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Pignatti P, Visca D, Zappa M, Zampogna E, Saderi L, Sotgiu G, Centis R, Migliori GB, Spanevello A. Monitoring COPD patients: systemic and bronchial eosinophilic inflammation in a 2-year follow-up. BMC Pulm Med 2024; 24:247. [PMID: 38764008 PMCID: PMC11102620 DOI: 10.1186/s12890-024-03062-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Accepted: 05/13/2024] [Indexed: 05/21/2024] Open
Abstract
BACKGROUND High blood eosinophils seem to predict exacerbations and response to inhaled corticosteroids (ICS) treatment in patients with chronic obstructive pulmonary disease (COPD). The aim of our study was to prospectively evaluate for 2 years, blood and sputum eosinophils in COPD patients treated with bronchodilators only at recruitment. METHODS COPD patients in stable condition treated with bronchodilators only underwent monitoring of lung function, blood and sputum eosinophils, exacerbations and comorbidities every 6 months for 2 years. ICS was added during follow-up when symptoms worsened. RESULTS 63 COPD patients were enrolled: 53 were followed for 1 year, 41 for 2 years, 10 dropped-out. After 2 years, ICS was added in 12/41 patients (29%) without any statistically significant difference at time points considered. Blood and sputum eosinophils did not change during follow-up. Only FEV1/FVC at T0 was predictive of ICS addition during the 2 year-follow-up (OR:0.91; 95% CI: 0.83-0.99, p = 0.03). ICS addition did not impact on delta (T24-T0) FEV1, blood and sputum eosinophils and exacerbations. After 2 years, patients who received ICS had higher blood eosinophils than those in bronchodilator therapy (p = 0.042). Patients with history of ischemic heart disease increased blood eosinophils after 2 years [p = 0.03 for both percentage and counts]. CONCLUSIONS Blood and sputum eosinophils remained stable during the 2 year follow-up and were not associated with worsened symptoms or exacerbations. Almost 30% of mild/moderate COPD patients in bronchodilator therapy at enrollment, received ICS for worsened symptoms in a 2 year-follow-up and only FEV1/FVC at T0 seems to predict this addition. History of ischemic heart disease seems to be associated with a progressive increase of blood eosinophils.
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Affiliation(s)
- Patrizia Pignatti
- Allergy and Immunology Unit, Istituti Clinici Scientifici Maugeri, IRCCS, Via S.Maugeri 10, Pavia, 27100, Italy.
| | - Dina Visca
- Division of Pulmonary Rehabilitation, Istituti Clinici Scientifici Maugeri, IRCCS, Tradate, Italy
- Department of Medicine and Surgery, Respiratory Diseases, University of Insubria, Varese- Como, Italy
| | - Martina Zappa
- Department of Medicine and Surgery, Respiratory Diseases, University of Insubria, Varese- Como, Italy
| | - Elisabetta Zampogna
- Division of Pulmonary Rehabilitation, Istituti Clinici Scientifici Maugeri, IRCCS, Tradate, Italy
| | - Laura Saderi
- Clinical Epidemiology and Medical Statistics Unit, Department of Biomedical Medicine, Surgery and Pharmacy Sciences, University of Sassari, Sassari, Italy
| | - Giovanni Sotgiu
- Clinical Epidemiology and Medical Statistics Unit, Department of Biomedical Medicine, Surgery and Pharmacy Sciences, University of Sassari, Sassari, Italy
| | - Rosella Centis
- Respiratory Diseases Clinical Epidemiology Unit, Istituti Clinici Scientifici Maugeri, IRCCS, Tradate, Italy
| | - Giovanni Battista Migliori
- Respiratory Diseases Clinical Epidemiology Unit, Istituti Clinici Scientifici Maugeri, IRCCS, Tradate, Italy
| | - Antonio Spanevello
- Division of Pulmonary Rehabilitation, Istituti Clinici Scientifici Maugeri, IRCCS, Tradate, Italy
- Department of Medicine and Surgery, Respiratory Diseases, University of Insubria, Varese- Como, Italy
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2
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Athanazio RA, Bernal Villada L, Avdeev SN, Wang HC, Ramírez-Venegas A, Sivori M, Dreyse J, Pacheco M, Man SK, Noriega-Aguirre L, Farouk H. Rate of severe exacerbations, healthcare resource utilisation and clinical outcomes in patients with COPD in low-income and middle-income countries: results from the EXACOS International Study. BMJ Open Respir Res 2024; 11:e002101. [PMID: 38637115 PMCID: PMC11029392 DOI: 10.1136/bmjresp-2023-002101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 02/16/2024] [Indexed: 04/20/2024] Open
Abstract
INTRODUCTION The EXAcerbations of Chronic obstructive lung disease (COPD) and their OutcomeS (EXACOS) International Study aimed to quantify the rate of severe exacerbations and examine healthcare resource utilisation (HCRU) and clinical outcomes in patients with COPD from low-income and middle-income countries. METHODS EXACOS International was an observational, cross-sectional study with retrospective data collection from medical records for a period of up to 5 years. Data were collected from 12 countries: Argentina, Brazil, Chile, Colombia, Costa Rica, Dominican Republic, Guatemala, Hong Kong, Mexico, Panama, Russia and Taiwan. The study population comprised patients ≥40 years of age with COPD. Outcomes/variables included the prevalence of severe exacerbations, the annual rate of severe exacerbations and time between severe exacerbations; change in lung function over time (measured by the forced expiratory volume in 1 s (FEV1)); peripheral blood eosinophil counts (BECs) and the prevalence of comorbidities; treatment patterns; and HCRU. RESULTS In total, 1702 patients were included in the study. The study population had a mean age of 69.7 years, with 69.4% males, and a mean body mass index of 26.4 kg/m2. The mean annual prevalence of severe exacerbations was 20.1%, and 48.4% of patients experienced ≥1 severe exacerbation during the 5-year study period. As the number of severe exacerbations increased, the interval between successive exacerbations decreased. A statistically significant decrease in mean (SD) FEV1 from baseline to post-baseline was observed in patients with ≥1 severe exacerbation (1.23 (0.51) to 1.13 (0.52) L; p=0.0000). Mean BEC was 0.198 x109 cells/L, with 64.7% of patients having a BEC ≥0.1 x109 cells/L and 21.3% having a BEC ≥0.3 x109 cells/L. The most common comorbidity was hypertension (58.3%). An increasing number of severe exacerbations per year was associated with greater HCRU. DISCUSSION The findings presented here indicate that effective treatment strategies to prevent severe exacerbations in patients with COPD remain a significant unmet need in low-income and middle-income countries.
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Affiliation(s)
- Rodrigo Abensur Athanazio
- Pulmonology Division, Heart Institute-InCor-Clinical Hospital, Faculty of Medicine, Universidade de São Paulo, São Paulo, Brazil
| | | | - Sergey N Avdeev
- Department of Pulmonology, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
| | - Hao-Chien Wang
- Department of Internal Medicine, National Taiwan University Hospital and College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Alejandra Ramírez-Venegas
- Tobacco Smoking and COPD Research Department, Instituto Nacional de Enfermedades Respiratorias Ismael Cosio Villegas, Mexico City, Mexico
| | - Martín Sivori
- Pneumology Unit, Dr J M Ramos Mejía Pulmonology University Center, Faculty of Medicine, University of Buenos Aires, Buenos Aires, Argentina
| | - Jorge Dreyse
- Department of Internal Medicine and Critical Care Center, Clínica Las Condes and School of Medicine Universidad Finis Terrae, Santiago, Chile
| | - Manuel Pacheco
- Internal Medicine Research Group, Universidad Tecnológica de Pereira, Pereira, Colombia
- Fundación Universitaria Visión de las Américas y Respiremos Unidad de Neumología, Pereira, Colombia
| | - Sin Kit Man
- Department of Medicine and Geriatrics, Department of Medicine and Geriatrics, Tuen Mun Hospital, Hong Kong Special Administrative Region (HKSAR), Tuen Mun, People's Republic of China
| | - Lorena Noriega-Aguirre
- Center for Diagnosis and Treatment of Respiratory Diseases (CEDITER), Panama City, Panama
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3
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Liu H, Xie Y, Huang Y, Luo K, Gu Y, Zhang H, Xu Y, Chen X. The association between blood eosinophils and clinical outcome of acute exacerbations of chronic obstructive pulmonary disease: A systematic review and meta-analysis. Respir Med 2024; 222:107501. [PMID: 38104787 DOI: 10.1016/j.rmed.2023.107501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 11/30/2023] [Accepted: 12/13/2023] [Indexed: 12/19/2023]
Abstract
OBJECTIVES Studies have shown an association between eosinophilia and clinical outcomes in acute exacerbation of chronic obstructive pulmonary disease (AECOPD). However, contradictory findings exist. Our study aims to systematically evaluate the association between elevated peripheral blood eosinophils and clinical outcome of patients with AECOPD. METHODS An electronic search was conducted for relevant studies published from database inception to February 28, 2023, on PubMed, EMBASE, Cochrane Library, and Web of Science. The analysis covered studies on the correlation between EOS AECOPD and mortality, hospital stay duration, readmission and hospitalization rates, and invasive mechanical ventilation. Where applicable, relative risk (RR) and weighted mean difference (WMD) were extracted, pooled, and assessed using meta-analysis. Sensitivity analysis was performed to explore the source of heterogeneity. RESULTS Fifteen high-quality studies including 14 cohort studies and one case-control study were included in the meta-analysis. Compared with non-eosinophilic AECOPD patients, those with eosinophilic AECOPD had a lower risk of mortality (RR = 0.65, 95 % confidence interval [CI] 0.54, 0.77, P < 0.001), shorter length of hospital stay (WMD = -1.56, 95%CI -2.16, -0.96, P < 0.001), and higher readmission rate (RR = 1.07, 95%CI 1.01,1.13, P = 0.029). No difference was found concerning the rate of hospitalization and invasive mechanical ventilation between the two groups. CONCLUSION Individuals diagnosed with eosinophilic AECOPD had a reduced mortality rate, a truncated period of hospitalization, and an insubstantial increase in the probability of readmission relative to their non-eosinophilic AECOPD counterparts. The level of eosinophils in blood has been shown to serve as a potential predictive biomarker for AECOPD patients.
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Affiliation(s)
- Hai Liu
- Department of Nursing, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang, China
| | - Yongpeng Xie
- Department of Emergency and Critical Care Medicine, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang, China
| | - Yuanyuan Huang
- Department of Emergency Medicine, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang, China
| | - Kangle Luo
- Department of Emergency Medicine, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang, China
| | - Yongli Gu
- Department of Pharmacy, Lianyungang Clinical College of Nanjing Medical University, China
| | - Huan Zhang
- Department of Humanities and Management, Kangda College of Nanjing Medical University, Lianyungang, China
| | - Yi Xu
- Department of Pharmacy, Lianyungang Clinical College of Nanjing Medical University, China.
| | - Xuefeng Chen
- Department of Emergency and Critical Care Medicine, The Affiliated Lianyungang Hospital of Xuzhou Medical University, Lianyungang, China.
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Pleasants RA, Donohue JF. Current Perspectives of Pharmacotherapies for COPD. Respir Care 2023; 68:927-938. [PMID: 37353337 PMCID: PMC10289617 DOI: 10.4187/respcare.10952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/25/2023]
Abstract
Pharmacotherapies and avoidance of environmental/inhaled toxins are core to managing COPD. Compared to the drugs available 50 years ago, there has been substantial progress with COPD pharmacotherapies, but gaps in adherence and inhaler use persist. Personalizing inhaled pharmacotherapies is now possible with digital technologies by objectively documenting adherence and guiding inhaler technique. Another means to improve existing pharmacotherapies is through phenotyping and biomarkers. This is especially important considering the heterogeneity of the disease COPD. Blood eosinophils are now a recommended biomarker to guide use of inhaled corticosteroids and biologics in COPD. On the near horizon, we will see new inhaled medications as dual phosphodiesterase inhibitors, drugs to treat basic protein abnormalities as in alpha-1 antitrypsin deficiency that could have remarkable benefits, and biologic drugs targeting specific cell/mediator types in the COPD population. Characterization of COPD phenotypes, as asthma/COPD overlap and comorbid heart disease are vital to understand how to optimize pharmacotherapies. Importantly, we must determine how to optimize current medications; otherwise, we will repeat the same mistakes with new medications. But as we know so well, as we peel one layer of complexity, we encounter many more questions, all the while dedicated to limiting the burden of COPD.
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Affiliation(s)
- Roy A Pleasants
- Division of Pulmonary Diseases and Critical Care Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
| | - James F Donohue
- Division of Pulmonary Diseases and Critical Care Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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5
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Tamondong-Lachica DR, Skolnik N, Hurst JR, Marchetti N, Rabe APJ, Montes de Oca M, Celli BR. GOLD 2023 Update: Implications for Clinical Practice. Int J Chron Obstruct Pulmon Dis 2023; 18:745-754. [PMID: 37180752 PMCID: PMC10168197 DOI: 10.2147/copd.s404690] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 04/06/2023] [Indexed: 05/16/2023] Open
Abstract
In 2022, over 3 million people died of chronic obstructive pulmonary disease (COPD) and the global burden of the disease is expected to increase over the coming decades. Recommendations for the treatment and management of patients with COPD are published by the Global Initiative for Chronic Obstructive Lung Disease, and updated annually with scientific evidence-based recommendations. The 2023 updates, published in November 2022, contain key changes to recommendations for diagnosis and treatment of COPD that are anticipated to have a significant impact on clinical practice for patients with COPD. Updates to how COPD is defined and diagnosed, including the expansion of contributing factors beyond tobacco use, have the potential to lead to the diagnosis of more patients and to allow for the implementation of early interventions for patients during early stages of the disease. Simplification of the treatment algorithms, and placement of triple therapy within these algorithms, will support clinicians in providing appropriate, timely treatment for patients with COPD with a focus on reducing the risk of future exacerbations. Finally, recognition of mortality reduction as a treatment goal in COPD supports an increase in the use of triple therapy, the only pharmacological intervention that has been demonstrated to improve survival for patients with COPD. Although further guidance and clarification are needed in some areas, such as use of blood eosinophil counts in guiding treatment decisions and implementation of treatment protocols following hospitalizations, recent updates to the GOLD recommendations will support clinicians in addressing current gaps in patient care. Clinicians should utilize these recommendations to drive the early diagnosis of patients with COPD, the identification of exacerbations, and the selection of appropriate, timely treatments for patients.
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Affiliation(s)
| | - Neil Skolnik
- Sidney Kimmel Medical College, Thomas Jefferson University, Abington, Philadelphia, PA, USA
| | - John R Hurst
- UCL Respiratory, University College London, London, UK
| | - Nathaniel Marchetti
- Department of Thoracic Medicine and Surgery, Temple University, Philadelphia, PA, USA
| | - Adrian Paul J Rabe
- Department of Primary Care and Public Health, Imperial College London, London, UK
- Biopharmaceuticals Medical, AstraZeneca, Cambridge, UK
| | - Maria Montes de Oca
- Pulmonary and Thoracic Surgery Department, Universidad Central de Venezuela, School of Medicine, Centro Médico de Caracas, Caracas, Venezuela
| | - Bartolome R Celli
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
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6
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Abe Y, Suzuki M, Kimura H, Shimizu K, Takei N, Oguma A, Matsumoto-Sasaki M, Goudarzi H, Makita H, Nishimura M, Konno S. Blood eosinophil count variability in chronic obstructive pulmonary disease and severe asthma. Allergol Int 2022:S1323-8930(22)00139-3. [PMID: 36586746 DOI: 10.1016/j.alit.2022.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 11/10/2022] [Accepted: 11/30/2022] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Blood eosinophils are essential biomarkers that vary substantially over time in patients with COPD and asthma. However, no study has identified the changes and effects in the changes of the blood eosinophil counts over time in both diseases. This study aimed to demonstrate blood eosinophil variability in patients with COPD and severe asthma based on these backgrounds. METHODS A total of 172 patients with COPD from the Hokkaido COPD cohort study and 96 patients with severe asthma from the Hokkaido Severe Asthma Cohort Study, whose blood eosinophil counts were measured annually over a 3-year period, were analyzed. The factors contributing to consistently high or low blood eosinophil counts were examined in each cohort. The stability of the eosinophil classification (<150, 150-299, ≥300 cells/μL) was compared based on the number of asthma-like features in patients with COPD and the smoking status in patients with severe asthma. RESULTS Among all the patients, the most stable range of baseline blood eosinophil counts differed between the two diseases, with <150 cells/μL in COPD and ≥300 cells/μL in severe asthma. In COPD, the number of asthma-like features (bronchodilator reversibility, blood eosinophilia, and atopy) affects the blood eosinophil count variation patterns. In severe asthma, smoking status did not affect the blood eosinophil count variation patterns. CONCLUSIONS We identified variations in the blood eosinophil counts and their contributing factors in patients with COPD and severe asthma.
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Affiliation(s)
- Yuki Abe
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Masaru Suzuki
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan.
| | - Hirokazu Kimura
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Kaoruko Shimizu
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Nozomu Takei
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Akira Oguma
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | | | - Houman Goudarzi
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Hironi Makita
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan; Hokkaido Medical Research Institute for Respiratory Diseases, Sapporo, Japan
| | - Masaharu Nishimura
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan; Hokkaido Medical Research Institute for Respiratory Diseases, Sapporo, Japan
| | - Satoshi Konno
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan
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Antus B, Barta I. Blood Eosinophils and Exhaled Nitric Oxide: Surrogate Biomarkers of Airway Eosinophilia in Stable COPD and Exacerbation. Biomedicines 2022; 10:biomedicines10092128. [PMID: 36140229 PMCID: PMC9496115 DOI: 10.3390/biomedicines10092128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/28/2022] [Accepted: 08/29/2022] [Indexed: 11/16/2022] Open
Abstract
In recent years, tremendous efforts have been devoted to characterizing the inflammatory processes in chronic obstructive pulmonary disease (COPD) in order to provide more personalized treatment for COPD patients. While it has proved difficult to identify COPD-specific inflammatory pathways, the distinction between eosinophilic and non-eosinophilic airway inflammation has gained clinical relevance. Evidence has shown that sputum eosinophil counts are increased in a subset of COPD patients and that these patients are more responsive to oral or inhaled corticosteroid therapy. Due to feasibility issues associated with sputum cell profiling in daily clinical practice, peripheral blood eosinophil counts and fractional exhaled nitric oxide levels have been evaluated as surrogate biomarkers for assessing the extent of airway eosinophilia in COPD patients, both in stable disease and acute exacerbations. The diagnostic value of these markers is not equivalent and depends heavily on the patient’s condition at the time of sample collection. Additionally, the sensitivity and specificity of these tests may be influenced by the patient’s maintenance treatment. Overall, eosinophilic COPD may represent a distinct disease phenotype that needs to be further investigated in terms of prognosis and treatment outcomes.
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Affiliation(s)
- Balazs Antus
- Department of Pathophysiology, National Koranyi Institute of Pulmology, Koranyi Frigyes Ut 1, 1121 Budapest, Hungary
- Department of Pulmonology, National Koranyi Institute of Pulmology, Koranyi Frigyes Ut 1, 1121 Budapest, Hungary
- Correspondence: ; Tel.: +36-1-391-3309
| | - Imre Barta
- Department of Pathophysiology, National Koranyi Institute of Pulmology, Koranyi Frigyes Ut 1, 1121 Budapest, Hungary
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8
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Harries TH, Gilworth G, Corrigan CJ, Murphy P, Hart N, Thomas M, White PT. Withdrawal of inhaled corticosteroids from patients with COPD with mild or moderate airflow limitation in primary care: a feasibility randomised trial. BMJ Open Respir Res 2022; 9:9/1/e001311. [PMID: 36041773 PMCID: PMC9438092 DOI: 10.1136/bmjresp-2022-001311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 08/01/2022] [Indexed: 11/17/2022] Open
Abstract
Background Inhaled corticosteroids (ICS) are frequently prescribed outside guidelines to patients with chronic obstructive pulmonary disease (COPD) with mild/moderate airflow limitation and low exacerbation risk. This primary care trial explored the feasibility of identifying patients with mild/moderate COPD taking ICS, and the acceptability of ICS withdrawal. Methods Open feasibility trial. Outcome measures included prevalence of suitable participants, feasibility of their identification, their willingness-to-accept open randomisation to ICS withdrawal or continuation over 6 months follow-up. Results 392 (13%) of 2967 patients with COPD from 20 practices (209 618 population) identified as eligible for ICS withdrawal by electronic search algorithm. After individual patient record review, 243 (62%) were excluded because of: severe airflow limitation (65, 17%); one or more severe or two or more moderate COPD exacerbations in the previous year (86, 22%); asthma (15, 4%); and severe comorbidities (77, 20%). After exclusion, 149 patients with COPD were invited to participate and 61 agreed to randomisation. At clinical assessment, 10 patients exhibited undocumented airflow reversibility (forced expiratory volume in 1 s (FEV1) reversibility >12% and >200 mL); 2 had suffered two or more undocumented, moderate exacerbations in the previous year; 7 had severe airflow limitation; and 2 had normal spirometry. Finally, 40 were randomised. One patient died and one was lost to follow-up. 18 (45%) of the 38 (10 withdrawal and 8 usual care) exhibited previously undocumented FEV1 variability suggestive of asthma, supported in the withdrawal group by significant associations with elevated fractional exhaled nitric oxide (p=0.04), elevated symptom score (p=0.04), poorer quality of life (p=0.04) and atopic status (p=0.01). Conclusions Identifying primary care patients with mild/moderate COPD suitable for ICS withdrawal is feasible but requires real-time verification because of unreliable recording of exacerbations and lung function. Suitable patients accepted randomisation to ICS withdrawal or continuation for the purposes of future studies. Follow-up compliance was high. Nearly 50% of participants with a diagnosis of mild/moderate COPD demonstrated previously undocumented FEV1 variability during follow-up, mandating monitoring for at least 6 months following withdrawal to exclude undiagnosed asthma.
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Affiliation(s)
- Timothy H Harries
- School of Population Health and Environmental Sciences, King's College London, London, UK
| | - Gill Gilworth
- School of Population Health and Environmental Sciences, King's College London, London, UK
| | | | - Patrick Murphy
- Lane Fox Respiratory Unit, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Nicholas Hart
- Lane Fox Respiratory Unit, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Mike Thomas
- PCPS, University of Southampton, Southampton, UK
| | - Patrick T White
- School of Population Health and Environmental Sciences, King's College London, London, UK
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Factors Influencing the Stability of Blood Eosinophils Counts in Chronic Obstructive Pulmonary Disease Patients. Can Respir J 2022; 2022:8369521. [PMID: 35387448 PMCID: PMC8977339 DOI: 10.1155/2022/8369521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 03/02/2022] [Accepted: 03/07/2022] [Indexed: 11/17/2022] Open
Abstract
Blood eosinophil (EOS) has recently been recognized as a biomarker for chronic obstructive pulmonary disease (COPD) patients. However, few studies have concentrated on the stability of blood eosinophil counts (BEC), and those studies have produced varying results. With further research, we have found minor drawbacks and vulnerabilities that lead to the variability of the results. This paper enumerates several areas of relevant research with varying conclusions to further investigate the stability of BEC in COPD patients.
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10
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Loewenthal L, Menzies-Gow A. FeNO in Asthma. Semin Respir Crit Care Med 2022; 43:635-645. [DOI: 10.1055/s-0042-1743290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractAsthma is a common disease affecting 350 million people worldwide, which is characterized by airways inflammation and hyperreactivity. Historically diagnosis and treatment have been mainly based on symptoms, which have the potential to result in misdiagnosis and inappropriate treatment. Nitric oxide (NO) is exhaled in human breath and is a marker of airways inflammation. Levels of NO are increased in the exhaled breath of patients with type 2 asthma and fractional exhaled nitric oxide (FeNO) provides an objective biomarker of airway inflammation. FeNO testing is an accessible, noninvasive, and easy-to-use test. Cut-off values have been established by the American Thoracic Society (ATS), the Global Initiative for Asthma (GINA), and the National Institute for Health and Care Excellence (NICE) but vary between guidance. FeNO levels have been shown to be predictive of blood and sputum eosinophil levels but should not be used in isolation and current guidance emphasizes the importance of incorporating clinical symptoms and testing when utilizing FeNO results. The inclusion of FeNO testing can increase diagnostic accuracy of asthma, while high levels in asthmatic patients can help predict response to inhaled corticosteroids (ICS) and suppression of levels with ICS to monitor adherence. FeNO levels are also a predictor of asthma risk with increased exacerbation rates and accelerated decline in lung function associated with high levels as well as having an emerging role in predicting response to some biologic therapies in severe asthma. FeNO testing is cost-effective and has been shown, when combined with clinical assessment, to improve asthma management.
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Affiliation(s)
- Lola Loewenthal
- Department of Respiratory Medicine, Royal Brompton and Harefield Hospitals, London, United Kingdom
- National Heart and Lung Institute, Imperial College London, United Kingdom
| | - Andrew Menzies-Gow
- Department of Respiratory Medicine, Royal Brompton and Harefield Hospitals, London, United Kingdom
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11
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Ashdown HF, Smith M, McFadden E, Pavord ID, Butler CC, Bafadhel M. Blood eosinophils to guide inhaled maintenance therapy in a primary care COPD population. ERJ Open Res 2021; 8:00606-2021. [PMID: 35141324 PMCID: PMC8819252 DOI: 10.1183/23120541.00606-2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 11/08/2021] [Indexed: 12/27/2022] Open
Abstract
Blood eosinophils are a potentially useful biomarker for guiding inhaled corticosteroid (ICS) treatment decisions in COPD. We investigated whether existing blood eosinophil counts predict benefit from initiation of ICS compared to bronchodilator therapy.We used routinely collected data from UK primary care in the Clinical Practice Research Datalink. Participants were aged ≥40 years with COPD, were ICS-naïve and starting a new inhaled maintenance medication (intervention group: ICS; comparator group: long-acting bronchodilator, non-ICS). Primary outcome was time to first exacerbation, compared between ICS and non-ICS groups, stratified by blood eosinophils (“high” ≥150 cells·µL−1 and “low” <150 cells·µL−1).Out of 9475 eligible patients, 53.9% initiated ICS and 46.1% non-ICS treatment with no difference in eosinophils between treatment groups (p=0.71). Exacerbation risk was higher in patients prescribed ICS than those prescribed non-ICS treatment, but with a lower risk in those with high eosinophils (hazard ratio (HR) 1.04, 95% CI 0.98–1.10) than low eosinophils (HR 1.19, 95% CI 1.09–1.31) (p-value for interaction 0.01). Risk of pneumonia hospitalisation with ICS was greatest in those with low eosinophils (HR 1.26, 95% CI 1.05–1.50; p-value for interaction 0.04). Results were similar whether the most recent blood eosinophil count or the mean of blood eosinophil counts was used.In a primary care population, the most recent blood eosinophil count could be used to guide initiation of ICS in COPD patients. We suggest that ICS should be considered in those with higher eosinophils and avoided in those with lower eosinophils (<150 cells·µL−1).
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Chipps BE, Jarjour N, Calhoun WJ, Iqbal A, Haselkorn T, Yang M, Brumm J, Corren J, Holweg CTJ, Bafadhel M. A Comprehensive Analysis of the Stability of Blood Eosinophil Levels. Ann Am Thorac Soc 2021; 18:1978-1987. [PMID: 33891831 PMCID: PMC8641810 DOI: 10.1513/annalsats.202010-1249oc] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 04/23/2021] [Indexed: 01/27/2023] Open
Abstract
Rationale: Blood eosinophil counts are used to inform diagnosis/management of eosinophilic asthma. Objectives: Examine blood eosinophil variability and identify factors affecting eosinophil levels to inform clinical interpretation. Methods:Post hoc analysis to understand eosinophil variability using data from four randomized controlled asthma trials. We examined 1) influence of intrinsic/extrinsic factors (comorbidities, medication, and patient history) using baseline data (n = 2,612); 2) monthly variation using placebo-treated patient data (n = 713); 3) stability of eosinophil classification (<150, 150-299, and ⩾300 cells/μl) in placebo-treated patients with monthly measurements over a 1-year period (n = 751); and 4) impact of technical factors (laboratory-to-laboratory differences and time from collection to analysis). Results: Of intrinsic/extrinsic factors examined, nasal polyps increased eosinophil levels by 38%, whereas current smoking decreased levels by 23%. Substantial seasonal differences in eosinophil counts were observed, with differences of ∼20% between July and January. Eosinophil levels between 150 and 299 cells/μl were least stable, with 44% of patients remaining in the same classification for seven of 10 measurements versus 59% and 66% of patients in the <150 and ⩾300 cells/μl subgroups, respectively. Measurements at different laboratories showed high association (Spearman's correlation coefficient, R = 0.89); however, eosinophil counts were reduced, with longer time from collection to analysis, and variability increased with increasing eosinophil counts. Conclusions: Several intrinsic, extrinsic, and technical factors may influence, and should be considered in, clinical interpretation of eosinophil counts. Additionally, a single measurement may not be sufficient when using eosinophil counts for diagnosis/management of eosinophilic asthma.
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Affiliation(s)
- Bradley E. Chipps
- Capital Allergy & Respiratory Disease Center, Sacramento, California
| | | | - William J. Calhoun
- Division of Allergy and Clinical Immunology, University of Texas Medical Branch, Galveston, Texas
| | - Ahmar Iqbal
- Genentech, Inc., South San Francisco, California
| | | | - Ming Yang
- Genentech, Inc., South San Francisco, California
| | - Jochen Brumm
- Genentech, Inc., South San Francisco, California
| | - Jonathan Corren
- David Geffen School of Medicine at UCLA, Los Angeles, California; and
| | | | - Mona Bafadhel
- Respiratory Medicine Unit, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
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13
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Morasert T, Jantarapootirat M, Phinyo P, Patumanond J. Prognostic indicators for in-hospital mortality in COPD with acute exacerbation in Thailand: a retrospective cohort study. BMJ Open Respir Res 2021; 7:7/1/e000488. [PMID: 32467292 PMCID: PMC7259855 DOI: 10.1136/bmjresp-2019-000488] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 12/29/2022] Open
Abstract
Background Acute exacerbation of chronic obstructive pulmonary disease (AECOPD) is a common and deteriorating event leading to in-hospital morbidity and mortality. Identification of predictors for in-hospital mortality of AECOPD patients could aid clinicians in identifying patients with a higher risk of death during their hospitalisation. Objective To explore potential prognostic indicators associated with in-hospital mortality of AECOPD patients. Setting General medical ward and medical intensive care unit of a university-affiliated tertiary care centre. Methods A prognostic factor research was conducted with a retrospective cohort design. All admission records of AECOPD patients between October 2015 and September 2016 were retrieved. Stratified Cox’s regression was used for the primary analysis. Results A total of 516 admission records of 358 AECOPD patients were included in this study. The in-hospital mortality rate of the cohort was 1.9 per 100 person-day. From stratified Cox’s proportional hazard regression, the predictors of in-hospital mortality were aged 80 years or more (HR=2.16, 95% CI: 1.26 to 3.72, p=0.005), respiratory failure on admission (HR=2.50, 95% CI: 1.12 to 5.57, p=0.025), body temperature more than 38°C (HR=2.97, 95% CI: 1.61 to 5.51, p=0.001), mean arterial pressure lower than 65 mm Hg (HR=4.01, 95% CI: 1.88 to 8.60, p<0.001), white blood cell count more than 15 x 109/L (HR=3.51, 95% CI: 1.90 to 6.48, p<0.001) and serum creatinine more than 1.5 mg/dL (HR=2.08, 95% CI: 1.17 to 3.70, p=0.013). Conclusion Six independent prognostic indicators for in-hospital mortality of AECOPD patients were identified. All of the parameters were readily available in routine practice and can be used as an aid for risk stratification of AECOPD patients.
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Affiliation(s)
- Thotsaporn Morasert
- Pulmonary and Critical care Medicine, Department of Internal Medicine, Suratthani Hospital, Surat Thani, Suratthani, Thailand
| | - Methus Jantarapootirat
- Pulmonary and Critical care Medicine, Department of Internal Medicine, Suratthani Hospital, Surat Thani, Suratthani, Thailand
| | - Phichayut Phinyo
- Center for Clinical Epidemiology and Clinical Statistics, Chiang Mai University Faculty of Medicine, Chiang Mai, Thailand
| | - Jayanton Patumanond
- Center for Clinical Epidemiology and Clinical Statistics, Chiang Mai University Faculty of Medicine, Chiang Mai, Thailand
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14
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Zysman M, Ribeiro Baptista B, Soumagne T, Marques da Silva V, Martin C, Thibault de Menonville C, Boyer L, Degano B, Morelot Panzini C, Burgel PR, Perez T, Bourdin A, Raherison C, Pégliasco H, Piperno D, Zanetti C, Morel H, Delclaux B, Delafosse C, Lorenzo A, Housset B, Chabot F, Devillier P, Deslée G, Roche N. [Pharmacological treatment optimisation in patients with stale COPD. Position of the French-language Respiratory Society. 2021 Update]. Rev Mal Respir 2021; 38:539-561. [PMID: 33985869 DOI: 10.1016/j.rmr.2021.02.070] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 02/21/2021] [Indexed: 01/19/2023]
Affiliation(s)
- M Zysman
- Université Bordeaux, centre de recherche cardiothoracique de Bordeaux, U1045, CIC 1401, 33604 Pessac, France; Service des maladies respiratoires, CHU Bordeaux, Bordeaux, France.
| | - B Ribeiro Baptista
- Université Paris-Est, UMR S955, UPEC, 94000 Créteil, France; Département de pneumologie, CHRU Nancy, université de Lorraine, Inserm, U1116, université de Lorraine, Nancy/Vandœuvre-lès-Nancy, France
| | - T Soumagne
- Service de pneumologie, oncologie thoracique et allergologie respiratoire, CHU de Besançon, Besançon, France
| | | | - C Martin
- Department of Respir Med, Cochin Hospital, Assistance publique-Hôpitaux de Paris, Paris, France; Université de Paris, Paris, France; INSERM U1016, Institut Cochin, Paris, France
| | | | - L Boyer
- Université Paris-Est, UMR S955, UPEC, 94000 Créteil, France; Département de physiologie-explorations fonctionnelles, AP-HP, hôpital Henri-Mondor, Paris, France
| | - B Degano
- Service hospitalier universitaire pneumologie physiologie, pôle thorax et vaisseaux, CHU Grenoble Alpes, Grenoble, France; Université Grenoble Alpes, Grenoble, France
| | - C Morelot Panzini
- Sorbonne Université, AP-HP, Service de Pneumologie, Médecine Intensive et Réanimation, Pitié-Salpêtrière Hospital, Paris, France
| | - P R Burgel
- Department of Respir Med, Cochin Hospital, Assistance publique-Hôpitaux de Paris, Paris, France; Université de Paris, Paris, France; INSERM U1016, Institut Cochin, Paris, France
| | - T Perez
- Service de pneumologie, CHU Lille, institut Pasteur de Lille, U1019, UMR9017, centre d'infection et d'immunité de Lille (CIIL), Lille, France
| | - A Bourdin
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, Montpellier, France; Department of Respiratory Diseases, University of Montpellier, CHU Montpellier, Montpellier, France
| | - C Raherison
- Service des maladies respiratoires, CHU Bordeaux, Bordeaux, France; Bordeaux Population Health Research Center, université Bordeaux, INSERM, Team EPICENE, UMR 1219, Bordeaux, France
| | - H Pégliasco
- Service de pneumologie, hôpital européen, Marseille, France
| | | | - C Zanetti
- Cabinet de pneumologie, 62300 Lens, France
| | - H Morel
- Service de pneumologie d'allergologie et d'oncologie thoracique, CHR d'Orléans, 45067 Orléans, France
| | - B Delclaux
- Service de pneumologie, centre hospitalier de Troyes, 10003 Troyes, France
| | - C Delafosse
- Centre hospitaliser Simone-Veil, 95602 Eaubonne, France
| | - A Lorenzo
- Médecine Sorbonne université, département de médecine générale, Paris, France
| | - B Housset
- Département de pneumologie, CHI de Créteil, University Paris Est Créteil, Créteil, France
| | - F Chabot
- Département de pneumologie, CHRU Nancy, université de Lorraine, Inserm, U1116, université de Lorraine, Nancy/Vandœuvre-lès-Nancy, France
| | - P Devillier
- Department of Airway Diseases, VIM-Suresnes, UMR0892, Foch Hospital, Paris-Saclay University, Suresnes, France
| | - G Deslée
- Service de pneumologie, Inserm U1250, CHU Reims, université Reims Champagne Ardenne, Reims, France
| | - N Roche
- Department of Respir Med, Cochin Hospital, Assistance publique-Hôpitaux de Paris, Paris, France; Université de Paris, Paris, France; INSERM U1016, Institut Cochin, Paris, France
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15
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Kostikas K, Papathanasiou E, Papaioannou AI, Bartziokas K, Papanikolaou IC, Antonakis E, Makou I, Hillas G, Karampitsakos T, Papaioannou O, Dimakou K, Apollonatou V, Verykokou G, Papiris S, Bakakos P, Loukides S. Blood eosinophils as predictor of outcomes in patients hospitalized for COPD exacerbations: a prospective observational study. Biomarkers 2021; 26:354-362. [PMID: 33724121 DOI: 10.1080/1354750x.2021.1903998] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
PURPOSE In the present prospective multicentre observational study, we evaluated the potential role of blood eosinophils on the outcomes of patients hospitalized for COPD exacerbations. MATERIAL AND METHODS Consecutive patients >40 years with a previous COPD diagnosis were recruited. Blood eosinophils were measured on admission prior to the initiation of treatment and were evaluated in three groups (<50, 50-149 and ≥150 cells/μL). Patients received standard care and were followed up for a year. RESULTS A total of 388 patients were included (83.5% male, mean age 72 years). Patients with higher blood eosinophils had less dyspnoea (Borg scale), lower C-reactive protein (CRP) and higher PaO2/FiO2 (partial pressure for oxygen/fraction of inhaled oxygen), and were discharged earlier (median 11 vs. 9 vs. 5 days for patients with <50, 50-149 and ≥150 cells/μL, respectively). Patients with <50 cells/μL presented higher 30-day and 1-year mortality, whereas there were no differences in moderate/severe COPD exacerbations between the three groups. In a post hoc analysis, treatment with inhaled corticosteroids as per physicians' decision was associated with better exacerbation prevention during follow-up in patients with ≥150 cells/μL. CONCLUSIONS Higher blood eosinophils were associated with better outcomes in hospitalized COPD patients, further supporting their use as a prognostic biomarker.
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Affiliation(s)
| | - Evgenia Papathanasiou
- 2nd Respiratory Medicine Department, National and Kapodistrian University of Athens, Athens, Greece
| | - Andriana I Papaioannou
- 2nd Respiratory Medicine Department, National and Kapodistrian University of Athens, Athens, Greece
| | - Konstantinos Bartziokas
- Respiratory Medicine Department, University of Ioannina, Ioannina, Greece.,2nd Respiratory Medicine Department, National and Kapodistrian University of Athens, Athens, Greece
| | | | | | - Ioanna Makou
- Respiratory Medicine Department, Corfu General Hospital, Corfu, Greece
| | - Georgios Hillas
- 5th Respiratory Medicine Department, Sotiria Chest Hospital, Athens, Greece
| | | | | | - Katerina Dimakou
- 5th Respiratory Medicine Department, Sotiria Chest Hospital, Athens, Greece
| | - Vicky Apollonatou
- 2nd Respiratory Medicine Department, National and Kapodistrian University of Athens, Athens, Greece
| | - Galateia Verykokou
- 2nd Respiratory Medicine Department, National and Kapodistrian University of Athens, Athens, Greece
| | - Spyros Papiris
- 2nd Respiratory Medicine Department, National and Kapodistrian University of Athens, Athens, Greece
| | - Petros Bakakos
- 1st Respiratory Medicine Department, National and Kapodistrian University of Athens, Athens, Greece
| | - Stelios Loukides
- 2nd Respiratory Medicine Department, National and Kapodistrian University of Athens, Athens, Greece
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16
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Lee LY, Hew GSY, Mehta M, Shukla SD, Satija S, Khurana N, Anand K, Dureja H, Singh SK, Mishra V, Singh PK, Gulati M, Prasher P, Aljabali AAA, Tambuwala MM, Thangavelu L, Panneerselvam J, Gupta G, Zacconi FC, Shastri M, Jha NK, Xenaki D, MacLoughlin R, Oliver BG, Chellappan DK, Dua K. Targeting eosinophils in respiratory diseases: Biological axis, emerging therapeutics and treatment modalities. Life Sci 2021; 267:118973. [PMID: 33400932 DOI: 10.1016/j.lfs.2020.118973] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 02/07/2023]
Abstract
Eosinophils are bi-lobed, multi-functional innate immune cells with diverse cell surface receptors that regulate local immune and inflammatory responses. Several inflammatory and infectious diseases are triggered with their build up in the blood and tissues. The mobilization of eosinophils into the lungs is regulated by a cascade of processes guided by Th2 cytokine generating T-cells. Recruitment of eosinophils essentially leads to a characteristic immune response followed by airway hyperresponsiveness and remodeling, which are hallmarks of chronic respiratory diseases. By analysing the dynamic interactions of eosinophils with their extracellular environment, which also involve signaling molecules and tissues, various therapies have been invented and developed to target respiratory diseases. Having entered clinical testing, several eosinophil targeting therapeutic agents have shown much promise and have further bridged the gap between theory and practice. Moreover, researchers now have a clearer understanding of the roles and mechanisms of eosinophils. These factors have successfully assisted molecular biologists to block specific pathways in the growth, migration and activation of eosinophils. The primary purpose of this review is to provide an overview of the eosinophil biology with a special emphasis on potential pharmacotherapeutic targets. The review also summarizes promising eosinophil-targeting agents, along with their mechanisms and rationale for use, including those in developmental pipeline, in clinical trials, or approved for other respiratory disorders.
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Affiliation(s)
- Li-Yen Lee
- School of Pharmacy, International Medical University (IMU), Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Geena Suet Yin Hew
- School of Pharmacy, International Medical University (IMU), Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Meenu Mehta
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, NSW 2007, Australia
| | - Shakti D Shukla
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute (HMRI), University of Newcastle, New Lambton Heights, Newcastle, NSW 2305, Australia
| | - Saurabh Satija
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, NSW 2007, Australia; School of Pharmaceutical Sciences, Lovely Professional University, Phagwara 144411, Punjab, India
| | - Navneet Khurana
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara 144411, Punjab, India
| | - Krishnan Anand
- Department of Chemical Pathology, School of Pathology, Faculty of Health Sciences and National Health Laboratory Service, University of the Free State, Bloemfontein, South Africa
| | - Harish Dureja
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, Haryana 124001, India
| | - Sachin Kumar Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara 144411, Punjab, India
| | - Vijay Mishra
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara 144411, Punjab, India
| | - Pankaj Kumar Singh
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana 500037, India
| | - Monica Gulati
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara 144411, Punjab, India
| | - Parteek Prasher
- Department of Chemistry, University of Petroleum & Energy Studies, Dehradun 248007, India
| | - Alaa A A Aljabali
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Yarmouk University, Irbid, Jordan
| | - Murtaza M Tambuwala
- School of Pharmacy and Pharmaceutical Sciences, Ulster University, Coleraine, County Londonderry, BT52 1SA, Northern Ireland, United Kingdom
| | - Lakshmi Thangavelu
- Department of Pharmacology, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
| | - Jithendra Panneerselvam
- Department of Pharmaceutical Technology, International Medical University (IMU), Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Gaurav Gupta
- School of Pharmacy, Suresh Gyan Vihar University, Jagatpura, Jaipur 302017, India
| | - Flavia C Zacconi
- Departamento de Química Orgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile; Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Madhur Shastri
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart 7005, Australia
| | - Niraj Kumar Jha
- Department of Biotechnology, School of Engineering & Technology (SET), Sharda University, Greater Noida 201310, India
| | - Dikaia Xenaki
- Woolcock Institute of Medical Research, University of Sydney, Sydney, New South Wales, Australia
| | - Ronan MacLoughlin
- Aerogen, IDA Business Park, Dangan, H91 HE94 Galway, Ireland; School of Pharmacy & Biomolecular Sciences, Royal College of Surgeons in Ireland, D02 YN77 Dublin, Ireland; School of Pharmacy and Pharmaceutical Sciences, Trinity College, D02 PN40 Dublin, Ireland
| | - Brian G Oliver
- Woolcock Institute of Medical Research, University of Sydney, Sydney, New South Wales, Australia; School of Life Sciences, University of Technology Sydney, Sydney, New South Wales 2007, Australia.
| | - Dinesh Kumar Chellappan
- Department of Life Sciences, School of Pharmacy, International Medical University (IMU), Bukit Jalil, 57000 Kuala Lumpur, Malaysia.
| | - Kamal Dua
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, NSW 2007, Australia; Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute (HMRI), University of Newcastle, New Lambton Heights, Newcastle, NSW 2305, Australia; School of Pharmaceutical Sciences, Shoolini University, Solan, Himachal Pradesh 173229, India.
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17
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Chan MC, Yeung YC, Yu ELM, Yu WC. Blood Eosinophil and Risk of Exacerbation in Chronic Obstructive Pulmonary Disease Patients: A Retrospective Cohort Analysis. Int J Chron Obstruct Pulmon Dis 2020; 15:2869-2877. [PMID: 33204083 PMCID: PMC7667703 DOI: 10.2147/copd.s268018] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/31/2020] [Indexed: 01/01/2023] Open
Abstract
Purpose Blood eosinophil is a readily available biomarker to reflect the eosinophilic inflammation in chronic obstructive pulmonary disease (COPD) patients, yet its association with exacerbation is inconclusive. It is uncertain which measurement, eosinophil percentage or absolute eosinophil count, should be used and what is the optimal cutoff for exacerbation prediction. Patients and Methods A total of 247 COPD patients were included in this retrospective cohort study. Blood eosinophil during stable disease state, baseline demographics, and clinical characteristics in 12 months after the index complete blood count (CBC) were recorded. Exacerbation frequencies were compared between patients with high and low blood eosinophil percentage using 2% as cut-off. Logistic regression and receiver operating characteristics (ROC) curve analyses were conducted. Results Patients with blood eosinophil ≥2% were associated with more frequent exacerbations than patients with eosinophil <2% in the 12 months after the index CBC (mean exacerbation 1.07 vs 0.34, p < 0.001). Higher blood eosinophil percentage conferred a higher risk of exacerbation. Adjusted odds ratio for exacerbation in 12 months after the index CBC for blood eosinophil ≥2% was 2.98 (95% confidence interval = 1.42–6.25). The area under the ROC curve of eosinophil percentage was significantly higher than that of absolute eosinophil count (0.678 vs 0.640, p = 0.010). The optimal cutoff of blood eosinophil percentage for exacerbation prediction was 2.8%. Conclusion Blood eosinophilia was associated with higher exacerbation risk in COPD patients. Further studies are required to elucidate the mechanism of eosinophilic inflammation in COPD and determine the optimal treatment strategy to reduce exacerbations.
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Affiliation(s)
- Ming Chiu Chan
- Department of Medicine and Geriatrics, Princess Margaret Hospital, Hong Kong, China
| | - Yiu Cheong Yeung
- Department of Medicine and Geriatrics, Princess Margaret Hospital, Hong Kong, China
| | - Ellen Lok Man Yu
- Clinical Research Centre, Princess Margaret Hospital, Hong Kong, China
| | - Wai Cho Yu
- Department of Medicine and Geriatrics, Princess Margaret Hospital, Hong Kong, China
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18
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Papaioannou AI, Loukides S, Bakakos P, Kosmas EN, Rovina N, Steiropoulos P, Fouka E, Hillas G, Patentalakis G, Kouvela M, Tzanakis N. Dual Bronchodilator in the Era of Triple Therapy. Int J Chron Obstruct Pulmon Dis 2020; 15:2695-2705. [PMID: 33149567 PMCID: PMC7604249 DOI: 10.2147/copd.s273987] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/23/2020] [Indexed: 01/18/2023] Open
Abstract
Pharmacological medications used for the treatment of COPD patients have increased significantly. Long-acting bronchodilators have been recognized as the mainstay of the treatment of stable COPD, while ICS are usually added in patients with COPD who experience exacerbations, despite bronchodilator treatment. In the latest years, several studies have been published showing the beneficial effect of adding ICS on dual bronchodilation in patients suffering from more severe disease comparing triple therapy with several therapeutic regiments including dual bronchodilation and providing a message that this triple therapy might be more appropriate for COPD patients. However, not all COPD patients have a desirable response to ICS treatment while long-term ICS use in COPD is associated with several side effects. In this report, we aimed to provide a review of the current knowledge on the importance of dual bronchodilation on COPD patients and to compare its use with triple therapy, by covering a wide spectrum of topics. Finally, we propose an algorithm on performing treatment step up from dual bronchodilation to triple therapy and step down from triple to double bronchodilation considering the current evidence.
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Affiliation(s)
- Andriana I Papaioannou
- 2nd Respiratory Medicine Department, University of Athens, "Attikon" University Hospital, Athens, Greece
| | - Stelios Loukides
- 2nd Respiratory Medicine Department, University of Athens, "Attikon" University Hospital, Athens, Greece
| | - Petros Bakakos
- 1st Respiratory Medicine Department, University of Athens, "Sotiria" Chest Hospital, Athens, Greece
| | | | - Nikoletta Rovina
- 1st Respiratory Medicine Department, University of Athens, "Sotiria" Chest Hospital, Athens, Greece
| | - Paschalis Steiropoulos
- Department of Respiratory Medicine, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Evangellia Fouka
- Respiratory Medicine Department, Aristotle University of Thessaloniki, G Papanikolaou Hospital, Thessaloniki, Greece
| | - Georgios Hillas
- 5th Respiratory Medicine Department, Sotiria Chest Hospital, Athens, Greece
| | | | - Marousa Kouvela
- 3rd Department of Medicine, Athens Medical School, Athens, Greece
| | - Nikos Tzanakis
- Department of Thoracic Medicine, Faculty of Medicine, University of Crete, Crete, Greece
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19
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Mycroft K, Krenke R, Górska K. Eosinophils in COPD-Current Concepts and Clinical Implications. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2020; 8:2565-2574. [PMID: 32251737 DOI: 10.1016/j.jaip.2020.03.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 02/03/2020] [Accepted: 03/08/2020] [Indexed: 01/20/2023]
Abstract
In recent years, heterogeneity in chronic obstructive pulmonary disease (COPD) inflammatory patterns has been recognized as a basis for more precise treatment interventions because current therapies have limited effectiveness. Eosinophilic airway inflammation in COPD has become a subject of research interest as a potential treatment target for inhaled corticosteroid therapy. However, the role of eosinophils in COPD is still unclear, and it is unknown why only some patients with COPD develop eosinophilic airway inflammation. Induced sputum analysis is the most common method of assessing the type of airway inflammation. Accessibility to sputum induction, however, is limited in clinical practice, and blood eosinophils have been proposed to serve as a surrogate marker and treatment guide. Blood eosinophil count has been shown to poorly predict sputum eosinophilia, and, moreover, it seems to be fairly unstable and affected by various factors. Nevertheless, in several trials, blood eosinophil count appeared to predict good response to inhaled corticosteroids However, biologics targeting eosinophils do not appear to be effective in COPD. In this review, we briefly summarize the current knowledge on eosinophils in COPD pathogenesis. Then, we discuss the use of blood eosinophil count in COPD in relation to the recent Global Initiative for Chronic Obstructive Pulmonary Disease recommendations, their ability to predict sputum eosinophilia, and their potential role in guiding treatment.
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Affiliation(s)
- Katarzyna Mycroft
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, Warsaw, Poland
| | - Rafal Krenke
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, Warsaw, Poland
| | - Katarzyna Górska
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, Warsaw, Poland.
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Yoon JK, Lee JK, Lee CH, Hwang YI, Kim H, Park D, Hwang KE, Kim SH, Jung KS, Yoo KH, Ra SW, Kim DK. The Association Between Eosinophil Variability Patterns and the Efficacy of Inhaled Corticosteroids in Stable COPD Patients. Int J Chron Obstruct Pulmon Dis 2020; 15:2061-2070. [PMID: 32943859 PMCID: PMC7473991 DOI: 10.2147/copd.s258353] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 07/09/2020] [Indexed: 11/23/2022] Open
Abstract
Introduction Blood eosinophils are a predictive marker for the use of inhaled corticosteroids (ICS). However, there is concern over whether a single measure of blood eosinophils is sufficient for outlining a treatment plan. Here, we evaluated the association between variability in blood eosinophils and the effects of ICS in stable COPD cohorts. Methods COPD patients in the Korean COPD Subtype Study and the Seoul National University Airway Registry from 2011 to 2018 were analyzed. Based on blood eosinophils at baseline and at 1-year follow-up, the patients were classified into four groups with 250/μL as a cutoff value: consistently high (CH), consistently low (CL), variably increasing (VI), and variably decreasing (VD). We compared rates of acute exacerbations (AEs) according to ICS use in each group after calibration of severity using propensity score matching. Results Of 2,221 COPD patients, 618 were analyzed and a total of 125 (20%), 355 (57%), 63 (10%), and 75 (12%) patients were classified into the CH, CL, VI, and VD groups, respectively. After calibration, we found that ICS users tended to have a lower AE rate in the CH group (RR 0.41, 95% CI 0.21–0.74) and VI group (RR 0.45, 95% CI 0.22–0.88), but not in the CL group (RR 1.42, 95% CI 1.08–1.89) and VD group (RR 1.71, 95% CI 1.00–2.96). Conclusion More than one-fifth of patients had an inconsistent blood eosinophil level after the 1-year follow-up, and the AE-COPD rate according to ICS differed based on variability in eosinophils. Regular follow-up of blood eosinophils is required for COPD patients.
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Affiliation(s)
- Jung-Ki Yoon
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Jung-Kyu Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Republic of Korea
| | - Chang-Hoon Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Yong Il Hwang
- Department of Internal Medicine, College of Medicine, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea
| | - Hyunkuk Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Inje University Haeundae Paik Hospital, Busan, Republic of Korea
| | - Dongil Park
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea
| | - Ki-Eun Hwang
- Department of Internal Medicine, Wonkwang University, School of Medicine, Iksan, Republic of Korea
| | - Sang-Heon Kim
- Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Republic of Korea
| | - Ki-Suck Jung
- Department of Internal Medicine, College of Medicine, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea
| | - Kwang Ha Yoo
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Republic of Korea
| | - Seung Won Ra
- Department of Internal Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Republic of Korea
| | - Deog Kyeom Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Republic of Korea.,Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
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Antus B, Paska C, Barta I. Predictive Value of Exhaled Nitric Oxide and Blood Eosinophil Count in the Assessment of Airway Eosinophilia in COPD. Int J Chron Obstruct Pulmon Dis 2020; 15:2025-2035. [PMID: 32921998 PMCID: PMC7457875 DOI: 10.2147/copd.s257965] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 07/15/2020] [Indexed: 12/18/2022] Open
Abstract
Purpose Fractional exhaled nitric oxide (FENO50) level and peripheral blood eosinophil count may serve as indicators of airway eosinophilia. The aim of this study was to estimate the diagnostic value of these markers for detecting airway eosinophilia in patients with stable chronic obstructive pulmonary disease (COPD) and those experiencing an acute exacerbation (AECOPD). Patients and Methods FENO50 levels, sputum and blood eosinophil counts were assessed in 53 clinically stable ex-smoker COPD patients and 67 ex-smoker COPD patients experiencing a severe exacerbation. In AECOPD, clinical variables were measured at the time of hospital admission and discharge following treatment. Results In stable COPD, blood eosinophil count but not FENO50 level was found to be a good predictor of airway eosinophilia (area under the receiver operating characteristic curve [ROC AUC]: ≥0.82). The sensitivity and the specificity of the test ranged between 75% and 98%, the negative predictive value (NPV) was high (>90%). In AECOPD, FENO50 was predictive for airway eosinophilia (ROC AUC: >0.8) with high NPV (>88%), but with lower sensitivity and specificity (64-70%). In contrast, the predictive accuracy of blood eosinophil count for airway eosinophilia in AECOPD was modest (ROC AUC: 0.54-0.63). The combined use of the two markers provided only limited additional benefit. Correlation analyses supported ROC curve findings. Conclusion In stable COPD the peripheral blood eosinophil count, while in AECOPD the FENO50 level is a good surrogate marker of airway eosinophilia.
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Affiliation(s)
- Balazs Antus
- Department of Pathophysiology, National Koranyi Institute of Pulmonology, BudapestH-1121, Hungary
- Department of Pulmonology, National Koranyi Institute of Pulmonology, BudapestH-1121, Hungary
| | - Csilla Paska
- Department of Pathophysiology, National Koranyi Institute of Pulmonology, BudapestH-1121, Hungary
| | - Imre Barta
- Department of Pathophysiology, National Koranyi Institute of Pulmonology, BudapestH-1121, Hungary
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Menzies-Gow A, Mansur AH, Brightling CE. Clinical utility of fractional exhaled nitric oxide in severe asthma management. Eur Respir J 2020; 55:13993003.01633-2019. [PMID: 31949116 DOI: 10.1183/13993003.01633-2019] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 12/25/2019] [Indexed: 02/06/2023]
Abstract
Asthma is a chronic inflammatory disease of the airways, affecting over 350 million people worldwide and placing a significant burden on healthcare providers and wider society. Approximately 5-10% of asthma patients are diagnosed with severe asthma and typically are associated with increased risk of hospitalisation from exacerbations, increased morbidity, mortality and higher asthma-associated healthcare costs. Nitric oxide (NO) is an important regulator of immune responses and is a product of inflammation in the airways that is over-produced in asthma. Fractional exhaled NO (F eNO) is predominantly used as a predictor of response to inhaled corticosteroids (ICSs), to monitor adherence and as a diagnostic tool in ICS-naïve patients. In the UK, the National Institute for Health and Care Excellence (NICE) guidelines recommend the use of F eNO for the initial diagnosis of patients with suspected asthma. In the USA, American Thoracic Society (ATS) guidelines recommend F eNO as part of the initial diagnosis of asthma and for monitoring of airway inflammation. F eNO has also been shown to be a predictive factor for asthma exacerbations, with higher levels being associated with a greater number of exacerbations. In addition, higher levels of F eNO have been shown to be associated with a decline in lung function. F eNO testing is a cost-effective procedure and has been shown to improve patient management when combined with standard assessment methods. Recent evidence suggests that F eNO may also be useful as a surrogate biomarker for the assessment and management of severe asthma and to predict responsiveness to some biological therapies.
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Affiliation(s)
| | - Adel H Mansur
- Dept of Respiratory Medicine, Heartlands Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.,Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK
| | - Christopher E Brightling
- Institute for Lung Health, NIHR Leicester Biomedical Research Centre, Dept of Respiratory Sciences, University of Leicester, Leicester, UK
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Abstract
PURPOSE OF REVIEW To discuss the current use of oral corticosteroids (OCS) as a chronic treatment in patients with severe asthma and as a rescue treatment for patients presenting with acute exacerbations. RECENT FINDINGS Airways disease is responsible for the bulk of OCS use in the community and considerable OCS-associated morbidity. I speculate that the key mechanism leading to a beneficial effect in these situations is depletion of circulating eosinophils resulting in a reduced response to potentially inhaled corticosteroid unresponsive recruitment signals to the airway mucosa. This effect is shared by anti-IL-5 biological agents, which have emerged as highly effective OCS-sparing agents. Mitigation of the adverse effects of OCS might also result from a better appreciation of features associated with a response to OCS and targeted, biomarker-directed use. SUMMARY Longer term, there are real prospects that chronic and acute OCS use in asthma will be replaced by biological agents targeting eosinophilic airway inflammation more specifically and safely.
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Hillas G, Papaporfyriou A, Dimakou K, Papaioannou AI. Pharmacological treatment of stable COPD: need for a simplified approach. Postgrad Med 2020; 132:126-131. [DOI: 10.1080/00325481.2019.1706996] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- G. Hillas
- 5th Pulmonary Department, “Sotiria” Chest Diseases Hospital, Athens, Greece
| | - A. Papaporfyriou
- 2nd Respiratory Medicine Department, University of Athens, Attikon Hospital, Athens, Greece
| | - K. Dimakou
- 5th Pulmonary Department, “Sotiria” Chest Diseases Hospital, Athens, Greece
| | - A. I. Papaioannou
- 2nd Respiratory Medicine Department, University of Athens, Attikon Hospital, Athens, Greece
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Vogelmeier CF, Kostikas K, Fang J, Tian H, Jones B, Morgan CL, Fogel R, Gutzwiller FS, Cao H. Evaluation of exacerbations and blood eosinophils in UK and US COPD populations. Respir Res 2019; 20:178. [PMID: 31391053 PMCID: PMC6686508 DOI: 10.1186/s12931-019-1130-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 07/08/2019] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Blood eosinophil counts and history of exacerbations have been proposed as predictors of patients with chronic obstructive pulmonary disease (COPD) who may benefit from triple therapy (inhaled corticosteroid, long-acting β2-agonist and long-acting muscarinic antagonist). METHODS In a retrospective cohort analysis we examined the profiles of COPD patients from the UK Clinical Practice Research Datalink (CPRD) and US Optum Clinformatics™ Data Mart (Optum) databases with reference to exacerbation frequency and blood eosinophil distribution. RESULTS Of the 31,437 (CPRD) and 383,825 (Optum) patients with COPD, 15,364 (CPRD) and 139,465 (Optum) met the eligibility criteria and were included. Among patients with ≥2 exacerbations and available eosinophil counts in the baseline period (CPRD, n = 3089 and Optum, n = 13414), 17.0 and 13.3% respectively had eosinophil counts ≥400 cells/μL. Patients with ≥2 exacerbations or eosinophil count ≥400 cells/μL during first year, exacerbated at least once (CPRD, 82.8% vs Optum, 80.6%) or continued to have eosinophil count ≥300 cells/μL (76.8% vs 76.5%), respectively in the follow-up year. In both years, a higher variability in the number of exacerbations and eosinophil count was observed in patients with one exacerbation and eosinophil counts between 300 and 400 cells/μL; patients with eosinophil count < 150 cells/μL had the lowest variability. Approximately 10% patients had both ≥2 exacerbations and eosinophil count ≥300 cells/μL across the databases. CONCLUSION A high variability in blood eosinophil counts over two consecutive years was observed in UK and US patients with COPD and should be considered while making treatment decisions. A small proportion of COPD patients had frequent exacerbations and eosinophil count ≥300 cells/μL.
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Affiliation(s)
- Claus F Vogelmeier
- Department of Medicine, Pulmonary and Critical Care Medicine, University Medical Centre Giessen and Marburg, Philipps-University Marburg, Member of the German Center for Lung Research (DZL), 35043, Marburg, Germany.
| | - Konstantinos Kostikas
- Respiratory Medicine Department, University of Ioannina School of Medicine, Ioannina, Greece
| | - Juanzhi Fang
- Novartis Pharmaceuticals Corporation, East Hanover, NJ, USA
| | | | | | | | - Robert Fogel
- Novartis Pharmaceuticals Corporation, East Hanover, NJ, USA
| | | | - Hui Cao
- Novartis Pharmaceuticals Corporation, East Hanover, NJ, USA
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Reassessing the Role of Eosinophils as a Biomarker in Chronic Obstructive Pulmonary Disease. J Clin Med 2019; 8:jcm8070962. [PMID: 31269773 PMCID: PMC6678852 DOI: 10.3390/jcm8070962] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 06/18/2019] [Accepted: 06/27/2019] [Indexed: 01/21/2023] Open
Abstract
Blood eosinophils measurement, as proxy for tissue eosinophils, has become an important biomarker for exacerbation risk and response to inhaled corticosteroids (ICS) in Chronic Obstructive Pulmonary Disease (COPD). Its use to determine the pharmacological approach is recommended in the latest COPD guidelines. The potential role of blood eosinophils is mainly based on data derived from post-hoc and retrospective analyses that showed an association between increased blood eosinophils and risk of exacerbations, as well as mitigation of this risk with ICS. Yet other publications, including studies in real life COPD, do not confirm these assumptions. Moreover, anti-eosinophil therapy targeting interleukin (IL)-5 failed to reduce exacerbations in COPD patients with high blood eosinophils, which casts significant doubts on the role of eosinophils in COPD. Furthermore, a reduction of eosinophils might be harmful since COPD patients with relatively high eosinophils have better pulmonary function, better life quality, less infections and longer survival. These effects are probably linked to the role of eosinophils in the immune response against pathogens. In conclusion, in COPD, high blood eosinophils are widely used as a biomarker for exacerbation risk and response to ICS. However, much is yet to be learned about the reasons for the high eosinophil counts, their variations and their controversial effects on the fate of COPD patients.
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27
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Müllerová H, Hahn B, Simard EP, Mu G, Hatipoğlu U. Exacerbations and health care resource use among patients with COPD in relation to blood eosinophil counts. Int J Chron Obstruct Pulmon Dis 2019; 14:683-692. [PMID: 30962682 PMCID: PMC6435122 DOI: 10.2147/copd.s194367] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Purpose Current understanding of the relationship between COPD phenotype and health care resource utilization (HCRU) is limited. This real-world study evaluated disease burden and HCRU for COPD subgroups prone to exacerbation as defined by blood eosinophil (EOS) count and multiple inhaler triple therapy (MITT) use. Methods This was a large-scale, retrospective, longitudinal, observational cohort study using data from the US IBM Watson Explorys real-world database (GSK Study HO-17-18395). The population of interest comprised patients with COPD ≥40 years of age with ≥2 moderate or ≥1 severe exacerbations (prior year) while on inhaled maintenance therapy, with ≥1 blood EOS count. Data were analyzed during the year prior to index date (last COPD encounter between January 1, 2011 and December 31, 2016). Four subgroups were analyzed based on a combination of EOS counts (<150 and ≥150 cells/μL) and MITT use (receiving or not receiving). Among these groups, clinical characteristics, exacerbations, and HCRU were described. A sensitivity analysis that further stratified EOS into four categories (<150, ≥150-<300, ≥300-<500, and ≥500 cells/μL) was also performed. Results The COPD population of interest comprised 34,268 patients. Subgroups with EOS ≥150 cells/μL vs <150 cells/μL had more comorbidities and experienced significantly higher mean numbers of moderate exacerbations (not receiving MITT, ≥150 cells/μL vs <150 cells/μL: 1.93 vs 1.82, P<0.0001; receiving MITT 2.26 vs 2.16, P=0.0062) and COPD-related emergency visits (not receiving MITT, ≥150 cells/μL vs <150 cells/μL: 3.0 vs 2.5, P<0.001; receiving MITT 3.4 vs 3.1, P=0.0011). Increasing EOS category was associated with higher HCRU. Conclusion Blood EOS ≥150/μL cells were associated with increased HCRU and higher exacerbation rates compared with EOS <150 cells/μL, irrespective of MITT use. COPD phenotyping using blood EOS could help identify candidates for additional therapies that target eosinophilic inflammatory pathways.
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Affiliation(s)
- Hana Müllerová
- Real-World Evidence, GSK, Stockley Park, Uxbridge, Middlesex, UK
| | - Beth Hahn
- US Medical Affairs, GSK, Research Triangle Park, NC, USA,
| | - Edgar P Simard
- Real-World Data and Analytics, GSK, Upper Providence, PA, USA
| | - George Mu
- Real-World Data and Analytics, GSK, Upper Providence, PA, USA
| | - Umur Hatipoğlu
- Center for Comprehensive Care in Chronic Obstructive Pulmonary Disease, Respiratory Institute, Cleveland Clinic, Cleveland, OH, USA
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Huang WC, Lee CH, Wu MF, Huang CC, Hsu CH, Chen HC, Hsu JY, Huang CC. Clinical features, bacteriology of endotracheal aspirates and treatment outcomes of patients with chronic obstructive pulmonary disease and community-acquired pneumonia in an intensive care unit in Taiwan with an emphasis on eosinophilia versus non-eosinophilia: a retrospective case-control study. BMJ Open 2018; 8:e020341. [PMID: 30206074 PMCID: PMC6144339 DOI: 10.1136/bmjopen-2017-020341] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 06/20/2018] [Accepted: 07/27/2018] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES The clinical implications of blood eosinophil level in patients with chronic obstructive pulmonary disease (COPD) and community-acquired pneumonia (CAP) requiring invasive mechanical ventilation (IMV) and intensive care unit (ICU) admission are still unknown. Thus, this study aimed to compare the features of such patients with and without blood eosinophilia. DESIGN This was a retrospective case-control study. SETTING An ICU of a medical centre in central Taiwan. PARTICIPANTS A total of 262 patients with COPD and CAP requiring IMV and ICU admission. RESULTS Of all participants (n=262), 32 (12.2%) had an eosinophil percentage (EP) >2% and 169 (64.5%) had an absolute eosinophil count (AEC) >300 cells/µL. Regardless of whether 2% or 300 cells/µL was used as a cut-off value, the eosinophilia group were slightly older (years) (82.9±5.4 vs 78.1±9.1, p=0.000 and 79.2±8.4 vs 77.6±9.6, p=0.246, respectively), and had a higher forced expiratory volume in 1 s/forced vital capacity (%) (56.0±8.0 vs 51.3±11.6, p=0.005 and 53.1±11.2 vs 49.5±11.2, p=0.013, respectively), less severe spirometric classification (p=0.008 and p=0.001, respectively), and lower white cell count 109/L (8.8±3.2 vs 11.1±4.9, p=0.009 and 10.3±4.4 vs 11.8±5.3, p=0.017, respectively) than the non-eosinophilia group. The bacteriology of endotracheal aspirates showed that Pseudomonas aeruginosa and other gram-negative bacilli were the most common organisms in all study groups. Participants with an EP >2% had a shorter ICU length of stay (OR=12.13, p=0.001) than those with an EP ≤2%, while an AEC >300 cells/µL was not associated with any in-ICUoutcomes. CONCLUSIONS The results of this study have significant clinical implications and should be considered when making treatment decisions for the management of patients with COPD and CAP requiring IMV and ICU admission.
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Affiliation(s)
- Wei-Chang Huang
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
- Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
- Department of Medical Technology, Jen-Teh Junior College of Medicine, Nursing and Management, Miaoli, Taiwan
| | - Ching-Hsiao Lee
- Department of Medical Technology, Jen-Teh Junior College of Medicine, Nursing and Management, Miaoli, Taiwan
| | - Ming-Feng Wu
- Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
- Department of Medical Laboratory Science and Biotechnology, Central Taiwan University of Science and Technology, Taichung, Taiwan
| | - Chen-Cheng Huang
- Division of Chest Medicine, Department of Internal Medicine, Taichung Hospital, Ministry of Health and Welfare, Taichung, Taiwan
| | - Cheng-Hui Hsu
- Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Hui-Chen Chen
- Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Jeng-Yuan Hsu
- Division of Clinical Research, Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
- School of Physical Therapy, Chung-Shan Medical University, Taichung, Taiwan
| | - Chieh-Chen Huang
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
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Yun JH, Lamb A, Chase R, Singh D, Parker MM, Saferali A, Vestbo J, Tal-Singer R, Castaldi PJ, Silverman EK, Hersh CP. Blood eosinophil count thresholds and exacerbations in patients with chronic obstructive pulmonary disease. J Allergy Clin Immunol 2018; 141:2037-2047.e10. [PMID: 29709670 PMCID: PMC5994197 DOI: 10.1016/j.jaci.2018.04.010] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 02/26/2018] [Accepted: 04/18/2018] [Indexed: 12/20/2022]
Abstract
BACKGROUND Eosinophilic airway inflammation in patients with chronic obstructive pulmonary disease (COPD) is associated with exacerbations and responsivity to steroids, suggesting potential shared mechanisms with eosinophilic asthma. However, there is no consistent blood eosinophil count that has been used to define the increased exacerbation risk. OBJECTIVE We sought to investigate blood eosinophil counts associated with exacerbation risk in patients with COPD. METHODS Blood eosinophil counts and exacerbation risk were analyzed in patients with moderate-to-severe COPD by using 2 independent studies of former and current smokers with longitudinal data. The Genetic Epidemiology of COPD (COPDGene) study was analyzed for discovery (n = 1,553), and the Evaluation of COPD Longitudinally to Identify Predictive Surrogate Endpoints (ECLIPSE) study was analyzed for validation (n = 1,895). A subset of the ECLIPSE study subjects were used to assess the stability of blood eosinophil counts over time. RESULTS COPD exacerbation risk increased with higher eosinophil counts. An eosinophil count threshold of 300 cells/μL or greater showed adjusted incidence rate ratios for exacerbations of 1.32 in the COPDGene study (95% CI, 1.10-1.63). The cutoff of 300 cells/μL or greater was validated for prospective risk of exacerbation in the ECLIPSE study, with adjusted incidence rate ratios of 1.22 (95% CI, 1.06-1.41) using 3-year follow-up data. Stratified analysis confirmed that the increased exacerbation risk associated with an eosinophil count of 300 cells/μL or greater was driven by subjects with a history of frequent exacerbations in both the COPDGene and ECLIPSE studies. CONCLUSIONS Patients with moderate-to-severe COPD and blood eosinophil counts of 300 cells/μL or greater had an increased risk exacerbations in the COPDGene study, which was prospectively validated in the ECLIPSE study.
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Affiliation(s)
- Jeong H Yun
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Mass; Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass
| | - Andrew Lamb
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Mass
| | - Robert Chase
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Mass
| | - Dave Singh
- University of Manchester, Manchester, United Kingdom
| | - Margaret M Parker
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass
| | - Aabida Saferali
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass
| | - Jørgen Vestbo
- University of Manchester, Manchester, United Kingdom; NIHR Manchester Biomedical Research Centre, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, United Kingdom
| | | | - Peter J Castaldi
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass
| | - Edwin K Silverman
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Mass; Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass
| | - Craig P Hersh
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Mass; Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass.
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Relationship of Blood Eosinophil Count to Exacerbations in Chronic Obstructive Pulmonary Disease. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2018; 6:944-954.e5. [DOI: 10.1016/j.jaip.2017.10.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 09/27/2017] [Accepted: 10/03/2017] [Indexed: 01/24/2023]
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Barnes N, Ishii T, Hizawa N, Midwinter D, James M, Hilton E, Jones PW. The distribution of blood eosinophil levels in a Japanese COPD clinical trial database and in the rest of the world. Int J Chron Obstruct Pulmon Dis 2018; 13:433-440. [PMID: 29440882 PMCID: PMC5799851 DOI: 10.2147/copd.s144108] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Blood eosinophil measurements may help to guide physicians on the use of inhaled corticosteroids (ICS) for patients with chronic obstructive pulmonary disease (COPD). Emerging data suggest that COPD patients with higher blood eosinophil counts may be at higher risk of exacerbations and more likely to benefit from combined ICS/long-acting beta2-agonist (LABA) treatment than therapy with a LABA alone. This analysis describes the distribution of blood eosinophil count at baseline in Japanese COPD patients in comparison with non-Japanese COPD patients. Methods A post hoc analysis of eosinophil distribution by percentage and absolute cell count was performed across 12 Phase II–IV COPD clinical studies (seven Japanese studies [N=848 available absolute eosinophil counts] and five global studies [N=5,397 available eosinophil counts] that included 246 Japanese patients resident in Japan with available counts). Blood eosinophil distributions were assessed at baseline, before blinded treatment assignment. Findings Among Japanese patients, the median (interquartile range) absolute eosinophil count was 170 cells/mm3 (100–280 cells/mm3). Overall, 612/1,094 Japanese patients (56%) had an absolute eosinophil count ≥150 cells/mm3 and 902/1,304 Japanese patients (69%) had a percentage eosinophil ≥2%. Among non-Japanese patients, these values were 160 (100–250) cells/mm3, 2,842/5,151 patients (55%), and 2,937/5,155 patients (57%), respectively. The eosinophil distribution among Japanese patients was similar to that among non-Japanese patients. Within multi-country studies with similar inclusion criteria, the eosinophil count was numerically lower in Japanese compared with non-Japanese patients (median 120 vs 160 cells/mm3). Interpretation The eosinophil distribution in Japanese patients seems comparable to that of non-Japanese patients; although within multi-country studies, there was a slightly lower median eosinophil count for Japanese patients compared with non-Japanese patients. These findings suggest that blood eosinophil data from global studies are of relevance in Japan.
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Affiliation(s)
- Neil Barnes
- Respiratory Medicine Franchise, GlaxoSmithKline, Brentford, UK.,William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, London, UK
| | - Takeo Ishii
- Medical Affairs, GlaxoSmithKline K.K., Tokyo, Japan.,Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Nobuyuki Hizawa
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Dawn Midwinter
- Global Respiratory Department, GlaxoSmithKline, Stockley Park, UK
| | - Mark James
- Medical Affairs, GlaxoSmithKline K.K., Tokyo, Japan
| | - Emma Hilton
- Respiratory Medicine Franchise, GlaxoSmithKline, Brentford, UK
| | - Paul W Jones
- Respiratory Medicine Franchise, GlaxoSmithKline, Brentford, UK.,Institute of Infection and Immunity, St George's University of London, London, UK
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Tashkin DP, Wechsler ME. Role of eosinophils in airway inflammation of chronic obstructive pulmonary disease. Int J Chron Obstruct Pulmon Dis 2018; 13:335-349. [PMID: 29403271 PMCID: PMC5777380 DOI: 10.2147/copd.s152291] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
COPD is a significant cause of morbidity and mortality. In some patients with COPD, eosinophils contribute to inflammation that promotes airway obstruction; approximately a third of stable COPD patients have evidence of eosinophilic inflammation. Although the eosinophil threshold associated with clinical relevance in patients with COPD is currently subject to debate, eosinophil counts hold potential as biomarkers to guide therapy. In particular, eosinophil counts may be useful in assessing which patients may benefit from inhaled corticosteroid therapy, particularly regarding exacerbation prevention. In addition, several therapies targeting eosinophilic inflammation are available or in development, including monoclonal antibodies targeting the IL5 ligand, the IL5 receptor, IL4, and IL13. The goal of this review was to describe the biologic characteristics of eosinophils, their role in COPD during exacerbations and stable disease, and their use as biomarkers to aid treatment decisions. We also propose an algorithm for inhaled corticosteroid use, taking into consideration eosinophil counts and pneumonia history, and emerging eosinophil-targeted therapies in COPD.
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Affiliation(s)
- Donald P Tashkin
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
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Oshagbemi OA, Burden AM, Braeken DCW, Henskens Y, Wouters EFM, Driessen JHM, Maitland-van der Zee AH, de Vries F, Franssen FME. Stability of Blood Eosinophils in Patients with Chronic Obstructive Pulmonary Disease and in Control Subjects, and the Impact of Sex, Age, Smoking, and Baseline Counts. Am J Respir Crit Care Med 2017; 195:1402-1404. [PMID: 28165763 DOI: 10.1164/rccm.201701-0009le] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Olorunfemi A Oshagbemi
- 1 Maastricht University Medical Center Maastricht, the Netherlands.,2 Maastricht University Maastricht, the Netherlands.,3 Utrecht Institute of Pharmaceutical Sciences Utrecht, the Netherlands.,4 CIRO Horn, the Netherlands
| | - Andrea M Burden
- 1 Maastricht University Medical Center Maastricht, the Netherlands.,2 Maastricht University Maastricht, the Netherlands.,3 Utrecht Institute of Pharmaceutical Sciences Utrecht, the Netherlands
| | - Dionne C W Braeken
- 1 Maastricht University Medical Center Maastricht, the Netherlands.,3 Utrecht Institute of Pharmaceutical Sciences Utrecht, the Netherlands.,4 CIRO Horn, the Netherlands
| | - Yvonne Henskens
- 1 Maastricht University Medical Center Maastricht, the Netherlands
| | - Emiel F M Wouters
- 1 Maastricht University Medical Center Maastricht, the Netherlands.,4 CIRO Horn, the Netherlands
| | - Johanna H M Driessen
- 1 Maastricht University Medical Center Maastricht, the Netherlands.,2 Maastricht University Maastricht, the Netherlands.,3 Utrecht Institute of Pharmaceutical Sciences Utrecht, the Netherlands
| | - Anke H Maitland-van der Zee
- 3 Utrecht Institute of Pharmaceutical Sciences Utrecht, the Netherlands.,5 Academisch Medisch Centrum Amsterdam, the Netherlands and
| | - Frank de Vries
- 1 Maastricht University Medical Center Maastricht, the Netherlands.,2 Maastricht University Maastricht, the Netherlands.,3 Utrecht Institute of Pharmaceutical Sciences Utrecht, the Netherlands.,6 Southampton General Hospital Southampton, UK
| | - Frits M E Franssen
- 1 Maastricht University Medical Center Maastricht, the Netherlands.,4 CIRO Horn, the Netherlands
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Casanova C, Celli BR, de-Torres JP, Martínez-Gonzalez C, Cosio BG, Pinto-Plata V, de Lucas-Ramos P, Divo M, Fuster A, Peces-Barba G, Calle-Rubio M, Solanes I, Aguero R, Feu-Collado N, Alfageme I, De Diego A, Romero A, Balcells E, Llunell A, Galdiz J, Marin M, Moreno A, Cabrera C, Golpe R, Lacarcel C, Soriano JB, López-Campos JL, Soler-Cataluña JJ, Marin JM. Prevalence of persistent blood eosinophilia: relation to outcomes in patients with COPD. Eur Respir J 2017; 50:50/5/1701162. [DOI: 10.1183/13993003.01162-2017] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Accepted: 07/27/2017] [Indexed: 01/21/2023]
Abstract
The impact of blood eosinophilia in chronic obstructive pulmonary disease (COPD) remains controversial.To evaluate the prevalence and stability of a high level of blood eosinophils (≥300 cells·μL–1) and its relationship to outcomes, we determined blood eosinophils at baseline and over 2 years in 424 COPD patients (forced expiratory volume in 1 s (FEV1) 60% predicted) and 67 smokers without COPD from the CHAIN cohort, and in 308 COPD patients (FEV1 60% predicted) in the BODE cohort. We related eosinophil levels to exacerbations and survival using Cox hazard analysis.In COPD patients, 15.8% in the CHAIN cohort and 12.3% in the BODE cohort had persistently elevated blood eosinophils at all three visits. A significant proportion (43.8%) of patients had counts that oscillated above and below the cut-off points, while the rest had persistent eosinophil levels <300 cells·μL–1. A similar eosinophil blood pattern was observed in controls. Exacerbation rates did not differ in patients with and without eosinophilia. All-cause mortality was lower in patients with high eosinophils compared with those with values <300 cells·μL–1 (15.8% versus 33.7%; p=0.026).In patients with COPD, blood eosinophils ≥300 cells·μL–1 persisting over 2 years was not a risk factor for COPD exacerbations. High eosinophil count was associated with better survival.
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Landis SH, Suruki R, Hilton E, Compton C, Galwey NW. Stability of Blood Eosinophil Count in Patients with COPD in the UK Clinical Practice Research Datalink. COPD 2017; 14:382-388. [PMID: 28569614 DOI: 10.1080/15412555.2017.1313827] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Blood eosinophil counts may be predictive of corticosteroid response in chronic obstructive pulmonary disease (COPD) patients. However, little is known about measurement stability, which is important for understanding the utility of blood eosinophil counts as a potential biomarker. We evaluated the stability of blood eosinophil counts over 1 year in a population-based cohort of patients with COPD in primary care. Patients were aged ≥ 40 years with forced expiratory volume in 1 second/forced vital capacity < 0.7 and ≥ 1 blood eosinophil measurement taken during a period of stable disease within 6 months of a COPD diagnosis code recorded between January 1, 2010 and December 31, 2012. Generalized linear mixed models were fitted to log-transformed data to estimate the between-(s2between) and within-patient (s2within) variance in eosinophil count; an intra-class correlation coefficient Ri was calculated (s2between/[s2between + s2within]). A sensitivity analysis was performed from which patients who were prescribed systemic corticosteroids or antibiotics at any time during follow-up were excluded. All models were adjusted for age, gender, smoking status, and asthma history. Overall, 27,557 patients were included in the full cohort (51.5% male, mean age [standard deviation] 71.1 [10.6] years) and 54% of patients had ≥ 2 eosinophil measurements (median 2 [interquartile range 1]) during follow-up. For the full cohort, Ri = 0.64, and in the sensitivity analysis subgroup, Ri = 0.70, mainly due to a decrease in s2within. For patients with COPD in primary care, eosinophil measurements demonstrated reasonable repeatability over 1 year, which increased after exclusion of patients who were prescribed systemic corticosteroids or antibiotics.
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Affiliation(s)
| | - Robert Suruki
- b Real World Evidence , GlaxoSmithKline , Research Triangle Park , North Carolina , USA
| | - Emma Hilton
- c Respiratory Medical Franchise , GlaxoSmithKline , Uxbridge , UK
| | - Chris Compton
- c Respiratory Medical Franchise , GlaxoSmithKline , Uxbridge , UK
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36
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Kolsum U, Donaldson GC, Singh R, Barker BL, Gupta V, George L, Webb AJ, Thurston S, Brookes AJ, McHugh TD, Wedzicha JA, Brightling CE, Singh D. Blood and sputum eosinophils in COPD; relationship with bacterial load. Respir Res 2017; 18:88. [PMID: 28482840 PMCID: PMC5422866 DOI: 10.1186/s12931-017-0570-5] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 05/01/2017] [Indexed: 12/20/2022] Open
Abstract
Background Sputum and blood eosinophil counts predict corticosteroid effects in COPD patients. Bacterial infection causes increased airway neutrophilic inflammation. The relationship of eosinophil counts with airway bacterial load in COPD patients is uncertain. We tested the hypothesis that bacterial load and eosinophil counts are inversely related. Methods COPD patients were seen at stable state and exacerbation onset. Sputum was processed for quantitative polymerase chain reaction detection of the potentially pathogenic microorganisms (PPM) H. influenzae, M. catarrhalis and S. pneumoniae. PPM positive was defined as total load ≥1 × 104copies/ml. Sputum and whole blood were analysed for differential cell counts. Results At baseline, bacterial counts were not related to blood eosinophils, but sputum eosinophil % was significantly lower in patients with PPM positive compared to PPM negative samples (medians: 0.5% vs. 1.25% respectively, p = 0.01). Patients with PPM positive samples during an exacerbation had significantly lower blood eosinophil counts at exacerbation compared to baseline (medians: 0.17 × 109/L vs. 0.23 × 109/L respectively, p = 0.008), while no blood eosinophil change was observed with PPM negative samples. Conclusions These findings indicate an inverse relationship between bacterial infection and eosinophil counts. Bacterial infection may influence corticosteroid responsiveness by altering the profile of neutrophilic and eosinophilic inflammation. Electronic supplementary material The online version of this article (doi:10.1186/s12931-017-0570-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Umme Kolsum
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester and University Hospital of South Manchester NHS Foundation Trust, Manchester, M23 9QZ, UK. .,The Medicines Evaluation Unit, Manchester, UK.
| | - Gavin C Donaldson
- Airways Disease Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - Richa Singh
- Airways Disease Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - Bethan L Barker
- Department of Infection, Immunity, and Inflammation, Institute for Lung Health, NIHR Respiratory Biomedical Research Unit, University of Leicester, Leicester, UK
| | - Vandana Gupta
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester and University Hospital of South Manchester NHS Foundation Trust, Manchester, M23 9QZ, UK
| | - Leena George
- Department of Infection, Immunity, and Inflammation, Institute for Lung Health, NIHR Respiratory Biomedical Research Unit, University of Leicester, Leicester, UK
| | - Adam J Webb
- Department of Genetics, University of Leicester, Leicester, UK
| | - Sarah Thurston
- Centre for Clinical Microbiology, University College London, London, UK
| | | | - Timothy D McHugh
- Centre for Clinical Microbiology, University College London, London, UK
| | - Jadwiga A Wedzicha
- Airways Disease Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - Christopher E Brightling
- Department of Infection, Immunity, and Inflammation, Institute for Lung Health, NIHR Respiratory Biomedical Research Unit, University of Leicester, Leicester, UK
| | - Dave Singh
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester and University Hospital of South Manchester NHS Foundation Trust, Manchester, M23 9QZ, UK.,The Medicines Evaluation Unit, Manchester, UK
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