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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+Neuropathol+Exp+Neurol
2015 ; 74
(9
): 889-900
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Pharmacologic Wnt Inhibition Reduces Proliferation, Survival, and Clonogenicity
of Glioblastoma Cells
#MMPMID26222502
Kahlert UD
; Suwala AK
; Koch K
; Natsumeda M
; Orr BA
; Hayashi M
; Maciaczyk J
; Eberhart CG
J Neuropathol Exp Neurol
2015[Sep]; 74
(9
): 889-900
PMID26222502
show ga
Wingless (Wnt) signaling is an important pathway in gliomagenesis and in the
growth of stem-like glioma cells. Using immunohistochemistry to assess the
translocation of ?-catenin protein, we identified intranuclear staining
suggesting Wnt pathway activation in 8 of 43 surgical samples (19%) from adult
patients with glioblastoma and in 9 of 30 surgical samples (30%) from pediatric
patients with glioblastoma. Wnt activity, evidenced by nuclear ?-catenin in our
cohort and high expression of its target AXIN2 (axis inhibitor protein 2) in
published glioma datasets, was associated with shorter patient survival, although
this was not statistically significant. We determined the effects of the
porcupine inhibitor LGK974 on 3 glioblastoma cell lines with elevated AXIN2 and
found that it reduced Wnt pathway activity by 50% or more, as assessed by T-cell
factor luciferase reporters. Wnt inhibition led to suppression of growth,
proliferation in cultures, and modest induction of cell death. LGK974 reduced
NANOG messenger RNA levels and the fraction of cells expressing the stem cell
marker CD133 in neurosphere cultures, induced glial differentiation, and
suppressed clonogenicity. These data indicate that LGK974 is a promising new
agent that can inhibit the canonical Wnt pathway in vitro, slow tumor growth, and
deplete stem-like clonogenic cells, thereby providing further support for
targeting Wnt in patients with glioblastoma.