1. Activation of P2RY11 and ATP release by lipoxin A4 restores the airway surface liquid layer and epithelial repair in cystic fibrosis
- Author
-
Gerard Higgins, Mazen Al-Alawi, Valia Verriere, Paul Buchanan, Valerie Urbach, Richard W. Costello, Paul McNally, Brian J. Harvey, Marianne Perriere, Institut Mondor de Recherche Biomédicale (IMRB), and Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR10-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)
- Subjects
Time Factors ,Cystic Fibrosis ,Clinical Biochemistry ,[SDV.BC.BC]Life Sciences [q-bio]/Cellular Biology/Subcellular Processes [q-bio.SC] ,[SDV.IMM.II]Life Sciences [q-bio]/Immunology/Innate immunity ,[SDV.MHEP.PSR]Life Sciences [q-bio]/Human health and pathology/Pulmonology and respiratory tract ,Connexins ,chemistry.chemical_compound ,0302 clinical medicine ,Adenosine Triphosphate ,ATP hydrolysis ,Cell Movement ,Cyclic AMP ,Purinergic P2 Receptor Antagonists ,Receptors, Lipoxin ,Lung ,ComputingMilieux_MISCELLANEOUS ,Calcium signaling ,0303 health sciences ,3. Good health ,Cell biology ,[SDV.BBM.BP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biophysics ,Lipoxins ,Autocrine Communication ,[SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology ,Biochemistry ,030220 oncology & carcinogenesis ,Signal transduction ,Intracellular ,Signal Transduction ,Pulmonary and Respiratory Medicine ,Primary Cell Culture ,Nerve Tissue Proteins ,[SDV.BC]Life Sciences [q-bio]/Cellular Biology ,Respiratory Mucosa ,Biology ,Cell Line ,03 medical and health sciences ,[SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO] ,Humans ,Regeneration ,Calcium Signaling ,[SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biochemistry [q-bio.BM] ,Molecular Biology ,Ion transporter ,030304 developmental biology ,Adaptor Proteins, Signal Transducing ,Cell Proliferation ,Lipoxin ,Receptors, Purinergic P2 ,Epithelial Cells ,Cell Biology ,Adenosine receptor ,Receptors, Formyl Peptide ,chemistry ,[SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology ,Adenosine triphosphate - Abstract
In cystic fibrosis (CF), the airway surface liquid (ASL) height is reduced as a result of impaired ion transport, which favors bacterial colonization and inflammation of the airway and leads to progressive lung destruction. Lipoxin (LX)A4, which promotes resolution of inflammation, is inadequately produced in the airways of patients with CF. We previously demonstrated that LXA4 stimulates an ASL height increase and epithelial repair. Here we report the molecular mechanisms involved in these processes. We found that LXA4 (1 nM) induced an apical ATP release from non-CF (NuLi-1) and CF (CuFi-1) airway epithelial cell lines and CF primary cultures. The ATP release induced by LXA4 was completely inhibited by antagonists of the ALX/FPR2 receptor and Pannexin-1 channels. LXA4 induced an increase in intracellular cAMP and calcium, which were abolished by the selective inhibition of the P2RY11 purinoreceptor. Pannexin-1 and ATP hydrolysis inhibition and P2RY11 purinoreceptor knockdown all abolished the increase of ASL height induced by LXA4. Inhibition of the A2b adenosine receptor did not affect the ASL height increase induced by LXA4, whereas the PKA inhibitor partially inhibited this response. The stimulation of NuLi-1 and CuFi-1 cell proliferation, migration, and wound repair by LXA4 was inhibited by the antagonists of Pannexin-1 channel and P2RY11 purinoreceptor. Taken together, our results provide evidence for a novel role of LXA4 in stimulating apical ATP secretion via Pannexin-1 channels and P2RY11 purinoreceptors activation leading to an ASL height increase and epithelial repair.
- Published
- 2014
- Full Text
- View/download PDF