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2016 ; 6
(ä): 22113
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gab.com Text
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English Wikipedia
The fusion protein SS18-SSX1 employs core Wnt pathway transcription factors to
induce a partial Wnt signature in synovial sarcoma
#MMPMID26905812
Cironi L
; Petricevic T
; Fernandes Vieira V
; Provero P
; Fusco C
; Cornaz S
; Fregni G
; Letovanec I
; Aguet M
; Stamenkovic I
Sci Rep
2016[Feb]; 6
(ä): 22113
PMID26905812
show ga
Expression of the SS18/SYT-SSX fusion protein is believed to underlie the
pathogenesis of synovial sarcoma (SS). Recent evidence suggests that deregulation
of the Wnt pathway may play an important role in SS but the mechanisms whereby
SS18-SSX might affect Wnt signaling remain to be elucidated. Here, we show that
SS18/SSX tightly regulates the elevated expression of the key Wnt target AXIN2 in
primary SS. SS18-SSX is shown to interact with TCF/LEF, TLE and HDAC but not
?-catenin in vivo and to induce Wnt target gene expression by forming a complex
containing promoter-bound TCF/LEF and HDAC but lacking ?-catenin. Our
observations provide a tumor-specific mechanistic basis for Wnt target gene
induction in SS that can occur in the absence of Wnt ligand stimulation.