Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\25829947
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Fibrogenesis+Tissue+Repair
2015 ; 8
(ä): 5
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Human lung myofibroblast TGF?1-dependent Smad2/3 signalling is Ca(2+)-dependent
and regulated by KCa3 1 K(+) channels
#MMPMID25829947
Roach KM
; Feghali-Bostwick C
; Wulff H
; Amrani Y
; Bradding P
Fibrogenesis Tissue Repair
2015[]; 8
(ä): 5
PMID25829947
show ga
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a common and invariably lethal
interstitial lung disease with poorly effective therapy. Blockade of the K(+)
channel KCa3.1 reduces constitutive ?-SMA and Smad2/3 nuclear translocation in
IPF-derived human lung myofibroblasts (HLMFs), and inhibits several transforming
growth factor beta 1 (TGF?1)-dependent cell processes. We hypothesized that
KCa3.1-dependent cell processes also regulate the TGF?1-dependent Smad2/3
signalling pathway in HLMFs. HLMFs obtained from non-fibrotic controls (NFC) and
IPF lungs were grown in vitro and examined for ?SMA expression by
immunofluorescence, RT-PCR, and flow cytometry. Two specific and distinct KCa3.1
blockers (TRAM-34 200 nM and ICA-17043 [Senicapoc] 100 nM) were used to determine
their effects on TGF?1-dependent signalling. Expression of phosphorylated and
total Smad2/3 following TGF?1 stimulation was determined by Western blot and
Smad2/3 nuclear translocation by immunofluorescence. RESULTS: KCa3.1 block
attenuated TGF?1-dependent Smad2/3 phosphorylation and nuclear translocation, and
this was mimicked by lowering the extracellular Ca(2+) concentration. KCa3.1
block also inhibited Smad2/3-dependent gene transcription (?SMA, collagen type
I), inhibited KCa3.1 mRNA expression, and attenuated TGF?1-dependent ?SMA protein
expression. CONCLUSIONS: KCa3.1 activity regulates TGF?1-dependent effects in
NFC- and IPF-derived primary HLMFs through the regulation of the TGF?1/Smad
signalling pathway, with promotion of downstream gene transcription and protein
expression. KCa3.1 blockers may offer a novel approach to treating IPF.