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2016 ; 7
(49
): 81474-81492
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TWEAK activation of the non-canonical NF-?B signaling pathway differentially
regulates melanoma and prostate cancer cell invasion
#MMPMID27821799
Armstrong CL
; Galisteo R
; Brown SA
; Winkles JA
Oncotarget
2016[Dec]; 7
(49
): 81474-81492
PMID27821799
show ga
Tumor necrosis factor-like weak inducer of apoptosis (TWEAK) is a multifunctional
cytokine that binds with high affinity to a plasma membrane-anchored receptor
named Fn14. Both TWEAK and Fn14 expression has been detected in human cancer
tissue, and studies have shown that TWEAK/Fn14 signaling can promote either
"pro-cancer" or "anti-cancer" cellular effects in vitro, depending on the cancer
cell line under investigation. In this study, we engineered murine B16 melanoma
cells to secrete high levels of soluble TWEAK and examined their properties.
TWEAK production by B16 cells preferentially activated the non-canonical NF-?B
signaling pathway and increased the expression of several previously described
TWEAK-inducible genes, including Fn14. TWEAK overexpression in B16 cells
inhibited both cell growth and invasion in vitro. The TWEAK-mediated reduction in
B16 cell invasive capacity was dependent on activation of the non-canonical NF-?B
signaling pathway. Finally, we found that this same signaling pathway was also
important for TWEAK-stimulated human DU145 prostate cancer cell invasion.
Therefore, even though TWEAK:Fn14 binding activates non-canonical NF-?B signaling
in both melanoma and prostate cancer cells, this shared cellular response can
trigger a very different downstream outcome (inhibition or stimulation of cell
invasiveness, respectively).