University of Leicester
Browse
Characterisation of P2Y(12) receptor responsiveness to cysteinyl leukotrienes..pdf (603.04 kB)
Download file

Characterisation of P2Y(12) receptor responsiveness to cysteinyl leukotrienes

Download (603.04 kB)
journal contribution
posted on 2015-08-24, 14:53 authored by Holly R. Foster, Elisabeth Fuerst, Tak H. Lee, Davis J. Cousins, Grzegorz Woszczek
Leukotriene E4 (LTE4), the most stable of the cysteinyl leukotrienes (cysLTs), binds poorly to classical type 1 and 2 cysLT receptors although in asthmatic individuals it may potently induce bronchial constriction, airway hyperresponsiveness and inflammatory cell influx to the lung. A recent study has suggested that the purinergic receptor P2Y12 is required for LTE4 mediated pulmonary inflammation in a mouse model of asthma and signals in response to cysLTs. The aim of the study was to characterise the responsiveness of human P2Y12 to cysteinyl leukotrienes. Models of human CysLT1, CysLT2 and P2Y12 overexpressed in HEK293, CHO cells and human platelets were used and responsiveness to different agonists was measured using intracellular calcium, cAMP and β-arrestin recruitment assays. CysLTs induced concentration dependent calcium mobilisation in cells overexpressing CysLT1 and CysLT2 but failed to induce any calcium response in cells expressing P2Y12 or P2Y12+ Gα16. In contrast, selective P2Y12 agonists ADP and 2-MeS-ADP induced specific calcium flux in cells expressing P2Y12+ Gα16. Similarly, specific response to 2-MeS-ADP, but not to cysLTs was also observed in cells expressing P2Y12 when intracellular cAMP and β-arrestin signalling were analysed. Platelets were used as a model of human primary cells expressing P2Y12 to analyse potential signalling and cell activation through P2Y12 receptor or receptor heterodimers but no specific LTE4 responses were observed. These results show that LTE4 as well as other cysLTs do not activate intracellular signalling acting through P2Y12 and suggest that another LTE4 specific receptor has yet to be identified.

History

Citation

PLoS One, 2013, 8 (3):e58305

Author affiliation

/Organisation/COLLEGE OF MEDICINE, BIOLOGICAL SCIENCES AND PSYCHOLOGY/School of Medicine/Department of Infection, Immunity and Inflammation

Version

  • VoR (Version of Record)

Published in

PLoS One

Publisher

Public Library of Science

eissn

1932-6203

Copyright date

2013

Available date

2015-08-24

Publisher version

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0058305

Language

en