy Florence Nightingale Hospital, İstanbul, Turkey
| | - Yaprak Donmez Cakil
- Department of Histology and Embryology, Faculty of Medicine, Maltepe University, İstanbul, Turkey
| | - Elif E Uyar
- Acıbadem Health Group, Altunizade Hospital IVF Center, Acıbadem University, İstanbul, Turkey
| | - Mehmet Cincik
- Department of Histology and Embryology, Faculty of Medicine, Maltepe University, İstanbul, Turkey -
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Ozturk A, Bayraktar R, Gogebakan B, Mumbuc S, Bayram H. Comparison of inflammatory cytokine release from nasal epithelial cells of non-atopic non-rhinitic, allergic rhinitic and polyp subjects and effects of diesel exhaust particles in vitro. Allergol Immunopathol (Madr) 2017; 45:473-481. [PMID: 28259510 DOI: 10.1016/j.aller.2016.10.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 10/31/2016] [Indexed: 10/20/2022]
Abstract
BACKGROUND Although studies have reported an association between air pollutants and increased allergic airway diseases, such as allergic rhinitis and nasal polyposis, the underlying mechanisms are not fully understood. A limited number of studies have suggested that diesel exhaust particles (DEP) play a role in atopy and the pathogenesis of allergic upper airway diseases. The aim of this study was to investigate the effect of DEP on inflammatory cytokine release, and mRNA expression of transcription factors such as JNK and NF-β in primary nasal epithelial cells (NECs), in vitro. METHODS NECs from non-atopic, non-rhinitic subjects (controls) and patients with allergic rhinitis and nasal polyps were cultured and incubated with 0-100μg/ml DEP for 24h. ELISA and RT-PCR were used to assess the release of IL-8, GM-CSF, and RANTES, and mRNA expression for JNK and NF-κB, respectively. RESULTS Compared to control cells, NECs from subjects with atopic polyps released significantly greater amounts of IL-8 (median=887 vs. 176.6pg/μg cellular protein; p<0.0001) and RANTES (median=0.191 vs. 0.02pg/μg cellular protein; p<0.001). While 50μg/ml DEP induced release of RANTES in NECs from patients with allergic rhinitis, 100μg/ml DEP decreased IL-8 levels in NECs from both control and allergic rhinitic subjects. DEP did not affect mRNA expression for JNK and NF-κB from NECs of subjects with polyps. CONCLUSIONS NECs from subjects with various pathologies may respond differently to DEP.
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Bayram H, Sayadi A, Goenaga J, Immonen E, Arnqvist G. Novel seminal fluid proteins in the seed beetle Callosobruchus maculatus identified by a proteomic and transcriptomic approach. Insect Mol Biol 2017; 26:58-73. [PMID: 27779332 DOI: 10.1111/imb.12271] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The seed beetle Callosobruchus maculatus is a significant agricultural pest and increasingly studied model of sexual conflict. Males possess genital spines that increase the transfer of seminal fluid proteins (SFPs) into the female body. As SFPs alter female behaviour and physiology, they are likely to modulate reproduction and sexual conflict in this species. Here, we identified SFPs using proteomics combined with a de novo transcriptome. A prior 2D-sodium dodecyl sulphate polyacrylamide gel electrophoresis analysis identified male accessory gland protein spots that were probably transferred to the female at mating. Proteomic analysis of these spots identified 98 proteins, a majority of which were also present within ejaculates collected from females. Standard annotation workflows revealed common functional groups for SFPs, including proteases and metabolic proteins. Transcriptomic analysis found 84 transcripts differentially expressed between the sexes. Notably, genes encoding 15 proteins were highly expressed in male abdomens and only negligibly expressed within females. Most of these sequences corresponded to 'unknown' proteins (nine of 15) and may represent rapidly evolving SFPs novel to seed beetles. Our combined analyses highlight 44 proteins for which there is strong evidence that they are SFPs. These results can inform further investigation, to better understand the molecular mechanisms of sexual conflict in seed beetles.
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Affiliation(s)
- H Bayram
- Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - A Sayadi
- Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - J Goenaga
- Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - E Immonen
- Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - G Arnqvist
- Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
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Gogebakan B, Bayraktar R, Ulaslı M, Oztuzcu S, Tasdemir D, Bayram H. The role of bronchial epithelial cell apoptosis in the pathogenesis of COPD. Mol Biol Rep 2014; 41:5321-7. [PMID: 24871992 DOI: 10.1007/s11033-014-3403-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 05/06/2014] [Indexed: 11/30/2022]
Abstract
There is an increased airway inflammation in the pathogenesis of chronic obstructive pulmonary disease (COPD), and it has been suggested that there may also be problem in the apoptosis and renewal of cells. However, there are limited human airway cell studies, in particular those from larger airways such as bronchi. We cultured primary human bronchial epithelial cells (HBECs) from bronchial explants of smokers (n = 6) without COPD and smokers with COPD (n = 8). Apoptosis was studied by fluorescence activated cell sorting. qRT-PCR was used to assess mRNA expression for proteins involving apoptosis including p21(CIP1/WAF1), p53, caspase-8 and caspase-9. Although there was no difference in the rate of viable cells between cells from smokers and COPDs, the level of early apoptotic cells was significantly increased in COPD cells [mean ± standard error of mean (SEM) = 4.86 ± 3.2 %, p = 0.015] as compared to smokers (mean ± SEM = 2.71 ± 1.62 %). In contrast, the rate of late apoptotic cells was significantly decreased in COPD cells (mean ± SEM = 9.82 ± 5.71 %) comparing to smokers (mean ± SEM = 15.21 ± 5.08 %, p = 0.003). Although expression of mRNA for p21(CIP1/WAF1) and caspase-9 was similar in both groups, p53 and caspase-8 mRNA expression was significantly greater in COPD cells. These findings suggest that HBEC apoptosis is increased in COPD, and that this involves p53 and caspase-8 pathways.
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Affiliation(s)
- B Gogebakan
- Department of Medical Biology, Faculty of Medicine, School of Medicine, Mustafa Kemal University, 31034, Hatay, Turkey,
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Keskin O, Balaban S, Keskin M, Kucukosmanoglu E, Gogebakan B, Ozkars M, Kul S, Bayram H, Coskun Y. Relationship between exhaled leukotriene and 8-isoprostane levels and asthma severity, asthma control level, and asthma control test score. Allergol Immunopathol (Madr) 2014; 42:191-7. [PMID: 23265270 DOI: 10.1016/j.aller.2012.09.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2012] [Revised: 09/08/2012] [Accepted: 09/23/2012] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Exhaled breath condensate (EBC) is a completely non-invasive method for the collection of airway secretions to measure intense inflammation in the airways of asthmatics. It has been shown that the childhood asthma control test (c-ACT) is a good tool for use in the evaluation of asthmatics. Whether the c-ACT score and asthma control level correlate with the airway inflammation is not well known. We aimed to evaluate the relationship between exhaled cysteinyl leukotrienes (Cys-LTs) and 8-isoprostane levels and asthma severity, asthma control level and c-ACT score in asthmatic children. METHODS Thirty asthmatic children were evaluated with c-ACT score and pulmonary function tests. Asthma severity and asthma control level were assessed according to GINA. EBC was collected and Cys-LTs and 8-isoprostane concentrations were determined using a specific immunoassay kit. RESULTS Exhaled 8-isoprostane level in patients with moderate persistent asthma [114 (55-146)pg/ml] was higher than in the mild persistent group [52 (21-91)pg/ml] (p=0.05, Mann-Whitney U [MWU]). EBC 8-isoprostane in children with 1-4 asthma exacerbations/year [52 (16-80)pg/ml] was significantly lower than in children with >4 asthma exacerbations/year [114 (57-129)pg/ml] (p<0.05, MWU). No significant relation was determined between exhaled 8-isoprostane and Cys-LTs levels and c-ACT score and asthma control level. Exhaled 8-isoprostane correlated negatively with bronchodilator response (p=0.015, r=-0.45). CONCLUSIONS Exhaled 8-isoprostane, as an oxidative stress specifier, was found to be increased in relation with asthma exacerbation frequency and oxidative stress increases with the severity of asthma. In contrast to asthma severity level, c-ACT score and asthma control level may not reflect airway inflammation.
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Durmaz T, Bayram H, Bayram N, Sari C, Keles T, Bastug S, Bozkurt E. Effect of coronary artery bypass surgery on left ventricular function as assessed by strain and strain rate imaging. Perfusion 2013; 29:425-33. [PMID: 24304544 DOI: 10.1177/0267659113513920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
INTRODUCTION This study examined the effect of coronary artery revascularization on left ventricular function and the results of strain imaging for the detection of ischemia before and after coronary artery bypass graft (CABG) surgery. MATERIAL AND METHODS Sixty-eight patients with a history of coronary artery disease (CAD) were included, prospectively. Conventional echocardiography and color tissue Doppler-derived strain-strain rate echocardiographic imaging were performed 24 hours before and 3 months after CABG surgery. RESULTS While strain rate values of the basal septum, middle segment of the lateral wall, middle segment of the inferior wall, and middle and basal segments of the anterior wall were significantly increased, other segments did not change after the operation. The mean systolic strain rate value was significantly increased after the operation. Left ventricle strain values in the middle segment of the septum, middle and basal segments of the inferior wall, and middle and basal segments of the anterior wall were significantly increased after the operation. No significant difference was noted in the basal septum or the middle and basal segments of the lateral wall after the operation. The mean systolic strain value was significantly increased after the operation. CONCLUSION The results of this study suggest that strain and strain rate echocardiography can provide an accurate evaluation of regional contractile function after CABG, even in the segments that are apparently normal.
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Affiliation(s)
- T Durmaz
- Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey
| | - H Bayram
- Department of Cardiovascular Surgery, Ataturk Education and Research Hospital, Ankara, Turkey
| | - Na Bayram
- Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey
| | - C Sari
- Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey
| | - T Keles
- Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey
| | - S Bastug
- Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey
| | - E Bozkurt
- Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey
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Hidiroglu M, Kucuker A, Erdogan KE, Bayram H, Bilgic A, Durmaz T, Sener E. 191-I * INFECTIVE ENDOCARDITIS AFTER TRANSCATHETER AORTIC VALVE IMPLANTATION. Interact Cardiovasc Thorac Surg 2013. [DOI: 10.1093/icvts/ivt372.191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hidiroglu M, Kucuker A, Cetin L, Bayram H, Sağlam F, Sener E. Bentall procedure in Takayasu arteritis. J Cardiothorac Surg 2013. [PMCID: PMC3844825 DOI: 10.1186/1749-8090-8-s1-p17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kucuker A, Hidiroglu M, Bayram H, Gokcimen M, Ercelik U, Sener E. Surgery for severe tricuspid valve regurgitation following blunt thoracic trauma. J Cardiothorac Surg 2013. [PMCID: PMC3846115 DOI: 10.1186/1749-8090-8-s1-p75] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Bayram H, Erer D, Iriz E, Hakan Zor M, Gulbahar O, Ozdogan ME. Comparison of the effects of pulsatile cardiopulmonary bypass, non-pulsatile cardiopulmonary bypass and off-pump coronary artery bypass grafting on the respiratory system and serum carbonyl. Perfusion 2012; 27:378-85. [PMID: 22623425 DOI: 10.1177/0267659112449036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND We aimed to investigate the effects of off-pump coronary artery bypass grafting (CABG), pulsatile cardiopulmonary bypass (CPB), and non-pulsatile CPB techniques on oxidative stress and the respiratory system in the current study. MATERIALS AND METHODS The patients were allocated into three different groups according to perfusion techniques, as follows: off-pump CABG group (n=10); pulsatile CPB (n=11); and non-pulsatile CPB group (n=11). Serum carbonyl level was measured and a pulmonary function test was performed preoperatively and postoperatively. RESULTS The postoperative increase in the carbonyl level was significantly lower in the off-pump CABG group compared to the other two groups, while there was no significant difference between the pulsatile and non-pulsatile CPB groups with respect to carbonyl levels. Arterial partial pressure of oxygen, forced expiratory volume in one second, and forced vital capacity were significantly higher in the off-pump CABG group compared to other two groups in the postoperative period. CONCLUSION We found that off-pump CABG had less negative effects on oxidative stress and the respiratory system compared to pulsatile CPB and non-pulsatile CPB techniques. Additionally, there was no significant difference between pulsatile and non-pulsatile CPB.
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Affiliation(s)
- H Bayram
- Department of Cardiovascular Surgery, Gazi University Faculty of Medicine, Ankara, Turkey.
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Bayram H, Erer D, Iriz E, Zor MH, Gulbahar O, Ozdogan ME. Comparison of the effects of pulsatile cardiopulmonary bypass, non-pulsatile cardiopulmonary bypass and off-pump coronary artery bypass grafting on the inflammatory response and S-100beta protein. Perfusion 2011; 27:56-64. [DOI: 10.1177/0267659111424639] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background: We aimed to investigate the effects of off-pump coronary artery bypass grafting, pulsatile cardiopulmonary bypass, and non-pulsatile cardiopulmonary bypass techniques on the inflammatory response and the central nervous system in the current study. Methods: A total of 32 patients who were scheduled for elective coronary artery bypass graft surgery were included in the study. The patients were allocated into three different groups according to the perfusion techniques used during the cardiopulmonary bypass procedure as follows: off-pump coronary artery bypass grafting group (n=10); pulsatile cardiopulmonary bypass group (n=11); and non-pulsatile cardiopulmonary bypass group (n=11). Serum interleukin-6, interleukin-8, tumor necrosis factor-alpha and S-100beta levels were measured preoperatively, and at 0, 6, and 24 hours postoperatively. Results: The postoperative increase in the levels of interleukin-6 and interleukin-8 was significantly lower in the off-pump group compared to the other two groups (p<0.05), while there was no significant difference in tumor necrosis factor-alpha levels between the groups. Postoperative S-100β levels, an indicator of cerebral injury, was significantly lower in the off-pump CABG group compared to the other two groups (p<0.05). Conclusion: We found that off-pump coronary artery bypass grafting had less negative effects on inflammatory response and central nervous system compared to pulsatile cardiopulmonary bypass and non-pulsatile cardiopulmonary bypass techniques.
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Affiliation(s)
- H Bayram
- Department of Cardiovascular Surgery, Gazi University Faculty of Medicine, Ankara, Turkey
| | - D Erer
- Department of Cardiovascular Surgery, Gazi University Faculty of Medicine, Ankara, Turkey
| | - E Iriz
- Department of Cardiovascular Surgery, Gazi University Faculty of Medicine, Ankara, Turkey
| | - MH Zor
- Department of Cardiovascular Surgery, Gazi University Faculty of Medicine, Ankara, Turkey
| | - O Gulbahar
- Department of Biochemistry, Gazi University Faculty of Medicine, Ankara, Turkey
| | - ME Ozdogan
- Department of Cardiovascular Surgery, Gazi University Faculty of Medicine, Ankara, Turkey
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Bayram H, Keskin H, Dundar H, Simsek E, Katircioglu S. PP-288: A SUCCESSFUL CASE REPORT OF HYBRID SURGERY: CAROTID ARTERY ENDARTERECTOMY-PATCHPLASTY AND BYPASS GRAFTING FROM LEFT ILIAC ARTERY TO SUPERIOR MESENTERIC ARTERY USING THE HEPARINIZED POLYTETRAFLUORETHYLENE GRAFT. Int J Cardiol 2011. [DOI: 10.1016/s0167-5273(11)70455-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Saltoglu N, Dalkiran A, Tetiker T, Bayram H, Tasova Y, Dalay C, Sert M. Piperacillin/tazobactam versus imipenem/cilastatin for severe diabetic foot infections: a prospective, randomized clinical trial in a university hospital. Clin Microbiol Infect 2010; 16:1252-7. [DOI: 10.1111/j.1469-0691.2009.03067.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Tasar F, Bayram H, Kan B, Saysel M, Ozisik Y, Akova M. Importance of multidisciplinary approach for two different cases treated with zoledronic acid: 2 case reports. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
Particulate air pollution is associated with respiratory morbidity and has cytotoxic and pro-inflammatory effects. The effects of diesel exhaust particles (DEP) on proliferation and apoptosis of A549 lung epithelial cells were examined. When deprived of serum (serum starvation), epithelial cell numbers fell, but DEP (5-200 microg.mL-1) prevented this. Using flow cytometric analysis of propidium iodide (PI) staining, DEP (10 microg.mL-1) increased cells in the S phase of cell cycle from 12.85 to 18.75% after 48 h, reversing serum starvation-induced G0/1 arrest. DEP also reduced the increase in apoptotic cells, as defined by double expression of annexin V/PI, observed after serum starvation (from 28.35 to 15.46%). The antioxidants, N-acetylcysteine (NAC; 33 mM) and AEOL10113 (10-100 microM), the N-terminal c-jun kinase inhibitor, SP600125 (33 microM), and nuclear factor-kappaB inhibitor, SN50 (33 microM), inhibited DEP-induced cell number increase. NAC inhibited DEP-induced reduction of G0/1 and increase in cells in the S and G2/M phases. Expression of p21CIP1/WAF1 mRNA and protein seen with serum starvation was reduced by DEP. In conclusion, diesel exhaust particles prevented serum starvation-led decreases in A549 epithelial cells by inducing cell cycle progression and preventing apoptosis, processes involving oxidative stress, inhibition of p21CIP1/WAF1 expression and stimulation of N-terminal c-jun kinase and nuclear factor-kappaB. Therefore, low-dose diesel exhaust particle exposure may lead to lung epithelial cell hyperplasia.
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Affiliation(s)
- H Bayram
- Thoracic Medicine, National Heart and Lung Institute, Imperial College, London SW3 6LY, UK
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Bayram H, Rusznak C, Khair OA, Sapsford RJ, Abdelaziz MM. Effect of ozone and nitrogen dioxide on the permeability of bronchial epithelial cell cultures of non-asthmatic and asthmatic subjects. Clin Exp Allergy 2002; 32:1285-92. [PMID: 12220465 DOI: 10.1046/j.1365-2745.2002.01435.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Although epidemiological as well as in vivo exposure studies suggest that ozone (O3) and nitrogen dioxide (NO2) may play a role in airway diseases such as asthma, the underlying mechanisms are not clear. OBJECTIVE Our aim was to investigate the effect of O3 and NO2 on the permeability of human bronchial epithelial cell (HBEC) cultures obtained from non-atopic non-asthmatic (non-asthmatics) and atopic mild asthmatic (asthmatics) individuals. METHODS We cultured HBECs from bronchial biopsies of non-asthmatics and asthmatics, and exposed these for 6 h to air, 10 to 100 parts per billion (p.p.b.) O3, or to 100 to 400 p.p.b. NO2, and assessed changes in electrical resistance (ER) and movement of 14C-BSA across the cell cultures. RESULTS Although exposure to either O3 or NO2 did not alter the permeability of HBEC cultures of non-asthmatics, 10 to 100 p.p.b. O3 and 400 p.p.b. NO2 significantly decreased the ER of HBEC cultures of asthmatics, when compared with exposure to air. Additionally, 10, 50 and 100 p.p.b. O3 led to a significant increase in the movement of 14C-BSA across asthmatic HBEC cultures, after 6 h of exposure (medians = 1.73%; P < 0.01, 1.50%; P < 0.05 and 1.53%, P < 0.05, respectively), compared with air exposed cultures (median = 0.89%). Similarly, exposure for 6 h to both 200 and 400 p.p.b. NO2 significantly increased the movement of 14C-BSA across asthmatic HBEC cultures, when compared with air exposure. A comparison of data obtained from the two study groups demonstrated that 10 to 100 p.p.b. O3- and 200 to 400 p.p.b. NO2-induced epithelial permeability was greater in cultures of asthmatics compared with non-asthmatics. CONCLUSION These results suggest that HBECs of asthmatics may be more susceptible to the deleterious effects of these pollutants. Whether in patients with asthma the greater susceptibility of bronchial epithelial cells to O3 and NO2 contributes to the development of the disease, or is a secondary characteristic of this condition, remains to be determined.
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Affiliation(s)
- H Bayram
- Academic Department of Respiratory Medicine, St Bartholomew's and the Royal London School of Medicine and Dentistry, London, UK.
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Turhanoğlu AD, Karabulut Z, Bayram H, Turhanoğlu S, Erdoğan F, Apak I, Yayla V. Botulinum toxin A in the treatment of spasticity - An open label study. J Back Musculoskelet Rehabil 2002; 16:51-6. [PMID: 22387399 DOI: 10.3233/bmr-2002-162-301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
PURPOSE To assess the efficacy of botulinum toxin type A in spasticity in upper-motor neuron syndromes. METHODS Twenty-three patients with spasticity resulted from stroke-related hemiplegia, transverse myelitis and multiple sclerosis took part in the study. Following the history and physical examinations of the patients, injections of botulinum toxin-A were applied. The dose ranged from 80 to 400 mouse unit (MU) depending on the size of the muscle injected. In all patients, spasticity, spasms and pain were measured using the Ashworth Scale, Spasm Frequency Score, and Visual Analogue Scale prior to the therapy, at the 1st week, 1st month and 3rd month of the therapy. RESULTS In all patients, botulinum toxin type A led to a significant decrease in spasticity, spasms and pain after the 1st week, 1st and 3 rd months of the treatment when compared to the baseline values (p<0.001). No significant side effects or complications were observed. CONCLUSION Our results have demonstrated that botulinum toxin type A is effective in the management of patients with spasticity due to stroke-related hemiplegia, transverse myelitis and multiple sclerosis, without major adverse effects.
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Affiliation(s)
- A D Turhanoğlu
- School of Medicine, University of Dicle, Diyarbakir, Turkey
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Senyiğit A, Bayram H, Babayiğit C, Topçu F, Balci AE, Satici O. Comparison of the effectiveness of some pleural sclerosing agents used for control of effusions in malignant pleural mesothelioma: a review of 117 cases. Respiration 2001; 67:623-9. [PMID: 11124644 DOI: 10.1159/000056291] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Management of malignant pleural mesothelioma (MPM) has been an important clinical issue regardless of the treatment modality employed. We aimed to investigate the efficacy of oxytetracycline (OT), Corynebacterium parvum (CP), and nitrogen mustard (NM) in the management of pleural effusion associated with MPM. METHODS One hundred and seventeen patients who had stage-2 MPM or over according to the Butchart staging system and unilateral or bilateral pleural effusion took part in the study. The patients received either OT (35 mg/kg), CP (7 mg), or NM (0.4 mg/kg) through a chest tube for pleurodesis. The association between several clinical parameters and patient survival was also investigated. RESULTS OT was applied to 59, CP to 29 and NM to 29 cases. A statistical analysis of the results obtained by these agents have demonstrated that OT (30 days, 81%; 90 days, 76.2%) and CP (30 days, 86.2%; 90 days, 79.3%) led to a significantly higher rate of successful pleurodesis as compared to NM (30 days, 48.2%; 90 days, 41.3%; p <0.05). Although the procedure was generally well tolerated by the patients, the NM-treated group experienced significantly more nausea-vomiting (46.1%) and hypotension (35.8%) compared to patients who received OT (nausea-vomiting and hypotension 4.3%; p < 0.001) and CP (nausea-vomiting and hypotension 5.1%; p < 0.001). Furthermore, we found that thrombocytosis, chest pain and weight loss were significantly associated with poor prognosis, whereas epithelial type had a positive effect on survival. CONCLUSION These results suggest that OT and CP may be used as effective sclerosing agents for pleurodesis in the control of pleural effusions associated with MPM, without major side effects.
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Affiliation(s)
- A Senyiğit
- Department of Chest Diseases, Faculty of Medicine,University of Dicle, Diyarbakir, Turkey.
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Senyiğit A, Bayram H, Babayiğit C, Topçu F, Nazaroğlu H, Bilici A, Leblebici IH. Malignant pleural mesothelioma caused by environmental exposure to asbestos in the Southeast of Turkey: CT findings in 117 patients. Respiration 2001; 67:615-22. [PMID: 11124643 DOI: 10.1159/000056290] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Malignant pleural mesothelioma (MPM) is reported to be common in the southeast of Turkey, as a result of environmental asbestos exposure. The aim of this study was to evaluate the computed tomography (CT) features of MPM in patients with a history of asbestos exposure. METHODS The CT scans of 117 patients who had a diagnosis of MPM were retrospectively evaluated. Additionally, CT findings of histologic subtypes were compared. RESULTS The most common CT findings included pleural effusion (n = 104, 89%), pleural thickening (n = 96, 82%), mediastinal pleural involvement (n = 77, 66%) and interlobar fissural involvement (n = 62, 53%). Histologic subtype analysis was performed in 89 patients; of these, epithelial, sarcomatous and mixed types were identified in 46, 23 and 20 patients, respectively. An analysis of CT findings demonstrated that the involvement of mediastinal pleural (91%), interlobar fissure (87%) and lung parenchyma (48%) was significantly more frequent in sarcomatous type, as compared to epithelial (61% and p < 0.01; 35 and 4%, p < 0.0001, respectively) and mixed types (65% and p < 0.05; 10% and p < 0.0001; 10% and p < 0.01, respectively). Furthermore, there was a significant correlation between pericardial involvement and chest wall involvement (r = 0.42, p < 0.05) in sarcomatous type. Similarly, lymphadenopathy and parenchymal involvement (r = 0.23, p < 0.02), pericardial and chest wall involvement (r = 0.25, p < 0.01), chest wall and interlobar fissural involvement (r = 0.25, p < 0.01) were significantly correlated, when CT findings of all histologic subtypes were combined. CONCLUSIONS These results suggest that although CT findings of MPM vary, they may provide valuable clues to the diagnosis, at least in patients with a history of asbestos exposure. In addition, the presence of extensive lesions may suggest MPM of sarcomatous subtype.
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Affiliation(s)
- A Senyiğit
- Department of Chest Diseases, Faculty of Medicine, University of Dicle, Diyarbakir, Turkey.
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Bayram H, Sapsford RJ, Abdelaziz MM, Khair OA. Effect of ozone and nitrogen dioxide on the release of proinflammatory mediators from bronchial epithelial cells of nonatopic nonasthmatic subjects and atopic asthmatic patients in vitro. J Allergy Clin Immunol 2001; 107:287-94. [PMID: 11174195 DOI: 10.1067/mai.2001.111141] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Although studies have suggested that ozone (O3) and nitrogen dioxide (NO2) may play a role in the pathogenesis of asthma, the underlying mechanisms are not clear. OBJECTIVE We aimed to investigate the effects of O3 and NO2 on the release of IL-8, GM-CSF, RANTES, and soluble intercellular adhesion molecule 1 (sICAM-1) from human bronchial epithelial cells (HBECs) of nonatopic nonasthmatic subjects (nonasthmatic subjects) and atopic subjects with mild asthma (asthmatic subjects) in vitro. METHODS We cultured HBECs from bronchial biopsy specimens of nonasthmatic and asthmatic subjects; exposed these for 6 hours to air, 10 to 100 ppb O3, or 100 to 400 ppb NO2; and analyzed the release of IL-8, GM-CSF, RANTES, and sICAM-1 after 24 hours' incubation. RESULTS There was no significant difference between the constitutive release of IL-8, GM-CSF, and sICAM-1 from HBECs of asthmatic and nonasthmatic subjects. RANTES was detected only in HBECs derived from asthmatic subjects. Exposure of HBECs of asthmatic subjects to both 50 to 100 ppb O3 and 200 to 400 ppb NO2 significantly increased the release of IL-8, GM-CSF, RANTES, and sICAM-1 from these cells after 24 hours of incubation. However, 50 to 100 ppb O3 and 200 to 400 ppb NO2 led to a significant increase in release of only IL-8 and sICAM-1 from HBECs of nonasthmatic subjects after 24 hours' incubation. A comparison between the pollutant-induced release of mediators demonstrated that 100 ppb O3-induced release of GM-CSF and sICAM-1 was significantly greater in HBECs of asthmatic subjects (medians, 0.59 and 27.4 pg/microg cellular protein, respectively) than in HBECs of nonasthmatic subjects (medians, 0.27 and 14.4 pg/microg cellular protein, respectively; P < .02). CONCLUSION These results suggest that O3 and NO2 may modulate airway diseases, such as asthma, by increasing the release of inflammatory mediators from bronchial epithelial cells and that the cells of asthmatic subjects may be more susceptible to the adverse effects of these pollutants.
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Affiliation(s)
- H Bayram
- Department of Respiratory Medicine, School of Medicine, University of Dicle, Diyarbakir, Turkey
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Topçu F, Bayram H, Simşek M, Kaya K, Ozcan C, Işik R, Senyiğit A. High-resolution computed tomography in cases with environmental exposure to asbestos in Turkey. Respiration 2000; 67:139-45. [PMID: 10773784 DOI: 10.1159/000029501] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Although all parts of the lung can be affected as a consequence of asbestos exposure, most CT protocols tend to scan only the middle and lower parts of the thorax. The aim of this study was to investigate parenchymal and pleural lesions of persons exposed to environmental asbestos, using a high-resolution computed tomography (HRCT) protocol scanning the whole thorax. METHODS We analyzed the chest radiographs and HRCT scans of 26 patients who presented bilaterally with multiple pleural plaques related to environmental asbestos exposure. RESULTS Twenty-four cases (92%) had an abnormal HRCT suggestive of asbestosis. Apart from common HRCT changes related to asbestosis, we detected apical pleural thickening (APT) in 9 cases as well as a coarse honeycomb pattern adjacent to APT in 7 of these cases. Cavitary lesions due to pulmonary tuberculosis were observed on HRCT scans from 4 patients in total. Neither apical pulmonary fibrosis nor cavitary lesions were visible on chest radiographs. CONCLUSIONS We suggest that the HRCT protocol for examining asbestos-exposed individuals with pleural plaques on chest X-rays should include the whole thorax, since the asbestos-related pathologies may involve all parts of the lung.
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Affiliation(s)
- F Topçu
- Department of Chest Diseases, Faculty of Medicine, University of Dicle, Diyarbakir, Turkey
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Bayram H, Devalia JL, Khair OA, Abdelaziz MM, Sapsford RJ, Czarlewski W, Campbell AM, Bousquet J, Davies RJ. Effect of loratadine on nitrogen dioxide-induced changes in electrical resistance and release of inflammatory mediators from cultured human bronchial epithelial cells. J Allergy Clin Immunol 1999; 104:93-9. [PMID: 10400845 DOI: 10.1016/s0091-6749(99)70119-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Recent studies have demonstrated that some antihistamines can attenuate histamine-induced release of inflammatory mediators from bronchial epithelial cells. OBJECTIVE The purpose of study was to test the hypothesis that loratadine may influence pollution-induced inflammation of the airways by modulating epithelial membrane integrity and the synthesis and/or release of inflammatory mediators from airway epithelial cells. METHODS We have cultured human bronchial epithelial cell (HBEC) cultures from surgical explants and investigated the effect of loratadine on NO2-induced changes in both electrical resistance of HBEC cultures and release of IL-8, RANTES, and soluble intercellular adhesion molecule-1 (sICAM-1) from these cells after exposure for 6 hours to either air or 400 ppb NO2. RESULTS Exposure for 6 hours to NO2 significantly decreased the electrical resistance of HBEC cultures by 18.1% from baseline (P <.05). Incubation with 0.25 to 25 micromol/L loratadine did not alter the NO2-induced decrease in the electrical resistance of HBEC cultures. NO2 also significantly increased the release of IL-8 from a control value of 52.5 pg/microgram cellular protein to 81.9 pg/microgram cellular protein (P <.05), RANTES from a control value of 0.023 pg/microgram cellular protein to 0.062 pg/microgram cellular protein (P <.05), and sICAM-1 from a control value of 7.7 pg/microgram cellular protein to 16.3 pg/microgram cellular protein (P <.05). The NO2-induced release of all 3 mediators was significantly attenuated by incubation of HBECs with 25 micromol/L loratadine. Incubation with 2.5 micromol/L loratadine also significantly attenuated the NO2-induced release of RANTES and sICAM-1, but not IL-8. CONCLUSIONS These results suggest that loratadine has the potential to reduce airway inflammation by modulating the release of inflammatory cytokines from airway epithelial cells.
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Affiliation(s)
- H Bayram
- Academic Department of Respiratory Medicine, St Bartholomew's and the Royal London School of Medicine and Dentistry, The London Chest Hospital, London, United Kingdom
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Devalia JL, Bayram H, Abdelaziz MM, Sapsford RJ, Davies RJ. Differences between cytokine release from bronchial epithelial cells of asthmatic patients and non-asthmatic subjects: effect of exposure to diesel exhaust particles. Int Arch Allergy Immunol 1999; 118:437-9. [PMID: 10224468 DOI: 10.1159/000024157] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Recent evidence suggests that the airways of asthmatics are more susceptible to adverse effects of air pollutants than the airways of non-asthmatics, but the underlying mechanisms are not clear. METHODS We have cultured bronchial epithelial cells (HBEC) from biopsies of atopic mild asthmatic patients and non-atopic non-asthmatic subjects, and investigated constitutive and diesel exhaust particles (DEP)-induced release of several pro-inflammatory mediators. RESULTS HBEC of asthmatic patients constitutively released significantly greater amounts of IL-8, GM-CSF and sICAM-1 than HBEC of non-asthmatic subjects. RANTES was only released by HBEC of asthmatic patients. Incubation of the asthmatic cultures with 10 micrograms/ml DEP significantly increased the release of IL-8, GM-CSF and sICAM-1 after 24 h. In contrast, only the higher concentrations of 50-100 micrograms/ml DEP significantly increased the release of IL-8 and GM-CSF from HBEC of non-asthmatics. CONCLUSIONS These results suggest that the increased sensitivity of the airways of asthmatics to air pollutants such as DEP may, at least in part, be a consequence of greater constitutive and pollutant-induced release of specific pro-inflammatory mediators from their bronchial epithelial cells.
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Affiliation(s)
- J L Devalia
- Academic Department of Respiratory Medicine, St. Bartholomew's and The Royal London School of Medicine and Dentistry, London Chest Hospital, London, UK
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Bayram H, Devalia JL, Khair OA, Abdelaziz MM, Sapsford RJ, Sagai M, Davies RJ. Comparison of ciliary activity and inflammatory mediator release from bronchial epithelial cells of nonatopic nonasthmatic subjects and atopic asthmatic patients and the effect of diesel exhaust particles in vitro. J Allergy Clin Immunol 1998; 102:771-82. [PMID: 9819294 DOI: 10.1016/s0091-6749(98)70017-x] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Recent studies have suggested that asthmatic patients may be more susceptible to the adverse effects of air pollutants, including diesel exhaust particles (DEP). The underlying mechanisms, however, are not clear. METHODS We cultured bronchial epithelial cells from bronchial biopsy specimens of well-characterized groups of nonatopic, nonasthmatic individuals and atopic patients with mild asthma and compared the ciliary beat frequency (CBF) and release of IL-8, GM-CSF, regulated on activation, normal T-cell expressed and secreted (RANTES), and soluble intercellular adhesion molecule-1 (sICAM-1) from these cells both before and after exposure for 24 hours to 10 to 100 micrograms/mL DEP in vitro. RESULTS The baseline CBF was not found to be significantly different in the bronchial epithelial cell cultures of nonasthmatic and asthmatic individuals. Incubation with DEP significantly attenuated the CBF of both the nonasthmatic and asthmatic bronchial epithelial cell cultures at all concentrations of DEP investigated and were maximal (55.5% and 45.2%, respectively) after incubation with 100 micrograms/mL DEP. The bronchial epithelial cell cultures of asthmatic patients constitutively released significantly greater amounts of IL-8, GM-CSF, and sICAM-1 than bronchial epithelial cell cultures of nonasthmatic subjects. The cultures of only asthmatic patients additionally released RANTES. Incubation of the asthmatic cultures with 10 micrograms/mL DEP significantly increased the release of IL-8 (from 102.0 to 167.8 pg/micrograms cellular protein; P <.01), GM-CSF (from 0.43 to 1.87 pg/micrograms cellular protein; P <.01), and sICAM-1 (from 14.7 to 38.1 pg/micrograms cellular protein; P <.02) after 24 hours. Incubation with 50 to 100 micrograms/mL DEP, however, significantly decreased the release of IL-8 and RANTES from these cultures. In contrast, only the higher concentrations of 50 to 100 micrograms/mL DEP significantly increased release of IL-8 (from 37.9 to 71.5 pg/micrograms cellular protein; P <.05) and GM-CSF (from 0.06 to 0. 34 pg/micrograms cellular protein; P <.05) from the bronchial epithelial cells of nonasthmatic individuals. CONCLUSIONS These results suggest that bronchial epithelial cells of asthmatic subjects are different from bronchial epithelial cells of nonasthmatic subjects with regard to the amounts and types of proinflammatory mediators they can release and that the increased sensitivity of bronchial epithelial cells of asthmatic subjects to DEP may possibly result in exacerbation of their disease symptoms.
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Affiliation(s)
- H Bayram
- Academic Department of Respiratory Medicine, St Bartholomew's and the Royal London School of Medicine and Dentistry, The London Chest Hospital, London E2 9JX, UK
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Abdelaziz MM, Devalia JL, Khair OA, Bayram H, Prior AJ, Davies RJ. Effect of fexofenadine on eosinophil-induced changes in epithelial permeability and cytokine release from nasal epithelial cells of patients with seasonal allergic rhinitis. J Allergy Clin Immunol 1998; 101:410-20. [PMID: 9525460 DOI: 10.1016/s0091-6749(98)70256-8] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Recent studies have suggested that antihistamines, widely used in the treatment of symptoms of patients with allergic rhinitis, may also possess antiinflammatory properties. The mechanisms underlying this property, however, are not clearly understood. We have cultured epithelial cells from nasal biopsy specimens from patients with seasonal allergic rhinitis outside the pollen season and studied the effect of 0 to 10(-3) mol/L fexofenadine, the main active metabolite of terfenadine, on eosinophil-induced changes in electrical resistance (measure of permeability) and release of proinflammatory mediators from these cells. Additionally, we have studied the effect of this drug on eosinophil chemotaxis and adherence to endothelial cells induced by conditioned medium from these human nasal epithelial cell (HNEC) cultures. Incubation of HNEC in the presence of eosinophils treated with opsonized latex beads significantly decreased the electrical resistance of these cultures, an effect that was abrogated by treatment of the cultures with 10(-9) to 10(-3) mol/L fexofenadine. Similarly, incubation of HNEC in the presence of eosinophils treated with latex beads also significantly increased the basal release of the chemokine "regulated upon activation, normal T cell expressed and secreted" (RANTES) (from 96.0 to 613.0 fg/microg cellular protein; p < 0.05), IL-8 (from 42.0 to 198.5 pg/microg cellular protein; p < 0.05), granulocyte-macrophage colony-stimulating factor (GM-CSF) (from 0.54 to 3.4 pg/microg cellular protein; p < 0.05), and soluble intercellular adhesion molecule-1 (sICAM-1) (from 7.8 to 18.4 pg/microg cellular protein; p < 0.05) from HNEC. The eosinophil-induced release of IL-8, GM-CSF, and sICAM-1 from the HNEC was significantly attenuated by treatment with fexofenadine. Analysis of the effects of conditioned medium from HNEC demonstrated that this significantly increased both eosinophil chemotaxis and adherence to endothelial cells. Addition of 10(-6) to 10(-3) mol/L fexofenadine to the conditioned medium significantly attenuated eosinophil chemotaxis and adherence to endothelial cells. These results suggest that fexofenadine may reduce nasal inflammation by modulating the release of proinflammatory mediators and adhesion molecules from HNEC.
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Affiliation(s)
- M M Abdelaziz
- Academic Department of Respiratory Medicine, St. Bartholomew's and the Royal London School of Medicine and Dentistry, The London Chest Hospital, United Kingdom
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Bayram H, Devalia JL, Sapsford RJ, Ohtoshi T, Miyabara Y, Sagai M, Davies RJ. The effect of diesel exhaust particles on cell function and release of inflammatory mediators from human bronchial epithelial cells in vitro. Am J Respir Cell Mol Biol 1998; 18:441-8. [PMID: 9490663 DOI: 10.1165/ajrcmb.18.3.2882] [Citation(s) in RCA: 172] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Animal studies have reported that diesel exhaust particles (DEP), which constitute an important fraction of particulate air pollution, lead to inflammation and/or damage of the airways. To investigate the mechanisms underlying DEP-induced airway disease in humans, we have cultured human bronchial epithelial cells (HBEC) from surgically obtained bronchial explants and investigated the effects of purified DEP on the permeability and ciliary beat frequency (CBF) of HBEC, and on the release of inflammatory mediators from these cells. Exposure to 10-100 microg/ml DEP and a filtered solution of 50 microg/ml DEP significantly increased the electrical resistance of the cultures, reaching a maximum of 200% over baseline after 6 h incubation with 100 microg/ml DEP. In contrast, movement of 14C-labeled bovine serum albumin across cell cultures was not significantly altered by incubation of HBEC with DEP. Exposure to 50 microg/ml DEP, filtered DEP solution, and 100 migrog/ml DEP significantly attenuated the CBF of these cells by 51%, 33%, and 73%, respectively, from baseline after 24 h incubation. Similarly, 50 microg/ml DEP, filtered DEP solution, and 100 microg/ml DEP significantly increased the release of interleukin-8 from 12.9 pg/microg cellular protein to 41.6, 114.9, and 44.3 pg/microg cellular protein, respectively, after 24 h incubation. The release of granulocyte-macrophage colony stimulating factor (GM-CSF) and soluble intercellular adhesion molecule-1 (sICAM-1) was also significantly increased after exposure for 24 h to 50 microg/ml DEP (GM-CSF from 0.033 pg/microg cellular protein to 0.056 pg/mug cellular protein and sICAM-1 from 7.2 pg/microg cellular protein to 12.5 pg/microg cellular protein). These results suggest that exposure of HBEC to DEP may lead to adverse functional changes and release of proinflammatory mediators from these cells, and that these effects may influence the development of airway disease.
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Affiliation(s)
- H Bayram
- Academic Department of Respiratory Medicine, St. Bartholomew's and the Royal London School of Medicine and Dentistry, The London Chest Hospital, London, United Kingdom
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Babalioglu R, Yilmaz A, Caglar N, Özmen N, Bayram H, Kocabas Z, Kirsever E, Sidal B. R-186. Effects of HRT on climacteric symptoms and other related factors affecting these responses. Hum Reprod 1997. [DOI: 10.1093/humrep/12.suppl_2.316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Affiliation(s)
- C Rusznak
- Academic Department of Respiratory Medicine, St Bartholomew's School of Medicine and Dentistry, London Chest Hospital, UK
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Abdelaziz MM, Devalia JL, Khair OA, Rusznak C, Calderon M, Sapsford RJ, Bayram H, Davies RJ. The effect of nedocromil sodium on human airway epithelial cell-induced eosinophil chemotaxis and adherence to human endothelial cell in vitro. Eur Respir J 1997. [DOI: 10.1183/09031936.97.10040851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Abstract
Although some studies have shown that long-term treatment of asthmatics with nedocromil sodium can reduce airway hyperresponsiveness and improve symptoms and lung function, the mechanisms underlying its effects are not well understood. We have investigated the effect of nedocromil sodium on eosinophil chemotaxis, eosinophil adherence to human endothelial cells and release of soluble intercellular adhesion molecule-1 (sICAM-1) from endothelial cells, induced by conditioned medium collected from cultured human bronchial epithelial cells. Conditioned medium significantly increased eosinophil chemotaxis from a baseline median value of 2.1 (range 1.9-4.5) cells-high power field(-1) (HPF) to 10.5 (range 7.8-12.3) cells-HPF(-1) (p<0.05). Similarly, conditioned medium significantly increased eosinophil adherence to endothelial cells from a baseline value of 9 (range 8-12)% to 23 (range 21-30)% (p<0.05). Nedocromil sodium, at 10(-5) M concentration, significantly attenuated the eosinophil chemotaxis and adherence induced by conditioned medium. Conditioned medium also significantly increased the release of sICAM-1 from endothelial cells, from a baseline value of 11.5 (range 8.1-15.4) pg x microg(-1) protein to 67.6 (range 55.6-73.5) pg x microg(-1) protein (p<0.05). This was significantly attenuated by anti-tumour necrosis factor-alpha (TNF-alpha), anti-interleukin-1beta (IL-1beta) and 10(-5) M nedocromil sodium. These findings suggest that human bronchial epithelial cell-derived mediators may potentiate eosinophil activity, and that this can be modulated by nedocromil sodium, suggesting a possible mechanism underlying its anti-inflammatory effect.
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Abdelaziz MM, Devalia JL, Khair OA, Rusznak C, Calderon M, Sapsford RJ, Bayram H, Davies RJ. The effect of nedocromil sodium on human airway epithelial cell-induced eosinophil chemotaxis and adherence to human endothelial cell in vitro. Eur Respir J 1997; 10:851-7. [PMID: 9150324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Although some studies have shown that long-term treatment of asthmatics with nedocromil sodium can reduce airway hyperresponsiveness and improve symptoms and lung function, the mechanisms underlying its effects are not well understood. We have investigated the effect of nedocromil sodium on eosinophil chemotaxis, eosinophil adherence to human endothelial cells and release of soluble intercellular adhesion molecule-1 (sICAM-1) from endothelial cells, induced by conditioned medium collected from cultured human bronchial epithelial cells. Conditioned medium significantly increased eosinophil chemotaxis from a baseline median value of 2.1 (range 1.9-4.5) cells-high power field(-1) (HPF) to 10.5 (range 7.8-12.3) cells-HPF(-1) (p<0.05). Similarly, conditioned medium significantly increased eosinophil adherence to endothelial cells from a baseline value of 9 (range 8-12)% to 23 (range 21-30)% (p<0.05). Nedocromil sodium, at 10(-5) M concentration, significantly attenuated the eosinophil chemotaxis and adherence induced by conditioned medium. Conditioned medium also significantly increased the release of sICAM-1 from endothelial cells, from a baseline value of 11.5 (range 8.1-15.4) pg x microg(-1) protein to 67.6 (range 55.6-73.5) pg x microg(-1) protein (p<0.05). This was significantly attenuated by anti-tumour necrosis factor-alpha (TNF-alpha), anti-interleukin-1beta (IL-1beta) and 10(-5) M nedocromil sodium. These findings suggest that human bronchial epithelial cell-derived mediators may potentiate eosinophil activity, and that this can be modulated by nedocromil sodium, suggesting a possible mechanism underlying its anti-inflammatory effect.
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Affiliation(s)
- M M Abdelaziz
- Academic Dept of Respiratory Medicine, St Bartholomew's and the Royal London School of Medicine and Dentistry, The London Chest Hospital, UK
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Devalia JL, Bayram H, Rusznak C, Calderón M, Sapsford RJ, Abdelaziz MA, Wang J, Davies RJ. Mechanisms of pollution-induced airway disease: in vitro studies in the upper and lower airways. Allergy 1997; 52:45-51; discussion 57-8. [PMID: 9208059 DOI: 10.1111/j.1398-9995.1997.tb04870.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Evidence from both epidemiological and laboratory-based studies suggests that increased exposure to liquid petroleum and gas-derived air pollutants [nitrogen dioxide (NO2), ozone, and respirable particulate matter] may play a role in the clinical manifestation of both allergic and non-allergic airway disease. The mechanisms and cell types involved in pollutant-mediated effects in the airways, however, are not clear. In vitro studies have suggested that human fibroblasts, B-lymphocytes, alveolar macrophages, and epithelial cells/cell lines may be involved. Studies of fibroblasts and macrophages have demonstrated that exposure to ozone results in decreased cell viability and increased release of pro-inflammatory mediators from macrophages. Similarly, studies of B-lymphocytes have demonstrated that exposure to diesel exhaust particles (DEP) enhances the synthesis of immunoglobulin E by these cells. The airway epithelial cells have received the greatest attention in mechanistic studies of air pollution-induced airway disease and suggest that these cells are likely to play a pivotal role in the pathogenesis of airways disease. Various studies have demonstrated that exposure of nasal or bronchial epithelial cells to NO2, ozone, and DEP results in significant synthesis and release of pro-inflammatory mediators, including eicosanoids, cytokines, and adhesion molecules. Additionally, evidence suggests that epithelial cells of atopic individuals release significantly greater amounts of cytokines such as granulocyte-macrophage colony stimulating factor (GM-CSF), interleukin-6 (IL-6), IL-8, and regulated on activation, normal T-cell expressed and secreted (RANTES), on exposure to NO2 and ozone. Studies investigating the biological relevance of epithelial cell-derived pro-inflammatory mediators have shown that these enhance eosinophil chemotaxis and eosinophil adherence to endothelial cells, suggesting that pollution-induced inflammation of the airways is likely to be influenced by modulation of epithelial synthesis and release of these mediators.
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Affiliation(s)
- J L Devalia
- Academic Department of Respiratory Medicine, St Bartholomew's and the Royal-London School of Medicine and Dentistry, London Chest Hospital, UK
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Abstract
Fibular dimelia with mirror foot is a rare anomaly that may be associated with additional anomalies such as ulnar dimelia, facial abnormalities and sacrococcygeal teratoma. We report a female child with unilateral tibial aplasia, ipsilateral duplication of fibula and calcaneus, and mirror polydactyly of the foot without associated abnormalities.
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Affiliation(s)
- H Bayram
- Department of Orthopaedics & Traumatology, Faculty of Medicine, University of Cukurova, Adana, Turkey
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