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Kaenmuang P, Navasakulpong A, Lucien Geater S, Densrisereekul S, Juthong S. Blood Eosinophil Count Stability and Clinical Outcomes in Patients With Chronic Obstructive Pulmonary Disease in a High Endemic Area of Parasitic Infection: A Prospective Study. CHRONIC OBSTRUCTIVE PULMONARY DISEASES (MIAMI, FLA.) 2024; 11:350-358. [PMID: 38575373 PMCID: PMC11363965 DOI: 10.15326/jcopdf.2023.0492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/01/2024] [Indexed: 04/06/2024]
Abstract
Background The blood eosinophil count (BEC) is an effective biomarker for predicting inhaled corticosteroid responsiveness in patients with chronic obstructive pulmonary disease (COPD). Methods A 12-month prospective observational study was conducted in patients with COPD. BEC was measured at enrollment, and after 6 and 12 months. Patients were classified into 3 groups according to their baseline BEC: <100, 100-299, and ≥300 cells/µL. We aimed to describe the patterns of blood eosinophil stability in patients with stable COPD and compare the exacerbation rates and other clinical outcomes at 6 and 12 months. Results A total of 252 patients with COPD were included. The <100, 100-299, and ≥ 300 cells/μL groups consisted of 14.7%, 38.9%, and 46.4% of patients, respectively. BEC stability was highest (85%) in the ≥300 cells/μL group for both durations. The lowest stability was observed in the <100 cells/μL group at 57% and 46% after 6 and 12 months, respectively. The persistent ≥300 cells/μL group had a higher incidence of moderate-to-severe exacerbation (incidence rate ratio [IRR] 2.44, 95% confidence interval [CI]: 1.13-5.27, p value 0.023), as well as severe exacerbation (IRR 2.19, 95%CI: 1.39-3.45, p value 0.001). Other patient-reported outcomes did not differ significantly between groups. Conclusion Blood eosinophil levels had good stability in patients with COPD with a BEC ≥300 cells/µL and was associated with a high risk of exacerbation in the persistent ≥300 cells/μL group. The variability of BEC was higher in patients with COPD with a BEC <300 cells/µL.
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Affiliation(s)
- Punchalee Kaenmuang
- Division of Internal Medicine, Respiratory and Respiratory Critical Care Unit, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
| | - Asma Navasakulpong
- Division of Internal Medicine, Respiratory and Respiratory Critical Care Unit, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
| | - Sarayut Lucien Geater
- Division of Internal Medicine, Respiratory and Respiratory Critical Care Unit, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
| | - Sirikorn Densrisereekul
- Division of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
| | - Siwasak Juthong
- Division of Internal Medicine, Respiratory and Respiratory Critical Care Unit, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
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Bae J, Lee HJ, Choi KY, Lee JK, Park TY, Heo EY, Lee CH, Kim DK, Lee HW. Risk factors of acute exacerbation and disease progression in young patients with COPD. BMJ Open Respir Res 2024; 11:e001740. [PMID: 39019624 PMCID: PMC11256056 DOI: 10.1136/bmjresp-2023-001740] [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: 04/01/2023] [Accepted: 06/28/2024] [Indexed: 07/19/2024] Open
Abstract
OBJECTIVE We aimed to elucidate the clinical factors associated with acute exacerbation and disease progression in young patients with chronic obstructive pulmonary disease (COPD). METHODS This retrospective longitudinal observational study included patients with COPD aged between 20 and 50 years with post-bronchodilator forced expiratory volume in one second (FEV1)/forced vital capacity (FVC)<0.7. Eligible patients were followed up with ≥2 spirometry examinations at 1 year interval after COPD diagnosis. The primary outcome was moderate-to-severe acute exacerbation in young patients with COPD. Secondary outcomes were early initiation of regular inhalation therapy and accelerated annual post-bronchodilator FEV1 decline. RESULTS A total of 342 patients were followed up during a median of 64 months. In multivariable analyses, risk factors for moderate-to-severe exacerbation were history of asthma (adjusted HR (aHR)=2.999, 95% CI=[2.074-4.335]), emphysema (aHR=1.951, 95% CI=[1.331-2.960]), blood eosinophil count >300/µL (aHR=1.469, 95% CI=[1.038-2.081]) and low FEV1 (%) (aHR=0.979, 95% CI=[0.970-0.987]). A history of asthma, sputum, blood eosinophil count >300/µL, low FEV1 (%) and low diffusing capacity of the lung for carbon monoxide (DLCO) (%) were identified as clinical factors associated with the early initiation of regular inhalation therapy. The risk factors associated with worsened FEV1 decline were increasing age, female sex, history of pulmonary tuberculosis, sputum, low FEV1 (%) and low DLCO (%). CONCLUSIONS In young COPD patients, specific high-risk features of acute exacerbation and disease progression need to be identified, including a history of previous respiratory diseases, current respiratory symptoms, blood eosinophil counts, and structural or functional pulmonary impairment.
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Affiliation(s)
- Juye Bae
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Hospital, Jongno-gu, Seoul, Korea (the Republic of)
| | - Hyo Jin Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul Metropolitan Government Boramae Medical Center, Dongjak-gu, Seoul, Korea (the Republic of)
| | - Kwang Yong Choi
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang-si, Korea (the Republic of)
| | - Jung-Kyu Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul Metropolitan Government Boramae Medical Center, Dongjak-gu, Seoul, Korea (the Republic of)
| | - Tae Yun Park
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul Metropolitan Government Boramae Medical Center, Dongjak-gu, Seoul, Korea (the Republic of)
| | - Eun Young Heo
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul Metropolitan Government Boramae Medical Center, Dongjak-gu, Seoul, Korea (the Republic of)
| | - Chang Hoon Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Hospital, Jongno-gu, Seoul, Korea (the Republic of)
| | - Deog Kyeom Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul Metropolitan Government Boramae Medical Center, Dongjak-gu, Seoul, Korea (the Republic of)
| | - Hyun Woo Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul Metropolitan Government Boramae Medical Center, Dongjak-gu, Seoul, Korea (the Republic of)
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Choi KY, Kim HI, Rhee CK, Yoo KH, Park YB, Kim Y, Lee SE, Kim JA, Hwang YI. Comparing Costs and Healthcare Resource Utilization (HCRU) Using LAMA versus LABA/ICS at Treatment Initiation for COPD: Findings from CITRUS (Comparing the Incidence of Tiotropium and ICS/LABA in Real-World Use in South Korea) Study. Int J Chron Obstruct Pulmon Dis 2024; 19:1661-1671. [PMID: 39050737 PMCID: PMC11268597 DOI: 10.2147/copd.s448492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 06/02/2024] [Indexed: 07/27/2024] Open
Abstract
Background COPD causes substantial economic burden on healthcare. Alternative treatment strategies for COPD can be associated with different costs dependent upon their relative safety and effectiveness. We compared costs and healthcare resource utilization (HCRU) associated with LAMA or LABA/ICS initiation. Methods Using the Korean National Health Insurance Service database, we enrolled COPD patients initiating treatment with LAMA or LABA/ICS between January 2005 and April 2015. Propensity score matched individuals were compared on all-cause and COPD-related medical costs and HCRU over a three-year follow-up period. Results A total of 2444 patients were enrolled in each treatment group. LAMA group was associated with significantly lower costs than LABA/ICS group, both in all-cause (403.08 vs 474.50 USD per patient per month [PPPM], cost ratio 1.18, 95% confidence interval [CI]=1.10-1.26, p<0.0001) and COPD-related (216.37 vs 267.32 USD PPPM, cost ratio 1.24, 95% CI=1.13-1.35, p<0.0001) medical costs. All-cause HCRU was not significantly different between groups, while COPD-related HRCU was higher in LAMA group (0.66 vs 0.60 medical visits PPPM, p<0.0001). Conclusion COPD patients initiating treatment with LAMA were associated with lower all-cause and COPD-related medical costs than those starting with LABA/ICS despite the similar all-cause HCRU and higher COPD-related HCRU. Initiation with LAMA is a cost-efficient option for the treatment of COPD.
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Affiliation(s)
- Kwang Yong Choi
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang-si, Gyeonggi-do, Republic of Korea
| | - Hwan Il Kim
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang-si, Gyeonggi-do, Republic of Korea
| | - Chin Kook Rhee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kwang Ha Yoo
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Konkuk University Hospital, School of Medicine, Konkuk University, Seoul, Republic of Korea
| | - Yong Bum Park
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Kangdong Sacred Heart Hospital, Seoul, Republic of Korea
| | - Youlim Kim
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Konkuk University Hospital, School of Medicine, Konkuk University, Seoul, Republic of Korea
| | - So Eun Lee
- Respiratory, Medical Affairs, Boehringer-Ingelheim Korea, Seoul, Republic of Korea
| | - Jung-Ae Kim
- Real-World Solutions, IQVIA Korea, Seoul, Republic of Korea
| | - Yong Il Hwang
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang-si, Gyeonggi-do, Republic of Korea
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4
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Biener L, Pizarro C, Skowasch D. [Chronic obstructive pulmonary disease (COPD): eosinophilia and novel drug therapies]. INNERE MEDIZIN (HEIDELBERG, GERMANY) 2024; 65:738-745. [PMID: 38831048 DOI: 10.1007/s00108-024-01725-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/08/2024] [Indexed: 06/05/2024]
Abstract
BACKGROUND The phenotyping of chronic obstructive pulmonary disease (COPD) has increasingly gained attention in recent years, as it leads to new and individualized therapeutic concepts. OBJECTIVE The aim is to provide an overview of the heterogeneity of COPD and to summarize current drug therapy concepts, particularly in the context of eosinophilic airway inflammation. DATA Several prospective, randomized, placebo-controlled studies have shown a reduction in exacerbations and overall mortality with inhaled triple therapy using an inhaled corticosteroid and dual bronchodilation. The higher the eosinophils in the blood, the greater the expected effect. In addition, a reduction in exacerbations with biologics in COPD with eosinophilia has been demonstrated for dupilumab. Eosinophil-guided therapy for acute exacerbations is the subject of current research. CONCLUSION For COPD without exacerbations, dual bronchodilation forms the basis of inhaled therapy. With exacerbations, inhaled triple therapy is indicated for patients with a blood eosinophil count of ≥ 300/µl. This type of treatment may also be useful when eosinophils are between 100 and 300/µl. Therapy with dupilumab is a possible option for the eosinophilic phenotype in the near future.
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Affiliation(s)
- L Biener
- Medizinische Klinik und Poliklinik II - Kardiologe, Pneumologie, Angiologie, Universitätsklinikum Bonn, Venusberg Campus 1, 53127, Bonn, Deutschland.
| | - C Pizarro
- Medizinische Klinik und Poliklinik II - Kardiologe, Pneumologie, Angiologie, Universitätsklinikum Bonn, Venusberg Campus 1, 53127, Bonn, Deutschland
| | - D Skowasch
- Medizinische Klinik und Poliklinik II - Kardiologe, Pneumologie, Angiologie, Universitätsklinikum Bonn, Venusberg Campus 1, 53127, Bonn, Deutschland
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Keeratichananont W, Kaenmuang P, Geater SL, Denyuk R, Kanchanakanok C. Correlation of fractional exhaled nitric oxide (FeNO) and clinical outcomes in patients with chronic obstructive pulmonary disease: A prospective cohort study. Respir Med 2024; 229:107682. [PMID: 38815659 DOI: 10.1016/j.rmed.2024.107682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 05/24/2024] [Accepted: 05/26/2024] [Indexed: 06/01/2024]
Abstract
BACKGROUND Fractional exhaled nitric oxide (FeNO) is an acceptable and noninvasive marker for defining eosinophilic airway inflammation. Further study is necessary to clarify the role of FeNO in patients with chronic obstructive pulmonary disease (COPD). This study aimed to determine the association between FeNO levels and clinical outcomes. METHODS A prospective observational study was conducted at Songklanagarind Hospital from October 2020 to November 2022. FeNO testing and spirometry were performed at the initial visit and 12-month follow-up. Exacerbation, hospitalization, lung function decline, and all-cause mortality were analyzed to determine the association between FeNO levels and clinical outcomes. RESULTS A total of 60 patients with COPD were enrolled, 88.3 % of whom were male, with a mean age of 71.3 ± 9.5 years. There were 18 patients (30 %) in the high FeNO group (≥25 ppb) and 42 patients (70 %) in the low (<25 ppb) FeNO group. The mean blood eosinophil count (BEC) was significantly higher in the high FeNO group (p < 0.001). After a 12-month follow-up period, high FeNO group had higher exacerbation events (HR of 1.26, 95 % confidence interval (CI), 1.10-1.97, p= 0.025). Hospitalization and mortality rates were significantly higher in the high FeNO group. Regardless of the inhaled corticosteroids used, patients with high BEC and FeNO levels tended to have a greater risk of exacerbation. CONCLUSION In patients with COPD, FeNO levels are strongly correlated with BEC. Poor clinical outcomes were reported in patients with high FeNO levels. FeNO may be a useful biomarker for predicting clinical outcomes in patients with COPD.
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Affiliation(s)
- Warangkana Keeratichananont
- Respiratory and Respiratory Critical Care Medicine Unit, Division of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Punchalee Kaenmuang
- Respiratory and Respiratory Critical Care Medicine Unit, Division of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
| | - Sarayut Lucien Geater
- Respiratory and Respiratory Critical Care Medicine Unit, Division of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Ratikorn Denyuk
- Respiratory and Respiratory Critical Care Medicine Unit, Division of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Chitsanupong Kanchanakanok
- Division of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
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6
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Fachri M, Hatta M, Lestari FI, Akaputra R, Fatimah F, Wahab A, Arliniy Y, Dwiyanti R, Syukri A, Junita AR, Febrianti A, Primaguna MR, Azhar A. Eosinophil values in exacerbation and stable chronic obstructive pulmonary disease and its relationship to maintenance therapy in stable chronic obstructive pulmonary disease patients. Ann Med Surg (Lond) 2023; 85:4799-4805. [PMID: 37811025 PMCID: PMC10553057 DOI: 10.1097/ms9.0000000000001214] [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: 05/08/2023] [Accepted: 08/12/2023] [Indexed: 10/10/2023] Open
Abstract
Background Chronic obstructive pulmonary disease (COPD) is characterised by persistent and progressive airflow limitations. The study aimed to determine the relationship between eosinophil values in patients with stable and exacerbated COPD, and the relationship of eosinophil values with two drug regimens used as maintenance therapy in stable COPD. Materials and methods This cross-sectional study and the variables used in this study were eosinophil counts in stable and exacerbated COPD patients. Results Eighty-three patients with stable and exacerbated COPD were included. Stable COPD (63.9%) was predominant, with the highest degree of symptoms in group A 18 patients (34%) and Global Initiative for Chronic Obstructive Lung Disease (GOLD) 2; 35 patients (66%). The degree of COPD exacerbation was dominated by Type II COPD 15 patients (50%). Eosinophil counts in patients with stable COPD were less than 100 cells/mm3 37 patients (44.6%), while in patients with COPD exacerbation, it was greater than 100 cells/mm3 with a total of 30 patients (36.1%). Long acting muscarinic antagonist class of drugs was the most used treatment as maintenance therapy in stable COPD 34 patients (64.2%). Conclusion The eosinophil counts in patients with COPD exacerbation were significantly higher than those in patients with stable COPD. The provision of maintenance therapy in the long acting β-2 agonist + inhaled glucocorticosteroid group of stable COPD patients was generally provided to COPD patients with eosinophil values greater than 100 cells/mm3, and the provision of long-term maintenance therapy in stable COPD patients was generally given to COPD patients with eosinophil values less than 100 cells/mm3.
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Affiliation(s)
| | | | | | | | - Fatimah Fatimah
- Faculty of Medicine and Health, Universitas Muhammadiyah Jakarta, Jakarta
| | - Athariq Wahab
- Faculty of Medicine and Health, Universitas Muhammadiyah Jakarta, Jakarta
| | - Yunita Arliniy
- Department of Pulmonology and Respiratory Medicine, Faculty of Medicine, Syiah Kuala University, Banda Aceh
| | - Ressy Dwiyanti
- Forensic and Medicolegal
- Department of Medical Microbiology, Faculty of Medicine, Tadulako University, Palu, Indonesia
| | - Ahmad Syukri
- Departments of Molecular Biology and Immunology
- Postgraduate School, Faculty of Medicine, Hasanuddin University
- Department of Cardiology and Vascular Medicine, Dr. Tadjuddin Chalid Central General Hospital, Makassar
| | - Ade Rifka Junita
- Departments of Molecular Biology and Immunology
- Postgraduate School, Faculty of Medicine, Hasanuddin University
| | | | | | - Azhar Azhar
- Pulmonology and Respiratory Medicine, Faculty of Medicine
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7
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Kocks J, Ferreira AJ, Bakke P, van Schayck OCP, Ekroos H, Tzanakis N, Soulard S, Haaksma-Herczegh M, Mestres-Simon M, Águila-Fuentes M, Cataldo D. Investigating the rationale for COPD maintenance therapy prescription across Europe, findings from a multi-country study. NPJ Prim Care Respir Med 2023; 33:18. [PMID: 37137900 PMCID: PMC10154184 DOI: 10.1038/s41533-023-00334-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 02/20/2023] [Indexed: 05/05/2023] Open
Abstract
This study aims to understand healthcare professionals' thoughts and motivations about optimal management and treatment of patients with chronic obstructive pulmonary disease (COPD). We conducted a DELPHI survey through an online questionnaire distributed to 220 panellists from six European countries and a discrete choice experiment to describe the relationship between selected clinical criteria and the initial COPD treatment of choice. One hundred twenty-seven panellists (general practitioners [GPs] and pulmonologists) completed the survey. Despite the familiarity and use (89.8%) of the GOLD classification for initial treatment selection, a frequent use of LAMA/LABA/ICS was noted. In fact, panellists agreed that inhaled corticosteroids (ICS) are over-prescribed in the primary care setting. Our study showed that GPs felt less confident than pulmonologists with ICS withdrawal. This mismatch observed between best practice and behaviour indicates the need to increase awareness and efforts to improve the adherence to guidelines in clinical practice.
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Affiliation(s)
- Janwillem Kocks
- General Practitioners Research Institute, Groningen, The Netherlands.
- Observational and Pragmatic Research Institute, Singapore, Singapore.
- Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
- Department of Pulmonology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
| | - António Jorge Ferreira
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Pulmonology Department, Coimbra Hospital and University Centre, Coimbra, Portugal
| | - Per Bakke
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Onno C P van Schayck
- Care and Public Health Research Institute, Maastricht University, Maastricht, The Netherlands
| | - Heikki Ekroos
- Department of Pulmonary Medicine, Porvoo Hospital, Porvoo, Finland
| | - Nikolaos Tzanakis
- Department of Thoracic Medicine, University Hospital of Heraklion, Medical School, University of Crete, Crete, Greece
| | | | | | | | | | - Didier Cataldo
- Department of Respiratory Medicine, Centre Hospitalier Universitaire de Liège (CHU) and University of Liège, Liège, Belgium
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8
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Miravitlles M, Matsunaga K, Dreher M. Stepwise management of COPD: What is next after bronchodilation? Ther Adv Respir Dis 2023; 17:17534666231208630. [PMID: 37936381 PMCID: PMC10631322 DOI: 10.1177/17534666231208630] [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: 02/22/2023] [Accepted: 09/29/2023] [Indexed: 11/09/2023] Open
Abstract
Inhaled bronchodilator therapy with long-acting muscarinic antagonists (LAMAs) and long-acting β2-agonists (LABAs) in combination is currently the mainstay of treatment for chronic obstructive pulmonary disease (COPD). Treatment guidelines recommend the addition of inhaled corticosteroids (ICS) to LABA/LAMA only in patients with a history of frequent/severe exacerbations and high blood eosinophil counts, or in those with concomitant asthma. Despite this, real-world data suggest that clinicians are not adhering to this guidance and that ICS are frequently overused. This is possibly due to the incorrect assumption that when LABA/LAMA therapy is not sufficient, adding an ICS to the treatment regimen is the logical next step. In this narrative review, we describe global and country-specific guideline recommendations from Germany, Spain, and Japan and compare these with real-world data on LABA/LAMA and ICS use in clinical practice. We also provide a clinical guide to the use of add-on therapies with LABA/LAMA for different patient phenotypes, including (1) patients still symptomatic (but not exacerbating) despite LABA/LAMA treatment; (2) patients still exacerbating despite LABA/LAMA treatment who have high blood eosinophil counts; and (3) patients still exacerbating despite LABA/LAMA treatment who do not have high blood eosinophils or concomitant asthma.
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Affiliation(s)
- Marc Miravitlles
- Pneumology Department, University Hospital Vall d′Hebron/Vall d’Hebron Research Institute (VHIR, Vall d’Hebron Barcelona Hospital Campus; CIBER de Enfermedades Respiratorias [CIBERES]), P. Vall d’Hebron 119–129, Barcelona 08035, Spain
| | - Kazuto Matsunaga
- Department of Respiratory Medicine and Infectious Disease, Graduate School of Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Michael Dreher
- Department of Pneumology and Intensive Care Medicine, University Hospital Aachen, Aachen, Germany
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9
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Godbout K, Gibson PG. Defining Asthma-Chronic Obstructive Pulmonary Disease Overlap. Immunol Allergy Clin North Am 2022; 42:507-519. [PMID: 35965041 DOI: 10.1016/j.iac.2022.04.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Much interest has been given to the asthma-chronic obstructive pulmonary disease (COPD) overlap (ACO) in the past 2 decades, but the condition is still ill-defined. There is general agreement that a patient with longstanding asthma who develops fixed airflow obstruction after years of smoking has ACO although defining asthma in the face of COPD can be challenging. Many features of asthma are also found in patients with COPD without indicating an overlap and no consensus exists on which characteristics should be included in the definition of ACO. Nevertheless, some guidance has been issued to help clinicians and researchers to make a diagnosis of ACO and these will be reviewed here.
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Affiliation(s)
| | - Peter G Gibson
- Department of Respiratory and Sleep Medicine, John Hunter Hospital, Newcastle, New South Wales, Australia; Priority Research Centre for Healthy Lungs, The University of Newcastle, Newcastle, New South Wales, Australia
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10
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Yu I, Park S, Hong SH, Chang MS, Lee SJ, Yong SJ, Lee WY, Kim SH, Lee JH. Risk of Tuberculosis Caused by Fluticasone Propionate versus Budesonide in Chronic Obstructive Pulmonary Disease: A Nationwide Population-Based Study. J Pers Med 2022; 12:jpm12071189. [PMID: 35887686 PMCID: PMC9321025 DOI: 10.3390/jpm12071189] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 07/09/2022] [Accepted: 07/20/2022] [Indexed: 11/21/2022] Open
Abstract
Background: In chronic obstructive pulmonary disease (COPD), inhaled corticosteroids (ICSs) are recommended for use by patients with frequent exacerbations and blood eosinophilia. However, ICSs are often inappropriately prescribed and overused. COPD studies have reported an increased risk of tuberculosis among ICS users. This study aimed to compare the risk of tuberculosis according to the different ICS components. Methods: This study was conducted using a nationwide, population-based cohort. Patients newly diagnosed with COPD between 2005 and 2018, and treated with either fluticasone propionate or budesonide, were selected. The patients were followed up until the development of tuberculosis. Results: After propensity score matching, 16,514 fluticasone propionate and 16,514 budesonide users were identified. The incidence rate of tuberculosis per 100,000 person-years was 274.73 for fluticasone propionate and 214.18 for budesonide. The hazard ratio of tuberculosis in fluticasone propionate compared with budesonide was 1.28 (95% confidence interval 1.05–1.60). The risk of tuberculosis for fluticasone propionate increased with higher ICS cumulative doses: 1.01 (0.69–1.48), 1.16 (0.74–1.81), 1.25 (0.79–1.97), and 1.82 (1.27–2.62) from the lowest to highest quartiles, respectively. Conclusion: Fluticasone propionate is associated with a higher risk of tuberculosis than budesonide. ICS components can differently affect the risk of tuberculosis in patients with COPD.
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Affiliation(s)
- Iseul Yu
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (I.Y.); (S.P.); (M.-S.C.); (S.J.L.); (S.J.Y.); (W.-Y.L.); (S.-H.K.)
| | - Sunmin Park
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (I.Y.); (S.P.); (M.-S.C.); (S.J.L.); (S.J.Y.); (W.-Y.L.); (S.-H.K.)
| | - Se Hwa Hong
- Department of Biostatistics, Yonsei University Wonju College of Medicine, Wonju 26426, Korea;
| | - Min-Seok Chang
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (I.Y.); (S.P.); (M.-S.C.); (S.J.L.); (S.J.Y.); (W.-Y.L.); (S.-H.K.)
| | - Seok Jeong Lee
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (I.Y.); (S.P.); (M.-S.C.); (S.J.L.); (S.J.Y.); (W.-Y.L.); (S.-H.K.)
| | - Suk Joong Yong
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (I.Y.); (S.P.); (M.-S.C.); (S.J.L.); (S.J.Y.); (W.-Y.L.); (S.-H.K.)
| | - Won-Yeon Lee
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (I.Y.); (S.P.); (M.-S.C.); (S.J.L.); (S.J.Y.); (W.-Y.L.); (S.-H.K.)
| | - Sang-Ha Kim
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (I.Y.); (S.P.); (M.-S.C.); (S.J.L.); (S.J.Y.); (W.-Y.L.); (S.-H.K.)
| | - Ji-Ho Lee
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (I.Y.); (S.P.); (M.-S.C.); (S.J.L.); (S.J.Y.); (W.-Y.L.); (S.-H.K.)
- Correspondence:
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11
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Çolak Y, Lange P. Interpreting blood eosinophil counts in health and obstructive lung disease. Eur Respir J 2022; 59:59/1/2102180. [PMID: 35027374 DOI: 10.1183/13993003.02180-2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 08/12/2021] [Indexed: 01/16/2023]
Affiliation(s)
- Yunus Çolak
- Dept of Respiratory Medicine, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark .,The Copenhagen General Population Study, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.,Dept of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Peter Lange
- Dept of Respiratory Medicine, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.,The Copenhagen General Population Study, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.,Dept of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Dept of Public Health, Section of Epidemiology, University of Copenhagen, Copenhagen, Denmark
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12
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Choi JH, Jeong KB, Park YH, Yu I, Lee SJ, Lee MK, Kim SH, Lee WY, Yong SJ, Lee JH. Comparison of Risk of Pneumonia Caused by Fluticasone Propionate versus Budesonide in Chronic Obstructive Pulmonary Disease: A Nationwide Retrospective Cohort Study. Int J Chron Obstruct Pulmon Dis 2021; 16:3229-3237. [PMID: 34858023 PMCID: PMC8629914 DOI: 10.2147/copd.s332151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 11/14/2021] [Indexed: 12/30/2022] Open
Abstract
Introduction Inhaled corticosteroids (ICSs) play an important role in lowering the risk of acute exacerbation of chronic obstructive pulmonary disease (COPD). However, ICSs are known to increase the risk of pneumonia. Moreover, previous studies have shown that the incidence rate of pneumonia varies depending on the type of ICS. In this study, the risk of pneumonia according to the type of ICS was investigated in a population-based cohort. Methods A retrospective cohort study was conducted using claims data of the entire population from the Korean National Health Insurance Service. Patients who were newly diagnosed with COPD and prescribed fluticasone propionate or budesonide were enrolled as study subjects. Cumulative doses of ICSs were classified into categorical variables to analyze the risk of pneumonia within identical ICS doses. Results A total of 47,473 subjects were identified and allocated as 14,518 fluticasone propionate and 14,518 budesonide users through 1:1 propensity score matching. Fluticasone propionate users were more likely to develop pneumonia than budesonide users (14.22% vs 10.66%, p<0.0001). The incidence rate per 100,000 person-years was 2,914.77 for fluticasone propionate users and 2,102.90 for budesonide users. The hazard ratio (HR) of pneumonia in fluticasone propionate compared to budesonide was 1.34 (95% CI 1.26–1.43, p<0.0001). The risk of pneumonia for fluticasone propionate compared to budesonide increased with higher ICS cumulative doses: 1.06 (0.93–1.21), 1.41 (1.19–1.66), 1.41 (1.23–1.63), and 1.49 (1.33–1.66) from the lowest to highest quartiles, respectively. Conclusion ICS types and doses need to be carefully considered during treatment with ICSs in patients with COPD.
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Affiliation(s)
- Jae-Hwa Choi
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Keun-Bae Jeong
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - You Hyun Park
- Department of Biostatistics, Yonsei University, Seoul, Korea
| | - Iseul Yu
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Seok Jeong Lee
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Myoung Kyu Lee
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Sang-Ha Kim
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Won-Yeon Lee
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Suk Joong Yong
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Ji-Ho Lee
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
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Ellingsen J, Janson C, Bröms K, Lisspers K, Ställberg B, Högman M, Malinovschi A. Neutrophil-to-lymphocyte ratio, blood eosinophils and COPD exacerbations: a cohort study. ERJ Open Res 2021; 7:00471-2021. [PMID: 34988219 PMCID: PMC8711083 DOI: 10.1183/23120541.00471-2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 10/24/2021] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Blood neutrophil-to-lymphocyte ratio (NLR) and blood eosinophils (B-Eos) are emerging biomarkers in COPD. This study examined whether they could predict acute exacerbations of COPD (AECOPDs), and determined their longitudinal stability. METHODS In this closed cohort study, Swedish subjects with spirometry-verified COPD attended three yearly visits in a stable phase of the disease. Blood cell counts, spirometry and questionnaire-assessed AECOPD-history (worsening of COPD leading to an unscheduled visit and/or use of antibiotics and/or oral corticosteroids) were collected at each visit. RESULTS Of 466 included subjects 57% were female. Baseline mean±sd forced expiratory volume in 1 s was 58±17% predicted. High NLR (≥3.0) was more common in subjects with previous AECOPDs than in those without (33.5% versus 20.4%, p=0.002). In two-level mixed-effects logistic regression models adjusted for confounders, NLR as a continuous variable (OR 1.20, 95% CI 1.04-1.38) and B-Eos ≥300 cells·µL-1 (OR 1.54, 95% CI 1.06-2.24) were associated with future AECOPDs. In 386 subjects with blood cell data available at all three visits, the intraclass correlation coefficient for NLR was 0.61 (95% CI 0.56-0.66) and for B-Eos 0.69 (95% CI 0.64-0.73). NLR was persistently ≥3.0 in 10.6% and B-Eos was persistently ≥300 cells·µL-1 in 15.3%. CONCLUSIONS Stable phase NLR and B-Eos were associated with future AECOPDs. NLR on its own is probably not useful to predict AECOPDs but might be included in a risk scoring index. A minority of subjects with COPD had persistently elevated stable-phase NLR or B-Eos, and the biomarkers showed fair longitudinal reliability.
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Affiliation(s)
- Jens Ellingsen
- Dept of Medical Sciences, Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - Christer Janson
- Dept of Medical Sciences, Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - Kristina Bröms
- Dept of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| | - Karin Lisspers
- Dept of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| | - Björn Ställberg
- Dept of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| | - Marieann Högman
- Dept of Medical Sciences, Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - Andrei Malinovschi
- Dept of Medical Sciences, Clinical Physiology, Uppsala University, Uppsala, Sweden
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14
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Heo J, Moon DH, Hong Y, Bak SH, Kim J, Park JH, Oh BD, Kim YS, Kim WJ. Word Embedding Reveals Cyfra 21-1 as a Biomarker for Chronic Obstructive Pulmonary Disease. J Korean Med Sci 2021; 36:e224. [PMID: 34490754 PMCID: PMC8422037 DOI: 10.3346/jkms.2021.36.e224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 07/25/2021] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Although patients with chronic obstructive pulmonary disease (COPD) experience high morbidity and mortality worldwide, few biomarkers are available for COPD. Here, we analyzed potential biomarkers for the diagnosis of COPD by using word embedding. METHODS To determine which biomarkers are likely to be associated with COPD, we selected respiratory disease-related biomarkers. Degrees of similarity between the 26 selected biomarkers and COPD were measured by word embedding. And we infer the similarity with COPD through the word embedding model trained in the large-capacity medical corpus, and search for biomarkers with high similarity among them. We used Word2Vec, Canonical Correlation Analysis, and Global Vector for word embedding. We evaluated the associations of selected biomarkers with COPD parameters in a cohort of patients with COPD. RESULTS Cytokeratin 19 fragment (Cyfra 21-1) was selected because of its high similarity and its significant correlation with the COPD phenotype. Serum Cyfra 21-1 levels were determined in patients with COPD and controls (4.3 ± 5.9 vs. 3.9 ± 3.6 ng/mL, P = 0.611). The emphysema index was significantly correlated with the serum Cyfra 21-1 level (correlation coefficient = 0.219, P = 0.015). CONCLUSION Word embedding may be used for the discovery of biomarkers for COPD and Cyfra 21-1 may be used as a biomarker for emphysema. Additional studies are needed to validate Cyfra 21-1 as a biomarker for COPD.
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Affiliation(s)
- Jeongwon Heo
- Department of Internal Medicine, Kangwon National University Hospital, Chuncheon, Korea
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, Korea
| | - Da Hye Moon
- Department of Internal Medicine, Kangwon National University Hospital, Chuncheon, Korea
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, Korea
| | - Yoonki Hong
- Department of Internal Medicine, Kangwon National University Hospital, Chuncheon, Korea
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, Korea
| | - So Hyeon Bak
- Department of Radiology, School of Medicine, Kangwon National University, Chuncheon, Korea
| | - Jeeyoung Kim
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, Korea
- Environmental Health Center, Kangwon National University Hospital, Chuncheon, Korea
| | - Joo Hyun Park
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, Korea
- Department of Internal Medicine, Soonchunyang University Bucheon Hospital, Bucheon, Korea
| | - Byoung-Doo Oh
- Department of Convergence Software, Hallym University, Chuncheon, Korea
| | - Yu-Seop Kim
- Department of Convergence Software, Hallym University, Chuncheon, Korea
| | - Woo Jin Kim
- Department of Internal Medicine, Kangwon National University Hospital, Chuncheon, Korea
- Department of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, Korea
- Environmental Health Center, Kangwon National University Hospital, Chuncheon, Korea.
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15
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D'Urzo AD, Singh D, Donohue JF, Chapman KR, Wise RA. Aclidinium bromide/formoterol fumarate as a treatment for COPD: an update. Expert Rev Respir Med 2021; 15:1093-1106. [PMID: 34137664 DOI: 10.1080/17476348.2021.1920403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Introduction: Aclidinium/formoterol is a long-acting muscarinic antagonist (LAMA) and long-acting β2-agonist (LABA) dual bronchodilator used as a maintenance treatment for patients with chronic obstructive pulmonary disease (COPD). The efficacy of aclidinium/formoterol has been demonstrated consistently in patients with moderate-to-severe COPD versus placebo and monocomponents, with a comparable safety profile.Areas covered: This review examines recent research findings that expand our understanding of the impact of aclidinium/formoterol on the burden of COPD. Reviewed outcomes include improvements in lung function, respiratory symptoms, health-related quality of life, exercise tolerance, exacerbation rates, and clinically important deteriorations. In addition, the reported cardiovascular safety of aclidinium and current LAMA/LABA treatment recommendations are discussed.Expert opinion: Aclidinium/formoterol reduces disease burden in patients with COPD, including those that are treatment-naïve, without a significant increase in safety risk compared with monotherapies. Furthermore, evidence supports an improvement in lung function over a 24-hour period with aclidinium/formoterol treatment versus monotherapy and placebo, which may offer an advantage over some once-daily LAMA/LABA combinations. In summary, the recent evidence discussed in this review adds weight to the use of LAMA/LABA combinations as an initial therapy for certain patients newly diagnosed with COPD.
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Affiliation(s)
- Anthony D D'Urzo
- Department of Family and Community Medicine, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Dave Singh
- Medicines Evaluation Unit, Manchester University NHS Foundations Trust, University of Manchester, Manchester, UK
| | - James F Donohue
- Division of Pulmonary Diseases and Critical Care Medicine, University of North Carolina Pulmonary Critical Medicine, Chapel Hill, NC, USA
| | - Kenneth R Chapman
- Asthma and Airway Center, University Health Network, Toronto, ON, Canada
| | - Robert A Wise
- School of Medicine, Johns Hopkins University, Baltimore, MD, USA
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Abstract
Pharmacological treatment for chronic obstructive pulmonary disease (COPD) aims to alleviate symptoms and reduce the future risk of events such as exacerbations, disease progression and death. The heterogeneity of COPD results in variable responses to pharmacological interventions. COPD treatment has evolved towards a precision medicine approach, integrating clinical and biomarker information in order to optimize treatment decisions for each individual. The evidence supporting the use of blood eosinophil counts to predict responses to inhaled corticosteroids (ICS) in COPD patients has led to the adoption of this biomarker for use in clinical practice. The development of novel double and triple inhaled combination treatments containing long-acting bronchodilators with or without ICS has involved some landmark randomized controlled trials in COPD patients. These studies have provided valuable evidence to direct the use of different classes of combination treatments. However, there are still some unresolved questions and debates. This review article describes the advances in the pharmacological treatment of COPD, particularly the personalization of treatment. The evidence base for current recommendations is discussed, and controversial issues are dissected.
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Affiliation(s)
- Dave Singh
- Division of Infection, Immunity & Respiratory Medicine, University of Manchester, Manchester University NHS Hospital Trust, Manchester, UK
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Sivapalan P, Bikov A, Jensen JU. Using Blood Eosinophil Count as a Biomarker to Guide Corticosteroid Treatment for Chronic Obstructive Pulmonary Disease. Diagnostics (Basel) 2021; 11:236. [PMID: 33546498 PMCID: PMC7913607 DOI: 10.3390/diagnostics11020236] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 01/27/2021] [Accepted: 02/01/2021] [Indexed: 02/07/2023] Open
Abstract
Treating patients hospitalised with acute exacerbations of chronic obstructive pulmonary disease (COPD) usually involves administering systemic corticosteroids. The many unwanted side effects associated with this treatment have led to increased interest in minimising the accumulated corticosteroid dose necessary to treat exacerbations. Studies have shown that short-term treatment with corticosteroids is preferred, and recent trials have shown that biomarkers can be used to further reduce exposure to corticosteroids. Interestingly, high eosinophil counts in patients with acute exacerbations of COPD are indicative of an eosinophilic phenotype with a distinct response to treatment with corticosteroids. In addition, post-hoc analysis of randomised control trials have shown that higher blood eosinophil counts at the start of the study predict a greater response to inhaled corticosteroids in stable COPD. In this review, we examine the studies on this topic, describe how blood eosinophil cell count may be used as a biomarker to guide treatment with corticosteroids, and identify some relevant challenges.
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Affiliation(s)
- Pradeesh Sivapalan
- Department of Internal Medicine, Respiratory Medicine Section, Herlev-Gentofte Hospital, 2900 Hellerup, Denmark;
- Department of Internal Medicine, Zealand University Hospital, 4000 Roskilde, Denmark
| | - András Bikov
- Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester M23 9LT, UK;
- Division of Infection, Immunity and Respiratory Medicine, University of Manchester, Manchester M13 9NT, UK
| | - Jens-Ulrik Jensen
- Department of Internal Medicine, Respiratory Medicine Section, Herlev-Gentofte Hospital, 2900 Hellerup, Denmark;
- Department of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
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