Antagonism of miR-328 increases the antimicrobial function of macrophages and neutrophils and rapid clearance of non-typeable Haemophilus influenzae (NTHi) from infected lung.

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Tay, HL; Kaiko, GE; Plank, M; Li, J; Maltby, S; Essilfie, A-T; Jarnicki, A; Yang, M; Mattes, J; Hansbro, PM; ...Date
2015-04Source Title
PLoS PathogensPublisher
Public Library of Science (PLoS)University of Melbourne Author/s
Jarnicki, AndrewAffiliation
Pharmacology and TherapeuticsMetadata
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Journal ArticleCitations
Tay, H. L., Kaiko, G. E., Plank, M., Li, J., Maltby, S., Essilfie, A. -T., Jarnicki, A., Yang, M., Mattes, J., Hansbro, P. M. & Foster, P. S. (2015). Antagonism of miR-328 increases the antimicrobial function of macrophages and neutrophils and rapid clearance of non-typeable Haemophilus influenzae (NTHi) from infected lung.. PLoS Pathog, 11 (4), pp.e1004549-. https://doi.org/10.1371/journal.ppat.1004549.Access Status
Open AccessOpen Access at PMC
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4404141Abstract
Pathogenic bacterial infections of the lung are life threatening and underpin chronic lung diseases. Current treatments are often ineffective potentially due to increasing antibiotic resistance and impairment of innate immunity by disease processes and steroid therapy. Manipulation miRNA directly regulating anti-microbial machinery of the innate immune system may boost host defence responses. Here we demonstrate that miR-328 is a key element of the host response to pulmonary infection with non-typeable haemophilus influenzae and pharmacological inhibition in mouse and human macrophages augments phagocytosis, the production of reactive oxygen species, and microbicidal activity. Moreover, inhibition of miR-328 in respiratory models of infection, steroid-induced immunosuppression, and smoke-induced emphysema enhances bacterial clearance. Thus, miRNA pathways can be targeted in the lung to enhance host defence against a clinically relevant microbial infection and offer a potential new anti-microbial approach for the treatment of respiratory diseases.
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