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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Biol+Chem
2016 ; 291
(40
): 20891-20899
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gab.com Text
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English Wikipedia
The MET/Vascular Endothelial Growth Factor Receptor (VEGFR)-targeted Tyrosine
Kinase Inhibitor Also Attenuates FMS-dependent Osteoclast Differentiation and
Bone Destruction Induced by Prostate Cancer
#MMPMID27539855
Watanabe K
; Hirata M
; Tominari T
; Matsumoto C
; Fujita H
; Yonekura K
; Murphy G
; Nagase H
; Miyaura C
; Inada M
J Biol Chem
2016[Sep]; 291
(40
): 20891-20899
PMID27539855
show ga
The tyrosine kinase inhibitor TAS-115 that blocks VEGF receptor and hepatocyte
growth factor receptor MET signaling exhibits antitumor properties in xenografts
of human gastric carcinoma. In this study, we have evaluated the efficacy of
TAS-115 in preventing prostate cancer metastasis to the bone and bone destruction
using the PC3 cell line. When PC3 cells were injected into proximal tibiae in
nude mouse, severe trabecular and cortical bone destruction and subsequent tumor
growths were detected. Oral administration of TAS-115 almost completely inhibited
both PC3-induced bone loss and PC3 cell proliferation by suppressing osteoclastic
bone resorption. In an ex vivo bone organ culture, PC3 cells induced osteoclastic
bone resorption when co-cultured with calvarial bone, but TAS-115 effectively
suppressed the PC3-induced bone destruction. We found that macrophage
colony-stimulating factor-dependent macrophage differentiation and subsequent
receptor activator of NF-?B ligand-induced osteoclast formation were largely
suppressed by adding TAS-115. The phosphorylation of the macrophage
colony-stimulating factor receptor FMS and osteoclast related kinases such as ERK
and Akt were also suppressed by the presence of TAS-115. Gene expression
profiling showed that FMS expression was only seen in macrophage and in the
osteoclast cell lineage. Our study indicates that tyrosine kinase signaling in
host pre-osteoclasts/osteoclasts is critical for bone destruction induced by
tumor cells and that targeting of MET/VEGF receptor/FMS activity makes it a
promising therapeutic candidate for the treatment of prostate cancer patients
with bone metastasis.