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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
2014 ; 289
(51
): 35456-67
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Isoquercitrin suppresses colon cancer cell growth in vitro by targeting the
Wnt/?-catenin signaling pathway
#MMPMID25359775
Amado NG
; Predes D
; Fonseca BF
; Cerqueira DM
; Reis AH
; Dudenhoeffer AC
; Borges HL
; Mendes FA
; Abreu JG
J Biol Chem
2014[Dec]; 289
(51
): 35456-67
PMID25359775
show ga
Flavonoids are plant-derived polyphenolic molecules that have potential
biological effects including anti-oxidative, anti-inflammatory, anti-viral, and
anti-tumoral effects. These effects are related to the ability of flavonoids to
modulate signaling pathways, such as the canonical Wnt signaling pathway. This
pathway controls many aspects of embryonic development and tissue maintenance and
has been found to be deregulated in a range of human cancers. We performed
several in vivo assays in Xenopus embryos, a functional model of canonical Wnt
signaling studies, and also used in vitro models, to investigate whether
isoquercitrin affects Wnt/?-catenin signaling. Our data provide strong support
for an inhibitory effect of isoquercitrin on Wnt/?-catenin, where the flavonoid
acts downstream of ?-catenin translocation to the nuclei. Isoquercitrin affects
Xenopus axis establishment, reverses double axes and the LiCl hyperdorsalization
phenotype, and reduces Xnr3 expression. In addition, this flavonoid shows
anti-tumoral effects on colon cancer cells (SW480, DLD-1, and HCT116), whereas
exerting no significant effect on non-tumor colon cell (IEC-18), suggesting a
specific effect in tumor cells in vitro. Taken together, our data indicate that
isoquercitrin is an inhibitor of Wnt/?-catenin and should be further investigated
as a potential novel anti-tumoral agent.