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2017 ; 50
(2
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Senolytic drugs target alveolar epithelial cell function and attenuate
experimental lung fibrosis ex vivo
#MMPMID28775044
Lehmann M
; Korfei M
; Mutze K
; Klee S
; Skronska-Wasek W
; Alsafadi HN
; Ota C
; Costa R
; Schiller HB
; Lindner M
; Wagner DE
; Günther A
; Königshoff M
Eur Respir J
2017[Aug]; 50
(2
): ä PMID28775044
show ga
Idiopathic pulmonary fibrosis (IPF) is a devastating lung disease with poor
prognosis and limited therapeutic options. The incidence of IPF increases with
age, and ageing-related mechanisms such as cellular senescence have been proposed
as pathogenic drivers. The lung alveolar epithelium represents a major site of
tissue injury in IPF and senescence of this cell population is probably
detrimental to lung repair. However, the potential pathomechanisms of alveolar
epithelial cell senescence and the impact of senolytic drugs on senescent lung
cells and fibrosis remain unknown. Here we demonstrate that lung epithelial cells
exhibit increased P16 and P21 expression as well as senescence-associated
?-galactosidase activity in experimental and human lung fibrosis tissue and
primary cells.Primary fibrotic mouse alveolar epithelial type (AT)II cells
secreted increased amounts of senescence-associated secretory phenotype (SASP)
factors in vitro, as analysed using quantitative PCR, mass spectrometry and
ELISA. Importantly, pharmacological clearance of senescent cells by induction of
apoptosis in fibrotic ATII cells or ex vivo three-dimensional lung tissue
cultures reduced SASP factors and extracellular matrix markers, while increasing
alveolar epithelial markers.These data indicate that alveolar epithelial cell
senescence contributes to lung fibrosis development and that senolytic drugs may
be a viable therapeutic option for IPF.