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Sputum Streptococcus pneumoniae is reduced in COPD following treatment with benralizumab

Authors George L, Wright A, Mistry V, Sutcliffe A, Chachi L, Haldar K, Ramsheh MY, Richardson M, van der Merwe R, Martin U, Newbold P, Brightling CE

Received 14 December 2018

Accepted for publication 29 March 2019

Published 5 June 2019 Volume 2019:14 Pages 1177—1185


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Dr Richard Russell

Leena George,1 Adam Wright,1 Vijay Mistry,1 Amanda Sutcliffe,1 Latifa Chachi,1 Koirobi Haldar,1 Mohammadali Yavari Ramsheh,1 Matthew Richardson,1 René van der Merwe,2 Ubaldo Martin,3 Paul Newbold,3 Christopher E Brightling1

1Department of Respiratory Sciences, Institute for Lung Health, National Institute for Health Research Biomedical Research Centre, University of Leicester, Leicester, UK; 2Clinical Respiratory Management, MedImmune Ltd., Cambridge, UK; 3Global Medical Affairs, AstraZeneca, Gaithersburg, MD, USA

Abstract: We hypothesized whether the reduction in eosinophilic airway inflammation in patients with chronic obstructive pulmonary disease (COPD) following treatment with benralizumab, a humanized, afucosylated, monoclonal antibody that binds to interleukin-5 receptor α, increases the airway bacterial load. Analysis of sputum samples of COPD patients participating in a Phase II trial of benralizumab indicated that sputum 16S rDNA load and Streptococcus pneumoniae were reduced following treatment with benralizumab. However, in vitro, eosinophils did not affect the killing of the common airway pathogens S. pneumoniae or Haemophilus influenzae. Thus, benralizumab may have an indirect effect upon airway bacterial load.

Keywords: COPD, benralizumab, IL-5, bacterial load, S. pneumoniae, H. influenzae

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