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Mannose-binding lectin deficiency and acute exacerbations of chronic obstructive pulmonary disease

Authors Albert RK, Connett J, Curtis JL, Martinez FJ, Han MK, Lazarus SC, Woodruff PG

Received 9 May 2012

Accepted for publication 9 July 2012

Published 23 November 2012 Volume 2012:7 Pages 767—777

DOI https://doi.org/10.2147/COPD.S33714

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Richard K Albert,1 John Connett,2 Jeffrey L Curtis,3,4 Fernando J Martinez,3 MeiLan K Han,3 Stephen C Lazarus,5 Prescott G Woodruff5

1Medicine Service, Denver Health and Department of Medicine, University of Colorado Denver, Denver, CO, 2Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN, 3Pulmonary and Critical Care Medicine, Department of Medicine, University of Michigan, Ann Arbor, MI, 4Pulmonary and Critical Care Medicine, VA Medical Center, Ann Arbor, MI, 5Pulmonary and Critical Care Medicine, Department of Medicine, and Cardiovascular Research Institute, University of California, San Francisco, CA, USA

Background: Mannose-binding lectin is a collectin involved in host defense against infection. Whether mannose-binding lectin deficiency is associated with acute exacerbations of chronic obstructive pulmonary disease is debated.
Methods: Participants in a study designed to determine if azithromycin taken daily for one year decreased acute exacerbations had serum mannose-binding lectin concentrations measured at the time of enrollment.
Results: Samples were obtained from 1037 subjects (91%) in the trial. The prevalence of mannose-binding lectin deficiency ranged from 0.5% to 52.2%, depending on how deficiency was defined. No differences in the prevalence of deficiency were observed with respect to any demographic variable assessed, and no differences were observed in time to first exacerbation, rate of exacerbations, or percentage of subjects requiring hospitalization for exacerbations in those with deficiency versus those without, regardless of how deficiency was defined.
Conclusion: In a large sample of subjects with chronic obstructive pulmonary disease selected for having an increased risk of experiencing an acute exacerbation of chronic obstructive pulmonary disease, only 1.9% had mannose-binding lectin concentrations below the normal range and we found no association between mannose-binding lectin concentrations and time to first acute exacerbation or frequency of acute exacerbations during one year of prospective follow-up.

Keywords: COPD, acute exacerbations, mannose-binding lectin

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