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2015 ; 75
(18
): 3699-705
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gab.com Text
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English Wikipedia
Warfarin Blocks Gas6-Mediated Axl Activation Required for Pancreatic Cancer
Epithelial Plasticity and Metastasis
#MMPMID26206560
Kirane A
; Ludwig KF
; Sorrelle N
; Haaland G
; Sandal T
; Ranaweera R
; Toombs JE
; Wang M
; Dineen SP
; Micklem D
; Dellinger MT
; Lorens JB
; Brekken RA
Cancer Res
2015[Sep]; 75
(18
): 3699-705
PMID26206560
show ga
Repurposing "old" drugs can facilitate rapid clinical translation but
necessitates novel mechanistic insight. Warfarin, a vitamin K "antagonist" used
clinically for the prevention of thrombosis for more than 50 years, has been
shown to have anticancer effects. We hypothesized that the molecular mechanism
underlying its antitumor activity is unrelated to its effect on coagulation, but
is due to inhibition of the Axl receptor tyrosine kinase on tumor cells.
Activation of Axl by its ligand Gas6, a vitamin K-dependent protein, is inhibited
at doses of warfarin that do not affect coagulation. Here, we show that
inhibiting Gas6-dependent Axl activation with low-dose warfarin, or with other
tumor-specific Axl-targeting agents, blocks the progression and spread of
pancreatic cancer. Warfarin also inhibited Axl-dependent tumor cell migration,
invasiveness, and proliferation while increasing apoptosis and sensitivity to
chemotherapy. We conclude that Gas6-induced Axl signaling is a critical driver of
pancreatic cancer progression and its inhibition with low-dose warfarin or other
Axl-targeting agents may improve outcome in patients with Axl-expressing tumors.
|Animals
[MESH]
|Antineoplastic Combined Chemotherapy Protocols/therapeutic use
[MESH]