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2017 ; 8
(22
): 35962-35972
Nephropedia Template TP
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English Wikipedia
The purinergic receptor subtype P2Y2 mediates chemotaxis of neutrophils and
fibroblasts in fibrotic lung disease
#MMPMID28415591
Müller T
; Fay S
; Vieira RP
; Karmouty-Quintana H
; Cicko S
; Ayata K
; Zissel G
; Goldmann T
; Lungarella G
; Ferrari D
; Di Virgilio F
; Robaye B
; Boeynaems JM
; Blackburn MR
; Idzko M
Oncotarget
2017[May]; 8
(22
): 35962-35972
PMID28415591
show ga
Idiopathic pulmonary fibrosis (IPF) is a devastating disease with few available
treatment options. Recently, the involvement of purinergic receptor subtypes in
the pathogenesis of different lung diseases has been demonstrated. Here we
investigated the role of the purinergic receptor subtype P2Y2 in the context of
fibrotic lung diseases.The concentration of different nucleotides was measured in
the broncho-alveolar lavage (BAL) fluid derived from IPF patients and animals
with bleomycin-induced pulmonary fibrosis. In addition expression of P2Y2
receptors by different cell types was determined. To investigate the functional
relevance of P2Y2 receptors for the pathogenesis of the disease the bleomycin
model of pulmonary fibrosis was used. Finally, experiments were performed in
pursuit of the involved mechanisms.Compared to healthy individuals or vehicle
treated animals, extracellular nucleotide levels in the BAL fluid were increased
in patients with IPF and in mice after bleomycin administration, paralleled by a
functional up-regulation of P2Y2R expression. Both bleomycin-induced inflammation
and fibrosis were reduced in P2Y2R-deficient compared to wild type animals.
Mechanistic studies demonstrated that recruitment of neutrophils into the lungs,
proliferation and migration of lung fibroblasts as well as IL6 production are key
P2Y2R mediated processes.Our results clearly demonstrate the involvement of P2Y2R
subtypes in the pathogenesis of fibrotic lung diseases in humans and mice and
hence support the development of selective P2Y2R antagonists for the treatment of
IPF.