The IRONy of Iron-overload and Iron-deficiency in Chronic Obstructive Pulmonary Disease.
File(s)BLUE_IRON REVIEW_REVISED MS.docx (286.58 KB)
Accepted version
Author(s)
Type
Journal Article
Abstract
Chronic obstructive pulmonary disease (COPD) is a debilitating inflammatory lung disease associated with cigarette smoking and is third leading cause of death worldwide. With the recent emergence of genome wide association studies (GWAS), the identification of multiple COPD susceptibility genes has enhanced and expanded our understanding of the pathogenic mechanisms associated with this debilitating lung disease. An example of such a pathogenic mechanism is the role of iron metabolism in the onset and progression of COPD. Historic observations of iron dysregulation in COPD can now be enlightened by the recent revelations that genetic polymorphisms in the gene iron regulatory protein-2 (IRP-2) associate with COPD susceptibility. A functional role for IRP-2 is supported by IRP-2 overexpression in murine models, that demonstrates cellular and mitochondrial iron accumulation in the lung linked with manifestations of experimental COPD. Increased IRP2 may explain the excessive iron deposition in alveolar macrophages and tissue in smokers and in patients with COPD. Changes in IRP2 expression may also associate with systemic iron mismanagement, which may explain the prevalence of systemic iron deficiency and iron-deficiency anemia in patients with COPD. It may also help to explain why patients with COPD and/or iron deficiency manifest altered responses to hypoxia including erythropoiesis and pulmonary hypertension. We provide a concise review of the role of iron in the pathogenesis, susceptibility and progression of COPD and highlight the prospective therapeutic interventions for treating both local and systemic iron dysregulation.
Date Issued
2017-04-14
Date Acceptance
2017-04-12
Citation
American Journal of Respiratory and Critical Care Medicine, 2017, 196 (9)
ISSN
1535-4970
Publisher
American Thoracic Society
Journal / Book Title
American Journal of Respiratory and Critical Care Medicine
Volume
196
Issue
9
Copyright Statement
© 2017 the American Thoracic Society
Sponsor
Wellcome Trust
British Heart Foundation
British Heart Foundation
Grant Number
093080/Z/10/Z
PG/14/27/30679
PG/15/56/31573
Subjects
11 Medical And Health Sciences
Respiratory System
Publication Status
Published