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2017 ; 50
(3
): 150-155
Nephropedia Template TP
gab.com Text
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Afatinib ameliorates osteoclast differentiation and function through
downregulation of RANK signaling pathways
#MMPMID28256196
Ihn HJ
; Kim JA
; Bae YC
; Shin HI
; Baek MC
; Park EK
BMB Rep
2017[Mar]; 50
(3
): 150-155
PMID28256196
show ga
Non-small-cell lung cancer (NSCLC) is the third most common cancer that spreads
to the bone, resulting in osteolytic lesions caused by hyperactivation of
osteoclasts. Activating mutations in epidermal growth factor receptor-tyrosine
kinase (EGF-TK) are frequently associated with NSCLC, and afatinib is a
first-line therapeutic drug, irreversibly targeting EGF-TK. However, the effects
of afatinib on osteoclast differentiation and activation as well as the
underlying mechanism remain unclear. In this study, afatinib significantly
suppressed receptor activator of nuclear factor ?B (RANK) ligand (RANKL)-induced
osteoclast formation in bone marrow macrophages (BMMs). Consistently, afatinib
inhibited the expression of osteoclast marker genes, whereas, it upregulated the
expression of negative modulator genes. The bone resorbing activity of
osteoclasts was also abrogated by afatinib. In addition, afatinib significantly
inhibited RANKL-mediated Akt/protein kinase B and c-Jun N-terminal kinase
phosphorylation. These results suggest that afatinib substantially suppresses
osteoclastogenesis by downregulating RANK signaling pathways, and thus may reduce
osteolysis after bone metastasis. [BMB Reports 2017; 50(3): 150-155].
|Afatinib
[MESH]
|Animals
[MESH]
|Bone Marrow Cells/cytology
[MESH]
|Bone Resorption/pathology
[MESH]
|Cell Differentiation/drug effects
[MESH]
|Down-Regulation/drug effects
[MESH]
|ErbB Receptors/metabolism
[MESH]
|JNK Mitogen-Activated Protein Kinases/metabolism
[MESH]