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Cited by 329

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Asthma–COPD Overlap. Clinical Relevance of Genomic Signatures of Type 2 Inflammation in Chronic Obstructive Pulmonary Disease

Open access
Christenson, Stephanie A., Steiling, Katrina, van den Berge, Maarten, Hijazi, Kahkeshan, Hiemstra, Pieter S., Postma, Dirkje S., Lenburg, Marc E., Spira, Avrum, Woodruff, Prescott G.·2015·American Journal of Respiratory and Critical Care Medicine

Abstract

RATIONALE: Chronic obstructive pulmonary disease (COPD) is a heterogeneous disease and likely includes a subgroup that is biologically comparable to asthma. Studying asthma-associated gene expression changes in COPD could add insight into COPD pathogenesis and reveal biomarkers that predict a favorable response to corticosteroids. OBJECTIVES: To determine whether asthma-associated gene signatures are increased in COPD and associated with asthma-related features. METHODS: We compared disease-associated airway epithelial gene expression alterations in an asthma cohort (n = 105) and two COPD cohorts (n = 237, 171). The T helper type 2 (Th2) signature (T2S) score, a gene expression metric induced in Th2-high asthma, was evaluated in these COPD cohorts. The T2S score was correlated with asthma-related features and response to corticosteroids in COPD in a randomized, placebo-controlled trial, the Groningen and Leiden Universities study of Corticosteroids in Obstructive Lung Disease (GLUCOLD; n = 89). MEASUREMENTS AND MAIN RESULTS: The 200 genes most differentially expressed in asthma versus healthy control subjects were enriched among genes associated with more severe airflow obstruction in these COPD cohorts (P < 0.001), suggesting significant gene expression overlap. A higher T2S score was associated with decreased lung function (P < 0.001), but not asthma history, in both COPD cohorts. Higher T2S scores correlated with increased airway wall eosinophil counts (P = 0.003), blood eosinophil percentage (P = 0.03), bronchodilator reversibility (P = 0.01), and improvement in hyperinflation after corticosteroid treatment (P = 0.019) in GLUCOLD. CONCLUSIONS: These data identify airway gene expression alterations that can co-occur in asthma and COPD. The association of the T2S score with increased severity and "asthma-like" features (including a favorable corticosteroid response) in COPD suggests that Th2 inflammation is important in a COPD subset that cannot be identified by clinical history of asthma.

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Metadata

Authors
Christenson, S. A., Steiling, K., van den Berge, M., Hijazi, K., Hiemstra, P. S., Postma, D. S., Lenburg, M. E., Spira, A., & Woodruff, P. G.
Venue
American Journal of Respiratory and Critical Care Medicine
Published
2015-04-01
Volume
191
Issue
7
Pages
758-766
ISSN
  • 1073-449X (ISSN-L)
  • 1535-4970
OpenAlex
W2155112552
Cited by
329
References
32
FWCI
28.78
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Asthma–COPD Overlap. Clinical Relevance of Genomic Signatures of Type 2 Inflammation in Chronic Obstructive Pulmonary Disease. https://app.cochat.ai/papers/10.1164/rccm.201408-1458oc
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Christenson, S. A., Steiling, K., van den Berge, M., Hijazi, K., Hiemstra, P. S., Postma, D. S., Lenburg, M. E., Spira, A., & Woodruff, P. G. (2015). Asthma–COPD Overlap. Clinical Relevance of Genomic Signatures of Type 2 Inflammation in Chronic Obstructive Pulmonary Disease. American Journal of Respiratory and Critical Care Medicine. https://doi.org/10.1164/rccm.201408-1458oc

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