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Nociceptin/OrphaninFQ (N/OFQ) modulates immunopathology and airway hyperresponsiveness representing a novel target for the treatment of asthma

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posted on 2015-12-18, 15:38 authored by David George Lambert, Nikol Sullo, M. Matteis, G. Spaziano, John McDonald, Ruth Saunders, Lucy Woodman, K. Urbanek, A. DeAngelis, R. DePalma, Rachid Berair, Mitesh Pancholi, Vijay Mistry, F. Rossi, R. Guerrini, G. Calo, B. D'Agostino, Christopher E Brightling, Shailendra R. Singh
Background and Purpose There is evidence supporting a role for the nociceptin/orphanin FQ (N/OFQ; NOP) receptor and its endogenous ligand N/OFQ in the modulation of neurogenic inflammation, airway tone and calibre. We hypothesized that NOP receptor activation has beneficial effects upon asthma immunopathology and airway hyperresponsiveness. Therefore, the expression and function of N/OFQ and the NOP receptor were examined in healthy and asthmatic human airway tissues. The concept was further addressed in an animal model of allergic asthma. Experimental Approach NOP receptor expression was investigated by quantitative real-time PCR. Sputum N/OFQ was determined by RIA. N/OFQ function was tested using several assays including proliferation, migration, collagen gel contraction and wound healing. The effects of N/OFQ administration in vivo were studied in ovalbumin (OVA)-sensitized and challenged mice. Key Results NOP receptors were expressed on a wide range of human and mouse immune and airway cells. Eosinophils expressed N/OFQ-precursor mRNA and their number correlated with N/OFQ concentration. N/OFQ was found in human sputum and increased in asthma. Additionally, in asthmatic human lungs N/OFQ immunoreactivity was elevated. NOP receptor activation inhibited migration of immunocytes and increased wound healing in airway structural cells. Furthermore, N/OFQ relaxed spasmogen-stimulated gel contraction. Remarkably, these findings were mirrored in OVA-mice where N/OFQ treatment before or during sensitization substantially reduced airway constriction and immunocyte trafficking to the lung, in particular eosinophils. N/OFQ also reduced inflammatory mediators and mucin production. Conclusions and Implications We demonstrated a novel dual airway immunomodulator/bronchodilator role for N/OFQ and suggest targeting this system as an innovative treatment for asthma.

History

Citation

British Journal of Pharmacology, 2016, 173 (8), pp. 1286–1301

Author affiliation

/Organisation/COLLEGE OF MEDICINE, BIOLOGICAL SCIENCES AND PSYCHOLOGY/School of Medicine/Department of Cardiovascular Sciences

Version

  • AM (Accepted Manuscript)

Published in

British Journal of Pharmacology

Publisher

Wiley

issn

0007-1188

eissn

1476-5381

Acceptance date

2015-12-10

Copyright date

2016

Available date

2017-03-06

Publisher version

http://onlinelibrary.wiley.com/doi/10.1111/bph.13416/abstract

Notes

The file associated with this record is under a 12-month embargo from publication in accordance with the publisher's self-archiving policy, available at http://olabout.wiley.com/WileyCDA/Section/id-820227.html. The full text may be available through the publisher links provided above.

Language

en

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